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8.2 Flush, fill and vent the heating
circuit
Outlet pipe of the safety valve is connected.
► Ensure that the set pressure of the safety valve is
not exceeded.
NOTE
The venting program on the controller can
also be used to support the flushing and
venting process. It is possible to control
individual recirculating pumps and even the
switching valve through the venting program.
The valve motor then does not have to be
removed.
1.
Vent system at the respective highest point.
2.
Pull off the U-clip (①) on the back of the valve mo-
tor (②) on the switching valve (③, integrated in hy-
draulic station HSV 4, accessories for module for
hydraulics HV 4 or wall-mounted controller) up-
wards.
1
Carefully pull the valve motor (②) forward off the
3.
3-way switching valve (③).
2
18
2
3
3
Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
4.
Turn the spindle of the 3-way switching valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way switching valve.
A
B
5.
Flush the domestic hot water charging circuit for
approx. 1 minute.
6.
Turn the spindle so that the rounded side of the
spindle points in the direction of marking B of the
connections of the 3-way switching valve.
7.
Flush heating circuit thoroughly, until no more air
is discharged.
Position the valve motor (②) on the 3-way switch-
8.
ing valve (③).
2
9.
Insert the U-clip (①) on the back of the valve mo-
tor (②).
1
3
2
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