York Rooftop Unit Y13DC04C1LABAB

Disconnect power from the blower motor unit

Ensure the unit is not in operation before lubricating bearings

Pipe Plugs Removal and Cleaning

Remove both pipe plugs at each end shell

Clean out any hardened grease or foreign matter from the pipe plugs

Grease Fitting Installation and Lubrication

Replace one plug on each end with a clean grease fitting

Using a low pressure grease gun, pump grease into the bearing cavity until new grease shows at the open port

Is the unit equipped with power exhaust fans or a return air fan?

Belt Tension Adjustment Procedure

Loosen the four bolts holding the motor base to the channels

Adjust the belt by turning nuts 'A' (see detail 'B')

Apply a perpendicular force to one belt at the midpoint of the span using a belt tension checker

Use a straight edge from sheave to sheave as a reference line to determine the deflection distance from the normal position

Select the fan type and motor horsepower for belt deflection force reference

Tension new belts at the maximum deflection force recommended

Ensure power is disconnected from the unit before starting maintenance

Switch the bypass VFD by hand on the front of the bypass enclosure in the fan cabinet

Set the switches on the front of the bypass box to the correct positions for normal running

If the drive fails, switch the BYPASS/OFF/DRIVE switch to BYPASS

Select the appropriate relubrication cycle based on operating speed and shaft size

Label all wires prior to disconnection

Filter Inspection and Replacement

Is the dimensional size of the replacement filter the same as the replaced filter?

Verify proper operation after servicing

Label all wires prior to disconnection

Verify outdoor fan motors are permanently lubricated

Is lubrication desired for outdoor fan motors?

Verify ventor motors are factory lubricated for 10-year life

Verify proper operation after servicing