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Rooftop Dedicated Outdoor
Air System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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INSTALLATION
Lifting Guidelines
Lifting Guidelines
• Crane lift only.
• Preparation of curb and roof openings must be completed before lifting the unit to the roof.
• Units have integral U-bolt lifting lugs located on the exterior at the top. ALL lifting lugs must be used during lifting.
• The cables or chains must be at least double the length of the unit to prevent stress on the structure.
• Spreader bars are required for lifting the unit to prevent damage to the cabinet.
• Chain angle at point of lug connection must never exceed 20° from vertical in any direction.
• Always test-lift the unit to check for proper balance and rigging before hoisting to desired location.
•
Do not use belt-type slings.
•
Do not twist the lines holding the unit while it is being lifted.
• Failure to follow proper instructions could result in serious injury or death.
• Use the appropriate crane equipment to transport each unit; ensure the crane is capable of supporting the weights listed in the specification
tables. If the crane is not properly secured, it may result in an accident that causes physical injury or death.
•
Never lift the units in windy conditions.
• Wear protective gloves when handling equipment. Sharp edges may cause personal injury.
• Tear apart and throw away plastic packaging so that children may not play with them and risk suffocation and death.
WARNING
Failure to follow proper instructions could result in property damage.
For DR and DE11-XX, 21-XX, 31-XX Chassis, AR-DR models have four (4) lugs; AR-DE
models have six (6) lugs.
Figure 1: Rigging for Rooftop DOAS Units with DR and DE11-XX,
21-XX, 31-XX Chassis.
Figure 2: Rigging for Rooftop DOAS Units with DR and DE35-XX
Chassis.
For DR and DE35-XX Chassis, AR-DR models have six (6) lugs, AR-DE models have
eight (8) lugs.
