166
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Coding address
a3:...
Heating circuit pump
Heating circuit pump “ON”
Heating circuit pump “OFF”
-9
14°F (–10°C)
18°F (–8°C)
-8
16°F (–9°C)
19.5°F (–7°C)
-7
18°F (–8°C)
21°F (–6°C)
-6
19.5°F (–7°C)
23°F (–5°C)
-5
21°F (–6°C)
25°F (–4°C)
-4
23°F (–5°C)
27°F (–3°C)
-3
25°F (–4°C)
28.5°F (–2°C)
-2
27°F (–3°C)
30°F (–1°C)
-1
28.5°F (–2°C)
32°F (0°C)
0
30°F (–1°C)
34°F (+1°C)
1
32°F (0°C)
36°F (+2°C)
2
to
15
34°F (+1°C)
to
57 F (+14°C)
27°F (+3°C)
to
61°F (+16°C)
Coding Level 2
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
Possible change
“Frost protection”
a4:0
With frost protection
a4:1
No frost protection;
this setting is only possible if code a3:9
has been selected.
Note:
“Important” also coding address
“a3”.
“Heating circuit pump logic function (economy control)”
a5:5
With heating circuit pump logic function
(economy control):
heating circuit pump OFF when the
outdoor temperature (OT) is 2°F (1 K)
higher than the set room temperature
(RTset) OT > RTset 2°F (1 K).
a5:0
Without heating circuit pump logic
function.
a5:1
to
a5:15
With heating circuit pump logic
function: Heating circuit pump OFF,
see the following table.
Coding address
a5:...
With heating circuit pump logic function: Heating circuit pump “OFF”
1
OT > RTset 9°F (+ 5 K)
2
OT > RTset 7°F (+ 4 K)
3
OT > RTset 5°F (+ 3 K)
4
OT > RTset 4°F (+ 2 K)
5
OT > RTset 2°F (+ 1 K)
6
OT > RTset
7
to
15
OT > RTset 2°F (– 1 K)
OT > RTset 16°F (– 9 K)
