Technical data

18
Heating system designs
System version 5 (continued)
Coding must be set on every Vitotronic 100, GC1.
Vitotronic 100, GC1
Required coding
01: 2 Multi-boiler system with cascade control via LON BUS
02: 2 Modulating burner operation
*1
03: 1 Oil fired operation (non-reversible)
*1
07: 2
07: 3
07: 4
Setting the boiler number on the Vitotronic of
boiler 2
boiler 3
boiler 4
0C: 1 Constant regulation of the return temperature
4d: 2 Boiler circuit pump on plug sL
77: 2
77: 3
77: 4
Setting the LON participant number on the Vitotronic of
boiler 2
boiler 3
boiler 4
Automatic changeover
4A: 1 Connecting the T1 temperature sensor to plug aJA
Vitocontrol-S, VD2/CT3/CM2
Required coding
00: 3,
00: 4,
00: 7,
or
00: 8
Without system circuit A1
*1
35: 1
35: 2
35: 3
Vitocontrol-S, VD2/CT3/CM2 with
one Vitotronic 100, GC1
two Vitotronic 100, GC1
three Vitotronic 100, GC1
*1
If required.
Possible applications
For example, older systems or systems in nurseries and/or systems, where the hydraulic conditions cannot be clearly
defined and/or systems where downstream heating circuits cannot be controlled.
Temperature sensor T1 closes the three-way mixing valve in proportion and therefore protects the boiler, if the required
minimum return temperature is not achieved. The temperature sensor in the low loss header controls the supply
temperature.
Please note:
Size the boiler circuit pumps for each boiler so that their volume supply is at least as large as the max. total heating circuit
volume supply.
Recommendation: 110%
The connection diagram is only a recommendation and needs to be verified for completeness and functionality at the
installation site. Single-phase and three-phase pumps must be connected with field supplied motor contactors and/or motor
starters.
5351 340 v1.4
IMPORTANT