TWR Lighting D-1LVS-24V DC User manual

M.2007 Manuals.D-1LVS-24V DC
09/14/07
4300 WINDFERN RD., SUITE 100 - HOUSTON TX. 77041-8943
VOICE [phone] - FAX [phone]
web: www.twrlighting.com
IMPORTANT!!!
PLEASE TAKE THE TIME TO FILL OUT THE FORM COMPLETELY. FILE IT
IN A SAFE PLACE. IN THE EVENT YOU EXPERIENCE PROBLEMS WITH OR
HAVE QUESTIONS CONCERNING YOUR CONTROLLER, THE FOLLOWING
INFORMATION IS NECESSARY TO OBTAIN PROPER SERVICE AND PARTS.
MODEL # D-1LVS-24V DC
SERIAL #
PURCHASE DATE
PURCHASED FROM

D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
09/14/07
TABLE OF CONTENTS
1.0 INTRODUCTION..........................................................................................................................1
1.1 APPLICATION.................................................................................................................1
1.2 SPECIFICATIONS OF EQUIPMENT...........................................................................1
2.0 INSTALLATION...........................................................................................................................2
2.1 POWER SUPPLY CONTROL CABINET MOUNTING.............................................2
2.2 PHOTOCELL HOUSING ...............................................................................................2
2.3 PHOTOCELL WIRING ..................................................................................................2
2.4 POWER WIRING ............................................................................................................3
2.5 TOWER LIGHTING KIT ...............................................................................................3
2.5.1 Beacon Mounting.................................................................................................3
2.5.2 Lighting Kit Wiring.............................................................................................4
2.6 ALARM WIRING ............................................................................................................4
2.6.1 Alarm testing........................................................................................................4
2.6.2 Strobe Failure (SF) ..............................................................................................4
2.6.3 Power Failure (PF)...............................................................................................4
2.6.4 Photocell (PC).......................................................................................................4
3.0 THEORY OF OPERATION.........................................................................................................5
3.1 THE POWER SUPPLY ...................................................................................................5
3.2 THE FLASHTUBE...........................................................................................................5
3.3 TIMING CIRCUIT...........................................................................................................6
3.4 TRIGGER CIRCUIT .......................................................................................................6
3.5 ALARM CIRCUITS.........................................................................................................6
3.5.1 Strobe Failure (SF) ..............................................................................................6
3.5.2 Photocell (PC).......................................................................................................6
3.6 BLEEDER CIRCUIT.......................................................................................................6
3.7 DIAGNOSTIC LEDs........................................................................................................7
4.0 TROUBLESHOOTING ................................................................................................................8
4.1 TOOL REQUIREMENTS...............................................................................................8
4.2 DIAGNOSTIC EVALUATION.......................................................................................8
4.3 TROUBLE SHOOTING ASSISTANCE ........................................................................9
4.3.1 Flash Verify LED - Out.......................................................................................9
4.3.2 Control Power On LED - Out.............................................................................9
4.3.3 Primary Timing LED Out...................................................................................9
4.3.4 False or Nonexistent Beacon Alarms..................................................................9

D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
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5.0 MAINTENANCE GUIDE...........................................................................................................10
5.1 FLASHTUBE REPLACEMENT ..................................................................................10
5.2 POWER SUPPLY...........................................................................................................10
5.3 PHOTOCELL.................................................................................................................10
6.0 MAJOR COMPONENTS PARTS LIST...................................................................................11
7.0 RECOMMENDED SPARE PARTS LIST ................................................................................13
WARRANTY & RETURN POLICY
RETURN MATERIAL AUTHORIZATION (RMA) FORM

D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
09/14/07
APPENDIX
Chassis Layout ......................................................................................... H40-293 (REV D)
Wiring Diagram ...................................................................................... M01-293 (REV A)
Housing Details D-1LVS–24V DC ........................................................ HD0-293 (REV B)
Installation Guideline ............................................................................... INS-293 (REV A)
Photocell Housing Detail ........................................................................... 100239 (REV A)
Tower Lighting Kit - Cable ........................................................................ 500-15 (REV B)
Control PCB #1 ........................................................................................ H01-293 (REV A)
Relay PCB #3 ........................................................................................... H03-226 (REV B)
Power Supply Detail ………………………………………………………….……..100529
Strobe Beacon Detail ................................................................................. 100325 (REV B)

D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
09/14/07
1.0 INTRODUCTION
The TWR Lighting, Inc. (TWR) Model D-1LVS-24V DC Type L-865 Controller has been designed
and built to the Federal Aviation Adm inistration’s (FAA) Advisory Circular 150/5345-43E with
safety and reliability in mind. TWR is committed to providing our customers with some of the best
products and services available. TWR welcom es you to our family of fine product, and we look
forward to servicing your needs now and in the future.
1.1 APPLICATION
The D-1LVS-24V DC L-865 Controller is for use on lighting structures or towers that are
approved to be lighted with Medium Inte nsity Strobes in accordance with the FAA’ s
Advisory Circular 70/7460-1K. Structures from 201' to 350' may be lighted with Medium
Intensity lights.
1.2 SPECIFICATIONS OF EQUIPMENT
Dimensions:
Controller (HxWxD)/Weight 18.0"x16.0"x9.25" 31 lbs.
Mounting Dim (HxW) 18.74"x12"
Beacon Height/Weight 17.25" 21 lbs.
Cable Diameter/Weight Per 100 ft. .625" +/- 10% 24 lbs.
Electrical 24V DC
Intensity:
Daymode 20,000 +/- 25% Effective Candelas
Nightmode 2,000 +/- 25% Effective Candelas
Beamspread:
Horizontal 360 °
Vertical 3 ° minimum
Flash Rate:
Daymode 40 fpm +/- 2 fpm
Nightmode 40 fpm +/- 2 fpm
Wattage:
Daymode 95 Watts
Nightmode 35 Watts
Temperature: +55 °C / -55°C
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M.2007 Manuals.D-1LVS-24V DC
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2.0 INSTALLATION WARNING DANGER
THIS SYSTEM OPERATES AT HIGH VOLTAGE LEVELS THAT COULD BE LETHAL
TO SERVICE PERSONEL. ALL INSTALLATION MAINTENANCE WORK SHOULD BE
DONE BY QUALIFIED SERVICE PERSONEL ONLY. WHEN PERSONNEL ARE
INSTALLINGSYSTEMOR PERFORMINGMAINTENANCE ON THISSYSTEM, MAKE
SURE THE POWER IS TURNED OFF AT THE SERVICE BREAKER PANEL!!
READ AND UNDERSTAND THE THEORY OF OPERATIONS AND ITS SAFETY
MESSAGES BEFORE ATTEMPTING INSTALLATION / MAINTENANCE OF THIS
SYSTEM. DO NOT ATTEMPT TO DEFEAT THE INTERNAL SAFETY SWITCHES IN
THE CONTROLLER AND BEACON.
2.1 POWER SUPPLY CONTROL CABINET MOUNTING
The power supply control cabinet can be located at the base of the structure, or in an equipment
building. Mounting Dim ensions can be found in Section 1.2, on page 1. Pay particular
attention when choosing your controller mounting location to ensure proper door opening and
room for service personnel. Refer to installation drawing HDO-293 for ease of installation.
2.2 PHOTOCELL HOUSING
The standard photocell housing is supplied with a 20' pigtail of 16 AWG Type TFFN wire. On
occasion, in mounting of the photocell, an additional amount of wire may be required. Refer to
drawing 100239 for proper assistance on determining gauge of wire for your specific needs.
2.3 PHOTOCELL WIRING
(Refer to Drawings HD0-293 and H40-293)
If the control cabinet is m ounted inside an equipm ent building, the photocell should be
mounted vertically on ½” conduit outside the building above the eaves facing north. Wiring
from the photocell housing socket to the control cabinet should consist of one (1) each; red,
black, and blue wires. The black wire is connected to the socket terminal marked “N,” the
blue wire is connected to the socket terminal marked “L,” and the red wire is connected to
the socket terminal marked “LO.” The phot ocell should be positioned so that it does not
“see” ambient light, which would prevent it from switching to the nightmode.
If the control cabinet is m ounted outside an equipm ent building, the photocell should be
mounted vertically on ½” conduit so the photocell is above the control cabinet. Care must be
taken to ensure that the photocell does not “see” any ambient light that would prevent it from
switching into the nightmode. The photocell housing socket wiring is the same as above.
2.3.1 Connect the BLUE wire from the photocell to TB1-8.
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2.3.2 Connect the RED wire from the photocell to TB1-6.
2.3.3 Connect the BLACK wire from the photocell to TB1-7.
2.3.4 Install the photocell into the receptacl e and twist to the right while depressing to
lock into place.
NOTE: Wheninstallingmultiple controllerstogether,the photocellisonly requiredon
one (1) unit. It can be installed on the master or slave. SSR interconnect wire must be
common to all units. D2/3LV SSR TB3-2 / D-1LVS-24V DC SSR TB1-6.
2.4 POWER WIRING
(Refer to Drawing H40-293)
Power wiring to the control cabinet should be in accordance with local m ethods and the
National Electric Code (NEC).
2.4.1 A 24V DC power supply is required to power the controller.
2.4.2 Connect the “HOT” side of the 24V DC line to TB1-9.
2.4.3 Connect the “GROUND” side of the 24V DC line to TB1-10.
2.4.4 Controller panel should be connected to tower and/or building-grounding system
with the exception of installations on AM/RF Applications where controller
grounding to earth ground is prohibited. Ground the controller only to the tower
itself using a suitable RF ground.
2.5 TOWER LIGHTING KIT
When installing this system, the customer will need to use strobe cable wiring m ethod to
wire the strobe beacons. Refer to Lighting Kit Drawing 500-15 for cable installation.
2.5.1 Beacon Mounting
(Refer to Drawing HDO-293)
2.5.1.1 Bolt the beacon to the m ounting plate using four 5/8" x 1 1/2"
galvanized bolts that are supplied. Installer should make sure to check
for full thread engagement on Anco locknut. Allow 18" clearance in
back of the hinge (25" from the center of the base) to tilt lens back
without hitting an obstruction.
2.5.1.2 Level the beacon using the level at the base of the lens. Shims may be used
under beacon base or triple nutting each bolt with palnuts on all four (4)
nuts.
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2.5.2 Lighting Kit Wiring
Install wiring between the controller and the beacon, utilizing strobe cable method.
(TWR LIGHTING CANNOT WARRANTY SYSTEMS THAT
EMPLOYSPLICING CABLE.) Refer to drawings HDO-293, and 500-15 for
install of lighting kits. Follow these minimum guidelines as well as any local or end
user addition requirements. Installing lighting kits will require lifting of the cable
by the supplied cable grip or conduit to affix to the tower. Always work safely and
adhere to all OSHA Safety Guidelines when lifting wiring or working on the
structure or tower itself. It is the installer’s responsibility to install the lighting kit in
a safe m anner. Installers can request from OSHA their requirem ents 29CFT
1926.21, and 29CFR 1926.105, to ensure compliance to regulations.
NOTE:On occasion a set of custom lighting kit drawings may be specifically requested by a
customer and installed in this manual. In cases such as this, the drawings will precede the manual
if a conflict occurs.
2.6 ALARM WIRING
Individual alarm contacts (Form C) are provided for strobe failure, power failure and
photocell on. It is left up to the customer or installer on how they choose to utilize these
contacts with their monitoring equipment. Alarm configurations are shown on drawing H40-
293.
2.6.1 Alarm testing
To test alarm s, follow these procedures using an “ohm” meter between alarm
common and alarm points.
2.6.2 Strobe Failure (SF)
Strobe failure testing can be performed in either day or nightmode strobe operation.
Check for status of strobe beacon. Turn on switch S1 on PCB #1, and status should
change after an eight (8) second delay . After test, switch S1 to norm al operating
position.
2.6.3 Power Failure (PF)
While the controller is in normal operation, shut off power to the controller at the
breaker panel. Alarm should be prompt. Reset breaker to resume normal operation.
2.6.4 Photocell (PC)
Controller should be in the daymode of operation when performing this test. Check
status of operation. Turn SW3 on or c over the photocell and alarm status should
change state. After test turn SW3 to normal operating position.
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3.0 THEORY OF OPERATION
3.1 THE POWER SUPPLY
The 24V DC is connected to power converter through F1 and Relay K1. In order for K1 to
energize and complete the circuit to the power converter, the safety interlock switches CSS
and BSS must be closed. The BSS switch is located in the base of the beacon. For the safety
reason, both beacon and power supply m ust be closed and secured to have the sy stem
operate.
The HV output of the power converter sends 1,000V DC to the day capacitor bank. The
energy is stored there and discharged to the flashtube upon the trigger pulses. In the
nightmode, Relay K5 is energized, which inserts R31 and bursting choke between the day
capacitor bank and night capacitor, so a small portion of the energy that stored in night
capacitor is discharged to the flashtube.
3.2 THE FLASHTUBE
The flashtube FT is a quartz tube containing two (2) electrodes each. The electrode at the
positive (+) end is called the Anode and is c onnected to the positive side of the storage
capacitors through inductor L1. The electrode at the negative (-) end of the tube is called the
Cathode and is connected to the negative side of the energy storage capacitors banks.
The flashtube contains a gas called Xenon. Wh en the high voltage energy in the storage
capacitors is connected to the flashtube, nothing will happen since Xenon in its natural state
is not a conductor of electricity. However, when a very short duration high voltage pulse is
impressed on the trigger element of the tube (via the power supply and trigger transformer
T4) the Xenon gas is ionized and thereby becomes a good conductor of electricity. This
allows the electrical energy in the storage capacitors to discharge rapidly through the
flashtube, which converts this energy to light energy and heat energy. When the voltage
stored in the capacitors discharges to a low level the Xenon gas can no longer sustain
conduction and since the short trigger pulse is gone by this time, it deionizes returning to its
non-conducting state until another trigger pulse arrives to repeat the process. Meanwhile, the
storage capacitor is being recharged by the transformer and the high voltage rectifier.
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3.3 TIMING CIRCUIT
The timing circuit is contained entirely on PCB #1, and has its own power supply . This
circuit converts the 24V DC to approxim ately 12V DC, which is used to supply all of the
components in this circuit. It uses this low voltage DC to generate pulses that control the
flash rate of the flashtube. It actually generates two (2) groups of pulses. The first is a pulse
approximately once every 1.4 seconds to operate the flashtube during the day light hours.
The second is a burst of 10 or more very rapid pulses (to elongate the apparent flash) every
flash to operate the flashtube during the nighttime hours at reduced flash energy.
3.4 TRIGGER CIRCUIT
The trigger circuit consists of two (2) m ain com ponents, electronic switch and trigger
capacitor. The trigger capacitor is charged by a 300V DC output of the power converter. The
energy is stored in trigger capacitor m uch like the action of the high voltage circuit. The
main difference is that the storage capacitor is much smaller. When the electronic switch of
the trigger circuit receives a pulse from the timing circuit, it switches on and releases the
stored energy in the trigger capacitor and delivers to trigger transformer to initiate a flash.
3.5 ALARM CIRCUITS
3.5.1 Strobe Failure (SF)
Strobe Failure alarm circuit monitors each flash of the flashtube within each beacon.
If the flashtube fails to flash (for any reason), the alarm circuit operates a relay (on
PCB #1) that the customer can connect to their alarm transmitting devices. The
alarm point can be accessed on J2, on PCB #1.
The power failure alarm relay is energized during normal operation. Should the
power be removed for any reason, then Relay K6 would drop, creating an alarm for
the customer alarm transmitting device.
3.5.2 Photocell (PC)
The photocell alarm relay is energized whenever the photocell or SW3 is on. This
relay will allow the custom er to m onitor the modes of operation to determine if
switch from day to nightmode has occurred.
3.6 BLEEDER CIRCUIT
The bleeder circuit is the most important safety item in this system. It consists of resistor
R32 connected to the high voltage storage capacitor through relay K2. When the 24V DC
power supply is turned off, relays close allowing the resistors to discharge the high voltage
stored in the capacitor bank below 50V in 30 seconds.
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M.2007 Manuals.D-1LVS-24V DC
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***CAUTION***
NEVERRELY ONTHISCIRCUIT TORENDERTHIS SYSTEMHARMLESS. ANY
DEFECT IN THIS CIRCUIT COULD ALLOW A HAZARDOUS HIGH VOLTAGE
CHARGE TO REMAIN ON THE STORAGE CAPACITORS. ALWAYS WAIT AT
LEAST 30 SECONDS AFTER POWER HAS BEEN TURNED OFF BEFORE
STARTING ANY WORK ON THIS SYSTEM. ALWAYS MEASURE THE
VOLTAGE ON THE STORAGE CAPACITORS WITH A VOLTMETER BEFORE
STARTING ANY OTHER WORK ON THIS SYSTEM. NEVER ATTEMPT TO
DEFEAT THE SAFETY INTERLOCKS.
3.7 DIAGNOSTIC LEDs
The diagnostic LEDs are provided as a means of m aking system check and m aintenance
more convenient. These LEDs are located at the edge of PCB #1.
LED #1 Flash Verify
LED #2 Disable the Flash for Flash Fail Test
LED #4 Power Supply 12V
LED #6 Trigger Voltage 300V
LED #7 Nightmode Operation
LED #8 Timing Signal
LED #9 Trigger Signal
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D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
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4.0 TROUBLE SHOOTING
Much of the trouble shooting of this system will consist of correcting a “beacon out” situation. There
may also be a failure mode where the flashtube is still flashing, but at the wrong rate or the wrong
intensity.
You must study and understand the safety messages and the theory of operation before attempting
any service on this system. Servicing this system must be done by qualified personnel only.
***W A R N I N G - H I G H - V O L T A G E***
THIS SYSTEM OPERATES AT HIGH VOLTAGE LEVELS THAT COULD BE LETHAL
TO SERVICE PERSONNEL. ALL INSTALLATION ANDMAINTENANCE WORK MUST
BE DONE BY QUALIFIED SERVICE PERSONNEL. READ AND UNDERSTAND THE
THEORY OF OPERATION AND ITS SAFETY MESSAGES BEFORE ATTEMPTING
INSTALLATION OF THIS SYSTEM. DO NOTATTEMPT TO DEFEATTHE INTERNAL
SAFETY DEVICES.
4.1 TOOL REQUIREMENTS
In order to be prepared to trouble shoot or repair this system, a minimum amount of tools and
equipment will be required. A recommendation list includes:
1) 5/16 Electrician’s Screwdriver
1) Nut Drivers or Socket Set
1) Multi meter - Analog or Digital 600V AC/600V DC Minimum
4.2 DIAGNOSTIC EVALUATION
The first step in trouble shooting of this sy stem or performing annual maintenance will
require the technician to open the controller door. With the power off to the controller, the
technician should look over the controller circuit and repair or replace any apparent problems
such as loose wire connections or corroded terminations. After the initial visual checks have
been completed, restore power to the contro ller and pull out on the plunger of the cabinet
safety switch (CSS), which is located at the lower right edge of the enclosure. Observe at
this time the LEDs located on PCB #1. Determine by observation of these LED indicators if
the controller is performing to normal operation.
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LEDs on PCB #1 are numbered from top to bottom #1 - #9. The following chart will indicate
normal LED operation.
INDICATOR OPERATION NORMAL STATUS
LED #1 Flash Verify Blinks
LED #2 Strobe Fail Test Normal OFF/Flashes in Test Mode
LED #4 Control Power ON Steady ON
LED #6 Trigger Voltage Blinks
LED #7 Nightmode Steady ON during Nightmode Operation
LED #8 Primary Timing Flashing
LED #9 Timing Verify Flashing
4.3 TROUBLE SHOOTING ASSISTANCE
4.3.1 Flash Verify LED - Out
4.3.1.1 Check capacitor voltage with a voltmeter 1,000 V DC volt range. If no
high voltage (1,000 V DC), replace power converter and / or check for
bad capacitors. If HV is present at capacitors, go to the next step.
4.3.1.2 Check the status of the trigger LED. If LED is dim or off, check fuse
F2. If blown, replace with exact type of fuse. If the fuse blows again,
replace PCB #1. If LED is okay, go to the next step.
4.3.1.3 If steps 4.3.1.1 and 4.3.1.2 check out okay, relamp the beacon.
4.3.2 Control Power On LED - Out
Check interlock circuit for an open circuit. If open, make the necessary repairs. If
okay, check fuse F3 on PCB #1. Replace if bad.
4.3.3 Primary Timing LED Out
Observe the status of the timing LED. If the LED is dim or out completely, check
LED #9. If dim or out, replace PCB #1. If one (1) or both are lit, you should have
timing.
4.3.4 False or Nonexistent Beacon Alarms
4.3.4.1 If alarms trip when the system appears to be working normally or fails to
show an alarm when there is an obvious failure, replace PCB #1.
4.3.4.2 The time delay between an actual failure and the point where the relay
trips is preset at the factory at about eight (8) seconds. This delay period
can be tested by throwing “on” switch S1 (on the circuit board #1).
When this switch is in the alarm test mode, the test mode indicator (LED
#2) will be illuminated or blinking slightly.
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***W A R N I N G - H I G H - V O L T A G E***
THIS SYSTEM OPERATES AT HIGH VOLTAGE LEVELS THAT COULD BE LETHAL TO
SERVICE PERSONNEL. ALL INSTALLATION AND MAINTENANCE WORK MUST BE DONE
BY QUALIFIED SERVICE PERSONNEL. READ AND UNDERSTAND THE THEORY OF
OPERATIONANDITS SAFETYMESSAGES BEFOREATTEMPTING INSTALLATIONOF THIS
SYSTEM. DO NOT ATTEMPT TO DEFEAT THE INTERNAL SAFETY DEVICES.
5.0 MAINTENANCE GUIDE
5.1 FLASHTUBE REPLACEMENT
The only required maintenance needed to be performed is the replacement of the flashtubes
every two (2) years. By following these instructions, maximum safety and performance can
be achieved.
5.1.1 Loosen the wing nut on each latch pin so that it can recline.
5.1.2 Open the lens and tilt it back.
ALWAYS WAIT AT LEAST 30 SECONDS AFTER OPENING THE BEACON
BEFORE STARTING ANY WORK ON THE BEACON.
5.1.3 Loosen the three (3) socket screws with a screwdriver to remove lamp.
5.1.4 Install the new flashtube making sure that the red marked pin is aligned with the red
wire on the socket. Make sure tube is flush on all socket lugs.
5.1.5 Tighten the socket screws snug, then 1/4 turn more.
5.1.6 Close the lens - make sure nothing hampers safety interlock action.
5.1.7 Re-tighten the three (3) wing nuts on the beacon.
5.2 POWER SUPPLY
No scheduled maintenance is required. Perform on an “as needed” basis only.
5.3 PHOTOCELL
The photocell is a sealed unit. No maintenance is needed or required other than replacement
as necessary.
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6.0 MAJOR COMPONENTS PARTS LIST
SCHEMATIC TAG # DESCRIPTION TWR PART #
BSS1 BEACON SAFETY SWITCH STJ02003
C103 - C108 40uf 1KV CAP STB99006
C102 3uf 660V AC CAP STB99008CSI
CSS CABINET SAFETY SWITCH STJ02001
F1 10 amp FUSE KTK10
F2 1/8 amp FUSE FLQ 1/8
FT3 FLASHTUBE STFLSHTB5
K6 SPDT OCTAL RELAY KRPA5DG24
K1, K4, K5 DPDT OCTAL RELAY KRPA11DG24
K2 HV BLEEDER RELAY PRD-11DYO24
L1 INDUCTOR INDCTR3001
L11 BURSTING CHOKE 100273
D1, D2 TVS ZENER DIODES STD01009
MOV3 METAL OXIDE VARISTOR V1000LA80A
P1 15 POSITION PLUG STT60021
PCB #1 D-1LVS24V DC PCB STH01293
PCB #3 RELAY PCB STH03226
PHOTOCELL 12 - 48V DC PHOTOCELL 6589C-FAA2
R31 150 ohm 100W STA08018
R32 35K 20W STA08015
R33 2.4 MEG 2W STA08010
SW3 SPDT 15 amp SWITCH STJ01002
PS WILMORE PS# (1699A) 1699A
T4 TRIGGER TRANSFOMER STC05005
TB1 10 PART TERM BLK TERMBLK-10
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SCHEMATIC TAG # DESCRIPTION TWR PART #
TLS THERMAL LIMITING SWITCH STJ10008
STROBE BEACON STBEACON6
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7.0 RECOMMENDED SPARE PARTS LIST
QUANTITY PART NUMBER DESCRIPTION
1 STH01293 D-1LVS24V DC PCB
1 PRD-11DYO24 DPDT CONTACTOR RELAY
1 STFLSHTB5 STROBE FLASHTUBE
1 6589C-FAA2 PHOTOCELL, 12 - 48V DC
2 KTK10 10 amp FUSE
2 FLQ18 1/8 amp FUSE
1 KRPA5DG24 SPDT RELAY
2 KRPA11DG24 DPDT RELAY
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Warranty & Return Policy
TWR Lighting, Inc. (“TWR”) warrants its products (other than “LED Product”) against defects in
design, material (excluding incandescent bulbs) and workmanship for a period ending on the earlier of two (2)
years from the date of shipment or one (1) year from the date of installation.
TWR Lighting, Inc. (“TWR”) warrants its “LED Product” against defects in design, m aterial and
workmanship for a period of five (5) years from the date of shipment. TWR, at its sole option, will, itself, or
through others, repair, replace or refund the purchase price paid for “LED Product” that TWR verifies as being
inoperable due to original design, m aterial or work manship. All warranty replacement “LED Product” is
warranted only for the remainder of the original warranty of the “LED Product” replaced. Replacement “LED
Product” will be equivalent in function, but not necessarily identical, to the replaced “LED Product.”
TWRLighting, Inc.(“TWR”) warrantsits “LEDProduct” against light degradation for a period of five (5)
years from the date of installation. TWR, at its sole option, will, itself, or through others, repair, replace or
refund the purchase price paid for “LED Product” that TWR verifies as failing to meet 70% of the minimum
intensity requirements as defined in the FAA Advisory Circular 150/5345-43E dated 10/19/95. All warranty
replacement “LED Product” is warranted only for the remainder of the original warranty of the “LED Product”
replaced. Replacement “LED Product” will be equivalent in function, but not necessarily identical, to the
replaced “LED Product.”
Replacement parts (other than “LED Product”) are warranted for 90 days from the date ofshipment.
Conditions not covered by this Warranty, or which might void this Warranty are as follows:
•Improper Installation or Operation
•Misuse
•Abuse
•Unauthorized or Improper Repair or Alteration
•Accident or Negligence in Use, Storage, Transportation, or Handling
•Any Acts of God or Nature
•Non-OEM Parts
The use of non-OEM parts or modifications to original equipment design will void the
manufacturer warranty and could invalidate the assurance of complying with FAA
requirements as published in Advisory Circular 150/5345-43.
Field Service – Repairs are warranted for 90 days from the date of service, except where TWR has made
recommendations that were not adhered to that m ay cause premature failure on previous repairs. Labor,
Travel, and Tower Climb are not covered under warranty. Customer shall be obligated to pay for all incurred
charges not related to warranty. All warranty repairs are performed by trained TWR personnel, or dispatched
through an extensive network of certified and insured Service Representatives.

D-1LVS-24V DC CONTROLLER
M.2007 Manuals.D-1LVS-24V DC
09/14/07
Warranty & Return Policy
(continued)
Return Policy
ReturnTerms– You must first contact our Customer Service Department at 713-973-6905 to acquire
a Return Merchandise Authorization (RMA) number in order to return the product(s). Please have the
following information available when requesting an RMA number:
•The contact name and phone number of the tower owner
•The contact name and phone number of the contractor
•The site name and number
•The part number(s)
•The serial number(s) (if any)
•A description of the problem
•The billing information
•The Ship To address
This RMA number must be clearly visible on the outside of the box. If the RMA number is not
clearly labeled on the outside of the box, your shipment will be refused. Please ensure the material
you are returning is packaged carefully . The warranty is null and void if the product(s) are
damaged in the return shipment.
All RMAs must be received by TWR LIGHTING, INC., 4300 WINDFERN RD #100,
HOUSTON TX 77041-8943, within 30 days of issuance.
Upon full compliance with the Return Terms, TWR will replace, repair and return, or credit product(s)
returned by the customer. It is TWR’ s sole discretion to determine the disposition of the returned
item(s).
Replacements – Replacem ent part(s) will be shipped a nd billed to the custom er for product(s)
considered as Warranty , pending return of def ective product(s). When available, a certified
reconditioned part is shipped as warranty replacement with a Return Merchandise Authorization
(RMA) number attached. Upon receipt of returned product(s), inspection, testing, and evaluation will
be performed to determine the cause of defect. The customer is then notified of the determination of
the testing.
•Product(s) that is deemed defective and/or unrepairable and covered under warranty - a credit will
be issued to the customer’s account.
•Product(s) found to have no defect will be subject to a $60.00 per hour testing charge (1 hour
minimum), which will be invoiced to the customer. At this time the customer may decide to
have the tested part(s) returned and is responsible for the return charges.
•Product(s) under warranty , which the custom er does not wish returned, the customer will be
issued a credit against the replacement invoice.