2 Product description and functions
2012/02
9932053WI21NA – V02
7
2.1
2.1
2.1
2.1
Flow check valve [Specialist]
Flow check valve [Specialist]
Flow check valve [Specialist]
Flow check valve [Specialist]
The zone module is equipped with an openable flow check valve (D-1) that is integrated in the return pipe.
Operation
Operation
Operation
Operation
During operation, the marking must point to "Z".
The flow check valve is closed.
Flow only in the direction of the arrow.
Filling
Filling
Filling
Filling, , , , draining, ventilating
draining, ventilating
draining, ventilating
draining, ventilating
For filling, draining and ventilating, the marking must point to "A".
The flow check valve is opened.
Flow in both directions.
