Viessmann B2TA, Installation And Service Instructions For Contractors

Page: 60 / 144

60
Coding in the delivered condition Possible change
Min. flow temperature heating circuit
C5:20 Electronic minimum flow tempera-
ture limit 20 °C (only in operation
with standard room temperature;
only for weather-compensated
control units) C5:1
to
C5:127 Minimum limit adjustable from 1 to
127 °C (limited by boiler-specific pa-
rameters)
Max. flow temperature heating circuit
C6:74 Electronic maximum flow tempera-
ture limit 74 °C (only for weather-
compensated control units) C6:10
to
C6:127 Maximum limit adjustable from 10 to
127 °C (limited by boiler-specific pa-
rameters)
Heating program changeover
d5:0 With external heating program
changeover (observe setting for
coding addresses "3A", "3b" and
"3C" in the
"General" group).
Operating program switches to
"Constant central heating with re-
duced room temperature" or
"Standby mode" (subject to the
settings of the set reduced room
temperature) (only for weather-
compensated control units).
d5:1 Heating program switches to "Con-
stant operation with standard room
temperature".
Ext. heating program changeover to heating circuit
d8:0 With EA1 extension:
No operating program changeover. d8:1 Operating program changeover via
input DE1.
d8:2 Operating program changeover via
input DE2.
d8:3 Operating program changeover via
input DE3.
Max. pump speed in standard mode
E6:... Only for heating systems without a
heating circuit with mixer:
Maximum speed of the internal
speed-controlled heating circuit
pump in % of the max. speed in
standard mode. Value is specified
by boiler-specific parameters (only
for weather-compensated control
units). E6:0
to
E6:100 Maximum speed adjustable from 0
to 100 %
Min. pump speed
E7:30 Only for heating systems without a
heating circuit with mixer:
Minimum speed of the internal
speed-controlled heating circuit
pump:
30 % of the max. speed (only for
weather-compensated control
units) E7:0
to
E7:100 Minimum speed adjustable from 0 to
100 % of the maximum speed
Screed drying
F1:0 Screed drying disabled (only for
weather-compensated control
units). F1:1
to
F1:6 Only for heating circuit with mixer:
Screed drying adjustable, with
choice of 6 temperature/time profiles
(see page 128)
F1:15 Constant flow temperature 20 °C
Codes
Coding level 1
(cont.)
5773 216 GB
Codes