Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 44

Installation sequence
Electrical connection
Indoor unit: Controller and sensor PCB (LV connections)
Set the required parameters during commissioning:
See page 73 onwards.
Sensors
Plug Sensor
F0 Outside temperature sensor
F4 Buffer temperature sensor
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
F13 System flow temperature sensor (downstream of heating water buffer cylin-
der)
F14 Flow temperature sensor, cooling circuit (heating circuit without mixer A1/HC1
or separate cooling circuit SKK)
F16 Room temperature sensor, cooling circuit
Required for separate cooling circuit SKK
■
Recommended for heating/cooling circuit without mixer A1/HC1
■
F26 Buffer temperature sensor, cooling
KM-BUS (wires interchangeable)
aVG
Use the KM-BUS distributor (accessories) if several devices are connected.
KM-BUS subscribers (examples):
Mixer extension kit 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
■
Modbus (do not interchange the wires)
sVA
Connection for electricity meter of photovoltaic system
J1 Jumper for Modbus terminator
Terminator enabled (delivered condition)
Terminator not active
X18 Modbus (do not interchange the wires)
Connected at the factory: Modbus connecting cable to the outdoor unit
■
or
Modbus distributor (accessories) if additional devices are to be connected,
■
e.g. Vitovent 300-F: See "Modbus distributor" installation instructions.
X24 Connection for LON communication module: See "LON communication mod-
ule" installation instructions
X31 Coding card slot
PWM signal connection for heating circuit pump M2/HC2
a:DA
44
(cont.)
–
Type
NTC 10 k
Ω
NTC 10 k
Ω
―
NTC 10 k
Ω
NTC 10 k
Ω
NTC 10 k
Ω
NTC 10 k
Ω
NTC 10 k
Ω
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