Viessmann B2TF Installation And Service Instructions Manual page 63

Boiler
(cont.)
1432.1 "Residual head control of primary circuit pump"
Setting
1432.2 "Operating mode of primary circuit pump"
Setting
1503.0 "Minimum heating output"
Setting
1606.0 "Minimum burner pause time"
Setting
1606.4 "Integral threshold for burner switch-off"
Setting
Explanations
Residual head limit value for reducing pump speed of
the internal circulation pump, in mbar
0 Internal circulation pump is controlled in line with the
outside temperature
1 to 255 Internal circulation pump is operated with constant re-
sidual head.
Recommended setting: 120 mbar
≙
1 step 1 mbar
Explanations
0 Internal circulation pump is operated with constant dif-
ferential pressure.
1 to 20 Internal circulation pump is operated with rising differ-
ential pressure.
Adjustable from 1 to 20 mbar
Explanations
A limit can be set on the minimum heating output for
heating mode.
... Delivered condition specified by settings specific to
the appliance
5 to 100 Adjustable from 5 to 100 %
Explanations
The minimum burner pause time can be set subject to
boiler load.
0 Fixed setting for minimum burner pause time
1 Delivered condition, integral method (see parameter
1606.4)
Explanations
Only effective if parameter 1606.0 has been set to 1.
50 Factory setting 50 K x min
5 to 255 Adjustable from 5 to 255 K x min
The higher the value, the later the burner switches off.
System configuration (parameters)
63