Thermo CFT-25, CFT-33, CFT-75, CFT-150, CFT-300 Instruction And Operation Manual
NESLAB CFT Series
Recirculating Chiller
Thermo Manual P/N U00362
Instruction and Operation Manual
No part of this publication may be reproduced or reprinted except for personal use
without the prior permission of Thermo
Electron.
Rev. 08/18/99
NESLAB CFT Series Recirculating Chiller
PREFACE
SECTION I
Safety
SECTION II
General Information
SECTION III
Installation
SECTION IV
Operation
SECTION V
Maintenance & Service
SECTION VI
Troubleshooting
WARRANTY
Compliance ............................................................................................ 3
Unpacking .............................................................................................. 3
Warranty ................................................................................................. 3
NES-care ................................................................................................ 3
After-sale Support ................................................................................... 3
Warnings ................................................................................................ 4
Additional Warnings ............................................................................... 5
Description ............................................................................................. 6
Specifications ......................................................................................... 6
Cooling Capacity .................................................................................... 8
Pump Capacity....................................................................................... 8
Site ......................................................................................................... 9
Electrical Requirements ......................................................................... 10
Plumbing Requirements ......................................................................... 10
Fluids ..................................................................................................... 11
Water Quality Standards and Recommendations................................... 12
Filling Requirements ............................................................................... 13
Start Up .................................................................................................. 15
Temperature Controller .......................................................................... 16
Temperature Limits ................................................................................ 17
Pressure Relief Valve............................................................................. 17
High/Low Pressure Cutouts .................................................................... 17
High Temperature Cutout (Optional) ...................................................... 18
Heater Package (Optional) ..................................................................... 18
External Pressure Reducer (Optional) .................................................... 19
Service Contracts ................................................................................... 20
Draining the Reservoir ........................................................................... 20
Cleaning ................................................................................................. 20
Algae ...................................................................................................... 21
Pump Strainer ........................................................................................ 21
Pump Lubrication ................................................................................... 22
Hoses..................................................................................................... 22
Suction Discharge Pressure/Speed Check ............................................ 22
Error Codes ............................................................................................ 23
Displaying Software Version ................................................................... 23
CFT-300 Fuses ....................................................................................... 24
Pump Flow Diagram............................................................................... 24
Checklist ................................................................................................ 25
Service Assistance ................................................................................. 25
- 1 -
CFT Series Quick Reference Operating Procedures
Installation
The unit has an air-cooled refrigeration system. Air
is drawn in the front of the unit and discharged
through rear and side. Position the unit so the
intake and discharge are not impeded. Inadequate
ventilation will cause a reduction in cooling capacity and, in extreme cases, compressor failure.
Excessively dusty areas should be avoided and a
periodic cleaning schedule should be instituted.
For proper operation, the unit needs to pull substantial amounts of air through a condenser. A
build up of dust or debris on the fins of the condenser will lead to a loss of cooling capacity.
The unit will retain its full rated capacity in ambient
temperatures up to approximately +24°C.
Make sure the voltage of the power source meets
the specified voltage, ±10%.
The plumbing connections are located on the rear
of the unit and are labelled either SUPPLY and
RETURN or OUTLET and INLET. These connections are ½ inch FPT, ¾ inch FPT for CFT-150s
with CP-55 pumps and CFT-300s. Remove the
plastic protective plugs from both plumbing connections. Connect the OUTLET/SUPPLY fitting to
the inlet of the instrument being cooled. Connect
the INLET/RETURN fitting to the outlet of the
instrument being cooled.
To fill the reservoir, remove the reservoir access
panel by unscrewing the thumbscrews. Locate the
reservoir plug (square nut). Remove the plug and
fill the reservoir with clean cooling fluid.
We recommend using distilled/deionized water with
a 0.05 to 0.1 megohm-cm reading.
If you do not have access to distilled/deionized
water we recommend using filtered tap water.
Operation
Before starting the unit, double-check all electrical
and plumbing connections. Make sure the circulating system has been filled with cooling fluid.
To start the unit, place the Power Switch to the on
position. The Power Switch illuminates (except for
the CFT-150) to indicate the system is operating.
To turn the unit off, place the Power Switch to the
off position.
When the unit is shut off, wait approximately five
minutes before restarting. This allows time for the
refrigeration pressures to equalize. If the pressures
are not allowed to equalize, the compressor will
short-cycle and no cooling will occur.
Temperature Adjustment
To display the temperature setpoint, press the
NEXT ENTER button on the controller. To adjust
the temperature setpoint, press the YES or NO key
until the desired temperature setpoint is indicated.
Once the setpoint is adjusted, press NEXT ENTER. The display will now indicate the temperature
of the fluid in the reservoir.
Periodic Maintenance
Periodically inspect the reservoir fluid. If cleaning is
necessary, flush the reservoir with a cleaning fluid
compatible with the circulating system and the
cooling fluid.
The cooling fluid should be replaced periodically.
When operating at low temperatures, the concentration of water in the cooling fluid will increase
over time, leading to a loss of cooling capacity.
Before changing the cooling fluid, raise the unit's
operating temperature to de-ice the cooling coils.
Periodic vacuuming of the condenser fins is
necessary. The frequency of cleaning depends on
the operating environment. We recommend a
visual inspection of the condenser be made
monthly after initial installation. After several
months, the cleaning frequency will be established.
Units with PD pumps have a strainer. If debris is in
the system, the strainer will prevent the material
from being drawn into the pump and damaging the
pump vanes.
After initial installation, the strainer may become
clogged. Clean the strainer after the first week of
installation. After this first cleaning, we recommend
a monthly visual inspection. After several months,
the cleaning frequency will be established. Before
cleaning, disconnect the power cord from the
power source and drain the reservoir.
The Cool LED indicates the status of the refrigeration system. It illuminates to indicate the refrigeration system is removing heat from the cooling fluid.
As the operating temperature approaches the
setpoint, the LED will flash.
- 2 -
Compliance
Unpacking
Preface
Products tested and found to be in compliance with the requirements defined in the
EMC standards defined by 89/336/EEC as well as Low Voltage Directive (LVD) 73/
23/EEC can be identified by the CE label on the rear of the unit. The testing has
demonstrated compliance with the following directives:
LVD, 73/23/EEC Complies with UL 3101-1:93
EMC, 89/336/EEC EN 55011, Class A Verification
EN 50082-1:1992
IEC 1000-4-2:1995
IEC 1000-4-3:1994
IEC 1000-4-4:1995
For any additional information refer to the Letter of Compliance that shipped with
the unit (Declaration of Conformity).
Retain all cartons and packing material until the unit is operated and found to be in
good condition. If the unit shows external or internal damage contact the transportation company and file a damage claim. Under ICC regulations, this is your
responsibility.
When unpacking the unit, we recommends using a hoist. Units are not equipped
with handles. Roll the unit on its casters to move it.
Warranty
NES-care Extended
Warranty Contract
After-sale Support
If this product has been modified to operate at 0°C or lower, it has been tested with
a non-freezing fluid. Although the system has been drained, some residual fluid
may remain. This will not hinder your unit's performance.
Units have a warranty against defective parts and workmanship for one full year
from date of shipment. See back page for more details.
Extend parts and labor coverage for an additional year.
Worry-free operation.
Control service costs.
Eliminate the need to generate repair orders.
No unexpected repair costs.
Other contract options are available. Please contact us for more information.
Thermo Electron Corporation is committed to customer service both during and
after the sale. If you have questions concerning the unit operation, contact our
Sales Department. If your unit fails to operate properly, or if you have questions
concerning spare parts or Service Contracts, contact our Service Department.
Before calling, please refer to the labels on the rear of the unit to obtain the following information:
- unit BOM number_________________________________
- unit serial number ________________________________
- software version (see page 23)_______________________
- 3 -
Warnings
Section I Safety
Warnings are posted throughout the manual. These warnings are designated by an exclamation mark inside an equilateral triangle and text highlighted in bold. Read and follow these important instructions. Failure to
observe these instructions can result in permanent damage to the unit,
significant property damage, or personal injury or death.
Make sure you read and understand all instructions and safety precautions
listed in this manual before installing or operating your unit. If you have any
questions concerning the operation of your unit or the information in this
manual, please contact our Sales Department (see After-sale Support).
Never place the unit in a location where excessive heat, moisture, or
corrosive materials are present.
The unit construction provides protection against the risk of electrical
shock by grounding appropriate metal parts. The protection may not
function unless the power cord is connected to a properly grounded
outlet. It is the user's responsibility to assure a proper ground connection is provided.
Never connect the OUTLET/SUPPLY or INLET/RETURN fitting to your
building water supply or any water pressure source.
Never use flammable or corrosive fluids with this unit. Distilled and
deionized water may be aggressive and cause material corrosion.
Please contact us before subjecting this unit to prolonged exposure to
distilled or deionized water.
Do not use automobile anti-freeze. Commercial anti-freeze contains
silicates that can damage the pump seals. Use of automobile antifreeze will void the manufacturers warranty.
Do not replace reservoir plug with a non-vented type or damage to the
tank may occur.
- 4 -
Additional Warnings
In addition to the specific warnings listed on the previous page the following
general warnings apply to you unit:
Performance of installation, operation, or maintenance procedures
other than those described in this manual may result in a hazardous
situation and may void the manufacturer's warranty.
Transport the unit with care. Sudden jolts or drops can damage the
refrigeration lines.
Observe all warning labels.
Never remove warning labels.
Never operate damaged or leaking equipment.
Never operate the unit without cooling fluid in the reservoir.
Always turn off the unit and disconnect the power cord from the power
source before performing any service or maintenance procedures, or
before moving the unit.
Always empty the reservoir before moving the unit.
Never operate equipment with damaged power cords.
Refer service and repairs to a qualified technician.
- 5 -
Description
Specifications
Cooling Capacity
1,2
Section II General Information
The NESLAB CFT Recirculating Chiller is designed to provide a continuous
supply of cooling fluid at a constant temperature and volume.The unit consists
of an air-cooled refrigeration system, a sealable reservoir, recirculating pump,
and a temperature controller.
Throughout the manual, you will be asked to consult the units serial number
label or the pump identification label for specific information. Both labels are
located on the rear of the unit.
12
A
Temperature Range
Temperature Stability
8
4
5
4
3
HEAT REMOVAL (KILOWATTS)
2
1
0 5 10 15 20 25 30
TEMPERATURE (°C)
B
A=CFT-300, 60HZ
B=CFT-300, 50HZ
C
D
E
F
H
G
C=CFT-150, 60HZ
D=CFT-150, 50HZ
E=CFT-75, 60HZ
F=CFT-75, 50HZ
G=CFT-33, 60HZ
H=CFT-33, 50HZ
I=CFT-25, 60HZ
J=CFT-25, 50HZ
I
J
CFT-25 CFT-33 CFT-75 CFT-150 CFT-300
3
4
+5°C to +30°C
±0.5°
+5°C to +35°C
±1.0°C
Reservoir Volume
5
Gallons
Liters
Refrigerant
Pollution Degree
1. 60 Hertz CFT-75s with a "Turbulator" tank have a 2500 watt cooling capacity.
2. Circulating water at 20°C, at 20°C ambient. Cooling capacity will vary depending on fluid
temperature, ambient temperature, and cooling fluid. A PD-1 pump was used in the CFT-25, a
PD-2 in the other units.
3. Modified temperature ranges from -15°C to +85°C are available.
4. CFT-300 stability determined with 86% heat load.
5. 1.25 gallons (4.73 liters) for 50 Hertz CFT-75 units.
0.4
1.4
1.1
4.2
- 6 -
1.8
6.8
II, IAW IEC 664
5.6
21.3
R22R134a
I
H
Unit Dimensions
Dimension A
Dimension B
Dimension C
Dimension D
Dimension E
Dimension F
Dimension G
Dimension H
A
F
E
D
C
B
CFT25 CFT33 CFT75 CFT150 CFT300
22 24½ 26½ 36¾ 43
12½ 14¾ 14 7/8 213/8 25½
21 22 24½ 27¾ 27¾
2¾ 2½ 2½ 3½ 2¾
NA NA NA 23½ 29
171/16 18½ 22 32¼ 38¼
201/16 21½ 25 35¼ 41¼
1½ 1 11/8 11/8 1
G
Dimension I
Crate Dimensions
(H x W x D)
Shipping Weight
Air Intake
NA NA NA 6 1
31x23x28 31x23x32 32x23x40 33x29x42 35x33x56
132 160 215 311 450
280 375 800 1050 2500
Electrical Requirements
Volts
Hertz
Phase
Plug
1. Dimension A is the height of the unit. The unit width and depth (dimensions B and C) are the case dimensions, add
approximately 2 inches to include the plumbing connections. The depth case dimension for CFT-75s with "Turbulator"
tanks is 25¾".
2. Dimension D is the distance from the floor to the bottom of the unit case (height of the castors).
3. Dimension E is the distance from the floor to the center of the DRAIN connection (CFT-150/300 only).
4. Dimension F is the distance from the floor of the center of the OUTLET connection.
5. Dimension G is the distance from the floor of the center of the INLET connection.
6. Dimension H is the distance from the unit's left side to the center of the INLET and OUTLET connections.
7. Dimension I is the distance from the unit's left side to the center of the DRAIN connection (CFT-150/300 only).
8. Weights are given in pounds
9. Air intake is given in cubic feet per minute.
115V 115V 208/230V 208/230V 208/230V
60Hz 60Hz 60Hz 60Hz 60Hz
11113
NEMA5-15P NEMA5-20P NEMAL6-15P NEMAL6-20P NA
Rev 04/12/99
- 7 -
Pump Capacity
Bar PSI
0.7
10
0.5
0.4
Pressure
0.3
A=MD-30 60Hz
8
A
6
4
B
B=MD-30 50Hz
0.1
Bar PSI
4.0
3.4
2.7
2.0
Pressure
1.3
0.7
60
50
40
30
20
10
2
1 2 3 4 5 GPM
3.8 7.5 11.3 15.1 19.0 LPM
A
B
1 2 3 4 GPM
3.8 7.5 11.3 15.1 LPM
Flow
Flow
A=PD-1 60Hz
B=PD-1 50Hz
C
D
C=PD-2 60Hz
D=PD-2 50Hz
Bar PSI
Pressure
3.4
2.7
2.0
1.3
0.7
50
40
30
20
10
A=CP-55 60Hz
A
B
5 10 15 20 25 30 GPM
18.9 37.9 56.8 75.5 94.6 113.6 LPM
Flow
B=CP-55 50Hz
- 8 -
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