Installation manual

Installation and servicing instructions strictly reserved for qualified gas installers
43
Legend
1 Heat exchanger retaining screws
2 Gasket
3 Viewing window gasket
4 Viewing window circlip
5 Gasket
6 Ignition and controle electrode gasket
7 Ignition and controle electrode
8 Ignition and controle electrode
connector
9 Ignition and controle electrode
retaining screws
10 Ignition module harness connector
11 Ignition module retaining screws
12 Fan connector
13 Mixing arm
14 Heat exchanger hanging brackets
15 Burner assembly retaining screws
16 Insulation
17 Heat exchanger retaining nuts
18 Spring leaf
19 Viewing window
20 Heat exchanger hydraulic coupling
21 Gasket
22 Ignition module
23 Mixing arm retaining screws
24 Gasket
25 Gas valve connector retaining screw
26 Gas valve connector retaining plate
27 Burner retaining screws
28 Gas valve connector
29 Gas valve retaining clip
30 Burner
31 Heat exchanger
32 Combustion chamber
33 Fan
34 Fan retaining screws
35 Gas valve
14.5.1 Ignition and controle electrode
Remove the ignition and controle
electrode connector (8).
Remove the 2 ignition and controle
electrode retaining screws (9).
Remove the ignition and controle
electrode (7).
Clean both ends of the electrode with a
dry cloth if necessary
.
Inspect the tips for damage.
Clean away any debris and check the
spark gap is 3.5 to 4.5 mm.
Check the electrode gasket for signs of
damage and replace if necessary
.
14.5.2 Burner
Disconnect the gas supply at the gas
service cock.
Remove the two gas pipe retaining
clips (29), one located below gas valve
(35) and the other one located on the
underside of the boiler chassis.
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Pull sealing grommet down gas pipe.
Push the gas pipe upwards further into
gas valve connection and then rotate
anti-clockwise until the gas pipe end
is over the large hole in boiler chassis.
Withdraw the gas pipe from gas valve
connection and remove.
Note : When replacing ensure that the
sealing grommet, situated below the
gas valve is correctly re-seated.
Disconnect the gas valve connector
(28).
Disconnect the fan connector (12).
Remove the five heat exchanger
retaining nuts (17).
Gently remove the fan (33), gas valve
(35) and burner assembly from the heat
exchanger (31).
Clean the burner with a soft brush
taking great care not to damage the
front insulation.
Do not use wire or sharp instruments to
clean the holes of the burner
.
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