Viessmann Vitocal 242-S Installation And Service Instructions Manual page 38

Installation sequence
Electrical connection
Plug Sensor
F16 Room temperature sensor, cooling circuit
Required for separate cooling circuit SKK
■
Recommended for heating/cooling circuit without mixer A1/HC1
■
F21 Collector temperature sensor
F23 Solar circuit return temperature sensor
KM BUS (wires interchangeable)
aVG
Use the KM BUS distributor (accessories) if several devices are connected.
KM BUS subscriber (examples):
Extension kit, mixer for heating circuit M2/HC2
■
Remote control Vitotrol 200A or Vitotrol 300B (set the heating circuit assign-
■
ment at 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 Slot for coding card
Swimming pool heating
Note
■ Swimming pool heating is controlled via the
EA1 extension with KM BUS.
Make connections to EA1 extension only in accord-
■
ance with Fig. 30.
A filter circuit pump cannot be controlled via the heat
■
pump control unit.
38
(cont.)
Type
NTC 10 k
Ω
NTC 20 k
Ω
NTC 10 k
Ω
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