DuraChill DCA203D1/S1 User manual

Operator’s Manual
DuraChill™Air- and Water-Cooled 2 and 3 HP Chillers
110-275
25 February 2015

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Table of Contents
Introduction.............................................................................................................................................................. 3
Standard and Optional Features............................................................................................................................ 3
Standard Features.............................................................................................................................................. 3
Optional Features............................................................................................................................................... 3
General Safety Information .................................................................................................................................... 4
Safety Recommendations...................................................................................................................................... 4
Regulatory Compliance and Testing...................................................................................................................... 6
Unpacking .............................................................................................................................................................. 6
Contents................................................................................................................................................................. 6
Controls and Components ..................................................................................................................................... 7
Control Panel...................................................................................................................................................... 7
Front View .......................................................................................................................................................... 7
Rear View ........................................................................................................................................................... 8
Installation and Startup........................................................................................................................................... 9
Site Requirements ................................................................................................................................................. 9
Ambient Temperature and Relative Humidity .................................................................................................... 9
Location .............................................................................................................................................................. 9
Clearance ........................................................................................................................................................... 9
External Piping..................................................................................................................................................... 10
General Considerations.................................................................................................................................... 10
Process Fluid Connections............................................................................................................................... 11
Facility Water Connections............................................................................................................................... 11
Reservoir Drain................................................................................................................................................. 11
Full Flow Bypass .............................................................................................................................................. 11
Process Coolant................................................................................................................................................... 13
Electrical Power ................................................................................................................................................... 14
Optional Signal Inputs/Outputs ............................................................................................................................ 15
RS-232/RS-485 Serial Output .......................................................................................................................... 15
Remote On / Off Port........................................................................................................................................ 15
Alarm Output .................................................................................................................................................... 15
Startup.................................................................................................................................................................. 16
Facility Water Flow (water-cooled units only)................................................................................................... 16
Filling the Reservoir.......................................................................................................................................... 16
Starting Process Fluid Flow.............................................................................................................................. 16
Normal Operation .................................................................................................................................................. 17
Selecting the Temperature Unit ........................................................................................................................... 17
Displaying and Adjusting the Set Point................................................................................................................ 17
Selecting the Pressure / Flow Rate Display and Units ........................................................................................ 18
Setting Operational Parameters / Limits .............................................................................................................. 18
High Temperature Limit (HL)............................................................................................................................ 20
Low Temperature Limit (LL) ............................................................................................................................. 20
High Ambient Temperature Limit (HA) ............................................................................................................. 20
Maximum Fluid Pressure (FP).......................................................................................................................... 20
Minimum Flow Rate (FL) .................................................................................................................................. 21
Flow Rate Calibration (Fc)................................................................................................................................ 21
Auto-Refrigeration Temperature (AF)............................................................................................................... 22
Compressor Band (Cb) .................................................................................................................................... 22
Calibration Offset (c1) ...................................................................................................................................... 22
Baud Rate (PC) ................................................................................................................................................ 23
Display, Alarm and Error Messages.................................................................................................................... 24
Enabling / Disabling the Local Lockout .............................................................................................................. 26

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Routine Maintenance and Troubleshooting ....................................................................................................... 27
Routine Maintenance ........................................................................................................................................... 27
Condenser, Air Vents and Reusable Filter....................................................................................................... 27
Fluid Filter......................................................................................................................................................... 27
Fluid Level ........................................................................................................................................................ 27
Cleaning ........................................................................................................................................................... 27
Temperature Calibration................................................................................................................................... 27
Troubleshooting ................................................................................................................................................... 28
Diagnostic Mode .................................................................................................................................................. 29
Technical Information ........................................................................................................................................... 30
Controller Specifications ...................................................................................................................................... 30
Performance Specifications – DCA200 Chillers .................................................................................................. 30
Electrical Specifications – DCA200 Chillers ........................................................................................................ 31
Performance Specifications – DCA300 & DCW300 Chillers ............................................................................... 32
Electrical Specifications – DCA300 & DCW300 Chillers ..................................................................................... 33
Pump Performance .............................................................................................................................................. 35
RS-232 / RS-485 Communications....................................................................................................................... 36
Equipment Disposal (WEEE Directive)................................................................................................................ 37
Service and Technical Support............................................................................................................................ 37
PolyScience Chiller Fluids.................................................................................................................................... 38
Warranty................................................................................................................................................................. 38
Appendix ................................................................................................................................................................ 39
Flow Diagram – Air-Cooled Chillers..................................................................................................................... 39
Flow Diagram – Water-Cooled Chillers................................................................................................................ 40
Wiring Diagram – 208-230V, 1 Phase Air-Cooled Chillers .................................................................................. 41
Wiring Diagram – 208-230V, 380-460V 3 Phase Air- and Water-Cooled Chillers .............................................. 42

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Introduction
DuraChill Chillers provide cooling power for demanding applications and serve as an economical alternative to tap
water cooling systems. All models feature a microprocessor-based controller, digital Temperature Display (°C or
°F), one-touch set point display, and digital Pressure/Flow Rate Display (PSI, kPa, GPM, LPM) with push-Button
selection. To optimize cooling efficiency and performance, these sophisticated Chillers also feature a modulated
refrigeration system. As a result, temperature stability is greatly enhanced and compressor life extended.
Standard and Optional Features
The PolyScience DuraChill line of industrial Chillers offers exceptional performance, reliability, and operational
simplicity. Available in both air- and water-cooled models, these robust self-contained Chillers are engineered to
provide accurate temperature control in a wide range of process cooling applications. These powerful Chillers can
be configured with a wide variety of standard and optional features, including:
Standard Features
• Process temperature: 41 to 95 F (5 to 35 C)
• Ambient temperature: 60 to 95 F (16 to 35 C)
• Temperature stability: 0.9 F ( 0.5 C)
• Accurate microprocessor control with a digital LED readout
• RS-232 communications interface
• Remote On / Off control (dry contact)
• Pump protection by means of a Full Flow Bypass Valve
• Compressor protection through refrigerant pressure cutouts
• Process protection provided by over-temp/under-temp alarms
• Heavy-duty, locking casters provide easy maneuverability
• Power phase monitor
Optional Features
Higher-output Centrifugal and Turbine pumps
Ambient temperatures to 104°F (40°C)
Other process temperatures 5° to 185°F (-15° to 85°C)
Process shutoff valves
RS-485 interface
Remote temperature control probe
Stainless steel reservoir
Audible and Visual Alarms
Rail or foot mounting
Tank low level indicator/alarm
External water filter (side stream)
DI compatible process piping
Heaters
Auto water makeup valve
A Configuration Data Sheet showing how your Chiller is equipped is included with the manual if applicable for
optional features.

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General Safety Information
When installed, operated, and maintained according to the directions in this manual and common safety
procedures, your Chiller should provide safe and reliable temperature control. Please ensure that all individuals
involved in the installation, operation, or maintenance of this Chiller read this manual thoroughly prior to working
with the unit.
This symbol alerts you to wide range of potential dangers.
This symbol advises you of danger from electricity or electric shock.
This symbol indicates that a hot surface may be present.
This symbol marks information that is particularly important.
This symbol indicates alternating current.
/These symbols on the Power Switch indicate that they place the main power supply ON / OFF.
This symbol on the Power Switch indicates that it places the unit in a standby mode. It DOES NOT fully
disconnect the unit from the power supply.
Read all instructions pertaining to safety, set-up, and operation.
Proper operation and maintenance is the user’s responsibility.
Safety Recommendations
It is the user’s responsibility to read and understand all instructions and safety precautions included in this manual
prior to installing or operating this equipment. Contact our Customer Service Department with any questions
regarding the operation of this Chiller or the information contained in this manual.
WARNING: All warning labels should be carefully observed. Never remove or obstruct a warning label.
WARNING: Installation, operation, or maintenance of this equipment should be performed in strict
accordance with the instructions outlined in this manual. Failure to follow those instructions may increase
the risk of personal injury, damage the equipment, and/or void the warranty.

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WARNING: Be sure to remove power from the equipment, reclaim the refrigeration charge, and relieve
any residual pressure before cutting into the refrigeration system.
WARNING: Do not attempt to operate leaking or damaged equipment.
WARNING: Service should only be performed by fully qualified personnel. Extreme caution is required as
hazards are present when servicing this equipment.
WARNING: Do not attempt to override the power interlock switch or any other safety feature on this
equipment.
WARNING: Disconnect electrical power before moving unit. Keep unit upright when moving. Always
follow your company’s procedures and practices regarding safe lifting and relocation of heavy objects.
WARNING: Make sure the equipment’s main power switch is in the OFF position before connecting or
disconnecting power. Follow all applicable electrical and safety codes and procedures when connecting
power to the unit. Electrical connections should be made by an authorized electrical installer.
WARNING: This equipment must be properly filled with cooling fluid before use and properly drained
before moving or service.
WARNING: Use only fluids that comply with safety, health, and equipment compatibility requirements.
Read the safety data sheet for the fluid being used carefully before use.
CAUTION: Always operate this equipment within the stated design specifications.

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Regulatory Compliance and Testing
CE
EC Low Voltage Directive 2006/95/EC
EC Electromagnetic Compatibility Directive 2004/108/EC
IEC 61010-1-2001
IEC 61326:2005 / EN 61326 : 2006
Unpacking
Your Chiller is shipped in a special container. Retain the container and all packing materials until the unit is
completely assembled and working properly. Set up and run the unit immediately to confirm proper operation. If
the unit is damaged or does not operate properly, contact the transportation company, file a damage claim and
contact the company where your unit was purchased immediately.
Contents
• Recirculating Chiller
• Operator’s Manual
• Two sets of Inlet/Outlet Adapters, 0.75 inch male NPT

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Controls and Components
Control Panel
Front View
Reservoir Plate Covert
Pressure / Flow
Rate Display
Pressure / Flow
Rate Units
Unit / Menu Select Button
Tem
p
erature Dis
p
la
y
Select / Set Knob
Power Button
Temperature Units
Control Panel
Air Filter Access
(air-cooled
models only)
Reservoir Sight
Glass Port
(side of unit)

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Rear View
Power Switch
Power Switch

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Installation and Startup
WARNING: Be sure all power is OFF before proceeding.
Site Requirements
Ambient Temperature and Relative Humidity
The Chiller is designed for indoor installation in ambient temperatures between 5° and 30°C (41° and 86°F);
relative humidity should not exceed 80% (non-condensing).
Location
The Chiller should be installed on a strong, level surface. It should be located as close to possible to the process
requiring cooling. It should not be installed closer than 4 feet (1.4 meters) to a heat-generating source, such as
heating pipes, boilers, etc. If possible, the Chiller should be located near a suitable drain to prevent flooding in the
event of leaks. Do not place it where corrosive fumes, excessive moisture, excessive dust, or high room
temperatures are present.
For ease of positioning and maneuverability, the Chiller is supplied with casters. The front wheels can be locked
to keep the Chiller in place while in use.
To help prevent voltage drops, position the Chiller as close as possible to the power distribution panel. Avoid
voltage drops by using a properly grounded power source wired to meet electrical data plate requirements. The
use of an extension cord is not recommended.
NOTE: The Chiller may be located at a level below that of the equipment being cooled. As long as the
process remains closed, overflow will not occur when adding cooling fluid to the Chiller reservoir.
Clearance
Adequate clearance should be allowed on the front, sides, and rear of the Chiller for access to connections and
components. The front and rear vents of the Chiller must be a minimum of 24 inches (61 cm) away from walls or
vertical surfaces so air flow is not restricted.

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External Piping
WARNING: All facility water connections must be made by a licensed plumber.
General Considerations
To maintain a safe workplace and avoid leaks, special care should be taken when choosing hoses and
connectors for the Chiller. It is the user’s responsibility to ensure that the tubing and fittings connected to the
Chiller are compatible with the fluid, temperature, and pressure being used.
• Take care when selecting hoses and connections for the Chiller. All external piping, tubing, or hoses should
be run full size to limit the potential for external pressure drops. The use of quick-connect fittings is not
recommended, as they can cause substantial pressure drops.
• Materials of construction should be compatible with the fluid being used as well as the temperature and
pressure at which the unit will operate.
• Where applicable, always use a back-up wrench when making piping connections to the Chiller.
• Pressure Ratings – Hoses should be able to withstand the highest pressure that they will encounter (20 psi /
1.4 bar for centrifugal pumps; 100 psi / 6.9 bar for turbine pumps).
• Flexible Tubing – Avoid tubing that will expand and increase fluid volume when operating at the desired
pressure.
• Hose Diameter – The fittings on the Chiller’s process fluid lines are female 0.75 in NPT. The facility water
fluid inlets and outlets on water-cooled models are female 0.75 inch NPT.
• Facility Water (water-cooled models only) – Should be clean and well maintained. Ideally, the facility water
should be tested monthly to ensure a pH level between 7.2 and 7.8. Add algaecide if algae growth is
present.

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Process Fluid Connections
The Chiller has two internally threaded (0.75 inch ID NPT) fittings on the rear of the instrument housing for the
process water connections. Two sets of adapters for 0.75 inch hose are supplied with the unit for connecting
these fittings to the process piping.
Connect the Chiller’s inlet and outlet to the external apparatus with hoses or pipes. The direction of the flow
through the system can be controlled by the way the connections are made. Fluid is drawn into the Chiller through
the “Inlet” connection; fluid is pumped out of the Chiller through the “Outlet” connection.
NOTE: When Chillers with the standard magnetic drive centrifugal pump are connected to an external
apparatus with a built-in shutoff, an external bypass loop assembly (Part No. 510-147) may be needed if
operating below 20°C (68°F). This bypass assembly continues flow circulation to and from the pump even
though the main flow to the external apparatus has been blocked.
Facility Water Connections
WARNING: The incoming cooling water pressure should be 20 psi / 1.4 bar minimum and 150 psi / 10.3 bar
maximum.
Water-cooled Chillers have two internally threaded (0.75 inch ID NPT) on the rear of the instrument housing for
the facility water connections. The cooling water supply should be connected to the facility water inlet on the
Chiller. The facility water outlet on the Chiller should be connected to the appropriate return or drain, as required.
The cooling water supply may be from city tap water or a cooling tower. The incoming water pressure should be
between 20 and 40 psi / 1.4 and 2.8 bar.
Reservoir Drain
A 0.75 inch NPT connection is provided for the reservoir’s gravity drain. It should be piped to a drain or receptacle
positioned below the bottom of the reservoir. If a receptacle is used, be sure it is of sufficient volume to hold all
the coolant in the reservoir, process, and process lines.
Full Flow Bypass
This allows the operator to adjust the maximum operating pressure to the process. For low pressure pumps, the
pressure range is 7 to 35 psi (0.5 to 2.4 bar). For high pressure pumps, the pressure range is 30 to 100 psi (2.1 to
6.9 bar). The Full Flow Bypass is located just above the pump.
NOTE: The Full Flow Bypass also protects the pump when running continuously under dead head
conditions caused by a blockage in the process or process lines.
Adjusting the Full Flow Bypass Pressure Setting
WARNING: Hazardous voltages are present.
The pressure setting on the Full Flow Bypass is adjusted as follows:
1. Set the minimum allowable flow rate to 0 (see Normal Operation, Setting Operational Parameters / Limits,
Minimum Flow Rate).
2. Completely block the flow from the Chiller’s fluid outlet. This should cause the pressure to rise.

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3. Set the Pressure / Flow Rate Display to read in either PSI or kPa (see Normal Operation, Selecting the
Pressure / Flow Rate Display and Units).
4. Remove the insulation covering the pressure regulating valve cap and then remove the cap. There may
be some coolant in the cap; this is normal.
5. Loosen the locknut and then using a flat blade screwdriver, adjust the pressure until the reading on the
Pressure / Flow Rate Display matches the desired maximum operating pressure. A clockwise rotation
increases pressure; a counter-clockwise rotation decreases pressure.
6. Set the minimum allowable flow rate to the desired value.
7. Tighten the locknut and replace the cap and insulation.
8. Set the Pressure / Flow Rate Display to the preferred reading (GPM, LPM, PSI, kPa).
Locknut

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Process Coolant
Suitable Fluids
WARNING: Use only fluids that comply with safety, health, and equipment compatibility requirements. Read
the safety data sheet for the fluid being used carefully before use.
The Chiller is designed to accommodate a variety of coolant fluids (water, glycol mixtures, etc). For most
applications above 15°C (59°F), distilled water is satisfactory. For operation below 15°C (59°F), the Chiller must
be protected with an antifreeze solution. Ethylene glycol (laboratory grade) and water in a 50/50 mixture is
satisfactory from +15° to -15°C (59° to 5°F). Select a fluid that is compatible with the Chiller’s wetted parts (brass,
bronze, stainless steel, EPDM rubber, nylon, PVC).
WARNING: Do not use caustic, corrosive, or flammable fluids.
CAUTION: Operation below 15°C (59°F) requires antifreeze in the circulation fluid. DO NOT use automotive
antifreeze as the additives may be harmful to the Chiller’s wetted parts.
DO NOT USE the following fluids:
• Automotive antifreeze with additives**
• Hard tap water**
• Deionized water with a specific resistance > 1 meg ohm (except units with the DI water compatible
plumbing
• Any flammable fluids
• Concentrations of acids or bases
• Solutions with halides: chlorides, fluorides, bromides, iodides or sulfur
• Bleach (Sodium Hypochlorite)
• Solutions with chromates or chromium salts
• Glycerin
• Syltherm fluids
** At temperatures above 40°C, additives or mineral deposits can adhere to the heater. If deposits are
allowed to build up, the heater may overheat and fail. Higher temperatures and higher concentrations of
additives can hasten deposit build up.

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Electrical Power
WARNING: Make sure the main power switch is in the OFF position before connecting or disconnecting
electrical power from the unit. Follow all applicable electrical and safety codes and procedures when
connecting power to the unit. Electrical connections should be made by an authorized electrical installer.
WARNING:
Make certain that the electrical supply is the same voltage and frequency as your unit (see identification
label).
Make sure electrical connections comply with all applicable electrical codes.
Ground the Chiller in accordance with NEC Article 250.
Operating voltage must be within 10% of the data plate rating.
Phase imbalance must be below 5%.
WARNING: DO NOT apply power to the Chiller until the unit is ready for Startup
CAUTION: DO NOT apply power to the Chiller until the Reservoir has been filled. When Controller power
is turned On, the pump automatically begins pumping. If the Reservoir has not been filled, the pump could
be damaged.
Use the voltage and amperage requirements specified on the identification label on the rear of the Chiller.
Remove the three screws securing the Chiller’s rear top panel and remove it. Remove the right side panel by
pushing up from the bottom to unhook the latching tabs. Remove the insulating cover over the electrical
compartment.
Bring properly sized power leads and ground from a fused disconnect to the unit. Use dual-element fuses in the
disconnect, sized according to National Electrical Code recommendations.
3 Phase Units: The Chiller is equipped with a phase monitor that prevents startup if phase sequence is incorrect.
It will also turn the Chiller OFF in the event of a loss of one phase and/or prevent Chiller operation if there is a
voltage mismatch between any two phases greater than 8%. Be sure to connect electrical lines in proper
sequence, i.e.: L1, L2, and L3.
You may want to verify that electrical power to the unit is ON before reinstalling the side and rear panels.
WARNING: DO NOT remove the ground wire while diagnosing any power supply problems.

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Optional Signal Inputs/Outputs
RS-232 / RS-485 Serial Output
This option allows you to remotely control the Chiller and/or output temperature readings to an external recorder
or other auxiliary device. The maximum communications distance for Chillers equipped with the RS232 option is
50 feet (15 meters). The maximum distance for units equipped with the RS485 option is 4000 feet (1200 meters).
A 9-pin D-connector is provided on the rear of the instrument enclosure for this connection.
Remote On / Off Port
This option allows you to connect a remote on/off switch or other remote control device to the Chiller. The Chiller
is ON when the contact is open; it is OFF when the contact is closed. A 10-ft (3 m) cord with 5-pin mating plug is
provided.
Alarm Output
This allows the operator to connect a remote alarm device to the Chiller. The alarm output consists of normally
open (NO) and normally closed (NC) contacts which are switched whenever an alarm, fault, or error condition is
detected or when the Chiller is OFF. A 10-ft (3 m) cord with 5-pin mating plug is provided.
Remote On / Off and Alarm Output

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Startup
Facility Water Flow (water-cooled units only)
1. Open the valves to the facility water supply and return.
2. Check for leaks.
Filling the Reservoir
1. Remove the reservoir cover plate (located on the top of the Chiller) and reservoir cap.
2. Using a funnel, add fluid until it is approximately 2 inches (5.1 cm) below top of reservoir.
3. Once the fluid level is about 2 inches (5.1 cm) below the top of the reservoir, remove the funnel but do not
replace the cap at this time.
Starting Process Fluid Flow
1. Place the Power Switch located on the rear panel of the Chiller in the ON position. The display on the front
panel will respond by showing standby (....). If there is no response, check that the unit is connected to
working electrical power and that Power Switch on the rear of the Chiller is in the ON position.
2. Press the Power Button on the front panel. The system startup sequence will begin and proceed as follows:
• The pump will turn on and fluid will begin circulating through the system.
• The set point temperature will appear briefly on the Temperature Display; after a few seconds, it will be
replaced by the actual fluid temperature.
• 15 to 20 seconds after power up, the compressor will begin operating.
3. Check for leaks.
4. With the pump running, the reservoir’s fluid level will drop as the process and/or process cooling lines fill
with fluid. Slowly add fluid to the reservoir until the liquid level remains stable.
5. Replace the reservoir cap and cover plate.

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Normal Operation
NOTE: The Chiller incorporates a special “lockout” feature that can be enabled to prevent unauthorized or
accidental set point and other operational changes. This feature is described in detail under “Enabling /
Disabling the Local Lockout.” It should not be enabled until all operational parameters have been set.
Selecting the Temperature Unit (°C or °F)
The LEDs adjacent to the Temperature Display indicate the unit (°C or °F) used for Temperature Displays.
To change from °C to °F or vice versa, proceed as follows:
To change to °F — Place the Power Switch on the rear of the instrument in the OFF position. Press and
hold the Units/Menu Select Button while returning the Power Switch to the ON position.
To change to °C — Place the Power Switch on the rear of the instrument in the OFF position. Press and
hold the Power Button on the front panel while returning the Power Switch to the ON position.
IMPORTANT: All user settings, except baud rate and calibration offset, return to the original factory defaults
when the temperature unit is changed. The Chiller’s temperature set point and various alarm settings should
be reset to the desired values.
Displaying and Adjusting the Set Point
Press the Select/Set Knob on the front panel. The current set point temperature will be displayed, and the decimal
point at the bottom right of the display will flash, indicating that the temperature can be changed.
Rotate the Select/Set Knob until the desired set point temperature is displayed. The setting is accepted after the
Select/Set Knob is pressed a second time or automatically after a few seconds of inactivity.
NOTE: Temperature set point cannot be changed when the local lockout is enabled. See “Enabling /
Disabling the Local Lockout” .
Unit / Menu
Select Button
Pressure / Flow Rate Units
Pressure / Flow
Rate Display
Temperature
Display
Temperature Units
Select / Set Knob
Power Button

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Selecting the Pressure / Flow Rate Display and Units
The Chiller can be set up to display either fluid pressure (in PSI or kPa) or flow rate (in GPM or LPM). Pressing
the Units/Menu Select Button briefly toggles through the available selections.
NOTE: The metric pressure reading displayed must be multiplied by 100 for the actual kPa value.
NOTE: The flow rate readout is intended as a reference only. If accurate flow readings are required, an
external flow meter is recommended.
Setting Operational Parameters / Limits
The Chiller’s various operational parameters, such as temperature, flow rate, and pressure alarm values, are all
user-adjustable. They are accessed by pressing and holding the Units/Menu Button until HL appears on the
Pressure/Flow Rate Display. Pressing and releasing the Units/Menu Button once HL appears allows you to scroll
through the various parameters; rotating the Select/Set Knob allows you to change the displayed setting. You can
accept the displayed value by either pressing the Select/Set Knob or allowing the display to timeout.
Operational parameter limit alarms will shut down the compressor, fan, pump, and heaters. Some temperature
values are only displayed and settable in ºC
NOTE: Some parameters listed may not be included in your version of software.
NOTE: The Ranges and Default Settings shown are for standard models. Ranges and Default Settings for
your unit may differ depending on the options selected.
Menu
Item Description Choices / Ranges Default Setting
HL
High Temperature Limit — Limits the maximum allowable
set point temperature. Audio and visual alarm indicators are
activated when the measured fluid temperature reaches the
HL temperature setting.
NOTE: EHL will appear on the display if the High Limit value
is set below the current set point.
68° to 104ºF
20° to 40 ºC
95°F
35 ºC
LL
Low Temperature Limit — Limits the minimum allowable set
point temperature. Audio and visual alarm indicators are
activated when the measured fluid temperature reaches the
LL temperature setting.
NOTE: ELL will appear on the display if the Low Limit value is
set above the current set point.
10° to 59°F
-12° to +15°C 0.0ºC

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Menu
Item Description Choices / Ranges Default Setting
HA
High Ambient Temperature Limit — Maximum ambient
temperature limit. Displayed and settable only in ºC. Should
the ambient temperature rise above the HA value, the audio
and visual alarms will activate and the compressor, heater,
fan, and pump will turn off.
NOTE: Chiller’s rated cooling capacity is dependent on an
ambient temperature of 20°C (68ºF). Performance will
decrease as the ambient temperature rises. Continuous
operation at ambient temperatures above 40ºC (104ºF) is not
recommended.
+30 to 45ºC
Note: Always displayed
and set in °C
40ºC
FP
Maximum Fluid Pressure — Maximum allowable fluid
pressure; settable in either PSI or kPa. Should the fluid
pressure rise above the maximum fluid pressure value, the
audio and visual alarms will activate and the compressor,
heater, fan, and pump will turn off.
NOTE: The Chiller also incorporates a built in pressure
regulated bypass valve. It will maintain a maximum outlet
pressure by diverting flow of the process fluid to the reservoir.
The bypass valve may be adjusted by the customer.
CAUTION: Maximum operating pressure for the Chiller is 100
PSI / 6.9 bar. Different pumps have different maximum
operating pressures.
10 to 100 PSI
69 to 690 kPa
(display value x 100)
80 PSI
5.5 x 100 =
550 kPa
FL
Minimum Flow Rate — Minimum allowable flow rate;
settable in either GPM or LPM. Should the fluid flow rate drop
below the minimum value, the audio and visual alarms will
activate, and the compressor, heater, fan, and pump will turn
off.
0 to 2 GPM
0 to 7.5 LPM
0.0 GPM
(0.2 GPM
optional)
0.0 LPM
(0.1 LPM
optional)
Fc Flow Rate Calibration — Allows adjustment of the displayed
flow rate to match that of a known standard. 0 to 99.9 gain Nominal flow
AF
Auto-Refrigeration Set Point — The upper temperature at
which the refrigeration system will activate; displayed and
settable in °C only. There will be no refrigeration or cooling at
set points above the AF setting.
No heater option
20° to 40°C
With heater option
20° to 50°C
No heater option
40°C
With heater
option
50°C
Cb
Compressor Band – The temperature at which the
compressor will turn off. This protects the fluid temperature
from dropping too low during periods of low or no heat load.
The compressor turns back on when the temperature rises
above the set point.
-06° to -03°C -06°C
°C Calibration Offset — Allows adjustment of the displayed
temperature to match that of an independent traceable
standard; displayed and settable in °C only.
±1.9°C 0.0°C
PC Communications Baud Rate — Selects the baud rate for
serial (RS232/RS485) communication. 24 (2400), 48 (4800), 96 (9600) or 192 (19200) 96