Boiler installation
8
Logano G215 WS - We reserve the right to make any changes due to technical modifications.
37
8.2.4 Installing boiler fill and drain valve (accessory)
z
Seal in the boiler fill and drain valve on connector EL.
8.3
Filling the heating system and checking for leaks
Before commissioning the heating system, check for
leaks to prevent problems during operation. Pressurise
the heating system to 1.3x permissible operating
pressure (observe the safety pressure of the safety
vale).
z
Shut off the pressure expansion vessel from the
system by closing the cap valve.
z
Check the connections and pipework for leaks.
z
Open the mixing and shut-off valves on the hot water
(primary) side.
z
Connect the hose to the mains water tap. Push a
hose filled with water onto the hose ferrule of the
boiler fill & drain valve and open the valve.
z
Open the cap of the automatic air vent by one full turn
to allow air to escape.
z
Slowly fill the heating system. Observe the pressure
gauge whilst filling.
z
Close the water tap and the boiler fill & drain valve
once the required operating pressure has been
reached.
z
Bleed the system via the radiator bleed valves.
z
Top up with water if the pressure drops as a result of
bleeding the system.
z
Take the hose off the boiler fill and drain valve.
Fig. 55 boiler fill and drain valve, installing
EL
Fig. 56 Pressure gauge for sealed systems
1
Red needle
2
Pressure gauge needle
3
Green field
3
1
2
CAUTION!
SYSTEM DAMAGE
through overpressure during leak testing.
Pressure, control and safety equipment
may be damaged through excessive
pressure.
z
When you carry out a leak test, make
sure that no pressure, control or safety
equipment is fitted which cannot be
isolated from the boiler water chamber.
