Back

Precedent™RT-SVX38D-EN Rooftop Units: Monthly Maintenance

This procedure is the recommended monthly maintenance procedure for your equipment. Performing all maintenance procedures and inspection at the recommended intervals will prolong the life of your chiller and minimize the possibility of malfunctions.
MaintainX
10/24/2021

Precedent™RT-SVX38D-EN Rooftop Units: Monthly Maintenance

6 steps
This procedure is the recommended monthly maintenance procedure for your equipment. Performing all maintenance procedures and inspection at the recommended intervals will prolong the life of your chiller and minimize the possibility of malfunctions.
  • Monthly Maintenance

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

  • ! WARNING

  • Rotating Components!

  • During installation, testing, servicing and troubleshooting of this product it may be necessary to measure the speed of rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components, perform these tasks. Failure to follow all safety precautions when exposed to rotating components could result in death or serious injury

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

  • Filters

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

  • Condensate Overflow Switch

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

  • Cooling Season

  • Note: 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.

  • Heating Season

  • Coil Cleaning

  • Regular coil maintenance, including annual cleaning enhances the unit’s operating efficiency by minimizing the following:

  • Hail Guard Removal

  • Microchannel (MCHE) Coils

  • ! NOTICE

  • Coil Damage!

  • Failure to follow instructions below could result in coil damage. DO NOT use any detergents with microchannel condenser coils. Use pressurized water or air ONLY, with pressure no greater than 600psi.

  • The recommended cleaning method for microchannel condenser coils is pressurized water or air with a nonpinpoint nozzle and an ECU of at least 180 with pressure no greater than 600 psi. To minimize the risk of coil damage, approach the cleaning of the coil with the pressure washer aimed perpendicular to the face of the coil during cleaning.

  • Round Tube Plate Fin (RTPF) Coils

  • To clean refrigerant coils, use a soft brush and a sprayer (either a garden pump-up type or a high-pressure sprayer). A high-quality detergent is also required; suggested brands include “SPREX A.C.”, “OAKITE 161”, “OAKITE 166” and “COILOX”. If the detergent selected is strongly alkaline (ph value exceeds 8.5), add an inhibitor.

  • ! WARNING

  • Hazardous Chemicals!

  • Failure to follow all safety instructions below could result in death or serious injury. Coil cleaning agents can be either acidic or highly alkaline and can burn severely if contact with skin occurs. Handle chemical carefully and avoid contact with skin. ALWAYS wear Personal Protective Equipment (PPE) including goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data Sheet and follow all recomme

  • Safe Handling Practices:

  • Screenshot2021-01-27at1.47.56PM.png

Please note that any procedure, checklist, or other document available in the MaintainX Global Procedure Library 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.