PAW HeatBloC K34 DN 25, Инструкция по установке и эксплуатации

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3 Product description
8 993x063x-mub-en – V01 2017/01
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 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.
Filling, draining, venting 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.