Checking The Refrigerant Circuit For Leaks; Charging And Venting On The Primary Side; Filling And Venting On The Secondary Side - Viessmann VITOCAL 350-G Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Checking the refrigerant circuit for leaks

Check the floor area, valves and all visi-
ble solder joints for traces of oil.
Note
Traces of oil indicate a leak in the refrig-
erant circuit. Have your heat pump
checked over by a refrigeration engi-
neer.

Charging and venting on the primary side

!
Please note
Avoid appliance damage.
Charge the primary circuit before
connecting the power supply.
1. Check the pre-charge pressure of the
expansion vessel.
2. Charge the primary circuit with
Viessmann heat transfer medium
and vent.
Note
Ensure frost protection down to
–19 °C.
Viessmann heat transfer medium is a
ready-mixed ethylene glycol-based
medium. It contains inhibitors for cor-
rosion protection. The heat transfer
medium can be used at temperatures
down to –19 °C.

Filling and venting on the secondary side

Unsuitable fill and top-up water increa-
ses the level of deposits and corrosion.
This can lead to system damage.
70
(cont.)
3. Check the connections for possible
leaks. Replace faulty or displaced
gaskets.
Observe VDI 2035 regarding quality and
amount of heating water, including fill
and top-up water.