3001434-2006-09-01.fm
3/12
1
Product information
EBC12 (fig. 1) is an automatic control unit with con-
stant pressure regulation of EXHAUSTO chimney
fans. EBC12 is used for multiple systems and for boil-
ers with a modulating burner. The automatic controls
the chimney draught and cut out the boilers in case of
a fault. The automatic control unit is used for both
atmospheric gas boilers and for boilers with a forced
draught burner for oil and gas.
Function
When the boiler thermostat calls for heat, the chim-
ney fan starts at full voltage. When the faile-safe
supervision confirms sufficient chimney draught, the
burner is released and the voltage to the chimney fan
is regulated to match the draught selected (the value
can be read from the display by pushing a button, fig.
1-B).
If the draught is in adequate for more than 12 se-
conds, the burner will cut out. Inadequate draught
means that the pressure is less than 64% of the
selected value, corresponding less than 80% flow.
When the boiler cuts out, the chimney fan stops, too.
However, it is possible to select a 3-minute post-run
period by means of the POST PURGE dipswitch (fig.
1-H). Alternatively, the controls can be wired so the
chimney fan run continuously.
All in- and outputs have an LED for fail-safe supervi-
sion and servicing the system (fig. 1-I).
Additional function
The controls have two extra safety functions which
can be selected on the dipswitch (fig. 1-H), where this
is prescribed by local regulations
•
MANUAL RESET after power failure and
draught fault.
•
PDS-CHECK, only used for extra fail-safe func-
tion (pressure differential switch/PDS).
•
EBC12 has a 0-10V output signal for controlling
several chimney fans via a frequency converter
or a motor power relay.
Accessories
EBC12 comes with a pressure transducer (XTP-sen-
sor), a tube and a probe.
Fig. 1A: Fuse holder
Fig. 1B: Setpoint button
Fig. 1C: Reset button
Fig. 1D: Potentiometer for adjusting the setpoint
Fig. 1E: Display showing the current under pressure
or setpoint
Fig. 1F: Alarm LED (red)
Fig. 1G: Up/down regulation LEDs (yellow)
Fig. 1H: Dipswitch block
Fig. 1I:
ON/OFF LEDs (green)
1
