Replacing components
78
Installation and maintenance instructions ecoTEC plus 0020134833_01
14
>
Remove the gas connecting pipe (
1, ¬ fig. 14.10
) from the
Venturi (
2 ¬ fig. 14.10
) by detaching the clamp (
3,
¬ fig. 14.10
) and pulling out the gas connecting pipe ver-
tically. Dispose of the seal (
6, ¬ fig. 14.10
).
>
Pull off the gas restrictor (
5, ¬ fig. 14.10
) in a straight
direction, and dispose of it.
>
Check whether the Venturi is free of residue at the gas
inlet side.
a
Danger!
Risk of poisoning due to increased CO
levels!
Using the wrong gas restrictor size can
cause higher CO levels.
>
When replacing the Venturi, ensure that
you use the correct gas restrictor (colour
coding and position of pins on the under-
side of the gas restrictor).
>
Insert the gas restrictor for the gas group in question
into the new Venturi(yellow: H gas, grey: liquid gas).
Ensure that the colour of the gas restrictor corresponds
with the colour of the coding resistor on the PCB in the
electronics box.
When inserting the gas restrictor, ensure that the gas
restrictor is correctly aligned using the specified position
marks on the top of the Venturi and also the positioning
pins (
4
) on the underside of the gas restrictor.
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 reverse order. Use new seals for
this.
>
After installing the new Venturi, perform a gas family
check (
¬ section 12.1.5
) and a gas ratio setting (
¬ sec-
tion 10.12
).
14.6
Replacing the expansion vessel
>
Drain the boiler (
¬ section 12.2.2
).
1
2
3
4
14.11 Replacing the expansion vessel
>
Loosen the screwed connection (
4
) at the water connec-
tion on the underside of the expansion vessel.
>
Remove both bolts (
1
) on the support plate (
2
).
>
Remove the support plate (
2
).
>
Pull out the expansion vessel (
3
) towards 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 bolts (
¬ fig. 14.13, pos. 1
).
>
Drain the boiler (
¬ section 12.2.2
).
>
Remove the compact thermal module (
¬ section 12.4.1
).
>
Detach the condensate discharge hose from the heat
exchanger.
Содержание ecoTEC plus VUI
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