Replacing components
66
Installation and maintenance instructions ecoTEC 0020173113_01
14
>
Fill and purge the boiler and, if necessary, the system
after installing the new expansion vessel (
¬ sec-
tion 10.5
).
>
On completion of the work, check for water leaks.
14.5
Replacing the heat exchanger
b
Caution.
Risk of damage to the heat exchanger.
>
You can neither loosen nor tighten the
four screws (
¬ fig. 14.7, pos. 1
).
>
Drain the boiler (
¬ section 12.2.2
).
>
Remove the compact thermal module (
¬ section 12.3.1
).
>
Detach the condensate discharge hose from the heat
exchanger.
1
2
3
14.6
Replacing the heat exchanger
>
Detach the clamps (
2, ¬ fig. 14.6
) and (
3, ¬ fig. 14.6
)
from the flow connection and the return connection.
>
Detach the flow connection from the heat exchanger.
>
Detach the return connection from the heat exchanger.
>
Remove two screws (
1, ¬ fig. 14.6
) from each of the two
brackets of the heat exchanger.
1
1
2
3
14.7
Heat exchanger brackets
>
Disconnect the plug connection (
2, ¬ fig. 14.7
) of the
thermal fuse in the heat exchanger.
>
Remove the bottom three screws (
3, ¬ fig. 14.7
) from
the rear part of the heat exchanger bracket.
>
Swivel the bracket around the top screw (
1, ¬ fig. 14.7
)
to one side.
>
Pull the heat exchanger downwards and to the right, and
remove it from the boiler.
b
Caution.
Risk of damage to the boiler.
Mineral oil-based lubricants may damage
the seals. The seals should therefore not be
lubricated.
>
Only use water or commercially available
soft soap, if necessary, to assist with
installation.
>
Install the new heat exchanger in the reverse order.
>
Replace the seals.
>
Insert the flow and return connections into the heat
exchanger as far as they will go.
i
Make sure that the brackets are seated correctly
on the flow and return connections.
>
Reinstall the compact thermal module.
(
¬ section 12.3.6
).
>
Fill and purge the boiler and, if necessary, the heating
installation (
¬ section 10.5
).
