Viessmann VITOTRONIC 100 GC1B Service Manual download pdf (Page 79)

Installation

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

Write the terminal numbers or

arkings on the drawing for future

reference.

Burner power supply not shown.

A Control unit

(Legend: see wiring diagram)

B 2nd stage or modulating *

C Hours counter, stage 1 *

D Burner fault indicator *

E Control circuit, stage 1/

basic load *

F Burner

fÖ Power supply connection of control

unit 120 VAC

fA Burner, 1st stage

lÖ Burner, 2nd stage

aBÖ Plugs for external equipment

a External safety devices

(remove jumper when connecting)

b External controlled switch-off

(remove jumper when connecting)

aBA Safety circuit. Emergency

shut-off

Refer to burner manufacturer’s instruction on detailed connections for Viessmann controls.

5351 338 v1.6

This is a generic connection drawing

only! Follow the burner

manufacturer’s connection drawings

for Viessmann controls.

CAUTION

a b

Plug connection

located on the

DIN rail. See page

35 for details.

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Viessmann VITOTRONIC 100 GC1B Service Manual Page 79