Power Supply Independent Of The Mains Isolator - Viessmann Vitogate 300 Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)
C
BN
L1
GNYE
PE
B
BU
N
Fig. 7
A Vitogate 300
Power supply 100 to 240 V~, 50 to 60 Hz
B
Fuse (max. 16 A)
C
Mains isolator, 2-pole, on site (if installed)
D
1. Connect the 24 V connections (on the
Vitogate 300) and OUTPUT (on the power supply
unit) using the connecting cable supplied (0.4 m
long).
2. Check whether the power cable to the Vitotronic
control unit has appropriate fuse protection.
3. Terminate the power cable on site in terminal box
and at plug .
E fÖ
Danger
Incorrect core assignment can result in seri-
ous injury and damage to the appliance.
Take care not to interchange wires "L1" and
"N":
L1 Brown (BN)
N Blue (BU)
PE Green/yellow (GNYE)

Power supply independent of the mains isolator

When the heating system is switched off via the mains
isolator, the Vitogate 300 remains on, whilst the
Vitotronic control unit is switched off.
12
A
+24 V GND
+ -
G
L N
100-240 V AC
D
E
24 V DC
F
L
N
E Junction box (on-site)
Vitotronic control unit power supply (plug
F
Power supply unit
G
4. Insert plug into the Vitotronic control unit.
fÖ
No data is transferred to the BACnet or Modbus con-
trol system.
)
fÖ