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6-720-821-364 SM HP270
– 250 - 200 2016/12 en
o
Changes in Air Defrost sequence
(Attention: only +5ºC / +35ºC model)
Current Behaviour:
Air defrost sequence is activated when 5ºC < T
air
< 10ºC for more than 60 min and compressor is ON for more than
60 min. the nº of cycles depends on detection of following additional conditions.
Condition (HPAF0702 / HPAF0703):
T
bottom
< 20ºC
Or
T
air
- T
fins
> 6ºC
(defrost every 90 min)
Pict.8 – Air Defrost Sequence
New Behaviour (only in HPAF0703):
In addition to current function in +5ºC / +35ºC models an additional air defrost sequence is programmed. When 0ºC
< T
air
(3d) < + 5ºC will last for more than 60 min and compressor is ON for more than 60 min, the evaporator defrost
will start. The fan will run during 45 min to defrost evaporator and in the meanwhile the electric heater will heat up
the water.
Condition (HP 1701 + 2701):
Compressor is ON for more than 60 min and
T
air
-T
fins
> 3.5ºC for more than 1 min or T fins < -17ºC
Pict.9 – Air Defrost Sequence
Fan ON during 10 min
T
bottom
Water Pump OFF
Compressor OFF
Fan ON during 45 min
Water Pump OFF
Compressor OFF
