3 Product description
8
9932013x-mub-en – V12
2020/04
3.2.1
Check valve
The HeatBloC
®
is equipped with a check valve (D-1) in the return pipe. The check valve can be
opened manually
Operation
During operation, the mark must be directed to "Z".
The check valve is closed.
Flow only in the direction of the arrow.
Filling, draining, venting
For filling, draining and venting, the mark must
be directed to "A".
The check valve is open.
Flow in both directions.
