Filling The System - Wolf CGG-1K-24 Installation And Operating Instructions Manual

Filling the system

Internal filling Drain valve
facility
(option)
Procedure for boilers with internal
filling facility
Procedure for boilers without inter-
nal filling facility
3062087_1108
Filling the system
Fill the system and vent it thoroughly to safeguard the perfect function
of the gas fired boiler.
The heating water must not be mixed with inhibitors or antifreeze;
otherwise leaks and flooding could result.
- Before connecting the gas fired boiler to the heating system, flush the entire system
to remove residues such as welding pearls, hemp, putty, etc. from the pipework.
- Fill the DHW system of the boiler until water flows out of a DHW draw-off point.
- 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 and the shut-off valves on the heating water side of the
boiler.
- Fill the entire heating system and boiler via the filling facility or an on-site fill & drain
valve up to approx. 1.5 bar, whilst simultaneously venting the heating system.
- Close the shut-off valves on the heating water side of the boiler (flow and return).
- Push the drain hose onto the drain valve of the hydraulic assembly.
- Flush all air out of the heat exchanger by simultaneously opening the internal filling
facility and the drain valve on the hydraulic assembly.
- Fill the entire heating system and boiler via an on-site fill & drain valve up to approx.
1.5 bar, whilst simultaneously venting the heating system.
- Close the return shut-off valve on the heating water side of the boiler.
- Push the drain hose onto the drain valve of the hydraulic assembly.
- Flush all air out of the heat exchanger by simultaneously opening the on-site fill &
drain valve and the drain valve on the hydraulic assembly.
- Remove the drain hose and open the boiler shut-off valves on the heating water
side again.
- Open the gas ball valve.
- Start the boiler, set the heating water temperature selector to position "2" (pump
running, illuminated signal ring (status display) constantly green).
- Vent the pump; for this, briefly open and then retighten the air vent screw.
Top up with water when the system pressure falls severely.
- Open the gas shut-off valve. Press the reset button.
- In constant operation, the heating circuit will be automatically vented via the hea-
ting circuit pump.
15