Inspection and Maintenance of the Heat Recovery Unit

1. Preparation for Inspection

• Prepare the necessary tools and measuring instruments. 
• Check access to the unit and ensure proper working conditions.

2. Visual Inspection of the Unit

• Check the overall condition of the unit:
• • Ensure there are no signs of rust or damage.
  • Check for traces of water or other liquids.
•  Inspect the condition of the belt:
• • Make sure it is not worn, loose, or cracked.
•  Check the condition of the motors:
• • Verify that there are no noticeable excessive vibrations or noise.
  • Visually inspect for signs of overheating or lubricant leakage.

3. Filters

• Replace the filters according to the unit type. 
• During replacement, check:
• • Proper placement of new filters,
  • Sealing of the frames,
  • Record the date of replacement.

4. Airflow Measurement

• Measure the airflow:
• • In all operating modes (e.g., Away, Home, High).
  • On both ducts (supply and exhaust branches).
• Adjust the values to the correct settings.

5. Final Check

• After replacement and measurements, perform a test run of the unit. 
• Verify:
• • Proper operation of the motors,
  • The unit does not produce unusual noises,
  • The unit turns on and off according to control settings. 
• Record the inspection results in the service log.