16
Subject to change without notice | 83031300dUK | ait-deutschland GmbH
16
Flushing, filling and venting
16.1 Heating water quality
NOTE
●
For detailed information refer, among
other things, to the VDI Guidelines
2035 “Vermeidung von Schäden in
Warmwasserheizanlagen” (preventing
damage in 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 the VDI
2035 norm 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
heating water.
►
Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).
16.2
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.
1. Vent system at the respective highest point.
2. Additionally open the vent valve at the condenser
of the heat pump.
2.1. Open the lower facing panel:
●
For standard unit on the evaporator side.
●
On the fan side for unit variant L.
2.2. Open vent valve
1 Condensate pan
2 Vent valve
3 Upper edge of plate heat exchanger
3. Vent the condenser.
4. After venting, close the lower facing panel.
17 Insulate hydraulic connections
Insulate hydraulic lines in accordance with local regu-
lations.
1.
Open shut-off devices.
2. Perform a pressure test and check for leaks.
3. Insulate external piping on site.
4.
Insulate all connections, fittings and pipes.
