Viessmann VITOTRONIC 100 GC1B Service Manual download pdf (Page 78)

Installation

Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only)

For burners with plug-in connection

The burner cables are included in the

standard delivery of the Vitotronic.

Connect the burner in accordance with

applicable codes.

ATo boiler control unit

BTo burner

Terminal codes

L1 Phase via fixed high limit to the

burner

? Ground connection

N Neutral connection to the burner

T1,T2 Control circuit

S3 Connection for burner fault

indicator

B4 Connection for burner hours

counter

A To plug-in connection in connection

enclosure

B To burner

1.Disconnect power to burner and

boiler control.

2. Connect plugs fA and plug lÖ to

respective counter plugs in boiler

control unit.

3. Connect the 7-pole plug fA and the

3-pole plug lÖ to the burner.

Terminal codes

1,2,3 Control circuit ”2nd stage

burner or modulation controller”

(via two-point controller with

2-stage operation;

via three-point controller with

modulating operation)

1 From burner

2 Modulating down

3 Modulating up/2nd stage ON

Colour codes as applicable

BK Black

BN Brown

BU Blue

5351 338 v1.6

120 VAC

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 131 132

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Viessmann VITOTRONIC 100 GC1B Service Manual Page 78

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