3 Product description
10
993x053x-mub-en – V05
2020/03
3.2.2
Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining
the HeatBloC
®
.
Isolation of the pump
1.
Close the ball valves in the flow and the return (A-2, F-2).
2.
Remove the actuator from the mixing valve.
3.
Turn the rotary knob of the mixing valve such that the black nose is directed to "VL zu"
(flow closed). The mixing valve is now closed and drop tight if the installation is
unpressurised.
3.2.3
Check valve
The HeatBloC
®
is equipped with a check valve (D-1) in the return pipe.
The check valve can be opened.
Operation
During operation, the marking 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 installation, the marking
must be directed to "A".
The check valve is open.
Flow in both directions.
