Air Filters; Heaters; Coolers - Carrier AiroVision 39 HQ Assembly/Installation, Commissioning, Maintenance Manual

10.9. Air Filters

Check if the correct filters have been installed.
Check if filters are installed correctly.
HEPA filters are supplied separately to prevent foul-
ing during transport and start-up. Insert HEPA filters
only after cleaning the unit.
Set dirty filter pressure switch or filter indicators, if
available.
Close the door of filter cell.
For further details about filter installation, see Appen-
dix-2.
For number of filters used or to be replaced, see Ap-
pendix-3.

10.10. Heaters

10.10.1. General
- Check the connections in accordance with the di-
mensional drawing.
- Check the connections for leakage and sealing.
- Make sure heater can supply enough heat to pre-
vent frost formation once fan is started.
Caution: For coils which water is used as heat-
ing or cooling medium (refrigerant), coils must
be drained completely for preventing any possi-
ble damages on the coils when the temperature
drops below 0°C.
10.10.2. Electric Heaters
- Make sure heater has been connected in accord-
ance with supplier instructions. Wiring diagram is
located inside the electric connection box.
- Check the current of electric heater.
- Check whether safety devices shown in wiring dia-
gram are installed.
- Check whether heater is earthed in accordance
with local instructions.
- Electric heater may only be switched on if speci-
fied minimum air flow is provided.
- Electric heater should be switched off at least 5
minutes before air handling unit is turned off.
- Make sure no foreign objects are left in electric
heater section.
- The following warnings are attached to the panel:
electric voltage and hot surface.
10.10.3. Steam Coil
Steam coil surface temperature exceeds 100°C.
Steam supply should be checked by authorized per-
sonnel.
- Steam coil may only be switched on if specified
minimum air flow is provided.
- Make sure no foreign objects are left in steam coil
section.
- Steam coil should be closed at least 5 minutes be-
fore air handling unit is turned off.
- The following warning is attached to the panel: hot
surface

10.11. Coolers

- Check the connections in accordance with the di-
mensional drawing.
- Check the connections for leaks.
- Check drain siphon. If Alarko Carrier standard dis-
charge siphon is used, check whether has been
correctly installed. Check whether siphon cap and
ball are installed correctly.
- Comb the coil fins which were bended during
transport
- Check whether droplet eliminator pack after the
cooler has been correctly installed.
- Material to block water flow should not be placed
inside the ceiling.
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