54
Instructions for the installer
Internal connections
P: . . . . . . . . . . . . . . . . . boiler pump
V:. . . . . . . . . . . . . . . . . brushless fan
VG: . . . . . . . . . . . . . . . gas valve
MDV: . . . . . . . . . . . . . electric deviating valve
DK: . . . . . . . . . . . . . . . low water pressure swich
TS: . . . . . . . . . . . . . . . heating flow safety thermostat
FT: . . . . . . . . . . . . . . . flue gas thermostat
APS: . . . . . . . . . . . . . . air pressure switch
SR: . . . . . . . . . . . . . . . return NTC temperature probe 10k Ohm a 25°C B=3435
SM: . . . . . . . . . . . . . . . CH NTC temperature probe 10k Ohm a 25°C B=3435
PWM P: . . . . . . . . . . . PMW signal cable for circulation pump
PWM V: . . . . . . . . . . . PMW signal cable for fan
E: . . . . . . . . . . . . . . . . . ignition/flame detection electrode
Connections performed by the installer
1-2: . . . . . . . . . . . . . . . NTC external probe 10k Ohm at 25 °C B=3977 or ambient NTC probe 10k Ohm at 25°C B=3977 (SEXT/SAMB)
3-4: . . . . . . . . . . . . . . . room thermostat or Remote Control (TA-CR)
5-6: . . . . . . . . . . . . . . . not used
7-8: . . . . . . . . . . . . . . . not used
9-10: . . . . . . . . . . . . . water heater probe (SB)
11-12: . . . . . . . . . . . . water heater thermostat (TB)
3.20.1 Relationship between temperature and nominal resistance of all NTC probes (B=3435)
T (°C)
0
2
4
6
8
0
27203
24979
22959
21122
19451
10
17928
16539
15271
14113
13054
20
12084
11196
10382
9634
8948
30
8317
7736
7202
6709
6254
40
5835
5448
5090
4758
4452
50
4168
3904
3660
3433
3222
60
3026
2844
2674
2516
2369
70
2232
2104
1984
1872
1767
80
1670
1578
1492
1412
1336
90
1266
1199
1137
1079
1023
Tab. 12 Relationship between "Temperature and Nominal resistance" for temperature probes
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