Checking The Plate Heat Exchanger - Viessmann Vitodens 200-W B2HE Installation And Service Instructions Manual

Repairs
(cont.)

Checking the plate heat exchanger

A
D
8. 2.
Fig. 55
Heating water flow
A
Heating water return
B
1. Shut off and drain the boiler on the heating water
and DHW sides.
2. Undo screws.
3. Remove plate heat exchanger.
Note
During and after removal, small amounts of water
may trickle from the plate heat exchanger.
4. Remove gaskets and dispose of them.
5. Check connections on the DHW side for scaling.
Clean or replace the plate heat exchanger as
required.
6. Check connections on the heating water side for
contamination. Clean or replace the plate heat
exchanger as required.
B
C
8. 4.
Cold water
C
DHW
D
7. Install plate heat exchanger in reverse order using
new gaskets.
Screw torque: 3.2 Nm
Note
During installation, ensure the connections are
positioned and the gaskets seated correctly.
3.
0.2
±
Danger
Risk of electric shock from escaping heating
water or DHW.
Check all water side connections for tight-
ness.
Troubleshooting
103