Johnson Controls RW Series Owner's manual

MODEL RW
10 TON - 50 TON
60 HZ
VINTAGE D
Issue Date:
December 3, 2019
COMMERCIAL REVERSIBLE CHILLER
RW SERIES
INSTALLATION, OPERATION, MAINTENANCE Supersedes: 146.06-NOM1 (614) Form 146.06-NOM1 (1219)

This equipment is a relatively complicated apparatus.
During rigging, installation, operation, maintenance,
or service, individuals may be exposed to certain com-
ponents or conditions including, but not limited to:
heavy objects, refrigerants, materials under pressure,
rotating components, and both high and low voltage.
Each of these items has the potential, if misused or
handled improperly, to cause bodily injury or death. It
is the obligation and responsibility of rigging, instal-
lation, and operating/service personnel to identify and
recognize these inherent hazards, protect themselves,
and proceed safely in completing their tasks. Failure
to comply with any of these requirements could result
in serious damage to the equipment and the property in
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
which it is situated, as well as severe personal injury or
death to themselves and people at the site.
This document is intended for use by owner-authorized
rigging, installation, and operating/service personnel. It
is expected that these individuals possess independent
training that will enable them to perform their assigned
tasks properly and safely. It is essential that, prior to
performing any task on this equipment, this individual
shall have read and understood the on-product labels,
this document and any referenced materials. This in-
dividual shall also be familiar with and comply with
all applicable industry and governmental standards and
regulations pertaining to the task in question.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to specific situations:
Indicates a possible hazardous situation
which will result in death or serious injury
if proper care is not taken.
Indicates a potentially hazardous situa-
tion which will result in possible injuries
or damage to equipment if proper care is
not taken.
Identies a hazard which could lead to
damage to the machine, damage to other
equipment and/or environmental pollu-
tion if proper care is not taken or instruc-
tions and are not followed.
Highlights additional information useful
to the technician in completing the work
being performed properly.
External wiring, unless specied as an optional connection in the manufacturer’s product line, is not
to be connected inside the control cabinet. Devices such as relays, switches, transducers and controls
and any external wiring must not be installed inside the micro panel. All wiring must be in accor-
dance with Johnson Controls’ published specications and must be performed only by a qualied
electrician. Johnson Controls will NOT be responsible for damage/problems resulting from improper
connections to the controls or application of improper control signals. Failure to follow this warn-
ing will void the manufacturer’s warranty and cause serious damage to property or personal injury.

RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Table of Contents
Model Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Field Connected Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
Typical Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
System Cleaning and Flushing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-18
Field Wiring and Control Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20
Control Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-22
Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Inputs and Outputs Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Networking Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Unit Display and Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25-26
Reference Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Unit Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Compressor / Thermistor Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Heating and Cooling Cycle Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Troubleshooting Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-36
Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Replacement Fuse Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-40
Revision Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Model Nomenclature
Voltage Availability
Voltage Model
120 180 240 360 600
208-230/60/3 ••••
NA
460/60/3 •• •• •• • •
575/60/3 •••••
380/60/3 •• NA NA ••
03/05/14
Legend:
NA = Not Available
•= Voltage available in this size
•• = Voltage and soft start available in this size
RWXW 120 R 3 A E 8 N N
1-4 5-7 8 9 12 13 14
Model
RWXW –RW Series
Reversible Chiller
Unit Capacity (MBTUH)
120, 180, 240, 360, 600
Operation
R - Reversible
Voltage
3–208-230/60/3
4–460/60/3
5–575/60/3
8–380/60/3
Phase Protection
A–Non-Fused Disconnect, Phase Guard
B–Non-Fused Disconnect, IntelliStart®
C–Fused Disconnect, Phase Guard
D–Fused Disconnect, IntelliStart
Chassis
E–Enclosed
P–Enclosed with Pressure Gauges
Vintage
D* - Factory Use Only
Non-Standard Options
SS - Standard
Future Option
N–Future Use
Future Option
N–Future Use
Controls
8–FX10 without Communication,
with User Interface
9–FX10 with Open N2 Communication
Card with User Interface
0–FX10 with Lonworks Communication
Card with User Interface
3–FX10 with BacNet Communication
Card with User Interface
Rev.: 14 February 2014D
SS
15-16
D
17
10 11
Notes:
See electrical availability table for detailed offering by voltage

5
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Safety Considerations
Installing and servicing air conditioning and heating equipment can
be hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install, repair
or service heating and air conditioning equipment. When working
on heating and air conditioning equipment, observe precautions in
the literature, tags and labels attached to the unit and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have fire extinguisher
available for all brazing operations.
NOTE: Before installing, check voltage of unit(s) to ensure
proper voltage.
WARNING: Before performing service or
maintenance operations on the system, turn off main
power switches to the unit. Electrical shock could
cause serious personal injury.
Application
Units are not intended for heating domestic (potable water) by
direct coupling. If used for this type of application, a secondary
heat exchanger must be used.
Moving and Storage
Move units in the normal “Up” orientation as indicated by the labels
on the unit packaging. When the equipment is received, all items
should be carefully checked against the bill of lading to ensure
that all crates and cartons have been received in good condition.
Examine units for shipping damage, removing unit packaging if
necessary to properly inspect unit. Units in question should also be
internally inspected. If any damage is observed, the carrier should
make the proper notation on delivery receipt acknowledging the
damage. Units are to be stored in a location that provides adequate
protection from dirt, debris and moisture.
WARNING: To avoid equipment damage, do not leave
the system filled in a building without heat during
cold weather, unless adequate freeze protection
levels of antifreeze are used. Heat exchangers do not
fully drain and will freeze unless protected, causing
permanent damage.
General Installation Information
Unit Location
Provide sufficient room to make water and electrical connections.
If the unit is located in a confined space, provisions must be made
for unit servicing. Locate the unit in an indoor area that allows easy
removal of the access panels and has enough space for service
personnel to perform maintenance or repair. These units are not
approved for outdoor installation and, therefore, must be installed
inside the structure being conditioned. Do not locate units in areas
subject to freezing conditions.
WARNING: Do not store or install units in corrosive
environments or in locations subject to temperature
or humidity extremes (e.g. attics, garages, rooftops,
etc.). Corrosive conditions and high temperature
or humidity can significantly reduce performance,
reliability, and service life.
WARNING: To avoid equipment damage and possible
voiding of warranty, be sure that properly sized
strainers are installed upstream of both brazed plate
heat exchangers to protect them against particles in
the fluid.

6
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Mounting Units
Remove the unit from the wooden shipping skids (see physical dimensions). Units will be shipped with heavy duty rubber grommets to
reduce sound that can be transmitted through the floor via the frame (see isolator drawing). For additional sound attenuation, use heavy
duty spring isolation that can reduce sound levels by 3 dBA (see springs drawing).
Unpacking the Unit
Remove the stretch warp and protective cardboard from the unit. Where applicable, remove the compressor shipping brackets located at
the base of each compressor. To do so, lift up the bottom of the compressor sound jacket and remove the two bolts that hold the bracket .
General Installation Information cont.
Rubber Isolators RD2 RD3
Part
Number Type Color Code Max Load, lbs Deflection, in Qty
99S502-01 RD2 Green 380 0.50 4
• Compatible with RW120-180
Part
Number Type Color Code Max Load, lbs Deflection, in Qty
99S502-02 RD3 Green 750 0.50 4
• Compatible with RW240-600
Number Compatible With Spring
Color Rated Capacity Rated Deflection Isolator Constant Adjustment Bolt Qty
IS-325-01 RW120-180 Brown 325 lbs 1.23" 264 lbs/in 1/2 x 3.5 4
IS-750-01 RW240-600 Orange 750 lbs 1.06" 707 lbs/in 1/2 x 3.5 4
Spring Isolators

7
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Physical Dimensions
"A"
"B"
"H"
"D"
"E"
"F"
"G"
"C"
SOURCE
WATER OUT
SOURCE
WATER IN
LOAD
WATER IN
LOAD
WATER OUT
7.00
4.50 4.00
4.50
7.50
ELECTRICAL
HIGH VOLTAGE
ELECTRICAL
LOW VOLTAGE
J
2.40
TO PORT
(SERVICE)
REARSIDE
FRONT
TOP
SOURCE
WATER OUT
SOURCE
WATER IN
LOAD
WATER IN
LOAD
WATER OUT
CONTROL BOX COVER
MAIN POWER CONNECTION
VIBRATION PADS
ACCESS DOOR
DISCONNECT SWITCH
EMERGENCY STOP SWITCH
FX-10
CONTROLLER
DISPLAY
NOTES:
1. DO NOT SCALE DRAWING.
SIDE ACCESS
PANEL DOORS
SERVICE PORTS
Model A B C D E F G H J
120-180 57.3
[1455] 24.1 [612] 42.5 [1080] 5.0 [127] 17.0 [432] 8.8 [224] 17.0 [432] 11.9 [302] 4.6 [117]
240-360 64.2
[1631] 24.1 [612] 50.5 [1283] 6.9 [175] 17.0 [432] 13.9 [353] 17.0 [432] 12.1 [307] 3.6 [91]
600 71.1
[1806] 24.0 [610] 58.5 [1486] 6.5 [165] 17.0 [432] 19.5 [495] 17.0 [432] 15.0 [381] 3.2 [81]
All dimensions in inches, [mm] 5/12/14

8
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
K
L
N
M
P
R
A
DETAIL A
S
25.00
24.00
52.00
24.00
SHADED AREAS REPRESENT REQUIRED CLEARANCE
FOR SERVICE & MAINTENANCE OF EQUIPMENT.
T
T
Physical Dimensions, cont.
Model K L M N P R S T*
120-180 57.0
[1448] 42.0 [1067] 63.1 [1603] 15.9 [404] 19.5 [495] 9.7 [246] 1.3 [33] 2.0 [50.8]
240-360 65.0
[1651] 42.0 [1067] 69.9 [1775] 19.9 [505] 19.5 [495] 9.7 [246] 1.8 [46] 2.0 [50.8]
600 70.0
[1778] 42.0 [1067] 76.8 [1951] 22.0 [559] 19.5 [495] 12.7 [323] 1.8 [46] 2.5 [63.5]
All dimensions in inches, [mm]
*T - Units shipped with groove pipe connection 5/12/14

9
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Physical Data
Model Compressor Refrigerant
Charge*
Total Weight
Shipping Installed
120 Scroll (2) 5.3 720 710
[2.4] [327] [323]
180 Scroll (2) 7.8 838 844
[3.5] [381] [384]
240 Scroll (2) 10.5 1130 1152
[4.8] [514] [524]
360 Scroll (2) 17.9 1320 1388
[8.1] [600] [631]
600 Scroll (2) 27.3 1748 1850
[12.4] [795] [841]
Weights shown in Pounds, [kg] 1/30/2014
* Refrigerant per circuit in Pounds, [kg]
Add 32 lbs [15 kg] for fluid weight when full. (120)
Add 48 lbs [22 kg] for fluid weight when full. (180)
Add 64 lbs [29 kg] for fluid weight when full. (240)
Add 110 lbs [50 kg] for fluid weight when full. (360)
Add 144 lbs [65 kg] for fluid weight when full. (600)
NOTE: See page 12 for minimum fluid volume guidelines.

10
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
General
System piping should be kept as simple as possible to minimize
the pressure drop, but hand valves should be field installed to
facilitate unit servicing. The piping installation should provide
service personnel with the ability to measure and/or monitor water
temperatures and pressures.
Source and load fluid connections are provided with 2-inch
[50.8mm] Victaulic grooved nipples (see Figure 4). Each nipple will
also have a PT port installed for test and balance purposes. It will
be the installing contractor’s responsibility to adequately support
incoming piping to avoid damage to the unit’s piping or heat
exchangers. The water lines should be routed so as not to interfere
with access to the unit.
For any installation where the transmission of vibration through
the piping connections could cause unacceptable noise levels
in occupied spaces it is important to provide adequate vibration
damping. One method is to use the optional Adapter Hose Kit (kit
number TKC16S-4). This Kit consists of four pieces of a braided
stainless steel flexible hose with a 2” Victaulic connection on one
end and a 2” MPT connection with pipe union on the other. Overall
length of each piece is 18”.
NOTE: Units are factory run-tested using propylene glycol. Prior to
connecting piping to unit, thoroughly flush heat exchangers.
Before final connection to the unit, the supply and return hose
kits must be connected to each other, bypassing the unit, and
the system flushed to remove dirt, piping chips and other foreign
material. Normally, a combination balancing and close-off (ball)
valve is installed at the return, and a rated gate or ball valve is
installed at the supply. The return valve can be adjusted to obtain
the proper water flow. The valves allow the unit to be removed
for servicing.
The proper water flow must be delivered to each unit whenever the
unit heats or cools. The proper flow rate cannot be accurately set
without measuring the water pressure drop through the refrigerant-
to-water heat exchanger. A 3 GPM flow rate per ton [0.054 LPS
per kW] of cooling capacity (2.25 GPM per ton [0.0404 LPS per
kW] minimum) is required.
Field Connected Water Piping
CAUTION: Remove the plastic protective caps in the ends of each of the four water pipes on the heat exchangers
prior to piping connection. Failure to remove the caps will result in serious damage and could void the warranty.
NOTE: The placement and connection of the water circulating
pump(s) must be taken into consideration prior to designing the
final water piping systems.
Closed Loop Tower/Boiler Systems
The water loop is usually maintained between 60°F [15.5°C] and
90°F [32.2°C] for proper heating and cooling operation. This is
accomplished with a cooling tower and a boiler.
To reject excess heat from the condenser 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 condenser
water loop is recommended. If an open type cooling tower is
used without a secondary heat exchanger, continuous chemical
treatment and filtering of the water must be performed to ensure
the water is free from damaging materials.
CAUTION: Water piping exposed to outside
temperature may be subject to freezing.
Open Loop Well Water Systems
Installation of an open loop system is not recommended without
using a secondary heat exchanger unless water quality guidelines
are met.
Earth Coupled Systems
All supply and return water piping should be insulated to
prevent excess condensation from forming on the water lines.
Ensure pumping system is capable of providing adequate flow
rate at the system pressure drop, 3.0 GPM per ton [0.054 LPS
per kW] (source side) is recommended. Antifreeze in the loop
is strongly recommended.

11
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
RW Series Typical Piping
FS
Brazed Plate
Heat Exchanger
Isolation Valves
Isolation Valve
Strainer
Pump
From Load
To Load
Water
Temperature
Sensors
Field Supplied and InstalledFactory Installed
1/4” NPT
Pressure/Temperature
Port
Pressure Actuated
Water Valve Compressor
Discharge
Pressure
FS
Brazed Plate
Heat Exchanger
Isolation Valves
Isolation Valve
Strainer
Pump
From Load
To Load
Water
Temperature
Sensors
Field Supplied and InstalledFactory Installed
1/4” NPT
Pressure/Temperature
Port
Standard Piping
Pressure Regulated Piping
Note: System piping should have drain ports to enable flushing and cleaning of heat exchangers. On systems utilizing pumps with
VFDs, an automatic flow control valve must be installed.
Note: System piping should have drain ports to enable flushing and cleaning of heat exchangers. On systems utilizing pumps with
VFDs, an automatic flow control valve must be installed.

12
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
RW Series Application Data
1.0. Minimum Fluid Volume
A. Water-to-water heat pumps require a minimum amount of load
side fluid volume to ensure accurate and stable temperatures
during system operation. For normal air conditioning type
applications, it is recommended to use at least 7 gallons/ton.
B.
Applications that require more precise temperature control or
low loading will occur the minimum fluid volume shall be no
less than 10 gallons/ton. Installation of a buffer tank that will
properly mix the fluid is recommended.
1.1. Water-to-Water Heat Pump Sizing
A. Heat pumps should be adequately sized for optimal
system efficiency and run time. Oversizing by more than
15% can diminish performance resulting in higher power
consumption, short cycling of compressors, and unstable
conditioning temperatures.
B. In applications where the minimum load is significantly less
than the design condition, it is better to install 2 smaller heat
pumps for load matching rather than a single large heat pump.
1.2. Heat Pump Piping
A. Multiple heat pumps can be installed in series or parallel
configurations. The preferred system design is to pipe the
equipment in parallel due to its simplicity and flexibility. In
parallel systems, the heat pump equipment can vary in size
as long as flow rate and system volume are accounted for.
B. Piping equipment in series is not desired; however, it can
be done if proper guidelines are followed. Always observe
proper temperature and flow rate requirements for each
unit. Sometimes this method is desired to achieve larger
temperature differences.
1.3. Strainers
A. All brazed-plate heat exchangers shall have a strainer within
8 ft of the water/brine inlet. It is highly recommended to use a
minimum of 60 mesh in order to provide maximum filtration.
In any case, the strainers should never have a mesh size less
than 20.
B. Failure to install proper stainers and perform regular service
can result in serious damage to the unit, and cause degraded
performance, reduced operating life and failed compressors.
Improper installation of the unit (which includes not having
proper strainers to protect the heat exchangers) can also
result in voiding the warranty.
C. Strainers should be selected on the basis of acceptable
pressure drop, and not on pipe diameter. The strainers
selected should have a pressure drop at the nominal flow rate
of the units; low enough to be within the pumping capacity of
the pump being used.
1.4. Flow Sensing Devices
A. A flow switch or equivalent must be installed on the
evaporator for each unit to be installed. If the unit is to operate
as both modes (heating/cooling), a flow switch is needed on
both heat exchangers.
B. A differential pressure switch can be used in place of a flow
switch. The differential switch must be capable of pressure
range as indicated in the pressure drop tables.
1.5. Water Quality
A. General: Reversible chiller systems may be successfully
applied in a wide range of commercial and industrial
applications. It is the responsibility of the system designer
and installing contractor to ensure that acceptable water
quality is present and that all applicable codes have been
met in these installations.
B. Water Treatment: Do not use untreated or improperly treated
water. Equipment damage may occur. The use of improperly
treated or untreated water in this equipment may result in
scaling, erosion, corrosion, algae or slime. The services of
a qualified water treatment specialist should be engaged to
determine what treatment, if any, is required. The product
warranty specifically excludes liability for corrosion, erosion or
deterioration of equipment.
The heat exchangers in the units are 316 stainless steel plates
with copper brazing. The water piping in the heat exchanger
is steel. There may be other materials in the building’s piping
system that the designer may need to take into consideration
when deciding the parameters of the water quality.
If an antifreeze or water treatment solution is to be used, the
designer should confirm it does not have a detrimental effect
on the materials in the system.
C. Contaminated Water: In applications where the water quality
cannot be held to prescribed limits, the use of a secondary or
intermediate heat exchanger is recommended to separate the
unit from the contaminated water.
The following table outlines the water quality guidelines for
unit heat exchangers. If these conditions are exceeded, a
secondary heat exchanger is required. Failure to supply a
secondary heat exchanger where needed will result in a
warranty exclusion for primary heat exchanger corrosion
or failure.
WARNING: Must have intermediate heat exchanger
when used in pool applications.

13
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
1.6. Insulation
A. Heat pumps are built with factory installed insulation on any
surface that may be subject to temperatures below the room
dew point.
1.7. Brine Applications
A. Applications where the leaving fluid temperature goes below
40°F a suitable brine solution must be used. Failure to do
so can cause immediate damage to the system. The brine
must be approved for use with heat exchangers. Automotive
antifreeze solutions are not suitable for use in brazed plate
heat exchangers.
B.
The freeze detection must be adjusted appropriately for
brine applications. The brine solution concentration should
be at least 15°F below the lowest leaving fluid temperature.
Water Quality Guidelines
RW Series Application Data cont.
Surface Condensation Chart
Room Ambient Condition Surface Temperature
50°F 35°F 0°F
Normal (Max 85°F, 70% RH) 1/2" 3/4" 1"
Mild (Max 80°F, 50% RH) 1/8" 1/4" 1/2"
Severe (Max 90°F, 80% RH) 3/4" 1" 2"
Material 316 Stainless Steel
pH Acidity/Alkalinity 7 - 9
Scaling Calcium and
Magnesium Carbonate (Total Hardness) less than 350 ppm
Corrosion
Hydrogen Sulfide Less than 1 ppm
Sulfates Less than 200 ppm
Chlorine Less than 0.5 ppm
Chlorides Less than 300 ppm
Carbon Dioxide 10 - 50 ppm
Ammonia Less than 20 ppm
Ammonia Chloride Less than 0.5 ppm
Ammonia Nitrate Less than 0.5 ppm
Ammonia Hydroxide Less than 0.5 ppm
Ammonia Sulfate Less than 0.5 ppm
Total Dissolved Solids (TDS) 1000 - 1500 ppm
LSI Index +0.5 to -0.5
Iron Fouling
(Biological Growth)
Iron, FE 2+ (Ferrous)
Bacterial Iron Potential < 0.2 ppm
Iron Oxide Less than 1 ppm, above this
level deposition will occur
Erosion Suspended Solids Less than 10 ppm and filtered
for max. of 600 micron size
Threshold Velocity
(Fresh Water) < 6 ft/sec
NOTES: Grains = ppm divided by 17
mg/L is equivalent to ppm 2/22/12

14
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
System Cleaning and Flushing
Cleaning and Flushing
Prior to start up of any heat pump, the water circulating system
must be cleaned and flushed of all dirt and debris.
If the system is equipped with water shutoff valves, the supply and
return runouts must be connected together at each unit location
(This will prevent the introduction of dirt into the unit, see Flushing
with Water Shutoff Valve Equipped Systems illustration). The
system should be filled at the water make-up connection with all air
vents open. After filling, vents should be closed.
The contractor should start the main circulator with the pressure
reducing valve makeup open. Vents should be checked in
sequence to bleed off any trapped air and to verify circulation
through all components of the system.
As water circulates through the system, the contractor should
check and repair any leaks found in the piping system. Drain(s) at
the lowest point(s) in the system should be opened for initial flush
and blowdown, making sure water fill valves are set at the same
rate. Check the pressure gauge at the pump suction and manually
adjust the make-up water valve to hold the same positive pressure
both before and after opening the drain valves. Flushing should
continue for at least two hours, or longer if required, until drain
water is clean and clear.
The supplemental heater and/or circulator pump, if used, should
be shut off.All drains and vents should be opened to completely
drain the system. Short-circuited supply and return runouts should
now be connected to the unit supply and return connections.
Refill the system with clean water. Test the system water for acidity
and treat as required to leave the water slightly alkaline (pH 7.5 to
8.5). The specified percentage of antifreeze may also be added
at this time. Use commercial grade antifreeze designed for HVAC
systems only. Environol™ brand antifreeze is recommended.
Once the system has been filled with clean water and antifreeze
(if used), precautions should be taken to protect the system
from dirty water conditions. Dirty water will result in system-wide
degradation of performance, and solids may clog valves, strainers,
flow regulators, etc. Additionally, the heat exchanger may become
clogged which reduces compressor service life and can cause
premature unit failure.
In boiler/tower application, set the loop control panel set points
to desired temperatures. Supply power to all motors and start the
circulating pumps. After full flow has been established through all
components including the heat rejector (regardless of season), air
vented and loop temperatures stabilized, each of the units will be
ready for check, test and start up and for air and water balancing.
Ground Source Loop System Checkout
Once piping is completed between the unit pumping system and
ground loop, final purging and charging of the loop is needed. A
high pressure pump is needed to achieve adequate flow velocity
in the loop to purge air and dirt particles from the loop itself.
Antifreeze solution is used in most areas to prevent freezing. Flush
the system adequately to remove as much air as possible; then
pressurize the loop to a static pressure of 40-50 PSI (summer)
or 50-75 PSI (winter). This is normally adequate for good system
operation. Loop static pressure may decrease soon after initial
installation, due to pipe expansion and loop temperature change.
Running the unit for at least 30 minutes after the system has been
completely purged of air will allow for the “break-in” period. It may
be necessary to adjust static loop pressure (by adding water) after
the unit has run for the first time. Loop static pressure will also
fluctuate with the seasons. Pressures will be higher in the winter
months than during the cooling season. This fluctuation is normal
and should be considered when charging the system initially.
Return Runout
Supply Runout
Mains
Rubber Hose
Runouts Initially
Connected Together
Flushing with Water Shutoff Valve Equipped Systems

15
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Electrical Data
Model Rated
Voltage Voltage Min/Max
Compressor1Total
Unit
FLA
Min
Circ
Amp
Min
Fuse/
HACR
Max
Fuse/
HACR2
MCC RLA LRA
120
208-230/60/3 187/253 36.0 23.1 160.0 46.2 52.0 60.0 70
460/60/3 414/506 19.0 12.2 87.0 24.4 27.5 30.0 35
575/60/3 517/633 13.5 8.7 62.0 17.4 19.6 20.0 25
380/60/3 342/418 19.0 12.2 95.0 24.4 27.5 30.0 35
180
208-230/60/3 187/253 45.0 28.8 235.0 57.6 64.8 70.0 90
460/60/3 414/506 19.0 12.2 110.0 24.4 27.5 30.0 35
575/60/3 517/633 16.5 10.9 95.0 21.8 24.5 25.0 35
240
208-230/60/3 187/253 52.2 35.2 250.0 70.4 79.2 80.0 110
460/60/3 414/506 27.0 19.2 140.0 38.4 43.2 45.0 60
575/60/3 517/633 19.1 14.5 100.0 29.0 32.6 35.0 45
360
208-230/60/3 187/253 75.0 48.1 351.0 96.2 108.2 110.0 150
460/60/3 414/506 38.6 24.7 197.0 49.4 55.6 60.0 80
575/60/3 517/633 35.0 22.4 135.0 44.8 50.4 60.0 70
380/60/3 342/418 51.0 32.7 239.0 65.4 73.6 80.0 100
600
460/60/3 414/506 62.0 39.7 260.0 79.4 89.3 100.0 125
575/60/3 517/633 45.0 28.8 210.0 57.6 64.8 70.0 90
380/60/3 342/418 72.0 46.2 310.0 92.4 104.0 110.0 150
HACR circuit breaker in USA only
1- MCC, RLA, & LRA rating per compressor. Breaker & FLA sized for both compressors.
2- Equipment supplied with Class J fuses per minimum fuse size.
3/5/14
Compressor Protection Module
An electronic protection module is provided with compressors
utilized in model size 600. This module will protect against
phase reversal and phase loss at start-up. Protection is active
for 5 seconds after the first second of compressor operation.
In the event that either phase sequencing or phase loss has
occurred the following blink sequence will display on the
module.

16
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Electrical Data cont.
Figure 6: Control Box Transformer
Fused /
Non-Fused
Disconnect
Power Supply
(Field line voltage
connection) Class CC Fusing
for Transformer
Compressor
Contactor (Lower)
Compressor
Contactor (Upper)
Compressor
Current Sensors
Field Low Voltage
Connections
FX10 Control
Board
FX10 Expansion
Board
Class J Fuses

17
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Wiring Schematics
Chiller with IntelliStart
T1
T2
T3 S1
S2
Earth Ground
Blue
Blue
Page 1
24V
Transformer
SFS
Johnson FX-10
5VDC
AI3
35
36
37
38
+
-
AI5
-
+
AI4
-
+
AI6
AI2
AI1
5VDC
5VDC
LED
- - -
+ + +
24VAC
24VAC Com
GROUND
39 40
41
PWM2 PWM2 Com PWM1
42
43
44
45
46
47 48
24VAC Com DI12 DI11 DI10 DI9 DI8 DI7
49
50 51
52
53 54
55 56
DI 3/4/5/6/ Com DI6 DI5 DI4 DI3 DI2 DI1 9VDC
20
19
18
17
16
15 14
13
12
11
10
9
8
7 6 5
4
3
2
1
D09
D08 D07
D0
6
D05 D04 D03 D02 D01
J8 J2
J10
J9
J7
NOTE 6
A21A12
A25 A22
A32
A31
A35
A23
A13
A11
A15
A14
A24
A34
A33
34
31
30
29
28
27
26
25
24
23
22
21
20
AI4 EXP
5Vdc Com J2
5Vd
c
5Vdc Com
AI3 EXP
5Vd
c
5Vdc Com
AI2 EXP
5Vd
c
5Vdc Com
AI1 EXP
5Vd
c
17
16
15
14
13
12
11
10
DO3
24 Vac
DO4
DO5
DO6
24 Vac
24 Vac Com
J3
24 Vac
J1
Main Board
Connection
A41
A31
A23
A13
A43
A42
A32
A33
A21A22
A12
A11
4
3
2
1
D02
D01
6
D07
5
8
D08
7
Johnson FX10
Expansion Board
Unit Power Supply
PB1
Black (F1)
Black (F2)
Black (F3)
Black (F4)
Black (F5)
Black (F6)
Black (F7)
Black (F8)
Black (F9)
Black (F10)
Black (F11)
Black (F12)
Black (F13) Black (F14)
Black (F15)
Black (F16) Black (F17)
Black (F18)
1 2
3 4
5 7
8 9
10
6
11 12 13
16 15 14
17
20
19 18
A
33 32 31 30 29 28 27 26 25 24 23
White/Red (80) White/Red (81)
White/Blue (33) White/Blue (34)
Yellow/Red (35) Yellow/Red (36)
Yellow/Blue (37) Yellow/Blue (38)
Tan/Black (84) Tan/Black (85)
S-WCT
Circuit 1
L-WCT
Circuit 1
S-WCT
Circuit 2
L-WCT
Circuit 2
LLT
Black (97)
Yellow
Yellow
Green/Yellow (23)
Yellow (21)
Y1 COMP 1
LC1 Comp A
Alarm
RS DO-9
X2 DO-7
R24VAC SS DO-8
LC2 Comp B
Alarm
X1 Acc
C24VAC COM
TO NOT USED
SC NOT USED
AIC NOT USED LNOT USED O/B REV VALVE
GNOT USED
Y2 COMP 2
16 12
8 2 9 4
10
7 5 3
11
14
6
13
15
1
TB
Black (SS)
Black (C)
Black (RS)
Black (R)
Black (X2)
Black (LC2) Black (LC1)
Black (X1) Black (Y1)
Black (Y2)
Black (O/B)
Black (G)
Black (AIC)
Black (SC)
Black (L)
Black (TO)
B
97P862-01
11/14/13
Black/White
(26)
Black (30) Black (30)
Black (29)
Black (29)
Yellow (25)
Black (28)
Black (28)
Brown (53)
Brown (53)
Brown (52) Brown (52)
Blue (51)
Blue (51)
Black (75A)
Black/Org (75B)
Violet (67) Violet (66) Black/White (63)
Black/White
(62)
Black (54)
Red (55)
Gray (56)
Brown (57)
Gray (59)
Black
Black
CS-A
Circuit A
Black
Black
CS-B
Circuit B
Blue (45)
Blue (45)
Blue (46)
Blue (46)
Blue (45)
Blue (46)
Orange (47)
Orange (47)
Orange (47)
Gray (48)
Connect to R on TB White (88)
White (88)
White (89)
White (89)
Orange (60)
Tan/White (82) Tan/White (83)
Black (A)
Black (A) White (B)
White (B)
RV1 Orange (60A)
ELT
Blue (76A) Blue (76B)
BLACK WIRE HARNESS
Black(D) White (E) Red (F)
Black(K)
White (L)
CPM1 M2M1
Black (70A)
Black/Org (70B)
Black (72A)
Notes
2 - Disconnect for 15 degree load side freeze protection
3 – Acc output is cycled with the lead compressor. 4 - A field installed flow switch is required for the load side and must be connected to
PB2-3 for the unit to operate.
1 - Disconnect for 15 degree source side freeze protection
6 - Jumpers must be set as shown for correct control operation. If a communication card is present, it must be removed to check the jumpers.
5 – A field installed flow switch is required for the source side and must be connected to R for the unit to operate.
7 – Reversing Valve will be energized for heating mode.
9 – M1 and M2 are located on the compressor protection modules (CPM1 and CPM2)
inside of the compressor junction boxes. Only used on the 600 model.
8 – In Emergency Shutdown, line voltage is still present in control box. Emergency
Switch is wired on low voltage circuit only.
NOTE 3
NOTE 5
NOTE 7
NOTE 7
NOTE 9
NOTE 9
Ground
Legend
CC – Compressor Contactor CS – Current Switch ELT – Entering Load Temp ES – Emergency Shutdown
EST – Entering Source Temp HP – High Pressure LFS – Load Flow Switch LLT – Leaving Load Temp
LP – Low Pressure LST – Leaving Source Temp L-WCT – Load Water Coil Temp
PB – Power Block RV – Reversing Valve SFS – Source Flow Switch S-WCT – Source Water Coil Temp
TB – Terminal Board
PGM – Phase Guard Monitor
CPM – Compressor Protection Module
Factory low voltage wiring
Factory line voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
Field Supplied Option
Thermistor
Relay coil
T
Open Jumper
Closed Jumper
¼” Quick Connector
10 – Only used on the 600 model.
Blue (98)
Black (71A)
L1 L2 L3
L2L1 L3
G
L1 L2 L3
L2L1 L3
L1 L2 L3
L2L1 L3
Disconnect (fused disconnect optional)
Black(A)
Red (M)
Black(G) Red(C)
Red(J)
White(B)
White(H)
Disconnect handle
(through the door)
White
Current Switch
CS1 Black
Black
L2 (IN)
L2 (OUT)
L1 (IN)
L1 (OUT)
Soft
Start
L3
CC1
L1L2L3
T1T2T3
Compressor
(Circuit 1)
White (P)
Black
Grn/Yel
Black
Red
Black
Blue
Red
T2 S2 S1
Compressor
Protection
Module #1
(CPM1)
NOTE 10
T1
T3 L
N
F4
L1L2L3
T1T2T3 CC2
T1
T2
T3 S1
S2
Earth Ground
Blue
Blue
White
L2 (IN)
L2 (OUT)
L1 (IN)
L1 (OUT)
Soft
Start
L3
Compressor
(Circuit 2)
Black (Q)
White (R)
Black
Grn/Yel
Black
Red
Black
Blue
Red
T2 S2 S1 NOTE 10
T1
T3 L
N
Compressor
Protection
Module #2
(CPM2)
Current Switch
Black
Black
CS2
F5 F6
F1 F2 F3
F7 F8 F9
F10 F11
Black (N)
Yellow (19)
Black/White (20) Yellow (17)
Black/White (18)
2
3
1
Black (95)
Black/White (22)
Green/Yellow (16)
Black/White
(22)
Yellow
(24)
Yellow
(21)
CPM2 M2M1 Black/Org
(72B)
Black/Org
(71B)
Yellow (24)
Orange (60)
Black
Yellow
Orange (61A)
F - Fuse
Black (70A)
White (88)
Black/Org (75B)
Black (75A)
White (89)
Black/Org (70B)
T T
Tan/Black (85) Tan/Black (84)
Yellow/Blue (38) Yellow/Blue (37)
T T T
Yellow/Red (35) Yellow/Red (36)
White/Blue (34) White/Blue (33)
White/Red (81) White/Red (80)
Orange (61A)
RV2 Orange/Wht (61B)
TTan/White (82)
Tan/White (83)
T T
EST
LST Brn/Blk (42)
Brn/Blk (41)
Brn/Wht (87) Brn/Wht (86)
LP-1 Blue (76A)
Blue (49A)
Blue/Wht (49B) Blue/Wht (76B)
LP-2
Black (73A) Black (74A)
HP-1
Black/Org (73B)
Black/Org (74B)
HP-2
14 13
2 1 7 8 9
10 19 20
21
22 34
35 31 32
4 3
16 15
5 6
17 18 29 28 26 25
Orange (61B)
Orange (61A) Orange (61B)
LFS
2
3
1
PB2 ES
NOTE 1 NOTE 2
NOTE 4
NOTE 8
Orange/Wht (60B)
Orange (60)
Black (49)
Black
Pink (58)
Brown (99)
Yellow
Black/White
Black (97)
Blue (98)
Black/White (26)
Black/White (62)
S2
S3
S1
S6
S5
Brn/Blk (42)
Brn/Blk (41)
Brn/Wht (87)
Brn/Wht (86)
White (88)
Black (70A)
Black/Org (70B)
White (89)
Orange (60)
Black/Org (75B)
Black (75A)
Blue (45)
Blue (46)
Orange (47)
S - Splice
Red for 208V
Blue for 230-240V
Red for 380V
Blue for 460V Blue for 575V
Black
Black (F20)
Black (F19)
CC2 CC1

18
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Wiring Schematics cont.
Chiller with Phase Guard
T1
T2
T3 S1
S2
Earth Ground
Blue
Blue
Page 1
24V
Transformer
SFS
Johnson FX-10
5VDC
AI3
35
36
37
38
+
-
AI5
-
+
AI4
-
+
AI6
AI2
AI1
5VDC
5VDC
LED
- - -
+ + +
24VAC
24VAC Com
GROUND
39 40
41
PWM2 PWM2 Com PWM1
42
43
44
45
46
47 48
24VAC Com DI12 DI11 DI10 DI9 DI8 DI7
49
50 51
52
53 54
55 56
DI 3/4/5/6/ Com DI6 DI5 DI4 DI3 DI2 DI1 9VDC
20
19
18
17
16
15 14
13
12
11
10
9
8
7 6 5
4
3
2
1
D09
D08 D07
D0
6
D05 D04 D03 D02 D01
J8 J2
J10
J9
J7
NOTE 6
A21A12
A25 A22
A32
A31
A35
A23
A13
A11
A15
A14
A24
A34
A33
34
31
30
29
28
27
26
25
24
23
22
21
20
AI4 EXP
5Vdc Com J2
5Vd
c
5Vdc Com
AI3 EXP
5Vd
c
5Vdc Com
AI2 EXP
5Vd
c
5Vdc Com
AI1 EXP
5Vd
c
17
16
15
14
13
12
11
10
DO3
24 Vac
DO4
DO5
DO6
24 Vac
24 Vac Com
J3
24 Vac
J1
Main Board
Connection
A41
A31
A23
A13
A43
A42
A32
A33
A21A22
A12
A11
4
3
2
1
D02
D01
6
D07
5
8
D08
7
Johnson FX10
Expansion Board
Unit Power Supply
PB1
Black (F1)
Black (F2)
Black (F3)
Black (F4)
Black (F5)
Black (F6)
Black (F7)
Black (F8) Black (F9)
Black (F10)
Black (F11)
Black (F12)
Black (F13)
Black (F14)
Black (F15)
Black (F16) Black (F17)
Black (F18)
Black (F19) Black (F20)
1 2
3 4
5 7
8 9
10
6
11 12 13
16 15 14
17
20
19 18
A
33 32 31 30 29 28 27 26 25 24 23
White/Red (80) White/Red (81)
White/Blue (33) White/Blue (34)
Yellow/Red (35) Yellow/Red (36)
Yellow/Blue (37) Yellow/Blue (38)
Tan/Black (84) Tan/Black (85)
S-WCT
Circuit 1
L-WCT
Circuit 1
S-WCT
Circuit 2
L-WCT
Circuit 2
LLT
Black (97)
Yellow
Yellow
Green/Yellow (23)
Yellow (21)
Y1 COMP 1
LC1 Comp A
Alarm
RS DO-9
X2 DO-7
R24VAC SS DO-8
LC2 Comp B
Alarm
X1 Acc
C24VAC COM
TO NOT USED
SC NOT USED
AIC NOT USED LNOT USED O/B REV VALVE
GNOT USED
Y2 COMP 2
16 12
8 2 9 4
10
7 5 3
11
14
6
13
15
1
TB
Black (SS)
Black (C)
Black (RS)
Black (R)
Black (X2)
Black (LC2) Black (LC1)
Black (X1) Black (Y1)
Black (Y2)
Black (O/B)
Black (G)
Black (AIC)
Black (SC)
Black (L)
Black (TO)
B
97P862-02
11/14/13
Black/White
(26)
Black (30) Black (30)
Black (29)
Black (29)
Yellow (25)
Black (28)
Black (28)
Brown (53)
Brown (53)
Brown (52) Brown (52)
Blue (51)
Blue (51)
Black (75A)
Black/Org (75B)
Violet (67) Violet (66) Black/White (63)
Black/White
(62)
Black (54)
Red (55)
Gray (56)
Brown (57)
Gray (59)
Black
Black
CS-A
Circuit A
Black
Black
CS-B
Circuit B
Blue (45)
Blue (45)
Blue (46)
Blue (46)
Blue (45)
Blue (46)
Orange (47)
Orange (47)
Orange (47)
Gray (48)
Connect to R on TB White (88)
White (88)
White (89)
White (89)
Orange (60)
Tan/White (82) Tan/White (83)
Black (A)
Black (A) White (B)
White (B)
RV1 Orange (60A)
ELT
Blue (76A) Blue (76B)
BLACK WIRE HARNESS
Black(D) White (E) Red (F)
Black(K)
White (L)
CPM1 M2M1
Black (70A)
Black/Org (70B)
Black (72A)
Notes
2 - Disconnect for 15 degree load side freeze protection
3 – Acc output is cycled with the lead compressor. 4 - A field installed flow switch is required for the load side and must be connected to
PB2-3 for the unit to operate.
1 - Disconnect for 15 degree source side freeze protection
6 - Jumpers must be set as shown for correct control operation. If a communication card is present, it must be removed to check the jumpers.
5 – A field installed flow switch is required for the source side and must be connected to R for the unit to operate.
7 – Reversing Valve will be energized for heating mode.
9 – M1 and M2 are located on the compressor protection modules (CPM1 and CPM2)
inside of the compressor junction boxes. Only used on the 600 model.
8 – In Emergency Shutdown, line voltage is still present in control box. Emergency
Switch is wired on low voltage circuit only.
NOTE 3
NOTE 5
NOTE 7
NOTE 7
NOTE 9
NOTE 9
Ground
Legend
CC – Compressor Contactor CS – Current Switch ELT – Entering Load Temp ES – Emergency Shutdown
EST – Entering Source Temp HP – High Pressure LFS – Load Flow Switch LLT – Leaving Load Temp
LP – Low Pressure LST – Leaving Source Temp L-WCT – Load Water Coil Temp
PB – Power Block RV – Reversing Valve SFS – Source Flow Switch S-WCT – Source Water Coil Temp
TB – Terminal Board
PGM – Phase Guard Monitor
CPM – Compressor Protection Module
Factory low voltage wiring
Factory line voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
Field Supplied Option
Thermistor
Relay coil
T
Open Jumper
Closed Jumper
¼” Quick Connector
10 – Only used on the 600 model.
Blue (98)
Black (71A)
L1 L2 L3
L2L1 L3
G
L1 L2 L3
L2L1 L3
L1 L2 L3
L2L1 L3
Disconnect (fused disconnect optional)
Black(A)
Red (M)
Black(G) Red(C)
Red(J)
White(B)
White(H)
Disconnect handle
(through the door)
White
Current Switch
CS1 Black
Black
CC1
L1L2L3
T1T2T3
Compressor
(Circuit 1) Grn/Yel
Red
Black
Blue
Red
T2 S2 S1
Compressor
Protection
Module #1
(CPM1)
NOTE 10
T1
T3 L
N
F4
L1L2L3
T1T2T3 CC2
T1
T2
T3 S1
S2
Earth Ground
Blue
Blue
White
Compressor
(Circuit 2) Grn/Yel
Black
Red
Black
Blue
Red
T2 S2 S1 NOTE 10
T1
T3 L
N
Compressor
Protection
Module #2
(CPM2)
Current Switch
Black
Black
CS2
F5 F6
F1 F2 F3
F7 F8 F9
F10 F11
Yellow (19)
Black/White (20) Yellow (17)
Black/White (18)
2
3
1
Black (95)
Black/White (22)
Green/Yellow (16)
Black/White
(22)
Yellow
(24)
Yellow
(21)
CPM2 M2M1 Black/Org
(72B)
Black/Org
(71B)
Yellow (24)
Orange (60)
Black
Yellow
Orange (61A)
F - Fuse
Black (70A)
White (88)
Black/Org (75B)
Black (75A)
White (89)
Black/Org (70B)
T T
Tan/Black (85) Tan/Black (84)
Yellow/Blue (38) Yellow/Blue (37)
T T T
Yellow/Red (35) Yellow/Red (36)
White/Blue (34) White/Blue (33)
White/Red (81) White/Red (80)
Orange (61A)
RV2 Orange/Wht (61B)
TTan/White (82)
Tan/White (83)
T T
EST
LST Brn/Blk (42)
Brn/Blk (41)
Brn/Wht (87) Brn/Wht (86)
LP-1 Blue (76A)
Blue (49A)
Blue/Wht (49B) Blue/Wht (76B)
LP-2
Black (73A) Black (74A)
HP-1
Black/Org (73B)
Black/Org (74B)
HP-2
14 13
2 1 7 8 9
10 19 20
21
22 34
35 31 32
4 3
16 15
5 6
17 18 29 28 26 25
Orange (61B)
Orange (61A) Orange (61B)
LFS
2
3
1
PB2 ES
NOTE 1 NOTE 2
NOTE 4
NOTE 8
Orange/Wht (60B)
Orange (60)
Black (49)
Black
Pink (58)
Brown (99)
Black/White
Black (97)
Blue (98)
Black/White (26)
Black/White (62)
S2
S3
S1
S6
S5
Brn/Blk (42)
Brn/Blk (41)
Brn/Wht (87)
Brn/Wht (86)
White (88)
Black (70A)
Black/Org (70B)
White (89)
Orange (60)
Black/Org (75B)
Black (75A)
Blue (45)
Blue (46)
Orange (47)
S - Splice
Black
Black(7)
White (8)
Red (9)
L3L2L1
Phase Guard Monitor (PGM)
Y
PGM Y-OUT
Y
C
Black/White (27)
Yellow (100)
Yellow
Yellow (80)
Red for 208V
Blue for 230-240V
Red for 380V
Blue for 460V Blue for 575V
Black
CC2 CC1

19
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
TB Typical AquaStat
24VAC
24V COM
Comp 1
Comp 2
Rev Valve
Acc 2
Acc 1
Alarm
Circuit 1 Alarm
Circuit 2 Alarm
24VAC
24V COM
Comp 1
Comp 2
Rev Valve
Accessory Item 1
R
C
Y1
Y2
O/B
X2
X1
L
LC1
LC2
R
C
Y1
Y2
B
NOTES:
1) Acc Output 1 is cycled with the lead compressor
2) Acc Output 2 is cycled with the lag compressor
Unit Power Supply
208-230/60/3,
460/60/3, or 575/60/3
GL3 L1
L2
PB
Black
Red
White
Black
White
Red
Field Wiring and Control Setup
High Voltage Connections
Low Voltage Connections
Line Voltage
Power supply wiring connects directly to lugs on the topo of the
electrical disconnect. In 208-230V applications, heat pumps are
factory wired for 208V supply. In the case of 230V supply, the
blue and red wires from the primary of the transformer will need
to be swapped.
Low Voltage Operation
Thermostat/Controller (Aquastat)
A two-stage 24VAC aquastat or liquid controller (field supplied)
must be used to turn the reversible chiller on/off, and to switch
modes for heating/cooling. Multiple chillers in the same bank must
be controlled from one aquastat/controller (must be isolation relays
for multiple unit applications).
Low Voltage Connections
Connect low voltage wiring as shown in Figure 9. Connections
shown are for typical aquastat. Actual connections may vary with
specific device used.
NOTE: If a separate transformer is used to supply a Y1, Y2, or B
signal to the unit controls, isolation relays must be used.
CAUTION: Use only copper conductors for field
installed wiring. Terminals in the unit are not
designed for other types of conductors.
WARNING: All wiring must comply with local and
state codes. Disconnect the power supply before
beginning to wire to prevent electrical shock or
equipment damage.
NOTE: Accessory 1 output is selectable as normally open or
normally closed using the unit display. Normally closed is the
factory default setting.
Source Flow Switch (SFS)
Unit is factory shipped with no connections on Flow Switch pins J10-
45 (entering). If flow proving switch is required, hook up as shown in
Fig. 10 and Note 5. The unit will not operate with out a flow proving
switch installed.
Load Flow Switch (LFS)
Unit is factory shipped with no connections on Flow Switch pins J9-
56 (leaving). If flow proving switch is required, hook up as shown in
Fig. 10 and Note 4. The unit will not operate with out a flow proving
switch installed.
ATTENTION: Flow Switches must be installed
before unit will operate!
Wiring Schematic
SFS
LFS
ES
42
43
44
45
46
47
48
24VAC Com
DI12
DI11
DI10
DI9
DI8
DI7
49
50
51
52
53
54
55
56
DI 3/4/5/6/ Com
DI6
DI5
DI4
DI3
DI2
DI1
9VDC
J10
J9
2
3
1
PB2
Black(54)
Red(55)
Gray(56)
Pink(58)
Brown(57)
Gray(59)
Blue (45)
Blue (46)
Orange(47)
Gray(48)Connect to R on TB White(67)
White(66)
Blue(76A)
Blue(76B)
NOTE1
NOTE2
NOTE 4
NOTE 5
NOTE8

20
RW SERIES REVERSIBLE CHILLER INSTALLATION MANUAL
Field Wiring and Control Setup cont.
Accessory Relay Setup
The accessory output set to “close” upon Y1 compressor call
(compressor is delayed 90 sec. after Y1) but can be set to “open”
with Y1.
To change ACC1:
• Using up and down keys, scroll to “Acc 1 Sel” hit “ENTER” and
“ON Comp” begins flashing
• Using up and down keys, select “ON Comp” for activation with
Y1 Call or “OFF Comp” for deactivation with Y1
Lead/Lag Selection
Compressor Lead/Lag Selection is factory set to “ON” but can be
set to “OFF”.
To change Lead/Lag On/Off:
• Using up and down keys, scroll to “LEAD/LAG SELECT” hit
“ENTER” and “ON” begins flashing
• Using up and down keys, select “ON” for activation or “ OFF” for
deactivation
Anti Short Cycle
High Pressure Protection
Low Pressure Protection
Advanced Freeze Detection Setpoint
Random Start
Display for diagnostics
Reset Lockout at disconnect
Intelligent reset for field installed flow switches
1 Accessory output
Compressor Lead/Lag
Compressor Current Switches
Field Selectable Options
Freeze Detection Sensing Select (DI-4 and DI-5)
The freeze detection temperature sensing selection inputs allow the
user to adjust the setpoints. The source sensors are wired to inputs
AI-3 and AI-4 while the load sensors are wired to inputs AI-5 and
AI-6. The setpoints for both, the load and source, are factory set for
30°F. In order to change the setpoint to 15°F on the source, remove
the jumper wire from DI-4 (wire #56). The load setpoint can be
changed by removing the jumper wire from DI-5 (wire #55).
Accessory Output (DO-4)
The accessory output will be energized 90 seconds prior to the lead
compressor output being energized. When the lead compressor
output is turned off the accessory output will be deactivated
immediately. The output is selectable for normally open or normally
closed operation through the unit mounted user interface or from a
building automation system.
°F or °C - Unit of Measure
Degrees Fahrenheit is factory set, however degrees Celsius can be
selected using the following procedure:
To Change Unit of Measure:
• On FX10 control using up and down keys, scroll to “SETTINGS”
• Using up and down keys, scroll to “UNIT OF MEASURE” hit
“ENTER” and “UNIT OF MEASURE” begins flashing
• Using up and down keys, select “F” for degrees Fahrenheit or “C”
for degrees Celsius
Other Field Options
Other field selectable options are available as shown in the
maintenance menu on page 24 of the FX10 control using a similar
procedure as shown in the above examples. These would include
aquastat enabling, and emergency shutdown.
Control Features
Control and Safety Features
Emergency Shutdown
The emergency shutdown mode can be activated by a command
from a facility management system or a closed contact on DI-2.
The default state for the emergency shutdown data point is off.
When the emergency shutdown mode is activated, all outputs will
be turned off immediately and will remain off until the emergency
shutdown mode is deactivated. The first time the compressor starts
after the emergency shutdown mode has been deactivated, there
will be a random start delay present.
Lockout Mode
Lockout mode can be activated by any of the following fault signals:
refrigerant system high pressure, refrigerant system low pressure,
heating freeze detection, cooling freeze detection, and compressor
current sensor.
When any valid fault signal remains continuously
active for the length of its recognition delay, the controller will go
into fault retry mode, which will turn off both compressors.After
the compressor short cycle delay, the compressors will attempt to
operate once again. If three consecutive faults occur in 60 minutes,
the unit will go into lockout mode, turning off the compressor(s),
enabling the alarm output until the controller is reset. If the control
faults due to the low pressure input being open during the pre-
compressor startup check, the control will go into lockout mode
immediately, disabling the compressors from starting and enabling
the alarm output. The lockout condition can be reset by powering
down the controller, by a command from the BAS, or by the holding
the ESC and Return keys on the user interface for 5 seconds.