Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 126

Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
97: 2 General
98: 1
General
99: 0 General
9A: 0 General
9b: 70 General
126
The outdoor temperature of
the sensor connected to the the sensor connected to the
control unit is transmitted
via the LON BUS to any
Vitotronic 200-H units
which may be connected
Viessmann system number
(in conjunction with
monitoring of several
systems within one LON
BUS system)
Connection at terminals "2"
and "3" in plug aVD
(External disable/"Close (E t l di bl /"Cl
mixing valve externally not mixing valve" externally not
active)
Connection at terminals "1"
and "2" in plug aVD
("Open mixing valve" ("O i i l "
externally not active) externally not active)
Desired supply temperature pp y p
70 °C / 158 °F with 70 °C / 158 °F i h
external request (input aVH)
New coding Possible change
Address:
Value
97: 0 Not transmitted to heating circuit controls
97: 1 The outdoor temperature is acepted by any
heating circuit controls which may be
connected
98: 1 System number selectable from 1 to 5
to
98: 5
99: 1 Contact effective for:
Without function
99: 2 "Close mixing valve", mixing valve circuit M2
99: 3 Without function
99: 4 "Close mixing valve", mixing valve circuit M3
99: 5 Without function
99: 6 "Close mixing valve", mixing valve circuits M2
and M3
99: 7 Without function
99: 8 External disable
99: 9 Without function
99: 10 External disable and "Close
mixing valve", mixing valve circuit M2
99: 11 Without function
99: 12 External disable and "Close
mixing valve", mixing valve circuit M3
99: 13 Without function
99: 14 External disable and "Close mixing valve",
mixing valve circuits M2 and M3
99: 15 Without function
9A: 1 Contact effective for:
Without function
9A: 2 "Open mixing valve", mixing valve circuit M2
9A: 3 Without function
9A: 4 "Open mixing valve", mixing valve circuit M3
9A: 5 Without function
9A: 6 "Open mixing valve", mixing valve circuits M2
and M3
9A: 7 Without function
9b: 0 Input aVH blocked
9b: 1 Desired supply temperature selectable from
to 1 to 127°C / 34 to 261°F
9b: 127