KOJA 0603, Instruction For Operation And Maintenance

Page: 43 / 52

AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Fan section, FFTS and FFTK
2017-02-13 V. 2.0 43
13.3. Safety
WARNING
Before switching on the fan, make sure that the inlet and outlet of the fan section have
been connected to the ductwork or that the access to the rotating fan parts, such as
the impeller or drive, through an inlet, outlet or access door has been prevented with
protective screens or other appropriate manner.
WARNING
Upon starting the unit, the service switch of the unit must be installed and operating and
the access doors closed.
WARNING
The damper section of the unit must open before the fan starts.
WARNING
The FFTS fan casing is pressurized. Make sure that the fan has stopped before you open the
access door!
WARNING
Do not open the access doors of the unit when the fan is in operation. If the unit is installed
in a place where it is easily accessible to persons other than service personnel, the handles
of the access doors must be removed and locked in a safe place.
13.4. Safety equipment
CAUTION
The service (safety) switch installed in the fan section also functions as a unit emergency
switch (accessory).
CAUTION
When possible, use safety protective gloves when handling lubricants. Regular exposure to
paraffin products may cause allergic reactions.
13.5. Commissioning
• Make sure that the inside of the fan section and the fan are free from loose parts, debris, etc. that
could get between the belts or the impeller.
• Make sure that the flexible joint and the vibration dampers are intact and that the fan and motor are
supported by the vibration dampers only and that they move freely by hand.
• Check that the electrical cables are intact and routed to the motor flexibly and so that they cannot
come into contact with rotating parts, and that the type of the cable is correct.
• Check that the drive and fan operate freely by turning the impeller a couple of turns by hand.
• Start the fan for a moment and check that the rotation direction corresponds with the arrow on the
fan. Note! Be very careful when doing this, and make sure that there are no people or loose objects
near the fan or the drive. Before starting the fan, make sure that the access door of the fan is closed.
• All filters, louvres, valves and other parts of the air-conditioning plant must be installed and preset
before long-term operation. The fan must not be started with the inlet, outlet and fire dampers closed.
• The units must not be started before ensuring that the ducts are clean and that there are no loose
objects in the ductwork.
• If necessary, clean the fan casing and impeller with a brush, vacuum cleaner or damp cloth. If the unit
is equipped with drainage for washing water, the casing can be washed with extra care using water.
Note! Make sure that the washing water drainage plugs are removed for the duration of the wash.