Presentation on theme: "Installation Troubleshooting Warranty. Lamps and Dimming – Test Your Knowledge True or False: Dimming will reduce the life of a lamp. False Dimming has."— Presentation transcript:
Lamps and Dimming – Test Your Knowledge True or False: Dimming will reduce the life of a lamp. False Dimming has no effect on the life of a lamp. Properly designed dimming ballasts will provide sufficient filament heating and will maintain the full rated life of the lamp. True or False: Dimming will extend the life of a lamp. False Dimming has no effect on the life of a lamp. Properly designed dimming ballasts will provide sufficient filament heating and will maintain the full rated life of the lamp.
Fixture Construction and Best Practices Lamp spacing from the ground plane: Minimum lamp spacing to the fixture shall be > 6mm for the duration of the fixture life. (quite often, belly pans sag over time leading to lamps touching grounded metal.) Issues resulting from fixtures sagging will always be a fixture issue. The lamps and ballasts cannot prevent or cause the fixture belly pan to sag over time. Symptoms to look for: Belly pan is touching the lamp (obvious?) Lamps are bowed or bending Lamps drop out in dim mode Lamps are turning black in the middle (where the metal touches the glass) Inconsistent starting Inconsistent light levels
Fixture Construction and Best Practices Wiring in the ballast chamber is critical to the quality of light and dimming consistency between lamps. To minimize inconsistent dimming light levels and to eliminate inconsistent lamp starting and lamp dropout, the following guidelines MUST be followed: –When the ballasts are installed, all lead wires should be kept as short as possible –Output leads (wires from the ballast to the lamp sockets) should not be bunched, twisted, wrapped, or cable tied together. –Input wires (power wires and control wires) should not be bunched, twisted, wrapped, or wire tied together with the output wires. –Input and output wires should be routed on opposite sides of the wire way channel as best as possible.
Rapid vs. Instant start sockets vs. Instant start sockets Shunted Jumpered S Rapid start sockets Common Issues – Incorrect sockets
Dimming ballasts must NEVER NEVER NEVER be connected to instant start or shunted sockets! Doing so instantly voids the warranty! ALL BALLASTS AND LAMPS CONNECTED TO INSTANT START OR SHUNTED SOCKETS MUST BE REPLACED AS THEY HAVE BEEN PERMANENTLY DAMAGED. YES, THE LAMPS TOO!
Common Issues – Wiring issues Short lamp life – Is almost ALWAYS the result of a wiring issue Wiring issues, Symptoms to look for: Severe end blackening Lamps drop out at lowest dimming level Inconsistent / failure to start Lamp flickering / flashing / strobing Lamp Striations Short Lamp Life Short Ballast Life
Common Issues Other Incorrect Control – Must be Mark 10 control Flickering or drop out will occur if the input voltage is lower than 56vac for 120vac applications or 129vac for 277vac application (as measured AT THE BALLAST) Flickering due to a shared neutral This is a requirement of some control manufacturers. This is not a function of the ballast. The end user must be aware of the requirements of the controls they install. Overloaded Controls The control must be sized to handle the load. Overloaded controls could fail or result in performance issues.
Common Issues Other Pinched or Shorted Control Wires The system will be stuck in full dim mode. Will not respond to control signals. The issue must be corrected for the system to work, but this will not result in permanent ballast damage. Reversed Control Wires (purple and grey reversed) System or individual fixtures will dim out of sequence. Single fixture occurrences could reduce the top end light level of the entire circuit. Overloaded Controls The control must be sized to handle the load. Overloaded controls could fail or result in performance issues. AC voltage applied to the control wires (purple and grey) Trick question, this will not damage the ballast. The control leads on a Mark 7 ballast are designed to withstand electrical shorts, pinched wires, and the misapplication of ac voltage. However, potential damage to the controls will need to be reviewed with the controls manufacturer.
Common Issues Other Pinched or Shorted Control Wires: Will not respond to control signals. Reversed Control Wires (purple and grey reversed) Trick question, it doesnt matter for ROVR. There is no polarity. Noise on the control line Wire routing is critical. Noise will result in sporadic dimming control.
Wiring Comparison LampLeads BLACK WHITE Mark 10 Ballast Mark 7 Ballast LampLeads BLACK WHITE 0-10VController VIOLET (+) GREY(-) DIMMER ROVR Ballast LampLeads BLACK WHITE DALIController VIOLET VIOLET