Installation Recommendations - Honeywell SDC Service Manual

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
Ω
°C
-50.0 1659706
-49.0 1541379
-48.0 1432919
-47.0 1332091
-46.0 1238358
-45.0 1153525
-44.0 1073429
-43.0 999894
-42.0 932327
-41.0 869327
-40.0 814000
-39.0 759391
-38.0 708806
EN2H-0221GE51 R0812

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).^
Ω
°C
-9.0 115575
-8.0 109189
-7.0 103194
-6.0 97564
-5.0 92274
-4.0 87303
-3.0 82628
-2.0 78232
-1.0 74094
0.0 70200
1.0 66515
2.0 63046
3.0 59777
Ω
°C °C
31.0 15180
32.0 14511
33.0 13875
34.0 13270
35.0 12695
36.0 12148
37.0 11627
38.0 11131
39.0 10659
40.0 10210
41.0 9781
42.0 9373
43.0 8983
Ω
°C
71.0 2989 111.0
72.0 2882 112.0
73.0 2779 113.0
74.0 2681 114.0
75.0 2587 115.0
76.0 2496 116.0
77.0 2409 117.0
78.0 2325 118.0
79.0 2245 119.0
80.0 2168 120.0
81.0 2094 121.0
82.0 2022 122.0
83.0 1954 123.0
Technical data
Ω
793.7
770.3
747.7
725.8
704.7
684.2
664.5
645.3
626.9
609.0
591.7
575.0
558.8
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