Daikin WRA048, WRA060, WRA072, WRA120, WRA150 Installation And Maintenance Data
...
Installation and Maintenance Data
Daikin Water to Water Source Heat Pumps
3 to 35 Tons with R-410A
WRA - Heating and Cooling Models
WHA - Heating Only Models
WCA - Cooling Only Models
IM 1072-1
Group: WSHP
Part Number: 667691802
Date: October 2013
©2013 Daikin Applied • www.DaikinAP.com • (800) 432-1342
Contents
Product Nomenclature ........................................................3
Safety Information ...............................................................4
Safe Operation Rules .......................................................4
Electrical Data ......................................................................5
WRA, WHA, WCA 036 – 420 ............................................5
Installation ............................................................................6
Pre-Installation and Code Requirements ..........................6
Mounting the Unit..............................................................6
Piping the Unit ..................................................................6
Domestic Hot Water Heat Recovery .................................6
Applications .........................................................................7
Start Up .................................................................................8
Check the following before powering the unit. ..................8
Maintenance Procedures ..................................................8
Dimensional Data ................................................................9
WRA, WCA, WHA – Size 036-072....................................9
WRA, WCA, WHA – Size 120-180..................................10
WRA, WCA, WHA – Size 240-420..................................11
Engineering Data ...............................................................12
Physical Data ..................................................................12
Operating Pressures (PSIG) ...........................................12
Antifreeze Correction ......................................................13
Waterow Correction ......................................................13
Wiring Diagram ..................................................................14
208-230/60/1, Unit Sizes 036, 048, 060 and 072 ...........14
Legend ............................................................................15
Control ................................................................................16
Optional Low Temperature Control Board "LTC" – 208-
230/60/1, Unit Sizes 036, 048, 060 and 072...................16
Compressor Control Module Functional Operation – 208-
230/60/1, Unit Sizes 036, 048, 060 and 072...................17
Wiring Diagram ..................................................................18
208-230/60/3, Unit Sizes 036, 048, 060 and 072 ...........18
Legend ............................................................................19
Control ................................................................................20
Optional Low Temperature Control Board "LTC" – 208-
230/60/3, Unit Sizes 036, 048, 060 and 072...................20
Compressor Control Module Functional Operation – 208-
230/60/3, Unit Sizes 036, 048, 060 and 072...................21
Wiring Diagram ..................................................................22
208-230/60/3, Unit Sizes 120, 150, 180, 240 and 300 ...22
(Continued) 208-230/60/3, Unit Sizes 120, 150, 180, 240
and 300 ...........................................................................23
Legend ............................................................................24
Control ................................................................................25
Optional Low Temperature Control Board "LTC" – 3 Phase,
Unit Sizes 120, 150, 180, 240 and 300...........................25
Compressor Control Module Functional Operation – 208-
230/60/3, Unit Sizes 120, 150, 180, 240 and 300 ..........26
Wiring Diagram ..................................................................27
208/230-60-3, Unit Sizes 360, 420 .................................27
(Continued) 208/230-60-3, Unit Sizes 360, 420 .............28
Legend ............................................................................29
Control ................................................................................30
Optional Low Temperature Control Board "LTC" – 208/230-
60-3, Unit Sizes 360, 420 ...............................................30
Compressor Control Module Functional Operation –
208/230-60-3, Unit Sizes 360, 420 .................................31
Wiring Diagram ..................................................................32
460-60-3, 575-60-3, Unit Sizes 360, 420 ........................32
(Continued) 460-60-3, 575-60-3, Unit Sizes 360, 420 ....33
Legend ............................................................................34
Control ................................................................................35
Optional Low Temperature Control Board "LTC" – 460-60-
3, 575-60-3, Unit Sizes 360, 420 ....................................35
Compressor Control Module Functional Operation – 460-
60-3, 575-60-3, Unit Sizes 360, 420 ...............................36
WHA Circuit Diagram ........................................................37
WRA Circuit Diagram ........................................................38
WCA Circuit Diagram ........................................................39
Check, Test and Start Form ..............................................40
General Service Guide ......................................................41
Replacement Parts List .....................................................42
Page 2 of 44 Water to Water Source Heat Pumps IM 1072-1
Product Nomenclature
W WRA 1 036 E F T F YY FS A C Y A PVM
Product Category
W = WSHP
Product Identier
WRA = Heating and Cooling Models
WHA = Heating Only Models
WCA = Cooling Only Models
Design Series
1 = 1st Design
2 = 2nd Design
3 = 3rd Design
4 = 4th Design
Nominal Capacity
036 = 36,000 Btuh Nominal Cooling
048 = 48,000 Btuh Nominal Cooling
060 = 60,000 Btuh Nominal Cooling
072 = 72,000 Btuh Nominal Cooling
120 = 120,000 Btuh Nominal Cooling
150 = 150,000 Btuh Nominal Cooling
180 = 180,000 Btuh Nominal Cooling
240 = 240,000 Btuh Nominal Cooling
300 = 300,000 Btuh Nominal Cooling
360 = 360,000 Btuh Nominal Cooling
420 = 420,000 Btuh Nominal Cooling
Water Piping Location
F = Front
T = Top
L = Left Hand Side
R = Right Hand Side
Status Lights
YY = None
SL = Three Lights-Compressor-1, Compressor-2, Compressor fault
Controls
E = Electromechanical
T = Temperature
Control System
Voltage
E = 208-230/60/1
F = 208-230/60/3
K = 460/60/3
L = 575/60/3
Control Box Location
F = Front
L = Left Side Control Box
R = Right Side Control Box
Source Water to Refrigerant
Heat Exchanger Construction
C = Copper Inner Tube Steel Outer Tube
S = Cupro-Nickel Inner Tube Steel Outer Tube
Y = None
Construction Type
A = Standard
Freezestat
YY = None
FS = Adjustable for Geothermal and Boiler/Tower Application
Refrigerant
A = R-410A
Desuperheater
Y = None
D = Waste Heat Recovery
Water Heater
Cabinet Electrical
YYY = None
PVM = Phase Monitor
Monitors Voltage
and Phase Loss
NOTE: For illustration purposes only. Not all options available with all models. Please consult your local Daikin Representative for specic
availability.
IM 1072-1 Water to Water Source Heat Pumps Page 3 of 44
Safety Information
Safe Operation Rules
Installation and maintenance are to be performed only by
qualied personnel who are familiar with and in compliance with
state, local and national codes and regulations, and experienced
with this type of equipment.
Please take a few minutes to read the instructions before
you install the heat pump. This will help you obtain the full
value from this unit. It will also help you avoid needless costs
that result from incorrect installation and are not covered in
the warranty.
Follow these instructions carefully. Failure to do so could
cause a malfunction of the heat pump, resulting in injury, death
and/or property damage.
Tubing and compressor contain high pressure refrigerant and
they must not be exposed to high temperature or be punctured.
WARNING
To prevent electrical shock, disconnect electric power to
system at main fuse or circuit breaker box until installation is complete.
CAUTION
Sharp edges can cause personal injury. Avoid contact with
them.
Safety and Signal Words
The signal words DANGER, WARNING and CAUTION
are used to identify levels of hazard seriousness. The signal word
DANGER is only used on product labels to signify an immedi-
ate hazard. The signal words WARNING and CAUTION will
be used on product labels and throughout this manual and other
manuals that may apply to the product.
DANGER
Immediate hazards which WILL result in severe personal
injury or death.
Danger Label
White lettering on a black background except the word
DANGER which is white with a red background.
Electric Shock Hazard.
Turn Off All Power
Before Servicing.
Warning Label
White lettering on a black background except the word
WARNING which is white with an orange background.
Fire Hazard.
Use copper wire only.
Failure to observe
could result in property
damage, bodily injury
or death
Caution Label
White lettering on a black background except the word CAU-
TION which is white with a yellow background.
WARNING
Hazards or unsafe practices which COULD result in severe
personal injury or death.
CAUTION
Hazards or unsafe practices which COULD result in minor
personal injury or product or property damage.
Page 4 of 44 Water to Water Source Heat Pumps IM 1072-1
Cuts and Abrasion
Hazard.
Wear gloves and handle
with care.
Failure to observe could
result in bodily injury.
WARNING
This unit contains HFC-(R-410A), a azeotropic mixture of
R-32 (Diuoromethane) and R-125 (Pentauoroethane).
Do Not Vent HFC-(R-410A) to the atmoshpere. The U.S.
Clean Air Act requires the recovery of any residual refrigerant. Do not use R-22 service equipment or components on R-410A systems.
WRA, WHA, WCA 036 – 420
Table 1: Electrical data
Unit Size Voltage/Hz/Ph
208-230/60/1
036
048
060
072
120
150
180
240
300
360
420
208-230/60/3 10.4 73.0 20.8 187/253 13.0
460/60/3 5.8 38.0 11.6 414/506 7.3
575/60/3 3.8 36.5 7.6 517/632 4.8
208-230/60/1
208-230/60/3 13.6 83.1 27.2 187/253 17.0
460/60/3 6.1 41.0 12.2 414/506 7.6
575/60/3 4.2 33.0 8.4 517/632 5.3
208-230/60/1
208-230/60/3 16.1 91.0 32.2 187/253 20.1
460/60/3 7.1 46.0 14.2 414/506 8.9
575/60/3 5.6 37.0 11.2 517/632 7.0
208-230/60/1
208-230/60/3 20.6 155.0 41.2 187/253 25.8
460/60/3 9.7 75.0 19.4 414/506 12.1
575/60/3 7.7 54.0 15.4 517/632 9.6
208-230/60/1
208-230/60/3 16.1 91.0 32.2 187/253 36.2
460/60/3 7.1 46.0 14.2 414/506 16.0
575/60/3 5.6 37.0 11.2 517/632 12.6
208-230/60/3
460/60/3 9.7 75.0 19.4 414/506 21.8
575/60/3 7.7 54.0 15.4 517/632 17.3
208-230/60/3
460/60/3 12.2 100.0 24.4 414/506 27.5
575/60/3 9.0 78.0 18.0 517/632 20.3
208-230/60/3
460/60/3 16.7 114.0 33.4 414/506 37.6
575/60/3 12.2 80.0 24.4 517/632 27.5
208-230/60/3
460/60/3 18.0 125.0 36.0 414/506 40.5
575/60/3 12.9 80.0 25.8 517/632 29.0
208-230/60/3
460/60/3 23.1 150.0 46.2 414/506 52.0
575/60/3 19.9 109.0 39.8 517/632 44.8
208-230/60/3
460/60/3 27.0 173.0 54.0 414/506 60.8
575/60/3 23.8 132.0 47.6 517/632 53.6
Quantity RLA (each) LRA (each)
Legend:
FLA = Full Load Amps
HACR = Heating, Air Conditioning and Refrigeration Breaker
LRA = Lock Rotor Amps
RLA = Rated Load Amps
Compressor
Total Unit FLA
16.7 79.0 33.4 197/253 20.9
1
19.9 109.0 39.8 197/253 24.9
1
23.1 134.0 46.2 197/253 28.9
1
30.2 158.0 60.4 197/253 37.8
1
23.1 134.0 46.2 197/253 52.0
2
20.6 155.0 41.2 187/253 46.4
2
25.0 164.0 50.0 187/253 56.3
2
30.2 225.0 60.4 187/253 68.0
2
33.4 239.0 66.8 187/253 75.2
2
51.3 300.0 102.6 187/253 115.4
2
55.8 340.0 111 .6 187/253 125.6
2
Voltage
Min./Max.
Minimum Circuit
Ampacity
Electrical Data
Max. Circuit
Breaker
35
20
15
15
40
30
15
15
50
35
15
15
60
45
20
15
70
50
20
15
60
30
25
80
35
25
90
50
35
100
50
40
150
70
60
175
80
70
Maximum
Fuse HACR
Breaker
35
20
15
15
40
30
15
15
50
35
15
15
60
45
20
15
70
50
20
15
60
30
25
80
35
25
90
50
35
100
50
40
150
70
60
175
80
70
IM 1072-1 Water to Water Source Heat Pumps Page 5 of 44
Installation
Pre-Installation and Code Requirements
After removing the unit from the carton, immediately remove
the panels and inspect for any damage that might have occurred
during shipment. Report concealed damage immediately to the
transportation company and request inspection.
The electric power source must be the same voltage and
phase as shown on the serial plate. Line and low voltage wiring must be done in accordance with local codes or the national
electric code.
Make a survey of the nal location for the unit before setting
it in place. The unit should be centrally located with respect to
the distribution system. Install the unit within a heated area.
Exposure to inclement weather conditions may cause freeze
damage that is not covered by the warranty.
Table 2: Capacity data
Model Heating (Btuh) Cooling (Btuh)
036 48,200 34,300
048 58,200 42,100
060 67,200 46,000
072 85,500 62,200
120 129,000 94,500
150 170,400 122,140
180 237,000 157,000
240 290,900 202,400
300 339,720 221,800
360 416,900 284,700
420 493,200 358,600
Notes: At standard rating conditions of:
Heating - 100°F entering load water, 70°F entering source water.
Cooling - 55°F entering load water, 85°F entering source water.
If water hammer should occur during start-up or shut down,
slow closing diaphragm type solenoid valves should be used.
Placing the solenoid valve on the outlet side of the system helps
relieve this situation. Due to high pressure drop or poor throttling characteristics, globe and gate valves should not be used,
all ow valves should be ball type.
Domestic Hot Water Heat Recovery
The unit may have an optional factory installed waste heat
recovery feature. The heat recovery device is factory piped to
the refrigerant circuit of the unit. The plumbing to the water
tank and the power to the recovery pump are to be completed
in the eld as required.
Care should be exercised in plumbing water lines to and
from the water heater.
Note: It is important that both water lines be insulated. For
run less than 50 feet one way, use 1/2" O.D. water
lines on models sizes 036 thru 072. A run over 50 feet
should be avoided. On models 120 thru 420 specic
system data must be matched to industry standard
pipe sizing charts.
To make a connection to Hot Water Heat Recovery:
1. Turn off power or gas valves to the water heater.
2. Turn off water supply to the water heater.
3. Open hot water faucet and drain tank.
4. Connect tubing to “Heat Recovery Water Out” on the unit
and extend this line to the hot water heater. Attach to hot
water heater with ttings.
CAUTION
Improper water ow in the system due to piping, valving
or improper pump operating will void the warranty.
Mounting the Unit
The unit should be mounted level on a vibration absorbing
pad slightly larger than the base to provide isolation between
the unit and the oor. It is not necessary to anchor the unit to
the oor.
The electrical connections are accessible from the front. The
compressor can be accessed from either side. A minimum of 24"
clearance in front and sides of the unit should be provided to
allow sufcient room to make water and electrical connections.
If the unit is located in a conned space such as a closet, provisions must be made for unit servicing. Unit sizes 036 thru 072
may be stacked vertically (2 high) in tight mechanical rooms.
Piping the Unit
Both source and load connections must be at least as large
as the connections on the unit. The unit may be furnished with
either copper or optional cupronickel coil on either source or
load coaxial heat exchanger. Cupronickel should always be used
when chlorinated water or ground water which is high in mineral content is the load or source load uid. Never use exible
hoses that are smaller (inside diameter) than that of the water
connection on the unit. Make sure hoses and pipes are suitable
for system water pressure and sized for proper ow rate.
The supply and the discharge pipes should be insulated to
prevent condensation damage caused by low water temperature
in the pipes.
5. Connect tubing to “Heat Recovery Water In” on the unit
and extend this line to the water heater. Attach to cold water
supply. Place pump in this line.
6. Set water heater thermostat as follows:
Electric, Double element - Upper 125°F, Lower
minimum Gas, Oil or Single element - 125°F
7. Wire according to single phase diagram (on page 14) and
three phase diagram (on page 18 and on page 22).
8. The piping and wiring are now complete. Turn on water
supply to water heater. With an open hot water faucet, allow tank to ll. Bleed air from water lines. Check for water
leaks. Do not restore power to water heater until after you
have veried that the heat recovery unit is working and you
have hot water circulating back to the water heater. Restore
power to the water heater.
9. On start up of the unit, make the following operation checks:
■ Pump runs only when the compressor is on. Pump is
turned on by thermostat on compressor discharge
line.
■ All air is purged from water lines.
■ Verify water circulation to and from water heater.
Page 6 of 44 Water to Water Source Heat Pumps IM 1072-1
Applications
Cooling Tower/ Boiler Application Closed Loop
Cooling Tower and Boiler Loop System temperature is
usually maintained between 55°F and 90°F. In the cooling
mode, heat is rejected from the unit into the source water loop.
To reject excess heat from the water loop, the use of a closed
circuit evaporative cooler or an open type cooling tower with
a secondary heat exchanger between the tower and the water
loop is recommended. When utilizing open cooling towers
chemical water treatment is mandatory so that the water is free
from corrosive minerals. It is imperative that all air be removed
from the source closed loop side of the heat exchanger to protect
against fouling.
In the heating mode, heat is absorbed from the source water
loop. A boiler can be utilized to maintain the loop at the desired
temperature. In milder climates a “ooded tower” concept is
often used. This concept involves adding makeup water to the
cooling tower sump to maintain the desired loop temperature.
When making water connections to unit sizes 036 thru 072,
a Teon taped thread sealant is recommended to minimize fouling of the pipes. Sweat connections are used for unit sizes 120
thru 420. The water lines should be routed so as not to interfere
with access to the unit. The use of short lengths on high pressure
hose with a swivel type tting may simplify the connections and
prevent vibration transmission to the building.
Before nal connection to the unit, the supply and return hose
kits must be connected together and the system ushed to remove
dirt, piping chips and foreign material. Ball valves should be
installed in the supply and return lines for unit isolation and unit
water ow rate balancing. The return valve can be adjusted to
obtain the proper ow rate whenever the unit heats or cools.
CAUTION
Water piping exposed to outside may freeze.
Pressure/temperature ports recommended both supply and
return lines adjacent to the unit for system ow balancing. Flow
can be accurately set by measuring the refrigerant-to-water heat
exchangers water side pressure drop.
Well Water Application Open Loop
Water pressure must be maintained in the heat exchanger by
placing water control valves at the outlet of the unit. A bladder
type expansion tank may be used to maintain pressure on the
system. Pressure/temperature ports should be used to set ow
rates by checking pressure drop across the heat exchanger. Avoid
using low voltage (24 volt) solenoids, using them may overload
the unit transformer or interfere with the lockout impedance
circuit. Line voltage solenoids across the load side of compressor contactor are recommended. Normally residential systems
require about 2-gpm of ow rate per ton of cooling capacity is
needed in open loop systems.
Discharge water from a heat pump is not contaminated in
any manner and can be disposed of in various ways depending
on local building codes.
Disposal methods may be by recharge well, storm sewer,
drain eld, adjacent stream or pond. Most local codes forbid the
use of sanitary sewer for disposal. Consult the local building
and zoning department to determine compliance in your area.
Earth Coupled Application Closed Loop
Earth coupled closed loop systems should follow the same
International Ground Source Heat Pump Association guidelines
used for closed loop heat pump applications. Once piping is
completed between the loop pump kit and the earth loop, nal
purging and charging of the loop is required. A ush/purge
assembly capable of obtaining a velocity of 2 fps throughout
the entire system is required. Usually a pump of at least 1.5 hp
will be adequate to purge air and dirt particles from the loop
itself for most residential systems. Commercial systems must
be sized carefully using pump manufacturer pump curves and
system specic data. Flush the system adequately to remove as
much air as possible then pressurize the loop to a static pressure
of 20 to 30 psi. This is normally adequate for proper system
operation. Check for proper ow through the unit by checking
pressure drop across the heat exchanger and compare it to the
cooling and heating operating pressure tables on page 12. In
order to achieve proper cooling capacity in a earth coupled close
loop application, a rate of 3 gpm per ton is required. Antifreeze
solutions are required when low evaporating conditions are
anticipated. Always use pressure/temperature ports to provide
proper uid ow rates.
Typical Load Side Applications
There are many load side applications for which the uid to
uid liquid chiller heat pumps can be used. The most popular
used would include: Hydronic baseboard heating, hydronic inslab oor heating, forced air fan coil heating or cooling, ice and
snow removal, heating potable water, heating swimming pools
and spas, and process uid heating and cooling. When specifying load side heat transfer surface it is important to consider the
heat pump output capacities and uid ow rates. Insufcient
load side heat transfer surface may cause unstable heat pump
operating. Pressure/temperature ports should always be used
to determine load side ow rates. Avoid contact of dissimilar
metals in the load side piping system.
The units can provide heating or cooling for pools and spas
without the use of a secondary heat exchanger. This application
would however require a cupronickel load side heat exchanger.
Automatic chemical feeders must never be installed upstream of
the heat pump. An external bypass should be installed to avoid
over owing the heat exchanger which could cause erosion.
Proper pool PH levels and chemical balances must be maintained
to avoid possible heat exchanger damage.
IM 1072-1 Water to Water Source Heat Pumps Page 7 of 44
Start Up
Check the following before powering the unit.
• Avoid starting any electrical equipment for the rst time
alone, always have another person a safe distance from
the unit that can turn off the main power in the event of
an accident.
• High voltage supply matches the nameplate rating.
• Field wire size, breakers and fuses are the correct size.
• Low voltage control circuit is correct.
• Water piping is complete and correct.
• Closed loop system is ushed and purged.
• Isolation valves are open.
• Loop pumps are correctly wired.
• Access panels are in place and secured.
• Thermostat is in “off” position.
Electric Shock Hazard.
Turn Off All Power
Before Servicing.
Check, Test and Start (See Form on page 40)
1. Set thermostat to highest position.
2. Set thermostat switch to “cool”. Compressor should not
operate. The source water pump should energize.
3. Slowly lower the thermostat setting until the compressor is
energized. Regulate the water ow utilizing the P/T plugs
and compare to the performance tables.
4. Check the cooling refrigerant pressures against valves with
the tables .
5. Turn thermostat switch to the “off” position. The unit will
stop running and the reversing valve should de-energize.
6. Leave unit “off” for approximately ve minutes to allow
pressure to equalize.
7. Adjust thermostat to lowest setting.
8. Set thermostat switch to “heat” position.
9. Slowly adjust thermostat to higher temperature until compressor energizes.
10. Compare the heating refrigerant pressure with valves with
the tables .
11. Check for vibrations, noise, water leaks, etc.
12. Adjust thermostat to correct mode and set to maintain
desired temperature.
13. Instruct the equipment owner/operator of correct thermostat
and system operation.
14. Be certain to complete and forward the warranty papers to
Daikin .
Maintenance Procedures
Proper maintenance is important to provide the most efcient
operation and longest life for your equipment. The following
points are to serve as a general guide. Always consult with your
maintenance contractor with regard to the specic requirements
of your own installation.
Paint Finish
The electrodeposition paint nish may be polished if desired. Spray paint is available in case of accidental scratching
or chipping.
The following should be checked only by a competent
contractor.
Contactor Points
Check contactor points twice a year to see that they are not
burned or pitted as a result of low voltage, lightning strikes, or
other electrical difculties.
Water System
The water circulating pump should be checked and cleaned,
so that it is operating normally. Clogged coils lead to high head
pressures and inefcient operation. If coil is limed, a cleaning
treatment may be necessary. Water coils should be checked
yearly for liming or clogging.
Improper Unit Functioning
If unit is not performing properly, several readings of tem-
perature, pressure and electrical characteristics need to be taken.
The normal required troubleshooting information is listed on the
Check, Test and Start Form on page 40.
Notes: DO NOT place refrigeration gauges on system for
Check, Test and Start procedure. (To be used for
major service only.) To Installer: Fill out Check, Test
and Start Form on page 40 and leave copy with the
customer.
Page 8 of 44 Water to Water Source Heat Pumps IM 1072-1
WRA, WCA, WHA – Size 036-072
Dimensional Data
Dimensions - Size 036
Dimensions (in.) Pipe Size (FPT) Connection Size
A B C D E F G H J K L M N P Control Electric
28⅛ 28⅛ 19 1¾ 6⅜ 95/162 11⅞ 17⅛ 4 1½ 14⅞ 10⅝ 8⅝ 1/2" KO 3/4" KO 1/2" KO 3/4" FPT 1/2" FPT
Dimensions - Size 048–060
Dimensions (in.) Pipe Size (FPT) Connection Size
A B C D E F G H J K L M N P Control Electric
28⅛ 28⅛ 21 2¼ 7½ 3⅞ 2 13¾ 19 4 1½ 14⅞ 10⅝ 8⅝ 1/2" KO 3/4" KO 1/2" KO 1" FPT 1/2" FPT
Dimensions - Size 072
Dimensions (in.) Pipe Size (FPT) Connection Size
A B C D E F G H J K L M N P Control Electric
28⅛ 28⅛ 21 911/1610⅝ 95/162 11½ 19 4 1½ 14⅞ 10⅝ 8⅝ 1/2" KO 3/4" KO 1/2" KO 1" FPT 1/2" FPT
IM 1072-1 Water to Water Source Heat Pumps Page 9 of 44
Auxiliary
Electric
Auxiliary
Electric
Auxiliary
Electric
Load
Source
Load
Source
Load
Source
Domestic
Hot Water
Domestic
Hot Water
Domestic
Hot Water
Dimensional Data
WRA, WCA, WHA – Size 120-180
Dimensions - Size 120 – 150
A B C D E F G H K L M N P Q R S Load Source FPT
26¼ 19½ 12¼ 4½ 8⅜ 22¼ 4⅜ 18¾ 41 22⅛ 34 1 113/
Dimensions - Size 180
A B C D E F G H K L M N P Q R S Load Source FPT
26¼ 19½ 12¼ 4½ 8⅜ 22¼ 4⅜ 18¾ 41 22⅛ 34 1 113/
Page 10 of 44 Water to Water Source Heat Pumps IM 1072-1
Dimensions (in.) Water Connection Size
37 29¾ 42 1½"
16
Dimensions (in.) Water Connection Size
37 29¾ 42 2"
16
WRA, WCA, WHA – Size 240-420
Dimensional Data
Dimensions - Size 240 – 420
A B C D E F K L M N P Q R S Load Source FPT
31 20⅞ 16½ 4⅞ 22½ 27½ 63⅛ 22⅛ 34 1 113/1652⅛ 44⅛ 50 2"
IM 1072-1 Water to Water Source Heat Pumps Page 11 of 44
Dimensions (in.) Water Connection Size
Engineering Data
Physical Data
Table 3: WRA, WHA, WCA 036 – 420
Unit Size
036 28.125 28.125 19.00 250 259 2.80 0.75
048 28.125 28.125 21.00 297 300 3.50 1.00
060 28.125 28.125 21.00 302 505 4.40 1.00
072 35.125 28.125 21.00 320 370 5.00 1.00
120 34.00 42.00 41.00 570 610 2.75/2.75 1.50
150 34.00 42.00 41.00 735 770 4.25/4.25 1.50
180 34.00 42.00 41.00 900 950 8.00/8.00 2.00
240 34.00 50.00 63.125 1040 1140 10.0/10.0 2.00
300 34.00 50.00 63.125 1130 1230 16.0/16.0 2.00
360 34.00 50.00 63.125 1420 1540 17.5/17.5 2.00
420 34.00 50.00 63.125 1620 1750 20.0/20.0 2.00
Cabinet Dimensions (in.) Unit Weight (lb.)
Width Depth Height Operating Shipping FPT
Factory Refrigerant
Charge Per Cicuit (lb.)
Operating Pressures (PSIG)
Cooling Mode
Table 4: Models WRA and WCA
Entering Source Temperature °F
Leaving Load °F
Suction Discharge Suction Discharge Suction Discharge
45 90-109 210-250 95-110 270-310 98-115 355-395
50 97-114 215-255 100-115 280-315 105-123 365-410
55 106-123 220-265 110-125 285-320 118-135 385-420
50 70 90
Water Connections (in.)
Heating Mode
Table 5: Models WRA and WHA
Entering
Load °F
Suction Discharge Suction Discharge Suction Discharge Suction Discharge
80 63-87 275-318 85-110 295-332 115-138 325-365 138-162 365-400
100 66-90 375-410 90-114 398-435 120-143 420-455 145-170 445-490
120 66-90 503-542 92-115 515-556 123-145 530-570 153-175 555-600
30 50 70 90
Entering Source Temperature °F
Page 12 of 44 Water to Water Source Heat Pumps IM 1072-1
Engineering Data
Antifreeze Correction
Antifreeze
Type Percent 90°F EWT 30°F EWT 45°F EWT 90°F EWT 30°F EWT
Water 0 1.000 1.000 1.000 1.000 1.000
10 0.991 0.973 0.975 0.991 1.075
20 0.979 0.943 0.946 0.979 1.163
Ethylene Glycol
Propylene Glycol
Methanol
Ethanol
30 0.965 0.917 0.920 0.965 1.225
40 0.955 0.890 0.895 0.955 1.324
50 0.943 0.865 0.870 0.943 1.419
10 0.981 0.958 0.959 0.981 1.130
20 0.969 0.913 0.919 0.969 1.270
30 0.950 0.854 0.866 0.950 1.433
40 0.937 0.813 0.829 0.937 1.614
50 0.922 0.770 0.789 0.922 1.816
10 0.986 0.957 0.961 0.986 1.127
20 0.970 0.924 0.928 0.970 1.197
30 0.951 0.895 0.897 0.951 1.235
40 0.936 0.863 0.865 0.936 1.323
50 0.920 0.833 0.835 0.920 1.399
10 0.991 0.927 0.941 0.991 1.242
20 0.972 0.887 0.901 0.972 1.343
30 0.947 0.856 0.866 0.947 1.383
40 0.930 0.815 0.826 0.930 1.523
50 0.911 0.779 0.791 0.911 1.639
Heating Capacity Cooling Capacity
Load Source Load Source
Pessure Drop
= Operation in the shaded areas should be avoided as antifreeze solutions greater than 35% will result in extreme
perrformance reductions.
Waterow Correction
Flow Heating Cooling
GPM/Ton Tons kW Tons kW
1.2 0.982 1.040 0.970 1.044
Load
Source
1.8 0.990 1.022 0.983 1.024
2.4 1.000 1.000 1.000 1.000
1.5 0.973 1.042 0.984 1.038
2.3 0.987 1.021 0.993 1.019
3.0 1.000 1.000 1.000 1.000
IM 1072-1 Water to Water Source Heat Pumps Page 13 of 44
Wiring Diagram
208-230/60/1, Unit Sizes 036, 048, 060 and 072
Note: See wiring diagram legend on page 15.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
REMOTE SWITCH
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
L2
1
L1
GR
COMPRESSOR WIRE SIZE TABLE
*
UNIT
MODEL
EGL
WIRE SIZE (AWG)
036 12
048 12
060 10
072 8
8
HEAT
OFF
COOL
HEAT
OFF
COOL
TS-H
9
TS-C
(WHEN USED)
18
16
TB2
TB1
TB1
TB1
TB1
TB1
A1
A2
CC
L2 T2
CC
L1 T1
R-14
BL-14
F2
(WHEN USED)
R
RC
HRPR
4 2
F1
R-14
BK-14
TR
R
R
R
5
8 1
SPLICE
Y
4
PM
Y
SPLICE
(WHEN REQ’D)
11
TC
10
PK
S
JUMPER
(WWR ONLY)
Y
Y
Y
STG1
C
STG2
C
(OPTIONAL)
NO
NO
JUMPER (WWR ONLY)
TB3
13
6
14
HP
BK BL
LP2
FS-L FS-S
(OPTIONAL) (OPTIONAL)
15
LTC
COM1 NO1
(OPTIONAL)
3
Y
CHR
Y
4 2
SPLICE
CC-A
(WHEN REQ’D)
R
7
SENSOR 1 SENSOR 2
R
TB3
BRBR
O
7
O
PR
PK
BK
LP1
BL
Y
CC
Y
W
W
R
PR
BK
O
BR
BL
C
G-14
R R
(WHEN USED)
BKBK-14
LINE
VOLTAGE
24V
PCT
BK
(WHEN USED)
LTC
24 VAC
SEN 1 SEN 2
(OPTIONAL)
LPS
HPS
T1
T
C
R
X
Y
R-
*
BL-14
BK-
*
WTL
SPLICE when necessary
SPLICE when necessary
75 VA
CLASS 2
50/60 HZ
BK
PR
BK
12
CCM
10 SEC
5 MIN
ASC
P10
P11
P12
Y
LPR-AL1701
LPS BYPASS
180
120
SECONDS
90
P4P3P2
P1
(OPTIONAL)
1
17
CHR
1 3
(WHEN USED)
6
(WHEN USED)
1 3
TC
300
P5
FL
R
IR
TB4
4
TB4
5
R-14
BK-14
RVS
CL
G
HRPR
(WHEN USED)
24 COM
(OPTIONAL)
ON = Y SIGNAL PRESENT
1 BLINK = FAUL
2 BLINKS = FAULT ON LPS TERMINALS
LED:
OFF = NO Y SIGNAL PRESENT
T ON HPS TERMINALS
P7P8P9
3 SEC
6 SEC
DOM
BR
3
BR
R-14
BK-14
SPLICE
BL
BK
BR
BR
BR
R
SPLICE
(WHEN REQ’D)
2
T3
T2
T1
T2
T1
BR
SPLICE
CM
WHR
(OPTIONAL)
4 (L2)
3 (L1)
CCH
BR
SPLICE
(WHEN REQ’D)
GR
PM
(OPTIONAL)
G
4
1,3,17
46
15
WIRING DIAGRAM # 0962I-2631B, REV.B
PR
PR
IR
4 2
WW* 036, 048, 060, 072
SINGLE PHASE
Page 14 of 44 Water to Water Source Heat Pumps IM 1072-1
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