Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 60 / 148

Coding in
the as
delivered
condition
Address:
value Function mode Coding
change
Address:
value Possible change
21:0 No maintenance indica-
tion
Burner 21:1
to
21:100 The number of hours run
before the burner should
be serviced is adjustable
from 100 to 10000 hours
(each step represents
100 hours)
23:0 No time interval for bur-
ner maintenance 23:1
to
23:24 Time interval adjustable
from 1 to 24 months
24:0 No "Maintenance" dis-
play 24:1 "Maintenance" display
(the address is automati-
cally set and must be
manually reset after
maintenance has been
completed)
25:0
* 1
No recognition of out-
side temperature sen-
sor or remote
monitoring
25:1 Recognition of outside
temperature sensor and
fault monitoring
28:0 No burner interval igni-
tion 28:1 The burner is forced ON
once every 24 hours
2E:0 Without external exten-
sion 2E:1 Including external exten-
sion (automatical adjust-
ment on connection)
2F:0 Venting program dis-
abled 2F:1 Venting program enabled
2F:2 Filling program enabled
30:1 Internal variable speed
circulation pump (auto-
matic adjustment) 30:0 Internal circulation pump
without variable speed
(e.g. temporarily for ser-
vice)
31:65 Set speed of the inter-
nal circulation pump
when operated as boiler
circuit pump 65 %,
defaulted by the boiler
coding card 31:0
to
31:100 Set speed adjustable
from 0 to 100 %
Code 2
(cont.)
44
Coding
56
92
550
GB
*1
Only for constant temperature control units.