Maintenance And Operating Instructions; General; Casing Panels; Inside Installation - Carrier AiroVision 39 HQ Installation, Operation And Maintenance Instructions

12. MAINTENANCE AND OPERATING INSTRUCTIONS

12.1. General

The AHU(s) require little maintenance. The smooth
inside and outside finish of the panels makes main-
tenance very simple.
For dry sections: once a year thoroughly check the in-
sideand outside of the AHU casing. For maintenance
of wet sections (coolers and humidifiers) please refer
to the airhandling section concerned.
12.2

. Casing Panels

12.2.1. Inside Installation

a) Internal inspection of the casing of double-skin
panel sand of all dry parts.
Remove contamination with water and a mild house-
hold soap solution. Where damage of the paint finish
has occurred, if necessary remove rust and touch up
with good quality anti-corrosive primer and paint. The
outside air intake sections can show signs of corrosion
as they contain wet parts and are affected by mist,
rain and air pollutants.
b) Outside inspection of the coating.
If damage to the paint treatment has occurred, remove
the rust (if necessary), and touch up with good quality
anti-corrosive primer and paint.

12.2.2. Outside Installation

Check the sealed joints ofAHUs installed outside and
if required seal again with a UV-resistant and paint-
able kit.Treat damage as for inside installation.

12.3. Doors and Access Covers

Check locks and hinges ofall doors and access cov-
ers. For outside installation check the storm cord.

12.4. Flexible Connections

Check the flexible connections for damage.

12.5. Earthing

Ensure that the unit is earthed and installed in the
correct manner.

12.6. Dampers

All damper hinges are equipped with plastic bearing-
bushings, so that no lubrication is required. Remove
excess contamination by cleaning it with compressed
air. Clean aluminium parts with water and a mild
household soap solution. Check adjusting bolts and
linkage and if necessary tighten. Ensure that the
damper blades run free of the casing and do not touch
the flexible connection.

12.7. Outside Air Intake

Especially the outside air intake is contaminated
by pollution taken in with the air. The maintenance
interval must be observed, as irreparable damage of
the panels might otherwise occur. Clean the outside
air intake well and repair damage as described in
point 10.2.1.

12.8. Filters

The filters must be inspected once a month for excess
pollution, pressure loss, damage and seating of the
slide-in filters or built-in frames. With slide-in filters
ensure that the filters have been correctly positioned
and have been pushed well against each other from
below. When replacing built-in filters you must ensure
that the filter has been pushed well against the seal-
ant and that the clips have been correctly installed.
Filters must be replaced at the required intervals.
The timing of the replacement depends on the type
of filter, quality and the degree of contamination of
the air. The pressure loss across the contaminated
filter can be measured with a pressure differential
gauge. Maintenance instructions of special filters are
available on request.

12.9. Heaters

12.9.1. Water, Glycol and Steam Heat Exchangers

Check the air intake once a year for contamination,
and if necessary clean with compressed air against
the direction of the air flow or clean the air intake
with a vacuum cleaner. Check for leakage. Check
the operation of the frost protection thermostat and
check the correct control sequence when the the-
mostat trips. Glycol-charged heat exchangers must
be checked annually for the actual percentage of
glycol in the water. The following warning pictogram
is located on the panel of the steam heat exchanger:
hot surface.
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