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External probe (optional)
Connect the probe to its respective terminals. The maximum permissible length for the boiler - external probe connec-
tion electrical cable is 50 m. A normal 2-wire cable can be used. The external probe should preferably be installed on
the North, North-West wall or that facing the largest area of living room. The probe must never be exposed to the early
morning sun or, insofar as possible, direct sunlight; protect it if necessary. In any case, the probe must not be installed
near windows, doors, ventilation openings, flues or heat sources that could affect the reading.
Accessing the electrical terminal block
The electrical terminal block is located inside a sealed box at the bottom left of the cabinet. Make the electrical connec-
tions as shown in the wiring diagram on sec. 46 and run the cables through the special cable glands.
301
300
302
299
42
DHW temperature sensor (not supplied)
72
Room thermostat (not supplied)
95
Diverter valve (not supplied)
130 DHW circulating pump (not supplied)
138 External probe (not supplied)
139 Remote timer control (not supplied)
298 Cascade temperature sensor (not supplied)
20
ECONCEPT 51/51i - 101/101i
fig. 26 - External probe positioning not recommended
130
95
72
138
298
72B
42
139
fig. 27 - Electrical terminal block
cod. 3540N680 - 06/2008 (Rev. 00)
299 Input 0-10 Vdc
300 Burner lit contact (voltage-free contact)
301 Fault contact (voltage-free contact)
302 Remote reset input (230 Volt)
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