Jetson FWCD Series Owner's manual

FWCD Series Chillers
Installation, Operation,
& Maintenance

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Introduction
Read this manual thoroughly before operating or servicing this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your personal safety and the proper
operation of this machine depend upon the strict observance of these precautions.
Attention should be paid to the following statements:
NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Indicates a potentially hazardous situation which, if not avoided, could
result in minor or moderate injury. It could also be used to alert against unsafe practices.
WARNING - Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
DANGER - Danger statements are given to prevent actions that will result in equipment
damage, property damage, severe personal injury or death.

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WARNING
ELECTRIC SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in dangerous
operation, serious injury, death or
property damage.
Improper servicing could result in
dangerous operation, serious injury,
death, or property damage.
•Before servicing, disconnect all
electrical power to the furnace.
More than one disconnect may be
provided.
•When servicing controls, label all
wires prior to disconnecting.
Reconnect wires correctly.
•Verify proper operation after
servicing. Secure all doors with
key-lock or nut and bolt.
WARNING
QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life. Startup and service
must be performed by a trained service
technician. A copy of this manual
should be kept with the unit.
CAUTION
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils used
with R-410A and other refrigerants,
even in trace amounts, in a PVC or
CPVC piping system will result in
stress cracking of the piping and
fittings and complete piping system
failure.

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WARNING
Personal Protective Equipment
(PPE) Required!
Failure to wear proper PPE for the job being
undertaken could result in death or serious
injury. Technicians, in order to protect
themselves from potential electrical,
mechanical, and chemical hazards, MUST
follow precautions in this manual and on the
tags, stickers, and labels, as well as the
instructions below:
•Before installing/servicing this unit,
technicians MUST put on all PPE
required for the work being undertaken
(Examples; cut resistant
gloves/sleeves, butyl gloves, safety
glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash
clothing). ALWAYS refer to
appropriate Safety Data Sheets (SDS)
and OSHA guidelines for proper PPE.
•When working with or around
hazardous chemicals, ALWAYS refer
to the appropriate SDS and
OSHA/GHS (Global Harmonized
System of Classification and Labeling
of Chemicals) guidelines for
information on allowable personal
exposure levels, proper respiratory
protection and handling instructions.
•If there is a risk of energized electrical
contact, arc, or flash, technicians
MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other
country-specific requirements for arc
flash protection, PRIOR to servicing
the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR
VOLTAGE TESTING WITHOUT
PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE
ELECTRICAL METERS AND
EQUIPMENT ARE PROPERLY
RATED FOR INTENDED VOLTAGE.
1. Startup and service must be
performed by a trained service
technician.
2. Every unit has a unique
equipment nameplate with
electrical, operational, and unit
clearance specifications. Always
refer to the unit nameplate for
specific ratings unique to the
model you have purchased.
3. READ THE ENTIRE
INSTALLATION, OPERATION
AND MAINTENANCE
MANUAL. OTHER
IMPORTANT SAFETY
PRECAUTIONS ARE
PROVIDED THROUGHOUT
THIS MANUAL.
4. Keep this manual and all
literature safeguarded near or on
the unit.

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Contents
Introduction..........................................................................................................................................3
Digits 5 to 7 —Nominal Capacity ....................................................................................................12
Digit 8 —Unit Voltage......................................................................................................................12
Digit 9 —Unit Application ...............................................................................................................12
Digit 10 —Refrigerant Style.............................................................................................................12
Digit 11 —Number of Circuits.........................................................................................................12
Digit 12 —Efficiency/Capacity ........................................................................................................13
Digit 13 —Design Sequence.............................................................................................................13
Digit 14 —Array System..................................................................................................................13
Digit 15 —Evaporator Heat Exchanger Type...................................................................................13
Digit 16 —Evaporator Fluid Type....................................................................................................13
Digit 17 —Evaporator Flow .............................................................................................................13
Digit 18 —Evaporator Temperature Range......................................................................................14
Digit 19 —Evaporator Control Valves.............................................................................................14
Digit 20 —Condenser Heat Exchanger Type ...................................................................................14
Digit 21—Condenser Fluid Type......................................................................................................14
Digit 22 —Condenser Heat Recovery ..............................................................................................15
Digit 23 —Condenser Corrosion Resistance....................................................................................15
Digit 24 —Condenser Control Valves..............................................................................................15
Digit 25 —Power Feed .....................................................................................................................15
Digit 26 —Power Connection...........................................................................................................16
Digit 27 —Service Options...............................................................................................................17
Digit 28 —Panel Ampere Rating......................................................................................................17
Digit 29 —Control Style...................................................................................................................17
Digit 30 —Local Unit Controller Interface ......................................................................................18
Digit 31 —Remote BMS Interface (Digital Comm).........................................................................18
General Information...........................................................................................................................23
Unit Components...............................................................................................................................25
Pre-Installation...................................................................................................................................26
Electrical Service Sizing Data ...........................................................................................................27
Dimensions ........................................................................................................................................29
Clearances..........................................................................................................................................35

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Weights..............................................................................................................................................38
Application Information.....................................................................................................................39
Line Sizing Guidelines...................................................................................................................45
Installation Mechanical......................................................................................................................49
Clearances....................................................................................................................................50
Ventilation....................................................................................................................................50
Drainage.......................................................................................................................................50
Handling.......................................................................................................................................50
Forklifting Procedure...................................................................................................................51
Rigging Procedure........................................................................................................................51
Access Restrictions ......................................................................................................................52
Compressor Mounting..................................................................................................................52
Direct Mounting...........................................................................................................................52
Unit Leveling ...............................................................................................................................52
Typical Water Piping ...................................................................................................................52
Avoidance of Short Water Loops.................................................................................................52
Minimum Water Volume for a Process Application ...................................................................53
Unit Piping.....................................................................................................................................53
Exchanger Water Pressures............................................................................................................53
Flow Sensing Devices....................................................................................................................53
Water Piping Recommendations....................................................................................................53
Water Flow Rates...........................................................................................................................54
Chilled Water System Volume ......................................................................................................54
Pressure Drop Curves ....................................................................................................................55
Water Treatment ............................................................................................................................58
Evaporator and Water Piping.........................................................................................................58
Condenser Piping...........................................................................................................................60
Installation Electrical ......................................................................................................................... 61
General Recommendations............................................................................................................61
Checking the Power Supply...........................................................................................................61
Total Supply Voltage.....................................................................................................................62
Voltage Imbalance Between Phases ..............................................................................................62
Equipment Grounding....................................................................................................................62
Unit Power Wiring.........................................................................................................................62

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Scroll Compressor Electrical Phasing............................................................................................63
Setting the Proper Electrical Phase Sequence................................................................................63
Control Power Supply....................................................................................................................63
External Contacts and Peripherals.................................................................................................64
Required Chilled Water Flow Switch............................................................................................64
Condenser Water Loss of Flow Protection....................................................................................64
Required Pump Control .................................................................................................................64
Remote Off/Auto ...........................................................................................................................64
Remote Alarm................................................................................................................................64
Smart Controls...................................................................................................................................65
Controls Interface...............................................................................................................................69
Unit Controller —General ............................................................................................................69
Unit Controller...................................................................................................................................69
Software Installation and Setup.....................................................................................................69
Downloading and Installing Unit Controller (MCS-Connect) Software.......................................69
Connecting to the Chiller...............................................................................................................70
Setpoint Changes ...........................................................................................................................70
Viewing and Troubleshooting ALARMS......................................................................................70
Downloading and Viewing Graphs................................................................................................70
Updating Chiller Software and Configuration Files......................................................................70
Unit Start-Up Procedures...................................................................................................................72
Pre-Start .........................................................................................................................................72
Sequence of Operation...................................................................................................................73
Checking Operating Conditions.....................................................................................................73
System Superheat...........................................................................................................................74
System Subcooling.........................................................................................................................74
Shut Down .........................................................................................................................................75
Normal Unit Shutdown..................................................................................................................75
Extended Shutdown Procedure......................................................................................................75
Unit Restart........................................................................................................................................75
Unit Restart After Extended Shutdown .........................................................................................75
Maintenance.......................................................................................................................................77
Periodic Maintenance.....................................................................................................................77
Weekly Maintenance .....................................................................................................................77

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Monthly Maintenance....................................................................................................................77
Annually.........................................................................................................................................78
Compressor Maintenance...................................................................................................................78
Compressor Oil..............................................................................................................................78
Oil Level ........................................................................................................................................78
Oil Appearance ..............................................................................................................................78
Scroll Compressor Functional Test................................................................................................78
Compressor Operational Noises ....................................................................................................79
Excessive Amp Draw.....................................................................................................................79
Low Suctions .................................................................................................................................79
Heat Exchanger Maintenance............................................................................................................79
When to Clean a Brazed Plate Heat Exchanger (BPHE)...............................................................79
How to Clean a Brazed Plate Heat Exchanger (BPHE).................................................................79
Cleaning in Place (CIP) Procedure................................................................................................79
CIP Fluids ......................................................................................................................................80
Bio Gen Active –Scale 132 Copper..............................................................................................80
Organic Acids ................................................................................................................................80
Formic Acid...................................................................................................................................80
Acetic Acid ....................................................................................................................................80
Citric Acid......................................................................................................................................80
Bases..............................................................................................................................................80
COMMERCIALLY AVAILABLE CIP FLUIDS.........................................................................80
Bio Gen Active –Scale 132 Copper..............................................................................................80
Wiring................................................................................................................................................82
Appendix A........................................................................................................................................93
Warranty ........................................................................................................................................93
Appendix B........................................................................................................................................95
Piping System Flushing Procedure................................................................................................95
Water Treatment Requirements.....................................................................................................95

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Model Number Descriptions
Digits 1 to 4—Model
FWCD
Digits 5 to 7 —Nominal
Capacity
020 = 20 Nominal Tons
030 = 30 Nominal Tons
045 = 45 Nominal Tons
055 = 55 Nominal Tons
065 = 65 Nominal Tons
075 = 75 Nominal Tons
085 = 85 Nominal Tons
Digit 8 —Unit Voltage
A = 208 V/60 Hz/3 Phase
B = 230 V/60 Hz/3 Phase
F = 460 V/60 Hz/3 Phase
G = 575 V/60 Hz/3 Phase
Digits 9 —Unit Application
A = Water-Cooled Chiller
B = Compressor Chiller with
Remote Condenser (40°F to
115°F)
D = Compressor Chiller with
Remote Condenser (20°F)
Digit 10 —Refrigeration Style
A = R-410A Scroll
Digit 11 —Number of Circuits
1 = Single Circuit
2 = Dual Circuit
Digit 12 —Efficiency/Capacity
1 = Standard Efficiency
2 = High-Capacity Evaporator
(allows 40F leaving water)
Digit 13 —Design Sequence
0 = Factory Assigned
Digit 14 —Array System
0 = Non-Array System
1 = Array System
Digit 15 —Evaporator Heat
Exchanger Type
0 = Brazed Plate
Digit 16 —Evaporator Fluid
Type
0 = Water
2 = Ethylene Glycol
3 = Propylene Glycol
Digit 17 —Evaporator Flow
0 = Constant Flow Primary
1 = Variable Flow Primary
Digit 18 —Evaporator
Temperature Range
0 = Standard Cooling
40 to 65°F [5.5 to 18.3°C]
1 = Standard Cooling/Ice Making
20 to 65°F [-6.7 to 18.3°C]
Digit 19 —Evaporator Control
Valves
0 = Manual Balancing Isolating
Valves
1 = Motorized Chilled Water
Isolating Valve
2 = No Valves (Standalone
Chiller)
Digit 20 —Condenser Heat
Exchanger Type
0 = Brazed Plate
1 = Shell and Tube
5 = Remote Condenser
Digit 21—Condenser Fluid
Type
0 = Water
2 = Ethylene Glycol
3 = Propylene Glycol
9 = Not Applicable —
Compressor-Chiller
Digit 22 —Condenser Heat
Recovery
0 = No Heat Recovery
1 = Heat Recovery
Digit 23 —Condenser
Corrosion Resistance
0 = Standard
1 = Cupro-Nickel (Avail. Shell
and Tube Only)
Digit 24 —Condenser Control
Valves
1 = Manual Valve
2 = Motorized Head Pressure
Control Valve
3 = No Valves (Standalone
Chiller)
Digit 25 —Power Feed
0 = Single Point Power (5 kA
Rating)
A = Single Point Power (5 kA
Rating) + Phase and Voltage
Monitor
B = Single Point Power (100 kA
Rating)
C = Single Point Power (100 kA
Rating) + Phase and Voltage
Monitor
D = Power Feed to Each Unit (5
kA Rating)
E = Power Feed to Each Unit (5
kA Rating) + Phase and Voltage
Monitor
F = Power Feed to Each Unit (100
kA Rating)
G = Power Feed to Each Unit
(100 kA Rating) + Phase and
Voltage Monitor
Digit 26 —Power Connection
0 = Terminal Block
A = Non-Fused Disconnect Switch
B = Fused Disconnect Switch
C = High SCCR Fuse Block
D = Distribution Panel
Connection = Terminal Block;
Module Power Connection =
Circuit Breaker
Digit 27 —Service Options
0 = None
A = LED Lighted Control Cabinet
Digit 28 —Panel Ampere
Rating
0 = None
D = 250 Amp
E = 400 Amp
F = 600 Amp
G = 800 Amp
H = 1200 Amp
Digit 29 —Control Style
0 = Master Secondary Controller
w/ Single Controller per Array
A = Supervisory Array Controller
w/ Controller per Module
B = Non-Array, Single Unit
Controller
Digit 30 —Local Unit
Controller Interface
0 = Keypad with Dot Pixel
Display
B = 15.4-in. Color Touchscreen
Digit 31 —Remote BMS
Interface (Digital Comm)
0 = None
2 = Lon Talk®
4 = BACnet® MS/TP
5 = BACnet® IP
6 = MODBUS®
8 = Johnson N2
Digit 32 —Blank
0 = Blank
Digit 33 —Blank
0 = Blank
Digit 34 —Refrigeration
Options
1 = Active Freeze Protection (All
Circuits)
2 = Hot Gas Bypass (All Circuits)

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Digit 35 —Refrigeration
Accessories
0 = Moisture Indicating Sight
Glass
A = Moisture Indicating Sight
Glass + Compressor Isolation
Valves
B = Moisture Indicating Sight
Glass + Replaceable Core Filter
Driers
C = Moisture Indicating Sight
Glass + Replaceable Core Filter
Driers + Compressor Isolation
Valves
D = Moisture Indicating Sight
Glass + Condenser Relief Valves
E = Moisture Indicating Sight
Glass + Condenser Relief Valves
+ Compressor Isolation Valves
F = Moisture Indicating Sight
Glass + Condenser Relief
Valves+ Replaceable Core Filter
Driers
G = Moisture Indicating Sight
Glass + Condenser Relief Valves
+ Replaceable Core Filter Driers
+ Compressor Isolation Valves
Digit 36 —Water Connection
0 = Grooved Pipe Connection,
Standard Header Length
A = Grooved Pipe Connection,
Extended Header Length
D = No Header Piping (Heat
Exchangers Only)
Digit 37 —Water Side
Pressure
0 = 150 psi
A = 300 psi
Digit 38 —Water Strainer(s)
0 = None
A = Chilled Water Flow Wye
Strainer
B = Chilled Water Wye Strainer
with Installation Kit
C = Condenser Water Flow Wye
Strainer
D = Condenser Water Wye
Strainer with Installation Kit
E = Chilled and Condenser Water
Nominal Flow Wye Strainer
F = Chilled and Condenser Water
Wye Strainer with Installation Kit
Digit 39 —Water Accessories
0 = Chilled Water Flow Switch
A = Condenser Water Flow
Switch
B = Analog Water Temperature
Gauge
C = Analog Water Pressure
Gauge
D = Chilled Water Flow Switch +
Condenser Water Flow Switch
E = Chilled Water Flow Switch +
Analog Water Temperature
Gauge
F = Chilled Water Flow Switch +
Analog Water Pressure Gauge
G = Chilled Water Flow Switch +
Condenser Water Flow Switch +
Analog Water Temperature
Gauge
H = Chilled Water Flow Switch +
Condenser Water Flow Switch +
Analog Water Pressure Gauge
J = Chilled Water Flow Switch +
Analog Water Temperature
Gauge + Analog Water Pressure
Gauge
K = Chilled Water Flow Switch +
Condenser Water Flow Switch +
Analog Water Temperature
Gauge + Analog Water Pressure
Gauge
Digit 40 —Blank
0 = Blank
Digit 41 —Sound Attenuator
0 = None
A = Compressor Sound Blankets
B = Factory Sound Enclosure
Cabinet
C = Compressor Sound Blankets
+ Factory Sound Enclosure
Cabinet
Digit 42 —Unit Mounting
0 = None
A = Neoprene Pads
B = Leveling Kit
C = Casters/Wheels
D = Neoprene Pads and
Casters/Wheels
E = Neoprene Pads and Leveling
Kit
Digit 43 —Exterior Finish and
Shipping Splits
0 = Standard Paint, Each Module
Packaged Separately
B = Custom Paint, Each Module
Packaged Separately
Digit 44 —Shipping Options
A = Framed Crate with Plastic
Wrap (Non-Shrink)
D = Fully Enclosed Crate
Digit 45 —Warranty
0 = Standard Warranty
Digit 46 —Special Options
0 = None
X = With Specials

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Digits 5 to 7 —Nominal Capacity
The first numbers of the model string designate nominal tons cooling. Actual capacities will vary
with conditions. Table 1 - Model Sizes
Model
Nominal Tons at AHRI
Compressors
Circuits
FWCD-020
20.5
2
1 or 2
FWCD-030
31.5
FWCD-045
42.7
FWCD-055
52.4
FWCD-065
65.6
FWCD-075
75.1
2
FWCD-085
84.8
2
*Note: The nominal capacities reflect the use of R-410A refrigerant and a standard heat exchanger.
Digit 8 —Unit Voltage
All units have single point power blocks with grounding lugs and 12V control circuits.
A= 208 V/60 Hz/3 Phase
B= 230 V/60 Hz/3 Phase
F= 460 V/60 Hz/3 Phase
G= 575 V/60 Hz/3 Phase
Digit 9 —Unit Application
A = Water-Cooled Chiller –Standard water-cooled chiller with optional shell and tube condenser
or brazed plate condenser and brazed plate evaporator.
B = Compressor Chiller with Remote Condenser –FWCD chillers can be configured without a
condenser and mated with an air-cooled condenser.
Digit 10 —Refrigerant Style
A = R-410A Scroll
Digit 11 —Number of Circuits
1 = Single Circuit –Two compressors per module are piped on a single, tandem circuit to single
circuit evaporators and condenser.
2 = Dual Circuit –Two compressors per module are piped independently to dual circuit evaporator
and condenser.

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Digit 12 —Efficiency/Capacity
1 = Standard Efficiency –Standard sized evaporator.
2 = High-Capacity Evaporator –High-capacity evaporator for glycol applications or for 40F
leaving water applications.
Digit 13 —Design Sequence
0 = Factory Assigned
Digit 14 —Array System
0 = Non-Array System –FWCD chillers can be applied in standalone applications needing
between 20 to 75 tons of cooling. In standalone applications, chiller headers are not required and the
“no header” option can be selected in Digit 36.
1 = Array System - More than one FWCD modular chiller may be piped together (to form an array
of chillers) for higher capacity and/or redundant chiller applications, an array controller package
must be provided from the factory. The number of modular chillers that can be physically piped
together to form an array and share a common header is limited to approximately 300 total tons or
900 gpm.
Digit 15 —Evaporator Heat Exchanger Type
0 = Brazed Plate - Brazed plate heat exchangers are one of the most efficient ways to transfer heat.
They are designed to provide unparalleled performance with the lowest life-cycle cost.
Digit 16 —Evaporator Fluid Type
0 = Water
2 = Ethylene Glycol
3 = Propylene Glycol
Digit 17 —Evaporator Flow
0 = Constant Flow Primary - Constant flow pumping systems utilize a staged cooling system and
a constant flow water pumping system. No modules are isolated at part load. Flow from “off”
chillers mixes with the flow from active chillers in creating the leaving array temperature. The load
may not be less than 25% of the full load in constant flow applications.
1 = Variable Flow Primary - Variable flow systems utilize compressor staging and motorized
isolation valves with a variable flow water pumping system to modulate cooling and water flow to
meet chilled water needs and save operating energy costs. Cooling capacity is modulated by staging

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compressors and isolating modules based on the desired leaving water temperature. Water flow
control is field provided and is usually modulated with VFD controlled variable flow primary
pumps based on the differential pressure across the water system.
Digit 18 —Evaporator Temperature Range
0 = Standard Cooling 40 to 65°F [5.5 to 18.3°C] –The chiller with standard evaporator must not
be operated with a leaving water temperature of less than 42°F for a plain water application. The
chiller with high-capacity evaporator must not be operated with a leaving water temperature of less
than 40°F for a plain water application.
1 = Standard Cooling/Ice Making 20 to 65°F [-6.7 to 18.3°C] - The dual roles of an ice-making
chiller can substantially reduce the installed cost of the system. An ice-making chiller is NOT a
conventional chiller with two different leaving-fluid temperature setpoints. An ice-making chiller
operates at maximum capacity when in ice-making mode. It continues to operate at maximum
capacity until the leaving-fluid temperature reaches the target setpoint. At a 10°F delta across the
evaporator, this limit indicates that all of the water inside the ice storage tanks has been frozen. An
external signal can be sent to the chiller to reset the chilled water setpoint back to conventional
chilled water leaving fluid temperature and the chiller will return to traditional chiller operation.
Digit 19 —Evaporator Control Valves
0 = Manual Balancing Isolating Valves - For a proper hydronic balance in a constant flow system,
manual balancing valves are factory installed in array headers. These valves can also be used to
isolate a module in an array for service or cleaning.
1 = Motorized Chilled Water Isolating Valve - Variable flow systems isolate modules not needed
to meet current cooling or heating capacity by isolating modules with a factory installed motorized
on-off valve.
2 = No Valves (Standalone Chiller) –Balancing / isolating valves are not required when chiller is
used in single unit configuration.
Digit 20 —Condenser Heat Exchanger Type
0 = Brazed Plate –Brazed plate heat exchanger with grooved pipe water connections.
1 = Shell and Tube - Shell and tube heat exchanger with grooved pipe water connections.
5 = Remote Condenser –Water-cooled condenser is removed and discharge and liquid line
connections are provided for connection to remote air-cooled condenser.
Digit 21—Condenser Fluid Type
0 = Water
2 = Ethylene Glycol
3 = Propylene Glycol
9 = Not Applicable —Compressor-Chiller

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Digit 22 —Condenser Heat Recovery
0 = No Heat Recovery –Chiller operates to maintain chilled water temperature. Condenser water
temperature is unmonitored.
1 = Heat Recovery - Instead of rejecting heat to the cooling tower, heat is recovered from the
condenser water and can be used in many commercial facilities for preheating incoming air,
washing, showering, and other everyday usage. Such facilities include:
•Hospitals, laundry, showers, and sterilization (often separate from other systems)
•Dormitories: laundry, showers, and general usage
•Hotels: laundry, showers, pool heat, and general usage
All of these facilities require large quantities of makeup water that must be heated.
Digit 23 —Condenser Corrosion Resistance
0 = Standard
1 = Cupro-Nickel (Avail. Shell and Tube Only) - In applications that can cause chemical
corrosion, galvanic corrosion and erosion, the FWCD Series chiller is available with a shell and
tube condenser that has high-resistance material tubes consisting of cupro-nickel (Cu/Ni 90/10).
Digit 24 —Condenser Control Valves
1 = Manual Valve - For a proper hydronic balance in a constant flow system, manual balancing
valves are factory installed in array headers. These valves can also be used to isolate a module in an
array for service or cleaning.
2 = Motorized Head Pressure Control Valve - The integral condenser water regulating valve
option is available to stabilize and maintain the refrigerant condensing pressure within the operating
limits of the FWCD Series modular chiller. The valve will replace one of the manual isolating
valves that come standard on every chiller and can also be used to isolate the condenser from the
cooling water circuit when needed.
3 = No Valves (Standalone Chiller) –Balancing / isolating valves are not required when chiller is
used in single unit configuration.
Digit 25 —Power Feed
0 = Single Point Power (5 kA Rating) - This option reduces the amount of installation labor by
eliminating the need to run separate power to each module in the chiller array. A single connection
point is provided to power the array. With this option, the array of chillers is delivered with a
separate power panel enclosure. This separate enclosure includes the electrical lug to land the
incoming power cables. The cabinet has circuit breakers for each module in the array. Power wiring
will be distributed to each chiller module through a wire chase that is part of each individual chiller
control panel. Upon installation, the factory supplied electrical whips will be routed to each module

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through control panels. Conduits are also factory provided to encase the power wiring as it is routed
between one chiller module and the next.
A = Single Point Power (5 kA Rating) + Phase and Voltage Monitor - This option includes the
single-point power distribution panel. A factory-installed phase/power monitor designed to protect
the chiller from premature failure and damage due to common voltage faults such as voltage
unbalance, over/under voltage, phase loss, reversal, incorrect sequencing and rapid short cycling is
included.
B = Single Point Power (100 kA Rating) - Short-circuit current ratings provide the level of fault
current that a component or piece of equipment can safely withstand (based on a fire and shock
hazard external to the enclosure). A 100kA SCCR can have significant impact in meeting safety and
insurance requirements.
C = Single Point Power (100 kA Rating) + Phase and Voltage Monitor - This option includes
the single-point power distribution panel and each unit is rate for 100ka SCCR. A factory-installed
phase/power monitor designed to protect the chiller from premature failure and damage due to
common voltage faults such as voltage unbalance, over/under voltage, phase loss, reversal, incorrect
sequencing and rapid short cycling is included.
D = Power Feed to Each Unit (5 kA Rating) –Power is field provided to each chiller module in
the array. This is beneficial in applications where redundancy or dual point power is desirable or to
allow for smaller electrical feeds instead of a large single electrical feed.
E = Power Feed to Each Unit (5 kA Rating) + Phase and Voltage Monitor - This option
includes field provided power and an additional factory-installed phase/power monitor designed to
protect the chiller from premature failure and damage due to common voltage faults such as voltage
unbalance, over/under voltage, phase loss, reversal, incorrect sequencing and rapid short cycling.
F = Power Feed to Each Unit (100 kA Rating) - Short-circuit current ratings provide the level of
fault current that a component or piece of equipment can safely withstand (based on a fire and shock
hazard external to the enclosure). A 100kA SCCR can have significant impact in meeting safety and
insurance requirements.
G = Power Feed to Each Unit (100 kA Rating) + Phase and Voltage Monitor - This option
includes field provided power and an additional factory-installed phase/power monitor designed to
protect the chiller from premature failure and damage due to common voltage faults such as voltage
unbalance, over/under voltage, phase loss, reversal, incorrect sequencing and rapid short cycling.
Digit 26 —Power Connection
0 = Terminal Block - Terminal Block to land incoming power wiring.
A = Non-Fused Disconnect Switch - Non-fusible disconnect switches do not incorporate fuses
into their enclosure and provide no circuit protection capability. The purpose of a non-fusible safety
switch is to provide an easy means to open and close a circuit.
B = Fused Disconnect Switch - Fusible disconnect switches combine fuses with the switch in a
single enclosure, providing an easy means to manually open and close the circuit while the fuses
protect against overcurrent.
C = High SCCR Fuse Block - Short-circuit current ratings provide the level of fault current that a
component or piece of equipment can safely withstand (based on a fire and shock hazard external to
the enclosure). A 100kA SCCR can have significant impact in meeting safety and insurance
requirements.

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D = Distribution Panel Connection = Terminal Block; Module Power Connection = Circuit
Breaker –This feature is used for the single point power options in Digit 25. Factory provided
panelboard serves as a power distribution panelboard for chiller array.
Digit 27 —Service Options
0 = None
A = LED Lighted Control Cabinet - LED lights provide bright lighting inside enclosure offer with
long service life and can provide improve safety and visibility when service inside the enclosure is
needed.
Digit 28 —Panel Ampere Rating
Panelboard rating for single point power. Panel is factory sized and provide when single point
power option is selected.
0 = None
D = 250 Amp
E = 400 Amp
F = 600 Amp
G = 800 Amp
H = 1200 Amp
Digit 29 —Control Style
0 = Master Secondary Controller w/ Single Controller per Array - This option allows up to six
(6) FWCD modular chillers to be controlled and operated. The Master-Secondary Array Controller
requires only a single controller for the array. This option is beneficial in replacement applications
where a single larger chiller, with one controller, is replaced by modular
chillers controlled with one controller.
A = Supervisory Array Controller w/ Controller per Module - This option allows up to ten (10)
FWCD modular chillers to be controlled and operated. The Supervisory Array Controller requires
each module have an individual unit controller. This option is beneficial in applications requiring
seven (7) or more modules to be controlled and in applications where chiller uptime is critical. If
communication between the individual FWCD modular chiller unit controller(s) and the
Supervisory Array Controller is lost, or the Supervisory Array Controller fails, the individual
FWCD modular chillers can be shifted into manual mode to operate independent from the
Supervisory Array Controller and will maintain a “manual mode” default chilled leaving water
temperature set point.
B = Non-Array, Single Unit Controller –Standalone Controller has control board with twelve 0-
5vdc sensor inputs, four 5vdc digital inputs, ten 230vac 6.3amp relay outputs, four 0-10vdc analog
outputs, keypad, 128 x 64 dot pixel STN monochrome graphics LCD with 2.8" diagonal viewing
area, real time clock, MCS-I/O, RS-232, RS-485 and Ethernet communication ports.

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Digit 30 —Local Unit Controller Interface
0 = Keypad with Dot Pixel Display - keypad, 128 x 64 dot pixel STN monochrome graphics LCD
with 2.8" diagonal viewing area
B = 15.4-in. Color Touchscreen - Information and graphics are shown on high resolution
(1280x800) LCD display with LED back lighting. The high-resolution screen makes it easy for the
user to manage complex installations without losing the overall view or requiring a separate laptop.
Pages can be navigated in a fast and straightforward manner.
Digit 31 —Remote BMS Interface (Digital Comm)
0 = None
2 = Lon Talk®
4 = BACnet® MS/TP
5 = BACnet® IP
6 = MODBUS®
8 = Johnson N2
Digit 32 —Blank
0 = Blank
Digit 33 —Blank
0 = Blank
Digit 34 —Refrigeration Options
1 = Active Freeze Protection (All Circuits) –Active freeze protection is a suction pressure-based
freeze protection. Active Freeze Protection is standard on all FWCD Series chillers. The chiller’s
unit controller continually monitors the saturated suction pressure and will open (energize) the
Active Freeze Protection solenoid if the suction pressure falls to approximately 101 psig (32°F).
The solenoid closes (de-energizes) when the pressure climbs to approximately 105 psig (34°F) and
the freezing potential no longer exists.
2 = Hot Gas Bypass (All Circuits) - Hot gas bypass can stabilize the system balance point by
diverting hot, high- pressure refrigerant vapor from the discharge line directly to the low-pressure
side of the system. This tactic keeps the compressor more fully loaded while the evaporator satisfies
the part-load condition. The Jetson Active Freeze Protection can be configured to function as Hot
Gas Bypass by configuring the controller to monitor both the leaving water temperature and the
suction temperature. In Hot Gas Bypass operating mode, the Active Freeze Protection provides an
additional step of capacity.

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Digit 35 —Refrigeration Accessories
0 = Moisture Indicating Sight Glass - The sight glass shows if the liquid line has a full line of
liquid or if it has bubbles which shows it’s a liquid/vapor mix. It should not be used to determine
proper charge. The moisture indicator shows if the system is dry or if it has harmful moisture
content.
A = Moisture Indicating Sight Glass + Compressor Isolation Valves –In addition to the
Moisture Indicating Sight Glass, ball type Compressor Isolation Valves are mounted on the cooling
circuit discharge and suction lines permitting isolation of the compressor for service or replacement.
The valves are located close to the compressors. The valve works through a quarter turn from open
to closed. Teflon seals and gaskets are used with a nylon cap gasket to prevent accidental loss. This
option reduces the amount of refrigerant that must be recovered during compressor service or
replacement since closing these valves isolates the compressor.
B = Moisture Indicating Sight Glass + Replaceable Core Filter Driers - In addition to the
Moisture Indicating Sight Glass, Replaceable Core Filter Driers allow for easy changeout of the
filter-drier element.
C = Moisture Indicating Sight Glass + Replaceable Core Filter Driers + Compressor Isolation
Valves
Digit 36 —Water Connection
0 = Grooved Pipe Connection, Standard Header Length
A = Grooved Pipe Connection, Extended Header Length –To provide additional spacing
beyond the standard ¾” between modules, the Grooved Pipe Connection, Extended Header Length
Kit consists of grooved pipe couplings and spacer pipe to allow for easy installation of water
manifold units.
D = No Header Piping (Heat Exchangers Only) –When chiller is used in standalone operation
(i.e., single module) an array header is not necessary. It is a cost savings to use the 6” array header
only when needed for array applications or it is desirable to keep field piping to a minimum. Field
piping can be connected to heat exchangers instead of factory provided header.
Figure 1 - No Header, Heat Exchangers Only Configuration

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Digit 37 —Water Side Pressure
0 = 150 psi
A = 300 psi
Digit 38 —Water Strainer(s)
0 = None
A = Chilled Water Flow Wye Strainer –Factory provided, field installed wye strainer can be
placed in a horizontal or vertical pipeline as long as the screen is in a downward position. Straining
is accomplished via a 20-mesh lined straining element.
B = Chilled Water Wye Strainer with Installation Kit - Wye strainer installation kits provide
piping transitions need to easily attach the wye strainer to the chiller.
C = Condenser Water Flow Wye Strainer –Factory provided, field installed wye strainer can be
placed in a horizontal or vertical pipeline as long as the screen is in a downward position. Straining
is accomplished via a 20-mesh lined straining element.
D = Condenser Water Wye Strainer with Installation Kit - Wye strainer installation kits provide
the piping transitions needed to easily attach the wye strainer to the chiller.
E = Chilled and Condenser Water Nominal Flow Wye Strainer
F = Chilled and Condenser Water Wye Strainer with Installation Kit
Digit 39 —Water Accessories
0 = Chilled Water Flow Switch - An evaporator flow-proving device is required for all FWCD
Series chiller applications. A paddle style liquid flow switch is available with a NEMA Type 4X
enclosure for field-installation.
A = Condenser Water Flow Switch - A paddle style liquid flow switch is available with a NEMA
Type 4X enclosure for field-installation.
B = Analog Water Temperature Gauge - Temperature gauges are factory installed on water lines
to indicate water temperature.
C = Analog Water Pressure Gauge - Pressure gauges are factory installed on water lines to
indicate pressure drop across heat exchangers.
D = Chilled Water Flow Switch + Condenser Water Flow Switch
E = Chilled Water Flow Switch + Analog Water Temperature Gauge
F = Chilled Water Flow Switch + Analog Water Pressure Gauge
G = Chilled Water Flow Switch + Condenser Water Flow Switch + Analog Water
Temperature Gauge
H = Chilled Water Flow Switch + Condenser Water Flow Switch + Analog Water Pressure
Gauge
J = Chilled Water Flow Switch + Analog Water Temperature Gauge + Analog Water
Pressure Gauge
K = Chilled Water Flow Switch + Condenser Water Flow Switch + Analog Water
Temperature Gauge + Analog Water Pressure Gauge