Outdoor Unit, Indoor Unit And Heating System; Filling - Bosch AWE Installation Manual

Installation
5.4.2 Outdoor unit, indoor unit and heating system filling
NOTICE
The system will be damaged if it is turned on without water.
The system may be damaged if it is turned on without water.
▶ Fill the DHW cylinder and heating system before turning on the
heating system, and establish the correct pressure.
VC3
Fig. 7 Indoor unit and heating system
[Z1] Heating system (without mixing valve)
[1] Heat pump
[2] Manual purge valve
1. Disconnect the power supply to the heat pump and indoor unit.
2. Close the heating system valves; particle filter SC1 and VC3.
3. Connect a hose to VA0 and route the other end to a drain. Open the
drain valve VA0.
4. Open the fill valve VW2 and admit water into the pipes leading to the
heat pump.
5. Open the manual air vent until water flows without air and close the
vent again.
6. Continue filling until only water comes out of the hose by the drain
and the outdoor unit's condenser does not form bubbles any more.
7. Close the drain valve VA0 and the fill valve VW2.
8. Move the hose to the heating system drain valve VC2.
10
T
PC1
VC1
T
2
VL1
GC1
PC0
SC1
VA0
VW2
Vent also at other ventilation punts in the heating system, e.g. radiators.
Fill preferably to a higher pressure than the final one so that there is a
margin when the temperature of the heating system rises and the air that
has been dissolved in the water is vented out via VL1.
VC2
1
9. Open the valve VC3, the drain valve VC2 and the fill valve VW2 to fill
the heating system.
10.Continue filling until only water comes out of the hose by the drain
and the heating system does not form bubbles.
11.Close the drain valve VC2.
12.Open the particle filter SC1 and keep filling until the pressure gauge
GC1 shows 2 bar.
13.Close the fill valve VW2.
14.Remove the hose from VC2.
Z1
AWE – 6721835317 (2021/09)