INSTALLATION AND

OPERATION MANUAL

Gas-Fired Pool
and Spa Heater
Atmospheric Models 206A, 266A,
336A, and 406A

AAWARNING: If the information in the instructions is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.

- Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in
the vicinity of this or any other appliance. To do so may result in an explosion or fire.

- WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.

This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future
reference.
Catalog No. 6000.59AF
Effective: 10-01-19
Replaces: 07-15-18
P/N 241236 Rev. 33
 QUICK START GUIDE

CLEARANCES WATER CHEMISTRY

†† Space required: See page 12. †† Water chemistry requirements: See page 5.
†† Minimum and service clearances: See page 7 for
clearances table. Note that local codes prevail. POWER
†† Supply voltage: See page 23 for acceptable input
voltages.
PIPING
†† Pressure relief valve: See page 20 for recommended
PRV orientation. VENTING
†† Flow rates: See page 17 for flow rate values. †† Materials: See pages 11 and 14.
†† D-2 Power Vent Kit: See page 14.
†† Indoor Stack: See page 11.
GAS
†† Distance to regulator (pipe lengths) and gas inlet
sizes: See page 17. CONTROLS INTERFACE
†† Required pressure for Natural Gas: †† Wiring diagrams: See page 24 and 25.
Min = 6" WC, Max = 10.5" WC †† User interface: See pages 26 and 27.
†† Required pressure for Propane Gas: †† Remote operation: See page 30.
Min = 12" WC, Max = 13" WC
†† Sediment trap is required for all installations.
See page 15.

Revision 33 reflects the following changes:

This manual has been reformatted to the latest Raypak manual style. Added "Quick Start Guide" on page 2. The Low NOx heaters section has been
removed from this manual. Added "ProTek Shield™" information.

2
 CONTENTS
1. WARNINGS.............................................................. 4 6. WIRING DIAGRAM - MILLIVOLT........................ 24
Pay Attention to These Terms.................................. 4 7. WIRING DIAGRAM - DIGITAL............................. 25
2. WATER CHEMISTRY.............................................. 5 8. CONTROLS............................................................ 26
Automatic Chlorinators and Chemical Feeders....... 5 Control Panel Removal.......................................... 26
3. BEFORE INSTALLATION....................................... 6 Control Adjustments - Millivolt Models................... 26
Receiving equipment............................................... 6 Control Adjustments – Digital Models.................... 27
Rating and certifications........................................... 6 Operation............................................................... 27
Elevation.................................................................. 7 Status and Diagnostics.......................................... 29
Ambient Temperature Rating................................... 7 Remote Control Wiring - Digital Models Only........ 30
4. INSTALLATION........................................................ 7 9. OPERATING INSTRUCTIONS............................. 36
Installation Codes.................................................... 7 Before Start-Up...................................................... 36
Clearances............................................................... 7 Start-Up Procedures.............................................. 36
Outdoor Heater Installation...................................... 8 Visual inspection.................................................... 36
Combustion and Ventilation Air.............................. 11 Water Pressure Switch........................................... 36
Vent Piping............................................................. 14 10. MAINTENANCE AND CARE................................ 39
D-2 Power Vent Kit................................................. 14 Cold Weather Operation........................................ 39
Gas Supply Connections....................................... 15
11. TROUBLESHOOTING.......................................... 40
Flow Rates............................................................. 17
ProTek Shield Assembly........................................ 18 Millivolt - Flow Chart............................................... 41
Unitherm Governor Operation................................ 19 Digital - Flow Chart................................................ 42
Internal Automatic Bypass Valve............................ 19 Control Logic - Flow Chart - Digital........................ 43
External Auxiliary Bypass Valve............................. 19 12. REPLACEMENT PARTS...................................... 44
Auxiliary Bypass Valve Adjustment........................ 20 13. ILLUSTRATED PARTS LIST............................... 45
Pressure Relief Valve Installation........................... 20
Heat Exchanger Reversal...................................... 20
Plumbing Diagrams................................................ 21
5. ELECTRICAL WIRING.......................................... 22
Millivolt Models....................................................... 22
Digital Models........................................................ 22
Electrical Power Draw............................................ 23
Transformer Wiring................................................ 23

3
1. WARNINGS
Pay Attention to These Terms
Indicates the presence of immediate hazards which will cause severe personal injury, death or
DANGER
AA substantial property damage if ignored.

Indicates the presence of hazards or unsafe practices which could cause severe personal injury,
WARNING
AA death or substantial property damage if ignored.

Indicates the presence of hazards or unsafe practices which could cause minor personal injury
CAUTION
AA or product or property damage if ignored.

CAUTION used without the warning alert symbol indicates a potentially hazardous condition
CAUTION
which could cause minor personal injury or product or property damage if ignored.

Indicates special instructions on installation, operation, or maintenance which are important but
NOTE
not related to personal injury hazards.

AA DANGER: Failure to install the drafthood on indoor WARNING: Improper installation, adjustment,
installation and properly vent the heater to the outdoors
AA
alteration, service, or maintenance can cause property
as outlined in the venting section of this manual can damage, personal injury or loss of life. Installation
result in unsafe operation of the heater. To avoid the risk and service must be performed by a qualified installer,
of fire, explosion, or asphyxiation from carbon monoxide, service agency, or the gas supplier.
never operate this heater unless it is properly vented
and has an adequate air supply for proper operation. Be
AA WARNING: Gasoline, as well as other flammable
sure to inspect the vent system for proper installation at
materials and liquids (adhesives, solvents, etc.), and
initial start-up, and at least annually thereafter. Refer to
the vapors they produce, are extremely dangerous. Do
the venting section of this manual for more information
not handle, use, or store gasoline or other flammable or
regarding vent system inspections.
combustible materials in the vicinity of a heater.

AAWARNING: To minimize the possibility of improper

AA WARNING: Both natural gas and propane have
operation, serious personal injury, fire, or damage to the
an odorant added to aid in detecting a gas leak. Some
heater:
people may not physically be able to smell or recognize
• Always keep the area around the heater free of this odorant. If you are unsure or unfamiliar with the
combustible materials, gasoline, and other flammable smell of natural gas or propane, ask your local gas
liquids and vapors. supplier. Other conditions, such as “odorant fade,”
• Heater should never be covered or have any blockage which causes the odorant to diminish in intensity, can
to the flow of fresh air to the heater. also hide, camouflage, or otherwise make detecting a
gas leak by smell more difficult.
AA WARNING: This unit contains refractory ceramic
fiber (RCF) insulation in the combustion chamber. RCF, AA WARNING: UL-recognized fuel gas detectors are
as manufactured, does not contain respirable crystalline recommended in all enclosed propane and natural
silica. However, following sustained exposure to very gas applications wherein there is a potential for an
high temperatures [>2192°F (1200°C)], the RCF can explosive mixture of fuel gas to accumulate and their
transform into crystalline silica (cristabolite). The installation should be in accordance with the detector
International Agency for Research on Cancer (IARC) has manufacturer’s recommendations and/or local laws,
classified the inhalation of crystalline silica (cristabolite) rules, regulations, or customs.
as carcinogenic to humans.
AA WARNING: Do not install within 3 feet (0.9 m) of
When removing the burners or heat exchangers, take a heat pump or an outdoor condensing unit. Strong
precautions to avoid creating airborne dust and avoid air intake from this type of equipment can disturb the
inhaling airborne fibers. When cleaning spills, use wet combustion process and cause damage or personal
sweeping or High Efficiency Particulate Air (HEPA) injury.
filtered vacuum to minimize airborne dust. Use feasible
engineering controls such as local exhaust ventilation
AA WARNING: The heater shall not be located in an
or dust collecting systems to minimize airborne dust.
area where water sprinklers, or other devices, may cause
Wear appropriate personal protective equipment
water to spray through the cabinet louvers and into the
including gloves, safety glasses with side shields, and
heater. This could cause internal rusting or damage
appropriate NIOSH certified respiratory protection,
electrical components, and void the warranty.
to avoid inhalation of airborne dust and airborne fiber
particles.

4
 CAUTION: Elevated water temperature can be
AA severely damage the heater. Heat exchanger damage
hazardous. The U.S. Consumer Product Safety resulting from chemical imbalance is not covered by
Commission has these guidelines: the warranty.
1. Spa water temperatures should never exceed 104°F For your health and the protection of your pool equipment,
(40°C). A temperature of 100°F (38°C) is considered it is essential that your water be chemically balanced. The
safe for a healthy adult. Special caution is suggested following levels must be used as a guide for balanced
for young children. water.
2. Drinking of alcoholic beverages before or during spa
or hot tub use can cause drowsiness which could AACAUTION: Free chlorine must not exceed 5 ppm
lead to unconsciousness and subsequently result in which can damage the heater and is not covered under
drowning. warranty.

3. Pregnant Women Beware! Soaking in water over • Occasional chemical shock dosing of the pool or spa
102°F (39°C) can cause fetal damage during the first
water should not damage the heater providing the
three months of pregnancy resulting in the birth of a
brain-damaged or deformed child. Pregnant women
water is balanced.
should stick to the 100°F (38°C) maximum rule. • Automatic chemical dosing devices and salt
4. Before entering the spa or hot tub, users should chlorinators are usually more efficient in heated
check the water temperature with an accurate water, unless controlled, they can lead to excessive
thermometer; spa or hot tub thermostats may err chlorine level which can damage your heater.
in regulating water temperatures by as much as 4°F
(2.2°C).
• Check valve should be installed between the heater
outlet and a chlorinator or other chemical dosing
5. Persons with a medical history of heart disease, device.
circulatory problems, diabetes, or blood pressure
problems should obtain a physician’s advice before • Further advice should be obtained from your pool
using pools or hot tubs. or spa builder, accredited pool shop, or chemical
6. Persons taking medications which induce supplier for the correct levels for your water.
drowsiness, such as tranquilizers, antihistamines,
or anticoagulants, should not use spas or hot tubs.
Automatic Chlorinators
AA CAUTION: Propane gas is heavier than air and will and Chemical Feeders
settle on the ground. Since propane can accumulate in All chemicals must be introduced and completely diluted
confined areas, extra care should be exercised when into the pool or spa water before being circulated through
lighting propane heaters. the heater. Do not place sanitizing chemicals in the
skimmer. High chemical concentrations will result when
2. WATER CHEMISTRY the pump is not running (e.g. overnight).

NOTE: Corrosive water voids all warranties.

Chlorinators must feed downstream of the heater and
have an anti-siphoning device to prevent chemical backup
Chemical imbalance can cause severe damage to your into the heater when the pump is shut off.
heater and associated equipment. Maintain your water
See "Plumbing Diagrams" on page 21.
chemistry according to Table A. If the mineral content
and dissolved solids in the water become too high, scale NOTE: High chemical concentrates from feeders and
forms inside the heat exchanger tubes, reducing heater chlorinators that are out of adjustment will cause rapid
efficiency and damaging the heater. If the pH drops below corrosion to the heat exchanger. Such damage is not
7.2, this will cause corrosion of the heat exchanger and covered under the warranty.

Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool and Spa Types
Water Temperature 68-88°F (20-31°C) 89-104°F (31-40°C) 68-104°F (20-40°C)
pH 7.3-7.4 7.3-7.4 7.6-7.8
Total Alkalinity (ppm) 120-150 120-150 80-120
Calcium Hardness (ppm) 200-300 150-200 200-400
Salt (ppm) 4500 Maximum 4500 Maximum 4500 Maximum
Free Chlorine (ppm)* 2-3 2-3 2-3
Total Dissolved Solids (ppm) 3000 Maximum** 3000 Maximum** 3000 Maximum**
*Free Chlorine MUST NOT EXCEED 5 ppm!
**In saltwater chlorinated pools, the total TDS can be as high as 6000 ppm.

Table A. Pool Water Chemistry

5
3. BEFORE INSTALLATION Model Identification Number
The model number of a boiler can be found on the Sales
Receiving equipment Order and the boiler's rating plate. The example below
The manufacturer recommends that this manual be identifies what the characters of the model number
reviewed thoroughly before installing the pool/spa heater. If represent.
there are any questions that this manual does not answer,
B - _ 206A - E N - C # 50
please contact the factory or your local representative.
# Burner orifice size
On receipt of your equipment visually check for external C Copper tubes
damage to the carton. If the carton is damaged, a note X Cupronickel tubes
should be made on the Bill of Lading when signing for
the equipment. Remove the heater from the carton. If it is N Natural gas
damaged, report the damage to the carrier immediately. P Propane
Save the carton.
E Electronic ignition (digital units)
These items are shipped inside a box in the carton with M Millivolt ignition, with standing
the heater: pilot
Standard Unit (POLYMER HEADERS)
206A input 199,500 BTUH (58.4 kw)
1. “Pagoda” top 266A input 266,000 BTUH (77.9 kw)
336A input 332,500 BTUH (97.4 kw)
2. 2" CPVC union half with "O" rings (2) 406A input 399,000 BTUH (116.9 kw)

3. Plastic pipe finish flange for gas line

_ Brand designation letter
4. Bonding lug with mounting screw (Digital) models
only) B Bronze headers †
P Polymer headers † †
ASME Unit (BRASS HEADERS)
1. “Pagoda” top † For commercial installations, ASME-Certified.
† † Units with polymer headers do not meet building code requirements for
2. 2" CPVC union half with "O" rings (2) commercial installations. Consult local code authorities before using any
unit with polymer headers in a commercial environment.
3. Plastic pipe finish flange for gas line
4. Bonding lug with mounting screw (Digital models When ordering parts, you must specify the model and
only) serial numbers of the heater. See Figure 2 for location
5. Pressure Relief Valve (PRV) of serial number. When ordering under warranty
conditions, you must also specify date of installation.
6. Protek Shield™ Adapter with Protek Shield Assy,
O-ring and wing nut Model:

THE MODEL AND SERIAL NO. CAN

B-R 406A EN-C #50
ALSO BE FOUND INSIDE THE
BEZEL ABOVE THE DISPLAY
BRASS
Fuel: Ignition

NAT IID
Item Number:

017374
Serial Number:

1912010101
Note:
Serial No.

Figure 2. Model and Serial Number

Rating and certifications

These heaters are design-certified and tested under the
latest requirements of the ANSI Z21.56 / CSA 4.7 Standard
MODEL AND SERIAL
NO. LOCATED ON
F10640-1 for Gas-Fired Pool Heaters. All heaters can be used either
RATING PLATE
indoor or outdoors when appropiate venting is installed.
Figure 1. Rating Plate Location
The appropriate top designated for each type of use is
required. If necessary, the top can be changed at a later
Be sure that you receive the number of packages indicated date to change from outdoor to indoor or vice versa.
on the Bill of Lading.
6
All brass header units have heat exchangers which are
AA WARNING: Improper installation, adjustment,
ASME-certified (BPV Section IV part HLW) and are
alteration, service or maintenance may damage the
registered with National Board. equipment, create a hazard resulting in asphyxiation,
explosion or fire, and will void the warranty.
Elevation
NOTE: The heater should not be located in an area
Rated inputs are suitable for up to 2,000 ft (610 m) where possible water leakage will result in damage to
elevation. For elevations above 2,000 ft (610 m), reduce the area adjacent to the heater or to the structure. When
input 4% for each 1,000 ft (305 m) above sea level, as such locations cannot be avoided, it is recommended
high elevation reduces combustion performance. that a suitable drain pan, with adequate drainage, be
installed under the heater. The pan must not restrict
combustion air flow.
Ambient Temperature Rating
Heater Components Installation Codes
Millivolt Heater with Honeywell Gas Valve 32°F to 175°F Installation must be in accordance with local codes, or,
(0°C to 79°C) in the absence of local codes, with the latest edition of
Millivolt Heater with Robertshaw Gas Valve 0°F to 175°F the National Fuel Gas Code, ANSI Z223.1/NFPA54 and
(-18°C to 79°C) National Electrical Code, ANSI/NFPA 70, and for Canada,
the latest edition of CAN/CSA-B149 Installation Codes,
Electronic Ignition Heater* -32°F to 175°F (-35°C to 79°C) and Canadian Electrical Code, CSA C22.1 Part 1 and
*Requires 120 or 240VAC, 1 Ph, 60 Hz Power Supply Part 2.

4. INSTALLATION Clearances
AA WARNING: This unit contains refractory ceramic All Heaters
fiber (RCF) insulation in the combustion chamber. RCF,
as manufactured, does not contain respirable crystalline For indoor and outdoor clearances from combustible
silica. However, following sustained exposure to very surfaces, see the chart below.
high temperatures (>2192°F), the RCF can transform
into crystalline silica (cristabolite). The International Location Indoor Installation
Agency for Research on Cancer (IARC) has classified
the inhalation of crystalline silica (cristabolite) as Top * 30" (762 mm) Drafthood
carcinogenic to humans. Front Alcove (Open)
When removing the burners or heat exchangers, take Vent 6" (152 mm)
precautions to avoid creating airborne dust and avoid Floor ** 0"
inhaling airborne fibers. When cleaning spills, use wet
sweeping or High Efficiency Particulate Air (HEPA) Back 6" (152 mm)
filtered vacuum to minimize airborne dust. Use feasible Right Side 12" (305 mm) Water Side
engineering controls such as local exhaust ventilation Left Side 6" (152 mm) Opposite Water Side
or dust collecting systems to minimize airborne dust.
Wear appropriate personal protective equipment
including gloves, safety glasses with side shields, and Location Outdoor Installation
appropriate NIOSH certified respiratory protection, Top * Unobstructed (Outdoor Stack)
to avoid inhalation of airborne dust and airborne fiber
particles. Top *** 36" (914 mm) (Stackless Top)
Floor 0"
IMPORTANT NOTICE: These instructions are intended Back 6" (152 mm)
only for the use by qualified personnel, specifically
trained and experienced in the installation of this type Right Side 12" (305 mm) Water Side
of heating equipment and related system components. Left Side 6" (152 mm) Opposite Water Side
Installation and service personnel may be required by
* Clearance from top of vent terminal
some states to be licensed. If your state is such, be sure ** Do not install on carpeting
your contractor bears the appropriate license. Persons *** Clearance from top of heater
not qualified shall not attempt to fix the equipment nor
attempt repairs according to these instructions. Table B. Minimum Clearances from Combustible Surfaces

7
When installed according to the listed minimum clearances Clearances less than these may require removal of the
from combustible construction, the pool heater can still be heater to service either the heat exchanger or the burner
serviced without removing permanent construction around tray. In either case, the heater must be installed in a
the heater. manner that will enable the heater to be serviced without
However for ease of servicing, we recommend a clearance removing any structure around the heater.
of at least 24" (610 mm) in the front, and at least 18" (457
mm) on the water connection side. This will enable the Flooring
heater to be serviced in its installed location, that is, without
movement or removal of the heater. This heater can be installed on combustible flooring.
The combustible clearances listed can be reduced by
Distance protecting the exposed combustible surfaces as shown in
Description Location
in. (mm) Table C.
Back 9 (229)
Right 9 (229)
a. 3-1/2" (89 mm) thick
masonry walls without
Left 9 (229) Outdoor Heater Installation
Vent 5 (127)
ventilated air space These heaters are design-certified for outdoor installation,
Indoor Top 39 (991)
Outdoor Top Unobstructed when equipped with the approved tops designated for
Back 6 (152) outdoor use.
b. 1/2" (13 mm)insulation Right 6 (152)
board over 1" (25 mm) Left 6 (152) AA WARNING: The heater shall not be located in an
glass fiber or mineral Vent 3 (76) area where water sprinklers, or other devices, may cause
wool batts Indoor Top 30 (762) water to spray through the cabinet louvers and into the
Outdoor Top Unobstructed heater. This could cause internal rusting or damage
c. 0.024 sheet metal over Back 4 (102) electrical components, and void the warranty.
1" (25 mm) glass fiber Right 4 (102)
or mineral wool batts Left 4 (102) AA WARNING: Do not install within 3' (0.9 m) of a heat
reinforced with wire on Vent 3 (76) pump or an outdoor condensing unit. Strong air intake
rear face with ventilated Indoor Top 24 (610) from this type of equipment can disturb the combustion
air space Outdoor Top Unobstructed process and cause damage or personal injury.
Back 6 (152)
Right 6 (152)
d. 3-1/2" (89 mm) thick
Left 6 (152) PAGODA TOP
masonry wall with INSTALLATION
Vent 6 (152)
ventilated air space
Indoor Top 39 (991)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
e. 0.024 sheet metal with Left 4 (102)
ventilated air space Vent 2 (51)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
f. 1/2" (13 mm) thick
Left 4 (102)
insulation board with
Vent 3 (76)
ventilated air space
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
g. 0.024 sheet metal with Right 4 (102)
ventilated air space over Left 4 (102)
0.024 sheet metal with Vent 3 (76)
ventilated air space. Indoor Top 24 (610) F10646-1

Outdoor Top Unobstructed

Figure 3. Heater with Outdoor Stackless Top
Back 4 (102)
h. 1" (25 mm) glass fiber
Right 4 (102)
or mineral wool batts
Left 4 (102)
sandwiched between two
Vent 3 (76)
sheets 0.024 sheet metal
Indoor Top 24 (610)
with ventilated air space
Outdoor Top Unobstructed
Derived from National Fuel Gas Code, Table 10.2.3

Table C. Reduction of Clearances to Protected Surfaces

8
 For installations in Florida and Texas, that must comply
with the Florida or Texas Building Code, follow the directions
shown in Figure 6 for the installation of hurricane tie-down
brackets for all models.
4' (1.2 m)
Minimum
Indoor Heater Installation
4' (1.2 m)
Minimum The heater is also design-certified for indoor installation
4' (1.2 m) when equipped with the approved drafthood.
Minimum
For Canada, indoor installation is restricted to an enclosure
3' (0.9 m) that is not occupied and does not directly communicate
Minimum
1' (0.3 m)
with an occupied area. Refer to the latest edition of CAN/
10' (3 m)
Minimum Minimum CSA-B149 for specific requirements. Locate heater as
close as is practical to a chimney or gas vent. Heater
must always be vented to the outside. See section "Vent
Forced Air Inlet Piping" on page 14 for details. Minimum allowable
space is shown on the nameplate.
Figure 4. Minimum Distances to Building Openings from
Where Flue Products Exit the Boiler WARNING: Indoor heaters require a drafthood that
AA
Heaters must not be installed under an overhang of less must be connected to a vent pipe and properly vented to
than 3' (0.9 m) from the top of the heater. Three sides the outside. Failure to follow this procedure can cause
must be open in the area under the overhang. Roof water fire or fatal carbon monoxide poisoning.
drainage must be diverted away from the heaters installed
under overhangs with the use of gutters.
For U.S. installations, the point from where the flue
products exit the heater must be a minimum of 4' (1.2 m)
below, 4' (1.2 m) horizontally from, or 1' (0.3 m) above
any door, window or gravity inlet into any building. The
top surface of the heater shall be at least 3' (0.9 m) above
any forced air inlet, or intake ducts located within 10' (3 m)
horizontally.
For Canadian installations, pool heaters shall not be
installed with the top of the vent assembly within 10' (3 m)
below, or to either side, of any opening into the building.
Refer to the latest revisions of CAN/CSA-B149.
A minimum of 6' (1.8 m) is required from the heater to an
inside corner wall for proper outdoor venting.

Pagoda Top Installation

1. Insert tabs into keyhole (4 places). See Figure 5,
detail A.
2. Snap tabs into keyholes so as not to pull out. See
Figure 5, detail B.

DETAIL A DETAIL B
OUTDOOR TOP
(SHIPPED LOOSE WITH HEATER)

Figure 5. Outdoor Top Installation

9
 FLORIDA AND TEXAS BUILDING CODES
WIND SPEED = 150 MPH, 3 SECOND GUST
EXPOSURE = C

B
Model
in. (mm)
B
206A 20 (508)
266A 23 (584)
336A 26 (660)
406A 29 (737)
38"
(965 mm)

F10648

28"
2" x 6" x 1/8" Pallet (711 mm)
Anchor Bracket (4 Total) (Kit# 011636)

3" (76 mm)

Min. Conc.
Pad by others

1/4" x 1-3/4" S.S.

Tapcon Bolt and Washer (Field-Supplied)
NOTE: Use hole closest to unit with
washer overlapping edge of unit. Min. Edge
Distance
6"
(152 mm)

3" (76 mm)

Min. Conc.
Min. Edge
Pad by others
Distance
6"
(152 mm) HOT

F10646-2

(1)–1/4" x 1-3/4" S.S. (1)–1/4" x 1-3/4" S.S.

Tapcon Bolt & Washer (Field-Supplied) Tapcon Bolt & Washer (Field-Supplied)
Ea. Pallet Anchor Bracket Ea. Pallet Anchor Bracket
Use hole closest to unit (4 total) Use hole closest to unit (4 total)

Figure 6. Hurricane Tie-Down Bracket Installation

10
Outdoor and Indoor Stacks Combustion and Ventilation Air
The outdoor and indoor stacks are optional equipment and
do not come standard with the heater. Refer to installation Indoor Units Only
instructions inside box for instructions on how to install The heater must have both combustion and ventilation air.
outdoor/indoor stack. The minimum requirements are listed in the latest edition of the
National Fuel Gas Code (U.S. ANSI Z223.1 or Canada CAN/
Model Outdoor Stack Indoor Stack CSA-B149) and any local codes that may have jurisdiction.
The most common approach is the "2-opening" method, with
206A 009834 009838 combustion air opening no more than 12" from the floor and
the ventilation opening no more than 12" from the ceiling. For
266A 009835 009839
opening sizes using this method, see below.
336A 009836 009840
406A 009837 009841 All Air from Inside the Building:
Table D. Outdoor and Indoor Stack Kit Number Each opening shall have a minimum net free area as noted:
Model Sq. in. (m2)
OUTDOOR STACK KIT
206A 200 (0.13)
(1) Outdoor, painted
266A 266 (0.17)
(1) Adapter plate
336A 333 (0.21)
(3) Mounting brackets (clips)
406A 399 (0.26)
(1) Top panel cover
(2) 1-foot sections of metal tape Table E. Opening Minimum Net Free Requirements -
Indoor Air
(3) Screws
(1) Instructions Clips
All Air from Outdoors:
When air is supplied directly from outside the building, each
opening shall have a minimum net free area as noted:
Typical Screened Typical Screened
Unrestricted
or Louvered and Louvered
Model Opening
Opening Opening
sq. in.­(m2)
Figure 7. Outdoor Stack Kit Components sq. in. (m2) sq. in. (m2)

206A 50 (0.03) 75 (0.05) 100 (0.06)

NOTE: The outdoor drafthood kit does not require any
additional vent pipe for proper operation. This drafthood 266A 67 (0.04) 101 (0.06) 134 (0.09)
functions as the vent termination. 336A 84 (0.05) 126 (0.08) 168 (0.11)
INDOOR STACK KIT 406A 100 (0.06) 150 (0.1) 200 (0.13)
(1) Drafthood, unpainted
Table F. Opening Minimum Net Free Requirements -
(1) Adapter plate Outdoor Air
(3) Mounting brackets (clips)
AACAUTION: Combustion air must not be contaminated
(3) Screws by corrosive chemical fumes which can damage the
heater. Such damage will not be covered by the warranty.
(1) Instructions

Clips

Figure 8. Indoor Stack Kit Components

11
Specifications and Dimensions Amp Draw
120 VAC, 1Ph, 60Hz 240 VAC, 1Ph, 60Hz
B
4 2

C
" CL
Indoor Flue 10"
Drafthood
(254 mm)
D 4-3/8"
J* 8-7/8"
(111 mm)
(225 mm)
(3-3/8" ASME)
6-5/8" ASME
(86 mm ASME)
(168 mm ASME)

40"
38” (1016 mm)
(965 mm) Stackless
32-11/16" Outdoor Top
(830 mm)
26-5/8”
Electrical
(676 mm)
28-5/8” ASME
Connection
(727 mm ASME)

13-1/4”
(337 mm)
gas
connection

F10646 28"
A
(711 mm) F10646-4

Figure 9. Front View Figure 10. Side View

*Note: For outdoor stack, use J dimension in the following tables for appropriate size plus 6 inches (152 mm).

Shipping Weights
Residential - Copper Heat Exchanger
lbs (kg)

BTUH (A) (B) (C) Standard

(J)* Gas Water Indoor
Heater Input Cabinet Flue Indoor (D) Heater
Min. Conn. Conn. Draft-
Mode (000) Width Dia. Drafthood in. (mm) w/Stackless
in. (mm) in. in. hood
(kw) in. (mm) in. (mm) in. (mm) Top

199.5 20 6 61-5/8 10.0 11-3/4 187 14

206A 3/4 2
(58.4) (508) (152) (1565) (254) (298) (85) (6.4)

266.0 23 7 62 11.5 11 210 16

266A 3/4 2
(77.9) (584) (178) (1575) (292) (279) (95) (7.3)

332.5 26 8 63 13 10-5/8 230 19

336A 3/4 2
(97.4) (660) (203) (1600) (330) (270) (104) (8.6)

399 29 9 64-9/16 14.5 12-1/8 249 21

406A 3/4 2
(116.9) (737) (229) (1640) (368) (309) (113) (9.5)

Table G. Residential - Copper Heater Specifications and Dimensions

12
 Shipping Weights
Residential - Cupronickel Heat Exchanger
lbs (kg)

BTUH (A) (B) (C) (J)* Standard

(D) Gas Water Indoor
Heater Input Cabinet Flue Indoor Min. Heater
in. Conn. Conn. Draft-
Mode (000) Width Dia. Drafthood in. w/Stackless
(mm) in. in. hood
(kw) in. (mm) in. (mm) in. (mm) (mm) Top

180.0 20 6 61-5/8 10.0 11-3/4 187 14

P-R206A-EN-X 3/4 2
(52.7) (508) (152) (1565) (254) (298) (85) (6.4)

240.0 23 7 62 11.5 11 210 16

P-R266A-EN-X 3/4 2
(70.3) (584) (178) (1575) (292) (279) (95) (7.3)

300.0 26 8 63 13 10-5/8 230 19

P-R336A-EN-X 3/4 2
(87.9) (660) (203) (1600) (330) (270) (104) (8.6)

360.0 29 9 64-9/16 14.5 12-1/8 249 21

P-R406A-EN-X 3/4 2
(105.5) (737) (229) (1640) (368) (309) (113) (9.5)

Ta b l e H . Residential - Cupronickel Heater Specification and Dimensions

Shipping Weights
Commercial - ASME Copper or Cupronickel Heat Exchanger
lbs (kg)

BTUH (A) (B) (C) (J)* Standard

(D) Gas Water Indoor
Heater Input Cabinet Flue Indoor Min. Heater
in. Conn. Conn. Draft-
Mode (000) Width Dia. Drafthood in. w/Stackless
(mm) in. in. hood
(kw) in. (mm) in. (mm) in. (mm) (mm) Top

199.5 20 6 61-5/8 10.0 11-3/4 206 14

P-R206A-EN-(C or X) 3/4 2
(58.4) (508) (152) (1565) (254) (298) (94) (6.4)

266.0 23 7 62 11.5 11 229 16

P-R266A-EN-(C or X) 3/4 2
(77.9) (584) (178) (1575) (292) (279) (104) (7.3)

332.5 26 8 63 13 10-5/8 249 19

P-R336A-EN-(C or X) 3/4 2
(97.4) (660) (203) (1600) (330) (270) (113) (8.6)

399 29 9 64-9/16 14.5 12-1/8 268 21

P-R406A-EN-(C or X) 3/4 2
(116.9) (737) (229) (1640) (368) (309) (122) (9.5)

Ta b l e I . Commercial - Heater Specifications and Dimensions

13
 Flue materials must be certified to CATEGORY I or
Vent Piping better. Type “B” double-wall or equivalent vent pipe is
WARNING: Indoor heaters require a drafthood that recommended. A draft of -0.01" to -0.08" WC must be
AA
must be connected to a vent pipe and properly vented to maintained. However single-wall metal vent pipe may be
the outside. Failure to follow this procedure can cause used as specified in the latest edition of the National Flue
fire or fatal carbon monoxide poisoning. Gas Code, ANSI Z223.1 (Canada - CAN/CSA-B149).

When properly installed outdoors, only the outdoor

stackless top (provided) is required. If installed indoors, D-2 Power Vent Kit
a drafthood is required, connected to a CATEGORY Another option for an installation that requires horizontal
I (a heater that operates with a non-positive vent static runs is the D-2 power vent kit option.
pressure and a vent gas temperature that avoids excessive
condensate production in the vent.) vent per the National Model 120 VAC P/N 240 VAC P/N
Fuel Gas Code and local requirements.
206A 010744 009832
Vent piping the same size as the drafthood outlet is 266A 010744 009832
recommended, however, when the total vent height is at
least 10 ft (3 m) (drafthood relief opening to vent terminal), 336A 010745 009833
the vent pipe size may be reduced by no more than one 406A 010745 009833
(1) size as specified in Chapter 13 of the National Fuel
Gas Code, ANSI Z223.1 (Canada - CAN/CSA-B149). Table J. Power Vent Kit Part Numbers

As much as possible, avoid long horizontal runs of vent

pipe and too many elbows. If installation requires horizontal NOTE: The D-2 Power Vent operates with a positive
vent static pressure and with a vent gas temperature
runs, the vent pipe must have a minimum of 1/4 in. per ft
that prevents excessive condensate production in the
rise (20.8 mm per meter rise) and should be supported at vent, and as such, is a CATEGORY III appliance. For
not more than five foot (1.5 m) intervals. more information consult the D-2 Power Vent manual
6000.57.1. CATEGORY I vent material such as B-vent
Plumber's tape, criss-crossed, will serve to space both must not be used under CATEGORY III conditions.
horizontal and vertical piping. Gas vents supported only
by the flashing and extending above the roof more than 5
ft (1.5 m) should be securely guyed or braced to withstand
snow and wind loads. We recommend use of insulated
vent pipe spacers through the roof and walls.

For protection against rain or blockage by snow, the vent

pipe must terminate with a vent cap which complies with
the local codes or, in the absence of such codes, to the
latest edition of the National Fuel Gas Code, ANSI Z223.1
(Canada - CAN/CSA-B149).
The discharge opening must be a minimum of 2' (0.6
m) vertically from the roof surface and at least 2' (0.6 m) Figure 11. D-2 Power Vent Option
higher than any part of the building within 8' (2.4 m). Vent
stack shall be at least 5' (1.5 m) in vertical height above The power vent system is a fan-assisted combustion
the drafthood outlet. The vent cap location shall have a system designed for application to models 206A-406A.
minimum clearance of 4' (1.2 m) horizontally from, and in The power vent system, when installed as directed, is
no case below, unless a 4' (1.2 m) horizontal distance is capable of operating in applications such as through-the-
maintained, from electric meters, gas meters, regulators wall venting with reduced horizontal and vertical vent pipe
and relief equipment. sizes in new and current installations. The unit is factory-
The weight of the vent stack or chimney must not rest on the wired for 240 VAC, with capability of field-rewiring for 120
heater drafthood. Support must be provided in compliance VAC.
with applicable codes. The heater top and drafthood must For more information consult the D-2 Power Vent manual,
be readily removable for maintenance and inspection. (Catalog No. 6000.57.1).
Vent pipe should be adequately supported to maintain
proper clearances from combustible construction.

14
 Gas piping must have a sediment trap ahead of the
8' (2.4 m) heater gas controls, and a manual shut-off valve located
OR LESS VENT CAP outside the heater jacket. All gas piping should be tested
2' MIN after installation in accordance with local codes.
(0.6 m)
AA CAUTION: The heater and its manual shut-off valve
must be disconnected from the gas supply during any
2' MIN pressure testing of that system at test pressures in
(0.6 m) excess of 1/2 psi (3.45 kPa). Dissipate test pressure in
the gas supply line before reconnecting the heater and
its manual shut off valve to gas supply line. FAILURE
TO FOLLOW THIS PROCEDURE MAY DAMAGE THE
5' MIN GAS VALVE. OVER PRESSURIZED GAS VALVES ARE
(1.5 m) NOT COVERED BY WARRANTY. The heater and its gas
VENT PIPE connections shall be leak tested before placing the
appliance in operation. Use soapy water for leak test. DO
NOT use open flame.

Supply Pressure
DRAFT HOOD
AA CAUTION: Do not use teflon tape on gas line pipe
thread. Only sealant tape or a pipe compound rated for
use with natural and propane gases is recommended.
Apply sparingly only on male pipe ends, leaving the two
end threads bare.

HEATER A minimum of 6 in. WC and a maximum of 10.5 in. WC

upstream pressure under load and no-load conditions
must be provided for natural gas. A minimum of 12 in. WC
and a maximum of 13 in. WC are required for propane
gas under load and no-load conditions.
Figure 12. Venting Clearances
Gas Pressure Regulator
NOTE: With venting application of two or more heaters,
contact the factory. The gas pressure regulator is preset at 4.0 in. WC for
natural gas, and 10.5 in. WC. for propane gas. The
pressure at the gas valve, taken with a manometer, should
be about 4.0 in. WC natural gas and 10.5 in. WC propane
gas. If an adjustment is needed, remove seal and turn
Gas Supply Connections adjustment screw clockwise to increase pressure or
counter-clockwise to decrease pressure.
HEATER JACKET
GAS INLET
MANUAL SHUT-OFF VALVE
MANUAL
(Field supplied) SHUT-OFF
GAS VALVE
VALVE
FINISH FLANGE

3" MIN
(76 mm)
Typical UNION
(Field supplied)
UNION
SEDIMENT TRAP
(Field supplied)

Figure 13. Gas Supply Plumbing F10640-2

Figure 14. Manual Shut-Off Valve Installation

15
Gas Pressure Adjustment Locations

Millivolt Gas Valve

GAS
PRESSURE
ADJUSTMENT

Figure 15. Robertshaw 7000 (Heater Model 206A - 406A)

Electronic Ignition Gas Valves

GAS PRESSURE ADJUSTMENT GAS PRESSURE ADJUSTMENT

Figure 16. Honeywell VR8304 (Heater Models 206A - 406A) Figure 18. Robertshaw 7000 BDER (Heater Models 266A -
336A)
GAS
GAS PRESSURE ADJUSTMENT
PRESSURE
ADJUSTMENT

Figure 19. Robertshaw 7000 DERHC (Heater Models 406A)

Figure 17. Robertshaw 7200 (Heater Models 206A)

16
Pipe Sizing for Gas Connection
These capacities shown below based on using SCH
40 black iron pipe. For capacities using other materials,
consult local code.

Maximum Equivalent Pipe Length (ft) (m)

Natural Gas 1000 BTU/FT3 0.60

Specific Gravity @ 0.5 in WC Pressure Drop

Propane Gas 2500 BTU/FT3 1.53

Specific Gravity @ 0.5 in WC Pressure Drop
3/4" 1" 1-1/4" 1-1/2"
Model
N P N P N P N P F10637-1

25 60 90 215 360
206A (7.6) (18.3) (27.4) (65.5) (109.7) Figure 21. Brass Header (ASME) Water Flow
15 35 50 125 210 480 445
266A (4.6) (10.7) (15.2) (38.1) (64.0) (146.3) (135.6)

10 20 30 80 140 320 290

336A (3.0) (6.1) (9.1) (24.4) (42.7) (97.5) (88.4)

15 20 55 95 225 215 480

406A *
(4.6) (6.1) (16.8) (29.0) (68.6) (65.5) (146.3)
* A 3/4" gas line can be used for up to 5' (1.5 m) maximum length from the gas
valve in addition to the sediment trap.
Pressure Drop (Ft. of Head) (m of Head)
Table M. Gas Pipe Sizing Flow GPM
(lpm)
206A 266A 336A 406A
Flow Rates 20 (75) 4.0 (1.2)
Model Pipe Size Min. GPM (lpm) Max. GPM (lpm) 25 (95) 4.0 (1.2) 4.6 (1.4)
30 (113) 4.0 (1.2) 5.2 (1.6)
206A 1-1/4"–1-1/2"–2" 20 (75) 125 (473)
35(132) 4.0 (1.2) 5.8 (1.8) 5.2 (1.6)
266A 1-1/4"–1-1/2"–2" 25 (95) 125 (473) 40 (151) 4.6 (1.4) 5.8 (1.8) 5.2 (1.6) 5.2 (1.6)
50 (189) 4.6 (1.4) 6.3 (1.9) 6.9 (2.1) 6.9 (2.1)
336A 1-1/4"–1-1/2"–2" 35 (132) 125 (473) 60 (227) 4.6 (1.4) 6.9 (2.1) 6.9 (2.1) 6.9 (2.1)
70 (265) 4.6 (1.4) 8.1 (2.5) 9.2 (2.8) 9.2 (2.8)
406A 1-1/4"–1-1/2"–2" 40 (151) 125 (473)
80 (303) 4.6 (1.4) 9.2 (2.8) 9.8 (3.0) 9.8 (3.0)
* When flow rates exceed maximum GPM an external auxiliary bypass valve is
required. See external bypass valve section for details.
90 (340) 6.9 (2.1) 10.4 (3.2) 10.4 (3.2) 10.4 (3.2)
100 (378) 8.1 (2.5) 11.0 (3.4) 12.1 (3.7) 12.1 (3.7)
Table N. Min/Max Flow Rates
110 (416) 10.4 (3.2) 11.5 (3.5) 13.3 (4.0) 13.3 (4.0)
120 (454) 11.0 (3.4) 12.7 (3.9) 17.9 (5.4) 17.9 (5.4)
125 (473) 11.5 (3.5) 13.8 (4.2) 20.2 (6.2) 20.2 (6.2)

Table K. Polymer Heat Exchanger Pressure Drop -

Residential Models

F10638-1

Figure 20. Polymer Header Water Flow

17
 2-inch unions, make sure the O-rings are properly seated
Pressure Drop (Ft. of Head) (m of Head) in the grooves. Use Aqualube or equivalent non-petroleum-
Flow GPM
(lpm)
206A 266A 336A 406A based lubricant on the O-ring. Hand tighten the unions.
Glue PVC piping directly to the unions.
20 (75) TBD
O-RING
30 (113) TBD TBD HEADER FLANGE
(CPVC)
40 (151) TBD TBD TBD TBD
HEADER FLANGE NUT
50 (189) TBD TBD TBD TBD (CPVC)

60 (227) TBD TBD TBD TBD

70 (265) TBD TBD TBD TBD

80 (303) TBD TBD TBD TBD HEADER

90 (340) TBD TBD TBD TBD

PLUMBING
PROTEK SHIELD
100 (378) TBD TBD TBD TBD ASSEMBLY F10664

Table L. Brass Heat Exchanger Pressure Drop - ASME Figure 23. Inlet/Outlet Header – Brass
Models
NOTE: Some jurisdictions require the addition of a flow
NOTE: Table capacity is based on schedule 40 black switch on ASME installations. Kit # TBD can be ordered
iron pipe. For capacity using other material, consult that will allow a standard ASME unit to comply with the
local codes. code requirements.

ProTek Shield Assembly

Polymer Headers (Residential Models) This heater is equipped with a ProTek Shield Assembly
Before attaching the 2-inch unions to the inlet/outlet header, (located under the inlet connection on polymer headers
make sure the O-rings are properly seated in the grooves. and in the ProTek Shield Adapter assembly shipped loose
Use Aqualube or equivalent non-petroleum-based lubricant in the accessory carton for field installation on brass ASME
on the O-ring. Hand tighten the unions. Glue PVC piping headers.
directly to the unions. This component provides protection to the heat exchanger
against galvanic corrosion, when properly bonded to the
O-RING
heat exchanger. It should be replaced when the weight of
the ProTek Shield is reduced to about 40% of the original
HEADER FLANGE weight (1.46 #).
(CPVC)

PLUMBING

PROTEK
SHIELD
ASSY
HEADER FLANGE NUT
(CPVC)
F10641 F10715

Figure 22. Inlet/Outlet Header – Polymer Figure 24. ProTek Shield Assembly
High temperature CPVC header flanges and header
AA CAUTION: STOP pool pump before attempting to
flange nuts are provided. If there is any possibility of back- remove ProTek Shield Assy. Failure to do so may result
siphoning when the pump stops, it is suggested that a in damage to ProTek Shield Assy, loss of pool water, or
check valve (or valves) also be installed in the system. personal injury.

Brass Headers (ASME Models) CAUTION: Do not use tools to remove (twist) the
ProTek Shield Assy or the wing nut on the stud of the
Heater must be located so that any water leaks will not ProTek Shield Assy. Non-warrantable damage may
damage the structure of adjacent area. Before attaching occur.
the ProTek Shield Adapter to the outlet connection and the

18
Follow the steps below to replace the ProTek Shield Assy:
Internal Automatic Bypass Valve
1. Shut off the pool pump and bleed pressure from the
In addition to the Unitherm Governor, a built-in automatic
system.
bypass valve is provided in the In/Out header. While the
2. Close isolation valves to minimize pool/spa water Unitherm Governor responds to the changes in water
loss. temperature in the heater, the internal bypass valve
3. Remove wing nut from bottom stud on ProTek Shield automatically responds to changes in water pressure in the
Assy. piping system. Proper amount of water flow is maintained
through the heater under varying pressures dictated by the
4. Remove bonding wire ring terminal from stud.
conditions of the pump and filter.
5. Rotate ProTek Shield Assy clockwise (by hand) to
unscrew it from the assembly. UG/BYPASS ASSY

6. Inspect/replace as necessary and reverse above

procedure to reinstall. Hand tighten only! Do not use
tools.
NOTE: Make sure the O-ring is properly seated in the
BYPASS DISC
O-ring groove before installation.
SPRING
"RED" - 206/266
Unitherm Governor Operation "SILVER" - 336/406

AA CAUTION: The patented Unitherm Governor is F10642-1

a thermostatic mixing valve specifically designed to

maintain constant heater internal temperature between Figure 27. Internal Automatic Bypass Valve - Brass
105°F (41°C) and 115°F (46°C) despite continually NOTE: The Unitherm Governor and Bypass Valve Assy
changing flow rates from the filter and changing pool are not individually replaced components on ASME
temperatures. This narrow range is needed to prevent units. If either needs to be replaced, the entire UG/
damaging condensation on the burners which will Bypass assy must be replaced. The "red" spring is used
occur if the heater runs for any length of time below on models 206/266 and the "silver" spring is used on
100°F (38°C). It is also needed to inhibit scale formation models 336/406.
in the tubes by maintaining temperatures well below
accelerated scaling temperatures.
External Auxiliary Bypass Valve
UG PLUG
Where Required - An auxiliary bypass valve should be
UNITHERM GOVERNOR used when flow rates exceed 125 GPM (473 lpm). Usually
a high-performance pump size larger than two horsepower
GASKET
will exceed this flow rate. This valve is required to
complement the function of the automatic bypass valve,
particularly when starting the heater in winter or early
F10725 spring when the spa or pool temperature is below 50°F
(10°C). It also serves to eliminate needless pressure drop
through the heater and accompanying reduction in the flow
rate to the spa jets, etc.
Figure 25. Unitherm Governor - Polymer
FROM HEATER TO HEATER
UG/BYPASS ASSY

FULL PORT
BALL VALVE
OR GLOBE
VALVE

UNITHERM TO POOL/SPA FROM POOL/SPA

GOVERNOR
BYPASS VALVE
F10642-2
Do not use gate valve.
Figure 26. Unitherm Governor - Brass Figure 28. Auxiliary Bypass Valve

19
 The heater requires water flow and positive pressure to
Auxiliary Bypass Valve Adjustment fire and operate properly. It must therefore be installed
To set bypass - With clean filter, adjustment is made by downstream of the discharge side of the filter pump.
feeling the inlet and outlet pipes at the heater. Outlet pipes See Figure 32 and Figure 33.
should be slightly warmer than inlet and comfortable to the A typical installation is plumbed as follows:
touch. If pipe is hot, close bypass; if cold, open bypass.
1. The inlet side of the filter is plumbed directly to the
discharge side of the filter pump;
Pressure Relief Valve Installation 2. The outlet side of the filter is then plumbed to the inlet
To conform to local building codes, it may be necessary of the heater; and
to install a pressure relief valve. A 3/4" pressure relief
3. The outlet of the heater is plumbed to the return line
valve, having a capacity equal to the BTU output of the
to the pool or spa. The pump, filter and heater are
model to be installed, is recommended for this heater. The
thus plumbed in series (Salt generators and chemical
maximum acceptable pressure relief valve setting is 125
feeders must be downstream of the pool heater).
psi (862 kPa).
Plumbing from the heater back to the pool or spa must not
A 3/4" NPT connection is provided in the Polymer header
have any valves or restriction that could prevent flow when
for installation of a pressure relief valve. The valve shall be
the pump is operating.
installed in a vertical position. Do not over-tighten. Install
pressure relief valve hand tight plus 1/2 turn.
PRESSURE RELIEF VALVE AA CAUTION: An additional source of heated water,
PRV DISCHARGE
e.g. a solar system, must be connected to the main line
CONNECTION ahead of the heater inlet pipe in order for it to act as
the primary heat source. If the primary system provides
adequate heat to maintain set-point, the heater will not
fire. Be advised that the control panel will then display
sensed water temperatures downstream of the primary
heating system, rather than the temperature of the water
exiting the pool.

IN/OUT HEADER
F10662
Heater must be located so that any water leaks will not
damage the structure of adjacent area. PVC pipe may be
Figure 29. Field-Supplied Pressure Relief Valve Polymer glued directly into the headers unions.
Header (Residential Units)
A 3/4" NPT connection is provided in the header for Heat Exchanger Reversal
installation of a 75 PSI (517 kPa) pressure relief valve.
The PRV is shipped loose in the accessory carton with the Procedure for Residential Models
pagoda top. The pressure relief valve shall be installed in 1. Remove right and left side access panels. See
a vertical position. Figure 31.

F10663
PRESSURE RELIEF VALVE

Figure 30. Pressure Relief Valve Brass Header (ASME

Models)
F10652
NOTE: To avoid water damage or scalding due to valve
operation, drain pipe must be connected to valve outlet Figure 31. Access Panels
and run to a safe place of discharge. Drain pipe must
be the same size as the valve discharge connection
throughout its entire length and must pitch downward
from the valve. No shut-off valve shall be installed
between the relief valve and the drain line. Valve lever
should be tripped at least once a year to ensure that
waterways are clear.

20
Plumbing Diagrams
Water Connection

ISOLATION
VALVE

BALL VALVE

PRESSURE
RELIEF VALVE

PUMP

Figure 32. Single Pool Heater Installation UNION

CHECK VALVE

Figure 33. Multiple Pool Heater Installation

21
2. Disconnect wires at high limit, AGS (automatic gas 5. Reconnect high limit, AGS, water pressure switch
shut-off), pressure switch on the in/out header and wires, and ProTek Shield bonding wire.
ProTek Shield bonding wire. See Figure 34. 6. Digital Models: Insert the temperature sensor into
the compression fitting, so that the sensor is flush with
the top of the fitting. Tighten 1/2 turn past hand tight.

Millivolt Models: Insert sensor bulb and retainer clip

into sensor well.
7. Allow for water flow through the heater and check for
leaks.
8. Re-attach access panels to the opposite sides.
For instructions on reversing the heat exchanger
F10653 connections on ASME models, call your factory
representative.
Figure 34. Component Wiring Locations - In/out Header
3. Digital Models: Remove the thermostat temperature
sensor by loosening the compression fitting nut. Re- 5. ELECTRICAL WIRING
route the sensor to left side of the heater. See Figure 35.
NOTE: If it is necessary to replace any of the original
Millivolt Models: Remove the temperature sensor wiring, use 105°C wire or its equivalent, and/or 150°C
wire or its equivalent, like the original wiring.
bulb and retainer clip by loosening the compression
fitting nut. Re-route the sensor bulb to the left side of
the heater. See Figure 36. AAWARNING: Digital heaters are factory-wired for
240 VAC, 1 Ph, 60 Hz power supply. DO NOT attempt to
operate at 208 VAC.

Millivolt Models
The Millivolt models are equipped with a self-generating
electrical system in which the electrical current is provided
by a pilot generator. No external electrical connections are
required.
When installing a remote switch, do not exceed 10 ft (3
F10654 m) of wiring from the heater. Use 18-gauge stranded wire.
Figure 35. Digital Temperature Sensor Location Digital Models
The standard field-wiring connection is on the right side of
the heater.
To wire the heater from the left side, follow these steps:
1. Remove the two (2) screws that hold the front door
to the heater. Remove and set aside door for better
access to wiring.
2. Remove the four (4) screws that hold down the
junction box to the sway brace.
F10667 3. Remove the transformer cover located on the far
Figure 36. Millivolt Temperature Sensor Location right by removing one (1) screw.

4. Remove (12) nuts holding the inlet/outlet and return 4. Remove the two (2) screws that hold down the
headers to the tube sheets. Clean off tube sheet area transformer.
where the gasket seats. Also clean off the header and 5. Remove the one (1) screw that holds down the
the gasket. Apply a non-petroleum-based lubricant to ground wires.
the gasket such as Aqualube. Re-attach the headers 6. Disconnect P6 connector from PC board.
to the opposite sides, making sure they are installed
in an upright position. Do not over-tighten. Torque 7. Remove transformer from its current location and
should not exceed 7 ft/lb. See Figure 35. relocate it on the far left side of the heater.

22
8. Re-route all high-voltage wires and ground wires There should be no connection to the red wire for 120
through the left jacket side of heater. VAC operation. Attach a wire nut to the red wire.
9. Re-install P6 connector, ground wires (SPG), L1
HOT
BLACK
transformer, junction box, front door, and plug right BLACK

side with the left side’s grommet plug. RETURN

or
NOTE: 7/8" diameter holes not utilized on jacket and SUPPLY NEUTRAL WHITE WHITE
HEATER
control box can be used for fireman switch, auxiliary SIDE 4 WIRES
control interface or power vent (D-2) wiring. GROUND
GREEN GREEN

Electrical Power Draw

RED

AA CAUTION: Heater must be electrically grounded and Figure 38. 120 VAC Wire Connection
bonded. Bonding lug is provided loose with the heater.
Install bonding lug on lower right or left side of jacket 240 VAC Wiring
as necessary for bonding the heater. Mounting hole is
provided on the jacket. For 240 VAC input power to the unit, connect the black
wire to the “L1” or hot leg of the power supply. Connect the
NOTE: Failure to ground the heater electrically could red wire to the “L2” or second hot leg of the power supply.
affect the heater’s electronics. There should be no connection to the white wire for
240 VAC operation. Attach a wire nut to the white wire.
NOTE: See "Time Clock/Fireman’s Switch" on page 31
AA WARNING: DO NOT attempt to operate the heater
for further instructions if using a time clock/fireman’s
at 208 VAC.
switch.
HOT
L1
The Electronic Intermittent Ignition Device automatically BLACK BLACK

lights the pilot and main burners upon a call for heat. The HOT
heater is supplied with a dual-voltage transformer for 120 L2
RED RED
VAC or 240 VAC input power hookup. SUPPLY HEATER
SIDE 4 WIRES

When operating on 120 VAC power, units draw 4 amps. GREEN GREEN
When operating on 240 VAC, draw 2 amps.
OPTION LOCATION CONTROL BOX
(FACTORY MOUNTED WHITE
LEFT SIDE FIELD WIRING
LOCATION)
Figure 39. 240 VAC Wire Connection

Heater must be electrically grounded and bonded in

accordance with local codes, or, in the absence of local
codes, with the latest edition of the National Electrical
Code, ANSI/NFPA 70. (Canada - Canadian Electrical
Code, CSA C22.1, Part 1 and Part 2.)

SWAY BRACE AA CAUTION: If the transformer’s primary side is wired

for 120 VAC and 240 VAC is applied, damage to the
transformer and PC board may result. Such damages
are not covered under manufacturer’s limited warranty.
BONDING LUG
BONDING LUG (STANDARD NOTE: Input power to the heater (120 or 240 VAC) can
(OPTIONAL F10650 LOCATION)
LOCATION) be supplied from the load (pump) side of time clock or
directly from the GFCI power source. It is preferred
Figure 37. Heater Wiring Locations that full-time power be supplied to the heater from
the GFCI power source, and that the heater be
controlled by the fireman’s switch connection or
Transformer Wiring using a two or three-wire remote. If using a switched
GFCI power source, the heater could display false
120 VAC Wiring service indicators on the display panel if the pump is
For 120 VAC input power to the unit, connect the black turned off.
wire to the “L1” or hot leg of the power supply. Connect the
white wire to the “Ret” or neutral leg of the power supply.

23
6. WIRING DIAGRAM - MILLIVOLT

24
 7. WIRING DIAGRAM - DIGITAL

CONTROLLED COPY approved for factory use on 9/27/2019. RAYPAK PROPRIETARY AND CONFIDENTIAL INFORMATION . Approval signatures on file in Engineering.

25
8. CONTROLS NOTE: Caution must be used to not damage controls
or wiring.
PRESSURE SWITCH
TEMP SENSOR
CONTROL HL1 - HIGH LIMIT
BEZEL HL2 - HIGH LIMIT

UNITHERM KNURLED
GOVERNOR SCREW

F10646-5

Figure 42. Knurled Screw Location

ROLL-OUT
SWITCH PROTEK Control Adjustments -
Millivolt Models
SHIELD
ASSY
GAS F10640-2
VALVE
The water temperature is controlled by the heater thermostat
on the upper front panel of the heater. The control center
Figure 40. Location of Controls (View One)
contains an On/Off switch and one thermostat.
The thermostat is fitted with a means of limiting the upper
temperature just below the maximum level. The knob stop
adjustment ring illustrated below is adjustable by loosening
the set screw, rotating the knob stop ring to the desired
location and re-tightening the set screw.

POOL TEMPERATURE
SPA TEMPERATURE
RANGE
RANGE

PILOT
DRAIN KNOB STOP RING STAND-BY
PLUG IN
REAR SET SCREW TEMPERATURE
HEADER F10640-3

Figure 41. Location of Controls (View Two) KNOB STOP SHOWN ABOVE IS IN THE SPA TEMPERATURE RANGE.

Figure 43. Control Adjustment – Millivolt Models

Control Panel Removal
1. Remove screw from front door. Set aside door for
serviceability.
2. Remove (4) screws from sides of control panel.
3. Rotate control panel down until panel stops. Do not
force.

26
Control Adjustments – Digital Models
The pool heater touchpad, located on the upper front panel
of the heater, allows the user to select either POOL or SPA
operation, and to adjust the setpoint temperature. The LCD
display window indicates the mode (OFF, SPA, POOL)
and the actual water temperature. A manual power switch
provided below the touchpad turns the control power ON
or OFF. See Figure 44. Figure 45. Alternating Display During Heating

TEMP ADJUST BUTTONS

MODE BUTTON

TEMP

MODE

Program Mode Button (SW1)

Figure 46. Thermostat Program Button (SW1)

LCD DISPLAY ON OFF
Service Menu and Fault History
Figure 44. Control Adjustment – Digital Models
To access the Service Menu and fault history, press the
Mode and UP buttons simultaneously for 3 to 5 seconds.
Mode Button The heater will continue to operate while in the Service
The MODE button is used to select POOL or SPA operation. Menu. The first screen displayed is the Flame Strength
It also allows the user to turn the heater off electronically, indicator, which indicates the pilot flame current using a bar
allowing the LCD to remain energized and to continue graph and numerical display. A signal of less than 4 bars
showing the actual water temperature. indicates a weak flame signal and may require service.
Refer to the Troubleshooting section for possible causes
Temp Buttons and corrections.
If the heater is in POOL or SPA mode, the desired water
temperature (SETPOINT) will be displayed and may be
adjusted using the UP or DOWN buttons.

Operation
Figure 47. Flame Strength Indicator
In the POOL or SPA modes, the actual water temperature
is displayed along with the desired water temperature Press the DOWN button. The Supply Voltage screen
(SETPOINT). When the water temperature is above the indicates the voltage supplied to the control board. Normal
setpoint, “Water Temp” will alternate with “No Demand.” readings range from 24 to 29 volts.
When the water temperature is below the setpoint and the
heater is firing, “Water Temp” will alternate with “Heating.”
To adjust the setpoint temperature, make sure the control
is in the appropriate mode (POOL or SPA) and push the
UP or DOWN buttons.
By default, the setpoint range is 50-104°F (10-40°C). See Figure 48. Supply Voltage Indicator
MAX Settings on page 28 to increase the MAX setting,
Press the DOWN button. The Run Time indicates the total
if necessary.
hours of operation for the pool heater, as measured by the
amount of time that the main gas valve has been powered.
The Cycle count indicates the number of on/off cycles of

27
the heater, as measured by the number of times the pilot
valve has been powered. Set Factory Defaults
Refer to step one above to access the program screen.
SET FACTORY DEFAULT should appear on the screen.
If it does not, press the MODE button until it appears on
the digital display. Press and hold both UP and DOWN
buttons for 5-7 seconds until DEFAULT SET appears.
This operation resets the operating program to its factory
Figure 49. Run Time/Cycles default values.
Press the DOWN button. The Fault History displays up to Both the POOL and SPA setpoints will revert to 65°F (18°C)
ten faults in memory. The order of the faults begins with and both POOL and SPA maximum temperature settings
“Fault Last,” which is the most recent fault, and proceeds will be 104°F (40°C). The CONTROL LOCKOUT PIN will
through ten most recent messages in chronological order. be cleared and the control will resume normal operation.
The second line of the display shows the fault message.
If there are no faults in the history buffer, the second line Clear Faults
reads “All Faults Clear.”
Refer to step one above to access the program screen.
Press the MODE button until CLEAR FAULTS appears
on the digital display. Press and hold both UP and DOWN
buttons for 5-7 seconds until FAULTS CLEARED appears.
This operation resets the Fault History file to “0” and clears
all the stored faults.
Figure 50. Fault History Indicator
Fahrenheit or Celsius
Refer to step one above to access the program screen.
Program Button Press the MODE button until FAHRENHEIT or CELSIUS
1. Remove the four screws holding the control cover, appears on the digital display. The UP or DOWN buttons
and swing the panel down so the back side of the will select FAHRENHEIT or CELSIUS on the temperature
board is visible. Locate the Program Mode button display. Choose the desired temperature scale.
(SW1). See Figure 46. Press and hold the button
for 5-7 seconds until SET FACTORY DEFAULTS Spa Max Temp – Spa Setpoint Maximum Adjustment
appears on the display. Release the program button. Refer to step one above to access the program screen.
2. Press the MODE button sequentially until the desired Press the MODE button until SPA MAX TEMP appears on
program event is reached. There are 5 different the digital display. Using the UP and DOWN buttons will
events that can be programmed. They appear in the change the Maximum Temperature Setting to your desired
sequence listed in Figure 51. value. The control can be set for a maximum of 107°F
(42°C).

Resets board to factory default

Pool Max Temp – Pool Setpoint Maximum
settings. Adjustment
Refer to step one above access into the program screen.
Press the MODE button until POOL MAX TEMP appears
on the digital display. Using the UP and DOWN buttons
Resets faults in the History File. will change the Maximum Temperature Setting to your
desired value. The control can be set for a maximum of
107°F (42°C).
Control Lockout
Change from Fahrenheit to The heater is equipped with a Control Lockout feature
Celsius. to prevent unauthorized tampering or adjustment of the
control settings. To lock out the controls, press the DOWN
button and MODE button for 5 seconds. Choose a three
SPA setpoint maximum digit PIN, using the UP and DOWN buttons to select the
adjustment. digits and the MODE button to lock in selections. Confirm
POOL setpoint maximum your selection and record your PIN.
adjustment.

Figure 51. Programmable Events

28
To unlock the controls, press any button to bring up the Voltage is sensed at the Lo NOx
ENTER PIN menu. Enter the PIN that was used to lock the LoNox Tab Fault terminal on a non -Lo- NOx heater
control. Note that power cycling will not clear the lockout. (Lo NOx tab is intact).
Successfully unlocking the control will display “LOCKOUT
Internal Fault Board fault, replace board.
CLEARED.” Failure to enter the correct PIN will display
“INVALID PIN.” Memory fault, reset set points,
EEPROM Fault
replace board if fault does not clear.
In the event that the user-selected PIN is lost or does not
Time clock/fireman switch circuit is
clear the Control Lockout, use the Program Button to SET Clock/Fireman Sw
open.
FACTORY DEFAULTS. This will clear the PIN and allow
normal operation and selection of a new PIN if desired. Low Temp
Water temperature below 36°F (2°C).
See Program Button page 28 for details Lockout
Table P. Heater Status Messages - Active Faults
NOTE: Both the POOL and SPA setpoints will revert
back to 65°F (18°C) and the POOL and SPA maximum
The following conditions are displayed only while there is a
temperature settings will be 104°F (40°C). These
setpoints will need to be readjusted to desired settings. demand for heat present.
Display Condition
NOTE: The LCD temperature display may not agree with
Water Sw Open Water pressure switch open.
the temperature reading of your pool or spa thermometer.
The heater reads the water temperature at the inlet. Due Vent/Field
to the circulation characteristics of any pool or spa, the Vent spill switch/field switch #1 open.
Sw #1
water temperature at the inlet to the heater may differ
from that observed at a given location in the pool or spa. Hi Limit 1 Fault High limit 1 open.
Hi Limit 2 Fault High limit 2 open.
Status and Diagnostics Rollout Sw Open Rollout switch open.
The digital models are programmed to display a variety Field-supplied flow switch/field switch
Flow/Field SW #2
of status and diagnostic messages, depending on the #2 open.
operating conditions.
Alternating with “No pilot sensed”
The following heat status messages are displayed in Pool, - Pilot flame not established within the
Ignition Lockout
Spa, and Remote modes when there are no active fault required time (15 sec or 90 sec).
(Propane Tab
conditions. Alternating with “Main Ign Failure”
Broken)
- Pilot flame lost during the 8 second
Display Condition trial to ignite the main burner.

Heating Call for heat established, flame present. Ignition Failure Alternating with “No pilot sensed”
(Propane Tab Not - Pilot flame not established within 90
Spark Spark operating. Broken) seconds.
No Demand Heat demand is satisfied. Alternating with “Main Ign Failure”
Ign 6 min Delay - Pilot flame lost 4 times within the 8
Table O. Heater Status Messages - No Active Faults (Propane Tab Not second trial to ignite the main burner.
Broken) Heater will lockout for 6 minutes before
The following conditions are displayed in Pool, Spa and retrying.
Remote modes.
Table Q. Heater Status Messages - Demand for Heat
Display Condition
Thermistor temperatures disagree by
Sensor Failure
more than 2°F (1°C).
Thermistor sensor failed open. Below
Sensor Open
-20°F (-29°C).
Thermistor sensor failed short. Above
Sensor Short
217°F (103°C).
Board is sensing flame when
Flame w/o CFH both main and pilot valves are
commanded shut.
Pilot gas valve output is not in
PV Output Fault
commanded state.
Main gas valve output is not in
MV Output Fault
commanded state.

29
Remote Control Installation and Operation Activating the Remote
CAUTION: Before installing remote controls to To activate or deactivate the remote function:
AA
the digital heaters, read the following: The digital 1. Press and hold the UP and DOWN arrow buttons for
thermostat model is remote-ready in most cases. The 3 to 5 seconds.
digital liquid crystal display (LCD) shows the actual pool
temperature, operating status, and service codes. See The second line of the display will alternate even when the
Figure 52. The touch pad on the control panel allows unit is off (“No Demand”).
you to select the desired pool or spa temperature. It also
indicates when a remote system is controlling the heater NOTE: When in remote operation, the keypad mode and
by displaying Remote in the display. When connecting temp buttons are disabled.
the heater to a remote system, identify whether it is a
two- or three-wire remote system. Select the appropriate
instruction listed below to properly install the remote to
the heater.

Remote Operation
The heaters are equipped with the ability to work with
external remote controls. The supplied 7-pin remote wiring
connector supplies power out to either a toggle switch or
Figure 53. Remote Control Menu - Activation
the switch contacts of a third-party remote. The remote
works by either making or breaking the circuit created
by the remote wiring. Typically, a remote does not supply Remote Control Wiring -
power to the heater, it only provides a switching function Digital Models Only
to turn the heater On or Off. If your remote is supplying
its own voltage to the heater, it will not work with this
heater and may damage the digital circuit board. ATTENTION
For operation of the heater using the onboard thermostatic OBSERVE PRECAUTIONS
controls with a time clock. See "Time Clock/Fireman’s ELECTROSTATIC
Switch" on page 31. SENSITIVE DEVICES

AA CAUTION: Electrostatic Discharge (ESD) damage

can be caused by direct or indirect contact with the
OFF Mode
wiring or circuit board. When one walks to the heater
area, an electrostatic charge accumulates on the body.
Contact of a finger allows the body to discharge, possibly
causing device damage. This damage can be limited if
the service person discharges himself, following ESD
preventive/removal practices, and holds on to the heater
enclosure for 5 seconds before proceeding.
Heating in the POOL Mode
Important Installation Notes for Remote or External
Wiring Configuration:
• Remote wiring must be run in a separate conduit.
• Remote wiring must not be run parallel to high voltage
Heating in the SPA Mode lines.
• For runs of under 30' (9 m), remote wiring should
have stranded conductors with a minimum of 22
AWG, 600V, cable twisting 1.5" to 2.5" (3.8 to 6.4 cm)
lay and jacketed.
• For runs over 30' (9 m), the conductors should be a
Remote Mode
minimum of 20 AWG, 600V, cable twisting 1.5" to 2.5"
(3.8 to 6.4 cm) lay that is shielded and jacketed.
• Maximum cable length is 200' (61 m).
Figure 52. Remote Control Menu - Remote Operation • For both two- and three-wire remote systems, the
provided 7-pin wiring connector must be utilized.

30
 NOTE: The remote wires must be connected to the
7-pin connector before the connector is plugged into the
board.

2-Wire Remote Control (On-Off)

This application assumes that only one heating function
(pool or spa) is required.
1. Turn on power to the heater.
2. For a 2-Wire Remote Control from a remote without
its own sensor, push the MODE button to the “POOL”
or “SPA” mode and set the desired setpoint (eg. 102 BLU - 24VAC
°F (39°C) for Spa).
ORN/BLK - To Spa (COMM)
3. For a 2-Wire Remote Control from a remote with its
Wire Nut -
own sensor, push the MODE button “POOL” or “SPA” BLK/ORN - To Pool (COMM)
mode and set the temperature to the highest setting
available on the control. The actual setpoint will be Figure 55. 2-Wire Remote Harness Installation on the P8
controlled by the remote control. Connector of the Board
4. Turn the MODE button to “OFF” and remove power
from the heater.
5. On the “Remote Interface Harness”, connect the
BLUE wire to one side of the “REMOTE” switch and
connect the other side to either the ORANGE/BLACK
wire for “SPA” operation or the BLACK/ORANGE
wire for “POOL” operation. See Figure 54.

Pool Common
(BLK/ORN)

Spa Common
(ORN/BLK) BLU - 24VAC

ORN/BLK - To Spa (COMM)

24VAC HOT
(BLU) BLK/ORN - To Pool (COMM)

Figure 54. 7-Pin Remote Interface Harness Figure 56. 3-Wire Remote Harness Installation on the P8
Connector of the Board
6. Attach wire nut on unused wire to the “Remote
Interface Harness.” 4. On the “Remote Interface Harness” connect the BLUE
7. Install the “7-Pin Remote Interface Harness” to the wire to one side of the “REMOTE” switch and connect
P8 connector and turn power “ON” to the heater. the ORANGE/BLACK wire for “SPA” operation and
See Figure 55. the BLACK/ORANGE wire for the “POOL” operation.
See Figure 54.
For activation of the remote control, see section on page
30. 5. Install the “Remote Interface Harness” to the
P8 connector and turn power ON to the heater.
3-Wire Remote Control Using Three- See Figure 56.
Position Switch (Pool-Off-Spa, or Low-Off- For activation of the remote control, see section on page
High) 30.
This application assumes that both heating functions (pool
and spa) are required. Time Clock/Fireman’s Switch
1. Turn on power to the heater. To operate the heater with a time clock, connect the timer
2. Push the MODE button to the “POOL” or “SPA” mode to the fireman’s switch connection in the heater’s wiring.
and set the desired temperature for each (eg. 80°F The time clock should be of the dual switch type and set to
(27°C) for Pool and 102°F (39°C) for Spa). shut off the call for heat to the pool heater (chauffe-piscine)
15 to 20 minutes prior to shutting down the pool pump.
3. Turn the MODE button to “OFF” and remove power
from the heater.
31
For millivolt heaters, the fireman's switch connection is by turning the pump off and on several times. The
a wire nut located in the Violet/Black wiring between the burners should shut off immediately when the pump
manual toggle switch and the gas valve. heaters, splice is turned off. If it does not, repeat the above steps
into the red/white wire to connect the time clock. until proper operation is observed.
For digital heaters, the fireman’s switch connection is
located on the 14-pin header connected to the digital
control board. Splice into the red wire jumper tagged
“Where necessary add “Fireman’s” switch circuit here” to
connect the time clock.
The fireman’s switch connection on both millivolt and
digital heaters must be a dry contact and must not
supply power to the heater. Powering the fireman’s
switch connection externally may damage the heater,
and is not covered by warranty.
Millivolt heaters: Do not exceed 15 ft (4.5 m) of total wiring
using 14 AWG stranded copper wire rated for 105°C F10671
minimum.
Figure 57. Water Pressure Switch Assembly
Digital heaters: Do not exceed 50 ft (15 m) of total wiring
using 18 AWG stranded copper wire rated for 105°C NOTE: The sheet metal access panel should be in place
minimum. at all times to protect the water pressure switch from
rain and other environmental factors.
NOTE: When using a time clock, the digital heater will
display “Clock/Fireman Sw” when the fireman’s switch MAY REQUIRE ADJUSTMENT
is open, indicating that the time clock has shut off the FOR LOWER PRESSURE

call for heat.

Water Pressure Switch 5 FT. MAX

The water flow switch ensures that the heater operates

(1.52 m MAX)
MAY REQUIRE ADJUSTMENT
FOR HIGHER PRESSURE
only when the filter pump is in operation. It is located on the
In/Out header. It is factory-set at 1.75 PSI for deck-level 5 FT. MAX
(1.52 m MAX)

installations.
Water Pressure Switch Adjustment
When the heater is located below the level of the spa or
pool, it may be necessary to adjust the presssure switch to
compensate for the no-flow static head. If it is necessary
to adjust the water pressure switch, utilize the following Figure 58. Pressure Switch Adjustment Requirements
procedure:
NOTE: If heater is installed outside of the limits shown,
1. Make sure the pool filter is clean before adjusting the a higher pressure rated (11 psi / 76 kPa) switch may be
switch. used. A flow switch, mounted and wired adjacent to the
heater, may be used in place of the factory-mounted
2. Set the heater control to the OFF mode. pressure switch. See "ILLUSTRATED PARTS LIST" on
3. Turn the filter pump ON and confirm that the pressure page 45 for 11 psi / 76 kPa water pressure switch.
switch is closed (use a multimeter to check). If the
pressure switch fails to close, either the switch setting
Two Speed Pumps
is too high or not enough pressure is being supplied
by the filter pump. In some cases, the flow on the low-speed is insufficient
to operate the heater. This is apparent when the water
4. Turn the heater ON.
pressure switch cannot be further adjusted or if the heater
5. Manually turn the pressure adjustment knob clockwise makes banging noises or shuts off on high limit. In these
until the heater shuts off. (A flat screwdriver may be cases, the pump must be run at high speed when heating
necessary if knob is too tight.) the water.
6. Slowly turn the adjustment knob counter-clockwise
AA CAUTION: Do not operate the heater without the
until the heater calls for heat again. function of a properly adjusted water pressure switch
7. Turn an additional 1/2 turn counter-clockwise. or flow switch.

8. While the heater is running, check the adjustment

32
 case the pilot flame is extinguished. The pilot burner must
Flame Roll-Out Safety Switch be manually re-lighted to place the heater in operation
Heaters are equipped with a thermal cutoff device to again. Refer to the lighting instructions provided on the
prevent flame roll-out in the event the heat exchanger heater label.
becomes blocked. This is a “single-use” type fusible link
or thermal fuse, that must be replaced when disabled
by an over-temperature condition, caused by excessive Pilot Safety - Digital Models
restriction in the heat exchanger flue passage. The heater employs a pilot safety which closes the main
gas valve within 8/10ths of a second whenever the pilot
flame is interrupted. The pilot flame is automatically lit
when the device is powered. The heater performs its own
safety check and opens the main valve only after the pilot
is proven to be lit.
Burner Tray Removal
1. Shut off main electrical power switch to heater.
F10668 2. Shut off gas upstream of heater.
Figure 59. Flame Roll-Out Safety Switch 3. Remove front door.
4. Disconnect gas line from gas valve.
High Limits
5. Remove (2) screws that mount burner tray to unit,
The heater is equipped with two high limits.
and (2) screws that secure gas valve to jacket.
On polymer headers both are automatic and are located in
6. Disconnect wires that terminate at gas valve.
the inlet/outlet header. Both are set at 135°F (57°C).
7. Disconnect hi-tension wire from PC board.
On ASME brass header both are located on the inlet/outlet
header. HL1 is manual reset and set to open at 160°F 8. Carefully slide out burner tray assembly.
(71°C). HL2 is automatic and set to open at 135°F (57°C). 9. Reverse above procedure to reinstall.
NOTE: An erratic high limit is often characteristic of GAS VALVE
an internal heat exchanger problem, e.g. scale build-up,
defective bypass. Refer to "TROUBLESHOOTING" on
page 40. BURNER
PILOT

AUTO RESET MANUAL RESET BURNER GAS

(ASME ONLY) HOLD-DOWN ORIFICE
BRACKET

F10669-1

Figure 60. High Limit Switches

High Limit Removal Figure 61. Burner Tray Assembly

1. Shut off main electrical power switch to heater.

Gas Valve Removal
2. Remove inlet/outlet sheet metal access panel.
1. Shut off gas supply to the heater. Remove gas piping
3. Remove defective high limit and replace with the to gas valve inlet.
correct new high limit.
2. Disconnect wires, pilot tubing and bleed line, if
4. Replace access panel. required.
3. Remove burner tray from heater.
Pilot Safety - Millivolt Models 4. Turn vertical gas pipe from manifold slightly and
Heaters equipped with the standing pilot (millivolt system) unscrew gas valve.
employs a pilot which act as a safety device to shut down
5. Reverse above procedure to reinstall.
the flow of gas to the main burners and the pilot burner in

33
 2. Remove top jacket holding screws.
Main Burner And Orifice Removal
3. Remove rear top panel.
1. Remove burner tray, following above procedure.
4. Remove screws mounting the rain shield to the rear
2. Remove screws and burner hold-down bracket.
panel. Also remove the screws that mount the rain
NOTE: If the heat exchanger is sooted badly, the burner shield to the sway brace. Remove rain shield.
hold-down bracket and spacer can become distorted
5. Remove the four (4) screws holding down the flue
from direct-flame impingement and this usually
necessitates replacement of these parts. collector. Remove the flue collector.
6. Disconnect flange nuts on Inlet/Outlet header,
3. Lift burners from slotted spacers and slide from remove ProTek Shield Assy bonding wire from heat
orifices. Clean with a wire brush. exchanger stud, loosen union at gas pipe and slide
4. Orifices usually do not need to be replaced. To clean, heater away from piping.
run either copper wire or wood toothpick through 7. Lift heat exchanger straight up using caution not to
orifice. Do not enlarge hole. To remove orifice, use a damage refractory.
socket wrench and remove from manifold. DO NOT
8. Reverse above procedure to reinstall. Make sure the
overtighten when reinstalling.
insulation strips are properly replaced on top of the
Pilot Removal And Cleaning refractory retainer.
1. Disconnect pilot tubing and wires from gas valve.
Tube Cleaning Procedure
2. Remove pilot assembly from burner tray.
Establish a regular inspection schedule, the frequency
3. Remove pilot from bracket. depending on the local water conditions and the severity
4. Remove pilot orifice and air opening, and clean with of service. Do not let the tubes clog up solidly. Clean out
wire or small brush. deposits over 1/16" in thickness.
The heater may be cleaned from the return header
CAUTION! Do not enlarge hole in pilot orifice.
AA side, without breaking pipe connections. It is preferable,
5. Reverse above procedure to reinstall. however, to remove both headers for better visibility
through the tubes and to be sure the ground-up lime dust
does not get into the system. Note that you do not remove
the top panel or the heater exchanger, generally.
PILOT
After reaming, mount the wire brush in place of the auger
and clean out debris remaining in the tubes.
Another method is to remove the heat exchanger, ream
AIR tubes and immerse heat exchanger in non-inhibited de-
OPENING
scale solvent for severe scale build-up.
ORIFICE

Extension Auger Wire Brush

Figure 62. Millivolt Pilot
Pieces (2) with Carbide Tip

Figure 64. Tube Cleaning Kit

Desooting Procedure

AAWARNING: Soot Is Combustible. Exercise Extreme

Care.

Soot will clog areas between fins and cause eventual

tube failure. Any sign of soot at the base of the burners or
Figure 63. Digital Pilot around the outer jacket indicates a need for cleaning.
1. Remove top and flue collector from cabinet.
Heat Exchanger Removal
2. Remove “V” baffles from heat exchanger.
1. Shut water, gas and electricity off, close valves and
3. Remove burner tray. (See page 33).
relieve pressure, then remove relief valve. Remove
side access panels.

34
4. Remove ProTek Shield Assy bonding wire from heat
exchanger stud.
Unitherm Governor (U.G.) Replacement
1. Shut water, gas and electricity off, close valves and
5. Remove heat exchanger from the heater and wash
relieve pressure.
with a garden hose, making sure soot is removed
from spaces between fins. 2. Drain heat exchanger.
6. Reverse above procedure to reinstall. 3. Remove retainer plug located next to the outlet pipe
connection on polymer header models.
NOTE: In extreme cases it may be necessary to do
steam cleaning at the local car wash. DO NOT WIRE 4. Unsnap old U.G. to remove from retainer plug. Snap
BRUSH. in new U.G.
5. Reinstall retainer plug, taking care to lubricate
Combustion Chamber Removal gasket with a non-petroleum based grease such as
AquaLube.
To remove combustion chamber, you must first have
removed the heat exchanger.
UG PLUG

UNITHERM GOVERNOR

GASKET

F10725

F10723

Figure 65. Refractory Panels

Figure 67. Unitherm Governor - Polymer
WARNING: When removing the burners or heat
AA
exchangers, take precautions to avoid creating airborne To test the operation of the Unitherm Governor - Polymer,
dust and avoid inhaling airborne fibers. When cleaning place in hot water (over 110°F [43°C]) and watch for
spills, use wet sweeping or High Efficiency Particulate movement against spring. If there is no movement,
Air (HEPA) filtered vacuum to minimize airborne dust. replace unit.
Use feasible engineering controls such as local exhaust
ventilation or dust collecting systems to minimize UG/BYPASS ASSY
airborne dust. Wear appropriate personal protective
equipment including gloves, safety glasses with side
shields, and appropriate NIOSH certified respiratory
protection, to avoid inhalation of airborne dust and
airborne fiber particles.

Immersion Well Replacement (Millivolt)

UNITHERM
1. Shut off water to heater and drain heat exchanger. GOVERNOR
2. Remove access panel on water connection side.
F10642-2
3. Remove old immersion well with bushing and sleeve.
Figure 68. Unitherm Governor/Bypass Valve Assy – ASME
4. Install replacement well in header.
NOTE: The U.G. on brass header models (ASME)
NOTE: Installation in polymer header should be hand can only be replaced by replacing the entire Unitherm
tight plus 1/2 turn. Governor/Bypass Valve Assembly.

F10670

Figure 66. Well Assembly

35
9. OPERATING Visual inspection
INSTRUCTIONS With the heater on, remove the door and make a visual
check of the pilot and burner. The flame should be blue
with a well-defined pattern.
Before Start-Up
A yellow or “floating” flame indicates restricted air openings
Burners or incorrect orifice size. Should this occur, shut the heater
off and contact your installer or gas supplier.
Keep heater area clear and free from combustibles,
flammable liquids and chemicals. Do not obstruct the flow
of combustion and ventilation air. 4" MAX
(102 mm)
Water
Water must be flowing through the heater during operation.
Ensure that the system is filled with water and that the
pump is operating.

Figure 70. Main Burner Flame

Start-Up Procedures
Your pool/spa heater has been designed for years of safe
and reliable pool/spa water heating. It is available with
millivolt or electronic ignition. ASME-certified units typically
used in commercial applications, are also available. This
manual provides installation, operation, maintenance, and
service information for these heaters.
TEMP ADJUST BUTTONS
MODE BUTTON Figure 71. Millivolt Pilot Burner Flame

Water Pressure Switch

A water pressure switch is provided in the heater to shut off
TEMP the burners in the event that water supply is interrupted. It
MODE
is very important to verify that the switch electrically opens
and shuts off the gas valve when water flow to the heater
is interrupted. Otherwise rapid and severe damage will
likely occur to the heater.
LCD DISPLAY ON OFF The water pressure switch should be checked and adjusted
Figure 69. Heater Control Toggle Switch for proper operation by a qualified service person at the
time of installation and periodically checked thereafter.
If your heater has been installed correctly, operating the Refer to "Water Pressure Switch Adjustment" on page
heater is an easy task. The upper front panel of the heater 32 of this manual.
contains the control center that allows you to turn the
heater On or Off and adjust the temperature settings for
the pool or spa. The temperature range is factory set from
65°F (18°C) to 104°F (40°C). See Figure 69 for location of
toggle switch to turn the heater On and Off.
See Section 8 for additional details about the use of the
controls in the Control Adjustments subsection.

After Start-Up
Feel the inlet and outlet pipes. Outlet pipe should be only F10671

slightly warmer than the inlet. It should not be hot.

Figure 72. Water Pressure Switch
WARNING: Should overheating occur or the gas
AA
supply fail to shut off, turn off the manual gas control to AA WARNING: Operation of the heater without water
the appliance. circulation will cause rapid and severe damage to the
heater, and will void the warranty.

36
 OPERATING INSTRUCTIONS AND SHUT-OFF PROCEDURES
MILLIVOLT SYSTEM
(MANUALLY-LIGHTED PILOT)

FOR YOUR SAFETY READ BEFORE LIGHTING

A. This appliance has a pilot which must be lit *If you cannot reach your gas supplier, call the
by hand. When lighting the pilot, follow these fire department.
instructions exactly.
C. Use only your hand to push in or turn the gas
B. BEFORE LIGHTING, smell all around the ap- control knob. Never use tools. If the knob will
pliance area for gas. Be sure to smell near the not push in or turn by hand, do not try to repair
floor because some gas is heavier than air and it. Call a qualified service technician. Force or
will settle on the floor. attempted repair may result in a fire or explo-
sion.
WHAT TO DO IF YOU SMELL GAS:
*Do not try to light any appliance. D. Do not use this appliance if any part has been
*Do not touch any electric switch; do not use any under water. Immediately call a qualified ser-
phone in your building. vice technician to inspect the appliance and to
*Immediately call your gas supplier from a neigh- replace any part of the control system and any
bor’s phone. Follow the gas supplier’s instruc- gas control which has been under water.
tions.

LIGHTING INSTRUCTIONS

1. STOP! Read the safety information above.

2. Set the thermostat to the lowest setting.
3. Turn On/Off switch to the "OFF" position.
4. Remove heater door panel.
5. Push in gas control knob slightly and turn clockwise
to "OFF".
NOTE: Knob cannot be turned from "PILOT" to "OFF"
unless knob is pushed in slightly. Do not force.
8. Turn gas control knob counter-clockwise to
6. Wait 5 minutes to clear out any gas. If you then smell "PILOT".
gas, STOP! Follow "B" in the safety information 9. Place flame to end of pilot tube. Push in control knob
above. If you don’t smell gas, go to the next step. all the way and hold to light pilot. Continue to hold
7. Locate pilot mounted in the right side panel of the control knob in for about one minute after the pilot
burner tray. has lighted, release knob and it will pop up. Pilot
HONEYWELL should remain lighted. If it goes out, repeat steps 5
MILLIVOLT through 9. If knob does not pop up when released,
GAS VALVE stop and immediately call your service technician or
gas supplier.
10. Stand to the side of the heater and turn the gas
control knob counter-clockwise to "ON".
11. Replace heater door panel.
ROBERTSHAW 12. Turn On/OFF switch to the "ON " position.
MILLIVOLT GAS VALVE
13. Set thermostat to the desired setting.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat at the lowest setting. 4. Push the gas control knob slightly and turn clockwise
to “OFF”. Do not force
2. Turn On/Off switch to the "OFF" setting.
5. Replace heater door panel.
3. Remove heater door panel.

37
 OPERATING INSTRUCTIONS AND SHUT-OFF PROCEDURES
ELECTRONIC IGNITION DIGITAL MODELS
(AUTOMATICALLY-LIGHTED PILOT)
FOR YOUR SAFETY READ BEFORE LIGHTING

A. This appliance is equipped with an ignition de- *If you cannot reach your gas supplier, call the
vice which automatically lights the pilot. Do not fire department.
try to light the pilot by hand.
C. Use only your hand to push in or turn the gas
B. BEFORE OPERATING, smell all around the ap- control knob. Never use tools. If the knob will
pliance area for gas. Be sure to smell near the not push in or turn by hand, do not try to repair
floor because some gas is heavier than air and it. Call a qualified service technician. Force or
will settle on the floor. attempted repair may result in a fire or explo-
sion.
WHAT TO DO IF YOU SMELL GAS:
*Do not try to light any appliance. D. Do not use this appliance if any part has been
*Do not touch any electric switch; do not use any under water. Immediately call a qualified ser-
phone in your building. vice technician to inspect the appliance and to
*Immediately call your gas supplier from a neigh- replace any part of the control system and any
bor’s phone. Follow the gas supplier’s instruc- gas control which has been under water.
tions.

LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above. 12. If the appliance will not operate, follow the
2. Set the thermostat to the lowest setting. instructions “To Turn Off Gas To Appliance”
and call your service technician or gas
3. Turn off all electrical power to the appliance.
supplier.
4. This appliance is equipped with an ignition device
HONEYWELL
which automatically lights the pilot. Do not try to light
VR8340 GAS
the pilot by hand. VALVE IID
5. Remove heater door panel.
GAS
6. For Honeywell valve: Turn gas INLET
control knob clockwise to “OFF”.
For Robertshaw valve: Models 266-406: Turn
gas control knob clockwise to “OFF”. Model
206 Push in and move gas control lever counter- ROBERTSHAW 7000
GAS VALVE IID
clockwise to “OFF” position.
7. Wait 5 minutes to clear out any gas. If you then smell
gas, STOP! Follow "B" in the safety information
above. If you don’t smell gas, go to the next step.
8. Turn gas control knob counter-clockwise to “ON”.
(Honeywell VR8340 and Robertshaw 7000)
ROBERTSHAW
9. Replace heater door panel. 7200 GAS CON-
O

TROL LEVER
O
F

10. Turn on all electrical power to the appliance.

SHOWN IN "OFF"
11. Set thermostat to desired setting. POSITION
GAS
INLET

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat at the lowest setting. 4. For Honeywell VR8340 and Robertshaw 7000 gas
valve.
2. Turn off all the electrical power to the appliance if
Turn gas control knob clockwise to “OFF”.
service is to be performed.
Make sure knob rests against stop.
3. Remove heater door panel.
5. Replace heater door panel.

38
10. MAINTENANCE AND CARE Cold Weather Operation
AAWARNING: Check the heater for possible rodent Important Freeze Information
nests after long periods of non-use.
MODERATE CLIMATE: Heater operation can continue
To be followed one month after start-up and then semi- during short-term cold spells. When temperatures are
annually. between 0°F (-18°C) and 32°F (0°C), flow (continuous
pump operation) must be maintained.
1. Inspect top of heater and drafthood for soot, a sticky
black substance around finned tubes and “V” baffles, AA CAUTION: Do not use the heater to maintain
and open flue gas passageways. Any visible soot water temperatures just above freezing or for freeze
should be cleaned for proper operation. protection. When heater is used during freezing weather,
care must be taken to avoid freeze-ups. Continuous
AA CAUTION: Soot may be combustible. Wet sooted pump operation is a must. Additional protection may be
surfaces completely prior to cleaning. Do not use steel required. The heater is not warranted against freeze-ups.
wire brush.
COLD CLIMATE: Prolonged operation with water
2. Clean main burners and pilot burner of dust and lint. temperatures below 50°F (10°C) is not recommended.
3. Inspect and operate all controls, gas valve and When starting the heater with water temperatures below
pressure relief valve (if equipped). 50°F (10°C), operate the heater continuously until higher
temperatures are reached. Operating the heater for
4. Make visual check of the burner and pilot flames.
prolonged periods with pool water below 50°F (10°C)
Yellow flame means restriction of the air openings.
can seriously damage the heater, and is not covered by
Lifting or blowing flame indicates high gas pressure.
the warranty. For cold climate areas, please follow the
Low flame means low gas pressure. Should the
winterizing procedures listed below.
latter occur, shut the heater off and contact your gas
supplier or qualified service agency. See Figure 70 Winterizing the Pool and Spa Heater
and Figure 71.
Heaters installed outdoors in freezing climate areas may be
5. On indoor heaters, clean room intake openings to shut down for the winter. Observe the following procedure
ensure adequate flow of combustion and ventilation for winterizing the heater:
air.
1. Turn off gas valve, manual gas valve, and electrical
AACAUTION: Combustion air must not be contaminated supply to the heater.
by corrosive chemical fumes which can damage the 2. Remove the ProTek Shield™ Assembly located in the
heater and void the warranty. inlet/outlet header, (under water pipes). Remove the
heat exchanger inspection panel on the side opposite
6. Keep area around heater clear and free from
water piping to gain access to the drain plug on the
combustible materials, gasoline and other flammable
return header. Open drain plug on return header. See
and corrosive vapors and liquids.
Figure 73 and Figure 74.
If Heater Will Not Fire:
If you have no electrical power, it may be that your “circuit
breaker” has tripped. Try re-setting it.
If you have electrical power but the heater will not fire
check the following or see "TROUBLESHOOTING" on
page 40.
1. The time clock must be in the “ON” position. DRAIN PLUG
O RING F10672

2. Your pump strainer basket may be full. If so remove Figure 73. Return Header Drain Plug - Residential
debris. ("P" Prefix Model)
3. Your filter may be dirty. If so, backwash or clean
filter. (To tell if your filter is dirty, look to see if the filter
pressure is higher than usual).
4. The pump may have lost its prime and be running
dry. Check the pressure on the filter. If there is no
pressure; then you are not moving water (or your
DRAIN PLUG
gauge is broken). Try to get the pump to run at its F10673

normal flow rate.

Figure 74. Return Header Drain Valve - Commercial
("B" Prefix Model)

39
11. TROUBLESHOOTING
IMPORTANT NOTICE: These instructions are intended for the use of qualified personnel who are specifically trained
and experienced in the installation of this type of heating equipment and related system components. Installation and
service personnel may be required by some states to be licensed. Persons not qualified shall not attempt to install this
equipment nor attempt repairs according to these instructions.

Problem Possible Cause Corrective Action

Harmonics, or whining noise U.G. inoperative....................................... Check movement by putting in hot water (110°F [43°C] or
higher)
*Debris or restriction in system................ Locate the restriction and remove. Flush system and clean
*Debris in gas line................................... Remove debris or blow out gas line
Low flow.................................................. Scale forming in heat exchanger - clean heat exchanger and
check pool pH and total alkalinity
Heater going on and off Dirty filter................................................. Clean or replace filter
continuously
Low water level in pool............................ Raise water level
External bypass setting out of
adjustment............................................... Adjust bypass
*Pressure switch out of adjustment......... Adjust pressure switch
Liming or scale forming in Pool water............................................... See Water Chemistry on page 5
exchanger
Bypassing too much water...................... Inspect bypass for movement, if no movement, replace
U.G. not functioning................................. Replace if no movement when heated
Sooting High flow rates......................................... Reduce by adding manual bypass valve
Adjust manual bypass valve until heater outlet water temp is
between 105°F and 110°F (40°C and 43°C)
U.G. inoperative...................................... Check movement by putting in hot water (110°F [43°C] or
higher). If no movement, replace
*Air starvation.......................................... Refer to installation instructions
*Improper venting.................................... Follow recommended installation instructions
*Insects or debris clogging burner intake
ports........................................................ Clean burners
Pilot outage or “Weak Flame” Low gas pressure.................................... Adjust gas pressure
signal
Restricted/dirty pilot................................. Clean pilot
Weak pilot generator............................... Replace pilot
Yellow lazy flame Low gas pressure.................................... Adjust gas pressure
*Insects or debris clogging burner intake
ports........................................................ Clean burners
Outer jacket very hot (paint *Broken refractory caused by shipping
blistered) damage or improper combustion............. Replace refractory panels
Excessive sooting of heat exchanger...... Determine cause of sooting and correct
Takes too long to heat pool or Under-sized heater.................................. Calculate heating capacity of heater
spa Htr. output (BTUH)
Pool gallonage x 8.33
or refer to heater sizing chart
This does not take into account heat loss due to weather
Filter not running long enough................. Reset time clock
Dirty filter................................................. Clean filter
Gas line or meter undersized.................. Refer to installation instructions
Leaking at well Overacid.................................................. Replace well and maintain proper water chemistry
Leaking at heat exchanger Overacid.................................................. Replace heat exchanger and maintain proper water chemistry
Gasket brittle and leaking - Heater running after pump shuts off........ See Pressure switch adjustment
(overheated)
Refractory damage.................................. Replace refractory
Sooted heater.......................................... Determine cause of sooting and correct
* Indicates symptom which usually occurs on initial start-up.

40
Millivolt - Flow Chart

Light pilot

If pilot burner goes out If pilot burner

If pilot burner remains lit
when main burner lights does not light
or when gas valve knob
Jump across both "TH" is released Check gas supply, gas
wires on gas valves line size, gas pressure.
Also check for insects
Replace Remove both "TH" or debris in pilot output
If main burner fires, If main burner does not
gas wires from gas valve.
remove jumper fire, remove jumper
valve Relight pilot

Jump across pressure

switch terminals If pilot burner stays on If burner does not remain
lit, attach millivolt meter
If main burner fires, If main burner does not and read pilot output
remove jumper fire, remove jumper Problem is a wire or
component short to If above 500mV,
cabinet or low gas replace gas valve
Clean filter Jump across thermostat pressure

Check for adequate water If main burner does If below 500mV, check
flow from filter If main burner fires, NOT fire... gas pressure. Also check
remove jumper
for insects or debris in
Jump across each
the pilot burner
Replace pressure switch high limit and remove
jumper
Replace thermostat
If output is still low,
Replace high limit that replace pilot generator
caused heater to fire

1 Raw Output (700mV± 100)

Pilot generator disconnected from valve (knob
must be held down to keep pilot on).
White – Negative
Red + Positive
2 Pilot Load (500mV± 100)
Pilot generator connected to valve-Power ap-
plied to pilot solenoid.
TP(Thermopile-Robertshaw)
PP(Power Pile-Honeywell)
TH TP – Common
TH PP – Common

3 Main Valve Load (200mV± 100)

Control/Limit circuit closed (All switches “ON”)
TP(Thermopile-Robertshaw)
PP(Power Pile-Honeywell)
TH TP – Common
TH PP – Common

41
Digital - Flow Chart

AAWARNING: HIGH VOLTAGE

For qualified technicians ONLY

NOTE: Some heaters may be equipped with an ignition

module that shuts off pilot gas if pilot fails to light. To
reset, interrupt power to heater.

START
TURN GAS SUPPLY OFF. NOTE: Before troubleshooting, familiarize yourself with the start-up and check-out
TURN THERMOSTAT procedure.
(CONTROLLER) TO CALL
FOR HEAT Check line voltage power, low voltage transformer, limit controller, thermostat
POWER TO PC BOARD? NO (controller) and wiring. Make sure that the line voltage is NOT 208 VAC.
(24 V NOMINAL)
YES
Pull ignition lead and check spark at PC board.
SPARK ACROSS Spark Okay?
IGNITER/SENSOR GAP? NO
YES YES NO Replace the PC board.

• Check ignition cable, ground wiring, ceramic insulator and gap, and correct.
• Check boot of the ignition cable for signs of melting or buckling. Take protective
action to shield cable and boot from excessive temperatures.

• Check that all manual gas valves are open, supply tubing and pressures are
TURN GAS SUPPLY ON good, and pilot burner orifice is not blocked.
PILOT BURNER LIGHTS? NO
• Check electrical connections between PC board and pilot operator on gas control.
YES • Check for 24 VAC across PV-MV/PV terminals on PC board. If voltage is okay,
replace gas control; if not, replace PC board.
NOTE: If PC board goes into lockout, reset system. Lockout is used on L.P.G.
models.

MAIN BURNER LIGHTS? NO • Check for 24 VAC across MV-MV/PV terminals. If no voltage, replace module.
YES • Check electrical connections between PC board and gas control. If okay, replace
gas valve or gas control operator, i.e. pilot gas valve, flow switch etc.

SYSTEM RUNS UNTIL

NO NOTE: IF PC board goes into lockout, reset system.
CALL FOR HEAT ENDS?
YES
• Check continuity of ignition cable and ground wire.

NOTE: If ground is poor or erratic, shutdowns may occur occasionally even though
operation is normal at the time of checkout.
• Check that pilot flame covers flame rod and is steady and blue.
• If checks are okay, replace PC board.
CALL FOR HEAT ENDS
NO • Check for proper thermostat (controller) operation.
SYSTEM SHUTS OFF?
• Remove MV lead at module; if valve closes, recheck temperature controller and
YES
wiring; if not, replace gas valve.

TROUBLESHOOTING
ENDS

42
Control Logic - Flow Chart - Digital
Power On
• Check On/Off switch (under lid on control panel)
Is the water
NO • Check for 120/240 volts to the transformer
temperature displayed?
(time clock, circuit breaker, wire connections)
• Check for 24 volts to Circuit Board (P6 connector)
YES

Push MODE “Remote” and Water Temperature displayed

switch to select (a remote control is controlling the heater)
"Pool" or "Spa"
Note: Disconnect the remote by turning the
remote function off. See page 30 for instructions.
Push Temp
arrow to scroll to
desired temperature NO
Water temperature
NO Is a fault code displayed and flashing?
and set
temperature
displayed? YES

Diagnostic Readouts
“Sensor Failure,” “Sensor Open” or “Sensor Short” -
YES Temperature sensor out of range (replace sensor)
Sensor Failure
Inspect thermister, wires, and connector at Terminal P1
Check resistance value of the thermister. Reference to chart below.
Replace thermister if not within 10% of values shown below.
If okay, replace Circuit Board.
Sensor resistance at various temperatures
“Heating” will Temp Degrees F 40 50 60 70 80 90 100 106
display briefly Temp Degrees C 4 10 15 21 27 32 38 41
Resistance (k) 261.1 199.0 153.1 118.8 93.0 73.3 58.3 51.0
If okay, replace Circuit Board
“Water Sw Open” Pressure switch. Verify water flow and pressure
CLEAN FILTER / STRAINER - backwash if neccessary.
“Spark” “Hi Limit 1 Fault” High limit switch. Verify water flow. Inspect internal
“Hi Limit 2 Fault” Thermostat (Unitherm Governor) and bypass valve.
Press manual button on HL1 fault on brass (ASME) models.
“Rollout Sw Open” Rollout Sensor - Check for blocked heat exchanger and soot.
Flame icon displayed Press manual reset button.
and flashing? “Clock/Fireman Sw” Fireman or Remote switch connected to safety loop is in the
OR OFF mode.
Water temp displayed? “Vent/Field Sw #1” Vent switch open. Check connections to the board.
(pilot lit and rectified) If extractor installed, troubleshoot extractor.
NO
“Ignition Lockout” Ignition lockout. Check power at pilot valve. Check spark (bad
ignition circuit or hi-tension wire). Verify clean pilot orifice and
clearance from igniter to ground rod.
“Ignition Failure” Ignition failure. Verify gas to the heater. Verify valve operation
YES (gas present at tube fitting).

Verify power at MV on P-4 Terminal on digital circuit board.

Heater Fired? NO
Verify power to valve MV voltage. (Replace valve.)

YES
END

43
12. REPLACEMENT PARTS
NOTE: To supply you with the correct part, it is important
that you supply the heater model number, serial number
and type of gas when applicable.

Any part returned for replacement under standard

company warranties must be properly tagged with a return
parts tag, completely filled in with the heater serial number,
model number, etc., and shipped to the Company freight
prepaid.
If determined defective by the Company and within
warranty, a like part or equal substitution will be returned,
freight collect. Credit will not be issued.
MANUFACTURER:

2151 Eastman Avenue

Oxnard, Ca 93030

44
13. ILLUSTRATED PARTS LIST

3-V

I-S

14-M
I3-S

1-V 4-V
2-S

2-V 6-HP

5-HP

7-HP
15-HP
2-HP
3-HP
7-HP 4-HP 6-HP
8-C 3-R I2-S

14-M 6-S

4-S 20-HP

17-HM 7-S
8-S 11-S
10-M 5-C
3-M
9-M 7-C 4-C
2-R
4-S
25-M
18-M
4-M
2-M
11-M
13-M 2-B 5-M
2-J
12-M
3-S
1-G 1-R
14-S
5-S 16-M
16-M
1-J
3-B
5-B 4-B
1-B
10-S

45
 19-M (OPTIONAL)

2-S 6-C
6-C
8-HP
20-M 1-C
8-HP 9-C
6-HM 21-M
27-HM
5-HM
26-HM
2-HM

7-HM 1-M
3-HM

4-HM 28-HM
18-HP
4-S 17-HP
6-M
20-HP

FOR UNITS WITH ASME BRASS HEADERS FROM 12/2019

6-M
6-C (OPTIONAL)
2-S
14-HM
16-HM
13-HM
9-S 15-HM
1-M 2-C
5-HM 6-HM
2-HM

3-C
12-HM
7-HM 4-HM
10-HM
3-HM 4-S 11-HM
8-HM
18-HM
17-HM 9-HM

FOR UNITS WITH ASME CAST IRON HEADERS PRIOR TO 12/2019

46
 19-HP
6-M 1-M
(OPTIONAL) 19-HP 6-M
(OPTIONAL) 19-HP
1-M 6-C 11-HP
11-HP
1-C
8-HP 6-C

18-HP 12-HP 16-HP

8-HP
10-HP
10-HP
16-HP
12-HP
18-HP 15-HP
2-HP
2-HP
13-HP
14-HP 13-HP
17-HP
20-HP
14-HP
17-HP
F O R U NIT S W IT H PO LYM ER H EA D ER S F R OM 10/2019 FOR UNITS WITH POLYMER HEADERS PRIOR TO 10/2019

1-P
2-P
8-P 5-P

7-P
6-P 9-P

3-P

9-P
HONEYWELL MILLIVOLT PILOT HONEYWELL IID ATMOSPHERIC PILOT

19-M

20-M

22-M

21-M

24-M
23-M

22-M

TEXAS CODE OPTION PRIOR TO 12/2019

47
 CALL OUT DESCRIPTION 206A 266A 336A 406A
B BURNER TRAY
1-B Burner Tray w/Burners (sea level)* 010391F 010392F 010393F 010394F
Burner Tray w/o Burners (sea level)* 010395F 010396F 010397F 010398F
Burner Tray w/Gas Valve Nat Millivolt 010399F 010400F 010401F 010402F
Burner Tray w/Gas Valve Pro Millivolt 010403F 010404F 010405F 010406F
Burner Tray w/Gas Valve Nat IID 010407F 010408F 010409F 010410F
Burner Tray w/Gas Valve Pro IID 010411F 010412F 010413F 010414F
2-B Burner Spacer/Hold Down Kit 010415F 010416F 010417F 010418F
3-B Burner 301210/13 301210/18 301210/22 301210/27
4-B Burner Orifice
Natural Gas
Burner Orifice #50* 350079F/13 350079F/18 350079F/22 350079F/27
Burner Orifice #51* 350080F/13 350080F/18 350080F/22 350080F/27
Burner Orifice #52* 350081F/13 350081F/18 350081F/22 350081F/27
Burner Orifice #53* 350347F/13 350347F/18 350347F/22 350347F/27
Propane Gas
Burner Orifice #57* 350083F/13 350083F/18 350083F/22 350083F/27
Burner Orifice #58* 350087F/13 350087F/18 350087F/22 350087F/27
Burner Orifice #59* 350350F/13 350350F/18 350350F/22 350350F/27
Burner Orifice #60* 350351F/13 350351F/18 350351F/22 350351F/27
Burner Orifice #61* 350352F/13 350352F/18 350352F/22 350352F/27
5-B Burner Tray w/o Manifold w/o burners 010421F 010422F 010423F 010424F
C CONTROLS
1-C Thermostat Auto Reset 135 Deg Surface Mount 006725F 006725F 006725F 006725F
2-C AGS 135° (Auto Gas Shut-Off) - Red Epoxy - prior to 12/2019 600892B 600892B 600892B 600892B
3-C High Limit 140° - Black Epoxy - prior to 12/2019 600893B 600893B 600893B 600893B
4-C P.C. Board/Control 013464F 013464F 013464F 013464F
7-C LCD Display
Units manufactured from 5/2011 013640F 013640F 013640F 013640F
8-C Fuse 5 AMP 013733F 013733F 013733F 013733F
5-C Thermostat Control MV Units Mechanical 003346F 003346F 003346F 003346F
6-C Temperature Sensor IID Units 009577F 009577F 009577F 009577F
9-C Thermostat Manual Reset 160 Deg Surface Mount (ASME Only) 016213F 016213F 016213F 016213F
G GAS VALVE
1-G Combination Valve - Nat. MV 003898F 003898F 003898F 003898F
Combination Valve - Pro. MV 003899F 003899F 003899F 003899F
Combination Valve - Nat. IID 003900F 003900F 003900F 003900F
Combination Valve - Pro. IID 004306F 004306F 004306F 004306F
HP HEAT EXCHANGER - POLYMER
1-HP Heat Exchanger Assy Copper ***
Units manufactured from 10/2019 017994F 017995F 017996F 017997F
Units manufactured prior to 10/2019 010043F 010044F 010045F 010046F
Heat Exchanger Assy Cupronickel ***
Units manufactured from 10/2019 017998F 017999F 018000F 018001F
Units manufactured from 7/2013 thru 9/2019 014926F 014927F 014928F 014929F
Units manufactured prior to 7/2013 010356F 010357F 010358F 010359F
2-HP Inlet/Outlet Header Complete
Units manufactured from 10/2019 017959F 017959F 017959F 017959F
Units manufactured prior to 10/2019 006827F 006827F 006827F 006827F
Inlet/Outlet Header (Includes 6-HP)
Units manufactured from 10/2019 017965F 017965F 017965F 017965F
Units manufactured prior to 10/2019 014648F 014648F 014648F 014648F
3-HP Return Header (Includes 6-HP) 015095F 015095F 015095F 015095F
4-HP Tube Bundle Copper ** & *** 010059F 010060F 010061F 010062F
Tube Bundle Cupronickel ** & ***
Units manufactured from 7/2013 014930F 014931F 014932F 014933F
Units manufactured prior to 7/2013 010364F 010365F 010366F 010367F
5-HP Baffle (Copper Heat Exchanger) 010038F 005261F 010040F 010041F
Baffle (Cupronickel Heat Exchanger)
Units manufactured from 6/2013 014934F 014935F 014936F 014937F
Units manufactured prior to 6/2013 010038F 005261F 010040F 010041F
6-HP Flange Nut Kit 008259F 008259F 008259F 008259F
7-HP O Ring Gasket (2) 006713F 006713F 006713F 006713F
8-HP Sensor Adapter Digital Electronic 006714F 006714F 006714F 006714F
Sensor Well Millivolt 006805F 006805F 006805F 006805F
9-HP Bypass Kit 006715F 006715F 006715F 006715F
10-HP Bypass Valve 006716F 006716F 006716F 006716F
11-HP Bypass Dam / Shaft 006717F 006717F 006717F 006717F
12-HP Bypass Spring (All Sizes Included) 006718F 006718F 006718F 006718F
13-HP Unitherm Governor 006719F 006719F 006719F 006719F
14-HP Unitherm Governor Plug 006720F 006720F 006720F 006720F
15-HP Drain Plug 006721F 006721F 006721F 006721F
16-HP Inlet/Outlet Header Dam N/A Use 19-HP N/A Use 19-HP N/A Use 19-HP N/A Use 19-HP
17-HP 2" CPVC Connector & Nut (2) 006723F 006723F 006723F 006723F
18-HP O Ring (2) 006724F 006724F 006724F 006724F
19-HP Inlet/Outlet Header Baffle w/Header Dam 006826F 006826F 006826F 006826F
20-HP ProTek ShieldTM Assembly 017960F 017960F 017960F 017960F
*FOR INSTALLATION AT OVER 2,000 FEET ABOVE SEA LEVEL, DERATE 4% PER I,000 FEET ABOVE SEA LEVEL. Refer to the heater's rating plate.
**WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also
damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and
inspect the bypass assembly. Failure to do so could cause premature failure of this replacement part.
***WARNING: Copper and Cupronickel heat exchangers and tube bundles are not interchangeable. Units with suffix "C" must
48 use copper replacement parts and units with suffix "X" must use Cupronickel replacement parts.
 CALL OUT DESCRIPTION 206A 266A 336A 406A
HM HEAT EXCHANGER - METAL
1-HM Heat Exchanger Assy.Copper ASME
Units manufactured from 12/2019 (Brass) 017983F 017984F 017985F 017986F
Units manufactured prior to 12/2019 (Cast Iron) 010051F 016193F 010053F 010054F
Heat Exchanger Assy.Cupronickel ASME
Units manufactured from 12/2019 (Brass) 017987F 017988F 017989F 017990F
Units manufactured prior to 12/2019 (Cast Iron) 010360F 010361F 010362F 010363F
2-HM Inlet/Outlet Header ASME Complete
Units manufactured from 12/2019 (Brass) 017961F 017961F 017992F 017992F
Units manufactured prior to 12/2019 (Cast Iron) 006730F 006730F 006730F 006730F
Inlet/Outlet Header ASME (Header Only)
Units manufactured from 12/2019 (Brass) 017966F 017996F 017996F 017996F
Units manufactured prior to 12/2019 (Cast Iron) 012319F 012319F 012319F 012319F
15-HM Inlet & Outlet Flange - prior to 12/2019 003766F 003766F 003766F 003766F
16-HM Flange Gasket 1 1/2" Connections - prior to 12/2019 062236B 062236B 062236B 062236B
Flange Gasket 2" Connections - prior to 12/2019 800080B 800080B 800080B 800080B
3-HM Return Header ASME
Units manufactured from 12/2019 (Brass) 017973F 017973F 017973F 017973F
Units manufactured prior to 12/2019 (Cast Iron) 006731F 006731F 006731F 006731F
4-HM Tube Bundle Copper ASME *
Units manufactured from 12/2019 017974F 017975F 017976F 017977F
Units manufactured prior to 12/2019 010055F 006733F 010057F 010058F
Tube Bundle Cupronickel ASME *
Units manufactured from 12/2019 017978F 017979F 017980F 017981F
Units manufactured prior to 12/2019 010368F 010369F 010370F 010371F
5-HM Baffle 010038F 005261F 010040F 010041F
6-HM Stud Bolt Kit
Units manufactured from 12/2019 017982F 017982F 017982F 017982F
Units manufactured prior to 12/2019 007870F 007870F 007870F 007870F
7-HM Header Gasket (9) 800014B 800014B 800014B 800014B
8-HM Unitherm Governor 062234B 062234B 062234B 062234B
9-HM U.G. Retainer Spring 013792F 013792F 013792F 013792F
18-HM U.G. Plug 013738F 013738F 013738F 013738F
10-HM Bypass Valve 016194F 016194F 016194F 016194F
11-HM Bypass Spring
Units with Plastic Bypass Valve (Units manufactured from 3/5/17) 016196F 016196F 016196F 016196F
Units with Brass Bypass Valve (Units manufactured prior to 3/5/17) 013794F 013794F 013794F 013794F
12-HM Drain Valve 013793F 013793F 013793F 013793F
13-HM Sensor Well 003765F 003765F 003765F 003765F
14-HM Well Retaining Clip 300203 300203 300203 300203
17-HM Rear Drain Plug & Cover 005264F 005264F 005264F 005264F
19-HM Adapter CPVC 2" 005393F 005393F 005393F 005393F
26-HM Adapter - ProTek Shield (Includes 27-HM) 018006F 018006F 018006F 018006F
27-HM Nut - ProTek Shield Adapter - 2-Pc 018007F 018007F 018007F 018007F
28-HM U.G./Bypass Assembly 017958F 017958F 017962F 017962F
J CONTROL BOX
1-J Transformer 120/240/24V 006736F 006736F 006736F 006736F
2-J Rocker Switch 009493F 009493F 009493F 009493F
M MISCELLANEOUS COMPONENTS
1-M Pressure Switch 1.75 PSI 006737F 006737F 006737F 006737F
Pressure Switch 11 PSI Special-See Water Pressure Switch Adj. 009133F 009133F 009133F 009133F
2-M Thermostat Knob 009499F 009499F 009499F 009499F
3-M Thermostat Shaft MV 800307 800307 800307 800307
4-M Knobstop 006886F 006886F 006886F 006886F
5-M Thermal Fuse 005899F 005899F 005899F 005899F
6-M PRV
PRV - 75 PSI ASME (Brass) Units manufactured from 12/2019 017957F 017957F 017957F 017957F
PRV - 125 PSI (Optional) 008091F 007224F 007224F 007224F
7-M Deliming Kit 052871F 052871F 052871F 052871F
8-M Wire/Harness Millivolt 010386F 010386F 010386F 010386F
Wire/Harness IID 009490F 009490F 009490F 009490F
9-M Control Bezel MV (Includes Dial Decal) 009489F 009489F 009489F 009489F
10-M Dial Decal MV 009858F 009858F 009858F 009858F
11-M Control Bezel (Includes Switch Decal)
Units manufactured from 5/2011 013491F 013491F 013491F 013491F
Units manufactured prior to 5/2011 009491F 009491F 009491F 009491F
12-M Switch/Decal-Membrane
Units manufactured from 5/2011 013492F 013492F 013492F 013492F
Units manufactured prior to 5/2011 009492F 009492F 009492F 009492F
13-M Control Bezel Cover 009487F 009487F 009487F 009487F
14-M Gasket Insulation (Swaybrace & Jacket Top) 010350F 010350F 010350F 010350F
15-M Touch-up Paint
Green 750125 750125 750125 750125
Dark Gray 750126 750126 750126 750126
Cool Dark Gray 750256 750256 750256 750256
Warm Dark Gray 750258 750258 750258 750258
16-M Tie Down Bracket (Optional) 011636 011636 011636 011636
17-M Texas Code Option (ASME Only) - Units manufactured prior to 12/2019
Flanged Connection (Not Shown) 015889F 015889F 015889F 015889F
NPT Connection (Not Shown) 015890F 015890F 015890F 015890F
19-M Flow Switch 007142F 007142F 007142F 007142F
20-M Flow Switch Paddle 010026F 010026F 010026F 010026F
21-M T & P Gauge 014647F 014647F 014647F 014647F
22-M 2" CPVC Connector (Outlet Plumbing)
NPT Connection 013795F 013795F 013795F 013795F
Flanged Connection 015883F 015883F 015883F 015883F
23-M 2" CPVC Connector & Nut (2) 006723F 006723F 006723F 006723F
24-M O Ring (2) 006724F 006724F 006724F 006724F
18-M PC Board Shield (Optional) 015557F 015557F 015557F 015557F
25-M Gas Line Finish Flange 016160F 016160F 016160F 016160F
*WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also
damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and
inspect the bypass assembly. Failure to do so could cause premature failure of this replacement part.
49
 CALL OUT DESCRIPTION 206A 266A 336A 406A
P PILOT
1-P Pilot Nat. MV 600525B 600525B 600525B 600525B
Pilot Pro. MV 600575B 600575B 600575B 600575B
2-P Pilot Nat & Pro IID 002003F 002003F 002003F 002003F
3-P Pilot Orifice Nat. MV 003901F 003901F 003901F 003901F
Pilot Orifice Pro. MV 003902F 003902F 003902F 003902F
4-P Pilot Orifice Nat. IID .020 003903F 003903F 003903F 003903F
Pilot Orifice Pro. IID .012 004308F 004308F 004308F 004308F
5-P Pilot Generator MV 600019B 600019B 600019B 600019B
6-P Pilot MTG Bracket MV 010352F 010352F 010352F 010352F
7-P Pilot Mounting Bracket IID 306692 306692 306692 306692
8-P Lighter Tube (MV Units Only) 062996 062996 062996 062996
9-P Pilot Tube 004078F 004078F 004078F 004078F
10-P Hi Tension Wire IID with Pilot Electrode N/A N/A N/A N/A
11-P Pilot Shield 010351F 010351F 010351F 010351F
R REFRACTORY
1-R Refractory Common Lt & Rt 010088F 010088F 010088F 010088F
2-R Refractory Uncommon (Front & Rear) 010089F 010090F 010091F 010092F
3-R Refractory Retainer Kit 010387F 010388F 010389F 010390F
S SHEETMETAL
1-S Jacket Top (Louvered) 010047F 010048F 010049F 010050F
2-S Flue Collector (Units with Polymer Header) 010071F 010072F 010073F 010074F
Flue Collector (Units with Metal Header) 010075F 010076F 010077F 010078F
3-S Door Assy
Raypak
Cool Dark & Warm Dark Gray 013859F 013860F 013861F 013862F
Green 010378F 010379F 010380F 010381F
Rheem
Cool Dark & Warm Dark Gray 013863F 013864F 013865F 013866F
Green 010382F 010383F 010384F 010385F
Ruud
Cool Dark & Warm Dark Gray (Units mfd after 9/2012) 013859F 013860F 013861F 013862F
Warm Dark Gray (Units manufactured prior to 9/2012) 013867F 013868F 013869F 013870F
Green 010382F 010383F 010384F 010385F
14-S Screw & Retainer 006744F 006744F 006744F 006744F
4-S Access Panel Set (3 Pcs Units with Polymer Header) 010311F 010311F 010311F 010311F
Access Panel Set - ASME
Access Panel Set (3 Pcs. for BR Header) 017967F 017967F 017967F 017967F
Access Panel Set (3 Pcs. for CI Header) - prior to 12/2019 010312F 010312F 010312F 010312F
5-S Jacket Side Panel Right 010376F 010376F 010376F 010376F
6-S Jacket Side Panel Left 010377F 010377F 010377F 010377F
7-S Jacket Rear Panel (2 Pcs.) 010372F 010373F 010374F 010375F
8-S Poolstat Cover/Lock 009505 009505 009505 009505
9-S High Limit Cover 010319F 010319F 010319F 010319F
10-S Base Heat Shield - prior to 10/2019 010320F 010320F 010320F 010320F
11-S Up Front Control Panel
Green 010321F 010322F 010323F 010324F
Cool Dark Gray 013887F 013888F 013889F 013890F
Warm Dark Gray 013891F 013892F 013893F 013894F
12-S High Limit Shield 010342F 010342F 010342F 010342F
13-S Weather Shield 010325F 010326F 010327F 010328F
V VENTING
1-V Indoor Stack Kit (Includes inner adapter panel) 009838 009839 009840 009841
Outdoor Stack Kit (Includes inner adapter panel) 009834 009835 009836 009837
2-V Stack Adapter 010330F 010331F 010332F 010333F
4-V Outer Stack Adapter 011461F 011462F 011463F 011464F
3-V "Pagoda" Top
Cool Dark Gray 013883F 013884F 013885F 013886F
Green 010334 010335 010336 010337
Atmospheric CONVERSION KITS* 206A 266A 336A 406A
Gas Conversions
Nat. to Pro. MV Pilot 004690B 004690B 004692B 004692B
Pro. to Nat. MV Pilot 010419F 010419F 010420F 010420F
Nat. to Pro. IID Pilot ** ** ** **
Pro. to Nat. IID Pilot ** ** ** **
* Gas conversions are to be done only by a qualified agency.
** Conversion must be made with complete burner tray and gas valve (see item 1-B).

50
NOTE

51
 ISO 9001
REGISTERED QUALITY MANAGEMENT SYSTEM

www.raypak.com

Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (805) 278-5468
Litho in U.S.A.