Routine Maintenance
Ultraviolet (UV)
Germicidal
Irradiation Lights
The intensity of the ultraviolet energy emitted from the ultraviolet bulbs provided in this unit is dependent on the cleanliness and age of the bulb. The surface of the bulb should be kept as clean as possible for optimum intensity. Depending on the filtration level of the HVAC system and the general hygiene of the building, periodic cleaning may be necessary. Before attempting any maintenance procedures, always follow all warnings and cautions as detailed in this maintenance section.
WARNING Hazardous Voltage and Exposure to Ultraviolet Radiation!
This product contains components that emit
Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.
WARNING Hazardous Vapors!
If large numbers of UV bulbs are broken, an appropriate respirator should be considered to prevent inhalation of mercury vapors. Failure to use a respirator could result in death or serious injury.
CAUTION Broken Glass!
Bulbs are fragile and can be easily broken. Always use gloves and eye protection when handling these bulbs. Failure to handle bulbs properly may result in minor to moderate injury. Refer to the MSDS sheet from the bulb manufacturer for additional safety information.
Always use cloth gloves and suitable eye protection when cleaning or replacing these bulbs. Bulbs may break if dropped or handled improperly.
Disposal of Bulbs: UV bulbs, like fluorescent bulbs, contain mercury, which is a regulated hazardous waste. The disposal requirements for hazardous wastes are determined by local, state and federal guidelines. Check all regulations before disposing of bulbs to assure you have met all requirements.
Refer to the MSDS sheet from the bulb manufacturer for additional disposal, handling and safety information.
To clean the bulbs:
1Disconnect all electrical power to the unit and the ultraviolet bulbs.
2Wearing soft cloth gloves and safety glasses, use two hands and firmly grasp the bulb at each end.
3Rotate the bulb 90 degrees in either direction and move bulb away from the fixture and out of unit.
4Wipe down each bulb with a clean cloth and alcohol. Avoid touching the bulb with bare hands as skin oils can accelerate future glass soiling and degrade the bulb performance.
5Carefully return the bulb to the fixture and rotate it 90 degrees in either direction until it is firmly secured.
6Close and latch all unit panels and reenergize power to the lights.
Replacement of ultraviolet bulbs
The ultraviolet bulb should be replaced annually if operated continuously or after 9,000 hours of use if operated intermittently. Replacement bulbs must be the specific size and wattage as originally supplied from the factory.
Note: Although the lights may continue to generate a characteristic blue glow beyond 9,000 operating hours, the ultraviolet radiation emitted by the bulbs degrades over time and will no longer provide the intended benefit.
1Disconnect power to the HVAC unit and the ultraviolet bulbs.
2Wearing soft cloth gloves and safety glasses, use two hands to firmly grasp bulb at each end.
3Rotate bulb 90 degrees in either direction and move bulb away from the fixture and out of unit.
4Carefully install a new replacement bulb in the fixture and rotate it 90 degrees in either direction until firmly secured.
5If broken bulbs are found or if you are required to dispose of used bulbs, the proper warning and cautions must be followed.
6After replacing bulbs, close and latch all unit panels and reenergize power to the lights.
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