Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 102

Code 2
"Heating circuit ..."/group 5
Parameter
Address A3:...
–6
–5
–4
–3
–2
–1
0
1
2
to
15
Coding in the delivered condition
A4:0 With frost protection (only
for weather-compensa-
ted control units)
A5:5 With heating circuit pump
logic function (economy
control): heating circuit
pump "OFF" when the
outside temperature (AT)
is 1 K higher than the set
room temperature (RT
AT > RT
weather-compensated
control units)
Parameter address
A5:...
1
2
102
(cont.)
Heating circ pump
"ON"
–7 °C
–6 °C
–5 °C
–4 °C
–3 °C
–2 °C
–1 °C
0 °C
+1 °C
to
+14 °C
)
set
+ 1 K (only for
set
With heating circuit pump logic function: Heating cir-
cuit pump "OFF"
AT > RT + 5 K
set
AT > RT + 4 K
set
"OFF"
–5 °C
–4 °C
–3 °C
–2 °C
–1 °C
0 °C
+1 °C
+2 °C
+3 °C
to
+16 °C
Possible change
A4:1 No frost protection; this set-
ting is only possible if code
"A3:–9" has been selec-
ted.
!
A5:0 Without heating circuit
pump logic function
A5:1 With heating circuit pump
to logic function: Heating cir-
A5:15 cuit pump "OFF"; see fol-
lowing table
Please note
"Important" to ob-
serve for coding ad-
dress "A3".