Filling And Venting On The Secondary Side; Charging And Venting The Solar Circuit - Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Filling and venting on the secondary side

!
Please note
To prevent appliance damage,
fill the secondary circuit before
switching on the mains power.
Note
Before filling the system, observe
VDI 2035 part 1.
1. Check the Victaulic connections in
the heat pump for tightness. The Vic-
taulic couplings must be tight and fit-
ted together so that there are no
gaps.
2. Open any on-site non-return valves if
installed.
3. Check the pre-charge pressure of the
expansion vessel.

Charging and venting the solar circuit

Danger
Overheated collector areas and
overheated heat transfer medium
can cause burns/scalding and
equipment damage.
When working on the collector
and the solar circuit with heat
transfer medium, protect the col-
lector areas against insolation.
1. Check the pre-charge pressure of the
expansion vessel.
82
(cont.)
4. Fill (flush) and vent the secondary cir-
cuit.
!
Please note
To prevent appliance dam-
age, check the flow and return
connections of the heat pump
secondary circuit for tight-
ness.
In the case of leaks, switch off
the heat pump immediately,
drain the secondary circuit
and check the seating of
seals/gaskets. Always
replace displaced seals/gas-
kets.
5. Check the system pressure and top
up with water if required.
Minimum system pressure: 0.8 bar
Permiss. operating pressure: 2.5 bar
!
2. Please note
To prevent appliance dam-
age,
charge the solar circuit exclu-
sively with Tyfocor LS.
3. Vent the solar circuit.
Minimum system pressure: 1.7 bar
Permissible operating pressure:
6 bar
Note
Observe additional installation and serv-
ice instructions of the solar thermal sys-
tem.