Alpha-InnoTec LW 161H-A, Operating Manual

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Subject to change without notice | 83061500bUK | ait-deutschland GmbH
3. Lay the BUS cable in a cable conduit up to the ca-
ble entry into the building and from there contin-
ue laying it up to the heating and heat pump con-
troller.
4. Connect the bus cable (communication) to the
wall-mounted controller using the plug included
with the heat pump.
4.1. Insert the contact spring ( ① ) into pin 3 of the bus
plug ( ② ) up to the limit stop.
The lugs on the broad end of the contact spring
must point upwards (in the direction of the num-
bers on the bus plug).
NOTE
If the contact spring is in the way when sub-
sequently inserting the wires of the bus ca-
ble, it can be disconnected and re-connected
after inserting the wires.
4.2. Strip the bus cable 30 mm.
30 mm
4.3. Push the shielding braid back 10 mm over the
sheath.
22.2 Heat pump side connection of the
BUS cable
The connection between the heat pump and the
heating and heat pump controller is made via a
BUS cable (to be provided by the customer on site,
recommended cable type I(Y) STY 2x2, ø each ≥
0,6 mm²).
Maximum line length: 30 m
NOTE
When laying the cable inside the building,
note that unshielded power supply cables
(voltage supply of outdoor unit) and shielded
cables (Mod-bus) must be laid separately
from each other (> 100 mm).
1. Like the power cable, the bus cable is passed
through the opening in the baseplate, through the
cable duct and into the switch area.
1 Cable duct
2. Connect the bus cable to the X20 circuit board.
1 Terminals for BUS cable