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General • Inspections

Precedent™(WSC036H-WSC060H, WSC072H, WSC090H, WSC092H, WSC102H, WSC120H, W/DHC036H-W/DHC120H) Rooftop Units: Monthly Maintenance

Preventive maintenance is a simple and cost-effective way to ensure your HVAC system is running at peak efficiency and to catch problems before they get serious.
MaintainX
08/10/2022

Precedent™(WSC036H-WSC060H, WSC072H, WSC090H, WSC092H, WSC102H, WSC120H, W/DHC036H-W/DHC120H) Rooftop Units: Monthly Maintenance

Preventive maintenance is a simple and cost-effective way to ensure your HVAC system is running at peak efficiency and to catch problems before they get serious.

    Monthly Maintenance

    Before completing the following checks, turn the unit OFF and lock the main power disconnect switch open.

    ! WARNING

    Hazardous Voltage!

    Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Verify that no power is present with a voltmeter.

    Filters

    Inspect the return air filters. Clean or replace them if necessary. Refer to the unit Service Facts for filter information.

    Return Air Smoke Detector Maintenance

    Airflow through the unit is affected by the amount of dirt and debris accumulated on the indoor coil and filters.

    To insure that airflow through the unit is adequate for proper sampling by the return air smoke detector, complete adherence to the maintenance procedures, including recommended intervals between filter changes, and coil cleaning is required.

    For detailed instructions concerning these checks and procedures, refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature package for this unit.

    Periodic checks and maintenance procedures must be performed on the smoke detector to insure that it will function properly

    Condensate Overflow Switch

    During maintenance, the switch float (black ring) must be checked to ensure free movement up and down.

    Cooling Season

    With the unit running, check and record the following:

    Record this data on an “operator’s maintenance log” like the one shown in Table 19, p. 59. If the operating pressures indicate a refrigerant shortage, measure the system superheat. For guidelines, refer to the “Compressor Start-Up” section.

    Important: Do not release refrigerant to the atmosphere! If adding or removing refrigerant is required, the service technician must comply with all federal, state and local laws. Refer to general service bulletin MSCU-SB-1 (latest edition).

    Heating Season

Source: MaintainX (Community Member)

Please note that any procedure, checklist, or other document available in the MaintainX Procedure Hub is provided for general education and information only and does not constitute legal, medical, or financial advice. MaintainX makes the materials available AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any such use, including compliance with applicable law and with meeting any conditions of product warranties.