38
Instructions for the installer
Internal connections
DK : ..............low water pressure swich
SR1-SR2 : .........CH NTC probe 10k Ohm at 25°C B=3435 (double)
TF : ...............ue gas thermostat
VG : ..............gas valve
P : ................boiler pump
PWM : ............PMW signal cable for circulation pump
FL : ...............ow switch
SS : ...............NTC DHW probe 10k Ohm at 25 °C B=3435
E : ................ignition/ame detection electrode
CN_A-CN_M : .....Load/signal connectors
X2-X7 : ...........ground connectors
MDV : ............electric deviating valve
Connections performed by the installer
1-2: ...............room thermostat (TA)
3-4: ...............Remote Control
5-6: ...............NTC external probe 10k Ohm at 25 °C B=3977 (SEXT)
7-8: ...............not used
9-10-11: ..........Programmable relay (230 Vac 5A cos=1|)
9: ................phase (NO)
10: ...............phase (NC)
11: ...............neutral (COMMON)
15-16: ............not used
17-18: ............not used
3.16.1 Relationship between temperature and nominal resistance of all NTC probes
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. 7 Relationship between "Temperature and Nominal resistance" for temperature probes
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