12
Subject to technical amendments without notice | 83059700iUK – Translation of the original operating manual | ait-deutschland GmbH
Pull in the cables and conductors and create
the connections
1. Strip the sheathing of all cables to the external loads
before laying in the cable gland of the switch box.
2. Open electrical switch box.
3. Feed the control/sensor cables and unit supply
cable into the housing.
4. Connect cables to the respective terminals (
“Terminal diagrams", from page 31).
1 Feed-through glands
2 Soft starter
3 Cable glands
4 3 motor protection switches
5 Bus distributor
6 Connection terminal
7 Main board
8 Control cabinet fan
1. Lay the power cable in a cable conduit up to
the cable entry into the building and from there
continue to lay it up to the fuse box.
2. Connect the power cable to the power supply.
1 Cable gland for mains connection and BUS
lines
3. Seal empty pipes on the unit side.
4. Screw the facing panels onto the heat pump.
8
Flushing, filling and venting
8.1 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 only with demineralised heating
water (VE water) or VDI 2035 water (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 necessary, simple alkalisation to pH value 8.2
by adding chemicals
8.2
Flushing, filling and venting
the heating circuit
Outlet pipe of the safety valve is connected.
►
Ensure that the set pressure of the safety valve is
not exceeded.
NOTE
The venting programme on the controller
can also be used to support the flushing
and venting process. It is possible to control
individual recirculating pumps and also the
switchover valve via the venting programme.
1. Vent system at the respective highest point.
