Nyle C270WM Series User manual

Instruction Manual
PLACE THESE INSTRUCTIONS ADJACENT TO HEAT PUMP AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
Nyle Geyser CWM Modular Water Source Heat Pump Water Heaters
MODEL C270WM Series
INSTALLATION - OPERATION - SERVICE
MAINTENANCE - LIMITED WARRANTY

2

3
Condensed Unit Report..............................................................................4
Wiring Diagrams.......................................................................5
Power Wiring Diagram................................................................................5
Output Wiring Diagram..............................................................................6
Input Wiring Diagram..................................................................................7
Safe Installation, Use & Service................................................8
General Safety Information.....................................................9
Precautions..............................................................................9
Dangers & Warnings....................................................................................9
Grounding Instructions..............................................................................9
Introduction..............................................................10
Qualifications..............................................................................10
Preparing ForThe Installation.................................................................10
Principle of Operation...............................................................................11
The Refrigeration Cycle............................................................................11
Source Water Temperature Range.......................................................11
Water Temperature Range.....................................................................11
Refrigerant Charge....................................................................................11
Equipment Disposal.................................................................................11
Features & Components........................................................12
Rough in Dimensions................................................................................13
Performance Specications....................................................................13
Installation Requirements.....................................................14
Maximum System Temperature............................................................14
Inlet & Outlet Water Temperature.........................................................14
Service & Installation Notes...................................................................14
Entering Source Water Temperature...................................................14
Locating the Water Heater.......................................................................14
Installation..............................................................................14
Freezing Temperatures.............................................................................14
Coastal Regions...........................................................................................14
Heat Source..................................................................................................14
Clearances..............................................................................15
Electrical Requirements........................................................15
Voltage & Amperage Ratings..................................................................15
Minimum Circuit Ampacity & Maximum Fuse Size.......................16
Minimum Wire Size...................................................................................16
Water Piping...........................................................................17
Minimum Pipe Size....................................................................................17
Water Pressure............................................................................................17
Closed Water Systems..............................................................................17
Thermal Expansion....................................................................................17
Mixing Valves...............................................................................................17
Contaminated Water................................................................................18
Temperature-Pressure Relief Valve......................................................18
Tank Selection.............................................................................................18
Solar Tanks....................................................................................................18
Storage & Handling................................................................19
Installation............................................................................20
Required Ability..........................................................................................20
General...............................................................................20
Required Tools & Materials.....................................................................20
Istallation & Start up Tools.......................................................................20
Unit Placement...........................................................................................20
Mounting Frame........................................................................................20
Pad Mounting.............................................................................................20
Electrical Connections...........................................................21
Correct Voltage & Phase.........................................................................21
Branch Circuit Disconnect Switch.......................................................21
Water Connections.................................................................21
Installation Instructions..........................................................................21
Single Tank Conguration......................................................................22
Multiple Tank Conguration..................................................................22
Standard Tank Thermostat.....................................................................22
Temperature Sensor Installation..........................................................23
Installation Checklist.............................................................24
Location.........................................................................24
Water Piping.................................................................................................24
Electrical..........................................................................24
Pre-Startup Checklist.............................................................25
3 Phase Startup Procedures..................................................26
Initial Start-up........................................................................27
Rotation Direction.....................................................................................27
Starting Sound............................................................................................27
Startup...............................................................28
Programmable Logic Controls..............................................29
PLC Controller..............................................................................................29
Temperatures & Setpoints.......................................................................29
Setpoint Ranges & Safeties.....................................................................29
Info Screen....................................................................................................30
Setup Screen................................................................................................30
Alarm Screen...............................................................................................31
Maintenance & Service..........................................................32
Cleaning Internal Insulation...................................................................32
Braze Plate Cleaning Instructions.........................................................32
Troubleshooting...............................................33
Checking Refrigerant Charge................................................................34
Superheat Calculation.............................................................................34
Water Piping Diagrams..........................................................35
Limited Warranty...................................................................39
Table of Contents

4
Unit Report
Basic Information
Compressor Data
Electrical Data
Transformer Size: Fuse/Breaker Size:
Refrigeration Equipment Data
Unit Physical Inspection: Pass / Fail
Date:
Company Name: Rep. Firm (If Applicable):
Unit Model #: Serial #:
Power Source: Controls:
Blower: Fans:
Suction Valve Size: Discharge: Liquid Line:
Condenser Data: Evaporator Data:
Refrigerant Type:
Model #: Serial #:
Connection Condition:
Crankcase Heater:
Capacitor MFD:
Low Pressure Switch Cut In: Cut Out:
Tested By: Inspected By:Date: Date:
Manufacturer: Size: Part #:Solenoid Valve Coil:
Compressor Time Delay:Compressor:
Size:Manufacturer:Thermal Expansion Valve Part #:
Voltage:

5
PB

6
PB

7
PB
AI0
AI1
I
I
I
I
I
I

8
6
SAFE INSTALLATION, USE AND SERVICE
The proper installation, use and servicing of this commercial heat pump water heater is extremely important to your safety and the
safety of others.
Many safety-related messages and instructions have been provided in this manual and on your own heat pump water heater to warn
you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very
important that the meaning of each safety message is understood by you and others who install, use, or service this heat pump water
heater.
DANGER
WARNING
CAUTION
CAUTION
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and
how to avoid the risk of injury.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances
known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of
potential exposure to such substances.
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. This
appliance can cause low level exposure to some of the substances listed in the Act.

9
7
GROUNDING INSTRUCTIONS
This heat pump water heater must be grounded in accordance
with the National Electrical Code and/or local codes. These must
be followed in all cases. Failure to ground this water heater
properly may also cause erratic control system operation.
This heat pump water heater must be connected to a grounded
metal, permanent wiring system; or an equipment grounding
conductor must be run with the circuit conductors and connected
to the equipment grounding terminal or lead on the water heater.
GENERAL SAFETY INFORMATION
PRECAUTIONS
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN
UNDER WATER. Immediately call a qualied service agency to
inspect the appliance and to make a determination on what steps
should be taken next.
If the unit is exposed to the following, do not operate heater
until all corrective steps have been made by a qualied service
agency.
1. External re.
2. Damage.
3. Running without water.
When servicing this unit, verify the power to the unit is turned off prior to opening the control cabinet door.
CONTAINS REFRIGERANT!
System contains oil and refrigerant under high pressure. Recover
refrigerant to relieve pressure before opening the system. See unit
rating label for refrigerant type. Do not use non-approved refrigerants,
refrigerant substitutes, or refrigerant additives.
Failure to follow proper procedures or the use of non-approved
refrigerants, refrigerant substitutes, or refrigerant additives could
result in death or serious injury or equipment damage.
Explosion Hazard
Do not use oxygen to purge or
pressurize system for leak test.
Oxygen reacts violently with oil,
which can cause an explosion
resulting in severe personal
injury or death.
Turn off power to the water heater
before performing any service.
Electrical Shock Hazard
•
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
•
Verify proper operation after servicing.
•
Failure to follow these instructions can
result in personal injury or death.
•
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting devices such as
mixing valves must be installed
when required by codes and to
ensure safe temperatures at fixtures.
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided
on connected storage tanks.

10
Thank You for purchasing this heat pump water heater. Properly
installed and maintained, it should give you years of trouble free
service.
Abbreviations found In this Instruction Manual include:
• HPWH - Heat Pump Water Heater
• ANSI - American National Standards Institute
• ASME - American Society of Mechanical Engineers
• NEC - National Electrical Code
• NFPA - National Fire Protection Association
• AHRI - Air-conditioning, Heating and Refrigeration Institute
QUALIFICATIONS
QUALIFIED INSTALLER OR SERVICE AGENCY:
Installation and service of this water heater requires ability
equivalent to that of a Qualied Agency (as dened by ANSI
below) in the eld involved. Installation skills such as plumbing,
electrical supply are required in addition to electrical testing skills
when performing service.
This heat pump water heater contains R-134a refrigerant and is
regulated as a stationary refrigeration appliance under Section
608 of the Clean Air Act. Servicing of the refrigeration circuit must
only be performed by agencies or individuals possessing Type II
or Universal certication as dened in Section 608 of the Clean
Air Act.
ANSI Z223.1 2006 Sec. 3.3.83: “Qualied Agency” - “Any
individual, rm, corporation or company that either in person or
through a representative is engaged in and is responsible for (a)
the installation, testing or replacement of gas piping or (b) the
connection, installation, testing, repair or servicing of appliances
and equipment; that is experienced in such work; that is familiar
with all precautions required; and that has complied with all the
requirements of the authority having jurisdiction.”
PREPARING FOR THE INSTALLATION
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
1. Read the “General Safety Information” section of this manual
rst and then the entire manual carefully. If you don’t follow
the safety rules, the heat pump water heater may not operate
safely. It could cause DEATH, SERIOUS BODILY INJURY
AND/OR PROPERTY DAMAGE.
This manual contains instructions for the installation,
operation, and maintenance of the heat pump water heater
(HPWH). It also contains warnings throughout the manual
that you must read and be aware of. All warnings and all
instructions are essential to the proper operation of the
HPWH and your safety. READ THE ENTIRE MANUAL
BEFORE ATTEMPTING TO INSTALL OR OPERATE
THIS WATER HEATING APPLIANCE.
INTRODUCTION
8
Detailed installation diagrams are in this manual. These
diagrams will serve to provide the installer with a reference
for the materials and suggested methods of piping. IT
IS NECESSARY THAT ALL WATER PIPING AND THE
ELECTRICAL WIRING BE INSTALLED AND CONNECTED
AS SHOWN IN THE DIAGRAMS.
Particular attention should be given to the installation of the
system (tank) temperature control. See page 19.
Turn off power to the water heater
before performing any service.
Electrical Shock Hazard
•
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
•
Verify proper operation after servicing.
•
Failure to follow these instructions can
result in personal injury or death.
•
Be sure to turn off power when working on or near the
electrical system of the heat pump. Never touch electrical
components with wet hands or when standing in water.
When replacing fuses always use the correct size for the
circuit.
The principal components of the HPWH are identified in the
Features And Components section of this manual on page
10. The rating label on the HPWH also provides useful
information. These references should be used to identify the
heat pump, its components and optional equipment.
2. The installation must conform with these instructions and the
local code authority having jurisdiction and the requirements
of the power company. In the absence of local codes, the
installation must comply with the latest editions of the
National Electrical Code, ANSI/NFPA 70 or the Canadian
Electrical Code CSA C22.1. The National Electrical Code
may be ordered from: National Fire Protection Association,
1 Batterymarch Park, Quincy, MA 02269. The Canadian
Electrical Code is available from the Canadian Standards
Association, 8501 East Pleasant Valley Road, Cleveland,
OH 44131.
3. If after reading this manual you have any questions or do not
understand any portion of the instructions DO NOT proceed
with the installation. Call the toll free number listed on the
back cover of this manual for technical assistance.
4. In order to expedite your request, please have full model and
serial number available for the technician.
5. Carefully consider your intended placement and location for
the HPWH. See Locating The Water Heater on page 24.
6. Installation and service of this HPWH requires ability
equivalent to that of a licensed tradesman or Qualified Agency
in the field involved. See Qualifications on page 8.
7. For installation in California the HPWH appliance must be
braced or anchored to avoid falling or moving during an
earthquake. Instructions may be obtained from California
Office of the State Architect, 1102 Q Street, Suite 5100,
Sacramento, CA 95811.

11
9
8. Ensure the power supply voltage and phase at the job site
matches the power requirements on the HPWH rating label
before installation begins. Energizing the HPWH with the
wrong voltage or phase will cause permanent damage to the
unit.
PRINCIPLE OF OPERATION
The appliances covered by this Instruction Manual are
commercial water-to-water heat pump water heaters (HPWH).
Operation of the HPWH is simple in the fact that we are
transferring heat energy from a water source to a DHW tank by
means of a compressed refrigeration cycle. Recovering and
using this waste heat increases the overall energy
efficiency of the building.
THE REFRIGERATION CYCLE
Refer to Figure 1 on page 10 for the location of
components mentioned in this section.
Refrigerant is circulated through the refrigeration circuit by a
Compressor. The refrigerant is a high temperature high
pressure gas when it leaves the compressor. Refrigerant
flows from the compressor through the Hot Gas Line to the
Condenser.
The condenser is a refrigerant-to-water heat exchanger with two
circuits, refrigerant flows through one circuit and water through
the other. The high temperature refrigerant gas transfers its heat
to the water flowing through the condenser. As the refrigerant
gas cools inside the condenser it changes state (condenses)
from a gas to a liquid. A customer provided Water Pump
circulates water through the condenser.
Refrigerant leaving the condenser is a medium temperature
high pressure liquid. It flows through the L iquid Line to the
Thermostatic Expansion Valve. The thermostatic expansion
valve (TXV) regulates the flow of refrigerant into the
Evaporator. The evaporator is a single wall brazed plate source
water-to-refrigerant heat exchanger. The refrigerant changes
state (boils/evaporates) from a liquid state back into a gas
(vapor) in the evaporator.
The refrigerant flows out of the evaporator through the Suction
Line (7) and into the Accumulator (8). The accumulator
traps any liquid refrigerant the evaporator is unable to vaporize
during low temperature operating conditions. The
accumulator prevents liquid refrigerant from entering the
compressor where it could damage internal components.
Low temperature low pressure refrigerant gas (vapor) is drawn
out of the accumulator by the compressor. The compressor
increases the pressure and temperature of the refrigerant gas
circulating it to the condenser again where the
refrigeration cycle starts over or continues.
SOURCE WATER TEMPERATURE RANGE
The entering source water temperature operating range for
the HPWH is 40°F to 100°F (4°C to 38°C).
When the HPWH is operating properly the source water
temperature drop through the evaporator (heat exchanger) will
be approximately 8°F to 10°F (-13°C to -12°C).
WATER TEMPERATURE RANGE
The inlet (entering) water temperature operating range for the
HPWH is 40°F to 140°F (4°C to 60°C).
The HPWH will heat potable water up to 150°F.
When the HPWH is operating properly the water temperature
rise through the condenser (heat exchanger) will be
approximately 8°F to 12°F (4°C to 7°C).
REFRIGERANT CHARGE
The HPWH is factory-charged with R-134a refrigerant. The
refrigerant charge is weighed in at the factory. See Table
9 on page 34. It should not be necessary to add or
remove refrigerant during installation or start up.
EQUIPMENT DISPOSAL
This heat pump water heater contains R-134a refrigerant and is
regulated as a stationary refrigeration appliance under Section
608 of the Clean Air Act. Disposal of this unit must be performed
in accordance with the provisions in Section 608 of the Clean Air
Act and any state or local regulations that may also apply. See
Qualifications on page 8.

12
COMPONENT REFRIGERATION CIRCUIT
1) COMPRESSOR
2) HOT GAS LINE
3) CONDENSER / HEAT EXCHANGER
4) LIQUID LINE
5) THERMOSTATIC EXPANSION VALVE (TXV)
6) EVAPORATOR
7) SUCTION LINE
8) ACCUMULATOR
REFRIGERANT STATE
GAS
GAS
GAS TO LIQUID
LIQUID
LIQUID
LIQUID TO GAS
GAS
GAS / LIQUID
COMPONENT WATER CIRCUIT
A) WATER INLET
B) HEAT EXCHANGER / CONDENSER
C) WATER OUTLET
WARM RETURN
AIR IN
COOL SUPPLY
AIR OUT
ACCUMULATOR
COMPRESSOR
CONDENSATE
DRAIN
SUPPLY AIR
OUTLET
EVAPORATOR COIL
(HEAT EXCHANGER)
(AIR TO REFRIGERANT)
RETURN AIR
INLET
(AIR FILTERS)
BLOWER
BLOWER
MOTOR
THERMOSTATIC
EXPANSION VALVE (TXV)
CONTROL
PANEL
CONDENSER
(HEAT EXCHANGER)
(REFRIGERANT TO WATER)
FEATURES AND COMPONENTS
10
Figure 1
PRODUCT ILLUSTRATIONS
EVAPORATOR
(HEAT EXCHANGER)
(WATER TO REFRIGERANT)
THERMOSTATIC
EXPANSION VAVLE
(TXV)
ACCUMULATOR
RECIEVER
ELECTRICAL PANEL
HEATED
WATER INLET
HEATED
WATER OUTLET
CONDENSER
(HEAT EXCHANGER)
(REFRIGERANT TO POTABLE WATER)
COMPRESSOR
COMPONENT REFRIGERATION CIRCUIT
COMPRESSOR
CONDENSER (HEAT EXCHANGER)
RECIEVER
FILTER DRIER
THERMOSTATIC EXPANSION VALVE (TXV)
EVAPORATOR (HEAT EXCHANGER)
ACCUMULATOR
REFRIGERANT STATE
GAS
GAS TO LIQUID
LIQUID
LIQUID
LIQUID
LIQUID TO GAS
GAS / LIQUID
COMPONENT HEATED WATER CIRCUIT
HEATED WATER INLET
CONDENSER (HEAT EXCHANGER)
HEATED WATER OUTLET
FILTER DRIER
SOURCE
WATER OUTLET
SOURCE
WATER INLET
COMPONENT SOURCE WATER CIRCUIT
SOURCE WATER INLET
EVAPORATOR (HEAT EXCHANGER)
SOURCE WATER OUTLET
Figure 1
COMPONENT REFRIGERATION CIRCUIT
COMPRESSOR
CONDENSOR (HEAT EXCHANGER)
RECIEVER
FILTER DRIER
THERMOSTATIC EXPANSION VALVE (TXV)
EVAPORATOR (HEAT EXCHANGER)
ACCUMULATOR
COMPONENT HEATED WATER CIRCUIT
HEATED WATER INLET
CONDENSOR (HEAT EXCHANGER)
HEATED WATER OUTLET
REFRIGERANT STATE
GAS
GAS TO LIQUID
LIQUID
LIQUID
LIQUID
LIQUID TO GAS
GAS / LIQUID

13
COMPONENT REFRIGERATION CIRCUIT
1) COMPRESSOR
2) HOT GAS LINE
3) CONDENSER / HEAT EXCHANGER
4) LIQUID LINE
5) THERMOSTATIC EXPANSION VALVE (TXV)
6) EVAPORATOR
7) SUCTION LINE
8) ACCUMULATOR
REFRIGERANT STATE
GAS
GAS
GAS TO LIQUID
LIQUID
LIQUID
LIQUID TO GAS
GAS
GAS / LIQUID
COMPONENT WATER CIRCUIT
A) WATER INLET
B) HEAT EXCHANGER / CONDENSER
C) WATER OUTLET
WARM RETURN
AIR IN
COOL SUPPLY
AIR OUT
ACCUMULATOR
COMPRESSOR
CONDENSATE
DRAIN
SUPPLY AIR
OUTLET
EVAPORATOR COIL
(HEAT EXCHANGER)
(AIR TO REFRIGERANT)
RETURN AIR
INLET
(AIR FILTERS)
BLOWER
BLOWER
MOTOR
THERMOSTATIC
EXPANSION VALVE (TXV)
CONTROL
PANEL
CONDENSER
(HEAT EXCHANGER)
(REFRIGERANT TO WATER)
FEATURES AND COMPONENTS
10
Figure 1
PRODUCT ILLUSTRATIONS
11
TABLE 1
MODEL
NUMBER
PERFORMANCE
SOURCE
WATER
FLOW
WATER
FLOW
(GPM)
DIMENSIONS
WEIGHT
(LBS)
WATER
HEATING
CAPACITY
COOLING
CAPACITY
COP INLET
OUTLET
WATER
(FPT)
LENGTH
A
WIDTH
B
HEIGHT
C
kW Btu/hr* Btu/hr Tons
C270WM 77 264,100 198,950 22 4.1 50 50 2”34.5 35.5 71 975
C540WM 155 528,200 398,000 44 4.1 100 100 2" 69 35.5 71 1,950
C810WM 232 792,300 597,000 66 4.1 150 150 2”103.5 35.5 71 2,925
C1080WM 310 1.056M 796,050 88 4.1 200 200 2”varies 71 3,900
C1350WM 387 1.321M 995,100 110 4.1 250 250 2”varies 71 4,875
C1620WM 464 1.585M 132 4.1 300 300 2” varies 71 5,850
All unit foot print dimensions are in inches. Weights are approximate shipping weights.
*Performance rating at 75ºF Entering Source Water Temperature and 100ºF Entering Heated Water Temperature. (EWT)
COP = Coefficient Of Performance
All models standard 208/230 VAC, 3Ø, 60 Hz
Optional: 460 VAC, 3Ø, 60 Hz or 400/3/50
Figure 2
PERFORMANCE SPECIFICATIONS
ROUGH IN DIMENSIONS
C1890WM
(GPM)
1.194M
1.849M
542 1.393M 144 4.1 350 350 2" varies
71
6,825
C270WM
98
Dimensions
27 1
2
"
28"
28"
ELECTRICAL
SERVICE DOOR
REFRIGERATION
SERVICE DOOR
34 1
2
"
3'-0"
5'-11
1
2
"
C270WM
SERVICE AREA
35 1
2
"
61 1
8
"
62 3
8
"
FRONT
WATER CONNECTIONS
71”

14
12
INSTALLATION REQUIREMENTS
Read all installation requirements in this manual before installation
begins. The installation must conform to these instructions and
all local and national code authority having jurisdiction.
Costs to diagnose, perform service and repair damage caused
by installation errors are not covered under the limited warranty.
Costs to correct installation errors are not covered under the
limited warranty.
WATER TEMPERATURE
MAXIMUM SYSTEM TEMPERATURE
The HPWH units covered in this manual are capable of
maintaining a maximum system/storage tank temperature of
150°F (66°C). Some commercial water heating applications
may require higher temperatures. Install a booster water heater
downstream from the storage tank for temperatures above
150°F (66°C). See Figure 8 on page 20.
INLET & OUTLET WATER TEMPERATURE
The inlet (entering) water temperature operating range for the
HPWH is 40°F to 140°F (4.4°C to 60°C). The water temperature
rise (Delta T - ∆T) through the condenser (heat exchanger) will
be approximately 8°F to 12°F (4°C to 7°C).
Outlet water temperatures up to 152°F (67°C) are possible
during normal operation. Exposure to water temperatures this
high can cause serious bodily injury or death. See Mixing
Valves and Table 5 on pages 15-16.
Service & Installation Notes:
If the inlet (entering) water temperature is outside the operating
temperature range for extended periods the control system may
lock out on high or low refrigerant pressure switch events/trips.
When the control system locks out on a refrigerant pressure
switch event the compressor will stop running, the blower and
circulation pump (on models equipped with factory installed
pump) will continue to operate. This is a hard lock out condition.
The control system is manually reset by cycling power to the
HPWH off and then on again.
The tank thermostat must not be set any higher than 150°F
(66°C) to prevent control system lock outs.
Ground water temperatures can fall below 50°F (10°C) for
extended periods during winter months in many regions. For this
reason the cold water supply lines and should not be connected
directly to the HPWH inlet or T tted into the inlet (return) water
piping. The cold water supply lines should be connected directly
to the storage tank only. See the Piping Diagrams on page 41
in this manual for more information.
SOURCE WATER TEMPERATURE
ENTERING SOURCE WATER TEMPERATURE
The entering source water temperature range of operation for
the unit is 40° - 100°F (4.4°C to 38°C). The source temperature
drop (Delta T - ∆T) through the evaporator (heat exchanger) will
be approximately 8°F to 12°F (-13°C to -12°C).
If the source water temperature is outside this operating
range the HPWH unit’s Limit Thermostat will discontinue
heating operation until the entering source water temperature
returns to this operating range.
LOCATING THE WATER HEATER
PROPERTY DAMAGE!
•All water heaters may eventually leak.
•Do not install without adequate drainage.
CAUTION
INSTALLATION
Carefully choose a location for the HPWH unit. Placement is a
very important consideration for optimal performance and
safety.
Locate the HPWH near a oor drain. The unit should be located
in an area where leakage from the HPWH unit or the storage tank
it is connected to will not result in damage to the area adjacent
to the water heater or to lower floors of the structure. See Unit
Placement on page 24.
FREEZING TEMPERATURES
The HPWH unit must not be installed in space where freezing
temperature will occur, without a low ambient air kit.
Exposure to freezing ambient temperatures below 32°F (0°
C) may result in severe damage to internal components.
Damage caused by exposure to freezing temperatures is not
covered under the limited warranty.
COASTAL REGIONS
When the HPWH will be installed within 5 miles of a seacoast
the optional Corrosive Duty Package is recommended. The
corrosive duty package includes a stainless steel cabinet.
Damage caused to units not equipped with the corrosive
duty package in coastal regions is not covered under the limited
warranty.
HEAT SOURCE
The HPWH unit should be located where there is adequate
source water from which to extract waste heat and where the
source water cooling benefit can be utilized when possible.

15
TABLE 2
MODEL VOLTS/PHASE/HZ COMPRESSOR MCA MFS
RLA LRA MCC FLA
C270WM 208-230/3/60 18.60 100.00 29.00 28 45
440-480/3/60 10.90 77.00 17.00 17 25
400/3/50 5.40 39.00 8.50 9 12
C540WM 208-230/1/60 27.90 175.00 43.50 42 60
C60A 208-230/3/60 19.90 115.00 31.00 29 45
C60A 460/3/60 8.70 63.00 13.50 13 20
C90 208-230/3/60 24.00 196.00 37.50 35 50
C90 460/3/60 11.50 100.00 18.00 17 25
C125 208-230/3/60 28.20 225.00 44.00 40 60
C125 460/3/60 14.10 114.00 22.00 20 30
C185 208-230/3/60 35.30 239.00 55.00 49 80
C185 460/3/60 17.90 125.00 28.00 25 40
C250 208-230/3/60 48.10 300.00 75.00 68 110
C250 460/3/60 21.80 150.00 34.00 31 50
Abbreviations:
RLA = Running Load Amps; LRA = Locked Rotor Amps;
FLA = Full Load Amps; MCA = Minimum Circuit Ampacity;
MCC = Maximum Continuous Current;
MFS = Maximum Fuse Size
13
CLEARANCES
Figure 3
ELECTRICAL REQUIREMENTS
CORRECT POWER SUPPLY!
Ensure the power supply at the job site matches the
voltage and phase listed on the HPWH rating label
before connecting power to the HPWH unit.
•
Damage caused to the HPWH as the result of applying
the wrong voltage or phase is not covered under the
limited warranty.
•
Energizing the HPWH with the wrong voltage or phase
will cause permanent damage to the HPWH unit.
•
CAUTION
Ensure the power supply voltage and phase at the job site
matches the power supply ratings listed on the HPWH data
sticker label BEFORE INSTALLATION BEGINS.
The installation must conform with these instructions and the
local code authority having jurisdiction and the requirements
of the power company. In the absence of local codes, the
installation must comply with the current editions of the National
Electrical Code, ANSI/NFPA 70 or the Canadian Electrical Code
CSA C22.1.
Voltage applied to the HPWH should not vary more than +5% to
-10% of the voltage requirement listed on the HPWH rating label
for satisfactory operation.
VOLTAGE & AMPERAGE RATINGS
To ensure optimal performance a minimum of 36 inches clearance
is required from the front of the HPWH unit and any wall
obstruction.
RLA LRA MCC FLA MCA MFS MCA MFS
C270WM 208-230/3/60 130.0 560.0 130.0 83.3 1 163 293 163 293
460/3/60 72.7 270.0 79.0 50.6 1 91 164 91 164
380-400/3/50 72.7 270.0 79.0 50.6 1 91 164 91 164
C540WM 208-230/3/60 130.0 560.0 130.0 83.3 2 163 293 325 585
460/3/60 72.7 270.0 79.0 50.6 2 91 164 182 327
380-400/3/50 72.7 270.0 79.0 50.6 2 91 164 182 327
C810WM 208-230/3/60 130.0 560.0 130.0 83.3 3 163 293 488 878
460/3/60 72.7 270.0 79.0 50.6 3 91 164 273 491
380-400/3/50 72.7 270.0 79.0 50.6 3 91 164 273 491
C1080WM 208-230/3/60 130.0 560.0 130.0 83.3 4 163 293 650 1170
460/3/60 72.7 270.0 79.0 50.6 4 91 164 364 654
380-400/3/50 72.7 270.0 79.0 50.6 4 91 164 364 654
C1350WM 208-230/3/60 130.0 560.0 130.0 83.3 5 163 293 813 1463
460/3/60 72.7 270.0 79.0 50.6 5 91 164 454 818
380-400/3/50 72.7 270.0 79.0 50.6 5 91 164 454 818
C1620WM 208-230/3/60 130.0 560.0 130.0 83.3 6 163 293 975 1755
460/3/60 72.7 270.0 79.0 50.6 6 91 164 545 981
380-400/3/50 72.7 270.0 79.0 50.6 6 91 164 545 981
C1890WM 208-230/3/60 130.0 560.0 130.0 83.3 7 163 293 1138 2048
460/3/60 72.7 270.0 79.0 50.6 7 91 164 636 1145
380-400/3/50 72.7 270.0 79.0 50.6 7 91 164 636 1145
C2160WM 208-230/3/60 130.0 560.0 130.0 83.3 8 163 293 1300 2340
460/3/60 72.7 270.0 79.0 50.6 8 91 164 727 1309
380-400/3/50 72.7 270.0 79.0 50.6 8 91 164 727 1309
MODEL VOLTS/PHAZE/HZ
PERCOMPRESSOR
#OFCOMPRESSORS
PERC270WMDISCONNECT
TOTALINCOMING
TABLE 2 Figure 3
NOTE: Each WM unit is made of multiple C270WM units. The above data is based on each unit having it’s own disconnect. The total
incoming MCA and MFS are used for the power needed in the building if all units were run o of one disconnect.
Abbreviation Denitions For Table 2 Figure 3
RLA-Rated Load Amps
FLA-Full Load Amps
LRA-Locked Rotor Amps
MCA-Minimum Circuit Ampacity
MCC-Maximum Continuous Current
MFS-Maximum Fuse Size

16
14
Table 2 on page 13 provides the MCA (Minimum Circuit
Ampacity) and MFS (Maximum Fuse Size). Use MCA to select
the minimum field wires size to power the unit and MFS to select
the maximum fuse size for over current protection as follows:
Where: MCA= C x 1.25
MFS = C x 2.25
C - Compressor
MINIMUM CIRCUIT AMPACITY & MAXIMUM FUSE SIZE
Before removing any access panels or
servicing the water heater, make sure
the electrical supply to the water heater
is turned “OFF.”
Electrical Shock Hazard
•
Failure to do this could result in death,
serious bodily injury, or property
damage.
•
+The load current rating and the overcurrent protection for these conductors shall not exceed 15 amperes for 14 AWG. 20 amperes for 12 AWG and 30 amperes for
10 AWG copper; or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper-clad aluminum.
*For dry locations only. See 75°C column for wet locations.
MINIMUM WIRE SIZE
Allowable Ampacities of Insulated Conductors
Single-phase heat pump water heaters are two wire circuits. Three-phase heaters are three wire circuits. In addition to the foregoing,
a grounded conductor is required. Not more than three conductors in raceway, cable, or earth (directly buried), based on ambient
temperature of 30°C (86°F)
TABLE 3

17
15
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements
or such conditions as high line pressure, among others, have
installed devices such as pressure reducing valves, check
valves, and back ow preventers. Devices such as these cause
the water system to be a closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a closed
system the volume of water will grow when it is heated. As the
volume of water grows there will be a corresponding increase
in water pressure due to thermal expansion. Thermal expansion
can cause premature failure (leakage) of storage tanks, water
heaters and HPWH components such as the condenser.
Leakage caused by thermal expansion is not covered under the
HPWH limited warranty.
Thermal expansion can also cause intermittent Temperature-
Pressure Relief Valve operation: water discharged due to
excessive pressure build up. The Temperature-Pressure Relief
Valve is not intended for the constant relief of thermal expansion.
A properly sized thermal expansion tank must be installed on
all closed systems to control the harmful effects of thermal
expansion. Contact a local plumbing service agency to have a
thermal expansion tank installed on all closed water systems.
MIXING VALVES
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting devices such as
mixing valves must be installed
when required by codes and to
ensure safe temperatures at fixtures.
Water heated to a temperature which will satisfy clothes washing,
dish washing, and other sanitizing needs can scald and cause
permanent injury upon contact. See Table 5, page 16.
Some people are more likely to be permanently injured by hot
water than others. These include the elderly, children, the inrm
and the physically/mentally disabled. The Table below shows
the approximate time-to-burn relationship for normal adult skin.
If anyone using hot water provided by the water heater being
installed ts into one of these groups or if there is a local code
or state law requiring a certain water temperature at the point of
use, then special precautions must be taken.
In addition to using the lowest possible temperature setting that
satises the demand of the application a Mixing Valve should be
installed upstream from the building xtures or at the hot water
taps to further reduce system water temperature.
Mixing valves are available at plumbing supply stores. Consult
a Qualied Installer or Service Agency. Follow the mixing valve
manufacturer’s instructions for installation of the valves.
WATER PIPING
Read all installation requirements in this manual before
installation begins.
The water piping installation must conform to these instructions
and to all local and national code authority having jurisdiction.
Costs to diagnose, perform service and repair damage caused
by installation errors are not covered under the limited warranty.
Costs to correct installation errors are not covered under the
limited warranty.
MINIMUM PIPE SIZE
The inlet (return) and outlet (supply) water piping installed
between the HPWH unit and the storage tank must not be
smaller than the water connection sizes on the HPWH. See
Table 4, below, for water line connection sizes and water flow
rates.
Water line sizing is a critical installation requirement.
Installing undersized water piping between the storage tank
and the HPWH unit will cause insufficient water flow and will
have an adverse impact on performance and equipment life.
WATER CONNECTIONS AND FLOW
UNIT GPM CONNECTION SIZE (INCH)
C270 50 2"
C540 100 2"
C810 150 2"
C1080 200 2"
C1350 250 2"
C1620 300 2"
PIPE SUPPORT
All water piping must be properly supported per local code
requirements.
PIPE INSULATION
All piping installed between the HPWH unit and the storage tank
must be insulated.
COLD WATER SUPPLY
Cold water supply lines should not be connected directly to the
HPWH inlet or T tted into the inlet (return) water piping. The cold
water supply lines should be connected directly to the storage
tank only. See Inlet & Outlet Water Temperature on page 9
and Figure 7 and Figure 8 on page 20.
WATER PRESSURE
System water pressure should be maintained between 40 and 60
PSI. Local code may require, and the manufacturer recommends,
installing a pressure reducing valve (PRV) in the cold water
supply to the building to maintain consistent water pressure.
Table 4
C1890 350 2"

18
16
connected to the storage tank. If more than one water heating
appliance is connected to the storage tank the aggregate total
of all heating input ratings of all connected appliances must be
factored when choosing a T&P valve for the storage tank.
The pressure rating of the T&P valve should always be rated
equal to or below the working pressure rating of the storage tank
or water heater, whichever rating is lower.
Contact the manufacturer of the storage tank for assistance in
sizing of a temperature and pressure relief valve. Follow the
storage tank manufacturer’s instructions regarding the proper
installation of these products.
TANK SELECTION
The HPWH unit is not an instantaneous water heater and must
be connected to a storage tank. Storage tank congurations must
meet these criteria:
1. The HPWH must not be connected directly to a standard gas
or electric water heater.
2.
3.
If the HPWH is connected to a used storage tank, the tank
should be thoroughly cleaned of scale and sediment before
the HPWH is installed.
Connection ports used on the storage tank must permit the
recommended ow r ate t hrough H PWH. T he connection
ports used on the storage tank must not be smaller than the
inlet outlet connection sizes on the HPWH unit. See Table 4
on page 15.
4. Water heated by the HPWH should be returned to the tank at
a location that is above the level of the tank’s cold water inlet
and/or the heat pump’s inlet source.
5. The HPWH unit’s inlet and outlet lines to the storage tank
should be dedicated. Example: no other line (such as a
building re-circulating loop or cold water supply) should be
connected to the HPWH unit’s inlet or outlet water lines.
SOLAR TANKS
Solar tanks should be used with caution. Some solar tanks with
top connections have dip tubes which may signicantly reduce
the efciency performance of the HPWH unit.
Before using any solar tank in this application, contact your
representative or call the toll free technical support number on
the back cover of this manual for further assistance.
TABLE 5
Water Temperature Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
180°F (82°C) Nearly instantaneous
170°F (77°C) Nearly instantaneous
160°F (71°C) About 1/2 second
150°F (66°C) About 1-1/2 seconds
140°F (60°C) Less than 5 seconds
130°F (54°C) About 30 seconds
120°F (49°C) More than 5 minutes
CONTAMINATED WATER
Connecting the heat pump to any system other than a water
system may lead to premature corrosion of the unit's heat
exchanger and void the unit warranty.
Corrosive Chemical Hazard
•
This HPWH unit must not be used to heat any uid other than
water. Corrosive chemicals must not be introduced into the
waterways in this HPWH unit.
TEMPERATURE - PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in the designated
opening in the storage tank.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
This heat pump water heater should only be connected to a
storage tank with a properly rated/sized and certied combination
temperature - pressure relief valve. The valve must be certied by
a nationally recognized testing laboratory that maintains periodic
inspection of production of listed equipment of materials as
meeting the requirements for Relief Valves for Hot Water Supply
Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of
ASME.
When the HPWH unit is connected to a storage tank a temperature
and pressure relief valve must be installed in the designated
opening for the T&P valve per the storage tank manufacturer’s
requirements. The T&P valve’s Btu/hr rating must be equal to
or greater than the total heating input rating of all water heaters

19
16
connected to the storage tank. If more than one water heating
appliance is connected to the storage tank the aggregate total
of all heating input ratings of all connected appliances must be
factored when choosing a T&P valve for the storage tank.
The pressure rating of the T&P valve should always be rated
equal to or below the working pressure rating of the storage tank
or water heater, whichever rating is lower.
Contact the manufacturer of the storage tank for assistance in
sizing of a temperature and pressure relief valve. Follow the
storage tank manufacturer’s instructions regarding the proper
installation of these products.
TANK SELECTION
The HPWH unit is not an instantaneous water heater and must
be connected to a storage tank. Storage tank congurations must
meet these criteria:
1. The HPWH must not be connected directly to a standard gas
or electric water heater.
2.
3.
If the HPWH is connected to a used storage tank, the tank
should be thoroughly cleaned of scale and sediment before
the HPWH is installed.
Connection ports used on the storage tank must permit the
recommended ow r ate t hrough H PWH. T he connection
ports used on the storage tank must not be smaller than the
inlet outlet connection sizes on the HPWH unit. See Table 4
on page 15.
4. Water heated by the HPWH should be returned to the tank at
a location that is above the level of the tank’s cold water inlet
and/or the heat pump’s inlet source.
5. The HPWH unit’s inlet and outlet lines to the storage tank
should be dedicated. Example: no other line (such as a
building re-circulating loop or cold water supply) should be
connected to the HPWH unit’s inlet or outlet water lines.
SOLAR TANKS
Solar tanks should be used with caution. Some solar tanks with
top connections have dip tubes which may signicantly reduce
the efciency performance of the HPWH unit.
Before using any solar tank in this application, contact your
representative or call the toll free technical support number on
the back cover of this manual for further assistance.
TABLE 5
Water Temperature Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
180°F (82°C) Nearly instantaneous
170°F (77°C) Nearly instantaneous
160°F (71°C) About 1/2 second
150°F (66°C) About 1-1/2 seconds
140°F (60°C) Less than 5 seconds
130°F (54°C) About 30 seconds
120°F (49°C) More than 5 minutes
CONTAMINATED WATER
Connecting the heat pump to any system other than a water
system may lead to premature corrosion of the unit's heat
exchanger and void the unit warranty.
Corrosive Chemical Hazard
•
This HPWH unit must not be used to heat any uid other than
water. Corrosive chemicals must not be introduced into the
waterways in this HPWH unit.
TEMPERATURE - PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in the designated
opening in the storage tank.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
This heat pump water heater should only be connected to a
storage tank with a properly rated/sized and certied combination
temperature - pressure relief valve. The valve must be certied by
a nationally recognized testing laboratory that maintains periodic
inspection of production of listed equipment of materials as
meeting the requirements for Relief Valves for Hot Water Supply
Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of
ASME.
When the HPWH unit is connected to a storage tank a temperature
and pressure relief valve must be installed in the designated
opening for the T&P valve per the storage tank manufacturer’s
requirements. The T&P valve’s Btu/hr rating must be equal to
or greater than the total heating input rating of all water heaters
17
Potentially harmful fumes and vapors could be introduced
into occupied spaces. See Unit Placement on page 18.
STORAGE & HANDLING
HEAVY OBJECT!
All Heat Pump Water Heaters (HPWHs) covered by this manual
are beyond the safe lifting weight for one person. Use
proper conveyance equipment to move the unit for storage
or during installation. Use OSHA approved safety equipment
when moving the unit
.
The heat pump water heaters covered in this manual are
stationary refrigeration appliances. Careful handling is necessary
to prevent internal damage.
• IMPORTANT: Do not remove, cover or deface any
permanent instructions, wiring diagrams, labels, or the
rating label from the outside cabinet or the inside panels on
the HPWH unit.
• Do not tilt the unit beyond 45° at any time. All internal
components are braced from the base of unit. Tilting may
compromise the refrigeration piping inside unit and cause
refrigerant leaks.
•Do not hoist the unit with chains or straps unless
spreader bars are furnished and used as depicted in
Figure 4 and Figure 5. The side panels and roof of the
unit are not constructed to handle significant force from
the sides or above.
•When using a forklift to raise the HPWH unit ensure the
forks are positioned correctly between the runners on the
bottom of the HPWH unit. See Figure 6.
•The HPWH unit must be lifted from the front side only
when using a forklift to raise the unit. See Figure 6.
COMPRESSOR
SIDE SPREADER
BAR
SUPPORT BARS
RIGGING
FRONT
Figure 4
SPREADER
BAR
SIDE
Figure 5
Figure 6
STORAGE RECOMMENDATIONS
The HPWH units should be stored indoors. Do not stack units or
stack other construction materials on the units while in storage.
The HPWH units contain electrical/electronic components
and should only be stored in conditions between 0ºF to 110°F
(-17°C to 43°C) and 5 to 95 percent relative humidity. Electrical
components are not moisture-tolerant.
NOTE: The limited warranty does not cover damage to the unit or
controls due to negligence during storage.
The pictures may appear different than your actual unit, all information
and reference to lifting applies to all of our models.
,

20
INSTALLATION
REQUIRED ABILITY
Installation and service of the HPWH unit requires ability
equivalent to that of a qualied agency in the eld involved.
Plumbing, ducting and electrical work are required.
See Qualifications on page 8.
GENERAL
The installation must conform with these instructions and the
local code authority having jurisdiction. In the absence of local
codes, the installation must comply with the latest editions of
the National Electrical Code, ANSI/NFPA 70 or the Canadian
Electrical Code CSA C22.1. The National Electrical Code
may be ordered from: National Fire Protection Association, 1
Batterymarch Park, Quincy, MA 02269. The Canadian Electrical
Code is available from the Canadian Standards Association,
8501 East Pleasant Valley Road, Cleveland, OH 44131.
DO NOT start the HPWH unit or test the electrical system before
it is connected to the water system, purged of air and filled with
water. See Start Up on page 25.
See Features And Components on page 10 to identify
the principal components of the HPWH. (Some units will vary)
REQUIRED TOOLS AND MATERIALS
INSTALLATION & START UP TOOLS
1. All tools common to installation and service of commercial
electric water heaters such as hand tools, pipe cutter and
torch.
2. Heat transfer compound (paste) such as Honeywell part
number 107408 or equivalent.
3. Electrical switch lock out device - used to secure disconnect
switches/breaker panels while servicing.
4. Electronic thermometer including:
• Four (4) thermocouple sensors capable of measuring
surface temperatures on water or refrigerant piping up to
2 inch diameter.
• Temperature range 32°F - 210°F (0°C - 100°C).
5. Volt-Ohm Multi Meter - capable of measuring:
• AC Voltage up to 600 VAC.
• DC Voltage up to 24 VDC.
• Ohms up to 2,000,000 ohms.
• Continuity.
6. AC amp meter - capable of measuring:
• AC amperage up to 200 amps.
7. Calculator.
SERVICE TOOLS
See Qualifications on page 8regarding regulations and
certications required under Section 608 of the Clean Air Act
before servicing the refrigeration circuit.
1. Refrigeration manifold gauges.
2. Refrigeration charging scale.
3. Refrigeration vacuum pump.
4. Refrigerant recovery machine.
5. Refrigerant reclamation storage tank.
UNIT PLACEMENT
Whether replacing existing water heating equipment or installing
the HPWH in new construction, the following critical points must
be observed: The HPWH unit:
1. Should be installed near a floor drain for condensate removal.
2. The HPWH, storage tank and water heater(s) should be
located in an area where leakage will not result in damage
to adjacent area or to lower floors in the building structure.
3. The HPWH unit must be level for proper condensate
drainage. Shim the channel type skid base, pad or floor as
necessary if levelling is required.
4. Should be installed close to the point of major hot water
usage and power supply.
5. Should be located so that hot water piping and branch circuit
wiring will be as short as possible.
Mounting Frame
The mounting frame must support the length, width, and weight
of the HPWH unit. The weight of the HPWH unit must be evenly
dispersed across the footing channels on the bottom of the unit.
See Table 1 on page 11 for unit dimensions and weights.
1. VIBRATION ISOLATORS ARE REQUIRED to prevent
transmission of mechanical vibration into the building
structure. Selection of suitable isolators should be made by a
qualified engineer.
2. Installation must meet local seismic restraint requirements.
PAD MOUNTING
The HPWH may be pad mounted. Vibration isolator mounts
MUST BE placed between the unit and the equipment pad to
prevent mechanical vibration transmitting into the building
structure. Selection of appropriate vibration isolators should be
made by a qualified engineer.
18