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► Connect the filling loop and fill the installation with clean
drinking water to a maximum pressure of 1-2 bar in the case
of a cold installation (Indicated on le display.)
► Bleed the appliance with the manual bleed screw.
► Bleed the air in the installation with the manual bleed
screws on the radiators.
► Top up the CH installation if the pressure has dropped too
far as a result of the air bleeding.
► Check all couplings for leakage.
► Switch on the boiler by touching the control panel just
above the power LED and holding this for 2 seconds.
► Put the boiler in operation using the room thermostat or
Service company (see §8.1.5) and check the operation.
Switch on boiler
2sec
Switch o boiler
2sec
Manual air vent
7.2.2 Domestic hot tap water facility
► Open the mains tap to bring the domestic hot water section
under pressure.
► Vent the changer and the piping system
by opening a domestic hot water tap.
Leave the tap open until all air has disappeared from the
system. Close the tap again.
► Check all connections for leakage.
► Vent the gas piping with the inlet pressure measurement
nipple on the gas valve.
► Check all connections for leakage.
► Check the inlet pressure and possibly the gas-air control;
see §8.9.
7.2.3 Gas supply
Inlet pressure
measurement nipple
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