PolyScience Refrigerated Recirculating Chillers User manual

Operators Manual
Refrigerated Recirculating Chillers
110-240 Rev. H
06/06

2
EC Declaration of Conformity
The Products herewith complies with the requirements, as stated below, in accordance to the EC Low Voltage
Directive 73/23/EEC and EC Electromagnetic Compatibility Directive 89/336/EEC, and carries the marking
accordingly.
We herewith declare: PolyScience
Division of Preston Industries, Inc.
6600 West Touhy Avenue
P.O. Box 48312
Niles, Illinois 60714, USA
That the following equipment complies with the essential requirements in respect to safety and health, in
accordance to the EC Directives based on its design and type, as brought into circulation by us. In case of
alteration of the equipment, not agreed upon by us, this will lose its validity.
Product Description: Refrigerated Chillers
6206, 6306, 6506, 6706, 6106, 5206, 5306, 5706, 5106; 1171, 1173, 1175,
1177, 1179, 512CR, 517CR
Low Voltage Directive 73/23/EEC & Electromagnetic Compatibility
89/336/EEC and relevant transpositions into national law of the
member states, including, but not limited to the following
Harmonized Standards:
EN/IEC 61010-1: 2001
EN/IEC 61010-2
EN 61326: 1997 +A1: 1998 + A2:2001
CISPR 11/EN 55011 Class A, Group I
Testing Bodies: CSA International (Certification & Testing Division)
D.L.S. Electronic Systems Inc. ( EMC approval)
Signature on Behalf of
Manufacturer or Authorized
Representative:
Date of Validity:
Title of Signatory:
Brian Klotz
October 18, 2005
Engineering Manager
110-266 Rev. D 10/05

3
WEEE Directive
A label with a crossed-out wheeled bin symbol and a rectangular bar indicates that the product
is covered by the Waste Electrical and Electronic Equipment (WEEE) Directive and is not to
be disposed of as unsorted municipal waste.
Any products marked with this symbol must be collected separately, according to the
regulatory guidelines in your area.
or
The objectives of this program are to preserve, protect and improve the quality of the
environment, protect human health, and utilize natural resources prudently and rationally.
Specific treatment of WEEE is indispensable in order to avoid the dispersion of pollutants into
the recycled material or waste stream. Such treatment is the most effective means of protecting
the customer’s environment.
Requirements for waste collection, reuse, recycling, and recovery programs vary by regulatory
authority at your location.
Contact your local responsible body (e.g., your laboratory manager) or authorized
representative for information regarding applicable disposal regulations.
Contact PolyScience at the web site listed below for information.
Web address: www.polyscience.com
Customer Care: 1-800-229-7569 (inside the USA)
([phone] (outside the USA)
Fax [phone]

4
Table of Contents
Section 1 - General Information
1.1 Warranty
1.2 Unpacking
Section 2 – O er iew
2.1 Contents
2.2 Description
2.3 Chiller Specifications and Pump Performance
Section 3 – Installation and Startup
3.1 Site Requirements
3.2 Electrical Power
3.3 Optional Signal Inputs/Outputs
3.4 Plumbing
3.5 Closed System or Cooling Coil Setup
3.6 Open Bath System Setup
3.7 Startup
Section 4 – Operation
4.1 Selecting the Temperature Unit (°C or °F)
4.2 Displaying and Adjusting the Set Point
4.3 Displaying and Adjusting the Ambient Tracking Offset
4.4 Displaying and Adjusting Remote Control Temperature
4.5 Selecting the Pressure / Flow Rate Display and Units
4.6 Selecting Internal/External Temperature Display
4.7 Setting Operational Parameters
4.8 Display, Alarm, and Error Messages
4.9 Adjusting the High Pressure Bypass Setting
4.10 Enabling/Disabling the Local Lockout
Section 5 – Maintenance and Calibration
5.1 Standard Magnetic Drive Centrifugal Pump
5.2 Condenser, Air Vents, and Reusable Filter
5.3 Fluid Filter
5.4 Fluid Level
5.5 Temperature Calibration
5.6 Flow Rate Calibration
Section 6 - Troubleshooting
6.1 Unit Will Not Operate (No Cooling or Pumping)
6.2 No Pumping
6.3 Insufficient Pumping
6.4 No Cooling or Insufficient Cooling
6.5 Triac Failure
6.6 Internal Probe Failure
6.7 External Temperature Probe Failure
6.8 Diagnostic Mode
Section 7 - Ser ice and Technical Support
7.1 Electrical Wiring Diagram
7.2 Process Flow Diagram
Section 8 - Replacement Parts
Section 9 – RS232

5
Section 1 - General Information
1.1 Warranty
Thank you for purchasing this chiller. We are confident it will serve you for a long time. Our
warranty to you is as follows:
The manufacturer agrees to correct for the original user of this product, either by repair, or at the
manufacturer's election, by replacement, any defect that develops after delivery of this product within
the period as stated on the warranty card. In the event of replacement, the replacement unit will be
warranted for 90 days or warranted for the remainder of the original unit’s parts or labor warranty
period, whichever is longer.
If this product requires service, contact the manufacturer/supplier's office for instructions. When
return of the product is necessary, a return authorization number will be assigned and the product
should be shipped, transportation charges pre-paid, to the indicated service center. To insure
prompt handling, the return authorization number should be placed on the outside of the package
and a detailed explanation of the defect enclosed with the item.
This warranty shall not apply if the defect or malfunction was caused by accident, neglect,
unreasonable use, improper service, or other causes not arising out of defects in material or
workmanship. There are no warranties, expressed or implied, including, but not limited to, those of
merchantability or fitness for a particular purpose which extends beyond the description and period
set forth herein.
The manufacturer's sole obligation under this warranty is limited to the repair or replacement of a
defective product and shall not, in any event, be liable for any incidental or consequential damages
of any kind resulting from use or possession of this product. Some states do not allow: (A)
limitations on how long an implied warranty lasts; or (B) the exclusion or limitation of incidental or
consequential damages, so the above limitations or exclusions may not apply to you. This warranty
gives you specific legal rights. You may have other rights that vary from state to state.
1.2 Unpacking
Your Chiller is shipped in a special carton. Retain the carton and all packing materials until the unit is
completely assembled and working properly. Set up and run the unit immediately to confirm proper
operation. Beyond one week, your unit may be warranty repaired, but not replaced. 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.
This symbol marks chapters and sections of this instruction manual that are particularly relevant to safety. When
attached to the unit, this symbol draws attention to the relevant section of the instruction manual.
This symbol indicates that hazardous voltages may be present.
Read all instructions pertaining to safety, set-up, and operation.
Proper operation is the users’ responsibility.

6
Section 2 -- O er iew
2.1 Contents
— Recirculating Chiller
— Operators Manual
— Warranty Card
— IEC Power Cord
— Two sets of Inlet/Outlet Adapters: ½ inch male NPT, 5/8 inch male NPT
2.2 Description
These Refrigerated Recirculating 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.
Refrigerated Recirculating Chillers are equipped with either a centrifugal, positive displacement, or
regenerative turbine pump. Wetted parts within the recirculation system are brass, stainless steel,
polyethylene, EPDM rubber, and nylon.
Front/Top Rear
1. Temperature Display 9. Fluid Outlet
2. Select/Set Knob 10. Fluid Inlet
3. Power Button 11. Drain
4. Reservoir Cap and Internal Fluid Filter (top) 12. Reservoir Fluid Level Gauge
5. Air Filter 13. Circuit Breaker / Power Switch
6. Pressure / Flow Rate Display 14. IEC Power Connection
7. Units / Menu Select Button 15. Remote I/O Connection (optional)
8. Ambient Tracking Probe Connection (optional) 16. RS232 / RS 485 Connection (optional)
1
2
3
4
5
6
7
9
10
11
12
13
14
15
16
8

7
2.3 Chiller Specifications and Pump Performance
General Specifications (all Chillers)
Temperature Set Point Resolution ±0.1°C
Temperature Stability ±0.1°C
Temperature Units °C or °F
Pressure Units PSI or kPa
Pressure Display Resolution
Pressure Display Accuracy
1 PSI / 6.9 kPa
±3.5% of full scale (100PSI)
Flow Rate Units GPM or LPM
Flow Rate Display Resolution
Flow Rate Display Accuracy
0.1 GPM / 1 LPM
+/- 0.4 GPM / 1.5 LPM
Pump Inlet and Outlet ½ inch NPT
Pump Performance
Magnetic Drive Centrifugal Pump Positive Displacement Pump
Turbine Pump
All Models
¼ HP
1/3HP
½ HP
¾ HP
1 HP
¼ HP
1/3HP
½ HP
¾ HP
1 HP

8
Specifications — 1/4-HP, 1/3-HP, and 1/2-HP Chillers
Model: Rfg = Refrigerating Only
Rfg / Htg = Refrigerating & Heating
Magnetic Drive Centrifugal Pump
Model Rfg Rfg / Htg Rfg Rfg / Htg Rfg
Operating Temperature -10°to
40°C
-10°to
70°C
-10°to
40°C
-10°to
70°C -10°to 40°C
Compressor 1/4 HP 1/3 HP 1/2 HP
Cooling Capacity @ 20°C
10°C
0°C
800 watts 2728 BTU/hr
500 watts 1705 BTU/hr
200 watts 682 BTU/hr
1200 watts 4092 BTU/hr
900 watts 3069 BTU/hr
500 watts 1705 BTU/hr
1700 watts 5797 BTU/hr
1100 watts 3751 BTU/hr
750 watts 2557 BTU/hr
Pressure at 0 Flow Rate 10 psi / 69 kPa 10 psi / 69 kPa 10 psi / 69 kPa
Flow Rate at 0 psi 4.1 gpm / 15.5 lpm 4.1 gpm / 15.5 lpm 4.1 gpm / 15.5 lpm
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Dimensions (h x w x d) 22-5/8 x 14-1/2 x 27-5/8 in.
57.5 x 36.8 x 70.2 cm
Shipping Weight 131 pounds
59.4 kg
143 pounds
64.8 kg
168 pounds
76.2 kg
120 V, 60 Hz Chillers
Volts Range 108 to 132V
Amps 9.5A 10.0A 10.4A 10.7A 13.5A
240 V, 50 Hz Chillers
Volts Range
Over Voltage
198 to 264V
Category II
Amps 5.6A 5.9A 5.9A 6.2A 7.2A
Positive Displacement Pump (“P” Series Chillers)
Model P Series Chillers Rfg Rfg / Htg Rfg P Rfg / Htg Rfg
Operating Temperature -10°to
40°C
-10°C to
70°C
-10°to
40°C
-10°C to
70°C -10°to 40°C
Compressor 1/4 HP 1/3 HP 1/2 HP
Cooling Capacity @ 20°C
10°C
0°C
800 watts 2728 BTU/hr
500 watts 1705 BTU/hr
200 watts 682 BTU/hr
1200 watts 4092 BTU/hr
900 watts 3069 BTU/hr
500 watts 1705 BTU/hr
1700 watts 5797 BTU/hr
1100 watts 3751 BTU/hr
750 watts 2557 BTU/hr
Flow Rate @ 0 psi 1 gpm / 3.75 lpm 1 gpm / 3.75 lpm 1 gpm / 3.75 lpm
Pump Pressure (adjustable) 20 to 100 psi
138 to 689 kPa
20 to 100 psi
138 to 689 kPa
20 to 100 psi
138 to 689 kPa
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Shipping Weight 141 pounds
64 kg
153 pounds
69 kg
178 pounds
81 kg
120 V, 60 Hz Chillers
Volts Range 108 to 132V
Amps 12.2A 12.5A 13.1A 13.5A 16.0A
240 V, 50 Hz Chillers
Volts Range
Over Voltage
198 to 264V
Category II
Amps 6.8A 7.1A 7.3A 7.6A 8.9A

9
Model: Rfg = Refrigerating Only
Rfg / Htg = Refrigerating & Heating
Turbine Pump (“T” Series Chillers)
Model T Series Chillers Rfg Rfg / Htg Rfg Rfg / Htg Rfg
Operating Temperature -10°to
40°C
-10°C to
70°C
-10°to
40°C
-10°C to
70°C -10°to 40°C
Compressor 1/4 HP 1/3 HP 1/2 HP
Cooling Capacity @ 20°C
10°C
0°C
800 watts 2728 BTU/hr
500 watts 1705 BTU/hr
200 watts 682 BTU/hr
1200 watts 4092 BTU/hr
900 watts 3069 BTU/hr
500 watts 1705 BTU/hr
1700 watts 5797 BTU/hr
1100 watts 3751 BTU/hr
750 watts 2557 BTU/hr
Flow Rate @ 0 psi 3.5 gpm / 13.2 lpm 3.5 gpm / 13.2 lpm 3.5 gpm / 13.2 lpm
Pump Pressure (adjustable) 20 to 90 psi
138 to 621 kPa
20 to 90 psi
138 to 621 kPa
20 to 90 psi
138 to 621 kPa
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Shipping Weight 143 pounds
65 kg
156 pounds
71 kg
181 pounds
82 kg
120 V, 60 Hz Chillers
Volts Range 108 to 132V
Amps 12.2A 12.5A 13.1A 13.5A 16.0A
240 V, 50 Hz Chillers
Volts Range
Over Voltage
198 to 264V
Category II
Amps 6.8A 7.1A 7.3A 7.6A 8.9A
Specifications subject to change without notice.

10
Specifications — 3/4-HP and 1-HP Chillers
Model: Rfg = Refrigerating Only
Rfg / Htg = Refrigerating & Heating
Magnetic Drive Centrifugal Pump
Model Rfg Rfg / Htg Rfg Rfg / Htg
Operating Temperature -10°to 40°C -10°to 70°C -10°to 40°C -10 to 70°C
Compressor 3/4 HP 1 HP
Cooling Capacity @ 20°C
10°C
0°C
2500 watts 8525 BTU/hr
1700 watts 5797 BTU/hr
760 watts 2591 BTU/hr
2900 watts 9889 BTU/hr
1950 watts 6649 BTU/hr
1000 watts 3410 BTU/hr
Pressure at 0 Flow Rate 10 psi / 69 kPa 10 psi / 69 kPa
Flow Rate at 0 psi 4.1 gpm / 15.5 lpm 4.1 gpm / 15.5 lpm
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Dimensions (h x w x d) 22-5/8 x 14-1/2 x 27-5/8 in.
57.6 x 36.8 x 70.2 cm
Shipping Weight 187 pounds
84.8 kg
189 pounds
85.7 kg
208-230 V, 60 Hz
Volts Range 187 to 253V
Amps 9.2A 9.5A 9.5A 9.8A
240 V, 50 Hz
Volts Range
Over Voltage
198 to 264V
Category II
Amps 9.2A 9.5A 9.5A 9.8A
Positive Displacement Pump (“P” Series Chillers)
Model P Series Chillers Rfg Rfg / Htg Rfg Rfg / Htg
Operating Temperature -10°to 40°C -10°to 70°C -10°to 40°C -10°to 70°C
Compressor 3/4 HP 1 HP
Cooling Capacity @ 20°C
10°C
0°C
2500 watts 8525 BTU/hr
1700 watts 5797 BTU/hr
760 watts 2591 BTU/hr
2900 watts 9889 BTU/hr
1950 watts 6649 BTU/hr
1000 watts 3410 BTU/hr
Flow Rate @ 0 psi 3.5 gpm / 13.2 lpm 3.5 gpm / 13.2 lpm
Pump Pressure (adjustable) 20 to 100 psi
138 to 689 kPa
20 to 100 psi
138 to 689 kPa
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Shipping Weight 197 pounds
89 kg
199 pounds
90 kg
208-230 V, 60 Hz
Volts Range 187 to 253V
Amps 11.9A 12.2A 12.2A 12.5A
240 V, 50 Hz
Volts Range
Over Voltage
198 to 264V
Category II
Amps 11.9A 12.2A 12.2A 12.5A

11
Model: Rfg = Refrigerating Only
Rfg / Htg = Refrigerating & Heating
Turbine Pump (“T” Series Chillers)
Model T Series Chillers Rfg Rfg / Htg Rfg Rfg / Htg
Operating Temperature -10°to 40°C -10°to 70°C -10°to 40°C -10°to 70°C
Compressor 3/4 HP 1 HP
Cooling Capacity @ 20°C
10°C
0°C
2500 watts 8525 BTU/hr
1700 watts 5797 BTU/hr
760 watts 2591 BTU/hr
2900 watts 9889 BTU/hr
1950 watts 6649 BTU/hr
1000 watts 3410 BTU/hr
Flow Rate @ 0 psi 3.5 gpm / 13.2 lpm 3.5 gpm / 13.2 lpm
Pump Pressure (adjustable) 20 to 90 psi
138 to 621 kPa
20 to 90 psi
138 to 621 kPa
Reservoir Capacity 1.1 gal / 4.2 liters 1.1 gal / 4.2 liters
Shipping Weight 197 pounds
89 kg
199 pounds
90 kg
208-230 V, 60 Hz
Volts Range 187 to 253V
Amps 11.9A 12.2A 12.2A 12.5A
240 V, 50 Hz
Volts Range
Over Voltage
198 to 264V
Category II
Amps 11.9A 12.2A 12.2A 12.5A
Specifications subject to change without notice.
Notes: Refer to the serial number plate on the rear of the Chiller for model and electrical data.
Cooling capacity (watts x 3.41) = BTU/hour. Performance specifications determined at ambient temperature of 20°C (68°F).
For 50Hz models, derate cooling capacity 17%.
Positive Displacement Pump Models: External pressure reducing assembly (Cat. No. 060302) steps down high outlet
pressure to 10 to 45psi.
Environmental Conditions Indoor use only
Maximum Altitude: 2000 meter
Operating Ambient: 5°to 30°C
Relative Humidity: 80% for temperatures to 30°C
Pollution Degree: 2
Class 1: Residential, Commercial, Light Industrial
Class 2: Heavy Industrial

12
Section 3 – Installation and Startup
WARNING: Be sure all power is off before proceeding.
3.1 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 outlet wired with 14 gauge or larger
diameter wire. 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.
3.2 Electrical Power
An IEC power cord is provided with the Chiller. It should be attached to the receptacle on the rear of
the enclosure. Make sure that the power outlet used for the Chiller is properly grounded and
matches the voltage and frequency indicated on the identification label on the back of the Chiller.
The use of an extension cord is not recommended. However, if one is necessary, it must be properly
grounded and capable of handling the total wattage of the unit. The extension cord must not cause
more than a 10% drop in voltage to the Chiller.
WARNING: DO NOT plug the Chiller into the electrical outlet until the
unit is ready for Startup (Section 3.7 below).
3.3 Optional Signal Inputs/Outputs
External Temperature Probe
This option allows you to control cooling fluid temperature using an external temperature
measurement (ambient room/machine temperature or process temperature). A 4-pin connector is
provided on the underside of the local control panel for connecting the external temperature 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.
RS232 / 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(1200 meters). A 9-pin D-connector is provided on the rear of the
instrument enclosure for this connection.

13
Remote I/O Port
This option allows you to use an external 12 VDC signal to turn the Chiller on and off. A 9-pin D-
connector is provided on the rear of the instrument enclosure for this connection.
3.4 Plumbing
Process Piping
The Chiller has two internally threaded (1/2 inch ID NPT) fittings on the rear of the instrument
housing for the process water connections. Two sets of adapters (1/2 inch ID and 5/8 inch ID) are
supplied with the unit for connecting these fittings to the process piping.
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.
•Pressure Ratings — Hoses should be able to withstand the largest pressure that they will
encounter. For “P” Series (positive displacement pump) and “T” Series (turbine pump)
Chillers, this is 100 psi (689 kPa).
•Flexible Tubing — Avoid tubing that will expand and take up fluid volume when operating at
the desired pressure.
•Hose Diameter — Process piping/hosing with a diameter smaller than ½ inch ID can be
used if desired. However, keep in mind that using smaller diameter hosing increases
pressure in the circulating system.
•Couplings and Clamps — The use of screw-tightened hose clamps is necessary on all
joints to insure good, tight connections. Quick connectors are not recommended as they
have the potential for restricting flow rate.
Reservoir Drain
•A ½ 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 water in the reservoir, process, and process
lines.
3.5 Closed System or Cooling Coil Setup
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 (Cat. 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.
3.6 Open Bath System Setup
Connect the Chiller’s inlet and outlet to the external bath using tubing of the same diameter and
length. The same size fittings should also be used on both the inlet (suction) and outlet (pressure).
This helps ensure a balanced flow. A restricting valve or pinch clip should be installed in the outlet
tubing and adjusted to match the return (inlet) flow rate.
Cut the external end of the suction tube into a “V” shape so that the tube will not seal itself against
the wall of the external tank. Both the pressure and suction tubing should be securely fastened to
the external tank to prevent movement during use.
When using flexible tubing, the suction tubing must have a wall thickness that will not collapse under
vacuum, particularly when going around bends.
Fill the external bath (see Section 3. 7 below for suitable fluids). The bath fluid must be at a level at
least slightly above the opening of the inlet tubing.

14
3.7 Startup
Process Coolant
Suitable Fluids
IMPORTANT: Only use fluids that will satisfy safety, health, and equipment compatibility
requirements. Caustic, corrosive, or flammable fluids must never be used.
The Chiller is designed to accommodate a variety of coolant fluids (water, glycol mixtures, etc). For
most applications above 20°C (68°F), distilled water is satisfactory. For operation at or 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 (see Section 2.2).
WARNING: Do not use caustic, corrosive, or flammable fluids.
WARNING: Operation below 20°C (68°F) requires antifreeze in the
circulation fluid.
WARNING: FOR CHILLERS WITH MAGNETIC DRIVE PUMPS ONLY.
A low temperature fluid, such as a mixture of 50% ethylene or
propylene glycol / 50% water, or equivalent, must be used under all
operating conditions.
Filling the Reservoir
Remove the filler cap from the reservoir and, using a funnel, add fluid until it reaches the MAX line
on the reservoir’s fluid level gauge. When full, remove the funnel, but do not replace the cap at this
time.
Electrical Power
Plug the Chiller’s power cord into an appropriate electrical outlet (see Section 3.2).
Place the Circuit Breaker/Power Switch on the rear of the instrument enclosure in the “On” position.
Three decimal points will appear on the Temperature display; two decimal points will appear on the
pressure/flow rate display.
. . . . .
Starting Process Fluid Flow
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. Fifteen to 20 seconds after power up, the compressor
will begin operating.
Check for leaks.
With the pump running, the reservoir’s fluid level will drop as the process and/or process cooling
lines fill with fluid. Add fluid as follows:
Closed Systems: Slowly add fluid to the reservoir until the liquid level remains stable.
Open Bath Systems: Adjust the restriction (pinch) valve until the liquid level in both
the bath and the reservoir remain stable. Add fluid as needed to bring liquid levels in
the bath and reservoir up to the desired level. Make sure the fluid level in the bath is
above the opening on the Chiller’s inlet hose.
Replace the reservoir cap.

15
Section 4
Section 4 Section 4
Section 4 –
––
–Operation
OperationOperation
Operation
NOTE: The Chiller incorporates a special “lockout” feature that can be enabled to prevent
unauthorized or accidental changes to set point and other operational values. This feature is
described in detail in Section 4.8. It should not be enabled until all operational parameters are set.
4.1 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 unit in which temperature is displayed is changed. The Chiller’s temperature set
point and various alarm settings should be reset to the desired values.
4.2 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 the temperature can be
changed.
Rotate the Select/Set Knob until the desired set point temperature is displayed. The setting is
accepted after either pressing the Select/Set Knob a second time or will be accepted automatically
after a few seconds of inactivity.
NOTE: This function is not available when the optional ambient tracking probe or remote
temperature control probe is installed and enabled. See Sections 4.3, 4.4, and 4.7.8.
4.3 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 cooling 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) (see Section 4.7.8), 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°to +5.0°C (-9.0°to +9.0°F) may be entered. The setting is
accepted after either pressing the Select/Set Knob a second time or will be accepted automatically
after a few seconds of inactivity.
4.4 Displaying and Adjusting 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 an external process.
When the optional remote control external probe is installed and enabled (rPC) (see Section 4.7.8),
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, rotate the Select/Set Knob until the desired set point
temperature is displayed. The setting is accepted after either pressing the Select/Set Knob a second
time or will be accepted automatically after a few seconds of inactivity.
4.5 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.

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Note: The flow readout is intended as a reference only. If accurate flow readings are required
an external flow meter is recommended.
NOTE: Metric pressure reading output must be multiplied by 100 for kPa.
4.6 Selecting the Internal/External Temperature Display
NOTE: This section applies only when the ambient tracking probe or remote temperature control are
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) (see Section 4.7.8), 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) (see Section 4.7.8), 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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4.7 Setting Operational Parameters
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.
Menu Item Description Choices / Ranges / Comments Default
Setting
HL High Temperature Limit
Alarm Set Point
+20°to 42°C / 68°to 108°F
(Refrigerating Chillers)
+20°to 72°C / 68°to 162°F
(Refrigerating / Heating Chillers)
35ºC
50ºC
LL Low Temperature Limit
Alarm Set Point -14°C to +15°C / 7°to 59°F (all units) 0.0ºC
HA
Front Panel High
Ambient Temperature
Alarm Set Point
+30°to 45°C.
Always displayed and set in °C. 40ºC
FP w/psi LED lit
Maximum Fluid
Pressure Alarm Set
Point
40 to 100 PSI 80 PSI
FP w/kPa LED
lit
Maximum Fluid
Pressure Alarm Set
Point
270 to 680 kPa 550 kPa
FL w/gpm LED
lit
Minimum Flow Rate
Alarm Set Point 0 or 0.8 to 2.0 GPM 0.0 GPM
FL w/lpm LED
lit
Minimum Flow Rate
Alarm Set Point 0 or 3 to 7 LPM 0.0 LPM
Sd
Establishes the cooling
and heating rate by
setting a desired
differential between the
measured internal and
external temperature.
4°C to 20°C
Always displayed and set in °C
NOTE: Sd is displayed only if the optional
remote temperature control probe is installed.
5°C
AF Auto-Refrigeration
Temperature Set Point
+20°to 40°C (Refrigerating Chillers)
+20°to 50°C (Refrigerating / Heating Chillers)
Always displayed/set in °C.
40ºC
50ºC
AtC (ambient temperature control probe
enabled)
rPC (remote temperature control probe
enabled)
NO (external temperature control probe
disabled)
NO
(optional)
rP External temperature
probe status
NAP (external temperature control probe not
installed) NAP
c
1 Internal Probe
Calibration Offset
±2.9°C.
Always displayed/set in °C.
Special access procedure required.
See Section 4.7.9.
0.0ºC
c 2 External Probe
Calibration Offset
±2.9°C.
Always displayed/set in °C.
Special access procedure required.
See Section 4.7.10.
0.0ºC
F c
Fluid Flow Rate
Calibration Gain
Coefficient
0.2 to 50.0
See Section 4.7.11. 1.0
PC Communications Baud
Rate
0, 2400, 4800, 9600, 19200.
Zero should be entered if RS232 is not being
used.
9600

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4.7.1 High Temperature Limit (HL)
This menu item serves two functions. First, it establishes the maximum allowable set point
temperature and thus helps prevent an operator from inadvertently setting the temperature set point
above a pre-established temperature. Secondly, it serves as a high temperature alarm,
automatically activating both audio and visual alarm indicators when the measured fluid temperature
reaches the HL setting. The compressor, heater, fan, and pump will also turn off.
To change the high limit value, rotate the Select/Set Knob until the desired high limit value is
displayed on the temperature display.
HL 35.0
4.7.2 Low Temperature Limit (LL)
This menu item also serves a dual function. First, it establishes the minimum allowable set point
temperature and thus helps prevent an operator from inadvertently setting the temperature set point
below a pre-established temperature. Secondly, it serves as a low temperature alarm, automatically
activating both audio and visual alarm indicators when the measured fluid temperature drops to the
LL setting. The compressor, heater, fan, and pump will also turn off.
To change the low limit value, rotate the Select/Set Knob until the desired low limit value is displayed
on the temperature display.
LL 0.0
4.7.3 High Ambient Temperature Limit (HA)
This menu item protects the Chiller from overheating due to a high ambient temperature. Should the
ambient temperature rise above the limit value, the audio and visual alarms will activate and the
compressor, heater, fan, and pump will turn off.
To change the high ambient temperature value, rotate the Select/Set Knob until the desired high
ambient temperature limit value is displayed on the temperature readout.
NOTE: This value is always displayed/set in °C.
HA 35
4.7.4 Maximum Fluid Pressure (FP)
This is the maximum allowable fluid pressure and can be set in either PSI or kPa (the LED adjacent
to the display indicates the active unit of measure). 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.
To change the fluid pressure limit value, rotate the Select/Set Knob until the desired maximum fluid
pressure value is displayed on the temperature readout.
NOTE: When FP first appears, the PSI LED will be lit. To view or change the FP value in kPa, press
the Units/Menu Button again. The FP will remain on the display and the kPa LED will light.
FP
•PSI
80
FP
•kPa x 100
5.5
NOTE: The Chiller also incorporates a built-in safety that automatically maintains fluid pressure
below a valve-regulated pressure value. It maintains this maximum outlet pressure by diverting the
flow of process fluid to the reservoir (i.e., begin internally recirculating the fluid). A maximum

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pressure value is set at the factory, but is user-adjustable. See Section 4.9 for information on
changing the maximum outlet pressure value.
4.7.5 Minimum Flow Rate (FL)
This is the minimum allowable flow rate and can be set in either GPM or LPM (the LED adjacent to
the display indicates the active unit of measure). Should the fluid flow rate drop below the minimum
flow rate value, the audio and visual alarms will activate and the compressor, heater, fan, and pump
will turn off.
To change the minimum flow rate value, rotate the Select/Set Knob until the desired flow rate value
is displayed on the temperature readout.
NOTE: When FL first appears, the GPM LED will be lit. To view or change the FL value in LPM,
press the Units/Menu Button again. The FL will remain on the display and the LPM LED will light.
With FL set to “0” the flow alarm is disabled and the chiller will continue to operate with the output
flow blocked.
Note: If flow rates are below 1.5 GPM this feature is not recommended as nuisance alarms may
result.
FL •GPM 0.8
FL •LPM 3.0
4.7.6 Maximum External / Internal Temperature Differential (Sd) (optional)
NOTE: This menu item (Sd) appears only when the remote temperature control probe is installed
and enabled (see Section 4.7.8). Values are always displayed in °C.
This value helps establish the cooling/heating rate when the remote temperature control probe is
being used. Maximum external/internal differential temperature values from 4°to 20°C may be
entered. The higher the setting, the more rapidly the Chiller will achieve the external temperature set
point. Low differential temperature settings minimize the amount of temperature
overshoot/undershoot that occurs when the measured external temperature reaches the external set
point temperature.
Sd 5.0
4.7.7 Auto-Refrigeration Temperature (AF)
This menu item allows you to select the temperature at which refrigeration is activated. To change
the displayed value, rotate the Select/Set Knob until the desired auto-refrigeration temperature is
displayed.
NOTE: This value is always displayed/set in °C.
AF 35.0
4.7.8 Remote Probe (rP)
NOTE: If an external temperature probe is not installed, NAP will be displayed when this menu item
is selected.
This menu item allows you to enable/disable the Chiller’s optional ambient temperature probe (AtC)
or remote temperature control probe (rPC).
If you wish to operate the Chiller using the ambient tracking probe, rotate the Select/Set Knob until
AtC is displayed. When this setting is selected, the cooling fluid temperature will be controlled at the

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temperature sensed by the ambient tracking probe (this may be room or machine temperature) plus
or minus a user-set offset temperature (see Section 4.3).
rP AtC
If you wish to operate the Chiller using the remote temperature probe, rotate the Select/Set Knob
until rPC is displayed. When this setting is selected, the temperature will be controlled using the
temperature sensed by the external probe. The rate of cooling will be controlled using the maximum
differential temperature setting (Sd) (see Section 4.7.6).
rP rPC
If you do not wish to operate the Chiller using either of these external probes, rotate the Select/Set
Knob until NO is displayed.
rP NO
4.7.9 Internal Calibration Offset (C1)
This menu item allows you to adjust the Chiller’s internal temperature reading to match that of a
traceable standard. It allows you to offset the displayed temperature value by as much as ±2.9°C.
NOTE: Calibration offset values are always set and displayed in °C. To prevent the operator from
accidentally changing the calibration offset, a special sequence of keystrokes is required to access
this function.
1. Press and hold the Units/Menu Button until HL appears on the display.
2. Press and release the Units/Menu Button until rP appears on the display.
3. Press and hold the Units/Menu Button.
4. While holding the Units/Menu Button, press and release the Select/Set Knob.
5. When CAL appears on the temperature readout, release the Units/Menu Button. The
current calibration offset value will appear on the temperature readout.
6. Rotate the Select/Set Knob until the desired calibration offset is displayed. Press the
Select/Set Knob or simply allow the display to time out to accept the displayed value.
C1 0.0
4.7.10 External Calibration Offset (C2)
This menu item allows you to adjust the Chiller’s external temperature reading to match that of a
traceable standard. It allows you to offset the displayed temperature value by as much as ±2.9°C. It
appears only if the external temperature probe is installed.
NOTE: Calibration offset values are always set and displayed in °C. To prevent the operator from
accidentally changing the calibration offset, a special sequence of keystrokes is required to access
this function.
1. Press and hold the Units/Menu Button until HL appears on the display.
2. Press and release the Units/Menu Button until C2 appears on the display.
3. Press and hold the Units/Menu Button.
4. While holding the Units/Menu Button, press and release the Select/Set Knob.
5. When CAL appears on the temperature readout, release the Units/Menu Button. The
current calibration offset value will appear on the temperature readout.