MAINTENANCE INSTRUCTIONS
27
3
2
1
3 bar
1.5 bar
0.5 bar
1.2 bar
GREEN AREA
AIR VENT VALVE
AIR VENT VALVE PLUG
PUMP
PUMP PLUG
R
M
4.2 Filling the system
Check the properties of the water supply and
install the appropriate treatment devices if
the mains water has a hardness rating more
than 25 °f i
n
order to prevent scaling and
eventual damage to the D.H.W heat
exchanger.
Use only clean tap water to fill the system.
Once the water pipes have been connected, close the
gas feed valve and fill the system as follows:
• Check that the circulation pump runs freely.
• Check that the plug of the air vent valve has been
slackened slightly to allow air to escape from the
system (fig.1).
• Open the filling tap R (fig. 2), use the pressure
gauge M (fig.2) to check that the systems
pressure reaches the middle of the green area
(equal to 1,2 bar, see fig. 3).
• On completion, make sure that the filling tap R
is perfectly closed.
• Unscrew the plug on the pump to remove any
trapped air, check that the pump is free then re-
tighten it when water starts to flow out.
• Open the air vents on the radiators and monitor
the air evacuation process. When water starts to
flow out of the radiators, close the air vents.
• If, after the above operations, there is a reduction
in the pressure, re-open the filling tap R until the
pressure gauge reads 1,2 bar (fig.3).
To Next Page
Loading...
Need help?
General
