Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 94

Coding
Coding 2
(continued)
Heating
Frost protection temperature
A3:2 Outdoor temperature below 34°F
(1°C):
Frost protection function "On"
Outdoor temperature above 37°F
(3°C):
Frost protection function "Off"
Parameter address "A3"
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2 to 15
Heating
Coding in the factory set condition
Frost protection activation
A4:0 The frost protection function is activated. Start
and stop temperatures of the function
can be adjusted (code "A3", heating group). Frost
protection function: The heating circuit pump is
switched on at the relevant outdoor temperature;
a minimum supply temperature of 50°F (10°C) is
specified. At the relevant outdoor temperature, it
is automatically switched off.
Room sensor offset
E2:50 Is available if code "A0:1" or "A0:2", heating
group, is set. No correction of actual room
temperature
Slab curing
F1:0 Slab curing disabled
Do not adjust!
94
A3:-9
to
A3:15
IMPORTANT
If the frost protection temperature is set to less than 1°C
outdoor temperature, uninsulated pipes may freeze.
There is a particular risk for outdoor pipes and in standby
mode, e.g. during holidays. Provide pipes with thermal
insulation and avoid unsupervised standby mode.
Frost protection function / heating
circuit pump "On"
14°F (-10°C)
15.8°F (-9°C)
17.6°F (-8°C)
19.4°F (-7°C)
21.2°F (-6°C)
23°F (-5°C)
24.8°F (-4°C)
26.6°F (-3°C)
28.4°F (-2°C)
32.2°F (-1°C)
32°F (0°C)
33.8 to 57.2°F
(1 to 14°C)
Vitoligno 300-C Installation/Service
Frost protection function "On"/"Off";
see the following table
Frost protection function / heating
circuit pump "Off"
17.6°F (-8°C)
19.4°F (-7°C)
21.2°F (-6°C)
23°F (-5°C)
24.8°F (-4°C)
26.6°F (-3°C)
28.4°F (-2°C)
32.2°F (-1°C)
32°F (0°C)
33.8°F (1°C)
35.6°F (2°C)
37.4 to 60.8°F
(3 to 16°C)
Possible change
A4:1 The frost protection function is
disabled.
Adjustment only possible if code
"A3:−9" has been set.
Note: Observe the note for code "A3".
E2:0 Correction - 5 K to display correction
to - 0.1 K
E2:49
E2:51 Display correction + 0.1 K to display
to correction + 4.9 K
E2:99
F1:1
to
F1:6
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