Filling And Venting On The Secondary Side; Charging And Venting The Solar Circuit - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Charging and venting on the primary side
3. Charge the primary circuit with Viessmann heat
transfer medium and vent.
Note
The system must be protected against frost down to
–15 °C.
!
Please note
To prevent equipment damage, check the
flow and return connections of the heat pump
primary circuit for tightness.
In the case of leaks, switch off the heat pump
immediately, drain the primary circuit and
check the seating of seals/gaskets. Replace
faulty or displaced gaskets.

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 Victaulic couplings must be form-
locked and fitted together seamlessly.
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 cir-
cuit with heat transfer medium, protect the col-
lector areas against insolation.
1. Check the pre-charge pressure of the expansion
vessel.
!
2. Please note
To prevent appliance damage,
charge the solar circuit exclusively with Tyfo-
cor LS.
56
(cont.)
4. Fill (flush) and vent the secondary circuit.
!
Please note
To prevent appliance damage, check the flow
and return connections of the heat pump sec-
ondary circuit for tightness.
In the case of leaks, switch off the heat pump
immediately, drain the secondary circuit and
check the seating of seals/gaskets. Replace
displaced gaskets.
5. Check the system pressure and top up with water if
required.
Minimum system pressure: 0.8 bar (80 kPa)
Permiss. operating pressure: 2.5 bar (0.25 MPa)
3. Vent the solar circuit.
Minimum system pressure: 1.7 bar (170 kPa)
Permissible operating pressure: 6 bar (0.6 MPa)
Note
In addition, observe installation and service instruc-
tions for the solar thermal system.