Heating Circuit 1, Heating Circuit 2, Heating Circuit 3 - Viessmann Vitocrossal 300 Service Instructions For Contractors

Code 2
Solar
(cont.)
Coding in the delivered condition
27:15 Alternate heating time
15 min.
The DHW cylinder with-
out priority is heated at
most for the duration of
the set alternate heating
time if the DHW cylinder
with priority is heated up.
28:3 Alternate pause duration
3 min.
After the set alternate
heating time for the DHW
cylinder without priority
has expired, the rise in
collector temperature is
captured during the alter-
nate pause duration.

Heating circuit 1, heating circuit 2, heating circuit 3

Coding
Coding in the delivered condition
A0:0 Without remote control
A1:0 All possible settings at
the remote control can be
accessed
A3:2 Outside temperature
below 1 °C: Heating cir-
cuit pump "On"
Outside temperature
above 3 °C: Heating cir-
cuit pump "Off"
84
Possible change
27:5 The alternate heating time
to is adjustable from 5 to
27:60 60 min
28:1 The alternate pause dura-
to tion is adjustable from 1 to
28:60 60 min
Possible change
A0:1 With Vitotrol 200A (auto-
matic recognition)
A0:2 With Vitotrol 300A or
Vitohome 300 (automatic
recognition)
A1:1 Only party mode can be set
at the remote control.
(Only for Vitotrol 200A.)
A3:-9 Heating circuit pump "On/
to Off" (see the following
A3:15 table)