© STULZ S.p.A. – all rights reserved IT/10.2021/i04
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
5.8.
Air circuit
The air circuit is composed by the condenser, the fan and the air filter.
5.8.1 Fan
The units have an axial fan, aspirant, with black metallic blades. The motor has mono-phase
power supply, with insulation class F. Motor protection degree is IP44. The fan has internal thermal
protection for overload.
The fan is always on when compressor is switch on.
Through some options, for chiller management at low ambient temperatures, there is the possibility
to have the following fan speed regulations:
•
On-off, to reach ambient temperature up to -5°C.
•
Speed modulation, with phase cut module. Apply to reach ambient temperature up to -10°C.
5.8.2 Condenser
Consisting of copper pipes and aluminium fins to maximise the thermal exchange yield between
the overheated gas and the environment.
It is positioned in the left front side of the chiller. A washable polyurethane filter can be installed as
accessory to protect the condenser.
5.8.3
Air filter
The installation of the air filter at condenser entry, made of:
•
n°1 polypropylene honeycomb air filter, black coloured, with frame and nets in galvanised
welded sheet
•
n°2 brackets for the interlock fixing of the filter to the condenser
•
small parts for a correct installation
The filter is washable with blowing of compressed air.
For the cleaning, when chiller is off, proceed as follows:
1.
Remove the interlocked frontal panel of the chiller
2.
Unlatch the filter from its supporting brackets.
3.
Clean the filter, blowing air in opposite direction of chiller flow. Don’t clean the filter with cleaners
or water jets. Verify the integrity of the filter and substitute if necessary.
4.
Reposition the chiller and verify it’s stable.
5. Reposition the frontal panel of the chiller.
5.9.
protection and control electric components
5.9.1 main disconnection switch
A main disconnection switch is installed on the front panel next to the electronic generator. This
is a safety device that allows the chiller to be disconnected from the power supply immediately.
5.9.2 motor protection devices
Circuit breakers are installed on the power supply lines of the single electric utilities to protect
against short-circuits and over-currents
The ignition is adjusted by the manufacturer and it must never be modified.
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