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General Information
Foreword
General
EVO-M 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 discussion with AERA 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.
Warnings and cautions
Warnings and Cautions appear at appropriate sections throughout this manual. Your personal safety and the proper operation
of this machine require that you follow them carefully. The constructor assumes no liability for installations or servicing performed
by unqualified personnel.
WARNING!:
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION!:
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also
be used to alert against unsafe practices or for equipment or property-damage-only accidents.
Safety Considerations
To avoid death, injury, equipment or property damage, the following recommendations should be observed during equipment
operation:
1. The units are suitable for ambient air temperature between -20°C and +60°C and for air flow temperature between -20°C
and +40°C. Different conditions need written confirmation from the manufacturer.
2. Care should be taken by the user to prevent frost in coils. For ambient temperatures below 0C make sure that water inside
the cooling coil is removed during winter and a minimum of 25% Ethylene Glycol is added to heating water circuit.
3. Components - Some OEM products have specific manufacturer’s service instruction documents. These are delivered with
the Air Handling Unit. In this case, the indications in the OEM manual are valid and the service handbook in hand has only
general or complementary character for the relating components.
4. Liquid and gas storage -Maximum working pressure for all coils is 15bar. In case of coil connections to higher working
pressures, any warranty relating to coil tightness and personnel safety is excluded.
5. Tubing filled with mediums with very high or low working temperatures are to be insulated with suitable materials to avoid
burn or scald injuries caused by contact.
6. As fire prevention, fire dampers are to be provided where ducts cross firebreaks. Local fire prevention code is to be observed
carefully.
7. In case of external electrical heater usage, the operation of the heater and AHU must be interlocked and appropriate safety
components are used in the electrical circuit.
To avoid death, injury, equipment or property damage, the following recommendations should be observed during maintenance
and service visits:
1. The maximum allowable pressures for system leak testing on low and high pressure side are given in the chapter “Installation”.
Always provide a pressure regulator.
2. Disconnect the main power supply before any servicing on the unit.
3. The Air Handling Unit control system must guarantee that in case of breakdown or power interruption during maintenance
or repair work, the unforeseen start-up of a shut off unit is impossible.
4. Service work on the refrigeration system and the electrical system should be carried out only by qualified and experienced
personnel.
5. For inspection on the Air Handling Units and to avoid risks, the units surroundings are to be sufficiently lighted.
6. Heat exchangers filled with refrigerants must be serviced by specialized personnel. Waste disposal or recycling of dangerous
refrigerants must done in accordance with all international, national, and local regulations.
7. Where units are installed in areas with high temperature and/or high humidity, the risks of external condensation on the
casing must be considered.
