Viessmann GC1 Installation And Service Instructions

51
Heating system designs
System version 17 (cont.)
Codes must be set on every Vitotronic 100.
Required coding
01 : 2 Multi−boiler system with cascade control via LON BUS
01 : 3 Multi−boiler system with external cascade control via switching
contacts
02 : 2 Modulating burner operation
*1
03 : 1 Only with Vitotronic 100 for low temperature boilers:
Oil fired operation (irreversible)
*1
0C : 1 Only with Vitotronic 100 for low temperature boilers:
Constant return temperature control
0d : 0 Only with Vitotronic 100 for Vitocrossal300:
Without Therm−Control
4d : 2 Only with Vitotronic 100 for low temperature boilers:
Boiler circuit pump on plug sL
Automatic changeover
4A: 1 Only with Vitotronic 100 for low temperature boilers:
Connecting temperature sensor T1 to plugaJA
*1
If required.
5862730GB

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English