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(d)
Disconnect the suppressor leads from the terminals
N2 and 7 on the terminal strip and remove.
(e)
Replace with a new suppressor and reassemble in
the reverse order. Refer to wiring diagram (Fig 28).
11.
TO REPLACE THE DHW OVERHEAT THERMOSTAT
Refer to Fig. 33.
(a)
Remove appliance front panel and top cover. (Sec-
tion 3).
(b)
Disconnect the thermostat leads at the terminal
strip in the left hand side of the control panel (4 and
5). Refer to the wiring diagram (Fig. 28) to ensure
that the correct leads are disconnected. Do not
leave any leads loose in the control box.
(c)
Release the strain relief bush by compressing the
loose section of the bush and carefully withdraw the
leads from the control box.
(d)
Remove the dhw overheat thermostat and fan sen-
sing tubes from the from the support clips on the
back of the baffle plate behind the control panel.
(e)
Remove the two M3 taptite screws holding the over-
heat thermostat to the flow pipe.
(f)
Fit a new thermostat and reconnect ensuring that the
strain relief bush has been replaced. Refer to the el-
ectrical wiring diagram (Fig. 29) to ensure the correct
connections are made.
(g)
Ensure the thermostat cable and fan sensing tubes
are clipped correctly to the back of the baffle plate.
NOTE: When fitting a replacement thermostat it is impor-
tant to ensure that no foreign matter is present on the
contact surfaces of both the thermostat and the mount-
ing bracket. During manufacture thermal grease is smea-
red on the surfaces and may be left.
Fig. 41
EARTH SCREW
c
HOT WATER
CONTROL
THERMOSTAT
CENTRAL
HEATING
CONTROL
THERMOSTAT
12.
TO REPLACE THE DHW CONTROL THERMOSTAT
(a)
Remove the appliance front panel, top cover and
facia. (Section 3).
(b)
Using a pair of long nose pliers pull the retaining
clip from the thermostat pocket adjacent to the
DHW inlet pipe on the top of the heat bank at the
rear and remove the thermostat phial. (Fig 44).
(c)
Remove the two M5 hex head screws, positioned
under the LHS of the control panel, which fix the
thermostats mounting plate in position. Draw the
plate forward as far as possible. (Fig 40) (Fig 41 ).
(d)
Remove the central clamping nut and washer.
(e)
Prise off the two electrical connections from the rear
of the thermostat.
(f)
Push the thermostat body back to disengage the
spindle from the mounting bracket.
(g)
Withdraw the thermostat threading the capillary
through the plastic grommet in the rear of the electrical
control box.
(h)
Fit the new thermostat and reassemble in the re-
verse
order.
The
capillary
of the
replacement
thermostat must be positioned at the top (Fig 41)
and must be uncoiled to assist its passage through
the control box opening. With the thermostat in
position the excess capillary
must
be recoiled,
without tight bends, and positioned so that it is be-
hind the control panel but not in contact with any
hot surface. Ensure that the retaining clip is repla-
ced into the thermostat pocket.
(j)
Refit the two push on electrical connectors at the
rear of the thermostat. Polarity is not important.
NOTE: During manufacture thermal grease is smeared
inside the thermostat phial socket and may be left.
13.
TO REPLACE THE CENTRAL HEATING CONTROL
THERMOSTAT
(a)
Remove the appliance front panel, top cover and
facia. (Section 3).
(b)
Using a pair of long nose pliers pull the retaining
clip from the thermostat pocket situated in the flow
pipe and remove the thermostat phial. (Fig 42).
(c)
Remove the two M5 hex. head screws positioned
under the LHS of the control panel which fix the
thermostats mounting plate in position. Draw the
olate forward as far as possible. (Fig 40;, (Fig 41 ).
(d)
Remove the thermostat central clamping nut and
washer.
(e)
Remove the two electrical connections from the rear
of the thermostat.
(f)
Push the thermostat body back to disengage the
spindle from the mounting bracket.
(g)
Withdraw the thermostat threading the capillary
through the plastic grommet in the rear o·f the electrical
control box.
(h)
Fit the new thermostat and reassemble in the re-
verse
order.
The
capillary
of the
replacement
thermostat must be positioned at the top (Fig 41)
and must be uncoiled to assist its passage through
the control box opening. With the thermostat in
position the excess capillary
must be recoiled,
without tight bends, and positioned so that it is be-
hind the control panel but not in contact with any
hot surface. Ensure that the retaining clip is repla-
ced into the thermostat pocket.
Fig. 42.
Domestic hot water
high limit thermostat
Domestic hot water
overheat thermostat
Safety valve
Centra heating
control thermostat
35
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