Removing The Hydraulic Unit - Viessmann B1HF Installation And Service Instructions Manual

Troubleshooting
Repairs
(cont.)
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.

Removing the hydraulic unit

If components of the hydraulic unit have to be
replaced.
Danger
Risk of electric shock from escaping heating
water or DHW.
After installation, check all connections on the
water side for leaks.
90
7. Install plate heat exchanger in reverse order using
new gaskets.
Tighten screws as tightly as necessary and ensure
that the components are undamaged and are func-
tioning correctly throughout service life.
Observe torque settings if a torque wrench is avail-
able.
Screw torque: 3.2 Nm
Note
During installation, ensure the connections are
positioned and the gaskets seated correctly.
Danger
Risk of electric shock from escaping heating
water or DHW.
Check all water side connections for tight-
ness.
0.2
±