Pre-Start
Component Overview
Verify the fan and motor shafts are parallel.
Verify the fan and motor sheaves are aligned.
Check the belt tension for proper adjustment. Adjust the belt tension if it is floppy or squeals continually.
Ensure the fan rotates freely in the correct direction.
Tighten locking screws, bearing set screws and sheaves.
Ensure bearing locking collars do not wobble when rotated and correct torque settings. Refer to Table 31, p. 64 for recommended torques.
Verify that a clean air filter is in place.
Ductwork
If using return ductwork to the unit, secure it with three inches of flexible duct connector.
Extend discharge duct upward without change in size or direction for at least one and one half fan diameters.
Use a 3” flexible duct connection on discharge ductwork.
Ensure trunk ductwork is complete and secure to prevent leaks.
Verify that all ductwork conforms to NFPA 90A or 90B and all applicable local codes
Unit Piping
Verify the condensate drain piping is complete for the unit drain pan. Install and tighten the condensate “P” trap drain plug.
Make return and supply water connections to the unit and/or piping package.
Ensure the drain pan and condensate line are not obstructed. Remove any foreign matter that may have fallen into the drain pan during installation.
Verify that piping does not leak. Make sure drain lines are open while performing the leak test.
Treat water to prevent algae, slime, and corrosion.
Connect refrigerant piping lines.
Connect steam supply lines and condensate return lines to coil in accordance with steam piping recommendations.
Electrical
Check all electrical connections for tightness.
Verify motor voltage and amps on all phases with the unit nameplate ratings to ensure unit operates correctly.
Unit Panels
Ensure all unit access panels are in place and that all screws, nuts, and bolts are tightened to their proper torques.
Note: During the unit
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