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

Troubleshooting
Repairs
(cont.)

Checking the plate heat exchanger

B C D
Fig. 53
Heating water return
F
Heating water flow
G
1. Shut off and drain the boiler on the heating water
and DHW sides.
2. Disconnect the leads from temperature sensor
3. Remove thermal insulation
exchanger.
4. Undo screw and remove plate heat exchanger
C
D .
Note
During and after removal, small amounts of water
may trickle from the plate heat exchanger.
5. Remove gaskets and dispose of them.
E
114
F
K
E
A
A
from the plate heat
B
G
H
DHW
H
Cold water
K
6. Check connections on the DHW side for scaling. If
necessary, clean or replace the plate heat
exchanger.
.
7. Check connections on the heating water side for
soiling. If necessary, clean or replace the plate
heat exchanger.
8. Install the plate heat exchanger in reverse order
using new gaskets
Torque for screw
Note
During installation, ensure the connections are
positioned and the gaskets seated correctly.
.
E
0.5
C 4.5 Nm ±