11
72
HEAT EXCHANGER REPLACEMENT
73
EXPANSION VESSEL RECHARGING AND REPLACEMENT
1. Refer to Frames 45 & 46.
2. Refer to Frame 53.
3. Close the isolating service valves and drain the (CH) boiler. Refer to
Frame 65.
4. Remove the Burner & Fan assembly. Refer to Frame 52.
5. Remove the securing clips to disconnect the ow and return pipes
below the heat exchanger.
6. Disconnect the condensate pipe from the sump
7. Disconnect the DRYFIRE ONE TIME sensor lead.
8. Remove the horseshoe bracket and lift up the ue turret.
9. Remove the securing screws and disconnect the ue outlet
10. Remove the 4 screws securing the heat exchanger xing brackets.
11. Remove the heat exchanger forwards, lifting to clear the ow and
return pipes
12. Ret in reverse order. Ensure all wires and harnesses are in their
correct position in order to prevent damage to them.
13. Open the isolating valves and rell the CH system. Refer to Frame 65.
14. Check the operation of the boiler. Refer to Frames 32-35.
Recharging:
1. Refer to Frames 45 & 46
2. Refer to Frame 53.
3. Remove the charge point cover.
4. Recharge the tank pressure to 0.75bar
5. Ret in reverse order
6. Check the operat ion of the boiler. Refer to Frames 32-35.
Replacement:
7. Refer to Frame 45 & 46.
8. Refer to Frame 53.
9. Close the isolating service valves and drain the (CH) boiler
10. Remove the clip securing the exible connecting hose and
disconnect.
11. Remove the two securing screws from the top of the
casing at the same time holding the ignitor bracket to
prevent movement.
12. Hold the expansion vessel and move the ignition assembly
bracket carefully to one side.
13. Pull the bottom of the expansion vessel forward, when free
pull vessel downwards and remove.
14. Ret in reverse order.
15. Open the isolating valves and rell the CH system
16. Check the operation of the boiler. Refer to Frames 32-35.
5
10
7
10
6
3
9
SERVICING