Exodraft EBC22, Instructions Manual

Page: 37 / 48

UK | 37
3112015_EBC22_UK
The installation of the supply cable must be carried out in
accordance with applicable regulations and legislation.
The earth terminal ( ) must always be connected.
When connecting pressure transducer (XTP) and frequency converter, screened cable must be used.
The following sample wiring diagram shows how to connect the EBC22 to a frequency converter/MPR
relay. Exodraft recommends that you contact the boiler manufacturer for details of correct connection
of the boiler control system.
ATTENTION! This work must be performed by a qualified electrical engineer,
in accordance with locally applicable rules and legislation.
Exodraft stresses that in accordance with EU’s Machinery Directive an isolation switch must be set up
in the fixed installation. The isolation switch is not supplied by Exodraft. Available as an extra.
Pressure-controlled regulation of Exodraft supply air fan
Use
General
• The EBC22 can be used to control an Exodraft BESB or BESF box fan.
• The EBC22 can control a supply air fan directly or indirectly via a frequency converter.
Positioning
Fit the EBC22 and pressure transducer (XTP) in the boiler room as described on page 13
Method of operation
General function
• The control system monitors the pressure in the boiler room and disconnects the burner in the event of
errors (the alarmdiode on the EBC22 will turn on).
• When the pressure in the boiler room changes, the EBC22 will change the fan speed in order to meet
the setpoint pressure for the boiler room.
• The EBC22 is linked to the boiler system in such a way that when a heating requirement arises,
the EBC22 will start the fan and delay the start of the boiler until the pressure in the boiler room is
sufficient.
• A safety function ensures that if the pressure in the boiler room is insufficient, the EBC22 will shut
down the boilers.
Electrical connection
Isolation switch
Sample wiring diagram