Ravenheat RSF 82E, Installation And Servicing Instructions

Page: 37 / 50

7.27.6
Replace in reverse order.
7.20
Fig. 62
Fig. 83
7.28.1
7.28.2
7.28.3
7.28.4
7.28.5
7.28.7
7.28.8
7.28.9
TO REMOVE/REPLACE THE CENTRAL
HEATING EXPANSION VESSEL
In the unlikely event of failure of the central
heating expansion vessel it is recommended
a suitable expansion vessel be fitted exter-
nal to the boiler. It should be positioned on
the return pipe and as close to the boiler as
possible (Fig. 7).
However, if it is necessary to replace the
central heating expansion vessel the boiler
must be removed from the wall as follows.
Remove the front panel from the outer cas-
ing (sect. 7.3) and lower the instrument
panel (sect. 7.16.2 & 3) and remove the
control box cover (sect. 7.31.213).
Remove the lower grating (sect. 54.2).
Remove the two sides of the casing (sect.
5.4.5).
Close the on/off valve on the domestic cold
water, central heating and gas supply.
Drain domestic water from the lowest hot
water tap and drain point on DHW inlet
cock (Fig. 46).
Drain the boiler (Fig. 93).
Disconnect all pipework connected to boiler.
Disconnect mains cables and any other con-
nections (room thermostat, programming
clock).
Remove the duct proceeding in reverse
order as described in (sect. 5.5 or 5.7).
Remove the 2 lower coach bolts and
release 2 top coach bolts then remove boil-
er from the wall.
7.28.10 Unscrew the nut that connects the expan-
sion vessel and remove it (Fig. 91).
7.28.11 Remove the screw supporting expansion
vessel (Fig. 91).
7.28.12 Remove the expansion vessel.
7.28.13
Replace all the components in reverse order
using new seals.
7.28.14 Fill the system as described in the sect. 6
and check for leaks.
7.29
TO REMOVE/REPLACE THE AIR
AUTOMATIC VENT (Fig. 92)
7.29.1
Remove the front panel from the outer cas-
ing and the combustion chamber front
cover (sect. 7.3 & 4).
7.29.2 Remove the lower grating (sect. 5.4.2)
7.29.3
Remove the fan assembly and the flue
38