47
SERVICING
isar + programmer -
Installation and Servicing
70 SAFETY RELIEF VALVE REPLACEMENT
1.
Refer to Frame 52.
2.
Remove the casing front and bottom panels. Refer to
Frames 44 & 45.
3.
Drain the boiler. Refer to Frame 72.
4.
Remove the discharge pipe.
5.
Remove the 4 screws retaining the rear support plate and
withdraw the plate.
Note.
The M4 screws fit the casing and the self -tapping screws
fit the plastic pump and valve housings, as shown.
6.
Withdraw the securing pin.
71 AUTOMATIC AIR VENT REPLACEMENT
1.
Refer to Frame 52
2.
Remove the boiler front and sealing panels. Refer to
frames 44 and 45.
3.
Drain the boiler. Refer to frame 72.
4.
Remove the turret from the boiler. Refer to frame 26.
5.
Release the silicon tubing from the sample point.
6.
Release the electrical connections from the dry fire
thermistor.
7.
Release the electrical connections from the spark
generator.
8.
Remove the M5 nut retaining the flue casting spring clip
and remove the spring clip.
9.
Undo the 2 M5 x 10 flue spring clip retaining bracket
screws and remove the bracket.
10.
Remove the M5 x 10 screw retaining the flue casting.
11.
Remove the flue casting.
12.
Remove the screw and rear bracket. Pull the air vent and
plug assembly from the heat exchanger and replace with
the parts supplied in the air vent kit.
13.
Re assemble the boiler in reverse order.
14.
Refill the boiler. Refer to frame 31. Check for leaks around
the new air vent joint.
15.
Check the operation of the boiler. Refer to frame 52.
7.
Remove the safety valve.
8.
Fit the new safety valve and refit the securing pin.
9.
Reassemble in reverse order, ensuring correct
location of screws in the support plate and that tabs
on the pump and valve housings engage in slots.
10.
Reconnect the discharge pipe.
11.
Refill the boiler. Refer to Frame 31.
12.
Check operation of the boiler. Refer to Frame 52.
Support plate
M4 screw
2012
M4 screw
Self tapper
screw
Discharge pipe
Safety relief valve
Securing pin
2039
nm8
0
28
10
9
8
6
Air vent
Plug
SER
VICING
202851-1new.pmd
17/11/2006, 07:41
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