Grant EUROFLAME 50/70 User, Installation And Servicing Instructions page 28

3 Ensure that the flexible filling loop is fitted between
the shut off valve on the mains water supply and the
double check valve on the heating system.
4 Open the mains shut off valve and then gradually
open the valve on the double check valve until
water is heard to flow. The valves are fully open
when the operating lever is in line with the valve
body and closed when it is at right angles to it.
5 Fill the system until the pressure gauge indicates a
pressure of approximately 1.5 bar. Close both the
filling loop valves and check the system for water
soundness, rectifying where necessary.
6 Vent each radiator in turn, starting with the lowest
in the system, to remove the air.
7 It is important that the circulating pump is properly
vented to avoid it running dry and damaging its
bearings. Undo the cover in the centre of the pump,
insert a suitable screwdriver into the end of the
pump shaft and rotate it at least one complete turn.
Replace the plug.
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4 - BOILER INSTALLATION
8 Check the operation of the safety valve (see Fig.
9 Continue to fill the system until the pressure gauge
10 The system design pressure (cold) should be
11 On completion of filling, ensure that both filling loop
Fig. 20- System boiler components
Euroflame Oil Boilers
20) by turning the head anticlockwise until it
clicks. The click is the safety valve lifting off its
seat allowing water to escape from the system.
Check that this is actually happening, and water
flows unobstructed from the relief discharge pipe.
indicates 1.0 bar. Close the filling valve and cold
water inlet valve and check the boiler and system
for water soundness, rectifying where necessary.
Water may be released from the system by
manually operating the safety valve until the
system design pressure is obtained.
between 0.5 and 1.0 bar. This pressure is
equivalent to the maximum static head in bar + 0.3
(1 bar = 10.2 metres of water). See Fig. 14.
Set the adjustable pointer on the pressure gauge to
the system design pressure.
valves are closed and disconnect the flexible hose.