Daikin Packaged Rooftop System DPS018AHMY4DW-4

Warning: This maintenance requires trained and experienced service technician

Fuel pressure settings and control settings should be made only by persons thoroughly experienced with the burner and control system

Always replace covers on burner controls and boxes as the electrical contacts are sensitive to dust and dirt

Perform maintenance of controls, gas valves, and other components in accordance with instructions in the manufacturer’s bulletins

Installation and maintenance must be performed only by qualified personnel who are experienced with this type of equipment and familiar with local codes and regulations

Gas or Hot Water Piping: A qualified Architect or Systems HVAC Design Engineer familiar with piping design, local codes and regulations, must provide piping design

Moving machinery and electrical power hazards. May cause severe personal injury or death. Disconnect and lock off all power before servicing equipment

Sharp edges are inherent to sheet metal parts, screws, clips, and similar items. May cause personal injury. Exercise caution when servicing equipment

Disconnect all electric power to the unit when servicing control panel components. Before servicing, always inspect units for multiple disconnects to ensure all power is removed from the control panel and its components

Check all moving parts for wear every six months

The Rebel exhaust fans are direct drive variable speed fan/motor combination, which do not have belts or pulleys to maintain

The bearings are permanently sealed and do not require periodic greasing. The Rebel 3-15 ton units have similar supply fans.

The Rebel 16-28 tons supply fans have a direct drive motor

These larger motors are not permanently sealed and will require greasing every 9000 hours

Sign off on the 9000 Hours / 6 Monthly Rooftop System Maintenance

Select filter size based on cabinet size

Sign off on the filter replacement

CAUTION: Severe loss of charge may occur if the high refrigerant pressure switch is replaced before reclaiming the refrigerant. Replace pressure switch after reclaiming refrigerant

DANGER: Hazardous voltage. May cause severe injury or death. Disconnect electric power before servicing equipment. More than one disconnect may be required to de-energize the unit

Service Refrigerant Sensors or Switches

Service Optional Electric Heater

Measure continuity through all fuses

Check that all electrical connections are tight. Look for signs of arcing

Check the resistance to ground for each circuit. It should be infinite

Check the resistance phase to phase for each circuit

Check combustion inducer fan for dirt buildup and lint

Check combustion air intake louvers and flue box/vent for accumulation of dirt and debris

Inspect and clean flue tubes and combustion chamber

Keep burner vestibule clean. Dirt and debris can result in poor combustion and lower efficiency

Sign off on the rooftop system maintenance