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Subject to change without notice | 83059200dUK – Translation of the original operating manual | ait-deutschland GmbH
8
Flushing, filling and venting
the system
8.1 Heating water quality
NOTE
●
Detailed information is also provided in VDI
Guideline 2035 “Vermeidung von Schäden
in Warmwasserheizanlagen” (Avoiding
damage to hot water heating systems)
●
Required pH value: 8.2 … 10
●
For aluminium materials:
pH value: 8.2 … 8.5
►
Fill the system with deionised heating water
(VE water) or with water corresponding to VDI
2035 only (low-salt operation of the system).
Advantages of low-salt operation:
●
Low corrosion-promoting properties
●
No formation of mineral scale
●
Ideal for closed heating circuits
● Ideal pH value due to self-alkalisation after filling
the system
●
If necessary, simple alkalisation to pH value 8.2
by adding chemicals
8.2
Flush and fill the heating and
domestic hot water charging
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 changeover valve through the venting
programme. As a result it is not necessary to
remove the valve motor.
1. Pull the U-clip
(2) of the switching valve
(accessory) off the base of the valve motor (1).
2.
Pull the valve motor carefully off the 3-way
switching valve (3).
3. 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
4. Flush the domestic hot water charging circuit for
approx. 1 minute.
5. 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.
6. Flush heating circuit thoroughly, until no more air
is discharged.
7. Position the valve motor (1) on the 3-way switching
valve (3).
8. Insert the U-clip (2) into the base of the valve
motor.
