Viessmann VITOCAL 300-G Installation And Service Instructions For Contractors page 36

Installation sequence
Electrical connection
Plug Sensor/component
F0 Outside temperature sensor
F4 Buffer temperature sensor
F6 Top cylinder temperature sensor
(X25.5/X25.6)
F7 Cylinder temperature sensor, bottom
(X25.7/X25.8)
F12 Flow temperature sensor, heating circuit with mixer M2/HC2
F13 System flow temperature sensor (downstream of the buffer cylinder and mix-
er for external heat generator)
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
■
F20 Boiler water temperature sensor, external heat generator
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
■
Modbus (do not interchange the wires), e.g. connection for energy meter of
sVA
photovoltaic system
J1 Jumper for Modbus terminator
Terminator active (delivered condition)
Terminator not active
X18 Modbus (do not interchange the wires), e.g. Vitovent 300-F
Note
If several appliances are to be connected, use the Modbus distributor (acces-
sories): See "Modbus distributor" installation instructions.
X24 Connection for LON communication module: See "LON communication mod-
ule" installation instructions
X31 Coding card slot
Connection, PWM signal, solar circuit pump
a:DD
Note
Flow temperature sensor for heating circuit with
mixer M3/HC3: The flow temperature sensor for one
heating circuit with mixer M3/HC3 is connected to the
mixer extension kit (accessories).
36
(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
NTC 10 k
Ω
NTC 10 k
Ω
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