75
3.
Fill (flush) and vent the secondary cir-
cuit:
■ Slightly open the quick-action air
vent valve (see safety assembly,
chapter "Connecting the secon-
dary circuit"); it remains open.
■ Open the DHW heating air vent
valve (see following chapter); it
remains open.
■ To vent, move the 3-way diverter
valve for "Heating/DHW heating"
with the lever to its centre position
and click into place (see diagram).
4.
!
Please note
To prevent equipment dam-
age, check the flow and return
connections of the secondary
circuit at the heat pump for
leak tightness
.
In case of leaks, switch off the
appliance immediately, drain
the water and check the seat-
ing of the seal rings. Always
replace dislodged seal rings.
5.
Check the system pressure and top
up with water if required.
Minimum system pressure: 0.8 bar
Permiss. operating pressure: 3 bar
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5600 950 GB
Service
