INSTALLATION INSTRUCTIONS

Fan Coils
WAHL, WAPL, WAXL
These instructions must be read and understood completely before attempting installation.

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and
NOTE Signal Words in Manuals
The signal words DANGER, WARNING, The signal word WARNING is used throughout this
CAUTION, and NOTE are used to identify levels of manual in the following manner:
WARNING
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate ! WARNING
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and The signal word CAUTION is used throughout this
throughout this manual and other manuals that may manual in the following manner:
apply to the product.
DANGER − Immediate hazards which will result in ! CAUTION
severe personal injury or death.
WARNING − Hazards or unsafe practices which Signal Words on Product Labeling
could result in severe personal injury or death. Signal words are used in combination with colors
CAUTION − Hazards or unsafe practices which and/or pictures on product labels.
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.

TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ! WARNING
HEATER PACKAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PERSONAL INJURY, AND/OR PROPERTY DAMAGE
POSITION UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HAZARD
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Failure to carefully read and follow this warning could
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . 7 result in equipment malfunction, property damage,
personal injury and/or death.
REFRIGERANT TUBING . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation or repairs made by unqualified persons could
REFRIGERANT FLOW−CONTROL DEVICE . . . . . . 10 result in equipment malfunction, property damage,
REFRIGERANT METERING DEVICE . . . . . . . . . . . . . 11 personal injury and/or death.
CONDENSATE DRAINS . . . . . . . . . . . . . . . . . . . . . . . . 11 The information contained in this manual is intended for
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 use by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test
SEQUENCE OF OPERATIONS . . . . . . . . . . . . . . . . . . 12 instruments.
START−UP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . 13 Installation must conform with local building codes and
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 13 with the National Electrical Code NFPA70 current
edition.
AIRFLOW PERFORMANCE TABLES . . . . . . . . . . . . . 14
AIRFLOW PERFORMANCE . . . . . . . . . . . . . . . . . . . . 14
R−410A QUICK REFERENCE GUIDE . . . . . . . . . . . . 17

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

INTRODUCTION ! WARNING
Models WAHL, WAPL, WAXL are for R−410A refrigerant.
FIRE HAZARD
These units leave the factory compliant with low leak
requirements of less than 2% cabinet leakage rate at 0.5 Failure to maintain proper clearances could result in
personal injury, death, and/or property damage.
inches W.C. and 1.4% cabinet leakage rate at 0.5 inches
W.C. when tested in accordance with ASHRAE 193 When heaters are installed, maintain clearances from
combustible materials as specified on unit rating plate.
standard. Do not use plastic lined or combustible flexible ducting
All models are designed for maximum flexibility and can be within 36 inches of the supply end of the fan coil.
used for upflow, horizontal left or right, and downflow
REQUIRED CLEARANCES − ALL MODELS inches (mm)
applications (accessory kit required for downflow).
No All Sides 0
WAPL models are available for system sizes 1−1/2 through
4 tons (18,000 − 48,000 BTUH) nominal cooling capacity. Heaters From Supply Duct 0
All models use an ECM integral electronically commutated All Sides 0
motor for efficiency and use a piston metering device. From First 3 feet of Supply Duct to
With 1 (25)
WAHL and WAXL models are available for system sizes Combustibles
Heaters
1−1/2 through 5 tons (18,000 − 60,000 BTUH) nominal From Supply Duct to Combustibles after
0
cooling capacity. All models use an ECM integral 3 feet
electronically communtated motor for efficiency and have
a factory installed and appropriately sized hard shut−off HEATER PACKAGES
TXV metering device are for R−410A refrigerant ONLY.
Factory approved, field installed, UL listed heater
All models require a field supplied air filter. Factory packages are available from the equipment supplier. See
approved electric heater packages are available in sizes unit rating plate for a list of factory approved heaters.
5kW through 30kW. See Product Specification literature for Heaters that are not factory approved could cause damage
available accessory kits which would not be covered under the equipment warranty.
LOCATION POSITION UNIT
Select the best position which suits the installation site
conditions. The location should provide adequate structural Unit can stand or lie on floor, or hang from ceiling or wall.
support, space in the front of the unit for service access, Allow space for wiring, piping, and servicing unit.
clearance for return air and supply duct connections, space
for refrigerant piping connections and condensate drain
line connections. If heaters are being installed make sure ! CAUTION
adequate clearance is maintained from supply duct work. PROPERTY DAMAGE HAZARD
See clearances below.
Failure to follow this caution may result in property
NOTE: If the door gasket is damaged or missing, the unit damage
may not meet the ASHRAE 193 standard for cabinet air A field fabricated auxiliary drain pan, with a separate
leakage. Contact your supplier and order kit #1191140. drain is REQUIRED for all installations over a finished
Nuisance sweating may occur if the unit is installed in a high living space or in any area that may be damaged by
humidity environment with low airflow. On these installations a overflow from a restricted main drain pan. In some
wrap of 2″ (51mm) fiberglass insulation with a vapor barrier is localities, local codes require an auxiliary drain pan for
recommended. ANY horizontal installation.
NOTE: Internal filter can be accessed from separate filter A. UPFLOW INSTALLATION
door. If the filter can NOT be easily accessed, a remote filter
is recommended. Refer to ACCA Manual D for remote filter If return air is to be ducted through a floor, set unit on floor
sizing. over opening and use 1/8 to 1/4 inch thick (3 to 6 mm thick)
fireproof resilient gasket between duct, unit, and floor.
Side return is a field option on slope coil models. Cut
opening per dimensions shown in Figure 1. A
field−supplied bottom closure is required.

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Figure 1 Upflow Installation

POWER ENTRY FIELD SUPPLIED
OPTIONS SUPPLY DUCT

LOW VOLT
ENTRY
OPTIONS
FRONT SERVICE CLEARANCE
18 − 48 models = 21” (533 mm)
60 model = 24” (610 mm)

A−COIL
UNITS

UPFLOW/DOWNFLOW
SECONDARY DRAIN 1½”

UPFLOW/DOWNFLOW
PRIMARY DRAIN 19” (483mm)

FIELD MODIFIED
A SIDE RETURN
LOCATION FOR
2½” SLOPE COIL
(64mm) UNITS ONLY

UPFLOW/DOWNFLOW
SECONDARY DRAIN

UPFLOW/DOWNFLOW FIELD SUPPLIED

PRIMARY DRAIN RETURN PLENUM

SLOPE COIL UNITS In this application, field conversion of the evaporator coil is
required using accessory Downflow Kit along with an
MODEL A
accessory Base Kit. Set unit on floor over opening and use
WAHL18, WAPL18, WAPL244A, 12” (305mm) 1/8” to 1/4” thick fireproof resilient gasket between duct,
WAHL244B unit, and floor. Refer to installation instructions packaged
WAXL18, WAXL24, WAHL244C, WAHL30, 17” (432mm) with accessory kit. See Product Specification literature for
WAPL30, WAHL36, WAPL36 kit part numbers.
WAXL30 19” (483mm) During the conversion process, removed the plastic cap
covering the vertical drains only and discard.
B. DOWNFLOW INSTALLATION
Remove the plug from the overflow hole and discard.
At completion of the downflow installation, caulk around the
! CAUTION vertical pan fitting to door joint to retain low air leak
performance of the unit.
PRODUCT OR PROPERTY DAMAGE HAZARD NOTE: Gasket kit number (EBAC01GSK) is also required
Failure to follow this caution may result in product or for all downflow applications to maintain low air leak/low
property damage sweat performance.
The conversion of the fan coil to downflow requires C. MODULAR UNITS
special procedures for the condensate drains on both The WAXL60 fan coil is a two−piece modular unit. This
A−coil and Slope−coil units. The vertical drains have an allows the unit to be disassembled and components moved
overflow hole between the primary and secondary drain
separately to the installation area for reassembly. This
holes. This hole is plugged for all applications except
process accommodates small scuttle holes and limiting
downflow, and must be used for downflow.
entrances to installation sites (refer to Figure 2).
Failure to follow instructions could result in personal
injury or product and property damage.

496 01 7202 04 Specifications are subject to change without notice. 3

 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL
C. HORIZONTAL INSTALLATION All models are factory built for horizontal left installation
Unit must NOT be installed with access panels facing up or (refer to Figure 3 and Figure 4). They can be field
down. Access panels must only face to the side. converted to horizontal right (accessory Gasket Kit
required, see Product Specification literature for part
Figure 2 Modular Unit Assembly number). Refer to Figure 5 and Figure 6.
NOTE: When suspending unit from ceiling, dimples in
casing indicate suitable location of screws for mounting
metal support straps (refer to Figure 3).
NOTE: For optimum condensate drainage performance in
horizontal installations, unit should be leveled along its
length and width.
BLOWER BOX

2 SCREWS
2 SCREWS

REAR CORNER
BRACKET

2 SCREWS
COIL BOX

Figure 3 Slope Coil In Horizontal Left Application (factory configuration)

A−COIL
HORIZONTAL LEFT

FIELD
SUPPLIED
HANGING
STRAPS SECONDARY PRIMARY
DRAIN DRAIN

FRONT SERVICE CLEARANCE

(FULL FACE OF UNIT)
SECONDARY 18 − 48 models = 21” (533mm)
DRAIN 60 model = 24” (610mm)

LOW VOLT
ENTRY
OPTIONS

1¾” (45mm)
FILTER ACCESS
CLEARANCE

POWER PRIMARY
ENTRY DRAIN
OPTIONS

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Figure 4 A−Coil in Horizontal Left Application (factory configuration)

COIL
FACTORY SHIPPED BRACKET
HORIZONTAL LEFT
APPLICATION
COIL
SUPPORT
RAIL
B
C DRAIN PAN
SUPPORT
BRACKET

COIL
BRACKET

HORIZONTAL
DRAIN PAN PRIMARY DRAIN
AIR SEAL HORIZONTAL LEFT
ASSEMBLY SECONDARY DRAIN
HORIZONTAL LEFT
REFRIGERANT
CONNECTIONS

Horizontal Right Conversion of Units With Slope Coils 5. Attach coil to casing flange using coil mounting
screw previously removed.
1. Remove blower and coil access panel and fitting
panel (refer to Figure 5). 6. Align holes with tubing connections and condensate
pan connections, and reinstall access panels and
2. Remove coil mounting screw securing coil assembly
fitting panel. After brazing, make sure liquid and
to right side casing flange.
suction tube grommets are in place to prevent air
3. Remove coil assembly. leaks and cabinet sweating.
4. Lay fan coil unit on its right side and reinstall coil assembly
with condensate pan down (refer to Figure 5).
Figure 5 Conversion for Horizontal Right Applications − Slope Coil

COIL MOUNTING BLOWER

SCREW ASSEMBLY

COIL SUPPORT RAIL

SLOPE COIL

DRAINPAN REFRIGERANT PRIMARY DRAIN

CONNECTIONS

SECONDARY DRAIN

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL
Horizontal Right Conversion of Units With A−Coils e. Remove condensate troughs (C) and install on
1. Remove blower and coil access panel and fitting opposite tube sheets.
panel (refer to Figure 6). f. Install hose onto plastic spout.
2. Remove coil mounting screw securing coil assembly 7. Install horizontal pan on right side of coil assembly.
to right side casing flange.
8. Slide coil assembly into casing. Be sure coil bracket
3. Remove coil assembly. on each corner of vertical pan engages coil support
4. Lay fan coil unit on its right side and reinstall coil rails.
assembly with condensate pan down (refer to 9. Reinstall 2 snap−in clips to correctly position and
Figure 6).
secure coil assembly in unit. Be sure clip with large
5. Remove horizontal drain pan support bracket from offsets is used on right side of unit to secure
coil support rail on left side of unit and reinstall on coil horizontal pan.
support rail on right side of unit.
10. Remove 2 oval coil access panel plugs and reinstall
6. Convert air−seal assembly for horizontal right (refer into holes on left side of coil access panel and fitting
to Figure 6). panel.
a. Remove air−seal assembly from coil by removing 11. Remove insulation knockouts on right side of coil
4 screws.
access panel
b. Remove coil drip flanges from A−coil and reinstall
on right side of coil (same side as horizontal drain 12. Reinstall access fitting panels, aligning holes with
pan). tubing connections and condensate pan
connections. Be sure to reinstall metal clip between
c. Remove filler plate (A) and install air splitter (B) in fitting panel and vertical condensate pan.
place of filler plate.
13. After brazing, make sure liquid and suction tube
d. Install filler plate (A) as shown in horizontal right
grommets are in place to prevent air leaks and
application.
cabinet sweating.
Figure 6 Conversion for Horizontal Right Applications − A−Coil

A
REFRIGERANT AIR SEAL
CONNECTIONS ASSEMBLY
HORIZONTAL
RIGHT
APPLICATION
COIL
SUPPORT
RAIL

B
C
COIL
BRACKET

DRAIN PAN
SUPPORT
BRACKET
COIL
SUPPORT
RAIL

COIL
BRACKET
HORIZONTAL
DRAIN PAN
PRIAMRY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Mobile Home or Manufactured Removal of Brackets on

Figure 7 Figure 8
Housing Applications Modular Units

4” (102mm) MAX
SECURE FAN COIL TO STRUCTURE
UNIT AWAY FROM WALL
PIPE STRAP
(TYPICAL BOTH SIDES)
OR
UNIT AGAINST WALL
1/8” (3mm) INCH THICK ANGLE BLOWER BOX
MOUNTING BRACKET
(TYPICAL BOTH SIDES)

2 SCREWS
2 SCREWS

REAR CORNER
BRACKET
DOWN FLOW
BASE KIT

2 SCREWS
SECURE UNIT TO FLOOR
COIL BOX
ANGLE BRACKET OR PIPE STRAP

4” (102mm) MAX

D. MANUFACTURED HOUSING AND MOBILE HOME

APPLICATIONS
1. Fan coil unit must be secured to the structure using
field−supplied hardware.
2. Allow a minimum of 24 inches (610mm) clearance AIR DUCTS
from access panels.
3. Recommended method of securing for typical Connect supply−air duct over the outside of ¾” flanges
applications: provided on supply−air opening. Secure duct to flange
using proper fasteners for type of duct used, and seal
a. If fan coil is away from wall, attach pipe strap to top
duct−to−unit joint.
of fan coil using No. 10 self tapping screws. Angle
strap down and away from back of fan coil, remove It is a recommendation, but not a requirement, to use
all slack, and fasten to wall stud of structure using flexible connections between ductwork and unit to prevent
5/16” lag screws. Typical both sides of fan coil. transmission of vibration. When electric heater is installed,
b. If fan coil is against wall, secure fan coil to wall stud use heat−resistant material for flexible connector between
using 1/8” (3mm) wide right−angle brackets. duct work and unit at discharge connection. Duct work
Attach brackets to fan coil using No. 10 self tapping passing through unconditioned space must be insulated
screws and to wall stud using 5/16” lag screws and covered with vapor barrier.
(refer to Figure 7). Duct work Acoustical Treatment
NOTE: Modular units can be disassembled and Metal duct systems that do not have a 90 degree elbow and
components moved separately to installation area for 10 feet of main duct before first branch takeoff may require
reassembly. This process accommodates small scuttle internal acoustical insulation lining. As an alternative,
holes and limiting entrances to installation sites (refer to fibrous duct work may be used if constructed and installed
Figure 8). in accordance with the latest edition of SMACNA
construction standard on fibrous glass ducts. Both
acoustical lining and fibrous duct work shall comply with
National Fire Protection Association as tested by UL
Standard 181 for Class 1 air ducts.

496 01 7202 04 Specifications are subject to change without notice. 7

 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

ELECTRICAL CONNECTIONS B. 24V CONTROL SYSTEM

Connection to Unit
Fan coils do not have a printed circuit board (PCB), they have
a low voltage circuit protective fuse (3 amp) inline on the wire Wire low voltage in accordance with wiring label on the
harness. Speed selections are made at the fan motor with the blower (also refer to NO TAG through Figure 11). Use 18
Blue wire. The motor is preprogrammed with the time−delay AWG color−coded, insulated (35 ° C minimum) wire to
circuit on some of the speed taps. (See Section D) make the low−voltage connections between the
thermostat, the unit, and the outdoor equipment. If the
Before proceeding with electrical connections, make certain thermostat is located more than 100 feet from the unit (as
that supply voltage, frequency, phase, and circuit ampacity measured along the low voltage wire), use 16 AWG
are as specified on the unit rating plate. See unit wiring label color−coded, insulated (35 ° C minimum) wire. All wiring
for proper field high and low voltage wiring. must be NEC Class 1 and must be separated from
! WARNING incoming power leads. Refer to outdoor unit wiring
instructions for additional wiring recommendations.
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD Heater Staging
Failure to follow this warning could result in personal If electric heat staging is required, a multi−stage heating
injury, death, and/or unit damage. room thermostat is required. Consult with your equipment
supplier for a suitable thermostat.
If a disconnect switch is to be mounted on unit, select a
location where drill and fasteners will not contact Manufactured Housing
electrical or refrigeration components. In manufactured housing applications, the Code of Federal
Regulations, Title 24, Chapter XX, Part 3280.714 requires
Make all electrical connections in accordance with the NEC that supplemental electric heat be locked out at outdoor
and any local codes or ordinances that may apply. Use temperatures above 40_F (4_C), except for a heat pump
copper wire only. The unit must have a separate branch defrost cycle. Refer to Figure 11 for typical low voltage
electric circuit with a field−supplied disconnect switch wiring with outdoor thermostat.
located within sight from and readily accessible from the
unit. Wiring Layout − Air Conditioning
Figure 9
Unit (Cooling and 1−Stage Heat)
NOTE: When a pull−out type disconnect is removed from
the unit, only the Load side of the circuit is de−energized. THERMOSTAT FAN COIL
The Line side remains live until the main (remote)
disconnect is turned off. R
RED
R

G GRY G

! WARNING W W2
BLU
W3
ELECTRICAL SHOCK HAZARD
VIO
E
Failure to follow this warning could result in personal
BRN AIR COND.
injury or death. C

Turn off the main (remote) disconnect device before C

working on incoming (field) wiring . Y Y

Incoming (field) wires on the line side of the disconnect
found in the fan coil unit remain live, even when the
pull−out is removed. Service and maintenance to
incoming (field) wiring cannot be performed until the Wiring Layout − Heat Pump Unit
main disconnect switch (remote to the unit) is turned off. Figure 10 (Cooling and 2−Stage Heat with No
Outdoor Thermostat)
A. LINE VOLTAGE CONNECTIONS
THERMOSTAT FAN COIL HEAT PUMP
Fan coils installed without electric heat require the use of a (CONTROL)
factory−authorized Power Plug Kit (accessory part number R
RED
R
R
EBAC01PLG). This kit provides the electrical connections GRY
G G
necessary to supply the unit with 208/230V power when BRN
electric heat is not present. For units without electric heat: C C
C
WHT W
1. Connect 208/230V power leads from field W2
BLU
2
W3
disconnect to yellow and black stripped leads on E VIO
Power Plug (accessory part number EBAC01PLG). E
L W2
2. Connect ground wire to unit ground lug.
O O
3. When installing an electric heater, remove and
discard power plug (if equipped) from fan coil and Y Y
connect male plug from heater to female plug from
unit wiring harness. (See Electric Heater Installation
Instructions.)

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Wiring Layout − Heat Pump Unit Fan speed is selected at the motor connector. Units with or
Figure 11 (Cooling and 2−Stage Heat for without electric heaters require a minimum CFM. Refer to
Manufactured Housing) the unit wiring label to ensure that the fan speed selected
THERMOSTAT HEAT PUMP is not lower than the minimum fan speed indicated.
FAN COIL (CONTROL)

R R R
SPEED TAP SELECTION AT MOTOR CONNECTOR
G G Tap 1 Low 90 sec off delay
C C C Tap 2 Medium 90 sec off delay
W2 W2 W2 Tap 3 High 90 sec off delay
W3
E E
Tap 4 Electric Heat † 0 sec off delay
ODTS
L Tap 5 Max ‡ 0 sec off delay
O
O † Electric heat airflow is same CFM as Tap 3, but with 0
Y Y sec off delay.
‡ For high static applications, see Airflow Performance
Tables for max airflow.
Transformer Information
To change motor speeds disconnect the BLUE fan lead
Transformer is factory wired for 230V operation. For 208V
from motor connector terminal #2 (factory default position)
applications, disconnect the black wire from the 230V terminal
and move to desired speed−tap; 1, 2, 3, or 5.
on transformer and connect it to the 208V terminal (refer to
Speed−taps 1, 2, and 3 have a 90 second blower off time
Figure 12).
delay pre−programmed into the motor. Speed tap 4 is used
Figure 12 Transformer Connections for electric heat only (with 0 second blower time delay) and
SECONDARY the WHITE wire should remain on tap 4. Speed−tap 5 is
used for high static applications, but has a 0 second blower
time delay pre−programmed into the motor (see Airflow
Performance Tables for actual CFM for each tap). Also, see
BROWN Figure 13 for motor speed selection location.
NOTE: In low static applications, lower motor speed tap
RED
should be used to reduce possibility of water being blown off
coil.
C

YELLOW
Figure 13 Motor Speed Selection
208

230

BLACK

PRIMARY

C. GROUND CONNECTIONS 1 2 3 4 5

! WARNING
ELECTRICAL SHOCK HAZARD
Failure to establish uninterrupted or unbroken ground
could result in personal injury and/or death.
According to NEC, ANSI/NFPA 70, and local codes, the
cabinet must have an uninterrupted or unbroken ground
in order to minimize potential for personal injury or death
if an electrical fault should occur. The ground may Speed Taps may be located on motor,
consist of electrical wire or metal conduit when installed or on plug close to motor.
in accordance with existing electrical codes. If conduit
connection uses reducing washers, a separate ground
wire must be used.

NOTE: Use UL listed conduit and conduit connectors for 1 2 3 4 5

connecting supply wire(s) to unit to obtain proper grounding.
Grounding may also be accomplished by using grounding
lugs provided in control box.
D. MINIMUM CFM AND MOTOR SPEED SELECTION
C LG N

Units with or without electric heaters require a minimum CFM.

L11S018
Refer to the unit wiring label to ensure that the fan speed
selected is not lower than the minimum fan speed indicated.
NOTE: In low static applications, lower motor speed tap
should be used to reduce possibility of water being blown off
coil.

496 01 7202 04 Specifications are subject to change without notice. 9

 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

REFRIGERANT TUBING
Refrigerant Tubing Connection and Evacuation
! CAUTION
Use accessory tubing package or field−supplied tubing of PRODUCT DAMAGE HAZARD
refrigerant grade. Suction tube must be insulated. Do not
Failure to follow this caution may result in product or
use damaged, dirty, or contaminated tubing because it may
property damage.
plug refrigerant flow−control device. ALWAYS evacuate the
coil and field−supplied tubing to 500 microns before Wrap a wet cloth around rear of fitting to prevent damage
opening outdoor unit service valves. to piston assembly or TXV and factory−made joints.

! CAUTION REFRIGERANT FLOW−CONTROL

DEVICE
PRODUCT DAMAGE HAZARD
WAPL models:
Failure to follow this caution may result in product or
property damage. These units come equipped with a factory installed Piston
metering device with Teflon ring. If a piston replacement if
A brazing shield MUST be used when tubing sets are being required, check piston size shown on indoor unit rating
brazed to the unit connections to prevent damage to the plate to see if it matches required outdoor piston size. The
unit surface and condensate pan fitting caps. outdoor piston size will be found on the outdoor unit rating
Units have sweat suction and liquid tube connections. plate, specification sheet or installation instructions
Make suction tube connection first. depending on the model shown on outdoor unit rating plate.
1. Cut tubing to correct length. If the fan coil piston does not match, replace indoor piston
2. Insert tube into sweat connection on unit until it with correct outdoor piston. With some outdoor units a
bottoms. piston is shipped with outdoor unit.
3. Braze connection using silver bearing or non−silver When changing piston, use a back−up wrench. Hand
bearing brazing materials. Do not use solder tighten hex nut, then tighten with wrench 1/2 turn. Do not
(materials which melt below 800_F / 427_C). Consult exceed 30 ft−lbs.
local code requirements. NOTE: The indoor piston contains a Teflon ring (or seal)
4. Evacuate coil and tubing system to 500 microns which is used to seat against the inside of distributor body,
using deep vacuum method. and must be installed properly to ensure proper seating in
Size and install refrigerant lines according to information the direction for cooling operation.
provided with outdoor unit. Route refrigerant lines to the fan
Always use outdoor units designed to match indoor fan coil
coil in a manner that will not obstruct service access to the
applications.
unit or removal of the filter.
1. Find the liquid tube grommet in the small−parts bag
and slide it onto the liquid refrigerant line (field
line−set).
! CAUTION
2. Remove the lower door. Remove the tubing plate PRODUCT DAMAGE HAZARD
(with suction tube grommet) and slide the plate with
grommet onto the refrigerant lines (field line−set), Failure to follow this caution may result in product
away from braze joints. damage.
3. Remove rubber plugs from coil stubs using a pulling This Fan Coil has a hard shut−off TXV metering device.
and twisting motion. Hold coil stubs steady to avoid A compressor Hard Start Kit is REQUIRED in all
bending or distorting. applications where the matching outdoor unit has a
4. Wrap TXV and nearby tubing with a heat−sinking single−phase reciprocating compressor.
material such as a wet cloth.
5. Fit refrigerant lines into coil stubs. Wrap a heat
sinking material such as a wet cloth behind braze
joints.
6. Braze using a Sil−Fos or Phos−copper alloy.
7. After brazing, allow joints to cool. Slide tubing plate
back into place and position grommets around
suction and liquid tubes to ensure air seal.

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Figure 14 Refrigerant Flow−Control Device properly sized condensate traps (refer to Figure 15).
Factory approved condensate traps are available
BRASS DISTRIBUTOR (accessory part number EBAC01CTK).
HEX NUT TEFLON SEAL To connect drain lines, the drain connection knock−outs
TEFLON RING must be removed. Use a knife to start the opening near the
tab and using pliers, pull the tab to remove the knock−out.
Clean the edge of the opening if necessary. After drain
fittings are installed, caulk the seam between the fitting and
PISTON the cover to retain the low leak rating of the unit.
It is recommended the PVC fittings be used on the plastic
FLOW IN condensate pan. Do not over−tighten. Finger−tighten plus
COOLING
1−1/2 turns. Use pipe dope, to ensure proper seal.
BRASS
PISTON
RETAINER
HEX BODY Install traps in the condensate lines as close to the coil as
possible (refer to Figure 17), but avoid blocking filter
access panel.
Install drain lines below the bottom of the drain pan and
pitch the drain lines down from the coil at least 1/4 inch per
STRAINER
foot of run (6mm per 0.3m). Horizontal runs over 15 feet
(5m) long must also have an anti−siphon air vents (stand
pipes), installed ahead of the horizontal runs. Extremely
long horizontal runs may require oversized drain lines to
eliminate air trapping.
REFRIGERANT METERING DEVICE Route primary drain line to the outside or to a floor drain.
WAHL and WAXLmodels have a factory installed hard Check local codes before connecting to a waste (sewer)
shut−off TXV designed only for use with R−410A line.
refrigerant. Use only with outdoor units designed for Route the secondary drain line to a place in compliance with
R−410A. local installation codes where it will be noticed when unit is
TXV is factory set and not field adjustable. operational. Condensate flowing from secondary
(overflow) drain indicates a plugged primary drain − unit
requires service or water damage will occur.
! CAUTION Prime all traps, test for leaks, and insulate in areas where
sweating of the traps and drain lines could potentially cause
PRODUCT DAMAGE HAZARD water damage. Consult local codes for additional
Failure to follow this caution may result in product requirements or precautions.
damage. If a gravity drain cannot be used, install a condensate pump.
This Fan Coil has a hard shut−off TXV metering device. Install the pump as close to the indoor section as possible.
A compressor Hard Start Kit is REQUIRED in all
applications where the matching outdoor unit has a
single−phase reciprocating compressor.
! CAUTION
PRODUCT or PROPERTY DAMAGE HAZARD

! CAUTION Failure to follow this caution may result in product or

property damage.
PRODUCT OPERATION HAZARD Use only full size P−traps in the condensate line (refer to
Failure to follow this caution may result in improper Figure 15). Shallow, running traps are inadequate and
product operation. DO NOT allow proper condensate drainage (refer to
If using a TXV in conjunction with a single−phase Figure 16).
reciprocating compressor, a compressor start capacitor
and relay are required. Consult outdoor unit pre−sale Figure 15 Recommended Condensate Trap
literature for start assist kit part number.

CONDENSATE DRAINS UNIT

Unit is provided with primary and secondary 3/4” (19mm) 2” MIN

NPT drain connections. Refer to Figure 1, Figure 3,
Figure 4, Figure 5, and Figure 6 to identify the primary 2” MIN
and secondary locations. To prevent property damage and
achieve optimum drainage performance, BOTH primary
and secondary drain lines should be installed and include

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INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Figure 16 Insufficient Condensate Trap ACCESSORIES

A. HUMIDIFIER
Connect humidifier and humidistat to fan coil unit as shown
in Figure 18 and Figure 19.

SEQUENCE OF OPERATIONS
A. CONTINUOUS FAN
Thermostat closes R to G. G sends signal direct to motor
which completes circuit to indoor blower motor. When G is
de−energized, there is a 90 second off delay before relay
DO NOT USE SHALLOW RUNNING TRAPS! opens (based on speed tap selected).
Wiring Layout of Humidifier to Heat
Figure 18
Figure 17 Condensate Drain Pump
THERMOSTAT FAN COIL HEAT PUMP
(CONTROL)
R RED R
R
GRY
G G
BRN
C C
C
W2 WHT W
WHT 2
BLU
W3
E VIO
FILTER E
ACCESS
PANEL L W2

SECONDARY DRAIN WITH O O

APPROPRIATE TRAP REQUIRED
(USE FACTORY KIT OR Y Y
FIELD−SUPPLIED TRAP)

PRIMARY TRAP REQUIRED (USE FACTORY KIT OR FAN HUMIDIFIER RELAY

FIELD−SUPPLIED TRAP OF PROPER DEPTH.
STANDARD P−TRAPS ARE NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED CONDENSATE TRAP) 115V M

HUMIDISTAT

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

Wiring Layout of Humidifier to Fan E. ELECTRIC HEAT OR EMERGENCY HEAT MODE

Figure 19
Coil with Electric Heat Thermostat closes R to W. W which completes circuit to
heater element(s). Blower motor is energized through
THERMOSTAT FAN COIL normally closed contacts on fan relay. When W is
RED
de−energized, electric heat relay(s) opens.
R R

G
GRY
G
START−UP PROCEDURE
WHT Refer to outdoor unit Installation Instructions for system
W W2
WHT
start−up instructions and refrigerant charging method
BLU
W3 details.
VIO
E
CARE AND MAINTENANCE
The system should be regularly inspected by a qualified
BRN AIR COND.
C service technician. Consult the servicing dealer for
recommended frequency.
C
Between visits, the only consumer service recommended
Y Y or required is air filter maintenance and condensate drain
operation.
HUMIDISTAT
Air Filter
Inspect air filters at least monthly and replace or clean as
required. Disposable type filters should be replaced.
115V M Reusable type filters may be cleaned by soaking in mild
detergent and rinsing with cold water. Install filters with the
arrows on the side pointing in the direction of air flow.
Condensate Drain
B. COOLING MODE
During the cooling season check at least monthly for free
Thermostat energizes R to G, R to Y, and R to O (heat pump flow of drainage and clean if necessary.
only). G sends signal direct to motor which completes circuit
to indoor blower motor. When G is de−energized, there is a
90 second off delay before fan relay opens (based on speed ! CAUTION
tap selected).
C. HEAT PUMP HEATING MODE PRODUCT DAMAGE HAZARD
Thermostat energizes R to G and R to Y. G sends signal Failure to follow this caution may result in poor unit
direct to motor which completes circuit to indoor blower motor. performance and/or product damage.
When G is de−energized, there is a 90 second off delay Never operate unit without a filter. Factory authorized
before fan relay opens (based on speed tap selected). filter kits must be used when locating the filter inside the
D. HEAT PUMP HEATING WITH AUXILIARY unit. For those applications where access to an internal
ELECTRIC HEAT filter is impractical, a field−supplied filter must be
installed in the return duct system.
Thermostat energizes R to G, R to Y, and R to W. G
completes circuit to indoor blower motor. W completes
circuit to heater element(s). When W is de−energized,
electric heat relay(s) open, turning off heater elements.
When G is de−energized there is a 90 second off delay
before fan relay opens (based on speed tap selected).

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

WAHL, WAPL AIRFLOW PERFORMANCE TABLES

AIRFLOW PERFORMANCE − CFM at a given Speed and Static reading
Total Static (inches water column)
Model Blower Speed 0.10 0.20 0.30 0.40 0.50 0.60
Tap 5 767 739 702 669 620 565
Tap 4 614 569 534 486 436 398
WAHL184B Tap 3
WAPL184A 701 660 616 581 537 499
Tap 2 614 569 534 486 436 398
Tap 1 410 350 304 261 228 203
Tap 5 969 936 892 835 763 676
Tap 4 826 795 766 743 706 660
WAHL244C Tap 3
WAPL244A 826 795 766 743 706 660
Tap 2 701 660 616 581 537 499
Tap 1 617 592 552 507 472 420
Tap 5 1108 1090 1065 1034 1009 974
Tap 4 1026 1000 969 938 899 865
WAHL304B Tap 3
WAPL304A 1026 1000 969 938 899 865
Tap 2 909 873 842 799 762 724
Tap 1 825 795 757 722 674 634
Tap 5 1301 1276 1245 1218 1176 1121
Tap 4 1227 1191 1169 1143 1105 1074
WAHL364B Tap 3
WAPL364A 1227 1191 1169 1143 1105 1074
Tap 2 1087 1062 1030 1001 966 930
Tap 1 1026 1000 969 938 899 865
Tap 5 1560 1544 1507 1464 1424 1358
Tap 4 1419 1397 1358 1320 1279 1239
WAHL424B Tap 3
WAPL424A 1419 1397 1358 1320 1279 1239
Tap 2 1249 1220 1184 1142 1093 1052
Tap 1 1242 1205 1158 1110 1069 1026
Tap 5 1743 1712 1679 1642 1610 1574
Tap 4 1669 1634 1599 1564 1531 1499
WAHL484B Tap 3
WAPL484A 1669 1634 1599 1564 1531 1499
Tap 2 1452 1413 1377 1339 1308 1271
Tap 1 1300 1256 1221 1182 1142 1101
Tap 5 1897 1867 1836 1808 1774 1736
Tap 4 1817 1785 1757 1724 1693 1655
WAHL604B Tap 3 1817 1785 1757 1724 1693 1655
Tap 2 1657 1621 1589 1557 1518 1474
Tap 1 1443 1412 1377 1332 1286 1243
- Airflow outside 450 cfm/ton.
NOTES:
1. Airflow based upon dry coil at 230v with factory−approved filter and electric heater (2 element heater sizes 18 through 36, 3 element heater sizes 42
through 60). Airflow at 208 volts is approximately the same as 230 volts because the ECM motor is a constant torque motor. The torque doesn’t drop
off at the speeds the motor operates.
2. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must be less than 0.40 in. wc.
Horizontal applications of 42 − 60 sizes must have supply static greater than 0.20 in. wc.
3. Airflow above 400 cfm/ton on 48 & 60 size could result in condensate blowing off coil or splashing out of drain pan.

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

WAXL AIRFLOW PERFORMANCE TABLES

AIRFLOW PERFORMANCE − CFM at a given Speed and Static reading
Measured Static Pressure, inlet to outlet (inches water column)
Model Blower Speed
0.10 0.20 0.30 0.40 0.50 0.60
Tap 5 776 745 696 660 609 572
Tap 4 683 644 589 548 494 461
WAXL184A Tap 3 683 644 589 548 494 461
Tap 2 631 563 500 443 409 361
Tap 1 625 524 457 417 367 319
Tap 5 956 920 891 851 816 780
Tap 4 825 795 757 722 674 634
WAXL244A Tap 3 825 795 757 722 674 634
Tap 2 726 695 635 598 543 509
Tap 1 631 563 500 443 409 361
Tap 5 1189 1151 1104 1050 1003 959
Tap 4 1041 998 944 886 837 772
WAXL304A Tap 3 1041 998 944 886 837 772
Tap 2 924 876 817 752 704 660
Tap 1 779 693 628 571 526 476
Tap 5 1363 1332 1294 1253 1207 1157
Tap 4 1237 1206 1160 1121 1070 1013
WAXL364A Tap 3 1237 1206 1160 1121 1070 1013
Tap 2 1095 1058 1007 951 888 824
Tap 1 1014 885 773 673 609 549
Tap 5 1519 1490 1454 1419 1379 1332
Tap 4 1437 1403 1366 1333 1294 1245
WAXL424A Tap 3 1437 1403 1366 1333 1294 1245
Tap 2 1257 1226 1191 1141 1090 1033
Tap 1 1237 1206 1160 1121 1070 1013
Tap 5 1757 1725 1693 1653 1614 1576
Tap 4 1664 1626 1593 1552 1517 1477
WAXL484A Tap 3 1664 1626 1593 1552 1517 1477
Tap 2 1459 1420 1379 1336 1298 1259
Tap 1 1301 1241 1195 1150 1102 1039
Tap 5 2030 1995 1961 1927 1888 1842
Tap 4 1811 1775 1740 1703 1664 1613
WAXL604A Tap 3 1811 1775 1740 1703 1664 1613
Tap 2 1665 1632 1593 1556 1507 1453
Tap 1 1462 1418 1371 1327 1278 1228
NOTES:
1. Airflow based upon dry coil at 230v with factory approved filter and electric heater (2 element heater sizes 18 through 36, 3 element heater sizes 42 through 60).
2. Airflow at 208 volts is approximately the same as 230 volts because the ECM motor is a constant torque motor. The torque doesn’t drop off at the speeds the
motor operates.
3. To avoid potential for condensate blowing out of drain pan prior to making drain trap: Return static pressure must be less than 0.40 in. wc. Horizontal
applications of 42 − 60 sizes must have supply static greater than 0.20 in. wc.
4. Airflow above 400 cfm/ton on 48 − 60 size could result in condensate blowing off coil or splashing out of drain pan.
5. Not recommended for use above 0.60 inches water column external static pressure.
6. Shading − Airflow outside 450 cfm/ton.

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL
Table 1 − Air Delivery Performance Correction Component Pressure Drop (in. wc) at Indicated Airflow (Dry to Wet Coil)
CFM
UNIT SIZE 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
18 0.034 0.049 0.063 — — — — — — — — — — — — —
WAPL 24 — 0.049 0.063 0.076 0.089 — — — — — — — — — — —
WAHL 24 — 0.026 0.038 0.049 0.059 — — — — — — — — — — —
WAXL 24 0.016 0.027 0.038 0.049 0.059 — — — — — — — — — — —
30 — — — 0.049 0.059 0.070 0.080 — — — — — — — — —
36 — — — — — 0.070 0.080 0.090 0.099 — — — — — — —
WAXL 36 − − − − − .055 .064 .073 .081 − − − − − − −
42 — — — — — — — 0.049 0.056 0.063 0.070 — — — — —
48 — — — — — — — — — 0.063 0.070 0.076 0.083 0.090 — —
WAXL 48 — — — — — — — — — 0.038 0.043 0.049 0.054 0.059 — —
60 — — — — — — — — — — — 0.049 0.054 0.059 0.065 0.070
WAXL 60 — — — — — — — — — — — 0.027 0.031 0.035 0.039 0.043

STATIC PRESSURE DROP ACROSS FILTER (inches of water column)

CFM
WAXL
400 600 800 1000 1200 1400 1600 1800 2000
184A .020 .044 .075 − − − − − −
244A − .022 .048 .072 .100 − − − −
304A − .022 .048 .072 .100 − − − −
364A − − − .051 .070 .092 .120 .152 −
424A − − − .051 .070 .092 .120 .152 −
484A − − − .051 .070 .092 .120 .152 −
604A − − − − − − .086 .105 .130

Table 2 − Electric Heater Static Pressure Drop (in. wc)

WAHL, WAPL 18 - 36 WAHL, WAPL 42 - 60
HEATER EXTERNAL STATIC PRESSURE HEATER EXTERNAL STATIC PRESSURE
ELEMENTS kW CORRECTION ELEMENTS kW CORRECTION
0 0 +.02 0 0 +.04
1 3, 5 +.01 2 8, 10 +.02
2 8, 10 0 3 9, 15 0
3 9, 15 –.02 4 20 –.02
4 20 –.04 6 18, 24, 30 –.10

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 INSTALLATION INSTRUCTIONS Fan Coils: WAHL, WAPL, WAXL

R−410A QUICK REFERENCE GUIDE

• R−410A refrigerant operates at 50% − 70% higher pressures than R−22. Be sure that servicing equipment and
replacement components are designed to operate with R−410A.

• R−410A refrigerant cylinders are rose colored.

• Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.

• R−410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.

• Manifold sets should be 750 psig high−side and 200 psig low−side with 520 psig low−side retard.

• Use hoses with 750 psig service pressure rating.

• Leak detectors should be designed to detect HFC refrigerant.

• R−410A, as with other HFC refrigerants, is only compatible with POE oils.

• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

• POE oils may cause damage to certain plastics and roofing materials.

• Vacuum pumps will not remove moisture from oil.

• A liquid line filter−drier is required on every unit.

• Do not use liquid line filter−driers with rated working pressures less than 600 psig.

• Do not install a suction line filter−drier in liquid line.

• Wrap all filter−driers and service valves with wet cloth when brazing.

• Do not use capillary tube indoor coils.

• Never open system to atmosphere while it is under a vacuum.

• When system must be opened for service, break vacuum with dry nitrogen and replace all filter−driers.

• Do not vent R−410A into the atmosphere.

• Observe all WARNINGS, CAUTIONS, NOTES, and bold text.

• Do NOT use R−22 TXV.

TRAINING
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Copyright 2019 International Comfort Products

Lewisburg, TN 37091 USA
496 01 7202 04 Specifications are subject to change without notice. 17