Filling And Venting On The Secondary Side - Viessmann VITOCAL 350-A Installation And Service Instructions Manual

Checking the refrigerant circuit for leaks
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
Work on the refrigerant circuit must only be car-
ried out by a certified contractor (in accordance
with Regulations (EU) No 517/2014 and
2015/2067).

Filling and venting on the secondary side

Unsuitable fill and top-up water increases the level of
deposits and corrosion. This can lead to system dam-
age.
Observe VDI 2035 regarding quality and amount of
heating water, including fill and top-up water.
■ Flush the heating system thoroughly before filling.
■ Only fill with water of potable quality.
■ If the fill and top-up water has a water hardness
greater than 16.8 °dH (3.0 mol/m
ened, e.g. using the small softening system for heat-
ing water: See the Vitoset pricelist.
Fig. 69
Drain valve
A
Manual air vent valve
B
1. Open any non-return valves installed on site.
Check the floor area, valves and all visible solder joints
for traces of oil.
Note
Traces of oil indicate a leak in the refrigerant circuit.
Have your heat pump checked over by a refrigeration
engineer.
!
Note
Before filling the system, observe VDI 2035 part 1.
3 ), it must be soft-
2. Check the pre-charge pressure of the expansion
Commissioning, inspection, maintenance
(cont.)
Please note
Escaping liquids can lead to electrical defects.
Protect electrical components of the heat pump
from escaping liquids.
vessel (see page 76).
75