3
Emergency stops must be installed in
compliance with current rules and
legislation.
4.3.1 Access to terminal box
•
Unscrew the four screws of the
plate cover (1, fig. 6).
•
Remove, turn, and fixate the cover
(2, fig. 6). Keep the terminal box
attached to the plate cover.
5. Start of operation
The fans are designed for
continuous operation. The
below kinds of operation may cause
fatigue breaks in the impellers and
endanger people.
•
Operation in stall area, i.e. with
counter pressure that pulsates -
called pump mode
•
Operation with uninterrupted and
repeated starts and stops
•
Uneven flow velocity through the
fans
Ask Novenco if in doubt.
5.1 Approval for operation
When the jet fans have been mounted
and are serviceable their function,
correct installation, and interaction must
be established through an approval test.
The person responsible for the operation
of the system must take initiative for this
test
The approval test must be documented
and kept by the person responsible for
the operation of the system and must be
presented on demand if it concerns jet
fans approved for smoke control.
Before start-up, check that the fans are
clean and free from tools and foreign
substances and that the impellers rotate
freely.
Check also that the electrical connection
complies with current regulations and
that the wire guard of the inlet nozzles
and the deflector in the outlet are
installed properly.
The fan rotation direction is checked
after a brief start. Refer to the arrow signs
on the side of the fan.
Note, that during the first 30 minutes of
operation the motor may consume more
power than stated on the motor plate.
Also, the current consumption depends
on the temperature.
5.2 Start procedure
Start procedure
1 Start the fan
2 Check for irregular sounds
3 Check after 30 minutes that the fan
functions correctly.
6. Maintenance
The user must always keep the jet fans in
good working order.
To ensure functionality and life of the
fans the following must be observed.
Shut off and disconnect the fan
power supply before beginning
any work or cleaning on the
fans.
6.1 Safety measures
Ensure that unintentional activation is
impossible. Cut, for instance, the power
in the fuse box or use another centrally
placed power switch. Fans with
automatic control may suddenly start
unless the power supply is disconnected.
6.2 Maintenance of fans
6.2.1 CO-fans
For fans used for CO-ventilation yearly
inspection and check of functionality is
recommended.
6.2.2 Smoke control fans
Fans approved for smoke control and
used for ventilation on a daily basis,
must be inspected every six months.
Fans that are only used in case of fire
must be inspected four times per year.
It is important to comply with the motor
supplier's guidelines for maintenance.
6.3 Cleaning
Clean the cabinet, outlet, motor, inlet and
wire guard with a wet cloth. A vacuum
cleaner fitted with a brush or pressurised
air may also be useful, depending on the
kind of filth that have settled on the fan
unit.
The motor and inlet areas require
removal of the motor and fan wheel
arrangement. Remove the motor to clean
the inlet nozzle. It is recommended to
leave the wire guard on the inlet nozzle,
as it is riveted to the nozzle. See section
.
Do not use high-pressure water
cleaning.
for
reassembly instructions.
Figure 4.
Circuit diagram in motor
terminal box
Figure 5.
Connections in terminal box
Figure 6.
Access to terminal box
Tw
o speed
(Dahlander)
Max. r/min
Min. r/min
Low speed
High speed
Earth
L1 L2 L3
L1 L2 L3
1
2
