499231
10 | IV-50 EC
o If using Post-Installed Mechanical Anchors (Adhesive), anchors must be tested and evaluated to ACI 355.4 requirements.
◊ If you are mounting to steel or wood frames, you must use vibration isolators.
Anchoring:
◊ Contractor to anchor suspended unit to concrete with (1) 3/8-inch diameter concrete anchor capable of resisting 40 lbs (Safety Factor
of 4 equals 160 lbs) of tension load with minimum embedment of 2-inch at each of the (4) support points.
◊ Refer to the anchor manufactures installation instructions for proper installation torque and embedment depth.
Positioning:
◊ Position the fan unit so that the outlet is pointing in the planned direction of flow.
◊ Provide enough free space for inspection and maintenance work on the fan unit.
◊ Always install in a horizontal position, parallel to the ground.
7.4.1 Vibration dampers
◊ Use vibration isolators suitable for the respective product weight, as needed.
◊ A supplemental restraint shall be used to accomplish the support and restraint.
7.4.2 Resonance frequencies
◊ Avoid resonant frequencies.
◊ The minimum fan speed should be double the resonance frequency of the anti-vibration system (vibration isolators).
7.5 Deectors
◊ Position the deflector fins so that after fastening the jet fan to the ceiling, the airflow is directed downwards at a 10° angle or as
specified by the schedule.
Important
Risk of damage to the fan due to incorrect vibration dampers.
Important
Risk of damage to the fan due to resonance frequencies.
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