Supplied By www.heating spares.co Tel. 0161 620 6677
18
221481C
GAS VALVE ASSEMBLY
Diagram 10.6
EXT. SCREW (4)
'O' RING
'O' RING
EXTENSION
SCREW (4)
THERMOCOUPLE
NUT
ELECTRICAL
CONNECTOR (2)
PILOT
TUBE
NUT
GAS VALVE
CONNECTORS
GAS SERVICE
COCK
(SHOWN OFF)
2414
INTERRUPTER
10 Servicing and Replacement of Parts
10.9 Piezo Unit
Gain access as in Section 10.3.
Disconnect the ignition lead and remove backing nut from the
piezo unit.
10.10 Ignition Lead
Remove controls cover and outer casing as above.
Release, but do not remove, the two screws securing the front
and rear gland plates. Pull the gland plates forwards, see
diagram 10.4.
Remove the ignition lead, when replacing ensure that the clear
end is fitted to the electrode.
10.11 Thermostat
Gain access as Section 10.3.
Remove and support the control box as Section 10.9.
Remove the control knob and electrical connections from the
thermostat body.
Release, but do not remove, the two screws securing the front
and rear gland plates. Pull the gland plates forward, see
diagram 10.4.
Remove the two screws securing the thermostat to the control
box. The thermostat may now be removed withdrawing the
capillary through the bottom of the air duct.
When replacing smear the thermostat phial with the heat sink
compound supplied, before replacing and securing with the
retainer in the pocket.
Diagram 10.5
THERMOSTAT
PHIAL/OVERHEAT
CUT-OFF
HEAT
EXCHANGER
THERMOSTAT
PHIAL
OVERHEAT
CUT-OFF
RETAINING
CLIP
CUT-OFF
SECURING
SCREW(S)
0951