Specifications

8.33 Ghange of
expansion
vessel
8.33.1 Domestic water
side
Disconnect
the tubing nut
(W1),
unscrew
bracket securing screw and remove
expansion
vessel
complete with bracket.
Unscrew vessel
from
bracket. Reassemble with new
domestic
water
expansion vessel in reverse
order.
8.33.2
Heating
system open flued
appliances
Disconnect the flue
at split collar. Remove
2
screws and
nuts,
securing the upper
retaining
frame. Lift rear
of
frame
clear
of side frames
and
rest it
on top of draught
diverter. Remove
screws securing draught diverter
and remove
together with upper retaining
frame. Remove
draught
diverter
retaining
frame
by removing
the
2
retaining
screws. Undo the union nut
(W3),
move the
expansion vessel
up and take it
off.
Reassemble
in reverse
order, taking
care
that the expansion vessel
is correctly fixed
into
the 2
supports. Use
new
washer, if necessary.
8.33.3
Heating
system balanced flued
appliance
lsolate electrical mains
and remove mains
cable. Close off water
and
gas
service
cocks
and drain
the
appliance as outlined in
8.1.2.
Disconnect flow and return
connections
at
compression
joints
on
top
of service
cock.
Disconnect
gas
connection
at compression
joint
on
top
of
gas
cock. Disconnect
domestic
hot
and cold connections on
diaphragm
body.
Slacken
locking
nuts on flow
and return
connections. Remove nuts from
bolts
(1
in
fig. 14)
on
terminal/duct
assembly Rerirove
boiler
from
wall. Disconnect
sleeve nut
(W3)
and remove expansion vessel.
Reassemble in
reverse
order, taking care that the
expansion
vessel is correctly fixed to
the 2 supports.
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44
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