Viessmann GC1 - Cascade Group; DHW Group

Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
5793 309 - 05
130
“Cascade” Group
Coding 1, Vitotronic 300-K
Coding
Coding in the factory set condition Possible change
Number of boilers in cascade
35:4 4 boilers connected to the Vitotronic
300-K.
35:1
to
35:4
1 to 4 boilers connected to the
Vitotronic 300-K.
Min. system supply temperature
36:0 Electronic minimum system supply
temperature limit set to 32°F (0°C).
36:1
to
36:127
Minimum limit adjustable from 32 to
260°F (0 to 127°C).
Max. system supply temperature
37:80 Electronic maximum system supply
temperature limit set to 176°F (80°C).
37:20
to
37:127
Maximum limit adjustable from 68 to
260°F (20 to 127°C).
Note: Value must not be higher than the
lowest value of coding address
“06” in the “Boiler” group of
every Vitotronic 100, GC1B.
Control type
3B:1 Stand-alone parallel boiler circuit with
supply temperature sensor
(see page 110).
3B:0 Stand-alone parallel boiler circuit without
supply temperature sensor (see page 110).
3B:2 Stand-alone serial boiler circuit without
supply temperature sensor (see page 110).
3B:3 Stand-alone serial boiler circuit with supply
temperature sensor (see page 110).
3B:4 Sequential control with supply
temperature sensor (see page 110).
Control strategy
3C:2 Conventional strategy 2 (see page 112). 3C:0 Condensing strategy (see page 111).
3C:1 Conventional strategy 1 (see page 111).
Coding
Coding in the factory set condition Possible change
DHW
67:40 For solar DHW heating:
Set DHW temperature 104°F (40°C).
Reheating is suppressed above the selected
set temperature (DHW heating by the boiler
only if solar energy is not sufficient).
67:0 No third set value.
67:10
to
67:95
Set DHW temperature adjustable from 50
to 203°F (10 to 95°C) (limited by boiler
specific parameters).
Observe the setting of coding address “56”.
Enable DHW recirculation pump
73:0 DHW recirculation pump:
“ON” according to time program.
73:1
to
73:6
“ON” from once per hour for 5 min. up to
6 times per hour for 5 min. during the time
program.
73:7 Constantly “ON”.
“DHW” Group