Viessmann B2TB, Installation And Service Instructions For Contractors, Page: 74 / 156

74
"CO limiter"
Setting Explanations
Learning mode 49:0
Sensor monitoring and fault messaging en-
abled 49:1
Deactivated 49:2
DHW
Note
Parameter values in bold are factory settings.
"Selection of set DHW temperature"
Setting Explanations
Between 10 ... 60 °C 56:0 Set DHW temperature adjustable from 10 to
≤
60 °C
10 °C .. programmed maximum value 56:1 Set DHW temperature adjustable from 10 to > 60 °C
Note
Max. value subject to boiler coding card.
Observe the maximum permissible DHW temperature.
"Selection of DHW temperature setting range"
Setting Explanations
Use of parameter GWG5A 57:0 Never adjust
Use of parameter GWG5E 57:1 Never adjust
"Additional function for DHW heating"
Setting Explanations
0 .. 9: Without auxiliary function for DHW
heating 58:0
... Set value °C 58:10 to
58:60 Entry of a 2nd set DHW temperature
Adjustable from 10 to 60 °C (observe parameter "56")
Activate 4th time phase in DHW time program
"Cylinder heating: Set start point"
Setting Explanations
2.5 K below set value 59:0
... K below set value 59:1 to
59:10 Start point adjustable from 1 to 10 K below set value
"Loading pump connection"
Setting Explanations
Output 28, main PCB 5A:0 Never adjust
Internal H1 extension 5A:1 Never adjust
"DHW cylinder hydraulic connection"
Setting Explanations
Directly at boiler or upstream of low loss
header 5B:0
Downstream of low loss header 5B:1
Parameter level 2
Boiler
(cont.)
5789 302 GB
Parameter