Daikin Packaged Rooftop System DPSO12AHMG2DW

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

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 in the main control panel functional?

Is the heat source adequate for current conditions?

Check the control compartment every two weeks to confirm that the heat source is functional and is adequate for current conditions.

Sign off on the 2 Weekly Rooftop System Maintenance

Warning: This maintenance requires trained and experienced service technician

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

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

Warning: 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

Warning: 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

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

Warning: Sharp edges are inherent to sheet metal parts, screws, clips, and similar items. May cause personal injury

Danger: Hazardous voltage. May cause severe injury or death. Disconnect electric power before servicing equipment

All blowers, including furnace inducer, have sealed bearings. No lubrication is necessary

The Rebel unit has many configurable options that can affect the refrigerant charge. Actual unit charge is given on the unit's data plate found on the inside of the control panel

The Rebel unit uses electronic expansion valves that maintain peak efficiency. Liquid sub-cooling and suction super heat float and should not be used as an indication that charge needs to be added or removed from the system

If a leak is suspected, the full charge should be removed and weighed. Weight should be compared against the unit nameplate data. Unit should be recharged with the amount given on the unit nameplate

POE and PVE oil is hygroscopic and does absorb moisture when exposed to atmosphere. Steps should be taken to minimize exposure time to atmosphere during any maintenance where the sealed system is to be opened

Rebel 003-015 refrigerant systems use only Polyvinylether (PVE) oil. Rebel 016-028 refrigerant systems use only Polyester (POE) oil

NOTICE: Do not use POE oil in DPS 003-015 refrigerant systems and do not use PVE oil in DPS 016-028 refrigerant systems

The entire system must be evacuated using a suitable vacuum pump

The quality of vacuum is measured using a suitable micron gauge that has been calibrated

WARNING: Prior to cleaning the unit, turn off and lock out the main power switch to the unit and open all access panels

The following cleaning procedures are recommended as part of the routine maintenance activities for Option E Coated Coils. Documented routine cleaning of Option E Coated Coils is required to maintain warranty coverage.

1. Remove Surface Loaded Fibers: Surface loaded fibers or dirt should be removed prior to water rinse to prevent further restriction of airflow.

2. If unable to back wash the side of the coil opposite that of the coils entering air side, then surface loaded fibers or dirt should be removed with a vacuum cleaner. If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges bent over) if the tool is applied across the fins.

NOTE: Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibers and dirt into the coil. This will make cleaning efforts more difficult. Surface loaded fibers must be completely removed prior to using low velocity clean water rinse.

3. Periodic Clean Water Rinse: A monthly clean water rinse is recommended for coils that are applied in coastal or industrial environments to help to remove chlorides, dirt and debris. An elevated water temperature (not to exceed 130°F) will reduce surface tension, increasing the ability to remove chlorides and dirt. Pressure washer PSI must not exceed 900 psig and the nozzle should remain at least 1 foot from the coil to avoid damaging fin edges.