Viessmann C3TB, Installation And Service Instructions For Contractors

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94
Coding in the delivered condition Possible change
Service interval in months
23:0 No time set for burner service in-
terval 23:1
to
23:24 Interval adjustable from 1 to
24 months
Service status
24:0 "Service" not shown on the dis-
play
24:1 "Service" shown on the display.
The address is set automatically and
must be reset manually after a serv-
ice.
Filling/venting
2F:0 Venting program/fill program disa-
bled 2F:1 Venting program enabled
2F:2 Fill program enabled
"DHW"
Select "DHW" (see page 92).
Coding
Coding in the delivered condition Possible change
Enable DHW circulation pump
73:0 DHW circulation pump: "ON" ac-
cording to time program 73:1
to
73:6 During time program
"ON" for 5 min once an hour up to
"ON" for 5 min six times an hour
73:7 Permanently "ON"
"Heating circuit ..."
Select "Heating circuit ..." (see page 92).
Coding
Coding in the delivered condition Possible change
Economy function, outside temperature
A5:5 With heating circuit pump logic
function (economy control): Heat-
ing circuit pump "OFF" when the
outside temperature (OT) is 1 K
higher than the set room tempera-
ture (RT
set
)
OT
>
RT
set
+ 1 K
A5:0 Without heating circuit pump logic
function
A5:1
to
A5:15 With heating circuit pump logic func-
tion: heating circuit pump "OFF"; see
following table
Parameter address A5:... With heating circuit pump logic function: Heating circuit pump "OFF"
1 OT
>
RT
set
+ 5 K
2 OT
>
RT
set
+ 4 K
3 OT
>
RT
set
+ 3 K
4 OT
>
RT
set
+ 2 K
5 OT
>
RT
set
+ 1 K
6 OT
>
RT
set
Codes
Coding level 1
(cont.)
5775 636 GB
Codes