Steam and Chemical Cleaning

Scope:

1. Pre-Cleaning Site Assessment

   • Inspect unit type, accessibility, and contamination level

   • Assess condition of coils, filters, drain pans, and internal components

   • Identify if unit can be cleaned in place or needs disassembly

2. System Shutdown & Isolation

   • Power off and safely isolate AHU or FCU unit

   • Implement Lockout/Tagout (LOTO) procedure to ensure safety

3. Removal of Filters and Access Panels

   • Remove air filters, drain pans, and access covers for full cleaning access

   • Inspect filters for replacement or cleaning

4. Steam Coil Cleaning

   • Use high-pressure steam to deep clean evaporator (cooling) 

   • Break down and remove biofilm, mold, dirt, and oil residue lodged between coil fins

   • Avoid use of harsh chemicals — environmentally friendly and non-corrosive process

5. Drain Pan and Condensate Line Cleaning

   • Steam clean and sanitize the drain pan

   • Flush the condensate drain line to prevent blockage and microbial growth

6. Fan, Blower, and Motor Housing Cleaning

   • Steam clean fan blades, blower wheels, and surrounding compartments

   • Remove dust and grime to ensure smooth airflow and balanced rotation

7. Internal Casing and Insulation Disinfection

   • Apply steam to internal metal panels and insulation (if suitable) to kill bacteria and odors

   • Wipe down with microfiber cloths or vacuum residues

8. Filter Cleaning or Replacement

   • Clean washable filters with steam or mild detergent

   • Replace disposable filters if necessary

9. Post-Cleaning Inspection & Testing

   • Inspect all components for cleanliness and functionality

   • Reinstall access panels and filters

   • Power up the unit and test airflow, temperature, and condensate drainage

10. Documentation & Reporting

• Provide before-and-after photos and detailed cleaning report

• Log maintenance activity for compliance and health records

• Recommend next cleaning schedule based on site conditions