Bosch HP270-2 - Legionella Disinfection and Air Defrost; Legionella Disinfection; Air Defrost Sequence Conditions

Page 11 from 56 6-720-821-364 SM HP270 – 250 - 200 2016/12 en
Legionela disinfection:
From both manual (instantaneous) and automatic (weekly operation) selection, the legionela function will assure
the COMBI mode operation during the 1
st
24 hours (compressor until T
top
> 60ºC and only E-Heater until T
top
>
70ºC), nevertheless and if this was not enough to complete LEG function, the HP switch to FULL mode.
Stop condition:
T
top
> 70ºC or T
bottom
> 60ºC or Leg function time > 48h (24 hours in combi and 24 hours in FULL)
Stop condition (only for HP270-3):
T
discharge
> 60ºC during 10 min or Leg function time > 48h (24 hours in combi and 24 hours in BOOST)
Conditions for air-defrost sequence:
Air defrost sequence is activated in both +5ºC / +35ºC and -10ºC / +35ºC models when 5ºC < T
air
< 10ºC for more
than 60 min and compressor is ON for more than 60 min as well with recurrence determined by the temperature
measured by T
bottom
sensor.
Pict.7 – Status diagram for air defrost
Condition HPAF0501/0701:
T
bottom
< 20ºC
(defrost every 90 min)
T
bottom
< 35ºC
(defrost every 360 min)
T
bottom
< 60ºC
(defrost every 840 min)
OFF
ON during 10 min
Water Pump OFF
OFF
Condition
HPAF0502/0702
HPAF0503/0703
T
bottom
< 20ºC
Or
Tair-Tfins > 6ºC
(defrost every 90 min)
Condition
HPAF2501/2701
HPAF2801
T
discharge
< 20ºC
Or
Tair-Tfins > 6ºC
(defrost every 90 min)