Pressure Gauge
Drain the appliance. Lower the facia.
Twist the head of the pressure gauge anti-clockwise to release
from the side casing. Refer to Fig.24.
Unscrew the hexagon nut securing the pressure gauge sensor
and remove the gauge.
Refill, vent and re-pressurise. Prime the siphon.
Gas Valve
Lower the facia panel.
Remove the inner case cover.
Pull off the solenoid connections at the rear of the valve. Refer to
Fig.25.
Pull out the plastic air distributer from the top of the valve.
Undo the union connecting the pipe to the pre-mix tube and
seperate from the gas valve - it can be carefully pushed into the
pre-mix tube.
Carefully release the locknut at the gas valve outlet.
Unscrew the inlet union at the gas valve.
Remove the support bracket from beneath the gas valve by
unscrewing the two pozi-head screws.
Control Module
Remove the inner case cover. Unscrew the locking screw and lift
the rear of the module slightly to release and remove. Unplug the
connections. The fuse, T2.5A, can be accessed by unscrewing the
control module cover panel fixing screw.
To replace the control board and/or transformer remove the
cover panel. Release the four clips to remove the control board
and transformer. Refer to Fig.14.
Air Flow Switch
Remove the Control Module. Carefully pull off plastic tube to
unclip the switch. Carefully remove the assembly and remove
the connectors. Refer to Fig.14.
Spark Electrode
Remove the inner case cover. Pull off the leads to the electrodes.
Unscrew the two screws and remove the electrode. Fit a new
gasket when fitting the new electrode. Refer to Fig.26.
Flame Sense Electrode
Remove the inner case cover. Pull off the lead to the electrode.
Unscrew the two screws and remove the electrode. Fit a new
gasket when fitting the new electrode. Refer to Fig.26.
25
1
2
3
4
Fig. 23. Pressure gauge
Fig. 24. Pump, manual air vent, diverter valve.
Fig. 25. Gas valve.
Fig. 26. Spark and flame sense electrodes.
Pump
Diverter Valve
Pressure
Gauge
Head
Facia
Assembly
Side
Casing
Fixing Screw
Manual Air Vent
and Syphon Fill
Pump
Pump Cap
Pressure
Gauge
Connection
Drain Plug
Diverter
Valve
Bypass
Pipe
Seal
Fixing Screws
Support Bracket
Seal
Seal
Seal
Gas Valve
Solenoids
Inner
Case
Base
Throttle Disk
Gas
Valve
Air
Distributor
Head
Nut
O-Ring
Pre-mixing Tube
Spark
Electrode
Flame
Sense
Electrode
Sightglass
Relief Valve
(at rear)
Summary of Contents for Greenstar ZWBR 11-25 A31
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