71
■ Flush the heating system thoroughly
before filling.
■ Only fill with water of potable quality.
■ Soften fill water with a water hardness
above 16.8 °dH (3.0 mol/m
3
), e.g. with
the small softening system for heating
water: See the Vitoset pricelist.
!
Please note
Avoid appliance damage.
Protect electrical components
mounted on the casing door from
escaping liquids.
Note
Before filling the system, observe
VDI 2035 sheet 1.
1.
Open any on-site non-return valves if
installed.
2.
Check the pre-charge pressure of the
expansion vessel.
3.
Fill (flush) and vent the secondary cir-
cuit.
4.
!
Please note
Avoid appliance damage.
■ Check the secondary circuit
flow and return connections
to the heat pump for
tight-
ness
.
■ In the case of leaks, switch
off the appliance immedi-
ately, drain the water and
check the seating of the
seal rings.
Always
replace
displaced seal rings.
5.
Check system pressure. Top up with
water if required.
■ Minimum system pressure:
0.8 bar (80 kPa)
■ Permiss. operating pressure:
2.5 bar (250 kPa)
Checking expansion vessels and the primary circuit/heating cir-
cuit pressure
Observe engineering informa-
tion.
Technical guides for heat pumps
Commissioning the system
Commissioning (configuration, parame-
ter settings and function check) can be
carried out with or without the commis-
sioning wizard (see following chapter
and service instructions for the heat
pump control unit).
Note
The type and extent of the parameters
depend on the appliance type, on the
selected system scheme and the acces-
sories employed.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5546 267 GB
Service
