Viessmann GC1 Installation And Service Instructions

139
Coding
Resetting codes to the delivered condition
1. Press L and G simultaneously
for approx. 2s, until the first two
arrows appear in the display.
2. Press e.
Code 1
Calling up code 1
1. Press K and L simultaneously
for approx. 2s, until the first arrow
appears in the display.
Access to coding level 1.
2. Select the required coding address
with a or b,
the address flashes;
confirm with d,
the value flashes.
3. Change the value with a or b;
confirm with d.
The value is saved and does not
flash for approx. 2s. Then the
display flashes again. Further
addresses can now be selected
with a or b.
4. Press K and L simultaneously
for approx. 1s.
Exit coding level 1.
Summary
Coding in the delivered condition Possible change
System design
00:1 Boiler control without
DHW heating
00:0 set automatically, if "01:2" or
"01
:3" has been programmed
g
00:2 Boiler control with DHW
heating
System type
01:1 Single boiler system 01:2 Multi−boiler system with
cascade control via LON BUS
(e.g. Vitotronic333, typeMW1)
01:3 Multi−boiler system with
external cascade control via
switching contacts
(inputaVD and aVH)
5862730GB

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English