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Subject to technical amendments without prior notice | 83070000cUK | ait-deutschland GmbH
7. Connect the communication cable (W2) to the
connection terminal AA23-X4-1 (A), AA23-X4-2
(B), AA23-X4-3 (GND).
Jersey …
8. Fix the communication cable (W2) at the open-
ings (
②
) in the board installation plate with 2 cable
ties (strain relief).
9. Lay the communication cable (W2) in the building
and route it to the electrical switch box of the hy-
draulic tower HT 7.
10. Connect the communication cable (W2) to the
connection terminal AA3-X4-15 (A), AA3-X4-14
(B), AA3-X4-13 (GND) in the hydraulic tower HT 7.
Jersey …
Hydraulic
tower HT 7
11. Connect the power cable of the heat pump to the
connection terminal in the hydraulik tower HT 7.
Terminal diagram in the hydraulic tower HT 7 op-
erating manual
12. Once the electrical connections have been made,
install façades on the heat pump and close the
electrical switch box of the hydraulic tower HT 7.
9 Flushing, filling and venting
9.1 Heating water quality
NOTE
●
For detailed information, see also 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
►
Only fill the system with demineralised heating
water or with VDI 2035 equivalent water (for low-
salt operation of the system).
Advantages of low-salt operation:
●
Minimal corrosion
●
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 that specialises in treatment of
heating water.
►
It is advisable to keep a system log for hot water
heating systems containing the relevant planning
& design data (VDI 2035).
Anti-freeze in the heating circuit
For air/water heat pumps installed outdoors, it is not
necessary to add a water-antifreeze mixture into the
heating circuit.
The heat pumps have safety devices which prevent
the water from freezing even when the heating is
switched off. The prerequisite is that the heat pump re-
mains switched on and is not disconnected from the
power supply. If there is a risk of frost, the circulation
pumps are activated.
