Daikin RoofPak RAH - IM 987: Routine Maintenance

Routine maintenance should cover the following items:

• Tighten all belts, wire connections, and setscrews

• Clean all mechanically or with cold water, if necessary. Usually any fouling is only matted on the entering air face of the coil and can be removed by brushing.

• Lubricate the motor and fan shaft bearings.

• Align or replace the belts as needed.

• Clean or replace the filters as needed.

• Check for proper superheat

• Check for proper subcooling.

• Check for blockage of the condensate drain. Clean the condensate pan as needed

• Check the power and control voltages.

• Check the running amperage of all motors.

• Check all operating temperatures and pressures.

• Check and adjust all temperature and pressure controls as needed

• Check and adjust all damper linkages as needed.

• Check the operation of all safety controls.

• Examine the gas furnace (see IM 684 or IM 685)

• Lubricate the door latch mechanisms

If the unit is stored on the ground, additional precautions should be taken as follows:

• Make sure that the unit is well supported along the length of the base rail

• Make sure that the unit is level (no twists or uneven ground surface)

• Provide proper drainage around the unit to prevent flooding of the equipment

• Provide adequate protection from vandalism, mechanical contact, etc

• Make sure all doors are securely closed.

• If isolation dampers are provided, verify that they are properly installed and fully closed to prevent the entry of animals and debris through the supply and return air openings.

• Units without isolation dampers should be fitted with covers over the supply and return air openings