Daikin Packaged Rooftop System DPS018AHMG2DW-4

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

Refrigerant Sensors or Switches serviced

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

Measure continuity through all fuses

All electrical connections are tight

Check the resistance to ground for each circuit

Prepare for storage control compartment

Is the electronic control equipment in the unit stored in a 5% to 95% RH (non-condensing) environment?

It may be necessary to put a heat source (light bulb) in the main control panel to prevent the accumulation of atmospheric condensate within the panel. The location and wattage of the heat source is dependent on local environmental conditions

Is the heat source adequate for current conditions?

Sign off on the rooftop system maintenance

Check cabinet air filters and replace if dirty

After heavy snowfall verify that combustion air intakes are not blocked by snow

Periodically check during periods of snow accumulation as drifting may also lead to combustion air intake blockage

Open a door on each section and verify that no moisture or debris is accumulating in the unit monthly during preparation for storage (p.137);

Select filter size based on cabinet size

Sign off on the filter replacement

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