PolyScience F25N0A101B, F25N0A102E User manual

Operator’s Manual

Low Temperature Coolers

Model FT-25

Models IP-35, IP-60

110-064 04.25.12

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Table of Contents

Introduction.............................................................................................................................................................. 2

General Information................................................................................................................................................. 2

General Safety Information.................................................................................................................................... 2

Safety Recommendations...................................................................................................................................... 3

Regulatory Compliance and Testing...................................................................................................................... 3

Unpacking Your Low Temperature Cooler ............................................................................................................ 3

Contents................................................................................................................................................................. 3

Installation................................................................................................................................................................ 4

Electrical Power ..................................................................................................................................................... 4

Immersion Probe (IP) Coolers ............................................................................................................................... 4

Positioning the Immersion Probe Assembly....................................................................................................... 4

Flow Through (FT) Cooler...................................................................................................................................... 5

Tubing Connections ........................................................................................................................................... 5

Suitable Fluids.................................................................................................................................................... 6

Normal Operation .................................................................................................................................................... 7

Immersion Probe Coolers...................................................................................................................................... 7

Flow Through Coolers............................................................................................................................................ 7

Routine Maintenance & Troubleshooting ............................................................................................................. 8

Cleaning Exterior Surfaces.................................................................................................................................... 8

Cleaning the Refrigeration Condenser Fins........................................................................................................... 8

Draining Residual Oil from the Immersion Probe Assembly.................................................................................. 8

Troubleshooting ..................................................................................................................................................... 9

Technical Information ........................................................................................................................................... 11

Performance Specifications................................................................................................................................. 11

Equipment Disposal (WEEE Directive)................................................................................................................ 12

Service and Technical Support............................................................................................................................ 12

Warranty................................................................................................................................................................. 13

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Introduction

Thank you for choosing a Low Temperature Cooler. Designed to enhance and simplify your low temperature
work, Immersion Probe and Flow Through Coolers provide rapid, low-cost cooling of liquids to temperatures as
low as -60°C. Both styles run at maximum cooling capacity and are designed to provide continuous cooling.
Typical applications include the cooling of exothermic reactions, freeze point determinations, freeze drying, impact
testing, and vapor and solvent trapping.

Immersion Probe Coolers are excellent for trapping and Dewar-type applications and reduce the expense of
using dry ice or liquid nitrogen. A flexible hose allows convenient placement of the cooling probe.

Flow Through Coolers extend the temperature range of non-refrigerated circulators to below ambient and boost
the cooling capacity of refrigerated circulators. They also offer an economic alternative to the tap water cooling of
heated circulating baths when rapid cool-downs or operation at or near ambient is needed.

It will take you very little time to get your new Low Temperature Cooler installed and running, This Operator’s
Manual is designed to guide you quickly through the process. We recommend that you read i t thoroughly before
you begin.

General Information

General Safety Information

When installed, operated, and maintained according to the directions in this manual and common safety
procedures, your Low Temperature Cooler should provide safe and reliable liquid heating. Please ensure that all
individuals involved in the installation, operation, or maintenance of this unit read this manual thoroughly prior to
working with the unit.

This symbol alerts you to a wide range of potential dangers

This symbol advises danger from electricity or electric shock

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 indicates a protective conductor terminal.

Read all instructions pertaining to safety, set-up, and operation.

Proper operation is the user’s responsibility.

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Safety Recommendations

To prevent injury to personnel and/or damage to property, always follow your workplace’s safety procedures when
operating this equipment. You should also comply with the following safety recommendations:

• Always connect the power cord on this unit to a grounded (3-prong) power outlet. Make certain

that the outlet is the same voltage and frequency as your unit.

• Never operate the unit with a damaged power cord.

• Always turn the unit OFF and disconnect Mains power before performing any maintenance or

service.

Immersion Probe Coolers:

• Never touch the immersion probe assembly while the unit is operating.

• Always allow the immersion probe to warm to ambient temperature before repositioning or

working on the unit.

• Do not move the immersion probe assembly while the unit is operating.

Regulatory Compliance and Testing

CE (50 Hz units)

EC Low Voltage Directive 2006/95/EC
EC Electromagnetic Compatibility Directive 2004/108/EC
IEC 61010-1-2001
IEC 61010-2-2001
IEC 61326:2005 / EN 61326 : 2006

Unpacking Your Low Temperature Cooler

Your Low Temperature Cooler was packed in a special carton. You should keep this carton, along with all packing
materials, until the unit has been installed and you are certain it is working properly.

We recommend that you begin using your Low Temperature Cooler immediately to confirm proper operation,
since beyond one week you may be eligible for warranty repair only (rather than replacement). You’ll find
complete warranty information in the back of this manual.

In the unlikely event that the unit was damaged or does not operate properly, contact the transportation company,
file a damage claim, and contact the company where your Low Temperature Cooler was purchased.

CAUTION: Keep unit upright when moving. Be sure to follow your company’s procedures and practices
regarding the safe lifting and relocation of heavy objects.

Contents

The following items were included in the shipping carton:

• Low Temperature Cooler

• Operator’s Manual

• Warranty Card

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Installation

Locate the unit on a level surface, free from drafts and out of direct sunlight. Do not place it where there are
corrosive fumes, excessive moisture, high room temperatures, or where excessive dust is present.

The unit must be a minimum of 6 inches / 15.24 cm away from walls or vertical surfaces so that airflow around the
unit is not restricted. It should not
will be drawn into the air intake on the front of the unit.

NOTE: It is recommended that your unit be run in ambient temperatures below 95°F / 35°C.
While the unit will operate at higher ambient temperatures, it may not be able to achieve
maximum cooling performance

Electrical Power

WARNING: Make certain that the electrical outlet is the same voltage and frequency as your Low

Temperature Cooler. The correct voltage and frequency for your unit are indicated on the identification label.

IMPORTANT: The use of an extension cord is not recommended. 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 unit.

Verify that the Power Switch / Circuit Breaker is in the OFF position.
Connect the Electrical Power Cord to an appropriate electrical outlet.

be placed in cabinets or where exiting warm air or warm air from other devices

WARNING: DO NOT place your Low Temperature Cooler’s Power Switch / Circuit Breaker in the ON position
until you are ready to begin operation.

Immersion Probe (IP) Coolers

Positioning the Immersion Probe Assembly

Immersion Probe Coolers have a flexible hose connected to a probe which can be easily immersed in a
Dewar flask, cold trap, or bath requiring cooling.

When installing an Immersion Probe Cooler, make sure that the Immersion Probe Assembly is properly
positioned. It should not be twisted. Incorrect positioning of the Wand Assembly will cause your unit to
perform below specifications.

CAUTION: Moving the Immersion Probe Assembly while the unit is operating may result in
damage.

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Flow Through (FT) Cooler

Tubing Connections

The Flow Through Cooler is designed to provide auxiliary cooling to a circulator or other
connected device. 3/8 inch female NPT fittings are provided on the rear of the unit for the
inlet and outlet connections. Depending on the application, tubing connections are ma de as
illustrated below:

Fig. A: Fluid connections and flow when

Device To Be
Operated At
Controlled
Temperature

Flow-

Through

Cooler

Fluid In Fluid Out

using the Flow Through Cooler to
control the temperature of an external
device.

Circulator

Circulator

Fluid Out

Fluid In

Fig. B: Fluid connections and flow when using the

Flow Through Cooler to temper samples in a
circulator.

Flow-Through

Cooler

When all connections have been made, fill the circulator with the cooling fluid to be used (see Suitable Fluids) and
start the circulator’s pump.

Application Notes:

1. Your application may require that fluid be pumped through one or more external closed systems (as in Figure
A). The only limitations on this type of configuration are the pump capacity and the Cooler’s cooling capacity.

2. The circulator must have enough heat capacity to compensate for the cooling effect of the Cooler. If the
heating is insufficient, the fluid will continue to be cooled below the circulator’s set point temperature, resulting
in poor temperature control.

3. Fluid may need to be added to the circulator reservoir to compensate for fluid pumped into the tubing, the
Cooler, and external device.

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Suitable Fluids

WARNING:

DO NOT circulate water through your Flow Through Cooler.
DO NOT use combustible or toxic fluids, such as pure methanol.
DO NOT use fluids corrosive to copper.

There are two important factors to consider when choosing a cooling fluid to use with your Flow Through Cooler:
Fluid viscosity and freeze point.

The two most frequently used fluids are (1) a mixture of methanol and distilled water and (2) a mixture of ethylene
glycol or propylene glycol and distilled water. For most applications, a 50:50 mixture of methanol and distilled
water is preferred. This mixture is low in viscosity, has a low freezing point, and is not flammable.

The following table lists various fluids and their performance characteristics. We recommend then when usi ng any
fluid, you stay within the fluid’s normal temperature range for best stability and low vaporization.

Fluid Description

Methanol (50%) / water (50%) 1 -40° to 10°C -50° to 20°C
polycool EG -25
polycool PG -20
DC200 (5 cSt) silicone oil 5 -35° to 60°C* -50° to 125°C*
DC200 (10 cSt) silicone oil 10 -20° to 80°C -35° to 165°C*
polycool HC -50 3 -53° to 60°C* -62° to 60°C*

1. Ethylene glycol

2. Propylene glycol

* This is the fluid’s flash point temperature

(1)

(50%) / water (50%) 20 -25° to 100°C -35° to 115°C

(2)

(50%) / water (50%) 20 -20° to 100°C -30° to 115°C

Viscosity

(cSt) @ 25°C

Normal

Temperature Range

Extreme

Temperature Range

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Normal Operation

NOTE: Low Temperature Coolers operate at maximum cooling performance.

IMPORTANT: To protect the compressor from damage, the Low Temperature Cooler

incorporates a special safety switch that delays compressor startup for 10 minutes whenever
power is applied. This 10 minute delay will occur even when power is only momentarily
disrupted.

Immersion Probe Coolers

1. Place the Power Switch / Circuit Breaker in the ON position.

2. Immerse the Cooler’s immersion probe in the fluid to be cooled. Periodically check the temperature of the

fluid to determine if it is dropping at a reasonable rate.

CAUTION: The IP-60 Immersion Probe Cooler is designed to reduce the temperature
of a fluid in a Dewar flask and can also be used for cold traps in vacuum systems and other
applications. It is intended for use only at temperatures between -60° and -20°C; the IP-60

IMMERSION PROBE COOLER SHOULD NOT

-20°C for extended periods of time.

BE OPERATED AT TEMPERATURES ABOVE

CAUTION: Moving the Immersion Probe Assembly while the unit is operating may result in

damage.

Flow Through Cooler

1. Set the circulator’s temperature control to the desired temperature and allow a few minutes for the bath

fluid to begin circulating through the system.

2. Place the FT-25’s Power Switch / Circuit Breaker in the ON position.

3. Periodically check the circulator to determine if the temperature is being controlled as expected.

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Routine Maintenance & Troubleshooting

Cleaning Exterior Surfaces

Only mild detergents and water or an approved cleaner should be used on the painted surfaces of your Low
Temperature Cooler.

Cleaning the Refrigeration Condenser Fins

To keep the refrigeration system operating at optimum cooling capacity, the refrigeration condenser fins located
behind the front grill holes should be kept free of dust and dirt. Accumulated dust should be blown out periodically
using clean, dry compressed air.

Draining Residual Oil from the Immersion Probe Assembly

A thin film of oil may build up within the Immersion Probe Assembly with extended use and adversely affect the
Immersion Probe Cooler’s cooling efficiency. To ensure maximum cooling performance, we recommend that this
oil be drained from the Immersion Probe Assembly after every 200 hours of use or whenever you see a drop in
cooling performance.

1. Place the Power Switch / Circuit Breaker in the OFF position.

2. Elevate the Immersion Probe Assembly as high as possible above the enclosure for 10 to 15 minutes to

allow residual oil to drain back into the compressor. Do not allow the assembly to twist or dip as oil may
pool internally in these areas.

CAUTION: Moving Immersion Probe Assembly while unit is operating may result in damage.

IMPORTANT: Should you experience frequent drops in cooling performance d ue to the

accumulation of oil in the Immersion Probe Assembly, verify that it is properly installed, without
any twists.

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Troubleshooting

CAUTION: Always turn the Power Switch / Circuit Breaker OFF and disconnect the electrical

cord from the power source before servicing the unit.

Problem Cause Corrective Action

Unit does not run
(all models)

No cooling or
insufficient cooling

(FT-25)

No power to unit

Power Switch / Circuit
Breaker in OFF position

Compressor overload
switch has tripped

No power to unit
Blocked airflow

Fluid too hot for Cooler to
continuously cool

Insufficient flow rate

Fluid viscosity too high
Freezing at desired

temperature
Compressor overload
Insufficient electrical power

Compressor fan not
operating

Refrigerant leak

Compressor failure

Check that electrical cord is plugged into an operating
electrical outlet.

Place Power Switch / Circuit Breaker in ON position.

Allow approximately 10 minutes for unit to restart.
Check refrigeration condenser fins and air vents for

blockages.
Check that airflow around unit is not restricted and that

room temperature does not exceed 95°F / 35°C
Check compressor fan for operation (listen for fan noise,

check for airflow through unit)
Check that Power Switch / Circuit Breaker is ON

Check refrigeration condenser fins and air vents for
blockages.

Check heat removal specifications. At less than 0°C, heat
loss to room may be excessive.

External reservoirs and tubing should be insulated where
condensation or frost occur. High power pumps can
introduce excessive heating.

Check tubing connections. Quick-connect fittings or tubing
less than 3/8 inch diameter may restrict flow. Flow should
be 3 to 15 liters/minute.

Use lower viscosity fluid.
Fluid freeze point should be 10° to 20°C lower than

desired temperature.
Shut off power for 10 minutes and then restart.
Check for proper voltage and frequency at power source

during startup. Voltage must be within 10% of rated
voltage. Use of extension cords may cause voltage drops.

Check compressor fan for operation (listen for fan noise,
check for airflow through unit)

Have licensed refrigerating service technician recover
refrigerant, locate and repair leak, evacuate and recharge
system.

Contact factory.

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Problem Cause Corrective Action

Gradual loss of
cooling

(FT-25)

Fluid gets too cold
(FT-25)

Compressor
shakes, stalls, or
continually restarts

(all models)

Blocked airflow

Refrigerant leak

Compressor valves failing

Insufficient heating

Compressor cycling or
overloaded

Check refrigeration condenser fins and air vents for
blockages.

Have licensed refrigerating service technician should
recover refrigerant, locate and repair leak, evacuate and
recharge system.

Contact factory.

Circulator or external system cannot provide sufficient
heating to compensate for cooling capability of Cooler.
System with greater heating capability required.

Check air filter and air vents for blockages.
Check that airflow around unit is not restricted and that

room temperatures does not exceed 95°F / 35°C.
Verify that voltage during start cycle is within 10% of rated

voltage.
Check compressor fan for operation (listen for fan noise,

check for airflow through unit).

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Technical Information

Performance Specifications

IP-35

Model IP-60

Small Coil Large Coil

Temperature Range -60° to -20°C -35° to +40°C -25° to +40°C

Temperature Control Fixed at -60°C Fixed at -35°C Fixed at -25°C

FT-25

Electrical
Requirements

Cooling Capacity
watts @ -40°C

-20°C
0°C
20°C

Overall Dimensions
(L x W x H)

Probe Diameter 1.5 in. / 3.8 cm 1.75 in. / 4.4 cm 3.0 in. / 7.6 cm N/A

Inlet/Outlet N/A N/A N/A 3/8 in. female NPT

Compressor HP 1/4 HP 1/4 HP 1/4 HP 1/3 HP

120V,

60Hz, 5A

100
150

11 x 10 x 9 in. /

27.9 x 25.4 x 22.9 cm

240V,
50Hz,

2.5A

83

125

120V,

60Hz, 5A

152
421

1,004

240V,
50Hz,

2.5A

130
360
858

120V,

60Hz, 5A

164
454

1081

17 x 14 x 14 in. /

43.2 x 35.5 x 35.5 cm

240V,
50Hz,

2.5A

140
388
924

120V,

60Hz, 5A

117
322
745

240V,
50Hz,

2.5A

100
275
656

Environmental Conditions: For indoor use only
Maximum altitude: 6562 ft. / 2000 m
Relative humidity: 80% for temperatures up to 95°F / 35°C
Over voltage: ±10%
Nominal ambient: 68°F / 20°C
Maximum recommended operating ambient: 95°F / 35°C
Installation Category: II
Pollution Degree: 2

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Equipment Disposal (WEEE Directive)

or

This equipment is marked with the crossed out wheeled bin symbol to indicate it 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.

It is your responsibility to correctly dispose of this equipment at lifecycle-end by handing it over to an authorized
facility for separate collection and recycling. It is also your responsibility to decontaminate the equipment in case
of biological, chemical and/or radiological contamination, so as to protect the persons involved in the disposal and
recycling of the equipment from health hazards. By doing so, you will help to conserve natural and environmental
resources and you will ensure that your equipment is recycled in a manner that protects human health.

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.

Service and Technical Support

If you have followed the troubleshooting steps outlined previously and your Low Temperature Cooler still fails to
operate properly, contact the supplier from whom the unit was purchased. Have the following information
available for the customer service person:

• Model, Serial Number, and Voltage (from back panel label)

• Date of purchase and purchase order number

• Supplier’s order number or invoice number

• A summary of the problem

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Warranty

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 a replacement unit is sent,
the defective unit must be returned to the manufacturer within 30 days of receipt of the replacement unit. If the
defective unit is not received within 30 days, the manufacturer reserves the right to bill for the replacement unit.

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 b e 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.

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