Engineered Air HVAC Unit LM-32-K

Ensure that sufficient airflow as marked on the unit rating plate is passing through the heater.

Check for signs of potential problems

Inspect open coil elements for bright red glowing areas when viewed in the dark with the unit operating.

Lubrication of Dodge Fan Bearings — Spherical Roller Bearing, Solid Pillow Block

Determine re-lubrication schedule based on shaft diameter and speed (RPM)

Is the unit operating at 24 hours?

Re-lubricate while running if safety permits until some purging occurs at seals

Adjust lubrication frequency based on condition of purged grease

Lubricate with a multipurpose roller bearing NLGI No. 2

Lubricate bearings prior to extended shutdown or storage

Rotate shaft monthly to aid corrosion protection

Is the bearing temperature under 120°F (50°C)?

Is the environment dusty and wet?

Is the bearing temperature under 158°F (70°C)?

Select shaft diameter for grease quantity

Use lithium base lubricant for greasing

Ensure not to overgrease the bearings

Inspect coils and drain pans for cleanliness and biological growth

Clean the external surface of finned coils using a low pressure water spray and a brush

Ensure no high pressure steam or water is used for cleaning

Verify cleaning additives or solutions are compatible with coil materials or coatings

Use a fin comb to straighten any damaged or bent fins

Drain and blow out water coils with compressed air

Fill and drain coils several times with appropriate strength pre-mixed inhibited HVAC glycol or other suitable fluid

Check set screws for looseness on the shaft

Tighten set screws where required

Record any observations or issues noted during the check

Refer to Table I for Bearing Setscrew Torques