Furman IT-REFERENCE 20i Owner'S Manual Download

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connector. Watt ratings are simply added to determine the total system RMS current draw. It should also be noted that the
IT-Reference 20i’s Power Factor Technology circuitry has no actual effect on the power drawn from your utilities’ power meter.
The IT-Reference 20i draws a mere 8.5 Watts independent of other components, so it may be left on at all times.

Suggested AC Connection

Soft Start - Continuous Use and Break-In Time

When power is first applied to the IT-Reference 20i, (the front panel breaker-power toggle must be switched to the “on”
position) the Soft Start feature is activated.  There is an audible “clack” when the IT-Reference is first turned on or off.  This
sound is produced by the Soft Start circuit’s 30 Amp relay engaging or disengaging.  There is nothing in the IT-Reference
20i’s construction, design, or componentry to wear over the life time of the product, and there is no power draw from your
electric service meter aside from the LED power indicator, relay, and GFCI protection circuit. For this reason the IT-Reference
20i may be left with its power engaged permanently at a cost of pennies per month. This is an added benefit, as many audio/
videophiles find performance improves significantly when leaving low-powered components permanently charged (turned
on).  This is true of the IT-Reference 20i.  Though it will function flawlessly right from its shipping carton, the performance of its
circuit parts will improve after approximately two weeks of continuous use or “break-in.”

Ground Fault Interrupter (GFCI)

The IT-Reference 20i’s “Discrete Symmetrical Filtered AC outlets” incorporate symmetrical AC power output, whereby both the
neutral and positive leads of the AC cable run at 60 Volts AC in opposing polarity, referenced to ground (0 Volts AC). This is
but one of the IT-Reference 20i’s advantages over other AC-filter/protection designs.

Though virtually all domestically produced electronic equipment is designed to detect electrical shorts and other potentially
dangerous equipment problems in the Line lead referenced to its Neutral, this is inadequate when power is symmetrical.  With
the IT-Reference 20i, both neutral and positive legs contain 60 VAC relative to their Ground tab.  This is not a problem or safety
hazard, unless there is a defect in either the IT-Reference 20i’s transformer, or the power supply of a connected component.  In
this instance, we need to assure that safety is always maintained.  The solution is our GFCI (ground fault circuit interrupter).

The Furman GFCI detects any imbalance in the current flowing in the two hot legs. The missing current is presumed to be
flowing through the ground conductor (the round pin on an AC outlet).  Ground current often indicates a dangerous partial
or full short circuit.  If an imbalance is detected, the GFCI will trip the main circuit breaker/power switch.  To restore operation,
correct the fault and turn the unit on again. 5 mA of current is enough to cause the GFCI to trip; to troubleshoot this type
of problem, start with nothing connected to the IT-Reference 20i.  Then, add each piece of equipment until the GFCI trips.
Contact the manufacturer of the suspect unit for possible solutions.

Telco Protectors (x2)

AC Cord

Cable / Satellite

Protectors (x3)

Powered

Subwoofer

Plasma/LCD

Monitor/Projector

Turntable

2 - 7
Channel
Amplifier

VCR
or DVR

DVD/
HD-DVD/
Blu-Ray Player