Operating instructions
89
Installation
Connecting an AC burner
Pressure−jet oil/gas burners
Connect the burner in accordance with the DIN 4791 or local regulations.
The burner cables are included in the standard boiler delivery.
Max. power consumption 6 (3) A.
A To control unit
B To burner
Burner without plug
Install the mating plug supplied by
Viessmann or the burner manufacturer;
connect the burner cable.
Terminal codes
L1 Phase via high limit safety
cut−out to the burner
PE Earth conductor to burner
N Neutral conductor to burner
T1,T2 Control chain
S3 Burner fault
B4 Hours run meter
B Signal pass direction:
Control unit → burner
Y Signal pass direction:
Burner → control unit
Equipment codes
STB High limit safety cut−out of
control unit
TR Control thermostat of the
control unit
H1 Burner fault signal
BZ Hours run meter
5862730GB
A
B
Fault H1