Furman IT-REFERENCE 20i Owner's Manual page 8

IT-R 20 O ' M
efeRence wneR s anual
i
Testing the IT-Reference 20i's GFCI once a year is recommended. Simply press the button marked "GFI TEST". If the GFCI is
functioning properly, this will cause the main circuit breaker/power switch to trip and cut off power. After verifying the GFCI's
proper operation, simply restore power by switching the Circuit Breaker/Power Switch to the ON position.
AC Transient Voltage Surge Suppression
The IT-Reference 20i is capable of suppressing virtually any instantaneous voltage surge from lightning or commercial power
companies. This is due in part to the mammoth reactive elements in the IT-Reference 20i's AC Power Factor Technology circuitry.
Further, the circuit is not easily damaged by huge instantaneous peaks of voltage, so there are no parts to fix or replace after
a transient voltage surge incident. It should be noted, however, that there is no continuous over-under voltage circuitry or
regulation within the design. For the IT-Reference 20i's intended user, these features are typically not necessary. If your specific
application requires AC regulation, over-under voltage power shut-down, or sequenced power distribution, there is a full line of
Furman products to meet these requirements.
Telco – Satellite – Cable Transient Voltage Surge Suppressors
The IT-Reference 20i features transient voltage surge suppression for both standard telephone lines, as well as cable or satellite
lines utilizing standard coaxial connectors. As these surge suppressors are in-line, they will require an additional cable to
connect from their output to the control device requiring protection.
All in-line surge suppressors feature our exclusive ground contamination free technology. This aids in eliminating audio buzzing,
and the video hum-bars that can result from typical in-line suppressors. Further, our cable and satellite suppressors are TiVO
®
- DVR friendly as well as HD digital television ready. Both DC carrier signals as well as high bandwidth signals can pass through
our circuit. In fact the bandwidth is less than 0.1dB loss at 1GHz!
To connect your cabling to these in-line protectors, simply follow the in and out indications marked next to the Telco, Cable and
Satellite connectors.
Note: It is not possible to make an in-line telco protector "virtually maintenance-free" (non-sacrificial) as we have accomplished with
the 120 VAC line. This would necessitate limited signal bandwidth that would not allow the signal to pass. Under extreme conditions,
it is possible that the surge suppression in one of these devices could sacrifice itself after a catastrophic event. If the telephone will
no longer pass through our protector, please contact your local service representative, installer or Furman for servicing. Since these
circuits are modular, replacement may be accomplished in seconds with a new telco TVSS module. To test this, simply disconnect the
incoming and out going cable from the IT-Reference 20i. Connect the incoming connector to the component that formerly received the
out going connector, thus by-passing the in-line protection. If the signal is present (but not when used with the IT-Reference 20i) then
the protection circuit is damaged (assuming it worked properly before a storm or catastrophic event).