Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 91
Type gw5b & mw1b, digital boiler control unit & weather-compensated digital cascade control unit
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Also See for VITOTRONIC 300:
- Installation and service instructions manual (164 pages) ,
- Operating instructions manual (73 pages) ,
- Technical data manual (8 pages)
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Vitotronic 300, GW5B & MW1B Installation and Service
"General" Group
Coding in the factory set condition
99:0
Connection at terminals 2 and 3 in plug aVD
disabled (external blocking/ external "Mixing
valve closed") (see page 36).
9A:0
Connection at terminals 1 and 2 in plug aVD
disabled (external "Mixing valve open")
(see page 36).
9B:70
Set supply temperature for external demand
158° F (70° C).
9C:20
With LON communication module:
Monitoring LON participants.
If there is no response from a participant after
20 min., the values specified inside the control
unit are used. Only then will a fault message
be issued.
9F:8
Differential temperature 8 K; only in
conjunction with heating circuits with mixing
valve M2 and M3.
(continued)
Possible change
99:1
No function.
99:2
External "Mixing valve closed"
Heating circuit with mixing valve
M2 (heating circuit 2).
99:3
No function.
99:4
External "Mixing valve closed"
Heating circuit with mixing valve
M3 (heating circuit 3).
99:5
No function.
99:6
External "Mixing valve closed"
Heating circuits with mixing valve M2
(heating circuit 2) and M3 (heating circuit 3).
99:7
No function.
99:8
External blocking.
99:9
No function.
99:10
External blocking/external
"Mixing valve closed"
Heating circuits with mixing valve M2
(heating circuit 2) and M3 (heating circuit 3).
99:11
No function.
99:12
External blocking/external
"Mixing valve closed"
Heating circuit with mixing valve
M3 (heating circuit 3).
99:13
No function.
99:14
External blocking/external
"Mixing valve closed"
Heating circuits with mixing valve M2
(heating circuit 2) and M3 (heating circuit 3).
99:15
No function.
9A:1
No function.
9A:2
External "Mixing valve open"
Heating circuit with mixing valve M2
(heating circuit 2).
9A:3
No function.
9A:4
External "Mixing valve open"
Heating circuit with mixing valve M3
(heating circuit 3).
9A:5
No function.
9A:6
External "Mixing valve open"
Heating circuits with mixing valve M2 (heating
circuit 2) and M3 (heating circuit 3).
9A:7
No function.
9B:0
Set value adjustable from 32 to 260° F
to
(0 to 127° C).
9B:127
9C:0
No monitoring.
9C:5
Time adjustable from 5 to 60 min.
to
9C:60
9F:0
Differential temperature adjustable from 0 to
to
40 K.
9F:40
Code 2, Vitotronic 300-K
91
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