York Rooftop Unit Y14FC04C1LABAB

Refrigerant Charge Verification

Verify the factory charge of R-22

Is the correct charge indicated on the unit nameplate?

Thermal Expansion Valves (TXVs) Check

Check the number of independent refrigeration systems

Measure the superheat leaving the evaporator coil

Are adjustments to the TXVs necessary?

Moisture/Liquid Sight Glass Inspection

Ensure the following components are present

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

Determine the deflection distance from the normal position using a straight edge from sheave to sheave as a reference line

Select the fan type and motor horse power for belt deflection force

Is the belt tension within the recommended deflection force range?

Review the installation for any errors, leaks, or undesirable system effects.

Verify if blower speed changes are necessary.

Enter the PD of the standard sheave.

Calculate the PD of the new sheave using the formula: (Specified CFM/Measured CFM) X PD of standard sheave.

Check motor for accumulations of dust

Check for loose, damaged or misaligned drive components

Check that all mounting bolts are tight

Replace defective parts as required

Label all wires prior to disconnection

Verify outdoor fan motors are permanently lubricated

Is lubrication desired for outdoor fan motors?

Verify vendor motors are factory lubricated for 10-year life

Verify proper operation after servicing