Viessmann Vitocal 242-S Installation And Service Instructions Manual page 56

Installation sequence
Electrical connection
Plug Sensor
aVG KM BUS (wires interchangeable)
Use the KM BUS distributor (accessories) if several de-
vices are connected.
KM BUS subscriber (examples):
■ Extension kit for one heating circuit with mixer M2/HC2
■ Remote control for Vitotrol 200A or Vitotrol 300B (set
the heating circuit assignment at the remote control)
■ Extension EA1, extension AM1
■ Communication interface Vitocom 100, type GSM
sVA
Modbus 2 (wires not interchangeable)
Connection for electricity meter 1-phase or 3-phase
J3 Jumper for terminator Modbus 2
J4 Jumper for setting master/slave Modbus 2
X18 Modbus 1
Connection for Vitovent 300-F
X24 Connection for LON communication module (see LON
communication module installation instructions)
X31 Coding card slot
Swimming pool heating
Note
■ Swimming pool heating is controlled
via extension EA1 with KM BUS.
■ Make connections to extension EA1
only according to the following dia-
gram.
■ A filter circuit pump cannot be activa-
ted via the heat pump control unit.
56
(cont.)
Terminator enabled (delivered condition)
Terminator disabled
Heat pump control unit is slave
Heat pump control unit is master (delivered condi-
tion)
Type