Grant EUROFLAME 50/70 User, Installation And Servicing Instructions page 22

3.13.2 Fully pumped - (See Fig. 13)
3.13.3 Kitchen/Utility sealed system - (See Fig. 14)
1 The boiler is suitable only for use with a sealed
system complying with the requirements of BS
5449.
The maximum temperature of the central heating
water is 85°C.
2 The boiler is supplied with the following items
factory fitted:-
a A diaphragm expansion vessel complying with
BS 4814, pre-charged at 1.0 bar.
b System pressure gauge, with an operating range
of 1 to 4 bar.
c Pressure relief safety valve complying with BS
6759 and set to operate at 3 bar.
d Circulating pump with isolating valves.
e Automatic air vent.
f Filling loop. This must be isolated and
disconnected after filling the system.
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3 - GENERAL BOILER INFORMATION
Fig. 13 - Fully pumped system
3 The central heating system volume, using the
4 The system design pressure (cold) should be
5 If thermostatic radiator valves are fitted to all
6 Provision should be made to replace water lost
Fig. 14 - Sealed system
Euroflame Oil Boilers
expansion vessel as supplied, must not exceed the
volume shown in section 2.1. For further guidance
refer to BS 7074:1.
Refer to section 4.14 for further details of the
expansion vessel.
between 0.5 and 1.0 bar. This pressure is
equivalent to the maximum static head (see Fig.
14) in bar + 0.3 (1 bar = 10.2 metres of water).
radiators, a system by-pass must be fitted.
from the system. This may be done manually
(where allowed by the local Water Undertaking)
using the filling loop arrangement supplied with the
boiler.