CF Series Portable Chiller : Air & Water-Cooled : 5 - 40 Tons
Page: 39
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: [email protected]
B.
Water-cooled units:
1.
Water regulator valve. Adjust condenser water regulator valve to maintain
100°F to 105°F refrigerant condensing temperature*. If valve is defective, have
valve repaired or replaced by a refrigeration serviceman.
2.
The water regulator valve is normally factory set for proper operation. When field
adjustments are required, turn the adjusting nut on the top of the valve counter
clockwise to raise the refrigerant pressure and clockwise to lower the pressure.
Adjustments should be made only when the chiller is running at full load.
3.
Insufficient condenser water flow. Check condenser water pumping system.
4.
Condenser water temperature too high. Check cooling tower for proper
operation if used and the city water temperature if city water is used.
5.
Condenser water tubes scaled. Clean with brushes and chemicals approved by
the Advantage Service Department.
C.
Improperly set high pressure control. Have refrigeration serviceman reset or replace
the control if defective.
4.4 SHUTS OFF ON LOW PRESSURE CONTROL
Note: Units may be equipped with either an adjustable or non-adjustable “fixed” low
pressure switch. The adjustable or fixed low pressure switch will automatically resets
when the pressure rises above the cut-in pressure. If this does not occur contact the
Manufacturer’s service department for instructions.
If the unit low pressure limit is activated three (3) consecutive times
during start-up the unit will lock out and will not be allowed to start.
When the chiller control locks out due to low pressure after three (3)
attempts, there is a problem that must be resolved before the unit
should be restarted. To re-start, the unit must be powered down and
back on. This should only be attempted after the cause of the low
pressure condition has been found and the issue has been resolved.
Repeatedly re-starting the unit will cause damage to the unit often
including freezing and rupture of the chiller evaporator.
The low pressure switch is set to cut-out at 32°F and cut-in at 36°F -
39°F*. If a low pressure condition exists for more than five seconds
the compressor will stop and a “L-P” fault will appear in the display
window.
After the refrigerant pressure rises above the cut-in pressure, a
three minute time delay will occur before the compressor restarts. This will protect the
evaporator and compressor from damage should a problem occur in the refrigeration
system or if the chiller is operated under circumstances which could cause damage to the
refrigeration system.
A.
Low or no water flow through the evaporator. Adjust the flow per section 3.2.C.
* See Temperature-Pressure
chart in Section 8.2 for
refrigerant pressure.
Adjustable Low
Pressure Switch
Fixed Low
Pressure Switch
* See Temperature-Pressure
chart in Section 8.2 for
refrigerant pressure.
Summary of Contents for CF Series
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