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7 - START-UP
Check that the cartridges containing the carbon are correctly
inserted and check the operation of the air seal gasket.
Upon request, a differential pressure gauge can be supplied to
fit to the pre-filter, bag filter and absolute filter sections.
A differential pressure switch, visual or audible, can also be
supplied for the same purpose.
The rotary filter is supplied as standard with a differential
pressure switch.
Remove any safety locking devices from the fan assembly,
leaving the shock absorbers in operation.
Check the alignment of the pulley and the tension of the belts
(see "Maintenance").
Check the correct direction of rotation of the fan, in reference
to the arrow applied.
Check that the operation of the fan assembly is free of
vibrations. If not, carefully check the assembly.
Check that, after the first hour of operation, the temperature of
the fan supports does not exceed 60°C.
Measure the effective power input of the motor and compare it
against the rated value. If the input of the motor is too high,
above the rating, or alternatively is less than envisaged, check
the pressure drops in the system circuits.
High power inputs indicate, especially for fans with forward
blades, an excessive volume of air due to lower resistance in
the circuit, and thus the overloading of the electric motor.
Vice-versa, low input indicates poor air flow due to higher
pressure drops than envisaged.
To normalise the system, adjust the transmission to vary the
speed of the fan. In no circumstances, in fact, are such
problems due to the fans, as these are built in series,
extensively tested, and their typical curves are to be
considered accurate (except for the max. deviation of 5%, as
declared by the manufacturer). The precise calculation of the
pressure drops in the entire circuit is thus essential, so as to
prevent the above problems.
START-UP REPORT
To detect the objective operational conditions is useful to
control the unit over time.
With the unit running, meaning in stable conditions and near
the work ones, detect the following data:
Overall absorptions and voltages with unit in full load
Absorptions of the various electric loads
Temperatures and flow rates of the various fluids
(water, air) at input and output of the unit
The detections must be kept and made available during
maintenance interventions.
Check the air and water temperatures are within the operatio-
nal limits.
Start the unit; refer to the "Adjustment" section for indications
on the control system.
With the unit running, meaning in stable conditions and near
the work ones, check:
power supply voltage
unit overall absorption
absorption of the individual electric loads.
VOLTAGES
ACTIVATED CARBON FILTERS
DIRTY FILTER DETECTION DEVICE
FAN
