Viessmann VITODENS 100-W Installation And Service Instructions Manual page 51

For contractors. wall mounted gas condensing boiler natural gas and lpg version

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Repairs

(cont.)

5. Remove two screws C from the

plate heat exchanger and remove

plate heat exchanger D with gas-

kets.

Note

During removal, small amounts of

water may trickle out and escape

from the plate heat exchanger.

6. Check the DHW side for scaling and

if required clean or replace the plate

heat exchanger.

Checking the fuse

1. Switch the power OFF.

2. Open control unit casing (see

page 14).

7. Check the heating water side for con-

tamination and if required clean or

replace the plate heat exchanger.

8. Install in reverse order with new gas-

kets.

Note

Ensure that fixing holes and gaskets

are aligned. Install the plate heat

exchanger with the correct orienta-

tion.

3. Check fuse F4.

Troubleshooting

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