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11.3 MANAGEMENT OF 0-10V INPUT
The functions with the 0..10V regulator are activated by means of their parameters. When the function is enabled (P82=3) and
P78=1, the input manages the heating setpoint temperature directly; when the P78=2, the input manages the heating power input
directly. Demand is activated above 3V and the heating setpoint is calculated in proportion to deviation from 3 to 10V DC to give
a setpoint that goes from minimum to maximum.
0-10V DC Electrical signal input
(V)
0...3
3
4
5
6
7
8
9
10
WARNING
Maximum permitted input voltage 11V +/- 2%
11.4 ACCESSORIES
11.4.1 OUTDOOR TEMPERATURE SENSOR
To connect this accessory, see figure to side (terminals 4-5)
and the instructions supplied with the sensor.
SETTING THE "Kt" CLIMATE CURVE
When the external sensor is connected to the boiler, the
electronic board adjusts the flow temperature calculated
according to the set Kt coefficient. Select the required curve by
pressing
as indicated in the chart below for selecting
the most appropriate one (00 to 90).
Flow temp
(°C)
90-80 70
60
50
40
30
85
80
75
70
65
60
55
50
45
40
35
30
20
15
10
5
0
-5
-10
NOTE:
For temperatures below -40 °F (-40 °C), the maximum heating flow temperature set point no longer increases and the curves
shown on the graph become horizontal.
P78 = 1
Heating flow setpoint temperature
(°F)
77
95
108
124
140
154
167
176
Outside temp
20
10
00
-15
-20
-25
-30
-35
-40
-45
-50
-55
P78 = 2
Central Heating - Heat input (Gross)
(°C)
(kW)
OFF
25
4.9
35
8.4
42
12.0
51
15.4
60
18.5
68
22.2
75
25.3
80
27.4
SIEMENS
QAC34
1
2
(°F)
90-80 70
60
50
40
186
176
166
156
146
136
126
116
106
96
86
(°C)
-60
68
60
52
44
36
28
20
27
(Btu/h)
16,650
28,900
40,800
52,400
63,050
75,650
86,200
93,550
M2
3
4
5
6
7
8
9
10
30
20
10
00
12
4
-4
-12
-20
-28
-36
-44
-52
7703473 (02-12/19)
CG_2394
-60
-68
-76
(°F)
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