PolyScience DuraChill 58 Series User manual

User Guide
DuraChill Air- and Water-Cooled 1.5 HP Chillers
110-392
27 June 2016

110-392 1
Table of Contents
Introduction...............................................................................................................................................................3
General Safety Information .....................................................................................................................................3
Safety Recommendations .......................................................................................................................................3
Regulatory and Compliance Testing...................................................................................................................5
Contents.................................................................................................................................................................5
Controls and Components ......................................................................................................................................6
Control Panel.......................................................................................................................................................6
Front ....................................................................................................................................................................6
Rear -- 230V, 240V, and 208-230V Units ...........................................................................................................7
Rear -- 380V and 460V Units ..............................................................................................................................7
Quick Start.................................................................................................................................................................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
Reservoir Vent.................................................................................................................................................. 11
Process Coolant................................................................................................................................................... 12
Electrical Power ................................................................................................................................................... 13
Phase Requirements (if applicable) ................................................................................................................. 13
Optional Signal Inputs/Outputs ............................................................................................................................ 13
Ambient / External Temperature Probe............................................................................................................ 13
RS-232/RS-485 Serial Output .......................................................................................................................... 13
Remote On / Off Port........................................................................................................................................ 13
4-20mA Set Point Control................................................................................................................................. 13
Startup.................................................................................................................................................................. 14
Facility Water Flow (water-cooled units only)................................................................................................... 14
Filling the Reservoir.......................................................................................................................................... 14
Starting Process Fluid Flow.............................................................................................................................. 14
Normal Operation .................................................................................................................................................. 15
Selecting the Temperature Unit ........................................................................................................................... 15
Displaying and Adjusting the Set Point ................................................................................................................ 15
Selecting the Internal / External Temperature Display ........................................................................................ 15
Displaying and Adjusting the Ambient Tracking Offset........................................................................................ 16
Displaying and Adjusting the Remote Control Temperature ............................................................................... 16
Selecting the Pressure / Flow Rate Display and Units ........................................................................................ 16
Setting Operational Parameters / Limits .............................................................................................................. 17
Display, Alarm and Error Messages .................................................................................................................... 20
Adjusting the High Pressure Bypass Setting ..................................................................................................... 22
Enabling / Disabling the Local Lockout .............................................................................................................. 22
Over-Temperature Protection............................................................................................................................... 23
Routine Maintenance............................................................................................................................................. 24
Routine Maintenance ........................................................................................................................................... 24
Condenser, Air Vents and Reusable Filter....................................................................................................... 24
Inline Strainer ................................................................................................................................................... 24

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Fluid Level ........................................................................................................................................................ 24
Cleaning ........................................................................................................................................................... 24
Temperature Calibration ....................................................................................................................................... 25
Internal Calibration Offset (c1) ............................................................................................................................. 25
External Calibration Offset (c2)............................................................................................................................ 25
Flow Rate Calibration (Fc) .................................................................................................................................... 26
Fuse Bits (Fb)......................................................................................................................................................... 26
Troubleshooting .................................................................................................................................................... 27
Diagnostic Mode .................................................................................................................................................. 28
Technical Information ........................................................................................................................................... 29
Controller Specifications ...................................................................................................................................... 29
Performance Specifications ................................................................................................................................. 29
Electrical Specifications ....................................................................................................................................... 30
Pump Performance .............................................................................................................................................. 31
RS-232 / RS-485 Communications ....................................................................................................................... 32
Certificate of Compliance ..................................................................................................................................... 33
Equipment Disposal (WEEE Directive)................................................................................................................ 33
Service and Technical Support ............................................................................................................................ 33
Replacement Parts .............................................................................................................................................. 34
Pumps .................................................................................................................................................................. 35
Warranty ................................................................................................................................................................. 36
Appendix ................................................................................................................................................................ 37
Flow Schematic - All Models................................................................................................................................ 37
Electrical Diagram – 208-230V / 1PH / 50-60 Hz Models without heater option ................................................. 38
Electrical Diagram – 208-230V / 1PH / 50-60Hz Models with heater option ....................................................... 39
Electrical Diagram – 208-230V and 380-460V / 3PH / 50-60Hz Models without heater option .......................... 40
Electrical Diagram - 208-230V and 380-460V / 3 PH / 50-60Hz Models with heater option ............................... 41
Options................................................................................................................................................................. 42
General Options Wiring .................................................................................................................................... 42
RS-485 Communications Wiring ...................................................................................................................... 42
DI Control Wiring .............................................................................................................................................. 43
H2 & H3 Option Wiring ..................................................................................................................................... 43
4-20 mA Set Point Control................................................................................................................................ 44
..............

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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.
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 a wide range of potential dangers. When attached to the unit, consult the operator's
manual.
This symbol advises 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 / Circuit Breaker indicate that they place the main power supply ON / OFF.
This symbol on the Power Key (if present) 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: 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: Always operate the unit within the stated temperature and pressure design specifications.
WARNING: All warning labels should be carefully observed. Never remove or obstruct a warning label.
WARNING: Units which use cooling fluid must be properly filled before use and properly drained before
moving or service. Allow reservoir fluid to return to ambient temperature before draining. Be sure to follow
your organization's procedures and practices regarding the safe lifting and relocation of heavy objects.
For items weighing 18 kg or more, safe practice lifting should be performed by at least two people.
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 operate leaking or damaged equipment.
CAUTION: Be sure to follow all appropriate safety and environmental guidelines when collecting and
disposing of spent coolant.
WARNING:
Do not plug unit into the electrical outlet until it is ready for startup.
Always connect the power cord on this unit to a grounded power outlet. Make certain that the outlet is the
same voltage and frequency as your unit (see identification label). Never operate the unit with a damaged
power cord.
Always turn the unit OFF and disconnect mains power before performing any maintenance or service as
hazardous voltages exist within chassis components.
WARNING: Make sure the equipment's 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: Disconnect electrical power before moving the unit. Keep unit upright when moving. Follow
your company's procedures and practices regarding the safe lifting and relocation of heavy objects. For
items weighing 18 kg or more, safe practice lifting should be performed by at least two people.

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Regulatory and Compliance Testing
Canada USA (60Hz) units
CAN/CSA C22.2 No. 61010-1-12 – Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory
Use, Part I: General Requirements.
CAN/CSA C22.2 No. 61010-2-010-04 (R2014) – Safety Requirements for Electrical Equipment for Measurement, Control
and Laboratory Use – Part 2-010: Particular Requirements for Laboratory Equipment for the Heating of Materials.
UL Std No. 61010-1 (2012) – Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use –
Part 1: General Requirements.
UL Std No. 61010-2-010 (2015) – Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory
Use – Part 2-010: Particular Requirements for Laboratory Equipment for the Heating of Materials.
CE (50Hz units)
Machinery Directive 2006/42/EC
EC Electromagnetic Compatibility Directive 2014/30/EU
IEC 61010-1 / EN 61010-1:2010
IEC 61010-2-010 / EN 61010-2-010:2014
IEC 61326:2012 / EN 61326:2013
RoHS Directive 2011/65/EU
Australia/New Zealand (50 Hz)
ACMA – Radiocommunications (Electromagnetic Compatibility) Standard 2008 EN 61326-1:2013
EAC Customs Union (50 Hz)
TP TC 010/2011 On Safety of Machinery and Equipment
TP TC 004/2011 On Safety of Low Voltage Equipment
TP TC/020/2011 Electromagnetic Compatibility of Technical Equipment
Highly Accelerated Life Test (HALT) and Vibration Tests per ASTM D4169-8 (All units)
Contents
The following items have been included with your Chiller:
•Operator’s Manual
•Two sets of Inlet/Outlet Adapters: ½ inch male NPT x ½ inch hose barb and ½ inch male NPT x 5/8 inch hose
barb (select models)

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Controls and Components
Control Panel
Front
Reservoir Cap
Pressure / Flow
Rate Display
Pressure / Flow
Rate Units
Unit / Menu Select Button
Air Filter
Temperature Display
Select / Set Knob
Power Button
Temperature Units
Control Panel
Bypass Valve Access Panel
Air Filter Access
Ambient / External
Temperature Tracking
Probe
Connection
(optional)

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Rear – 230V, 240V, and 208-230V Units
Rear – 380V and 460V Units
Communications Port (optional)
RS-232 Port (optional)
Remote Temperature
Probe Port (optional)
Power Switch / Circuit Breaker
Reservoir Vent
(Vent Assembly required
on 5XXX models)
Fluid Inlet (from process)
Fluid Outlet (to process)
Facility Water Outlet
(water
-cool models)
Facility Water Inlet
(water-
cooled models)
Reservoir Drain
Over-Temperature
Protection Adjust
(5XXX models only)
Over-Temperature Protection
Reset (5XXX models only)
Vent Assembly
(supplied with
5XXX models)
Electrical Connections
Junction Box
Power Switch

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Quick Start
See Installation & Startup for additional information.
1
All units:
Connect process lines
Water-cooled units:
A. Connect process lines
B. Connect facility water lines
C. Turn facility water ON
2 Fill reservoir with coolant
3 Connect electrical power to
Mains
4 Turn Power Switch / Circuit
Breaker ON
5 Turn Controller ON
6 Add coolant to reservoir as
process lines fill
7 Enter temperature set point

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Installation and Startup
Site Requirements
Ambient Temperature and Relative Humidity
The Chiller is designed for indoor installation in ambient temperatures between 16° and 35°C (60° and 95°F);
relative humidity should not exceed 80% (non-condensing).
Location
Install the Chiller on a strong, level surface 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. If possible, the unit 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.
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 unit 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 unit's reservoir.
Clearance
Allow adequate clearance 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
General Considerations
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.
•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 (100 psi
/ 6.9 bar).
•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 0.5 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.
Facility Water Outlet
Facility Water Inlet
Reservoir Drain
Reservoir Vent
(shown with Vent
Assembly for
5XXX models))
Process Fluid Inlet
Process Fluid Outlet

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Process Fluid Connections
The Chiller has two internally threaded fittings on the rear of the instrument housing for the process water
connections. Two sets of adapters are supplied with the unit for connecting these fittings to the process piping.
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: On units requiring facility water, those connections must be made by a licensed plumber.
CAUTION:
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 fittings 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 150 psi / 1.4 and 10.3 bar.
Reservoir Drain
A connection is provided for the reservoir’s gravity drain.
Reservoir Vent
A reservoir vent assembly is provided with Chillers equipped with the heater option to relieve pressure within the
reservoir as coolant heats and expands. A connection is provided on the rear of the Chiller for the vent assembly.

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Process Coolant
Suitable Fluids
WARNING: For units that use cooling fluids.
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: DO NOT USE
Caustic, corrosive, or flammable liquids
Automotive anti-freeze*
Hard tap water*
Deionized water with a specific resistance >1 meg ohm
Concentrations of acids or bases
Solutions with halides: chlorides, fluorides, bromides, iodides, or sulfur
Chlorine bleach
Glycerine
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 will hasten mineral
deposits
The Chiller can accommodate a variety of coolant fluids (water, glycol mixtures, etc). For most applications above 20°C (68°F),
distilled water is satisfactory. For operation below 20°C (68°F), the Chiller must be protected with an antifreeze solution.
Ethylene glycol (laboratory grade) and water in a 50/50 mixture is satisfactory from +20° to -15°C (68° to 5°F). Select a fluid
that is compatible with the Chiller’s wetted parts (brass, bronze, stainless steel, EPDM rubber, nylon, PVC).
WARNING: Operation below 20°C (68°F) requires antifreeze in the circulation fluid. Do not use automotive
antifreeze as the additives may be harmful to the Chiller's wetted parts.

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Electrical Power
WARNING:
Do not plug unit into the electrical outlet until it is ready for startup.
Always connect the power cord on this unit to a grounded power outlet. Make certain that the outlet is the
same voltage and frequency as your unit (see identification label). Never operate the unit with a damaged
power cord.
Always turn the unit OFF and disconnect mains power before performing any maintenance or service as
hazardous voltages exist within chassis components.
WARNING: Make sure the equipment's 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: DO NOT apply power until the unit is ready for Startup.
Connect the power cord (if) supplied with the Chiller to an appropriate electrical outlet.
Phase Requirements (if applicable)
For 3-phase units, be sure to connect in proper sequence, ie.: L1, L2, and L3. These Chillers are designed with a
junction box on the rear of the unit to which you can connect the electrical power supply conduit. Be sure to
provide suitable conduit strain relief and grounding.
3-phase units are equipped with a phase monitor that prevents startup if phase sequence is incorrect. The Chiller
will turn OFF in the event of a loss of one phase and/or prevent operation if there is a voltage mismatch between
any two phases greater than 8%.
Optional Signal Inputs/Outputs
Ambient / External Temperature Probe
Allows control of the cooling fluid temperature using an external temperature measurement (ambient
room/machine temperature or process temperature). A 9-pin connector is provided for connecting the
ambient/external tracking probe.
NOTE: In order for the Chiller to properly recognize the presence of the external temperature probe, the
probe must be connected to the unit before power is applied..
RS-232 / RS-485 Serial Output
Allows remote control the Chiller and/or the output of temperature readings to an external 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 for this connection.
Remote On / Off Port
Allows the connection of a remote On/Off switch or other remote control device to the Chiller. A 15-pin D-
connector is provided on the rear of the instrument enclosure for this connection.
4-20mA Set Point Control
Allows set point changes using a customer supplied current value. A 15-pin D-connector or 8-pin circular
connector is provided for this connection.

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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 cap located on the top of the Chiller and, using a funnel, add fluid until it is
approximately 2 inches (5.1 cm) below top of reservoir.
2. 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 circuit breaker located on the rear panel of the Chiller to 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 circuit breaker 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.
NOTE: When adding fluid to the unit for the first time, prime the pump by pressing the Power Button to turn
power ON, letting the Chiller run for 3 seconds, and the pressing the Power Button again to turn power OFF.
Repeat this ON and OFF procedure three times.
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.

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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 and
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 Circuit Breaker/Power Switch on the rear of the instrument in the OFF
position. Press and hold the Units/Menu Select Button while returning the Circuit Breaker/Power Switch
to the ON position.
To change to °C — Place the Circuit Breaker/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 Circuit Breaker/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 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 or remote temperature
control is installed and enabled. It allows the user to check or continuously display either the Chiller's internal
outlet fluid temperature or the external ambient/process temperature.
Selecting the Internal / External Temperature Display
NOTE: This section applies only when the ambient tracking probe or remote temperature control is installed
and enabled. It allows the user to check or continuously display either the Chiller's internal outlet fluid
temperature or the external ambient/process temperature.
When the ambient tracking probe is selected (AtC), the Chiller normally displays the internal outlet fluid
temperature. To display the external ambient temperature, press and release the Units/Menu Select Button until
P2 appears on the Pressure/Flow Rate Display.
When the remote temperature control probe is selected (rPC), the Chiller normally displays the external process
temperature. To display the internal outlet fluid temperature, press and release the Units/Menu Select Button until
P1 appears on the Pressure/Flow Rate Display.
NOTE: P1 or P2 will remain on the pressure/flow rate display until the Units/Menu Select button is pressed
and released. The displayed temperature will revert to the default condition (internal temperature for the
ambient probe, external temperature for the remote temperature control probe).

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Displaying and Adjusting the Ambient Tracking Offset
NOTE: Ambient tracking is an optional function that may or may not be available on your Chiller. It permits
you to control fluid temperature based on room or machine temperature plus or minus a user-adjustable
offset temperature.
When the optional ambient tracking probe is installed and enabled (AtC), the ambient tracking offset rather than
the set point temperature is displayed when the Select/Set Knob on the front panel is pressed.
To change the displayed offset value, rotate the Select/Set Knob until the desired offset value is displayed. An
offset value from -5.0°C to +5.0°C (-9.0° to +9.0°F) may be entered. The setting is accepted after the Select/Set
Knob is pressed a second time or automatically after a few seconds of inactivity.
Displaying and Adjusting the Remote Control Temperature
NOTE: Remote temperature control is an optional function that may or may not be available on your Chiller.
It permits you to control cooling based on the temperature of the external process.
When the optional remote control external probe is installed and enabled (rP), the external temperature set point
is displayed when the Select/Set Knob on the front panel is pressed.
To change the external temperature set point, press and then 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.
Selecting the Pressure / Flow Rate Display and Units
The Chiller can set 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: Metric pressure reading output is displayed in kPA and must be multiplied by 100 for Pa.
NOTE: The flow rate readout is intended as a reference only. If accurate flow readings are required, an
external flow meter is recommended.

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Setting Operational Parameters / Limits
Various operational parameters are 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.
Units without heater
option (6xxx ) =
+20 to 40 ºC
(68 to 104ºF)
Units with heater option
(5xxxx) = +20 to 95 ºC
(68 to 203ºF)
6xxx = 40 ºC
5xxx = 95 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.
0.0 to +15 ºC
(32 to 59 ºF) 5.0ºC
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 50ºC 40 ºC

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Menu Item Description Choices / Ranges Default Setting
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.
20 to 100 PSI
13 to 680 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 and 1.5 to 3 GPM
0 and 6 to 11 LPM
1.5 GPM
6.0 LPM
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.
+20° to 40°C 35°C
Sd
Maximum External / Internal Temperature Differential
(optional) — Establishes the cooling/heating rate when the
remote temperature control probe is installed and enabled.
4° to 20°C 5°C
rP
Ambient Tracking / Remote Probe (optional)
AtC — Ambient tracking probe enabled. Chiller controls
fluid temperature based on room or machine temperature
(wherever the ambient tracking probe is located) plus or
minus a user-set offset (±5.0°C / ±9.0°F).
rPC — Remote probe enabled. Chiller controls fluid
temperature based on the process fluid temperature at an
external location.
nO — Ambient tracking / remote probe disabled.
nRP — Ambient tracking probe not installed.
Dependent on option and
software installed. nAP
C1 / C2
Calibration Offset — Allows adjustment of the displayed
temperature to match that of an independent traceable
standard; displayed and settable in °C only.
C1 — Internal calibration offset
C2 — External calibration offset
±2.9°C 0.0°C
Fc Flow Rate Calibration — Allows adjustment of the
displayed flow rate to match that of a known standard.
Note value here for
reference/replacement of
PCB or flow sensor
Varies