IDEAL icos system HE15 Installation And Servicing page 49

back
71 SAFETY RELIEF VALVE REPLACEMENT
1. Refer to Frame 55.
2. Remove the boiler front and bottom panels. Refer to
Frame 47 & 48.
3. Drain the boiler. Refer to Frame 73.
4. Remove the discharge pipe.
5. Unscrew the 4 screws securing 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 housing as
shown .
M4 screw
Support plate
72 AUTOMATIC AIR VENT REPLACEMENT
1. Refer to Frame 57.
2. Remove the boiler front and sealing panels.
Refer to frames 49 and 50.
3. Drain the boiler. Refer to frame 77.
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 x 10 screw retaining the top
flue manifold casting.
9. Remove the casting.
10. Remove the fan from the boiler. Refer to
Frame 57.
11. Remove the burner from the heat exchanger.
Refer to Frame 59.
12. Unscrew the air vent from its heat exchanger
mount and replace.
13. Re assemble the boiler in reverse order.
14. Refill the boiler. Refer to frame 35. Check for leaks around the new air vent joint.
15. Check the operation of the boiler. Refer to frame 57.
icos system -
Installation and Servicing
Self tapper
screws
Discharge pipe
SERVICING
6. Withdraw the securing pin.
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 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 35.
12. Check operation of the boiler. Refer to Frame 55.
M4 screw
Securing pin
Safety relief valve
49