Check Valve And Non-Return Valve - PAW HeatBloC K33 Assembly, Installation And Operation Instructions

3 Product description

3.2.2 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
2020/03
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.
9936073x-mub-en – V03 11