46
SERVICING
excel HE -
Installation and Servicing
75 PUMP HEAD REPLACEMENT
74 DHW PLATE HEAT EXCHANGER REPLACEMENT
1.
Refer to Frame 51.
2.
Remove the boiler front, side and sealing
panels. Refer to Frame 44 and 45. Put the
control box into the servicing position. Refer
to Frame 46.
3.
Drain the boiler water circuits. Refer to
Frame 67.
4.
Pull out the two "U" shaped clips retaining
the copper bypass pipe and remove the
pipe.
5.
Unscrew the two allen screws retaining the
DHW plate heat exchanger and remove the
heat exchanger via the space vacated by the
bypass pipe.
6.
Fit the new plate heat exchanger being
careful not to damage the 'O' rings and
retain with the two allen screws.
7.
Refit the bypass pipe and retain with two "U"
shaped clips.
8.
Re-assemble in reverse order.
9.
Refill the boiler. Refer to Frame 32.
10.
Check the operation of the boiler. Refer to
Frame 50 and 51.
1.
Refer to Frame 51.
2.
Remove the boiler front, side and sealing
panels. Refer to Frame 44 and 45. Put the
control box into the servicing position. Refer to
Frame 46.
3.
Drain the boiler water circuits. Refer to Frame
67.
4.
Remove the pump electrical connection.
5.
Remove the four allen screws retaining the
pump head.
6.
Remove the pump head.
7.
Fit the new pump head.
8.
Re-assemble in reverse order.
9.
Refill the boiler. Refer to Frame 32.
10.
Check the operation of the boiler. Refer to
Frame 50 and 51.
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