SERVICING
& SPARES
INSTALLATION & SERVICING INSTRUCTIONS
41
8 716 115 216b (09.2008)
REPLACEMENT PARTS
REPLACEMENT PARTS
Electrode assembly:
Switch off the master switch.
Isolate appliance from the power supply.
Move control panel into service position.
Release 4 screws to remove inner case
door.
Remove the leads from the electrodes.
Unscrew the two fixing screws (B) and
carefully remove the electrode assembly
(A).
Replace and re-connect the assembly
taking care not to mislay the inspection
window.
After re-assembly check CO/CO2 levels
as described in the section “Setting the
air/gas ratio”
Burner:
Check that the gas cock is turned off and
the master switch is in the OFF position.
Isolate appliance from the power supply.
Remove the clips (C1), castellated nuts
(C) and springs (C3) from the studs (C).
Unscrew and remove the 2 hexagon
screws (D) securing the fan.
Remove nut and washer (E1) from the
rear stud (E).
Remove the burner coverplate (F).
Remove the burner (G).
Re-assemble the new burner in reverse
order, inspect seal (H) for damage and
replace if necessary.
After re-assembly check CO/CO2 levels
as described in the section “Setting the
air/gas ratio”
Primary heat exchanger:
Isolate appliance from the power supply.
Turn off all isolation valves.
Drain down appliance.
Move control panel into service position.
Remove inner case door.
Remove fan assembly, burner, gas mixing
tube.
Disconnect and remove sensors
connected to heat exchanger.
Remove condensate trap.
Remove internal flue elbow and tube
from boiler sump.
Disconnect return pipe union (J) at the
base of the boiler heat exchanger.
Remove plastic nut (K) from the base of
the inner casing.
Remove heat exchanger from inner casing.
Ensure heat conductive paste is used on
sensors when refitting.
Check the seals and replace if necessary.
After re-assembly check CO/CO2 levels
as described in the section “Setting the
air/gas ratio”
C1
D
G
H
C
E1
B
A
F
J
K
C2
C3
E
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