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ENGLISH
Clogging of fi lter controlled by a pressure regulator installed and wired up to the controller.
Pressure switches
The adjustments are as follows:
Size
DP1
48
400Pa
88
400Pa
120
450Pa
If a second presure switch is fi tted,
refer to setting values § "5.2
Connection of accessories", page 10
10.4 Casing maintenance
To facilitate maintenance, the plug fan can be extracted from the unit:
• Disassemble the access lid.
• Disconnect the quick connector from the motor wiring.
• Clean with compressed air or soapy water.
• Do not use ammonium detergents.
• Re-assemble the unit and return the connector to its place.
10.5 Maintenance/replacement of the fan
After a long period of use, dust may deposit on the fan; therefore, dust removal operations are necessary.
To extract the fan:
• Cut the electric power supply at the primary circuit-breaker.
• Open the access doors.
• Disconnect the power and control plug connectors on the side.
• Disconnect the pressure sensor.
• Unscrew the two M8 screws using a Ø13 spanner of the plate sup-
port.
• Remove the fan.
• Clean the fan using a damp cloth - do not hose the fan.
• Put it back in place by reversing the disassembly procedure.
10.6 Maintenance/replacement of the electric heater
Overheat control
Thermostat
with automatic
resetting
Thermostat
with manual
resetting