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3.2.1 Check valve and non-return valve
The HeatBloC® is equipped with a check valve (D-1, opening pressure 200 mm wc) in the
return pipe and with a non-return valve (C-3, opening pressure 50 mm wc) in the return of the
mixing valve. The valves can be opened.
Operation
Filling, draining, venting
10
During operation, the markings must point to "Z".
The check valve and the non-return valve are closed.
Flow only in the direction of the arrow.
For filling, draining and venting, the markings must be directed
to "A".
The check valve and the non-return valve are open.
Flow in both directions.
993x0663Mx-mub-en – V01
3 Product description
2021/07
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