Temperature And Pressure Relief Valve Replacement; Boiler Automatic Air Vent Replacement - IDEAL istor HE260 Installation And Servicing

83 TEMPERATURE & PRESSURE RELIEF VALVE REPLACEMENT
1. Refer to Frame 53 & 54.
2. Remove the DHW expansion
vessel. Refer to Frame 56.
3. Drain the cylinder. Refer to
Frame 86.
4. Remove the control box fixing
screws and slide the box to
enable the valve to be removed
through the cutout in the boiler
module base plate.
5. Remove the valve.
6. Fit the new relief valve.
7. Reassemble in reverse order.
8. Check operation of the boiler.
Refer to Frame 49.

84 BOILER AUTOMATIC AIR VENT REPLACEMENT

1. Refer to Frame 53 & 54.
2. Drain the boiler. Refer to frame 85.
3. Remove the turret from the boiler. Refer to frame
32.
4. Release the silicon tubing from the sample point.
5. Release the electrical connections from the dry fire
thermistor.
6. Release the electrical connections from the spark
generator.
7. Remove the M5 nut retaining the flue casting
spring clip and remove the spring clip.
8. Undo the 2 M5 x 10 flue spring clip retaining
bracket screws and remove the bracket.
9. Remove the M5 x 10 screw retaining the flue
casting.
10. Remove the flue casting.
11. If the boiler has an air vent spacer – unscrew the
air vent from it, and remove. Unscrew the air vent
from the heat exchanger plug as supplied in the
kit. Dispose of the heat exchanger plug, fit the new
air vent onto the spacer, complete with O ring
provided, and reassemble in reverse order.
12. Where an air vent spacer is not used, 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.
58
SERVICING
6
Fan
13. Refill the boiler. Refer to Frame 41. Check for leaks around
the new air vent joint.
14. Re assemble the boiler in reverse order.
15. Check the operation of the boiler. Refer to Frame 49.
istor system store -
ist9870
Air vent
Plug
ist9419
Installation and Servicing