Wolf CGS-2-14/120L Installation Instructions Manual page 54

Filling the heating system
To ensure correct function of the condensing boiler, fill
the system as instructed, vent it completely and fill the
trap.
We recommend using a sludge separator with integral
magnetite separator in the heating appliance inlet to
protect the high efficiency pump and the appliance.
This is particularly relevant for old systems and mixed
installations.
Before connecting the heating system, flush it
Please
to remove residues such as weld beads, hemp,
note
putty, etc. from the pipework. Check the dirt
filter.
• T h e g a s c o n d e n s i n g b o i l e r m u s t b e o f f .
Close the gas ball valve.
• Open the cap of the automatic air vent valve on the
high efficiency pump by one revolution.
• Open all radiator valves.
Open the flow and return valves on the boiler.
• Slowly fill the entire heating system and boiler in a cold
condition to approx. 2 bar via the return.
Please
Inhibitors and antifreeze are not permitted.
note
• Bleed all radiators with a bleed key and if the system
pressure drops significantly, top up with water to 2 bar.
• Check the entire system and all component unions
for water leaks.
If leak tightness cannot be ensured, there is a
risk of water damage.
• Switch ON the condensing boiler at the red ON/OFF
switch in the WOLF logo (pump will run).
• Briefly open the manual air vent valve until all air has
escaped and then close it again.
54
25. Filling the heating system/trap
Shut-off valve, Gas ball valve
flow
Fig.: Gas connection: Risk of poisoning or explosion in the event of
gas escaping
Automatic
air vent valve
Fig.: Automatic air vent valve on the heating circuit pump
Pressure gauge
Fig.: Pressure gauge
Fig.: Manual air vent valve
Shut-off valve,
return
Bild: Heizkreispumpe
Slightly open the
manual air vent valve
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