Cascade" Group - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Code 2

"Cascade" Group

Coding
Coding in the factory set condition
35:4 4 boilers connected to the Vitotronic 300-K
36:0 Electronic minimum system supply
temperature limit set to 32° F (0° C)
37:80 Electronic maximum system supply
temperature limit set to 176° F (80° C)
38:0 No changeover between lead boilers and boiler
sequence
See chapter "Cascade control".
39:0 No permanent lead boiler
3A:0 No permanent last boiler
3B:1 Stand-alone parallel boiler connection with
supply temperature sensor
3C:0 Condensing strategy
(see page 78)
3D:1 Output statement for condensing strategy and
conventional boiler strategy 1
3E:0 Distribution pump will only run if heat demand
exists.
3F:0 Without DHW tank priority control for
distribution pump
41:31 No ECO threshold boiler 1
52
Vitotronic 200 and 300-K Installation and Service
Possible change
35:1 1 to 8 boilers connected to the Vitotronic 300-K
to
35:8
36:1 Electronic minimum system supply temperature
to limit adjustable from 32 to 260° F (0 to 127° C)
36:127
37:20 Electronic maximum system supply temperature
to limit adjustable from 68 to 260° F (20 to 127° C)
37:127
38:1 Lead boiler changeover:
Every first day of the month, the boiler with the
burner that has operated for the shortest number
of hours becomes lead boiler
38:2 Lead boiler changeover after 200 to 20,000
to hours run 1 step
8:200
39:1 Permanent lead boiler is boiler ...
to
39:8
3A:1 Permanent last boiler is boiler ...
to
3A:8
3B:0 Stand-alone parallel boiler connection without
supply temperature sensor
3C:1 Conventional boiler strategy 1 (see page 79)
3C:2 Conventional boiler strategy 2 (see page 79)
3D:0 No output statement
Note: Vitotronic 300-K regulates only according
to conventional boiler strategy 2.
3E:1 Distribution pump always runs, shutdown only
via signal "External blocking".
3F:1 With DHW tank priority control for distribution
pump
41:−30 ECO threshold boiler 1 adjustable from
to -22 to +86° F (−30 to +30° C)
41:+30
100 hours run