69
Terminals Component Explanation
3 to 5
72.L
72.GND
72.H
Indoor/outdoor unit CAN bus communica-
tion cable connection
Connection for integration into the internal
CAN bus system
■
When wiring on site: Also connect shield-
ing to terminal 72.GND.
■
If the indoor unit is operated without the
outdoor unit (e.g. for screed drying), con-
nect the terminator into terminal 72 be-
tween 72.L and 72.H.
Recommended connecting cable:
■
Pre-assembled bus communication cable
(accessories)
For further information: See chapter "Con-
necting the CAN bus communication cable
of the indoor/outdoor unit".
6 to 8
91.L
91.H
Connection of an additional CAN bus sub-
scriber (Viessmann appliance),
e.g. Vitocharge VX3
To integrate the heat pump into an external
CAN bus system:
For recommended connecting cable and fur-
ther information: See chapter "Connecting
with other Viessmann appliances via the
CAN bus".
The connection is routed internally to
plug 91 in the HPMU electronics module.
Do not connect CAN Ground (GND)!
Note
Plug 72 of the indoor/outdoor unit CAN bus
communication cable may only be connec-
ted to terminal 72.
Electrical connections
Electrical connection of the indoor unit (cont.)
6222080
Installation
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