Daikin Double Skin Modular Air Handling Unit DS2TB-1823

Ensure a positive seal between the rotor face and frame structure

Check if the seals are intact and contact the casing and rotor media

Check if there is excessive wear

Ensure there is no significant leakage between the casing and interconnecting duct work

Check for misalignment of the drive belt on the pulley or periphery of the rotor

Check the belt joint. Replace it, if necessary

Check the fan for any damage or cracks

Check the fan for Excessive vibration

Check the Flexible connection of the fan

CAUTION! HIGH AIR TEMPERATURE IN THE FAN SECTION CAN CAUSE MOTOR OVERHEAT AND DAMAGE. ON DRAW-THROUGH AIR HANDLERS, ADJUST THE DISCHARGE AIR TEMPERATURE OF THE HEATING SECTION NOT TO EXCEED 1040 F (400C)

Make sure to completely isolate the Electrical source

Re-check and Re-tension the drive belts due to stretch

Check and adjust the pulley alignment to ensure the motor fixing is properly secure

Check all bearing, wheel bolts & nuts and sheave set screws (or cap screw) are in secure position

Sign off on the air handling unit check

Frost protection of the coil section checked

Coil section checked for any leakage

Bolt & nut checked for security

Were any loose bolts or nuts found?

If loose bolts or nuts were found, tighten them

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