Supplied By www.heating spares.co Tel. 0161 620 6677
32
221504A
Diagram 14.4
CONTROL THERMOSTAT
and OVERHEAT CUTOFF
OVERHEAT
CUTOFF
PHIAL
PHIAL
RETAINING
PIN
CONTROL
THERMOSTAT
PHIAL
GLAND PLATE
3330
Diagram 14.3
CONTROL THERMOSTAT/
OVERHEAT CUTOFF
14 Replacement of Parts
3329
CONTROL THERMOSTAT
ELECTRICAL CONNECTIONS (5)
BROWN 9 , RED 8
PURPLE 7 YELLOW 6 & 3
AIR PRESSURE
SWITCH PLUG
SPLIT
GROMMET
RETAINING
CLIP
OVERHEAT
CUTOFF
SECURING SCREW (2)
LOCK NUT
CONTROL
THERMOSTAT
KNOB
14.6 Control Thermostat - diagram 14.3
Pull off the control thermostat knob.
Remove the electrical connections from the thermostat body.
Disconnect the air pressure switch connector plug from the
PCB.
Remove the thermostat securing screws.
Release the capillary from the base and plastic retaining clip
then remove it from the split grommet.
14.7 Overheat Cutoff - diagram 14.3
Remove the electrical connections.
Disconnect the air pressure switch connect plug from the PCB.
Remove the locking nut from the overheat cutoff.
Release the capillary from the plastic retaining clip then remove
it from the split grommet.
14.8 Control Thermostat and Overheat Cutoff
Capillaries and Phials - diagram 14.4
Remove the cable ties retaining the capillary(s), see diagram
14.1.
Remove the gland plate.
Remove the split pin and withdraw the two phials from the heat
exchanger pocket.
Withdraw the capillary(s) through the boiler casing gland plate.
Note: On replacement the phials should be positioned as
illustrated and smeared with the heat sink compound supplied.
Neatly coil any surplus capillary.
14.9 Air Pressure Switch: Diagram 14.5
Remove the control box, refer to Section 9.
Disconnect the air pressure switch tubes.
Disconnect the electrical plug from the PCB, see diagram 14.3.
Remove the two securing screws to release the air pressure
switch and cable assembly.
Remove the cables and fit to the replacement air pressure
switch.
To Next Page
Loading...
