Viessmann Vitodens 333 Service Instructions Manual page 46

Coding
Code 2
(cont.)
Coding in the delivered condition
21:0 No maintenance inter-
val (hours run) selected
23:0 No time interval for
burner service selected
24:0 The maintenance dis-
play has been reset
25:0 : No outside tem-
perature sensor or re-
mote monitoring
recognised (only for
constant temperature
control units)
28:0 No burner interval igni-
tion
2E:0 Without external exten-
sion
2F:0 Program disabled
30:1 Internal variable speed
circulation pump (auto-
matic adjustment)
31:... Set speed of the inter-
nal circulation pump
when operated as boiler
circuit pump in %, de-
faulted by the boiler
coding card
32:0 Influence of the signal
"External blocking" on
the circulation pumps:
All pumps in control
function
Note
Generally, the burner will be blocked.
46
Possible change
21:1 The number of hours run
to before the burner should
21:9999 be serviced is adjustable
from 1 to 9999 h
23:1 Interval adjustable from 1
to to 24 months
23:24
24:1 Maintenance display (the
value is displayed auto-
matically)
25:1 Outside temperature sen-
sor and fault monitoring
recognised
28:1 The burner will be force
started for 30 s after 5 h
2E:1 With external extension
(automatic recognition)
2F:1 Venting program enabled
2F:2 Filling program enabled
30:0 Internal circulation pump
without variable speed
(e.g. temporarily for ser-
vice)
31:0 Set speed adjustable
to from 0 to 100%
31:100
32:1 Influence of the signal
to "External blocking" on
32:15 the circulation pumps:
see the following table