Power Supply Connections For Cm2 Junction Box - Viessmann Vitogate 300 Nstallation And Service Instructions

Vitogate 300 Installation and Service

Power Supply Connections for CM2 Junction Box

Legend
A Vitogate 300
B Power supply unit
C RS 485 connection:
Interface for BACnet MS/TP or Modbus RS 485
D Junction box main DIN rail
E Junction box side DIN rail
F Junction box
1. Connect the 24VDC power supply cable (supplied)
to the power supply unit, with the red or brown wire
to the +terminal and the black or blue wire to the
- terminal as shown.
2. Connect the other end of the 24VDC power supply
cable (supplied), into the Vitogate 300, with the red or
brown wire to the +24 terminal and the black or blue
wire to the GND terminal as shown.
Note: The power supply plug in the Vitogate 300 can
be easily removed to aid with wiring connection.
3. Make a connection from the power supply unit L and N
connections to any vacant L and N connections of the
junction box terminals 14 thru 17.
Power supply via the mains isolator
When the heating system is switched off via the mains
isolator, the Vitogate 300 and the Vitotronic control unit
are also switched off.
No data is transferred to the BACnet or Modbus control
system.
WARNING
Incorrect core allocation can result in serious injury and
damage to the appliance. Take care not to interchange
wires "L" and "N"
For more details refer to the Installation and
Service Instructions applicable to the boiler.
Installation
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