42
Plug
Sensor
Type
F6
(X25.5/X25.6)
Cylinder temperature sensor, top
NTC 10 k
Ω
F7
(X25.7/X25.8)
Cylinder temperature sensor, bottom
NTC 10 k
Ω
F11
Contact humidistat 24 V
–
Note
If a 230 V~ contact humidistat (connection to X3.8/X3.9) is used for cooling,
insert a jumper
, otherwise the heat pump will not start (message
"CA Pro-
tectn device primry"
).
―
F12
Flow temperature sensor, heating circuit with mixer M2/HC2
NTC 10 k
Ω
F13
System flow temperature sensor (downstream of the heating water buffer cyl-
inder and mixer for external heat generator)
NTC 10 k
Ω
F14
Flow temperature sensor, cooling circuit (heating circuit without mixer A1/HC1
or separate cooling circuit SKK)
NTC 10 k
Ω
F16
Room temperature sensor, cooling circuit
■
Required for separate cooling circuit SKK
■
Recommended for heating/cooling circuit without mixer A1/HC1
NTC 10 k
Ω
F20
Boiler water temperature sensor, external heat generator
NTC 10 k
Ω
F21
For heat pump cascades: Swimming pool flow temperature sensor
NTC 20 k
Ω
F23
For heat pump cascades: Buffer outlet temperature sensor
NTC 10 k
Ω
aVG
KM-BUS (wires interchangeable)
Use the KM-BUS distributor (accessories) if several devices are connected.
KM-BUS subscriber (examples):
■
Extension kit mixer for heating circuit M3/HC3
■
Remote control (set heating circuit allocation on the remote control)
■
EA1 extension, AM1 extension
■
Communication interface Vitocom 100, type GSM2
—
sVA
Modbus 2 (wires
not
interchangeable)
Connection for electricity meter of photovoltaic system
—
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 condition)
—
X18
Modbus 1
Connection for Viessmann appliances, e.g. Vitovent 300-F
Note
If further Viessmann appliances are to be connected to Modbus 1, plug in the
Modbus distributor (accessories) (see "Modbus distributor" installation in-
structions).
—
X24
Connection for LON communication module (see "LON communication mod-
ule" installation instructions)
—
X31
Coding card slot
—
Installation sequence
Electrical connection
(cont.)
5790 931 GB
Installation