Technical data
168
Coding – Vitocontrol-S, VD2/CT3/CM2
Coding 2
(continued)
Overall summary
Coding in the factory setting Possible change
System design
00: 1 See page 164
Multi-boiler control unit
35: 4 4 boilers connected to Vitocontrol-S, VD2/CT3/CM2 35: 1
to
35: 3
1 to 3 boilers connected to Vitocontrol-S,
VD2/CT3/CM2
36: 0 Electronic minimum system supply temperature limit
set to 0˚C / 32˚F
36: 1
to
36:127
Electronic minimum system supply temperature
limit adjustable from 0 to 127˚C / 32 to 261˚F
37: 80 Electronic maximum system supply temperature
limit
set to 80˚C / 176˚F
37: 20
to
37:127
Electronic maximum system supply temperature
limit adjustable from 20 to 127˚C / 68 to 261˚F
38: 0
No changing of lead boiler and the boiler sequence
Please note:
In multi-boiler systems, where one boiler is
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38: 1 Changing the lead boiler:
Every 1
st
day of the month, the boiler with the
burner which has operated for the shortest number
of hours, becomes lead boiler
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permamently provided as standby boiler, change
that boiler over to become the active boiler only in
longer intervals, e.g. as part of the annually required
system inspection.
38: 2
to
38:200
Changing the lead boiler:
After 200 to 20
,,
000 run hours, the boiler with the
next higher number (coding address 07 of
Vitotronic 100) becomes lead boiler;
1 setting step = 100 run hours
39: 0 No permanent lead boiler 39: 1
to
39: 4
Boiler 1, 2, 3 or 4 is permanent lead boiler
3A: 0 No permanent last boiler 3A: 1
to
3A: 4
Boiler 1, 2, 3 or 4 is permanent last boiler
3b: 1 Autonomous boiler parallel connection with supply
temperature sensor
3b: 0 Autonomous boiler parallel connection without
supply temperature sensor
3b: 2 Autonomous boiler series connection without
supply temperature sensor
3b: 3 Autonomous boiler series connection with supply
temperature sensor
3b: 4 Sequential type of control with supply temperature
sensor
3C: 2 Net calorific strategy 2
(see page 127)
3C: 0 Gross calorific strategy
(see page 126)
3C: 1 Net calorific strategy 1
(see page 127)
5351 340 v1.4