Vaillant 0010015674, Installation And Maintenance Instructions Manual

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0020238195_07 ecoTEC plus Installation and maintenance instructions
35
13.5 Preparing the repair work
1. Decommission the product.
2. Disconnect the product from the electrical installation.
3. Remove the front casing.
4. Close the gas stopcock.
5. Close the service valves in the heating flow and in the
heating return.
6. Close the service valve in the cold water pipe.
7. Drain the product if you want to replace water-carrying
components of the product.
8. Ensure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals and O-rings. Do not use any addi-
tional components.
13.5.1 Procuring spare parts
The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
13.6 Replacing defective components
13.6.1 Replacing the burner
1. Remove the gas-air mixture unit. (
→
Page 32)
2. Remove the burner seal.
3. Remove the burner .
4. Install the new burner complete with new burner seal on
the heat exchanger.
5. Install the gas-air mixture unit. (
→
Page 34)
13.6.2 Replacing the gas-air mixture unit
1. Remove the gas-air mixture unit. (
→
Page 32)
2. Install the new gas-air mixture (
→
Page 34).
13.6.3 Replacing the heat exchanger
1. Remove the side section. (
→
Page 16)
2. Remove the gas-air mixture unit. (
→
Page 32)
E
1
2
D
B
C
A
3. Remove the flow pipe (1) .
4. Remove the return pipe (2) .
B
A
5. Remove the gas pipe .
B
3
4
A
6. Undo the clip underneath the condensate tray (4) .
7. Undo the two screws (3) .