Download G2203!Service Manual

3.6.2 Removal of the Electrode
Remove igniter lead connection from electrode nut
located below pilot burner bracket. Tilt electrode
slightly to clear pilot burner hood and withdraw
upward from pilot burner bracket. Replace in reverse
order.
3.8 MULTIFUNCTIONAL GAS CONTROL
The unit is fitted with a Robertshaw 7000 BMVR
control which incorporates cock, governor, valve and
flame failure device.
3.8.1 Removal of Multifunctional Control
Isolate the main gas supply.
Disconnect thermocouple connection on MFC and
3.7 THERMOSTATS
The user thermostat is a Robertshaw RX model, snap pull thermocouple clear. Undo thermopile
action electric control with a centre stem adjustment connections and withdraw. Undo main gas inlet and
outlet connections to MFC and withdraw control.
of temperature.
Replace in reverse order taking care when
The safety stat is an EGO model with interrupter with reconnecting thermocouple. DO NOT overtighten as
a maximum fixed setting of 110oC. This interrupts the this may cause damage, hand tight plus a quarter turn
thermocouple signal from pilot and will subsequently is sufficient.
shut down the gas supply if pan boils dry.
3.8.2 To Clean the Main Valve
Note
Manual intervention is required to reset control in
event of cut-out.
To Reset
Push safety thermostat button when pan temperature
drops below 110oC.
3.7.1 Removal of Operating Thermostat
Isolate main gas supply. Drain cool water from pan.
Remove control knob from user thermostat and undo
fixings at either end of control panel. Pull panel
forward, while easing bottom edge up slightly.
Undo fixings alongside user thermostat spindle and
withdraw thermostat. Follow thermostat phial lead to
boss in pan front wall and undo small compression
nut which seals lead in position. Remove boss nut
and withdraw thermostat phial. Disconnect
thermostat electrical connections prior to removal of
thermostat. Replace in reverse order.
Push in and turn MFC control knob to OFF position.
Remove MFC as detailed in Section 2.8.1.
Undo fixings from control base and remove bottom
cover. Remove diaphragm, spring and valve
assembly by carefully lifting the edge all round. Clean
valve face with a fresh, soft, lint-free cloth or chamois.
Replace the diaphragm ensuring that diaphragm ear
engages with casting cut-out. Reposition bottom
cover and ensure spring locates on the rubber
projection at diaphragm centre. It should engage in
the centre depression of lower cover. Replace fixings
and tighten securely. Turn on gas supply and with
main burner on, check around bottom cover for leaks
with a soap solution.
3.8.3 To Lubricate the Gas Cock Plug
Isolate gas supply.
Turn control knob to ON position.
Remove fixings at actuator corners and remove
actuator and gasket.
3.7.2 Recalibration of User Thermostat
Remove knob from thermostat spindle taking care not Remove fixings through top cover.
to rotate it in either direction. This would change Carefully separate top cover assembly from control
setting. Steady spindle and rotate calibration screw body. Take care not to damage body gasket when
clockwise to decrease and anti-clockwise to increase removing gasket and cock spring.
the temperature. The approx. effect of a quarter turn Note key way position in plug top before removal of
is 27oC. Replace control knob and allow unit to the cock from body. It may be necessary to rotate this
operate until temperature has stabilised before slightly during removal. Remove old grease from plug
making final check.
only, do not attempt to clean cavity as old grease or
3.7.3 Checking the User Thermostat Calibration foreign matter may have been pushed into the cavity.
Using a reliable thermometer immersed 25mm below Lubricate cock plug only with good quality grease
water surface at pan centre. Measure water which is suitable for use with aluminium gas cocks.
temperature when a steady condition has been DO NOT OVER LUBRICATE.
Replace gas cock, rotating until keyway is in same
established.
position as it was upon removal.
3.7.4 Removal of Safety Thermostat
Isolate gas supply and drain water from pan. Reposition body gasket and spring. Ensure gasket
Undo fixings which secure safety stat to bracket. holes locate over raised boss around the fixing holes.
Undo fixing which retains thermocouple capillary to Replace control body top cover assembly. Ensure
pan base and remove packing. Withdraw phial and cock spring enters hub of dial shaft and that rubber
undo wires from interrupter. Fit replacement stat safety pilot valve face clears body casting edge.
Bear down on top cover when tightening fixings.
bracket and reposition parts in reverse order.
Reposition gasket and actuator. Position actuator so
that indicator mark is near knob. Securely tighten
corner fixings.