Checking Expansion Vessels And The Primary Circuit/ Heating Circuit Pressure; Commissioning The System - Viessmann VITOCAL 350-G Installation And Service Instructions Manual

Further details regarding the individual steps
■ 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
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.
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).
Commissioning, inspection, maintenance
3. Fill (flush) and vent the secondary cir-
cuit.
!
4.
3 ), e.g. with
5. Check system pressure. Top up with
water if required.
■ Minimum system pressure:
■ Permiss. operating pressure:
Note
The type and extent of the parameters
depend on the appliance type, on the
selected system scheme and the acces-
sories employed.
(cont.)
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.
0.8 bar (80 kPa)
2.5 bar (250 kPa)
71