6
Installing the boiler
Logano G225/Logano plus GB225 - We reserve the right to make any changes due to technical modifications.
41
6.3
Filling the heating system and
checking for leaks
Check the heating system for leaks before commissioning
to ensure there are no leaks when the system is in
operation. Pressurise the heating system to 1.3x
permissible operating pressure (observe the response
pressure of the safety valve).
Fig. 59 Pressure gauge for sealed unvented systems
1
Red needle
2
Pressure gauge needle
3
Green range
V
Close the pressure expansion vessel against the
system by closing the cap valve.
V
Check the connections and pipework for leaks.
V
Open the mixing and shut-off valves on the heating
water (primary) side.
V
Connect hose to the water tap. Push a hose filled with
water onto the hose ferrule of the boiler fill & drain valve
and open the valve.
V
Open the cap of the automatic air vent valve by one full
turn to allow air to escape.
V
Slowly fill the heating system. Observe the pressure
gauge (
Æ
fig. 59) while doing so.
V
Close the water tap and the boiler fill & drain valve once
the required operating pressure has been reached.
V
Vent the heating system via the radiator bleed valves.
V
Top up with water if the pressure drops as a result of
venting the system.
V
Remove the hose from the boiler fill & drain valve.
Caution: Risk of system damage from
excess pressure when testing for leaks.
Pressure, control and safety equipment may
be damaged by excessive pressure.
V
When you carry out the leakage test,
ensure that no pressure, control or safety
equipment that cannot be isolated from
the boiler water chamber is fitted.
6 720 615 876-59.1RS
3
2
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