Technical information

5346540 v1.0 09/2006 Technical information subject to change without notice
External Control Connections Section 4
Section 4.0
Control Demand Connections Overview & BMS Control Interface Considerations
70
Connections and
terminations
Vitotronic 100, GC1 Vitotronic 100, GC1
w/Vitotronic 333
Vitocontrol-S, VD2/
CT3
Vitotronic 333
Vitotronic 300
Plug [143]
Terminals 1 and 2
Stage 1 demand (Coding 01:01)
Stage 1 demand (Coding 01:03)
Boiler Disable Operating program
change/Mixing valve
“open”
Operating program
change/Mixing valve
“open”
Plug [143]
Terminals 2 and 3
Stage 2 demand (Coding 01:01)
Stage 2 demand (Coding 01:03)
Switch in boiler as last in
sequence
Remote disable/mixing
valve “close”
Remote disable/mixing
valve “close”
Plug [146]
Terminals 1 and 2
Change-over demand from
modulation to staging
Change-over demand
from modulation to stag-
ing
N/A Change-over demand
from modulation to
staging
Plug [146]
Terminals 2 and 3
External demand (Coding 01:01)
Boiler Enable (Coding 01:03)
N/A External heat demand External heat demand
[150]Terminal block
Terminals 16 and 18
Burner demand Burner demand N/A Burner demand
[150] Terminal block
Terminals 16 and 17
Burner disable Burner disable N/A Burner disable
[151] Terminal block
Terminals 19 and 20
Burner/Control disable Burner/Control disable N/A Burner/Control disable
Notes:
Refer to manual for specific coding changes. Functions of Vitotronic 100, GC1 change when communicating to Vitocontrol-S, VD2/CT3/VB2/RS/GS.
Coding 01:01 allows boiler to maintain minimum boiler water temperature independent of external control.
Coding 01:03 allows boiler not to maintain minimum boiler water temperature. When call for heat takes place, minimum temperature must be satisfied.
Coding 01:03 does not allow boiler to maintain minimum boiler water temperature unless terminals 2 and 3 of Plug [146] are closed.
Dry contact to Plug [143] terminals 1 and 2 as well as 2 and 3 for low/high fire respectively.
When using Plug [146] in BMS applications, contact closure is required to demand burner.
When jumper between 16 and 17 is not present either through control disable from BMS or other device, the control override function will not provide a call for heat to burner.
External demand control set point for Plug [146] (terminals 2 and 3) is adjustable at address 9b for Vitotronic 100, GC1 standalone or Vitocontrol-S, CT3/VD2 control.
BMS Control Interface Considerations
Control Burner Demand Considerations
 143 Demand Dry-contact
 146 Demand Dry-contact
 150 Demand Dry-contact
 143/146 Demand Dry-contact
 0-10VDC Demand signal
Burner Modulation Considerations
 0-10VDC signal direct to burner
 Modulation by control
 90 terminal connections for BMS
How to Demand Burner? How to Modulate Burner?
Control Demand Connections Overview
CAUTION
!
Ensure that all connections and
functions are understood to achieve
the desired response and result of
burner control and modulation.