Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual page 15

System version 3
(cont.)
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
03: 1 Oil fired operation (non-reversible)
Setting the boiler number on the Vitotronic of
07: 2 boiler 2
07: 3 boiler 3
07: 4 boiler 4
0C: 1 Constant regulation of the return temperature
Boiler circuit pump on plug sL
4d: 2
Setting the LON participant number on the Vitotronic of
77: 2 boiler 2
77: 3 boiler 3
77: 4 boiler 4
Automatic changeover
Connecting the T1 temperature sensor to plug aJA
4A: 1
Vitotronic 300-K, MW1S
Required coding
00: 3, Without system circuit A1
00: 4,
00: 7,
or
00: 8
Vitotronic 300-K, MW1S with
35: 1 one Vitotronic 100, GC1
35: 2 two Vitotronic 100, GC1
35: 3 three Vitotronic 100, GC1
Possible applications
For example, older heating systems or systems in nurseries 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.
Please note:
Size the boiler circuit pump for each boiler so that their volume flow rate is at least as large as the max. total heating circuit
volume flow rate.
Recommendation: 110%
IMPORTANT
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.
*1
If required.
*1
*1
*1
Heating system designs
15