91
Installation
Connecting an AC burner (cont.)
Atmospheric burner
The burner cables are included in the standard boiler delivery.
Max. power consumption 6(3)A.
BK ³B4
BK* ³S3
BU ³N
BN ³T2
A To control unit
B To burner
Colour coding to DIN IEC60757
BK black
BK* black with imprint
BN brown
BU blue
Terminal codes
L 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
Terminal codes
T6, T8 Control chain
Burner stage 2ON via two
point controller
T6, T7 Control chain
Burner stage 2OFF
~ Signal pass direction:
Control unit³burner
| Signal pass direction:
Burner³control unit
5862730GB
A
B
BK BK* BU BN
BN
BK
BU
A
90
T7T8
T6
B
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