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> roof top unit
roof top unit
General Inspection
Check for any visible damage or wear on the unit.
Inspect the area around the unit for debris or obstructions.
Verify that all access panels are secure and closed.
Here are some additional steps you could include in the General Inspection section of the rooftop unit checklist
Ensure there are no signs of rust or corrosion on the unit's exterior
Check for proper alignment of the unit on its mounting platform
Inspect insulation on refrigerant lines for integrity and proper coverage
Look for any signs of leaks around the unit, including oil stains or refrigerant residue
Verify that all fasteners and bolts are tight and in good condition
Assess the condition of the electrical connections for fraying or wear
Check for any unusual noises when the unit is operating
Confirm that all labels and warning signs are present and legible
Inspect the mounting hardware and brackets for stability and security
Ensure the condensate pan is clean and free of any obstructions
Electrical Components
Inspect electrical connections for signs of wear or damage.
Test safety controls and limit switches.
Ensure that all wiring is properly insulated and secured.
Filters and Airflow
Check and replace air filters as necessary.
Inspect ducts for blockages or leaks.
Verify that airflow is balanced and meets specifications.
Refrigerant System
Check refrigerant levels and inspect for leaks.
Test the compressor for proper operation.
Ensure that all refrigerant lines are insulated and secure.
Here are some additional steps that could be included in the Refrigerant System section of the rooftop unit checklist
Verify the pressure readings with a gauge to ensure they are within manufacturer specifications
Inspect the evaporator and condenser coils for cleanliness and signs of damage or corrosion
Check the expansion valve or metering device for proper operation and adjust if necessary
Ensure that the refrigerant charge is adjusted according to the ambient temperature and manufacturer guidelines
Inspect and clean the refrigerant sight glass, if equipped, to ensure clear visibility of refrigerant flow
Test for proper operation of the low and high-pressure switches and ensure they are functioning correctly
Check the refrigerant piping for proper routing and support to prevent vibrations and damage
Inspect the accumulator and receiver for signs of wear or leaks
Review the service history and refrigerant usage to identify any trends or recurring issues
Document any findings and maintenance performed for future reference
Fans and Blowers
Inspect fan blades for damage and clean as needed.
Ensure that motors are functioning properly and lubricated.
Check for unusual noises during operation.
Drainage System
Inspect condensate drain for clogs or blockages.
Clean the drain pan and ensure proper drainage.
Check for leaks around the drain lines.
Control Systems
Test the thermostat for accurate readings and functionality.
Inspect control panels for any warning lights or errors.
Ensure that all settings are properly configured.
Final Checks
Verify that the unit starts and operates smoothly.
Conduct a temperature check to ensure proper heating/cooling.
Document any maintenance performed and schedule the next service.
Here are some additional steps you could include in the Final Checks section of the rooftop unit checklist
Inspect for any unusual noises during operation
Check for vibrations that may indicate misalignment or imbalance
Confirm that all safety switches and alarms are functioning properly
Ensure that all access panels are securely closed and sealed
Monitor for any signs of refrigerant leaks around the unit
Verify that the thermostat is calibrated and responding accurately
Check the insulation on refrigerant lines for damage or wear
Assess the overall cleanliness of the unit and surrounding area
Ensure that all duct connections are secure and free of obstructions
Review and confirm that all manufacturer specifications are met
Test emergency shut-off functions to ensure they operate correctly
Inspect and confirm that the unit meets local codes and regulations
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