Wolf CGB-35, Installation Instructions Manual

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BDF tap
Filling the system
Fig.: Control unit overview
Fig.: BDF tap (valves, accessory)
Fig.: Air vent valve at the heating circuit pump and at the
cylinder primary pump
Air vent screw
Automatic air vent valve
Fig.: Automatic air vent valve
Fill the system and vent it properly, to safeguard the
perfect function of the gas fired condensing boiler.
Before connecting the gas fired conden -
sing boiler to the heating system, flush
the entire system to remove residues
such as welding pearls, hemp, putty,
etc. from the pipework.
- With the boiler in a cold condition, fill the heating sys -
tem slowly via the return pipe, until 1.5 bar pressure
is indicated. Inhibitors are not permissible.
- Check the entire system for water leaks.
- Fill the condensate siphon with water.
- Close the gas tap.
- Open the manual air vent valve.
- Open the cap of the automatic air-vent valve
(on the heating circuit pump) by one revolution, but
do not remove the cap.
- Open all radiator valves.
- Open all flow and return valves on the gas fired con -
densing boiler.
- Fill the system to 2 bar pressure. In operation, the
pressure gauge must indicate between 1 and 2.5
bar.
- Start the gas fired condensing boiler, set the heating
water temperature selector into position "2" (pump
running, illuminated ring (status display) constantly
green).
- Vent the pump; for this, briefly open and then retighten
the air vent screw.
- Vent the heating circuit; for this, switch the condensing
boiler ON and OFF several times.
- Top up with water when the system pressure drops
severely.
- Close the manual air vent valve.
- Open the gas shut-off valve.
- Press the reset button.
Note: In constant operation, the heating circuit will be
automatically vented via the heating circuit
pump.
ON/OFF switch Thermomanometer Reset button
NB