157
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Coding in the factory set condition
Possible change
“Minimum system supply temperature limit”
36:0
Set to 32°F (0°C).
36:1
to
36:127
Adjustable from 32°F to 261°F
(0 to 127°C) (only when operating with
standard room temperature).
“Maximum system supply temperature limit”
37:80
Set to 176°F (80°C).
37:20
to
37:127
Adjustable from 68°F to 261°F
(20 to 127°C).
Note:
Value must be lower than the
lowest value of coding “06” in the
“Combustion controller” group of every
control unit.
“Boiler section 1 or boiler sequence changeover”
38:0
No boiler section boiler sequence
changeover
Do not adjust!
38:1
Boiler section 1 changeover:
Every first day of the month, the boiler
with the shortest number of hours run
by its burner becomes the boiler section 1.
38:2
to
38:200
Boiler section 1 changeover after 200 to
20,000 hours run
1 step 100 hours run.
“Permanent boiler section 1”
39:0
No permanent lead boiler section.
Do not adjust!
39:1
to
39:8
Permanent lead boiler section is 1, 2, 3,
4, 5, 6, 7 or 8.
“Permanent last boiler”
3a:0
No permanent last boiler section.
Do not adjust!
3a:1
to
3a:8
Permanent last boiler section is 1, 2, 3,
4, 5, 6, 7 or 8.
“Type of control”
3b:1
Standalone parallel boiler circuit:
With supply temperature sensor
(see page 124).
3b:0
Standalone parallel boiler circuit:
Without supply temperature sensor
(see page 124).
3b:2
Standalone serial boiler circuit:
Without supply temperature sensor
(see page 124).
3b:3
Standalone serial boiler circuit:
With supply temperature sensor
(see page 124).
3b:4
Sequential control method with
supply temperature sensor
(see page 124).
“Control strategy”
3c:0
Condensing strategy (see page 125).
3c:1
Conventional boiler strategy 1
(see page 126).
3c:2
Conventional boiler strategy 2
(see page 127).
“Output statement”
3d:1
Output statement for condensing
strategy and conventional boiler strategy 1.
3d:0
No output statement
Control only in accordance with
conventional boiler strategy 2.
“Cascade” Group
(continued)
Coding Level 2
