Expansion Vessel - Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

PARTS REPLACEMENT
Fig. E.8: Expansion vessel
50
1
3
4

Expansion vessel

Please note: In the unlikely event of a
failure of the CH expansion vessel
follow procedure depending upon the
installation circumstances.
Boiler installed with top connection
air/flue duct to left/right hand side,
or vertical flue installation (where
500 mm clearance exists about the
boiler).
Refer to the important information
and initial preparation on page 45.
Release central heating water
pressure.
Disconnect union (1) from
2
expansion vessel.
Slide the expansion vessel (2)
upwards to remove from the boiler.
Replace in reverse order.
Boiler installed with top connection
air/flue duct to the rear, rear flue
system or vertical flue installation
(where less than 500 mm clearance
exists above the boiler).
EITHER
Remove the boiler from the wall as
follows:
Refer to important information and
initial preparation on page 45.
Release central heating water
pressure.
Disconnect external wiring from
boiler wiring terminal box.
Disconnect flow and return
connections at union nuts between
service valves and boiler.
Disconnect gas connection at
compression joint on gas valve
outlet.
Disconnect domestic hot and cold
water connections at union nuts.
Disconnect the flue from the top of
the boiler.
Remove the boiler from the wall.
Disconnect union (1) from expansi-
on vessel.
Slide the expansion vessel (2)
upwards to remove from the boiler.
Replace in reverse order.
Re-mount the boiler.
OR
A suitable replacement expansion ves-
sel can be fitted externally to the boi-
ler as previously described (if possible
on the central heating return in an
accessible position). In these circum-
stances, the replacement vessel must
be correctly sized ignoring the origi-
nal expansion vessel, which can be
left in position on the boiler.