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3 Product description
3.2.2 Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining the
heating circuit system.
Isolation of the pump:
1. Disconnect the expansion tank from the installation.
2. Close the ball valves in the flow and the return (A-2, F-2).
3. Remove the controller PWR6 from the mixing valve.
4. Turn the bypass screw of the mixing valve such that the slot is in a vertical position.
5. Turn the nose of the valve cock such that the flow to the pump is closed (for flow on the
right: nose points downward, for flow on the left: nose points to the right; see below).
The mixing valve is now closed and drop tight.
3.2.3 3-way mixing valve [specialist]
The 3-way mixing valve (C), driven by an electric actuator, adjusts the flow temperature of the
consumer circuit to the required value by means of the flow sensor and the controller.
The mixing valve is equipped with a bypass which must be operated separately. Via this
bypass, cold return water is added to the flow of the HeatBloC®. This can result in an increase
of the flow rate of the HeatBloC®.
Mixing valve with flow on the right:
0
Flow of the pump closed
2021/07
10
Position 10
and bypass
closed:
Position 0:
993x0663Mx-mub-en – V01
Passage, no mixing, flow
temperature consumer = flow
temperature boiler
100% mixing flow
temperature consumer =
return temperature consumer
11
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