Carrier AiroVision 39 HQ, Сборка/монтаж, пусконаладка, руководство по обслуживанию

Страница: 35 / 52

35
12.16. Sound attenuator
Under normal conditions, attenuators are mainte-
nance free. Nevertheless it is recommended to check
attenuators once a year for possible damage and
loose fibre elements, in order to prevent further con-
tamination of the system.
12.17 INSTRUCTIONS FOR HYGIENIC
AHU’s
The information in this application pages is provid-
ed as a guideline for the cleaning and maintenance
technicians. Please also refer to other parts of the
mounting, installation operation and maintenance in-
structions.
Storage
Hygienic air handling units must be stored and in-
stalled indoors, never outdoors.
Hygienic air handling units must be stored indoors,
never outdoors.
Dust-free, clean and dry conditions must be ensured
during storage (on boards, if necessary, with the com-
ponents being covered by water-resistant covering).
Prior to installation, components shall be checked for
coarse contamination and any such contamination
found shall be removed.
Do not unwrap the hygienic air handling units out-
doors or in a dirty environment.
General
Only competent personnel under a qualified supervi-
sor must carry out maintenance, repairs cleaning or
modifications.
The elements of the air handling unit are accessible
upstream and downstream for cleaning purpose, but
it is recomended to have them easily and safely re-
movable; this shall be taken into account when mak-
ing modifications on the fittings for pipes and ducts.
Do not open any access panels or touch electrical
components while voltage is applied unless it is nec-
essary for measurements, tests or adjustments. Only
a qualified electrician equipped with the proper tools,
and wearing appropriate body protection against elec-
trical hazards should carry out such work.Before re-
moving any panels from the enclosure, or dismantling
any part of the unit, isolate from the main electrical
power supply. Lock the isolator in the‘OFF’ position
and remove the fuses. Attach a labelto the isolator
switch carrying the warning ‘WORKIN PROGESS –
DO NOT APPLY VOLTAGE’. Do not switch on electri-
cal power or attempt to start the unit if a warning label
is attached.
When handling, operating or carrying out mainte-
nance on the unit, personnel must use safe engineer-
ing practices and observe all relevant local health
and safety requirements and regulations.
When air handling unit (AHU) products are installed
over doorways or within the ceiling framework, most
maintenance or repair work will be carried out at
heights in excess of 2 metres. Suitable precautions
should be taken to ensure that any access equipment
used, ladders, towers, etc., are isolated from passing
human traffic by the use of an appropriate barrier/ no-
tice system. Any barriers used should be positioned
at a suitable distance to remove risk of injury to pass-
ing personnel from dropped tools/components.
All equipment used to gain access to work at height
must be properly secured, and manned by sufficient
support staff to meet National/Local safety regula-
tions.
Attention should be paid to the weight of units or indi-
vidual components, particularly when being removed
from the original installed location. Suitablelift-
ing equipment, including slings, straps, hooks, etc,
should be used as appropriate.
Cleaning
The elements of the air handling unit are accessible
upstream and downstream for cleaning purpose but
if the internal AHU functions have to be taken out for
cleaning or maintenance purposes, where access is
gained via removable panels, each enclosure panel
can simply be removed from the outside to ensure
complete and easy access to components, however,
care should be taken to ensure the panel can be ad-
equately supported when removed, particularly when
working at height.
Doors must be opened only by authorized persons.
Prior to the commencement of any cleaning work , the
HVAC system cleaning technicians shall per a visual
inspection of the AHU to determine if thfoerme are
any extra ordinary foreign objects that disturb AHU
components and try to find the reasons. If damaged
system components are found during the inspection
they shall be documented and brought to the atten-
tion of the manufacturer. If replacement parts are
needed, use only genuine Carrier spare parts.
Replace missing or damaged fasteners and gaskets
as required (sized to suit).
Air-Volume Control Devices (dampers and any air-di-
rectional mechanical devices) of the AHU must have
their position marked prior to cleaning, so that, upon
completion, they can be restored to their marked po-