4.
Turn the rotor manually to check that it moves
freely.
The clearance between the rotor and the bell-
mouth inlet may have changed due to vibra-
tions during transport. Check before commis-
sioning that the distance between the inner
edge of the rotor and the outer surface of the
bellmouth inlet is the same everywhere.
5.
Tighten all fixing screws.
6.
Check the bearings and relubricate them if neces-
sary.
7.
Make sure that the multileaf dampers are open,
‘Setting up multileaf dampers’ on page 61
.
8.
Check the direction of rotation of the fan by
switching on the motor for a moment.
Nominal motor power of 3 kW and higher: star
delta start.
In units with a fan with asynchronous motor,
the arrow indicating the direction of rotation
can be found on the fan casing.
In units with an EC fan, the fan will automati-
cally start in the correct direction of rotation.
9.
You can change the direction of rotation by swap-
ping the terminal connections.
10.
Ensure that the unit has been correctly earthed.
11.
Close all inspection access doors on the air han-
dling unit
Ä
Operating manual.
12.
Measure the power consumption with the inspec-
tion access doors closed and compare it with the
nominal current.
If the power consumption exceeds the value
given on the motor rating plate, switch off the
fan immediately.
13.
Check the function of the anti-vibration elements.
14.
Moving towards the operating point, check
whether the fan is running smoothly and with min-
imal vibration only.
If you can see or hear the fan vibrating, switch
off the air handling unit,
15.
Measure the volume flow rate.
ð
The centrifugal fan has been set up.
6.3.3
Filter
Filters, inserting
Personnel:
HVAC technician
Protective equipment:
Industrial safety helmet
Protective clothing
Protective gloves
Safety shoes
–
Filters may become contaminated due to con-
struction work in the building which is why we
recommend that you replace all filters after the
construction phase and initial commissioning.
–
Do not operate the air handling unit without a
filter.
–
One spare filter element should always be avail-
able so that the air handling unit does not have
to be switched off. Store filters in a dry place,
free from dust, so that they will not be contami-
nated or damaged. Do not use filters beyond the
use before date. Original TROX filters carry a
sticker on the frame with both the use before
date and information on how to order replace-
ments.
1.
Ensure that the filters are intact.
Defective filters may become torn while in use
and will then no longer be effective.
2.
Remove any dust from all parts that are in
upstream direction before the filter.
Clean the air handling unit and ventilation
ducts before you install any filter of class F9 or
higher.
Initial commissioning
Setting up and adjusting AHU casing units > Filter
Air handling unit X-CUBE
58
