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1 - SAFETY CONSIDERATIONS
1.1 - General
Air Handling unit (AHU) is a device used to regulate and
circulate air as part of a heating, ventilating, and air-
conditioning (HVAC) system. So it can not be used for
differents purposes. The 39SQ air handling units (AHUs)
has been designed and manufactured in accordance with
the CE machine directive. In order to guarantee safe
operation and use of the unit, please carefully read and
observe the instructions in this document and pay special
attention to the warnings that apply to this unit. Any
modifications in the design and/or installation of the AHU
that are carried out without discussion with Carrier and
without advance written agreement will result in the loss of
the right to any warranty claims and any claim for injury to
personnel as a result of these modifications.
All work must be carried out by sufficiently trained
personnel.
All applicable personal safety devices must be used to
ensure safe working conditions. Safety gloves, glasses and
shoes must be worn for all maintenance operations. A
respiratory protection mask must be worn when changing
the filters. This pictogram shows the safety requirements
for all maintenance operations.
The technical staff should be use the most suitable
lightining for maintenence and startup. The unit should be
lighted according to EN12100.
The A weighted equivalent continuous
sound pressure level is between 70 and
85 dB(A), depending on the motor size,
fan size and fan speed. This means that
ear defenders must be worn, when the
fan is running.
All doors and hatches must have at
least one lock that can only be opened
with a special device.
Heating and cooling coils are
manufactured and supplied in
accordance with guidelines of the
Pressure Equipment Directive (PED).
Do not walk on the roof panels of units
installed inside or
outside.
Technical staff who is responsible for startup and
maintanence, has to take occupational health and safety
trainings according to the relevant national laws and
obligations. Only technical staff who fits this definition is
allowed to work on (electrical) components. All power
supplies to the unit must be disconnected, before any work
can be carried out.
Switch off the supply voltage using the main disconnect
switch /emergency stop switch.
CAUTION: Electric heaters have a separate supply and
must be switched off separately.
Use of electical equipment with a voltage above 48 V is
only permitted if an earth leakage switch is installed that
complies with local and national regulations.
1.2 - Applications
The AHU is designed for the movement and conditioning of
air, unless otherwise agreed during the design stage.
Lifting point
This pictogram shows where the AHU must be lifted and is
positioned on the support beam.
Lifting prohibited
This pictogram shows that no horizontal transport devices
must be placed under this frame section, such as pallet
lifters or the forks of fork lift trucks. It is also forbidden to
place lifting devices for transport and storage under this
frame element.
1.3 - Instruction types
The following warning pictograms and labels with text are
used.
Earthing
This pictogram indicates where the AHU can be earthed
and is on one of the support beams beneath the casing in
the fan section. If a unit consists of several sections, only
one section needs to be earthed, provided the sections are
connected in the correct way.
•
The electrical components in the AHU must be
earthed, except for components with double insulation
and/or components with a supply voltage below 50 V.
•
The electrical components must be installed in
accordance with national and local regulations.
