Electric Steam Humidifier; Water Spray Humidifier; Fan; Sound Attenuator - Carrier AiroVision 39 HQ Assembly/Installation, Commissioning, Maintenance Manual

- Check general fixing status of steam generator.
- Check steam supply and drain pipes.
- If humidification sections have negative pressure,
install a siphon at humidifier cell.
- Steam humidifier device should be closed at least
2 minutes before air handling unit is turned off.
- Check the voltage and measure the circuit cur-
rent.
- Connect the humidifier according to supplier rec-
ommendations.
- The following warning is attached to the panel: hot
surface.

10.16. Water spray humidifier

Check supplier instructions.

10.17. Fan

- Remove Z-profiles. Location of Z-profiles are
shown on the label attached to the door. (Fig. 57)
- For hygienic air handling units, when starting-up
the fans, reinstall the screws removed from Z-pro-
files after Z-profiles are dismantled.
- For fan motor couplings using Al profile, remove
the square nut after Z-profile is dismantled.
- Check whether terminal connection is on the pul-
ley side. If required, turn terminal connection be-
fore connecting the wires.
Check whether fan can move freely without touching
the frame, flexible connection or wiring. Check mains
voltage of electric motor. Check and/or connect the
motor in accordance to local regulations and supplier
instructions.
Check the rotation direction of the fan. The direction
is indicated on housing by an arrow. Measure current
draw for all phases of electric motor. Current draw
for all phases should be nearly the same and corre-
sponding to data on unit nameplate. Set motor pro-
tection mechanism to its nominal value. Type of the
belt used, belt tension and number of belts and their
dimensions are indicated on the label attached to fan
housing together with information on pulley the belt is
connected on.
remove after transport
Fig. 57. Fan Z-fixing
Caution: Air flow can lead moving of stationary
parts (even if fan is switched off).
Check whether flexible connections are correctly
installed. To have control over belt ruptures, check
pressure switch, if available and adjust to correct
pressure. Check the operation main switch. Warn-
ing: While working on the fan make sure power is off.
Warning regarding rotating parts, electric voltage and
open doors are attached to the door. Label for remov-
ing Z-profiles is attached to floor of fan section.

10.18. Sound attenuator

- Check attenuators for damage.

10.19. Lighting

- Check connection voltage.
- Check whether switch is operating. Switch should
be installed in accordance to local regulations.
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