Daikin Double Skin Modular Air Handling Unit DS2TB-0710

Check steam distribution system for deposits

Describe the type and amount of deposits found

Determine the total number of Colony Forming Units (CFUs) in the humidifier water

If number of CFUs > 1000 CFU/ml: Clean, rinse and dry the tray, disinfect, test quality of supply water

Check functionality of the control valve

Describe the malfunction of the control valve

Describe the malfunction of the humidity limiter

Sign off on the humidifier maintenance

The unit should be maintained in line with the manufacturer’s recommendation

Please refer to the installation and maintenance manual for details

For Hygienic and Clean AHU, the face of the heat wheel should be inspected regularly for dust and dirt to check if the self cleaning due to counter flow and rotation of the heat wheel is insufficient

For a small amount of dirt, use a vacuum cleaner to clear off the dirt

For more stubborn dirt, use compressed air to dislodge the dirt but handle with care so that the heat wheel media is not damaged

Finally, for firmly attached dirt in the rotor, use hot water and a mild detergent to remove the dirt

The mild detergent may be removed with high pressure water cleaner with the nozzle 300mm from the heat wheel

For disinfection, please use an isopropanol-based substance such as LIV +45

For Hygienic and Clean AHU plate heat exchangers, please use a brush to clean the inlets and the outlets for normal ventilation applications

Check for contamination, damage, microbial growth and corrosion

Describe the contamination, damage, microbial growth and corrosion found

Check spray nozzles for deposits

Describe the deposits found on the spray nozzles

Check functionality of the conductivity sensor

Describe the issues found with the conductivity sensor

Check moisture eliminator for contamination, damage, scaling and corrosion

Describe the contamination, damage, scaling and corrosion found on the moisture eliminator

Check the region downstream of droplet eliminator

Check the fan for any damage or cracks

Check the fan for Excessive vibration

Check the Flexible connection of the fan

Frost protection of the coil section checked

Coil section checked for any leakage

Bolt & nut checked for security

If bolt & nut were not secure, tighten them

Sign off on the coil section maintenance