Viessmann Vitodens 333-F Service Instructions Manual page 53

Code 2
(cont.)
Value Internal circu-
address lation pump
34: ...
10 OFF
11 OFF
12 OFF
13 OFF
14 OFF
15 OFF
16 ON
17 ON
18 ON
19 ON
20 ON
21 ON
22 ON
23 ON
Coding in the delivered condition
Boiler/burner
38:0 Status burner control
unit: Operational (no
fault)
51:0 Internal circulation
pump is always started
when there is a heat de-
mand
52:0 Without flow tempera-
ture sensor for low loss
header
53:3 Never adjust
54:0 Never adjust
Heating circuit Heating circuit
pump pump
Heating circuit Heating circuit
without mixer with mixer
Control funct. OFF
Control funct. OFF
OFF Control funct.
OFF Control funct.
OFF OFF
OFF OFF
Control funct. Control funct.
Control funct. Control funct.
Control funct. OFF
Control funct. OFF
OFF Control funct.
OFF Control funct.
OFF OFF
OFF OFF
Possible change
38:≠0
51:1
52:1
Coding
Circulation
pump for cylin-
der heating
Control funct.
OFF
Control funct.
OFF
Control funct.
OFF
Control funct.
OFF
Control funct.
OFF
Control funct.
OFF
Control funct.
OFF
Status fault, burner con-
trol unit
When there is a heat de-
mand, the internal circu-
lation pump will only be
started when the burner
is operational. System
with heating water buffer
cylinder.
With flow temperature
sensor for low loss head-
er (automatic recognition)
53