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Subject to change without notice | 83057000jUK – Translation of the original operating manual | ait-deutschland GmbH
7.4
Flush and fill the heating and
domestic hot water charging
circuit
Heating water quality
NOTE
●
For detailed information refer, among
other things, to the VDI Guidelines
2035 “Vermeidung von Schäden in
Warmwasserheizanlagen”
●
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 the required water quality is not achieved, con-
sult a company specialising in the treatment of he-
ating water.
►
Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).
Drain pipe of the safety valve is connected.
The front panel of the module box is unscrewed.
►
Ensure that the set pressure of the safety valve is
not exceeded.
1. Pull the U-clip
(②)
off the floor of the valve mo
-
tor
(①)
.
2.
Pull the valve motor carefully upwards and off the
3-way changeover valve
(③)
.
3. Turn the spindle of the 3-way changeover valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way changeover 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 changeover valve.
6. Flush heating circuit thoroughly, until no more air
is discharged.
7. Position the valve motor
(①)
on the 3-way change-
over valve
(③)
.
