26
1. Completely
fill the DHW cylinder.
Open the highest hot water draw-off point. Leave it
open (under supervision) until only water is flowing
out.
2.
Check the fittings for leaks and tighten if neces-
sary.
Filling the solar thermal system (only for type WWKS)
Solar collector service instructions
Checking the safety valve function
Check the function of the safety valves according to
the manufacturer's instructions.
Checking the condensate drain
1.
Check the drain hose is seated correctly on the
condensate drain.
Note
To prevent water leaking out, never twist the con-
densate drain connector on the appliance.
2.
If necessary, clean the condensate pan (EPP base
with integral drip tray).
3.
Check that the condensate can drain freely. Flush
the condensate drain if necessary.
4.
Check for leaks.
Checking the refrigerant circuit for tightness
Danger
The refrigerant is a non-poisonous gas that dis-
places air. Unregulated escape of refrigerant in
enclosed spaces can lead to breathing difficul-
ties and suffocation.
■
Ensure adequate ventilation in enclosed
spaces.
■
Always observe regulations and guidelines on
handling this type of refrigerant.
Danger
Direct contact with refrigerant can be harmful to
skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
Work on the refrigerant circuit must
only
be car-
ried out by a certified contractor (in accordance
with EC 842/2006 and 303/2008).
1.
Check the valves and visible solder joints for traces
of oil.
Note
Traces of oil indicate a leak in the refrigerant cir-
cuit. Have the DHW heat pump checked by a
refrigeration engineer.
2.
Check the DHW heat pump interior for refrigerant
leaks with a refrigerant leak detector or leak detec-
tion spray.
Commissioning, inspection, maintenance
Filling the DHW cylinder on the DHW side
5788 057 GB
