Technical information

Control Overview—Control/Burner Interconnections

Connection of Boiler Control Wiring to Burner

Applicable for Vitotronic 100, GC1 and Vitotronic 300, GW2

1 Control plug end [41]. Plugs

into control.

2 Harness between control and

burner.

3 Burner end of [41] plug

harness. Plugs into burner.

4 Plug-in connection for [90] plug.

modulation function of control.

Socket for [90] plug located in

control connection enclosure.

5 Cabling between control

connection enclosure and

burner.

6 Modulation [90] plug.

Connection made in burner to

allow modulation of burner.

Terminal ID Function

L1 Line voltage via FHL

Ground

N Neutral Connection to the burner

T1, T2 Control Circuit via AHL

S3 Connection for burner fault indicator

B4 Connection for burner hour counter

Terminal ID Function

1 Signal from burner

2 Modulation down

3 Modulation up/2nd stage ON

[90] Plug Terminal Identification

[41] Plug Terminal Identification

Section 3.4

Section 3

Overview

5346540 v1.0 09/2006 Technical information subject to change without notice