Primary Heat Exchanger - Potterton Performa 9 SL HE User Manual

Bolt
Nut
9.14 Drain point
Fig. 62
50
Screw
Flue duct securing
bracket
3 way casting shown

9.14 Primary Heat Exchanger

1. Perform General Access - See 9.2.
2. Drain the system as necessary.
3. Remove the combustion chamber cover -
See 9.9.
4. Drain the heat exchanger, a drain point is
located on the left hand side bottom of the
Screw
heat exchanger. Attach a tube to the drain
point, turn anti-clockwise to open and drain
water away from the electronics.
5. Remove the Casting Sensor - See 9.7.
6. Remove the Fan and Flue Hood - See 9.9.
7. Remove the Burner - See 9.10.
8. Remove the Combustion Chamber Insulation
- See 9.12.
To ease the removal of the primary heat
exchanger it may be necessary to:-
- Release the flow pipe compression fitting
above the boiler.
- Remove the clip securing the return pipe
from the secondary to the primary heat
exchanger.
9. Release the flow and return unions at the
heat exchanger and lift the pipes clear.
10.Remove the screw from the top right hand
side and bolt and nut from the left hand side
mounting brackets.
11.Support the heat exchanger, spring out the
left hand mounting bracket to clear the stud
and withdraw the heat exchanger.
12.Re-assemble in reverse order. Ensure all
seals are replaced as necessary.
- Ensure the return pipe is fully engaged
and re-insert the pipe clip to lock it in
position. Check the joint will not pull apart.
13.Check the inhibitor concentration when re-
commissioning the system.
14.Vent all air from boiler and system before
firing boiler.
© Baxi Heating UK Ltd 2008