Troubleshooting 13
0020300875_01 Energy
7
Installation and maintenance instructions
41
2
2
3
B
1
A
8.
Remove the upper clip
(1)
.
9.
Remove the lower clip
(3)
.
10. Remove the return pipe
(2)
.
1
A
2
11. Remove the clip underneath the condensate tray
(1)
.
12. Undo the four screws
(2)
.
2
1
B
C
A
13. Remove the ignition electrode
(1)
.
14. Lift the heat exchanger up slightly and remove it to-
gether with the condensate tray.
15. Remove the ignition transformer
(2)
.
16. Install the new heat exchanger in reverse order.
13.6.4 Replacing the pump head
1
2
1.
Disconnect the pump cables from the electronics box.
2.
Undo the four screws
(1)
.
3.
Remove the pump head
(2)
.
4.
Replace the O-ring.
5.
Use four screws to secure the new pump head.
6.
Connect the pump cables to the electronics box.
13.6.5 Replacing the expansion vessel
B
C
1
2
3
A
D
1.
Undo the nut
(3)
.
2.
Remove both screws on the support plate
(1)
.
3.
Remove the support plate .
4.
Pull out the expansion vessel
(2)
towards the front.
5.
Insert the new expansion vessel into the product.
6.
Screw the new expansion vessel to the water connec-
tion. To do this, use a new seal.
7.
Attach the support plate using both screws.
8.
Fill and purge the product (
Page 31) and, if required,
the heating installation.