Daikin Fan Coil Unit HHDB-106A

Standard filters are the disposable type and should be renewed frequently to obtain maximum performance.

Periodic vacuuming of cleanable filters from the inlet side reduces the need for frequent washing.

Filters can be removed through either side or the bottom of the unit.

Select the side from which the filter was removed

Sign off on the filter maintenance

Warning: Ensure the fan assembly is powered off before starting the cleaning process.

Is the blower wheel and housing free of dust and dirt?

Upload a photo of the cleaned blower wheel and housing.

Set screw on the motor shaft loosened?

Upload a photo of the removed motor.

Check all items against the bill of lading to ensure all crates and cartons have been received.

Inspect all units for damage upon receipt.

Report any visible or concealed damage to the carrier and file a claim.

Record and report any hidden damage to the carrier and file a claim.

In the event of a claim for shipping damage, retain the unit, shipping carton, and all packaging for physical inspection by the freight carrier.

Store all equipment in the factory shipping carton with internal packing in place until installation.

Perform a final visual inspection as the initial step in any start-up operation.

Inspect all equipment, plenums, ductwork, and piping to verify that all systems are complete and properly installed and mounted.

Ensure no debris or foreign articles such as paper or tools are left in the units or other areas.

Warning: Only trained personnel should perform this procedure.

Is the fan running at factory set flow rates?

If different flow rate is required, follow the next steps.

Measure the DC reference voltage between the com port and corresponding flo port.

Enter the desired CFM or the measured DC reference voltage.

For example, if terminal Flo1 is on and the Flo1 dial is turned until the Flo1 reference voltage = 2.5, then the motor will run at the CFM that corresponds to 2.5V.

Note: The Flo0 dial should always be set at 0V to prevent the fan from running when all speed outputs are OFF.

Prior to the water system start-up and balancing, the chilled and hot water systems should be flushed to clean out dirt and debris, which may have collected in the piping during construction.

All unit service valves closed?

This prevents foreign matter from entering the unit and clogging the valves and metering devices.

Strainers installed in the piping mains?

During system filling, air venting from the unit is accomplished by the use of a manual air vent installed on the coil.

Turn the screw on the manual air vent counterclockwise no more than 1.5 turns to operate the air vent.

The entire system should be checked for potential air traps and vented through the main air vents as often as required.

The unit air vent does not replace the main system vents.

Sign off on the Heating/Cooling System Maintenance