49
Plug
Sensor/component
Type
J3
Jumper for terminator Modbus 2
Terminator enabled (delivered condition)
Terminator disabled
—
J4
Jumper for setting master/slave Modbus 2
Heat pump control unit is slave
Heat pump control unit is master (delivered condi-
tion)
—
X18
Modbus 1
Connection for EEV PCB in the heat pump (refrigerant
circuit controller
[4]
): See service instructions for
"Vitotronic 200".
Note
If other Viessmann appliances are to be connected to
Modbus 1 (e.g. Vitovent 300-F), insert Modbus distributor
(accessory): See installation instructions for "Modbus dis-
tributor".
—
X24
Connection, LON communication module (accessory):
See installation instructions for"LON communication
module".
—
X25
LV cable < 42 V to heat pump (accessory)
—
X31
Coding card slot
—
Note
Flow temperature sensor for heating
circuit with mixer M3/HC3:
The flow temperature sensor for one
heating circuit with mixer M3/HC3 is con-
nected to the mixer extension kit (acces-
sory).
Installation sequence
Electrical connections, heat pump control unit
(cont.)
5516 436 GB
Installation