Viessmann VITOPEND 200 Installation And Service Instructions Manual page 89

Repairs
(cont.)
3. Pull the leads off comfort
sensor B.
4. Remove thermal insulation E.
5. Release screws D and pull plate‐
type heat exchanger C forward.
6. Check the secondary side for scal-
ing and, if necessary, replace the
plate‐type heat exchanger.
Checking the outside temperature sensor (weather‐compen-
sated control unit)
7. Check the primary connections for
contamination and, if necessary,
flush via central heating return G
(flushing system for plate‐type heat
exchanger, see pricelist).
8. Lubricate the new gaskets/seals.
Install in reverse order with new
gaskets.
Troubleshooting
89