Furman Sound Thermostat AR 15 User Manual

AR-15  
AC LINE VOLTAGE REGULATOR  
AND  
POWER CONDITIONER  
VOLTAGE  
REGULATORS  
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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER  
5. Clean theAR-15 with a damp cloth only. Do not voltage, plus or minus five volts. Voltages ap-  
use solvents or abrasive cleaners. Never pour  
any liquid on or into the unit.  
proximately ±10% beyond that range may be  
converted to usable levels, depending on the  
requirements of the equipment. This stable  
voltage protects equipment and allows optimal  
performance. See graphs on the back page.  
6. When left unused for a long period of time,  
the power cord of the AR-15 should be un-  
plugged from the outlet.  
The AR-15 has eight outlets on the rear panel,  
and one convenience outlet on the front panel.  
All are functionally interchangeable. The outlets  
are regulated, surge-suppressed, and linearly  
filtered, making the unit a full-function power  
conditioner. The AR-15 has no controls except  
an on-off switch and the switch for the optional  
rear rack light.  
7. The AR-15 should be serviced by qualified  
service personnel when:  
a. The power supply cord or the plug has  
been frayed, kinked, or cut.  
b. Objects have fallen or liquid has spilled  
into the unit.  
c. The AR-15 has been exposed to rain or  
other moisture.  
d. The AR-15 does not appear to operate  
normally or exhibits a marked change in  
performance.  
e. The AR-15 has been dropped, or the  
enclosure damaged.  
Note: The AR-15 is for use with AC voltage  
only. DC voltages should never be applied to  
them. Also, it does not change or regulate line  
frequency. The output frequency will always be  
the same as the incoming frequency.  
8. The AR-15 requires that a safety ground be  
present for proper operation. Any attempt to  
operate the AR-15 without a safety ground  
is considered improper operation and could  
invalidate the warranty.  
SMP+ (series mode protection plus)  
Traditional surge suppression rely on circuits  
that “sacrifice” themselves when exposed to  
multiple transient voltage spikes, requiring the  
dismantling of your system, and repair of your  
surge suppressor. Not so with SMP+. With  
Furman’s SMP+, damaging transient voltages  
are safely absorbed, clamped, and dissipated.  
No sacrificed parts, no service calls, no down  
time.  
9. There are no user serviceable parts in the  
AR-15. Refer servicing to qualified service  
personnel only.  
Voltage Regulation  
Furman Voltage Regulators are intended to  
protect sensitive electronic equipment from  
problems caused by AC line voltage irregu-  
larities—brownouts or overvoltages that can  
cause audio tonal changes, digital equipment  
malfunction (such as loss of MIDI programs or  
other data), or, in extreme cases, permanent  
damage. They accept input voltages over a  
wide AC voltage range and convert them to a  
steady, stable output at the desired standard  
Unique to Furman’s SMP+ is its unparalleled  
clamping voltage. While other designs offer  
clamping voltages that are well above 330 Vpk,  
Furman’s SMP+ clamps at 188 Vpk, (133 VAC  
RMS). This unprecedented level of protection  
is only available with Furman’s SMP+ technol-  
ogy. Additionally, Furman’s trusted over-volt-  
age circuitry protects against all too frequent  
2
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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER  
accidental connections to 208 or 240 VAC, by  
shutting off the incoming power until the over  
voltage condition is corrected.  
NOTE: If the mains power is above the high  
cutoff voltage and has caused the unit to  
remove power from its outlets, it cannot restore  
power without the operator manually turning  
the unit off, then on again. Avoid turning the  
unit back on, without first checking the source  
of the problem, and perhaps changing the AC  
LiFT (Linear Filtering Technology)  
Unfortunately, traditional AC filter - condition-  
ers have been designed for unrealistic labora-  
tory conditions. Prior technologies, whether  
multiple pole filter or conventional series  
source.  
Protection OK Indicator  
mode, could actually harm audio and video  
performance more than they help, due to the  
resonant peaking of their antiquated, non-lin-  
ear designs. Under certain conditions, these  
designs can actually add more than 10 dB of  
noise to the incoming AC line! Furman’s SMP+  
with LiFT takes another approach, ensuring  
optimal performance through linear filtering  
and no leakage to ground. With this exclusive  
filtration technology, all connected equipment  
will be free of noise and contamination and will  
operate at optimum performance levels.  
Although the Furman SMP+ circuit assures  
virtually protection from transient voltage  
spikes and surges, nature has a way of  
occasionally creating electrical forces that are  
beyond the capabilities of any TVSS device to  
absorb without some degree of damage. In  
the rare instance that this occurs, the green  
“Protection OK” LED indicator located on your  
front panel will dim. If this happens some level  
of protection from voltage surges will remain,  
but the Furman’s clamping voltage rating will  
be compromised. The unit must be returned  
to Furman Sound, or an authorized Furman  
Service center for repair.  
Extreme Voltage Shutdown Indicator  
This LED is normally off. It monitors a hazard  
common in the entertainment industry: wiring  
faults – for example, accidental connection  
to 220VAC where 120VAC is expected, or an  
open neutral from a 208 or 240VAC feed. The  
Series II SMP+ circuit senses voltages that  
are so high that operation would be impossible  
and shuts the power down before damage  
can occur. Upon initially applying power to  
these units, the Extreme Voltage indicator  
LED will light if the input voltage is above the  
extreme voltage cutoff, and power will not be  
applied to the unit’s outlets. If the unit has been  
operating with an acceptable input voltage  
and subsequently that voltage exceeds 145-  
150V, it will shut off power to the outlet and the  
Extreme Voltage LED will light.  
FUSES AND CIRCUIT BREAKERS  
There is one fuse and one circuit breaker in the  
AR-Series. In the event that the unit appears to  
be completely dead (neither the Power switch  
nor any LED’s light up), unplug the power cord  
and the load and check the breaker. If the cir-  
cuit breaker is tripped, a white button will pop  
up. Push it back in to reset it. The purposes of  
these circuit protection devices are:  
1. A fast-blow 15 amp circuit breaker is acces-  
sible at the rear panel without removing the  
unit from the rack. This breaker will trip if the  
unit’s 15 amp capacity is exceeded at any  
time.  
2. A fast-blow 1/4 amp fuse is located inside  
3
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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER  
the unit. This fuse will blow if the unit has  
been connected to a voltage that is above  
the range of the Extreme Voltage Shut-  
down circuitry. To replace it, the unit must  
be completely disconnected from all power  
and removed from its rack. The six hex head  
screws and two Phillips head screws holding  
the top cover must be removed. The internal  
fuse is located in a holder on the printed circuit  
board. Replace the fuse only with the exact  
same type (1/4 fast blow).  
that the other equipment will be disrupted by  
leakage of a strong 50/60 Hz magnetic field.  
Nevertheless, suggested rack locations would  
be either at the top or bottom.  
As with any rackmount equipment, be sure to  
use 10-32 machine screws for mounting in the  
rack’s tapped holes (this is not a metric size).  
In particular, beware of 10-24 screws, which  
may fit if forced but which will strip the threads.  
To avoid marring the front panel finish, use  
plastic washers under the screw heads.  
INPUT VOLTAGE MONITORING  
DESIGN  
The row of ten LED’s at the left of the front  
panel make up a meter that indicates INPUT  
VOLTAGE. Only one LED will light up at a time.  
There are two red LED’s at the endpoints. When  
lit, they indicate that the input voltage may  
be above or below the point where it can be  
restored to the selected nominal output volt-  
age (though it may still be restored to a usable  
level) but is not high or low enough to cause an  
extreme voltage shutdown.  
The AR-Series uses a design based on an  
eight-tap toroidal autoformer. The toroidal de-  
sign assures minimal leakage of stray magnetic  
fields, and, because of its high efficiency, a very  
compact size for its rating. The Voltage Regula-  
tor’s circuitry monitors the incoming line voltage  
with each cycle, comparing it to an extremely  
precise voltage reference, accurate to ±0.15%.  
If a voltage fluctuation requires that a different  
tap be selected, the new tap is electronically  
switched exactly at the zero-crossing, to avoid  
distorting the AC waveform. If necessary, it can  
switch taps as often as once each cycle. Most  
commercial voltage regulators using multiple-  
tapped transformers switch taps at uncontrolled  
times, thereby creating voltage spikes and  
clicks that can leak into the audio! Hysteresis in  
the switching circuits avoids “chatter” or unnec-  
essary switching back and forth between adja-  
cent taps. Unlike those voltage regulators that  
employ ferro-resonant transformers, Furman  
Voltage Regulators are not sensitive to small  
errors in line frequency, making them ideal for  
use with generators.  
OUTPUT VOLTAGE MONITORING  
A green LED labelled OUTPUT IN REGULATION  
indicates proper function (i.e., that the output volt-  
age is within ±5V of the selected output voltage).  
Your equipment will always work normally when  
this light is on, and often will work satisfactorily  
even when it is off.  
The AR-15 offers a 10-LED bargraph line voltage  
meter to monitor the incoming line (the Voltage  
Regulator output).  
INSTALLATION  
Because of their toroidal transformer design,  
Furman Voltage Regulators may be posi-  
tioned near most other equipment without fear  
MAXIMUM AND MINIMUM LOAD  
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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER  
The AR-15 can handle loads totalling up to 15  
amperes as long as the input voltage is equal  
to or above 124 volts. For voltages below that  
level, its capacity must be derated at approxi-  
mately 113 milliamperes per volt. (See graphs  
volts. Though they are usually of very short du-  
ration, the energy they contain can be consid-  
erable, enough to damage sensitive solid-state  
components in audio and computer equipment.  
Spikes can also foul switch contacts and de-  
on back page.) As a practical matter, therefore, grade wiring insulation. They are an unavoid-  
to cope successfully with worst-case brown-  
out conditions, you should plan your total load  
so that it does not exceed 12 amps, or 1400  
watts. Please note that this refers to the ag-  
gregate power requirement of all equipment  
able component of electric power. They are  
caused unpredictably by electric motors switch-  
ing on or off (on the premises or outside), utility  
company maintenance operations, nearby  
lightning strikes, and other factors. Spikes (also  
plugged into the Voltage Regulator, not to each called surges or transients) are absorbed by  
individual item.  
special components called MOV’s in the AR-  
series to provide safe voltage levels to protect  
your equipment.  
NOTE: While there is no minimum load require-  
ment for the AR-15 you may experience an  
audible mechanical hum coming directly from the  
unit when the POWER switch is on with nothing  
plugged in. This effect will sometimes disappear  
RFI/EMI INTERFERENCE: Noise from RFI  
(Radio Frequency Interference) or EMI (Electro  
Magnetic Interference) involves lower voltages  
as soon as you plug in any equipment drawing 40 and less energy than is found in spikes, but it is  
to 50 watts total.  
continuous rather than transient in nature. It is  
not likely to cause physical damage, but it can  
certainly be annoying, producing static in audio  
circuits, “snow” on video screens, or garbled  
data in computers. Noise can be introduced into  
AC lines by nearby radio transmitters, certain  
kinds of lighting, electric motors, and others.  
Because noise occurs at higher frequencies  
than the 50 or 60 Hz AC line, it can be effective-  
ly reduced through use of low-pass filtering.  
DEFINITIONS  
VOLTAGE REGULATION: The AC line voltage  
is a number indicating the nominal electrical  
potential that has been adopted in a region  
for powering electrical equipment of all kinds.  
In most of North America it is 117 volts AC; in  
Japan, 100 volts; and in many other countries  
220, 230, or 240 volts. The actual voltage can  
fall below or rise above this nominal level due  
to brownouts, power cutbacks, use of substan-  
dard wiring, and other causes. These devia-  
tions can cause poor performance or a mal-  
function. A regulator is a device which, through  
use of a transformer, corrects the voltage  
deviation by stepping it up or down so that it is  
as close as possible to the nominal level.  
THREE-YEAR LIMITED WARRANTY  
Furman Sound, Inc., having its principal place  
of business at 1997 South McDowell Blvd.,  
Petaluma, CA 94954 (“Manufacturer”) warrants  
its AR-15 (the “Product”) as follows:  
Manufacturer warrants to the original Purchaser  
of the Product that the Product sold hereunder  
will be free from defects in material and work-  
manship for a period of three years from the  
SPIKE: A pulse of energy on the power line.  
Spikes can have voltages as high as 6000  
5
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AR-15 VOLTAGE REGULATOR / POWER CONDITIONER  
date of purchase. The Purchaser of the product  
zation from Furman Sound. This warranty also  
is allowed fifteen days from the date of purchase does not apply to Products upon which repairs  
to complete warranty registration by mail or on-  
line at the Furman website. If the Product does  
not conform to this Limited Warranty during the  
warranty period (as herein above specified),  
Purchaser shall notify Manufacturer in writing of  
the claimed defects. If the defects are of such  
type and nature as to be covered by this war-  
ranty, Manufacturer shall authorize Purchaser  
to return the Product to the Furman factory or to  
an authorized Furman repair location. Warranty  
claims should be accompanied by a copy of the  
original purchase invoice showing the purchase  
date; this is not necessary if the Warranty Regis-  
tration was completed either via the mailed in  
warranty card or on-line website registration.  
Shipping charges to the Furman factory or to  
an authorized repair location must be prepaid  
by the Purchaser of the product. Manufacturer  
shall, at its own expense, furnish a replacement  
Product or, at Manufacturer’s option, repair the  
defective Product. Return shipping charges  
back to Purchaser will be paid by Manufacturer.  
have been affected or attempted by persons  
other than pursuant to written authorization by  
Manufacturer.  
THIS WARRANTY IS EXCLUSIVE. The sole  
and exclusive obligation of Manufacturer shall  
be to repair or replace the defective Product in  
the manner and for the period provided above.  
Manufacturer shall not have any other obligation  
with respect to the Products or any part thereof,  
whether based on contract, tort, strict liability or  
otherwise. Under no circumstances, whether  
based on this Limited Warranty or otherwise,  
shall Manufacturer be liable for incidental,  
special, or consequential damages. Manufac-  
turer’s employees or representatives’ ORAL OR  
OTHER WRITTEN STATEMENTS DO NOT  
CONSTITUTE WARRANTIES, shall not be  
relied upon by Purchaser, and are not a part of  
the contract for sale or this limited warranty. This  
Limited Warranty states the entire obligation of  
Manufacturer with respect to the Product. If any  
part of this Limited Warranty is determined to be  
void or illegal, the remainder shall remain in full  
force and effect.  
THE FOREGOING IS IN LIEU OF ALL OTHER  
WARRANTIES, EXPRESS OR IMPLIED,  
INCLUDING BUT NOT LIMITED TO THE IM-  
PLIED WARRANTIES OF MERCHANTABILITY  
AND FITNESS FOR A PARTICULAR PUR-  
POSE. Manufacturer does not warrant against  
damages or defects arising out of improper  
or abnormal use of handling of the Product;  
against defects or damages arising from im-  
proper installation, against defects in products  
or components not manufactured by Manufac-  
turer, or against damages resulting from such  
non-Manufacturer made products or compo-  
nents. This warranty shall be cancelable by  
Manufacturer at its sole discretion if the product  
is modified in any way without written authori-  
6
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SERVICE  
Before returning any equipment for repair,  
please be sure that it is adequately packed  
and cushioned against damage in shipment,  
and that it is insured. We suggest that you  
save the original packaging and use it to  
ship the product for servicing. 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  
(RA) Number. To get an RA Number, please  
call the Furman Service Department, (707)  
763-1010, ext. 120 or 121, between 8 a.m.  
and 5 p.m. U.S. Pacific Time, or fax to (707)  
763-1310. Please display your RA Number  
prominently on the front of all packages.  
10 dB @ 10 kHz  
40 dB @ 100 kHz  
SPECIFICATIONS  
100 dB @ 10 MHz  
Spike Protection Modes:  
Linear attenuation curve from 0.05 - 100 ohms line impedance  
Line to neutral, zero ground leakage  
Shutdown Range:  
Spike Clamping Voltage:  
Above 145 - 150VAC typically  
188 Vpk @ 3,000 amps, 133 VAC RMS  
(tested to UL-1449 6,000 Vpk @ 3,000 amps)  
Dimensions:  
Response time:  
19 “ W x 11.63D x 1.75H  
(48.26 x 29.54 x 4.45 cm)  
1 nanosecond  
Weight:  
Maximum surge current:  
14.5 lbs. (6.58 kg)  
6,500 amps  
Current Rating:  
Voltmeter Accuracy:  
The AR-15 II is capable of 15 amps for input voltages  
of 124V (104V in 100V mode) or higher; derate at 113  
mA per volt to a minimum of 12:3A  
±5V  
“In Regulation” Ranges:  
Three Year Limited Warranty:  
AR-15 II: Provides regulation ±5V in 120V mode from  
97 to 141V  
The AR-15 is protected by a limited three-year warranty covering defects  
in materials and workmanship.  
Noise attenuation:  
Furman Sound, Inc. • 1997 South McDowell Blvd. • Petaluma, CA 94954-6919 USA  
Made in China  
12/17/04-C  
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