Table of Contents
SDC / DHC
8.1.1
Mains voltage lines
(mains connection, burners, pumps, servo motors):
Diameter
Max. permissible length
Safety low-voltage lines
(sensors, ext. switches upon demand via switching contact, modem connection lines, analog
signal lines etc.)
Diameter
Max. permissible length
Data bus lines
Diameter
Max. permissible length
Recommended layouts
8.2.1
°C
kΩ
–20
220.6
–18
195.4
–16
173.5
–14
154.2
–12
137.3
–10
122.4
–8
109.2
–6
97.56
–4
87.30
–2
78.23
EN2H-0221GE51 R0808
Installation recommendations
2
1.5 mm
No limit for installation in buildings.
2
0.5 mm
100 m (looped circuit); longer connection lines should be avoided
to prevent the risk of interference
2
0.6 mm
50 m (looped circuit, longest distance between a central device
and a device to be supplied); longer connection lines should be
avoided to prevent the risk of interference.
J-Y(St)Y 2 x 0.6
8.2
Sensor resistance values
NTC 20
For outside sensor (OT), heat generator sensor (BLRS/BS), tank
sensor (DHWS), mixed heating circuit 1 flow sensor (VF1), mixed
heating circuit 2 flow sensor (VF2), variable input 1 (VI-1) (setting
not for exhaust gas sensor), variable input 2 (VI-2), variable input 3
(VI-3), collector tank/buffer sensor (SBUS).
°C
kΩ
0
70.20
2
63.04
4
56.69
6
51.05
8
46.03
10
41.56
12
37.55
14
33.97
16
30.77
18
27.90
°C
kΩ
20
25.34
25
20.00
30
15.88
35
12.69
40
10.21
45
8.258
50
6.718
55
5.495
60
4.518
65
3.734
Technical data
°C
kΩ
70
3.100
75
2.587
80
2.168
85
1.824
90
1.542
95
1.308
100
1.114
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