Viessmann VITODENS 300 Service Instructions Manual page 52

Coding
Code 2
(cont.)
Coding in Function mode
the as
delivered
condition
Address:
value
77:1 LON user number
79:1 * 1 Control unit is fault
manager
7b:1 * 1 Send time to LON
7F:1 * 1 Detached house
80:1 With 5 seconds' time
delay for fault message;
message will be issued,
if a fault persists for at
least 5 seconds
81:1 Automatic summer/win-
ter changeover
88:0 Temperature display in
Celsius
8A:175 Do not adjust
*1
Only for weather-compensated control units.
52
Coding Possible change
change
Address:
value
77:2 LON user number, adjus-
to table from 1 to 99:
77:99 1 - 4 = boiler
5 = cascade
10 - ... = Vitotronic 050
99 = Vitocom
Note
Allocate each number
only once.
79:0 Control unit is not fault
manager
7b:0 Do not send time to LON
7F:0 Multi-occupancy house.
Separate adjustment for
holiday program and time
program for DHW load-
ing, as option.
80:0 Without time delay
80:2 Time delay adjustable
to from 10 to 995; 1 step =
80:199 5 s
81:0 Manual summer/winter
changeover
81:2 The application of the
radio clock module will be
recognised automatically
81:3 Accept time via LON
88:1 Temperature display in
Fahrenheit