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2.1 UNIT OVERVIEW
ARIA AL units are Evaporative Coolers. The standard control system is a standalone wall switch or BMS to control the
fan and water pumps. Appendix A provides wiring diagrams.
When the pumps are turned on water is drawn into the unit and dispersed through the evaporative cooler pads. The fan
is then turned on drawing air across the damp pads lowering the temperature of the air before being fed into the duct
work.
Coolers are supplied with one speed VSD compatible motors or 2 speed motors.
GENERAL INFORMATION
AMI051-B
Figure 2: Discharge Options
2.2 EQUIPMENT RECEIPT
Inspect the unit for any damage caused in transit. Any such damage must be immediately reported to the shipper of the
goods.
The unit has been factory tested to check for correct operation of all components. If any part is obviously missing or
damaged, notify the supplier immediately.
2.3 FACTORY UNIT TEST
All AIRA coolers are given a factory unit test which covers the function test and checks of the safety system including;
• Blower/fan operation
• Electrical wiring
2.4 MODEL DESIGNATION
AIRA AL Coolers come in 4 sizes (AL18, AL25, AL30 and AL36) offering a range of airflows. Each unit has a range of
pulley kits available which can be purchased to meet the pressure and flow requirements. Units can be specified to
have top, side or bottom discharge.
Figure 1: External (left) and Internal (right) components
AMI098-A
AMI081-A
INCOMING
WATER
SUPPLY
WATER CONTROL
PUMP
BLEED VALVE
FLOAT
AUTO
DRAIN
FLOAT VALVE
BOTTOM DISCHARGE
SIDE DISCHARGE
TOP DISCHARGE
