47
Plug Sensor Type
F16 Room temperature sensor, cooling circuit
■
Required for separate cooling circuit SKK
■
Recommended for heating/cooling circuit without mixer A1/HC1
NTC 10 kΩ
F20 Boiler temperature sensor, external heat generator NTC 10 kΩ
F21 For heat pump cascades: Swimming pool flow temperature sensor NTC 20 kΩ
F23 For heat pump cascades: Buffer outlet temperature sensor NTC 10 kΩ
aVG
KM-BUS (wires interchangeable)
Use the KM-BUS distributor (accessories) if several devices are connected.
KM-BUS subscribers (examples):
■
Remote control (set heating circuit allocation on the remote control)
■
EA1 extension, AM1 extension
Mixer extension kit for heating circuit M3/HC3
—
sVA
Modbus (do not interchange the wires)
Connection for energy meter of photovoltaic system
—
J1 Jumper for Modbus terminator
Terminator active (delivered condition)
Terminator not active
—
X18 Modbus (do not interchange the wires)
■
Connected at the factory: Modbus 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 —
Swimming pool heating
Note
■
Swimming pool heating is controlled via EA1 exten-
sion with KM BUS.
■
In heat pump cascades, install swimming pool flow
temperature sensor downstream of "swimming pool"
3-way diverter valve. Connect flow temperature sen-
sor to connection F21 on the controller and sensor
PCB of the lead heat pump.
■
Make connections to EA1 extension only in accord-
ance with Fig. 41.
■
A filter circuit pump cannot be controlled via the heat
pump control unit.
Installation sequence
Electrical connection (cont.)
6199585
Installation
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