DIVISION 23- SECTION 23 21 23

HYDRONIC PUMPS

1 General
1.1 Section Includes
a. Materials, equipment selection, installation and start up for hydronic system pumps

1.2 Reference Standards

a. ASHRAE Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings.
b. National Electrical Manufacturer’s Association (NEMA)
– NEMA MG 1, Motors and Generators.
c. American National Standards Institute/Hydraulics Institute (ANSI/HI)
– ANSI/HI 1.3, Rotodynamic (Centrifugal) Pumps for Design and Application.

1.3 Shop Drawings

a. All shop drawings must be scaled 1:50
b. Submit manufacturer's detailed composite wiring diagrams for control systems showing factory in-
stalled wiring and equipment on packaged equipment or required for controlling devices or ancillar-
ies, accessories and controllers.
c. Submit product data of pump curves for review showing point of operation.
d. Indicate piping, valves and fittings shipped loose by packaged equipment supplier, showing their fi-
nal location in field assembly.

1.4 Health and Safety

a. Do construction occupational health and safety

1.1 Waste Management and Disposal

a. Remove from site and dispose of packaging materials at appropriate recycling facilities.
b. Collect and separate for disposal, paper, plastic, polystyrene, corrugated cardboard packaging ma-
terial in appropriate on-site bins for recycling in accordance with Waste Management Plan.
c. Separate for reuse and recycling and place in designated containers, steel, metal, plastic waste in
accordance with Waste Management Plan.
d. Fold up metal banding, flatten and place in designated area for recycling.

1.2 Extra Materials

a. Furnish following spare parts:
– Mechanical seal for each pump.
– Packing for each pump.

2 Product
2.1 Manufacturers
a. Approved Manufacturer: Subject to compliance with requirements, provide products by one of the
following
– Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
 – Pumps (Contact Ms Camille Kate Enriquez – 09175094990)
– Or approved equivalent

2.2 In-line Circulators

a. Volute: cast iron radially split, with screwed or flanged design suction and discharge connections.
b. Impeller: alloy steel, cast bronze, or cast iron to suit application.
c. Shaft: stainless steel with bronze sleeve bearing, integral thrust collar.
d. Seal assembly: mechanical for service to 1350C.
e. Coupling: flexible self-aligning.
f. Motor: as per Section 23 05 13 – Common Motor Requirements for HVAC Equipment and as per
manufacturer’s recommendations. Speed and power as indicated in the pump schedule.
g. Capacity: as indicated in the pump schedule.
h. Design pressure: 2500 kPa.

2.3 In-line Wet Rotor Circulators

a. Pump body: Cast iron
b. Impellor: polypropylene (glass filled)
c. Shaft: stainless steel
d. Bearings: Graphite
e. Gasket material: EPDM.
f. Maximum fluid temperature: 110oC.
g. Maximum working pressure: 1600 kPa.
h. Capacity: as indicated in pump schedule.
i. Connections: union or flanged.

2.4 Vertical In-line Circulators

a. Volute: cast iron radially split, with tapped openings for venting, draining and gauge connections,
with screwed or flanged suction and discharge connections.
b. Impeller: bronze or cast iron, dynamically balanced.
c. Shaft: stainless steel with bronze sleeve bearing, integral thrust collar.
d. Seal assembly: outside balanced, mechanical for service to 135 0C. Flush line fittings to include 50-
micron filter and sight flow indicator, if pump differential exceeds 200 kPa replace filter with cyclone
type separator.
e. Coupling: flexible self-aligning.
f. Motor: NEMA base, drip proof, ball bearing as per Section 23 05 13 – Common Motor Require-
ments for HVAC Equipment, speed and power as indicated in pump schedule.
g. Capacity: as indicated in pump schedule.
h. Design pressure: 1200 kPa.

2.5 Single Suction Centrifugal Pump (For ≤ 500 GPM flow rate)
a. General: all iron pump complete with motor.
b. Base: common cast iron or fabricated steel with drip guide and tapping for drain connection.
c. Volute: cast iron radially split, back pullout end suction, screwed or flanged suction and discharge,
with drain plug and vent cock, suction and discharge pressure gauge tapping.
d. Impeller: bronze or stainless-steel enclosed type, keyed drive with locking nut or screw, dynamic-
ally balanced.
 e. Shaft: stainless steel with two-point support for ball bearing mounting hardened wear rings at pack-
ing gland.
f. Seal assembly: mechanical seal, grease lubricated structure and sealed (non re-lubrication re-
quired/grease for life span). On open system, flush line with 50-micron filter and site flow indicator.
When differential exceeds 200 kPa use cyclone type separator.
g. Coupling: flexible self-aligning complete with coupling guard.
h. Motor: NEMA Class B and IE 3 (minimum), squirrel cage induction, premium efficiency continuous
duty, drip proof, ball bearing, and maximum temperature rises 50 0C, as per Section 23 05 13 -
Common Motor Requirements for HVAC Equipment, speed and power as indicated in pump sched-
ule.
i. Capacity: as indicated in pump schedule.
j. Design pressure: 1600 kPa.

2.6 Double Suction Centrifugal Pump (For ≥ 500 GPM flow rate)
k. General: all iron pump complete with motor.
l. Base: common cast iron or fabricated steel with drip guide integrated with the base frame and tap-
ping for drain connection.
m. Volute: bronze radially split case, top pull-out type, screwed or flanged suction and discharge, with
drain plug and vent cock, suction and discharge pressure gauge tapping.
n. Impeller: bronze or stainless-steel enclosed type, keyed drive with locking nut or screw, dynamic-
ally balanced.
o. Shaft: stainless steel with two-point support for ball bearing mounting hardened wear rings at pack-
ing gland.
p. Seal assembly: mechanical seal, grease lubricated structure and sealed (non re-lubrication re-
quired/grease for life span). On open system, flush line with 50-micron filter and site flow indicator.
When differential exceeds 200 kPa use cyclone type separator.
q. Coupling: flexible self-aligning complete with coupling guard.
r. Motor: NEMA Class B and IE 3 (minimum), premium efficiency continuous duty, squirrel cage in-
duction, drip proof, ball bearing, and maximum temperature rises 50 0C, as per Section 23 05 13 -
Common Motor Requirements for HVAC Equipment, speed and power as indicated in pump sched-
ule.
s. Capacity: as indicated in pump schedule.
t. Design pressure: 1600 kPa.

2.7 Horizontal Split Case Centrifugal Pump (For ≥ 500 GPM flow rate)
a. General: cast iron pump complete with motor.
b. Base: common cast iron or fabricated steel base with drip guide integrated with the base frame and
tapping for drain connection.
c. Volute: cast iron horizontally split, with suction and discharge nozzles integrally cast in lower half,
flanged suction and discharge, with drain plug and vent cock, suction and discharge pressure tap-
ping.
d. Impeller: bronze enclosed type, keyed drive.
e. Shaft: alloy steel stainless steel with two-point support for ball bearing mounting hardened wear
rings at packing gland.
 f. Seal assembly: mechanical seal, grease lubricated structure and sealed (non re-lubrication re-
quired/grease for life span). On open system flush line with 50-micron filter and site flow indicator,
when differential exceeds 200 kPa cyclone type separator.
g. Coupling: flexible self-aligning complete with coupling guard.
h. Motor: NEMA Class B and IE 3 (minimum), squirrel cage induction, speed and power as indicated
in pump schedule, continuous duty, drip proof, ball bearing, maximum temperature rise 50 0C,
premium efficiency, as per Section 23 05 13 - Common Motor Requirements for HVAC Equipment.
i. Capacity: as indicated in pump schedule.
j. Design pressure: 1200 kPa.

3 Execution
3.1 Installation
a. In line circulators: install as indicated by flow arrows. Support at inlet and outlet flanges or unions.
Install with bearing lubrication points accessible.
b. Base mounted type: supply templates for anchor bolt placement. Furnish anchor bolts with sleeves.
Place level, shim unit and grout. Align coupling in accordance with manufacturer's recommended
tolerance. Check oil level or greased and lubricate.
c. Ensure that pump body does not support piping or equipment. Provide stanchions or hangers for
this purpose. Refer to manufacturer's installation instructions for details.
d. Pipe drain tapping to floor drain.
e. Install volute venting pet cock in accessible location.
f. Check rotation prior to start-up.
g. Install pressure gauge ball valves.

3.2 Start-up
a. General
– In accordance with manufacturer's recommendations.
b. Procedures:
– Before starting pump, check that cooling water system, over-temperature and other protective
devices are installed and operative.
– After starting pump, check for proper, safe operation.
– Check installation, operation of mechanical seals, packing gland type seals. Adjust as neces-
sary.
– Check base for free-floating, no obstructions under base.
– Run-in pumps for 12 continuous hours.
– Verify operation of over-temperature and other protective devices under low- and no-flow condi-
tion.
– Eliminate air from scroll casing.
– Adjust water flow rate through water-cooled bearings.
– Adjust alignment of piping and conduit to ensure true flexibility at all times.
– Eliminate cavitation, flashing and air entrainment.
– Adjust pump shaft seals.
– Measure pressure drop across strainer when clean and with flow rates as finally set.
– Replace seals if pump used to degrease system or if pump used for temporary heat.
– Verify lubricating oil levels.
3.3 Performance Verification (PV) and Commissioning
a. General
– In accordance with Commissioning (Cx) Requirements.
– In accordance with manufacturer's recommendations.
b. Assumptions: These PV procedures assume that:
– Manufacturer's performance curves are accurate.
– Valves on pump suction and discharge provide tight shut-off.
c. Net Positive Suction Head (NPSH):
– Application: Measure NPSH for pumps, which operate on open systems and with water at elev-
ated temperatures.
– Measure using procedures prescribed in the ANSI/HI 1.6.
– Where procedures do not exist, discontinue PV, report to Owner and await instructions.
d. Multiple Pump Installations - Series and Parallel:
– Repeat PV procedures specified above for pump performance and pump BHP for combinations
of pump operations.
e. Mark points of design and actual performance at design conditions as finally set upon completion of
TAB.
f. Commissioning Reports: In accordance with Section 01 91 13.13 –Commissioning (Cx) Require-
ments Reports supplemented as specified herein. Reports to include:
– Record of point(s) of actual performance at maximum and minimum conditions and for single
and parallel operation as finally set at completion of commissioning on pump curves.
– Report forms as specified in Commissioning (Cx) Requirements.
– Pump performance curves (family of curves).

END OF SECTION
For Plumbing

DIVISION 22 – SECTION 22 11 23
DOMESTIC WATER PUMPS

1 General
1.1 Summary

● Section Includes:
– Horizontal-end suction Pump, Constant Pressure System, VFD Type

2 Products
● All equipment shall be supplied from reputable firms engaged in the manufacture of each particular
item minimum 10 years engaged in the Philippines. The entire assembly as installed shall be given
a start-up and test run to prove that all the specifications have been met before acceptance by the
Owner. The test duration shall be 24 hours. Submittal of the Certificate of Test to the Owners shall
be a condition of final payment.
● The Specifications herein stated are basic guide only. Other items not so indicated but which are
obviously necessary for the proper operation of system as intended shall be supplied in accordance
with accepted engineering standards.
● The equipment shall be guaranteed for a period of at least minimum two five (5) year of trouble-free
operation. The supplier of equipment shall certify to the availability of spare parts locally and ser-
vice in case of system breakdowns within a period of at least five (5) years. Manuals of operation
and maintenance and lists of spare parts shall be supplied together with the equipment. Submittal
of Warranty Certificate shall be on condition to the final payment.
● The supplier shall submit at least two (2) copies of pumps performances curves showing among
others, the pump rating and pump efficiency, properly marked thereon.
● Accessories to be supplied for each group shall include one non - slam type check valve, and two
(2) gate valves, of size equal to the size of pump discharge and suction and rated 150 psi. Also,
one pressure gauge for each set of pumps and pipe fittings necessary for complete installation
shall be provided. The pressure gauge shall be 100 mm face diameter and shall be reading from 0
psi (or 0 kg/cm) to 100 psi (or 7 kg/cm).
● Price quoted shall include cost delivery of all quoted items to the jobsite. Pump and motor installa-
tion dimension drawings shall be submitted together with the quotation.
● Pre-factory assembled, pre-wired, and pre - testing must be conducted prior to shipment witnessed
by the Consulting Engineer.
● The brands, names and place of manufacture of pump, motor, valves, controls and all accessories
where applicable shall be indicated in the quotation. Also, a description of pump impellers being
offered shall be included.
● A metal nameplate indicating in indelible letters the correct specifications of the pump and motor
shall be properly attached to the assembly at a location such that the information written thereon
can be conveniently read by all concerned.
● A separate price shall be quoted for installation work and preparation submittal of as installed draw-
ings.
2.1 Potable Booster Pumps
● Description:
– Number of Units: 1 set triplex type equipped with bladder tank, manifold and pressure gauge.
– Capacity of Pump: Verify plans.
● Triplex unit, with pumps, piping, valves, sensors, controls, bladder tank, use stainless steel 304
manifold and built-in adjustable-speed-drive units for variable-speed logic controller operation (PLC
type plug and play).
– Pressure Rating: Minimum 1600 kPa, and as required to suit system pressure.
– Pump Arrangement: Triplex, with three equal-size pumps.
– Pump set shall be built in multiple variable speed drive with logic control pumps for every pump
one being a standby, pressure membrane bladder tank, interconnecting pipe work (use stain-
less steel 304 manifold), valves, pressure switches and electric control panel, piped, wired and
tested at factory and delivered as complete set ready for installation and operation with simple
piping and electrical connections.
● Pump set to be automatically controlled by pressure switches starting pumps on fall of pressure in
bladder tank and stopping pumps on rise of pressure. Pumps to be sized so that all duty pumps
running together would supply maximum demand specified. Under normal conditions duty pumps
are to supply sufficient water with standby pumps acting as standby. Logic Controls (PLC) are to
automatically start a second pump when duty pump is unable to supply demand.
● Pumps
– Pumps shall be vertical multistage short-coupled industrial turbine pumps.
 Impellers: stainless steel, mixed flow enclosed type.
 Balancing of Impellers: Each impeller shall be statically and dynamically balanced prior to as-
sembly in pump casing.
 Pump shaft: Stainless steel type 416.
 Lubrication: Water lubricated type pump.
 Pump Bowls: Stainless case flanged and bolted.
 Pump Bearings: SAE 660 bronze, radial type.
 Pump Head: Fabricated stainless steel with continuous bypass for low seal pressure. Cast
iron heads are not acceptable. Pump head shall be lined same as pump barrel.
 Seal: Mechanical general purpose type, with sleeve mounting. Seal shall be rated at 1200
kPa (175 psi) maximum.
 Adjustable Spacer Coupling: Removable type required so that pump seal can be replaced
without disturbing motor.
 Motor: Electric motors shall be enclosed, fan cooled, squirrel cage, induction type with per-
manently lubricated and sealed ball bearings. Solid shaft motors balanced to .22 mm
(0.0085-inch) vibration amplitude shall be operated at any point on the pump head curve
without overloading the motor. Conform to NEMA 250-Type 2, minimum IE 3.
 Pump Barrel: Schedule 40 steel pipe with two-coat "baked" internal lining. Provide drain tap-
ping.
 Variable-Speed-Drive Controllers: Fitted with PLC Logic Control (plug and play) Adjustable-
speed-drive unit for each pump.

2.2 Pressure (Bladder) Tank for Potable Booster Pump

● Descriptions
– Number of Units: 1 No
– Capacity of Tank: As per plan / verify manufacturer’s recommendation.
– Approximate Dimensions: As per plan / verify manufacturer’s recommendation.
– Operating Pressure: Cut-in, 30 psi and cut-off at 60 psi (minimum).
– Tank Materials: Stainless steel 3/16” minimum thickness or powder coated galvanized steel,
100 psi pressure rating per ASME Code for Unfired Pressure Vessels.
 – Supports: Reinforced concrete, properly drained and cushioned.
– Accessories:
a. Pressure gauge for operating pressure of 0 to 100 psi, detail face diameter - 100 mm.
b. Water level gauge, consisting of a sight glass in copper tubing with sufficient opening and
graduations to indicate the level of water inside pressure tank correct to one (1) mm.
c. Pressure Relief Valve: To release pressure at 45 psi.
– Water Drain Valves.
– Pressure switches, controlled by logic control.
● Approved Manufacturer - Subject to compliance with requirements, provide products by one of the
following
– Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
– Grundfos (Contact Engr Emerson Galamgam - 0917 893 1114)
– KSB (Contact Engr Job Bernardos - 0917 966 6579)

2.3 Non-Potable Booster / Irrigation Pumps

● Description:
– Number of Units: 1 set duplex type
– Capacity of Pump: Verify plans.
● Duplex unit, with pumps, piping, valves, sensors, controls, and adjustable-speed-drive units for
variable-speed operation.
– Pressure Rating: Minimum 1200 kPa, and as required to suit system pressure.
– Pump Arrangement: Duplex, with two equal-size pumps.
– Pump set shall be multiple variable speed pumps one being a standby, pressure membrane
tank, interconnecting pipe work, valves, pressure switches and electric control panel, piped,
wired and tested at factory and delivered as complete set ready for installation and operation
with simple piping and electrical connections.
– Pump set to be automatically controlled by pressure switches starting pumps on fall of pressure
in tank and stopping pumps on rise of pressure. Pumps to be sized so that all duty pumps run-
ning together would supply maximum demand specified. Under normal conditions duty pumps
are to supply sufficient water with standby pumps acting as standby. Controls are to automatic-
ally start a second pump when duty pump is unable to supply demand.
– Approved Manufacturer - Subject to compliance with requirements, provide products by one of
the following
 Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
 Grundfos (Contact Engr Emerson Galamgam - 0917 893 1114)
 KSB (Contact Engr Job Bernardos - 0917 966 6579)

2.4 Pumps
– Pumps shall be vertical multistage short-coupled industrial turbine pumps.
– Impellers: SAE 40 cast bronze, mixed flow enclosed type.
– Balancing of Impellers: Each impeller shall be statically and dynamically balanced prior to as-
sembly in pump casing.
– Pump shaft: Stainless steel type 416.
– Lubrication: Water lubricated type pump.
– Pump Bowls: Cast Iron flanged and bolted.
– Pump Bearings: SAE 660 bronze, radial type.
– Pump Head: Fabricated steel with continuous bypass for low seal pressure. Cast iron heads are
not acceptable. Pump head shall be lined same as pump barrel.
– Seal: Mechanical general purpose type, with sleeve mounting. Seal shall be rated at 1200 kPa
(175 psi) maximum.
 – Adjustable Spacer Coupling: Removable type required so that pump seal can be replaced
without disturbing motor.
– Motor: Electric motors shall be enclosed, fan cooled, squirrel cage, induction type with perman-
ently lubricated and sealed ball bearings. Solid shaft motors balanced to .22 mm (0.0085-inch)
vibration amplitude shall be operated at any point on the pump head curve without overloading
the motor. Conform to NEMA 250-Type 2.
– Pump Barrel: Schedule 40 steel pipe with two-coat "baked" internal lining. Provide drain tapping.
– Variable-Speed-Drive Controllers: Adjustable-speed-drive unit for each pump.
– Approved Manufacturer - Subject to compliance with requirements, provide products by one of
the following
 Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
 Grundfos (Contact Engr Emerson Galamgam - 0917 893 1114)
 KSB (Contact Engr Job Bernardos - 0917 966 6579)

2.5 Pressure Tank for Non-Potable Booster Pump

● Descriptions
– Number of Units: 1 No
– Capacity of Tank: As per plan / verify manufacturer’s.
– Approximate Dimensions: As per plan / verify manufacturer’s.
– Operating Pressure: Cut-in, 30 psi and cut-off at 50 psi.
– Tank Materials: Stainless steel 3/16” minimum thickness, 100 psi pressure rating per ASME
Code for Unfired Pressure Vessels.
– Supports: Reinforced concrete, properly drained and cushioned.
– Accessories:
 Pressure gauge for operating pressure of 0 to 100 psi, detail face diameter - 100 mm.
 Water level gauge, consisting of a sight glass in copper tubing with sufficient opening and
graduations to indicate the level of water inside pressure tank correct to one (1) mm.
 Pressure Relief Valve: To release pressure at 45 psi.
– Water Drain Valves.
– Pressure switches, to be set cut-in - 40 psi; and cutout - 60 psi.
– Approved Manufacturer - Subject to compliance with requirements, provide products by one of
the following
 Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
 Grundfos (Contact Engr Emerson Galamgam - 0917 893 1114)
 KSB (Contact Engr Job Bernardos - 0917 966 6579)

2.6 Materials

2.6.1 Compliance:
● Comply with manufacturer’s written recommendations or specifications, including product technical
bulletins, handling, storage and installation instructions, and datasheet.
● Submit company history and project completion.
● The manufacturer shall provide all sizes, weights, mounting dimensions, and wiring details with his
offer.
● Obtain written report from manufacturer verifying compliance of work, in handling, installing, apply-
ing, protecting and cleaning of product and submit Manufacturer’s Field Reports as described in
PART 1 – SUBMITTALS
● Provide manufacturer’s field services consisting of product use recommendations and periodic site
visits for inspection of product installation in accordance with manufacturer’s instructions. Schedule
site visits, to review work, as directed in PART 1 – QUALITY ASSURANCE
● Wipe equipment clean, and remove traces of oil, dust, dirt, or paint spots.
 ● Maintain system in clean condition until final acceptance.
● Upon completion and verification of performance of installation, remove surplus materials, excess
materials, rubbish, tools and equipment.
● Subject to compliance with requirements, provide products by one of the following.

1.1.1 Approved Manufacturers:

Subject to compliance with requirements, provide products by one of the following:
● Pumps:
– Approved Manufacturer - Subject to compliance with requirements, provide products by one of
the following
– Wilo Pumps (Contact Engr Cesar Torrigoza - 0908 475 5212)
– Grundfos (Contact Engr Emerson Galamgam - 0917 893 1114)
– KSB (Contact Engr Job Bernardos - 0917 966 6579)

3 Execution

3.0 Installation

h. In line circulators: install as indicated by flow arrows. Support at inlet and outlet flanges or unions.
Install with bearing lubrication points accessible.
i. Base mounted type: supply templates for anchor bolt placement. Furnish anchor bolts with sleeves.
Place level, shim unit and grout. Align coupling in accordance with manufacturer's recommended
tolerance. Check oil level and lubricate.
j. Ensure that pump body does not support piping or equipment. Provide stanchions or hangers for
this purpose. Refer to manufacturer's installation instructions for details.
k. Pipe drain tapping to floor drain.
l. Install volute venting pet cock in accessible location.
m. Check rotation prior to start-up.
n. Install pressure gauge ball valves.

END OF SECTION

DIVISION 22 – SECTION 22 30 00
DOMESTIC WATER HEATERS – Heat Pump

1 General

1.10 Description

a. This Section specifies electrically operated air-source unitary heat pumps.

b. A complete listing of common acronyms and abbreviations are included in Section 23 05 11,
COMMON WORK RESULTS FOR HVAC.
1.11 Definitions:

a. Coefficient of Performance (COP) - Heating: Minimum of 3.8 up to 4.5 COP is required. The ratio of
the rate of heat delivered to the rate of energy input is consistent units for a complete heat pump
system, including the compressor and, if applicable, auxiliary heat under designated operating
conditions.
b. Energy Efficiency Ratio (EER): The ratio of net cooling capacity is Btu/h to total rate of electricity
input in watts under designated operating conditions.
c. Heating Seasonal Performance Factor (HSPF) - Total heating output of heat pump during its
normal annual usage period for heating in Btu/h divided by total electric energy input in watts during
the same period.
d. Seasonal Energy Efficiency Ratio (SEER) - Total cooling output of an air conditioner during its
normal annual usage period for cooling in Btu/h divided by total electric energy input in watts during
the same period.
e. Air-Source Unitary Heat Pump: One or more factory made assemblies that normally include an
indoor conditioning coil, compressor(s) and an outdoor refrigerant-to-air coil. These units provide
both heating and cooling functions.

1.12 RELATED WORK

a. Section 01 00 00, GENERAL REQUIREMENTS.

b. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.
c. Section 01 91 00 – GENERAL COMMISSIONING REQUIREMENTS.
d. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON─STRUCTURAL
COMPONENTS.
e. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.
f. Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC.
g. Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS.
h. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.
i. Section 23 23 00, REFRIGERANT PIPING.
j. Section 23 31 00, HVAC DUCTS AND CASINGS.

1.13 QUALITY ASSURANCE

a. Refer to specification Section 23 05 11, COMMON WORK RESULTS FOR HVAC

b. Comply with ASHRAE Standard 15, Safety Code for Mechanical Refrigeration.
c. Comply with ASHRAE Standard 90.1, Energy Standard for Buildings except Low-Rise Residential
Buildings for cooling and heating performance requirements when tested in accordance with AHRI
240 AHRI 360 and UL 1995.
d. Heating Performance shall conform to ASHRAE requirements when tested in accordance with
AHRI 240, AHRI 360 and UL 1995.
e. Comply with requirements in Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR
NON-STRUCTURAL COMPONENTS.

1.14 SUBMITTALS

a. Submit in accordance with specification Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA,
and SAMPLES.
 b. Manufacturer’s Literature and Data Including:
– Air-Source Unitary Heat pump:
– Packaged units
– Split system

1.15 Certification:

a. Submit, simultaneously with shop drawings, a proof of certification that this product has been
certified by AHRI.

1.16 Performance Rating:

a. Submit catalogue selection data showing equipment ratings and compliance with required cooling
and heating capacities EER and COP values as applicable.
b. Completed System Readiness Checklists provided by the CxA and completed by the contractor,
signed by a qualified technician and dated on the date of completion, in accordance with the
requirements of Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS.

1.17 APPLICABLE PUBLICATIONS

a. Air-Conditioning Heating and Refrigeration Institute (AHRI) Standards:

b. DCPP (Web-based) Directory of Certified Product Performance - Applied Directory of
Certified Products
c. 240-2020 Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment
d. Sound Rating of Outdoor Unitary Equipment
e. Standard for Packaged Terminal Air-Conditioners and Heat Pumps (CSA-C744-04)
f. Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment
g. Air Movement and Control Association (AMCA):
h. Laboratory Methods of Testing Fans for Aerodynamic Performance Rating (ANSI)
i. Recommended Safety Practices for Users and Installers of Industrial and Commercial Fans
j. American National Standards Institute (ANSI):
k. Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure -
Precision Method for Reverberation Rooms (same as ISO 3741:1999)
l. American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. (ASHRAE):
m. Safety Standard for Refrigeration Systems (ANSI)
n. Ventilation for Acceptable Indoor Air Quality (ANSI)
o. Energy Standard for Buildings except Low-Rise Residential Buildings
p. HVAC Systems and Equipment Handbook
q. American Society of Testing and Materials (ASTM):
r. Standard Practice for Operating Salt Spray (Fog) Apparatus
s. Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings
t. National Electrical Manufacturer’s Association (NEMA):
u. Industrial Controls and Systems: General Requirements
v. Motors and Generators (ANSI)
w. National Fire Protection Association (NFPA):
x. Standard for the Installation of Air-Conditioning and Ventilating Systems
y. Underwriters Laboratory (UL):
 z. Heating and Cooling Equipment

1.18 AS-BUILT DOCUMENTATION

a. Coordinate O&M Manual requirements with Section 01 00 00, GENERAL REQUIREMENTS. O&M
manuals shall be submitted for content review as part of the close-out documents.
b. Comply with requirements in Paragraph AS BUILT DOCUMENTATION of Section 23 05 11,
COMMON WORK RESULTS FOR HVAC.

2 PART 2 - PRODUCTS

2.10 UNITARY HEAT PUMPS, AIR TO WATER

a. Refer to Plumbing drawings for Hot water requirement for capacity, layout and systems
requirement.
b. Type I, factory assembled refrigerant circuit or circuits (Packaged Unit), Type II, (Split System)
having remote outdoor section separate from indoor Section;
– Class 1, "Department of Energy" (DOE) covered products (units with cooling capacity up to
19.05 kW or 65,000 Btu/hr;
– Class 2, Non–DOE covered products (units with heating capacity up to 88 kW or 300,000
Btu/hr.
c. Unitary heat pumps shall bear the United States Environmental Protection Agency, Energy Star
label and shall have a minimum Heating Season Performance Factor (HSPF) of:
– Type I – Packaged Unit);
– Type II – Split System); and
– A minimum Seasonal Energy Efficiency Ratio (SEER) of 14 for Type I – Packaged Unit), Type II
– Split System).
– Applicable AHRI Standards: Units shall be listed in the corresponding ARI Directory of Certified
products shown in paragraph, APPLICABLE PUBLICATIONS:
d. Air Source Unitary heat pumps with capacity less than 19 KW (65,000 Btu/hr), Comply with AHRI.
e. Air Source heat pump with capacity above 19KW (above 65,000 Btu/hr), Comply with AHRI.

2.11 Casing:

a. Unit shall be constructed of louvered zinc coated, heavy-gage 14-gage minimum, galvanized steel.
Exterior surfaces shall be cleaned, phosphatized, and finished with a weather-resistant powder
coated finish. Unit surfaces shall be tested 500 hours in a salt spray test in compliance with ASTM
B117. Cabinet panels shall have lifting handles and shall be water- and air-tight seal. All exposed
vertical, top covers and base pan shall be insulated with 50-mm (2-inch) matt-faced, fire-resistant,
odorless, glass fiber material. Surfaces in contact with the airstream shall comply with requirements
in ASHRAE 62.1. The base of the unit shall have provisions for forklift and crane lifting.
b. Filters: One inch, MERV 7, throwaway filter shall be standard on all units below 19kW (6 Tons).
Filter rack can be converted to two-inch capability. Two inch, MERV 8, throwaway filters shall be
factory supplied on all units above 19 kW (6 Tons).
2.12 Compressors:

a. Compressors shall be direct-drive, hermetic scroll type with centrifugal type oil pumps with built in
circulators. Motor shall be suction gas-cooled. Internal overloads and crankcase heaters shall be
utilized with all compressors.

2.13 Refrigerant Circuit:

a. A minimum of two circuits is required. Each refrigerant circuit shall have independent fixed orifice or
thermostatic expansion devices, service pressure ports, and refrigerant line filter driers factory
installed as standard. An area shall be provided for replacement suction line driers. Due to high-
humidity locations (VA HVAC Design Manual), provide E-coated aluminium fins and corrosion-
resistant cabinets. Use Refrigerant R417A factory charge.

2.14 Evaporator and Condenser Coils:

a. Hydrophilic Aluminium Fins Fin/Rifled Copper Tube Evaporator, Double wall Corrugated Copper
Tube in tube Heat Exchanger Internally finned, DN 10 (NPS 3/8) copper tubes mechanically
bonded to a configured aluminium plate fin shall be standard. The evaporated coil and condenser
coil shall be leak tested at the factory to 1378 kPa (200 psig) and pressure tested to 2756 kPa (400
psig). All dual compressor units shall have intermingled evaporator coils. Sloped condensate drain
pans shall be provided.

2.15 Outdoor fans:

a. Axial nylon blade evaporator fan Direct driven, statically and dynamically balanced, draw-through in
the vertical discharge position. The fan motors shall be permanently lubricated and shall have built-
in thermal overload protection.

2.16 Indoor Fan:

a. Forward-Curved, Centrifugal Fan: Provide V-belt driven with adjustable motor sheaves, adjustable
idler-arm assembly for quick-adjustment of fan belts and motor sheaves. Motors shall be thermally
protected. Provide oversized motors for high static application. Motors shall meet the U.S. Energy
Policy Act of 2005 (EPACT).

2.17 Plenum Fans

a. Provide direct-drive, Arrangement 4, plenum fan(s) equipped with variable-speed drives. Maximum
fans in an array shall not exceed four.

2.18 Defrost Controls:

b. A time initiated, temperature terminated 4-WAY defrosting valve system shall ship with a setting of
70-minute cycle, with a choice of 50- or 90-minute cycle. Timed override limits defrost cycle to 10
minutes shall be available on units from 35- to 70-kW (10 to 20 tons). Adaptive demand defrost
shall be provided on units below 35 kW (10 Tons).
2.19 Unit Electrical:

a. Provide single point unit power connection.

b. Unit control box shall be located within the unit and shall contain controls for compressor, reversing
valve and fan motor operation and shall have a 50 VA 24-volt control circuit transformer and a
terminal block for low voltage field wiring connections.
c. Power shall be 380VAC/ 3 Phase / 60Hz

2.20 Safety Controls:

a. High pressure, low temperature, and low-pressure safety switches shall be wired through a latching
lockout circuit to hold the conditioner off until it is reset electrically be interrupting the power supply
to the conditioner. All safety switches shall be normally closed, opening upon fault detection.
b. Provide High- & Low-Pressure Switch, Flow Switch safety device. Over current & Phasing
electrical safety device

2.21 Operating Controls

a. Provide unit with 380VAC/ 3 Phase / 60Hz with factory supplied DDC control system.
b. Low voltage, adjustable room thermostat to control heating and cooling in sequence with delay
between stages, compressor and supply fan to maintain temperature setting. Include system
selector switch heat-off-cool, off-heat-auto-cool and fan control switch (auto-on).

2.22 Hot Water Storage

a. Hot water storage shall be constructed Polypropylene Plastic inner & outer tank material with 100
mm polyurethane insulation with submerged stainless steel corrugated heat exchanger coil with
operating temperature of 90oCand fitted with back up electric heating element minimum of 6kW-12
kW depending on hot water demand. Coil operating pressure shall be up to 10Bars. Maximum
weight 85 kg.

2.23 Accessories:

2.23.1 Electric Heater:

a. Constructed of heavy-duty nickel chromium elements. Staging shall be achieved through the unit
control processor. Each heater shall have automatically reset high limit control. Heaters shall be
individually fused from the factory and shall comply with NEC and CEC requirements. Power
assemblies shall provide single point connection. Electric heat modules shall be listed and labelled
by a national recognized testing laboratory acceptable to authorities having jurisdiction. Electric
heater controls shall confirm the supply fan is operating before electric elements are energized.
Operate electric heater in 3 stages when outdoor ambient is too low to maintain space thermostat
setting with compressor operation.
2.23.2 Economizer:

a. Down flow, Horizontal flow; factory installed; and shall include fully modulating 0-100 percent motor
and dampers, barometric relief, minimum position setting and fixed dry bulb. Solid state enthalpy
and differential enthalpy control shall be field-installed.

2.23.3 Oversized Motors:

a. Factory installed over sized motor shall be available for high-static application.

2.23.4 Anti Vibration pads and mounts

a. Field installed anti vibration pads, springs and mounted on chassis/frame powder coated and anti-
rust.

2.23.5 Valves and Strainer

a. Factory installed Gate valve & Wye strainer mounted on suction side Gate & check valves and
discharge side.

2.24 CORROSION PROTECTION

a. Submit certificate of corrosion protection warranty for 3 years.

2.25 Remote Outdoor Condenser Coils:

2.25.1 Epoxy Immersion Coating – Electrically Deposited:

a. The multi-stage corrosion-resistant coating application comprises of cleaning (heated alkaline

immersion bath) and reverse-osmosis immersion rinse prior to the start of the coating process. The
coating thickness shall be maintained between 0.6-mil and 1.2-mil. Before the coils are subjected to
high-temperature oven cure, they are treated to permeate immersion rinse and spray. Where the
coils are subject to UV exposure, UV protection spray treatment comprising of UV-resistant
urethane mastic topcoat shall be applied. Provide complete coating process traceability for each
coil and minimum five years of limited warranty. The coating process shall be such that uniform
coating thickness is maintained at the fin edges. The quality control shall be maintained by
ensuring compliance to the applicable ASTM Standards for the following:
– Salt Spray Resistance (Minimum 6,000 Hours)
– Humidity Resistance (Minimum 1,000 Hours)
– Water Immersion (Minimum 260 Hours)
– Cross-Hatch Adhesion (Minimum 4B-5B Rating)
– Impact Resistance (Up to 160 Inch/Pound)

2.26 Exposed Outdoor Cabinet:

2.26.1 Casing Surfaces (Exterior and Interior):

a. All exposed and accessible metal surfaces shall be protected with a water-reducible powder
coating with stainless steel pigment spray-applied over the manufacturer’s standard finish. The
 spray coating thickness shall be 2-4 mils and provide minimum salt-spray resistance of 1,000 hours
(ASTM B117) AND 500 hours UV resistance ASTM D4587-11.

2.27 Manufacturer:

2.27.1 Compliance

a. Comply with manufacturer’s written recommendations or specifications, including product technical

bulletins, handling, storage and installation instructions, and datasheet.
b. The manufacturer shall provide all sizes, weights, mounting dimensions, and wiring details with his
offer.
c. Obtain written report from manufacturer verifying compliance of work, in handling, installing,
applying, protecting and cleaning of product and submit Manufacturer’s Field Reports as described
in PART 1 – SUBMITTALS
d. Provide manufacturer’s field services consisting of product use recommendations and periodic site
visits for inspection of product installation in accordance with manufacturer’s instructions. Schedule
site visits, to review work, as directed in PART 1 – QUALITY ASSURANCE
e. Wipe equipment clean, and remove traces of oil, dust, dirt, or paint spots.
f. Maintain system in clean condition until final acceptance.
g. Upon completion and verification of performance of installation, remove surplus materials, excess
materials, rubbish, tools and equipment.
h. Subject to compliance with requirements, provide products by one of the following.

2.27.2 Approved Manufacturer

a. Subject to compliance with requirements, provide products by one of the following:

– Air to Water Heat Pump
 Deron Air to Water Heat pump
– Pumps
 OEM, Wilo pumps.

3 PART 3 - EXECUTION

3.10 INSTALLATION

a. If in the substantiated evaluation of the COR, the installation fails to meet the requirements of the
construction documents with respect to function and maintainability, an installation is unsatisfactory
to the COR, the Contractor shall correct the installation at no additional cost or time to the
Government.
b. Install heat pumps according to manufacturers printed instructions.
c. Install electrical and control devices furnished by the manufacturer but not specified to be factory
mounted. All electrical work shall comply with Division 26 Sections.
d. Ductwork: Comply with requirements in Section 23 31 00, HVAC DUCTS AND CASINGS.
e. Piping: Comply with requirements in Section 23 23 00, REFRIGERANT PIPING.
3.11 STARTUP AND TESTING

a. Perform startup checks according to manufacturer’s written instructions.

b. The Commissioning Authority CxA and the Consulting Engineer of Record (CER) will observe start
up and contractor testing of selected equipment. Coordinate the start up and contractor testing
schedules with the CEOR and CxA. Provide a minimum notice of 7 working days prior to start up
and testing.
c. Test controls and demonstrate its compliance with project requirements. Replace damaged or
malfunctioning controls and equipment and retest the equipment to the satisfaction of the CEOR.
d. Furnish test reports to the COR in accordance with specification Section 01 00 00, GENERAL
REQUIREMENTS.

3.12 COMMISSIONING

a. Provide commissioning documentation in accordance with the requirements of Section 23 08 00,

COMMISSIONING OF HVAC SYSTEMS for all inspection, start up, and contractor testing required
above and required by the System Readiness Checklist provided by the CxA.
b. Components provided under this section of the specification will be tested as part of a larger
system. Refer to Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS and related sections
for contractor responsibilities for system commissioning.

3.13 DEMONSTRATION AND TRAINING

a. Provide services of manufacturer’s technical representative for at least 4 hours to instruct VA

personnel in operation and maintenance of units.
b. Submit training plans and instructor qualifications in accordance with the requirements of Section
23 08 00, COMMISSIONING OF HVAC SYSTEMS.

END OF SECTION