Immergas AUDAX TOP, Instruction And Recommendation Booklet

Page: 43 / 72

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4.2.6 Compressor heating control.
Attention: the compressor may be powered
when the unit is not in operation. The control
has the task of heating the compressor, by
applying current to the stopped compressor
instead of using a heater with resistors.
This control is to prevent the stagnation of
coolant inside the compressor.
4.2.7 Defrosting cycle.
When the outside air temperature is low and
the ambient humidity high, the probability of
brine forming on the air coil surface significantly
increases. The presence of brine on the air coil
may reduce the air flow in the coil and prevent the
proper operation of the unit. Where necessary,
the control starts the defrosting cycle to remove
the brine from the coil.
The cooling circuit is forced to Cool Mode during
the defrosting cycle. To prevent the hydraulic
circuit from cooling, you can start the electric
heaters in the pipes and the one in the unit plate
exchanger.
Attention: please note that the “defrosting”
and “home antifreeze protection” are two very
different operating modes. Defrosting is used
to remove the brine covering the external air
coil, while the home antifreeze protection is
used to maintain the minimum ambient tem-
perature stable.