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12. Install the new heat exchanger in reverse order.
13. With the new heat exchanger, ensure that you use the
cable with a coding resistor and the correct plug.
Caution.
Risk of poisoning due to escaping flue
gas.
Mineral-oil-based greases can damage the
seals.
▶
Instead of grease, use only water or com-
mercially available soft soap to aid install-
ation.
14. Replace the seals.
15. Insert the flow and return connections into the heat
exchanger as far as they will go.
16. Make sure that the clips are seated correctly on the
flow and return connections.
17. Install the compact thermal module. (→ Page 34)
18. Fill and purge the product and, if necessary, the heating
installation.
10.10.6 Replacing the expansion vessel
1
2
3
1.
Empty the product.
2.
Detach the connection (3).
3.
Undo the strap handle (2).
4.
Pull the expansion vessel (1)out towards the front.
5.
Insert the new expansion vessel into the product.
6.
Screw the new expansion vessel to the water connec-
tion. Use a new seal for this.
7.
Attach the support plate using both screws (1).
8.
If necessary, adjust the pressure to the static height of
the heating installation.
9.
Fill and purge the product and, if necessary, the heating
installation.
0020181421_04 ecoCOMPACT Installation and maintenance instructions
10.10.7 Replacing the PCB and/or the display
Caution.
Risk of material damage caused by incor-
rect repairs.
Using an incorrect replacement display may
cause damage to the electronics.
▶
Before replacing, check that the correct
replacement display is available.
▶
Never use another replacement display.
Note
If you are replacing only one component, the set
parameters are transferred automatically. When
the product is switched on, the new component
adopts the previously set parameters from the
unreplaced component.
1.
Disconnect the unit from the power mains and secure it
against being switched back on again.
Conditions: Replacing the display or PCB
▶
Replace the PCB or display according to the assembly
and installation instructions supplied.
▶
If you are replacing the PCB, remove the coding resist-
ance (1) (plug X24) from the old PCB and plug the plug
onto the new PCB.
Conditions: Replacing the PCB and display at the same time
▶
Remove the coding resistance (1) (plug X24) from the
old PCB and plug the plug into the new PCB.
▶
If you are replacing both components at the same time,
the product switches directly to the menu to select the
language after switching on. The default language set-
ting is English.
▶
Select the required language.
▶
Confirm the setting by pressing (OK).
▶
Set the Device Specific Number D.093.
▶
Confirm your setting.
◁
The electronics are now set to the product type and
the parameters of all diagnostics codes are set to
default settings.
◁
The display automatically restarts with the installation
assistant.
▶
Make the system-specific settings.
Troubleshooting 10
1
41
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