Replacing components
76
Installation and maintenance instructions ecoTEC plus 0020116700_01
14
b
Caution.
Risk of damage to boiler and possible
malfunctions.
The use of lubricant can block function-
related channels in the venturi.
>
Never use lubricant when installing the
gas restrictor.
>
Refit the components in the reverse order. Use new
seals.
>
After installing the new venturi, perform a gas family
check (
¬ section 12.1.5
) and a gas ratio setting
(
¬ section 10.11
).
14.6
Replacing the expansion vessel
>
Drain the boiler (
¬ section 12.2.2
).
1
2
3
4
14.11 Replacing the expansion vessel
>
Slacken the screw connection (
4
) at the water connec-
tion on the underside of the expansion vessel.
>
Remove both screws (
1
) on the support plate (
2
).
>
Remove the support plate (
2
).
>
Pull out the expansion vessel (
3
) from the front.
>
Insert the new expansion vessel into the boiler.
>
Screw the new expansion vessel to the water connection.
Use a new seal for this.
>
Attach the support plate using both screws (
1
).
>
If necessary, adjust the pressure to the static height of
the heating installation (
¬ section 12.4.7
).
>
Fill and purge the boiler and the system, if necessary,
after installing the new expansion vessel (
¬ section 10.7
).
>
On completion of the work, check for water leaks.
14.7
Replacing the heat exchanger
b
Caution.
Risk of damage to the heat exchanger.
>
You can neither loosen nor tighten the
four screws (
¬ fig. 14.13, pos. 1
).
>
Drain the boiler (
¬ section 12.2.2
).
>
Remove the compact thermal module (
¬ section 12.4.1
).
>
Detach the condensate drain hose from the heat
exchanger.
1
2
3
14.12
Replacing the heat exchanger
>
Detach the clamps (
2, ¬ fig. 14.12
) and (
3, ¬ fig. 14.12
)
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. 14.12
) from each of the two
brackets of the heat exchanger.
Содержание ecoTEC plus SERIES
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