Alpha-InnoTec WZSV 42K3M, Operating Manual

Page: 19 / 40

19
Subject to technical amendments without prior notice | 83072100aUK | 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 switching valve (③) .
2
3
1
3. Turn the spindle ( ④ ) 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.
4
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.