Checking The Plate Heat Exchanger - Viessmann B2TF Installation And Service Instructions Manual

Repairs
(cont.)

Checking the plate heat exchanger

Fig. 53
1. Drain the boiler:
On the heating water side, see page 97
■
On the DHW side, see page 50
■
2. Move the programming unit to the maintenance
position (see page 30).
3. Undo the fixing screws.
4. Detach the plate heat exchanger and remove
towards the front.
8. 3.
4.
5. Check the connections on the heating water and
6. Install in reverse order using new gaskets.
DHW sides for contamination and scaling; replace
the plate heat exchanger if necessary.
Torque for fixing screws 3.2 Nm
Troubleshooting
101