SDC / DHC
Technical data
EN2H-0221GE51 R0808
251
8.1.1 Installation
recommendations
Mains voltage lines
(mains connection, burners, pumps, servo motors):
Diameter 1.5
mm
2
Max. permissible length
No limit for installation in buildings.
Safety low-voltage lines
(sensors, ext. switches upon demand via switching contact, modem connection lines, analog
signal lines etc.)
Diameter 0.5
mm
2
Max. permissible length
100 m (looped circuit); longer connection lines should be avoided
to prevent the risk of interference
Data bus lines
Diameter 0.6
mm
2
Max. permissible length
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.
Recommended layouts
J-Y(St)Y 2 x 0.6
8.2 Sensor resistance values
8.2.1 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
k
Ω
°C
k
Ω
°C
k
Ω
°C
k
Ω
–20 220.6
0
70.20
20 25.34
70 3.100
–18 195.4
2
63.04
25 20.00
75 2.587
–16 173.5
4
56.69
30 15.88
80 2.168
–14 154.2
6
51.05
35 12.69
85 1.824
–12 137.3
8
46.03
40 10.21
90 1.542
–10 122.4
10 41.56
45 8.258
95 1.308
–8 109.2
12 37.55
50 6.718
100 1.114
–6 97.56
14 33.97
55 5.495
– –
–4 87.30
16 30.77
60 4.518
– –
–2 78.23
18 27.90
65 3.734
– –
