Table of Contents
Advertisement
3.2.2 Pump [specialist]
The pump can be completely isolated. It can be replaced and maintained without draining the heating
installation.
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 actuator 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 can be added to the flow. This can result in an increase of the flow rate of the heating
circuit. An open bypass leads to a decrease of the flow temperature!
Mixing valve with flow on the right:
8
Position 10: passage, no mixing
flow temperature consumer = flow
temperature heat generator (only if
bypass is closed!)
Position 0:
100% mixing
flow temperature consumer = return
temperature consumer
993x063x-mub-en - V04
3
Product description
02/2023
Advertisement
Table of Contents
