51
fig. 88
GW 473/0
fig. 89
GW 458/0
fig. 87
GW 472/0
7.17.1 Replacement of diverter
valve diaphragm
(fig. 87).
•
Remove diverter valve as in Section
7.17
•
Remove the 4 screws (1).
•
Lift top off diverter valve and remo-
ve diaphragm.
•
Replace in reverse order.
•
Carry out electrical checks
(see Section 5.1).
•
Refill and repressurise the boiler
(see Section 5.4).
7.18 Replacement of pressure
gauge (fig. 88)
•
Turn off boiler as in Section 7.1.1.
•
Release CH water pressure and
drain boiler as in Section 7.1.2.
•
Remove front casing as in Section
7.1.3.
•
Lower front control panel as in
Section 7.1.6.
•
Undo union (1) at rear of pressure
gauge, depress side springs on
pressure gauge with a screwdriver
and pull forward to remove.
•
Replace in reverse order.
•
Refill and repressurise the boiler
(see Section 5.4).
7.19 Replacement of water
section
•
Isolate boiler from the mains
supply.
•
Turn off mains water isolating valve
and open a hot tap.
•
Remove front casing as in Section
7.1.3.
•
Lower front control panel as in
Section 7.1.6.
•
Undo union (1, fig. 89) remove
spring clip (1, fig. 90) by lifting,
pull pipe (2, fig. 90) forward and
remove.
