EN/10.2021/i04 © STULZ S.p.A. – all rights reserved
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
8.2.
Checks to be performed after start up
•
Make sure no alarms are displayed.
•
Make sure that the fan runs correctly and guarantees correct air flow to the condenser without
recirculation.
•
Make sure that the power supply voltage remains within the limits allowed when the unit is
running.
•
Make sure that the water temperature is close to the value set on the electronic controller.
•
After 30 minutes of compressor operation, check the presence of leaks and proceed refilling
R134a refrigerant, according to the instructions provided at paragraph 9.3.
•
Make sure that the current consumed by the electrical components (compressor, fan, and
pumps) falls within the maximum values indicated in the technical sheets.
•
Make sure that the tank liquid level is beyond the “min” limit but not beyond the “max” limit
indicated on the level indicator.
•
Make sure that the work pressure detected on the pressure gauge matches with the characteristic
curve of the pump installed at the power supply frequency (“6.5. Pressure losses”). If required,
adjust it in order to take the pressure back to the pump operation field.
•
In the presence of reduced load loss of the unit external hydraulic circuit, install a shutter on
the supply pipe to take the pressure within the pump operation field. Lock the shutter until the
required value is reached.
8.3.
Deactivation
Deactivation for maintenance
To switch the unit off:
•
Press ON-OFF on the display to stop the chiller.
•
Once the chiller is OFF, disconnect the power supply from the unit setting the main disconnection
switch to 0 (OFF).
DANGER
The ON-OFF button on the display keyboard is not a safety device to disconnect the power
supply before start up or maintenance operations.
Emergency plan
Disconnect the power supply from the unit using the main disconnection switch (0=OFF).
Stopping the system
In case of long periods of non-use during winter, we recommend checking the minimum ambient
temperature that can be reached. If this is lower than the freezing point of the liquid introduced in
the hydraulic circuit, discharge and drain the circuit completely.
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