User manual FURMAN IT1230

[. . . ] But power distribution in North America, unfortunately, is not balanced. The distribution standards currently in use were derived from practices established over a century ago, when electric power use was limited to lighting and motors--long before any EMI-sensitive applications existed. The emphasis then was on convenience (from the power utilities' standpoint) and safety, but not noise cancellation. The result was a three-wire distribution scheme in which 120V branch circuits have a hot wire and a neutral wire, with the neutral tied to a third wire connected for safety to an earth ground. [. . . ] If you are installing the IT-1230 in a rack that has rear as well as front mounting rails, you may wish to order adjustable rear rack ears from Furman. They allow the IT-1230 to be securely attached both in front and in back. Order model RRM-2. Operation Circuit Breaker/Switch: The IT-1230 has just one control: the large blue switch on the front panel that is both a precision magnetic circuit breaker and an on-off switch. This breaker will trip (snap to the "off" position) if the total current drawn through the IT-1230 exceeds 30 amps. If this occurs, reduce the load by unplugging some equipment, then flip the switch back to "on. " Installation The power source to which the IT-1230 is connected must be adequate for use at 30 amps. We recommend a 30 amp circuit, LINE VOLTAGE 90 100 110 120 128 AC VOLTS Mains Below 80V 80-90 90-104 106-108 110-120 122-124 126-128 130-140 Above 140V Voltage Status Extreme (Shutdown) Low Marginal Low Medium Low Normal Medium High High High Marginal Extreme (Shutdown) Voltmeter Reading Meter off--Extreme Voltage LED flashes The LED beneath the 90V mark flashes Meter Reads in Low Red Meter Reads in Low Yellow Meter Reads in Green Meter Reads in High Yellow Meter Reads in High Red All Meter LEDs Flashing Meter off--Extreme Voltage LED Flashes Outlets OFF ON ON ON ON ON ON ON OFF Since safety agencies dictate that the 20 amp Edison outlets be overcurrent limited to 20 amps maximum, they are broken into two groups: Group A includes the two front panel outlets and two duplex receptacles on the rear. Group B is comprised of the remaining three duplex Edison outlets. Each group is protected by its own 20A breaker. The twistlock is capable of a full 30 amps, however. Soft Start/Outlets On/Off Indicator: When power is first applied to the IT-1230, the Soft Start feature is activated, indicated by a steady yellow color. Soft Start limits the inrush current to the IT-1230's transformer, which would otherwise be excessive. The result is that the IT-1230's output voltage does not reach its full level until several seconds have elapsed. When it has reached its maximum level, the LED color turns to green, indicating that all outlets are fully powered. Should the power at the IT-1230's outlets go off for any reason--either because the power switch is in the "off" position or because an Extreme Voltage Shutdown has occurred, the LED will light up red. Extreme Voltage Shutdown: This LED status indicator is normally off. It monitors a hazard particularly common in the entertainment industry: wiring faults--for example, accidental connection to 220V. The IT-1230 senses voltages that are so high or low that operation would be impossible (under 80V or over 140V) and shuts the power down before damage can occur. Upon initially applying power to the IT-1230, this indicator will be lit if the input is receiving below 80 volts or more than 140 volts, and power will not be applied to the IT-1230's outlets. If the unit has been operating with an acceptable input voltage and then that voltage goes out of the acceptable range, the IT-1230 will shut off power to the outlet and this LED will begin flashing. NOTE: If the mains power is below 80 volts and has caused the IT-1230 to remove power from its outlets, the IT-1230 will not restore power to the outlets until the mains voltage is more than 90 volts. If the mains power is above 140 volts and has caused the IT-1230 to remove power from its outlets, the IT-1230 will not restore power to the outlets until the mains voltage is less than 130 volts. The reason for this is to prevent the power oscillating on and off in marginal conditions. [. . . ] Also, please enclose a note giving your name, address, phone number and a description of the problem. NOTE: All equipment being returned for repair must have a Return Authorization (R/A) Number. To get an R/A Number, please call the Furman Service Department, (707) 763-1010 ext. Please display your R/A Number prominently on the front of all packages. Also Available: Furman IT-1220 and IT-1210 Balanced AC Power Isolation Transformers For other installations and applications requiring ultra-lownoise performance, consider the Furman IT-1220 and IT-1210. [. . . ]