Initial Operation - Wolf KGW Series Installation And Maintenance Instructions Manual

Chiller
(direct evaporator)
Washer
Sludge remover:
(option)

Initial operation

Before filling the chiller system with refrigerant, adopt suitable measures to ensure
that no traces of moisture are left in the piping system (e.g. by evacuation or by
flushing with dry nitrogen).
Check the air-discharge temperature: min. air-discharge temperature +2 °C, at air-
discharge and refrigerant temperatures lower than + 2 °C there is a danger of the
heat exchanger icing.
Caution: The direct evaporator can achieve its rated performance only if the
refrigerant employed as the basis for calculating the design rating is used (R22 or
R134a).
Do not permit refrigerant to evaporate into the atmosphere: use a suitable vacuum
extractor.
- Check the piping and the pump for leaks.
- Make sure the nozzle stem and the nozzles are securely seated.
- Check that the siphon drain line is free of obstruction.
- Fill the siphon with water.
- Fill the washer tray until water drains off through the siphon.
- Briefly start the washer pump and check the direction of rotation; reverse the
direction of rotation if necessary.
Check the current consumption of the pump motor.
Do not permit the washer pump to run dry.
Caution
The pump will suffer severe damage if it runs dry.
- Switch on the air-intake fan.
- Switch on the washer pump.
- Adjust the float valve: the water level in the tray must be at least 10 mm above
the pump intake and max. 10 mm below the overflow outlet.
- If fitted: adjust dry-run cut-off and automatic desalination (see separate enclosed
instructions).
Note: On account of its surface structure, a new drip separator will sweat
drops of water for a limited period of time.
This is not a technical defect.
Adjust the manually operated valve to set the sludge-removal rate.
(This rate depends on the hardness of the water and the quantity of dust in the air.
As a rule of thumb, take twice the quality of evaporated water).
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