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HHCompact Air Handling Units
Safety Considerations
1.1 - General
The HHCompact air handling units (AHUs) have 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 prior discussion with Systemair B.V. 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 and
glasses must be worn for all maintenance operations. A
respiratory protection mask must be worn when changing
the filters. The A-weighted equivalent continuous sound
pressure level can be above 80 dB(A), depending on the
motor size, fan size, fan speed and the AHU installation
location. 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.
Only sufficiently qualified personnel 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.
CAUTION: In general electric heaters have a separate
supply and must be switched off separately.
If work lighting is required, use only lighting with 24 V
maximum. 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.
From January 1st, 2016 AHUs must comply with EU
regulation 1253/2014 implementing ErP directive
2009/125/EC, if they are within the scope of the
regulation and the directive.
EU regulation 1253/2014 is part of the CE-marking.
This regulation applies for:
•
‘ventilation unit’ (VU)
means an electricity driven
appliance equipped with at least one impeller, one
motor and a casing and intended to replace utilised air
by outdoor air in a building or a part of a building.
Where an AHU is regarded as a:
•
‘non-residential ventilation unit’ (NRVU)
means a
ventilation unit where the maximum flow rate of the
ventilation unit exceeds 250 m3/h, and, where the
maximum flow rate is between 250 and 1 000 m3/h,
the manufacturer has not declared its intended use as
being exclusively for a residential ventilation application.
The regulation defines two types of ventilation units.
These must be placed on the market or put into service, in
accordance with the requirements of this regulation.
•
‘unidirectional ventilation unit’ (UVU)
means a
ventilation unit producing an air flow in one direction
only, either from indoors to outdoors (exhaust) or from
outdoors to indoors (supply), where the mechanically
produced air flow is balanced by natural air supply or
exhaust
‘bidirectional ventilation unit’ (BVU)
means a ventilation
unit which produces an air flow between indoors and
outdoors and is equipped with both exhaust and supply fans
The following unit combinations are considered as a BVU:
•
Two or more units combined with a RAC heat recovery
system
•
Two or more units directly (without building-side
ductwork) connected with a mixing chamber.
If two or more units are combined as described above
on-site in the building by a third party (for example installer),
a BVU (based on CE-marked UVUs) will be “put into service”.
This means the third party has to declare product conformity
with the requirements of a BVU and CE marking.
Units can be supplied without accessories that are
indicated as mandatory in regulation 1253/2014. These
accessories must be supplied and installed by a third party.
The accessories that are not supplied but mandatory are
indicated in the technical specification of the AHU, e.g.
fans with variablespeed drive, thermal bypass device, heat
recovery, visual signaling or a filter alarm (2018 regulation).
1.3 - Instruction types
The following warning pictograms and labels with text are
used.
Lifting point
This pictogram shows where the AHU must be lifted and is
positioned on the support beam.
