7 x Service and maintenance
FA ROTEX HPSU compact 4 - 06/2015
43
11. Check the system water pressure on the RoCon HP controller
of the ROTEX HPSU compact.
Î Top up the water in the heating system if necessary, until
the pressure display is within the permitted range.(see
section 7.5).
12. Clea
n plastic surface of ROTEX HPSU compact with a soft
cloth and mild cleaning agent. Do not use any cleaners with
aggressive solvents (damage to the plastic surface may
occur).
13. Refit the cover (see section 7.2).
14. Servicing of the external unit and other heating components
connected to the ROTEX HPSU compact should be carried
out as specified in the respective associated installation and
operating manuals.
15. Comple
te the confirmation of servicing in the supplied
operating manual of the ROTEX HPSU compact.
7.4 Filling and topping up the storage tank
Without installed solar system
Ɣ Connect the filling hose with backflush prevention (1/2") to
the connection "DrainBack Solar - feed" (see fig. 7-2,
pos. 1).
Ɣ Fi
ll the storage tank on the ROTEX HPSU compact until
water comes out of the connection (fig. 7-2, po
s. 23), that
has been connected as the safety overflow.
Ɣ Disconnect the filling hose with backflush prevention (1/2")
again.
With KFE filling connection or with installed solar
system (see also chapter 6.1)
Ɣ Without solar system: KFE filling connection (accessory
KFE BA 16 52 15)
to the filling and drain connection of the ROTEX HPSU
compac
t (fig. 3-2 to fig. 3-5, pos. 10)
or
with the solar system: KFE filling
connection (accessory
KFE BA, 16 52 15) to the connecting elbow of the
control and pump unit (RPS3).
Ɣ Con
nect the filling hose with backflush prevention (1/2") to
the previously installed KFE cock.
Ɣ Fill the storage tank on the ROTEX HPSU compact until
water comes out of the connection (fig. 7-2, po
s. 23), that
has been connected as the safety overflow.
Ɣ Disconnect the filling hose with backflush prevention (1/2")
again.
CAUTION!
Filling the storage tank container with excessive water
p
ressure or with too high a flow speed can cause
damage to the ROTEX HPSU compact.
Ɣ Onl
y fill with a water pressure <6 bar and a flow
speed <15 l/min.
UK only!
CAUTION!
If filling or topping up the storage tank is done by
means of the boiler filling and drain valve, a temporary
filling loop must be used with the appropriate backflow
prevention device in accordance with clause G24.2,
Guidance to the Water Supply (Water Fittings)
Regulations 1999.
If the storage temperature falls below a certain
mini
mum value, the safety settings of the ROTEX
HPSU compact prevent the operation of the heat pump
in the case of low external temperatures:
– Ex
ternal temperature < -2 °C, minimum storage
temperature = 30 °C
– Ex
ternal temperature < 12 °C, minimum storage
temperature = 23 °C.
Without backup-heater:
The storage tank water must be heated to the minimum
required storage temperature by an external heater.
With Backup Heater (BUxx):
With an outdoor temperature < 12 °C and a storage
tank temperature
< 35 °C, the Backup Heater (BUxx) is
switched on automatically on in order to heat up the
storage tank water to at least 35 °C.
Ɣ In order to accelerate the heating process with
the back-up heater, temporarily
– Parameter [Funktion EHS] = "1"
and
– Set parameter [Leistung WW] to the maximum
value of the back-up heater.
– Switch the rotary switch to operating mode
and set the parameter [1x Warmwasser] to
"Ein". Following successful heating, reset the
parameters to "Aus".
Fig. 7-2 Buffer storage filling - without solar system
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