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adjacent to sensitive, low level signal processors, especially mic preamps,
mixers, tape recorders, etc. Power amps may be more suitable "rack neighbors."
The maximum benefit is derived from balanced power when ALL equipment in an
installation is powered with it. Therefore, try to position the IT-1220 in a central
location so its power can be easily distributed everywhere it's needed. If the total
power consumption of all equipment exceeds 20 amps at 120 volts, delete high
level or mechanical devices first (such as power amps, motors). If possible,
physically isolate any such equipment that has to be powered with conventional
power through a different circuit, and route their AC cords away from all other'
cabling. The balanced power produced by the IT-1 220 is restricted to use with
electronic equipment only. Balanced power may not be used for lighting
equipment, and access must be limited to use by qualified personnel only.
If you are installing the IT-1220 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-1220 to be securely attached both in front and in back. Order model RRM-
2.
Operation
Circuit Breaker/Switch: The IT-1220 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 current drawn
through the IT-1220 exceeds 20 amps. If this occurs, reduce the load by
unplugging some equipment, and then flip the switch back to the "on" position.
Soft Start / Outlets On/Off Indicator: When power is first applied to the IT-
1220, the Soft Start feature is activated, indicated by a steady yellow color. Soft
Start limits the inrush current to theIT-1220's transformer, which would otherwise
be excessive. The result is that the IT-1220'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.
If the power at the IT-1220's outlets goes 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- 1220 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-1 220, 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-
1220'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-1220 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 /T- 1220 to
remove power from its outlets, the IT- 1220 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 /T- 1220 to remove power from its outlets, the /T- 1220
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