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Plasma CuttingPower Supply

Firepower TM FP-38 Power Supply

Operating Manual

May 5, 2003 Manual No. 0-2967

A-03286

WARNINGS

Read and understand this entire Manual and your employer’s safety practices before installing, oper-ating, or servicing the equipment.

While the information contained in this Manual represents the Manufacturer's best judgement, theManufacturer assumes no liability for its use.

Plasma Cutting Power Supply

FirepowerTM FP-38 Power Supply

Operating Manual Number 0-2967

Published by:Thermal Dynamics Corporation82 Benning StreetWest Lebanon, New Hampshire, USA 03784(603) 298-5711

www.firepoweronline.com

Copyright 2002 byThermal Dynamics Corporation

All rights reserved.

Reproduction of this work, in whole or in part, without written permission of thepublisher is prohibited.

The publisher does not assume and hereby disclaims any liability to any party forany loss or damage caused by any error or omission in this Manual, whether sucherror results from negligence, accident, or any other cause.

Printed in the United States of America

Publication Date: May 5, 2003

Record the following information for Warranty purposes:

Where Purchased:____________________________________

Purchase Date:_______________________________________

Power Supply Serial #:________________________________

Torch Serial #:________________________________________

TABLE OF CONTENTS

SECTION 1:GENERAL INFORMATION ............................................................................................... 1-1

1.01 Notes, Cautions and Warnings ..................................................................... 1-11.02 Important Safety Precautions ....................................................................... 1-11.03 Publications .................................................................................................. 1-21.07 Declaration of Conformity ............................................................................. 1-41.08 Statement of Warranty .................................................................................. 1-5

SECTION 2: SPECIFICATIONS............................................................................................... 2-1

Options and Accessories ..................................................................................... 2-2Torch Specifications ............................................................................................. 2-2

SECTION 3: INSTALLATION .................................................................................................... 3-1

3.1 Unpacking .................................................................................................... 3-13.2 Lifting Options .............................................................................................. 3-13.3 Primary Input Power Connections ................................................................ 3-23.4 Gas Connections ......................................................................................... 3-33.5 Torch Connections ....................................................................................... 3-6

SECTION 4:OPERATION ..................................................................................................................... 4-1

4.01 Product Features .......................................................................................... 4-14.02 Preparations For Operating .......................................................................... 4-34.03 Sequence of Operation ................................................................................ 4-7

SECTION 5:SERVICE .......................................................................................................................... 5-1

5.01 General Maintenance ................................................................................... 5-15.02 Common Faults ............................................................................................ 5-45.03 Basic Troubleshooting Guide ........................................................................ 5-5

SECTION 6:PARTS LISTS.................................................................................................................... 6-1

6.01 Introduction .................................................................................................. 6-16.02 Ordering Information .................................................................................... 6-16.03 Replacement Assemblies ............................................................................ 6-16.04 Power Supply Replacement Parts ................................................................ 6-16.05 Options and Accessories ............................................................................. 6-2

APPENDIX 1: SEQUENCE OF OPERATION (BLOCK DIAGRAM) ......................................... A-1

APPENDIX 2: DATA TAG INFORMATION ................................................................................. A-2

APPENDIX 3: SYSTEM SCHEMATIC....................................................................................... A-4

May 14, 2002 1-1 GENERAL INFORMATION

SECTION 1:GENERAL INFORMATION

1.01 Notes, Cautions and Warnings

Throughout this manual, notes, cautions, and warningsare used to highlight important information. These high-lights are categorized as follows:

NOTE

An operation, procedure, or background informa-tion which requires additional emphasis or is help-ful in efficient operation of the system.

CAUTION

A procedure which, if not properly followed, maycause damage to the equipment.

WARNING

A procedure which, if not properly followed, maycause injury to the operator or others in the oper-ating area.

1.02 Important Safety Precautions

WARNINGS

OPERATION AND MAINTENANCE OFPLASMA ARC EQUIPMENT CAN BE DAN-GEROUS AND HAZARDOUS TO YOURHEALTH.

Plasma arc cutting produces intense electric andmagnetic emissions that may interfere with theproper function of cardiac pacemakers, hearing aids,or other electronic health equipment. Persons whowork near plasma arc cutting applications shouldconsult their medical health professional and themanufacturer of the health equipment to determinewhether a hazard exists.

To prevent possible injury, read, understand andfollow all warnings, safety precautions and instruc-tions before using the equipment. Call 1-603-298-5711 or your local distributor if you have any ques-tions.

GASES AND FUMES

Gases and fumes produced during the plasma cuttingprocess can be dangerous and hazardous to your health.

• Keep all fumes and gases from the breathing area.Keep your head out of the welding fume plume.

• Use an air-supplied respirator if ventilation is notadequate to remove all fumes and gases.

• The kinds of fumes and gases from the plasma arcdepend on the kind of metal being used, coatingson the metal, and the different processes. You mustbe very careful when cutting or welding any met-als which may contain one or more of the follow-ing:

Antimony Chromium MercuryArsenic Cobalt NickelBarium Copper SeleniumBeryllium Lead SilverCadmium Manganese Vanadium

• Always read the Material Safety Data Sheets(MSDS) that should be supplied with the materialyou are using. These MSDSs will give you the in-formation regarding the kind and amount of fumesand gases that may be dangerous to your health.

• For information on how to test for fumes and gasesin your workplace, refer to item 1 in Subsection 1.03,Publications in this manual.

• Use special equipment, such as water or down draftcutting tables, to capture fumes and gases.

• Do not use the plasma torch in an area where com-bustible or explosive gases or materials are located.

• Phosgene, a toxic gas, is generated from the vaporsof chlorinated solvents and cleansers. Remove allsources of these vapors.

• This product, when used for welding or cutting, pro-duces fumes or gases which contain chemicalsknown to the State of California to cause birth de-fects and, in some cases, cancer. (California Health& Safety Code Sec. 25249.5 et seq.)

ELECTRIC SHOCK

Electric Shock can injure or kill. The plasma arc processuses and produces high voltage electrical energy. Thiselectric energy can cause severe or fatal shock to the op-erator or others in the workplace.

• Never touch any parts that are electrically “live” or“hot.”

GENERAL INFORMATION 1-2 May 14, 2002

• Wear dry gloves and clothing. Insulate yourselffrom the work piece or other parts of the weldingcircuit.

• Repair or replace all worn or damaged parts.

• Extra care must be taken when the workplace ismoist or damp.

• Install and maintain equipment according to NECcode, refer to item 9 in Subsection 1.03, Publications.

• Disconnect power source before performing any ser-vice or repairs.

• Read and follow all the instructions in the Operat-ing Manual.

FIRE AND EXPLOSION

Fire and explosion can be caused by hot slag, sparks, orthe plasma arc.

• Be sure there is no combustible or flammable mate-rial in the workplace. Any material that cannot beremoved must be protected.

• Ventilate all flammable or explosive vapors fromthe workplace.

• Do not cut or weld on containers that may have heldcombustibles.

• Provide a fire watch when working in an area wherefire hazards may exist.

• Hydrogen gas may be formed and trapped underaluminum workpieces when they are cut underwa-ter or while using a water table. DO NOT cut alu-minum alloys underwater or on a water table un-less the hydrogen gas can be eliminated ordissipated. Trapped hydrogen gas that is ignitedwill cause an explosion.

NOISE

Noise can cause permanent hearing loss. Plasma arc pro-cesses can cause noise levels to exceed safe limits. Youmust protect your ears from loud noise to prevent per-manent loss of hearing.

• To protect your hearing from loud noise, wear pro-tective ear plugs and/or ear muffs. Protect othersin the workplace.

• Noise levels should be measured to be sure the deci-bels (sound) do not exceed safe levels.

• For information on how to test for noise, see item 1in Subsection 1.03, Publications, in this manual.

PLASMA ARC RAYS

Plasma Arc Rays can injure your eyes and burn your skin.The plasma arc process produces very bright ultra violetand infra red light. These arc rays will damage your eyesand burn your skin if you are not properly protected.

• To protect your eyes, always wear a welding hel-met or shield. Also always wear safety glasses withside shields, goggles or other protective eye wear.

• Wear welding gloves and suitable clothing to pro-tect your skin from the arc rays and sparks.

• Keep helmet and safety glasses in good condition.Replace lenses when cracked, chipped or dirty.

• Protect others in the work area from the arc rays.Use protective booths, screens or shields.

• Use the shade of lens as suggested in the followingper ANSI/ASC Z49.1:

Minimum Protective SuggestedArc Current Shade No. Shade No.

Less Than 300* 8 9

300 - 400* 9 12

400 - 800* 10 14

* These values apply where the actual arc is clearlyseen. Experience has shown that lighter filters maybe used when the arc is hidden by the workpiece.

1.03 Publications

Refer to the following standards or their latest revisionsfor more information:

1. OSHA, SAFETY AND HEALTH STANDARDS, 29CFR1910, obtainable from the Superintendent of Documents,U.S. Government Printing Office, Washington, D.C.20402

2. ANSI Standard Z49.1, SAFETY IN WELDING ANDCUTTING, obtainable from the American Welding So-ciety, 550 N.W. LeJeune Rd, Miami, FL 33126

3. NIOSH, SAFETY AND HEALTH IN ARC WELDINGAND GAS WELDING AND CUTTING, obtainable fromthe Superintendent of Documents, U.S. GovernmentPrinting Office, Washington, D.C. 20402

4. ANSI Standard Z87.1, SAFE PRACTICES FOR OCCU-PATION AND EDUCATIONAL EYE AND FACE PRO-TECTION, obtainable from American National Stan-dards Institute, 1430 Broadway, New York, NY 10018

5. ANSI Standard Z41.1, STANDARD FOR MEN’SSAFETY-TOE FOOTWEAR, obtainable from the Ameri-can National Standards Institute, 1430 Broadway, NewYork, NY 10018


6. ANSI Standard Z49.2, FIRE PREVENTION IN THE USEOF CUTTING AND WELDING PROCESSES, obtain-able from American National Standards Institute, 1430Broadway, New York, NY 10018

7. AWS Standard A6.0, WELDING AND CUTTING CON-TAINERS WHICH HAVE HELD COMBUSTIBLES, ob-tainable from American Welding Society, 550 N.W.LeJeune Rd, Miami, FL 33126

8. NFPA Standard 51, OXYGEN-FUEL GAS SYSTEMSFOR WELDING, CUTTING AND ALLIED PRO-CESSES, obtainable from the National Fire ProtectionAssociation, Batterymarch Park, Quincy, MA 02269

9. NFPA Standard 70, NATIONAL ELECTRICAL CODE,obtainable from the National Fire Protection Associa-tion, Batterymarch Park, Quincy, MA 02269

10. NFPA Standard 51B, CUTTING AND WELDING PRO-CESSES, obtainable from the National Fire ProtectionAssociation, Batterymarch Park, Quincy, MA 02269

11. CGA Pamphlet P-1, SAFE HANDLING OF COM-PRESSED GASES IN CYLINDERS, obtainable from theCompressed Gas Association, 1235 Jefferson DavisHighway, Suite 501, Arlington, VA 22202

12. CSA Standard W117.2, CODE FOR SAFETY IN WELD-ING AND CUTTING, obtainable from the CanadianStandards Association, Standards Sales, 178 RexdaleBoulevard, Rexdale, Ontario, Canada M9W 1R3

13. NWSA booklet, WELDING SAFETY BIBLIOGRAPHYobtainable from the National Welding Supply Associa-tion, 1900 Arch Street, Philadelphia, PA 19103

14. American Welding Society Standard AWSF4.1, RECOM-MENDED SAFE PRACTICES FOR THE PREPARA-TION FOR WELDING AND CUTTING OF CONTAIN-ERS AND PIPING THAT HAVE HELD HAZARDOUSSUBSTANCES, obtainable from the American WeldingSociety, 550 N.W. LeJeune Rd, Miami, FL 33126

15. ANSI Standard Z88.2, PRACTICE FOR RESPIRATORYPROTECTION, obtainable from American NationalStandards Institute, 1430 Broadway, New York, NY10018


1.07 Declaration of ConformityManufacturer: Thermal Dynamics CorporationAddress: 82 Benning Street

West Lebanon, New Hampshire 03784USA

The equipment described in this manual conforms to all applicable aspects and regulations of the ‘Low Voltage Directive’(European Council Directive 73/23/EEC as amended by Council Directive 93/68/EEC) and to the National legislation forthe enforcement of this Directive.

Serial numbers are unique with each individual piece of equipment and details description, parts used to manufacture a unitand date of manufacture.

National Standard and Technical SpecificationsThe product is designed and manufactured to a number of standards and technical requirements. Among them are:

* CSA (Canadian Standards Association) standard C22.2 number 60 for Arc welding equipment.

* UL (Underwriters Laboratory) rating 94VO flammability testing for all printed-circuit boards used.

* ISO/IEC 60974-1 (BS 638-PT10) (EN 60 974-1) (EN50192) (EN50078) applicable to plasma cutting equipment and associ-ated accessories.

* Extensive product design verification is conducted at the manufacturing facility as part of the routine design and manufac-turing process. This is to ensure the product is safe, when used according to instructions in this manual and relatedindustry standards, and performs as specified. Rigorous testing is incorporated into the manufacturing process to ensurethe manufactured product meets or exceeds all design specifications.

Thermal Dynamics has been manufacturing products for more than 30 years, and will continue to achieve excellence in ourarea of manufacture.

Manufacturers responsible representative: Giorgio BassiManaging DirectorThermal Dynamics EuropeVia rio Fabbiani 8A40067 Rastignano (BO)Italy


1.08 Statement of Warranty

LIMITED WARRANTY: Firepower® (hereinafter “Firepower”) warrants that its products will be free of defects in workmanship ormaterial. Should any failure to conform to this warranty appear within the time period applicable to the Firepower products as statedbelow, Firepower shall, upon notification thereof and substantiation that the product has been stored, installed, operated, and maintainedin accordance with Firepower’s specifications, instructions, recommendations and recognized standard industry practice, and not subjectto misuse, repair, neglect, alteration, or accident, correct such defects by suitable repair or replacement, at Firepower’s sole option, ofany components or parts of the product determined by Firepower to be defective.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE.

LIMITATION OF LIABILITY: Firepower shall not under any circumstances be liable for special or consequential damages, such as, butnot limited to, damage or loss of purchased or replacement goods, or claims of customers of distributor (hereinafter “Purchaser”) forservice interruption. The remedies of the Purchaser set forth herein are exclusive and the liability of Firepower with respect to anycontract, or anything done in connection therewith such as the performance or breach thereof, or from the manufacture, sale, delivery,resale, or use of any goods covered by or furnished by Firepower whether arising out of contract, negligence, strict tort, or under anywarranty, or otherwise, shall not, except as expressly provided herein, exceed the price of the goods upon which such liability is based.

THIS WARRANTY BECOMES INVALID IF REPLACEMENT PARTS OR ACCESSORIES ARE USED WHICH MAY IMPAIR THESAFETY OR PERFORMANCE OF ANY FIREPOWER PRODUCT.

THIS WARRANTY IS INVALID IF THE PRODUCT IS SOLD BY NON-AUTHORIZED PERSONS.

The limited warranty periods for Firepower products shall be as follows: A maximum of four (4) years from date of sale to an authorizeddistributor and a maximum of three (3) years from date of sale by such distributor to the Purchaser, and with the following furtherlimitations on such three (3) year period.

FP-38 POWER SUPPLIES PARTS LABOR

MAIN POWER MAGNETICS ...................................................................................................... 3 YEARS ................... 1 YEAR

ORIGINAL MAIN POWER RECTIFIER ..................................................................................... 3 YEARS ................... 1 YEAR

CONTROL PC BOARD .................................................................................................................. 3 YEARS ................... 1 YEAR

ALL OTHER CIRCUITS AND COMPONENTS ......................................................................... 1 YEAR .................... 1 YEARINCLUDING, BUT NOT LIMITED TO, STARTINGCIRCUIT, CONTACTORS, RELAYS, SOLENOIDS, PUMPS,POWER SWITCHING SEMI-CONDUCTORS

CONSOLES, CONTROL EQUIPMENT, HEAT ............................................................................. 1 YEAR .................. 1 YEAREXCHANGES, AND ACCESSORY EQUIPMENT

TORCH AND LEADS ......................................................................................................................... 1 YEAR .................. 1 YEAR

REPAIR/REPLACEMENT PARTS .................................................................................................... 90 DAYS .................. NONE

Warranty repairs or replacement claims under this limited warranty must be submitted by an authorized Firepower repair facilitywithin thirty (30) days of the repair. No transportation costs of any kind will be paid under this warranty. Transportation charges tosend products to an authorized warranty repair facility shall be the responsibility of the customer. All returned goods shall be at thecustomer’s risk and expense. This warranty supersedes all previous Firepower warranties.

Effective May 5, 2000

Manual 0-2967 2-1 SPECIFICATIONS

SECTION 2: SPECIFICATIONS

15.75"400 mm

10"254 mm

21"0.53 m

43 lb / 19.5 kg

A-03378

6"150 mm

A-03379

6"150 mm

6"150 mm

6"150 mm

Weight includes torch & leads, input power cord,and work cable with clamp.

CAUTION

Provide clearance for proper air flow throughthe power supply. Operation without properair flow will inhibit proper cooling and reduceduty cycle.

Input Power (See Note 1)

Power SensingInput Power CableOutput Current

Power Supply Gas Filtering Ability

Ambient TemperatureDuty Cycle 35% 60%DC Voltage 78 vdc 89 vdcCurrent 30 Amps 22 Amps

Firepower FP-38 Power Supply Specifications120 VAC (± 10%), Single-Phase, 50/60 Hz208 - 230 VAC (± 10%), Single-Phase, 50/60 HzAutomatic Voltage Selection. See Note 1.Cable with plug, for 120VAC, 20-Amp Single-Phase input power. (Note 2)20-30 Amps, continuously variable

Particulates to 20 Microns (Note 4)

Firepower FP-38 Power Supply Duty Cycle (Note 3)104° F (40° C)

n/a %n/a vdc

n/a Amps

3. Duty Cycle is the percentage of time the system can be operated without overheating. Duty cycle is reduced if primary input voltage (AC) is low or the DC voltage is higher than shown in this chart.4. Air supply must be free of oil, moisture, and other contaminants. Excessive oil and moisture may cause double-arcing, rapid tip wear, or even complete torch failure. Contaminants may cause poor cutting performance and rapid electrode wear. Optional filters provide increased filtering capabilities.

Notes1. Power supply accepts 120-230 VAC input power. No manual switching is required.2. Plug must be replaced for 208/230V input power.

SPECIFICATIONS 2-2 Manual 0-2967

Electrical Requirements

Input Power Input Current InputVoltage Freq. (kVA) (Amps) Fuse (Amps) Wire (AWG) Wire (Canada)(Volts) (Hz) 1-Ph 1-Ph 1-Ph 1-Ph 1-Ph

120 50 / 60 3.6 29 35 12 12208 50 / 60 3.5 16 20 12 12230 50 / 60 3.4 14 20 12 12

F irepower FP -38 Input Power RequirementsS uggested S izes (S ee Notes)

Line Voltages with Suggested Circuit Protection and Wire SizesBased on National Electric Code and Canadian Electric Code

NOTES

Refer to Local and National Codes or local authority having jurisdiction for proper wiring requirements.

Cable size is de-rated based on the Duty Cycle of the equipment.

The suggested sizes are based on flexible power cable with power plug installations.

Cable conductor temperature used is 167° F (75° C).

An energy limiting fuse UL Class RK-1 (examples: BUSS LPS/LPN-RK or Gould-Shawmut AZK-A6K) should beused to minimize damage to Plasma Cutting, Welding or power distribution equipment.

NEVER use replaceable element fuses like UL Class H, or "one-time" fuses like UL Class K5.

Extension Cords

Extension cords must meet National Electric Code Guidelines (and OSHA Guidelines, where applicable). Extensioncords must have the same rating as the service and must have a three-pronged plug.

Options and Accessories

The following options is available for this Power Supply. Section 6 provides catalog numbers and ordering informa-tion.

A. Single-Stage Air Filter Kit

A single-stage air filter for use on compressed air shop systems. Highly effective at removing moisture andparticulate matter from the air stream to at least 0.85 microns.

Manual 0-2967 3-1 INSTALLATION

SECTION 3: INSTALLATION

3.1 Unpacking

1. Use the packing lists to identify and account for each item.

2. Inspect each item for possible shipping damage. If damage is evident, contact your distributor and / or shippingcompany before proceeding with the installation.

3. Record Power Supply and Torch model and serial numbers, purchase date and vendor name, in the informationblock at the front of this manual.

3.2 Lifting Options

The Power Supply includes a handle for hand lifting only. Be sure unit is lifted and transported safely and securely.

WARNINGS

Do not touch live electrical parts.

Disconnect input power cord before moving unit.

FALLING EQUIPMENT can cause serious personal injury and can damage equipment.

HANDLE is not for mechanical lifting.

• Only persons of adequate physical strength should lift the unit.

• Lift unit by the handles, using two hands. Do not use straps for lifting.

• Use optional cart or similar device of adequate capacity to move unit.

• Place unit on a proper skid and secure in place before transporting with a fork lift or other vehicle.

INSTALLATION 3-2 Manual 0-2967

3.3 Primary Input Power Connections

CAUTION

Check your power source for correct voltage before plugging in or connecting the unit. The primary power source,fuse, and any extension cords used must conform to local electrical code and the recommended circuit protection andwiring requirements as specified in Section 2.

Power Cord and Plug

This power supply includes an input power cord and plug suitable for 120 VAC, 20 Amp, Single - Phase inputpower.

A-03382 120 V, 20A, 1Ø

For 208 / 230 VAC input power, replace the supplied power plug. Use only an approved replacement input powerplug with ground.

Replace the plug as follows:

1. Cut the original cord close to the plug.

2. Strip back the outer cord cover as needed to connect the inner conductors to the replacement plug.

3. Connect conductors to the plug contacts according to the plug manufacturer's instructions. All three conductorsmust be connected to the plug.

Connect the input power cord as follows:

1. Check the power source for correct voltage before plugging in the unit.

2. Connect the input power cable (or close the main disconnect switch) to supply power to the system.


3.4 Gas Connections

A. Connecting Gas Supply to Unit

The connection is the same for compressed air or high pressure gas cylinders. Refer to subsection 3.4-C if an optionalair line filter is to be installed.

1. Connect the gas line to the inlet port. The illustration shows typical fittings as an example.

NOTE

For a secure seal, apply thread sealant to the fitting threads, according to manufacturer's instructions. Do Not useTeflon tape as a thread sealer, as small particles of the tape may break off and block the small gas passages in the torch.

A-03272

Min. 1/4 inch 6.4 mm

Gas Connection to Inlet Port

B. Check Air Quality

To test the quality of air, put the RUN / SET switch in the SET (down) position, place a welding filter lens in front ofthe torch and turn on the gas. Any oil or moisture in the air will be visible on the lens. Do not start an arc!

A-03385

A

3020

2628

24

22


C. Installing Optional Single - Stage Air Filter

An optional filter kit is recommended for improved filtering with compressed air, to keep moisture and debris out ofthe torch.

1. Attach the Single - Stage Filter Hose to the Inlet Port.

2. Attach the Filter Assembly to the filter hose.

3. Connect the gas line to the Filter. The illustration shows typical fittings as an example.

NOTE

For a secure seal, apply thread sealant to the fitting threads, according to the maker's instructions. Do Not useTeflon tape as a thread sealer, as small particles of the tape may break off and block the small gas passages in the torch.Connect as follows:

A-03281

1/4 NPT Hose Fitting

Hose Clamp

Gas Supply Hose

Filter Hose

Single-StageFilter Kit

No. 7-7507

Optional Single - Stage Filter Installation


D. Using High Pressure Gas Cylinders

When using high pressure gas cylinders as the gas supply:

1. Refer to the manufacturer’s specifications for installation and maintenance procedures for high pressure gasregulators.

2. Examine the cylinder valves to be sure they are clean and free of oil, grease or any foreign material. Briefly openeach cylinder valve to blow out any dust which may be present.

3. The cylinder must be equipped with an adjustable high - pressure regulator capable of outlet pressures up to 100psi (6.9 bar) maximum and flows of at least 300 scfh (141.5 lpm).

4. Connect gas supply hose to the cylinder.

NOTE

Pressure should be set at 100 psi (6.9 bar) at the high pressure gas cylinder regulator.

Supply hose must be at least 1/4 inch (6 mm) I.D.

For a secure seal, apply thread sealant to the fitting threads, according to manufacturer's instructions. Do Not useTeflon tape as a thread sealer, as small particles of the tape may break off and block the small gas passages in the torch.


3.5 Torch Connections

If necessary, connect the torch to the Power Supply. Connect only the model SL60 Torch to this power supply.

WARNING

Disconnect primary power at the source before connecting the torch.

1. Align the male connector (on the torch lead) with the female receptacle on the power supply. Press theconnector into the receptacle fully.

2. Turn the locking ring on the male connector fully clockwise until it clicks.

A-03380

1

2

Connecting the Torch to the Power Supply

3. The system is ready for operation.

Manual 0-2967 4-1 OPERATION

SECTION 4:OPERATION

4.01 Product Features

A. General Features

A-03287

Handle and Leads WrapGas Pressure Knob

Torch Leads Connector

Work Cableand Clamp

Control Panel

OPERATION 4-2 Manual 0-2967

B. Control Panel

A-03283

3

1

45

6

2

A

3020

2628

24

22

7

1. ON / OFF Switch

Controls input power to the power supply. Up is ON, down is OFF.

2. RUN / SET Switch

RUN (up) position is for general torch operation. SET (down) position is for setting gas pressure and purginglines.

3. (A) Output Current Control

Sets the desired output current. If the overload protection (fuse or circuit breaker) on the input power circuitopens frequently, either reduce cutting output, reduce the cutting time, or connect the unit to more adequateinput power. Refer to Section 2 for input power requirements.

4. AC Indicator

Steady light indicates power supply is ready for operation. Blinking light indicates unit is in protective interlockmode. Shut unit off, shut off or disconnect input power, correct the fault, and restart the unit. Refer to Section 5for details.

5. TEMP Indicator

Indicator is normally OFF. Indicator is ON when internal temperature exceeds normal limits. Shut unit OFF; letthe unit cool before continuing operation.

6. GAS Indicator

Indicator is ON when adequate input gas pressure for power supply operation is present. Minimum pressure forpower supply operation is below minimum for torch operation.

7. DC Indicator

Indicator is ON when DC output circuit is active.


4.02 Preparations For Operating

At the start of each operating session:

WARNING

Disconnect primary power at the source before assembling or disassembling power supply, torch parts, or torch andleads assemblies.

A. Torch Parts Selection

Check the torch for proper assembly and appropriate torch parts per the torch manual. The torch parts mustcorrespond with the type of operation, and with the amperage output of this Power Supply (30 amps maximum).Use only genuine Firepower parts with this torch.

B. Torch Connection

Check that the torch is properly connected.

C. Check Primary Input Power Source

1. Check the power source for proper input voltage. Make sure the input power source meets the power re-quirements for the unit per Section 2, Specifications.

2. Connect the input power cable (or close the main disconnect switch) to supply power to the system.

D. Gas Selection

Ensure air source meets requirements (refer to Section 2). Check connections and turn gas supply on.

E. Connect Work Cable

Clamp the work cable to the workpiece or cutting table. The area must be free from oil, paint and rust. Connectonly to the main part of the workpiece; do not connect to the part to be cut off.

A-03387


F. Power On

Place the Power Supply ON / OFF switch to the ON (up) position. AC indicator turns on. Gas indicator

turns on when there is sufficient gas pressure for power supply operation. Minimum pressure for power

supply operation is below the minimum for torch operation.

A-03384

A

3020

2628

24

22

G. Set Operating Pressure

Place the Power Supply RUN / SET switch to the SET (down) position. Gas will flow. Adjust gas pressure to 65psi / 4.5 bar.

A-03385

A

3020

2628

24

22

A-03389

1

2

65 psi / 4.5 bar


H. Select Current Output Level

Place RUN / SET switch to RUN (up) position. Gas flow will stop. Set the desired current output level.

A-03386

A

3020

2628

24

22

I. Cutting Operation

Refer to Section 1, Important Safety Precautions. Wear heavy welding gloves and protective clothing. Protecteyes with appropriate shielding. Refer to the torch manual for torch operation details.

J. Cutting Technique

Hold the torch with one or two hands, with the torch tip close to the workpiece. Do not cut or handle theworkpiece without welding gloves and protective clothing. Always wear protective eye shielding when cuttingor gouging. Move the torch along the cut line so the arc penetrates the workpiece and sparks emerge from thebottom of the cut. Good cutting speeds create a slight trailing arc.


K. Typical Cutting Speeds

Cutting speeds vary according to torch output, the type of material being cut, and operator skill. Speeds shownare typical for this cutting system using air plasma to cut mild steel, with output current at 30 amps and torchheld at 0 - 1/16" (0 - 1.6 mm) standoff.

5

9.5 0.375

0.2

0.1

6

18

Inches/ Meters per MinuteCUTTING SPEED

Gage

MM

MA

TE

RIA

L T

HIC

KN

ES

S

0.25

0.3

0.15

0.35

0.0520

12

8

6

7

2

4

1

3

Inch

InchesMeters

200.5

401.00

601.5

802.0

1002.5

1203.05

1403.5

1604.06

1804.57

2005.08

2205.56

2406.1

40010.1

Typical Cutting SpeedsAir Plasma on Mild Steel

2410

0.25

0.512.7

0.4

A-03381

Output current setting or cutting speeds may be reduced to allow slower cutting when following a line, using atemplate or cutting guide while still producing cuts of excellent quality.

L. Postflow

Release the trigger to stop the cutting arc. Gas continues to flow for approximately 10 seconds. During post -flow, if the user moves the trigger release to the rear and presses the trigger, the pilot arc starts. The main arctransfers to the workpiece if the torch tip is within transfer distance to the workpiece.

M. Shutdown

Turn the ON / OFF switch to OFF (down). All Power Supply indicators shut off. Unplug the input power cordor disconnect input power. Power is removed from the system.


4.03 Sequence of Operation

The following is a typical sequence of operation for this power supply. Refer to Appendix 1 for block diagram.

1. Plug the input power cord into an active circuit.

a. AC power is available at the Power Supply.

2. Place the ON / OFF switch on the Power Supply to ON (up) position.

a. AC indicator turns on; fan turns on: Gas indicator turns ON when there is sufficient gas pressure

for power supply operation. Minimum pressure for power supply operation is below minimum for torchoperation.

NOTES

If there is adequate gas supply pressure to the power supply, gas comes on if Torch Trigger is pressed.

If torch trigger is held while user turns on main AC power, system goes into 'protective interlock' mode. ACindicator flashes; torch will not pilot. Release torch trigger, turn AC switch OFF then ON.

3. Put RUN / SET switch to SET (down position).

a. Gas flows to set pressure. Turn gas pressure adjustment knob to set pressure to 65 psi / 4.5 bar.

4. Put RUN / SET switch to RUN (up position). Gas flow stops.

5. Wear protective clothing and welding gloves. Protect eyes. Slide the trigger release to the rear; squeeze andhold the trigger. Gas flows briefly, then shuts off momentarily. Then gas flow will resume. Pilot arc is estab-lished. DC indicator turns ON. Move Torch within transfer distance of workpiece.

a. Main arc transfers to workpiece.

6. Complete cutting operation.

NOTE

If the torch is lifted from the workpiece while the torch switch is activated, the main arc will stop and the pilot arc willautomatically restart.

7. Release the torch trigger.

a. Main arc stops; gas flows for approximately 10 seconds.

8. Set the power supply ON / OFF switch to OFF (down) position.

a. All indicators turn OFF; fan turns OFF.

9. Set the main power disconnect to OFF, or unplug input power cord.

a. Input power is removed from the system.

Manual 0-2967 5-1 SERVICE

SECTION 5:SERVICE

5.01 General Maintenance

A. Each Use

Check torch consumables for wear, replace if necessary.

WARNING

Shut off power before inspecting or removing torch parts.

B. Every three months

A. Check internal air filter, replace if necessary.

1. Shut off input power; turn off the gas supply. Bleeddown the gas supply.

2. Remove the upper cover screws.

3. Loosen the lower screws. Pull the cover up andaway from the unit.

NOTE

Leave internal ground wire in place.

Upper screws

Ground wire

Lower screws

Upper screws

A-03285

Cover Removal

SERVICE 5-2 Manual 0-2967

4. Pull the upper end of the drain tube off the fitting on the filter bowl.

5. Unscrew the bowl. The filter element will be visible and still attached to the main body of the Regulator / Filter.

6. Unscrew the filter element from the Regulator / Filter body. The filter element will come off with a spool and someadditional pieces.

7. Note the correct assembly of the filter / spool then remove the filter from the spool and either clean it or replace it.

8. Screw the filter element and spool, with the baffle ring in place (teeth facing downward) back into the Regulatorbody by compressing the spring on the spool. Tighten firmly by hand.

A-03377

ReplacementElementNo. 9-4414

Spool

Bowl

Ring

Regulator / Filter Element Replacement

9. Clean the inside of the bowl if necessary. Check that the knurled valve on the bottom of the bowl is fully open.

10. Reinstall the bowl. Reconnect the drain tube.

11. Reinstall the cover as follows:

a. Reconnect the ground wire, if necessary.

b. Set the cover onto the base so that it rests on the lower screws.

c. Tighten lower screws.

d. Reinstall and tighten the upper screws.

12. Turn on the air supply.


B. Check Optional Single - Stage Filter Element, replace if necessary.

1. Shut off input power.

2. Shut off air supply, bleed down system.

3. Disconnect gas supply hose from filter.

4. Turn the Cover counter - clockwise.

5. Remove the Filter Element from the Housing and set Element aside to dry.

6. Wipe inside of housing clean, then insert the replacement Filter Element open side first.

7. Replace Housing on Cover.

8. Reattach gas supply hose. If unit leaks between housing and cover, inspect the "O" Ring for cuts or other damage.

A-02476

FilterElement

(Cat. No. 9-7741)

Housing

Cover

BarbedFitting

Spring

Assembled FilterO-ring


5.02 Common Faults

1. Insufficient Penetration

a. Cutting speed too fast

b. Torch tilted too much

c. Metal too thick

d. Worn torch parts

e. Cutting current too low

f. Non - Genuine Firepower parts used

2. Main Arc Extinguishes

a. Cutting speed too slow

b. Torch standoff too high from workpiece

c. Cutting current too high

d. Work cable disconnected

e. Worn torch parts


3. Excessive Dross Formation

a. Cutting speed too slow

b. Torch standoff too high from workpiece

c. Worn torch parts

d. Improper cutting current

e. Non - Genuine Firepower parts used

4. Short Torch Parts Life

a. Oil or moisture in air source

b. Exceeding system capability (material too thick)

c. Excessive pilot arc time

d. Gas pressure too low

e. Improperly assembled torch


5. Difficult Starting

a. Worn torch parts

b. Non - Genuine Firepower parts used


5.03 Basic Troubleshooting Guide

WARNING

There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose or repairunless you have had training in power electronics measurement and troubleshooting techniques.

A. Basic Troubleshooting: Overview

This guide covers basic troubleshooting. It is helpful for solving many of the common problems that can arise with thissystem. If major complex subassemblies are faulty, the unit must be returned to an authorized service center for repair.

Follow all instructions as listed and complete each section in the order presented.

For major troubleshooting and parts replacement procedures refer to the Power Supply Service Manual for this prod-uct.

B. How to Use This Guide

The following information will help the Customer / Operator determine the most likely causes for various symptoms.Follow all instructions as listed and complete each section in the order presented.

This guide is set up in the following manner:

X. Symptom (Bold Type)

Any Special Instructions

1. Cause

a. Check / Remedy

Locate your symptom, check the causes (easiest listed first), then remedies. Repair as needed being sure to verify thatunit operates properly after any repairs.

C. Common Symptoms

A. AC indicator OFF

1. Switch at customer's main power panel in OFF (open) position.

a. Close main power switch.

2. Power Supply ON / OFF switch in OFF position.

a. Turn switch to ON.

3. Customer's main power line fuse(s) or circuit breaker(s) blown

a. Check main power panel fuse(s) and replace as required.

4. Actual input voltage does not correspond to voltage of unit

a. Verify that the input line voltage is correct. Refer to Section 2, Input Wiring Requirements.

5. Faulty components in unit

a. Return for repair or have qualified technician repair per Service Manual.


B. AC indicator flashing; Torch cannot be activated

1. System is in protective interlock mode. (User held torch trigger while turning on ON / OFF switch.)

a. Release torch trigger, set ON / OFF switch to OFF (down). Return ON / OFF switch to ON (up) position.

2. System is in protective interlock mode. (Torch parts are missing or loose.)

a. Release torch trigger, and set ON / OFF switch to OFF (down). Open main disconnect switch. Check torchparts, including O - rings on torch head. Refer to illustration in Section 5.03-C-E. Replace parts as needed.Reinstall shield cup; hand - tighten it securely against the torch head. Close main disconnect switch. Set ON/ OFF switch to ON (up) position.

3. System is in protective interlock mode. (Torch connection to power supply is loose.)

a. Release torch trigger, and set ON / OFF switch to OFF (down). Tighten torch connector to receptacle onpower supply securely. Do not use tools. Set ON / OFF switch to ON (up).

4. System is in protective interlock mode. (User removed shield cup from torch while power supply ON / OFF switch wasON.)

a. Release torch trigger, and set ON / OFF switch to OFF (down). Set ON / OFF switch to ON (up).

C. Torch will not pilot; AC indicator ON, Gas indicator OFF

1. Gas pressure below minimum for power supply operation

a. Set gas pressure to 65 psi / 4.5 bar

D. Torch will not pilot; AC indicator ON, Gas indicator ON (on system start-up); Gas indicator goes out

when user presses torch trigger

1. Gas pressure below minimum for torch operation

a. Set gas pressure to 65 psi / 4.5 bar

E. AC indicator flashing; Temp indicator flashing slowly

1. Fan disconnected or blocked.

a. Clear fan if blocked; let power supply cool off.

b. Connect wires to fan if necessary.


F. AC indicator ON; TEMP indicator ON

1. Air flow blocked

a. Check for blocked air flow around the unit and correct condition.

2. Fan blocked

a. Check and correct condition.

3. Unit is overheated

a. Let unit cool down for at least 5 minutes. Make sure the unit has not been operated beyond Duty Cycle limit.Refer to duty cycle data in Section 2.



G. Torch will not pilot when torch switch is activated; AC indicator ON, TEMP indicator OFF, DC

indicator OFF

1. System is in SET mode

a. Release torch trigger. Change power supply RUN/SET switch to RUN (up) position.

2. Torch Head upper O-ring in wrong position.

a. Remove shield cup from torch. Check position of upper O-ring. Correct if necessary.

Lower O-RingUpper O-Ring in Correct Groove

Upper Groove with Vent Holes Must Remain Open

Threads

A-03640

3. Faulty torch parts

a. Release torch trigger. Turn power supply OFF. Remove and inspect torch consumable parts. Replace ifnecessary.

4. Gas pressure too high or too low

a. Adjust to proper pressure.




H. No cutting output; Torch activated; AC indicator ON; Gas flows; Fan operates

1. Work cable not connected to work piece, or connection is poor

a. Make sure that work cable has a proper connection to a clean, dry area of the workpiece.



3. Faulty Torch

a. Return for repair or have qualified technician repair.

I. Low cutting output

1. Incorrect setting of CURRENT (A) control

a. Check and adjust to proper setting.



J. Limited output with no control

1. Poor input or output connections

a. Check all input and output connections.

2. Work cable connection to work piece is poor




K. Erratic or improper cutting output

1. Poor input or output connections

a. Check all input and output connections.

2. Poor work cable connection


3. Fluctuations in input power

a. Have electrician check input line voltage.

L. Difficult Starting

1. Worn torch parts (consumables)

a. Shut off input power. Remove and inspect torch shield cup, tip, starter cartridge, and electrode. Replaceelectrode or tip if worn; replace starter cartridge if end piece does not move freely; replace shield cup ifexcessive spatter adheres to it.


M. Arc shuts off during operation; arc will not restart when torch switch is activated.

1. Power Supply is overheated (TEMP indicator ON)

a. Let unit cool down for at least 5 minutes. Make sure the unit has not been operated beyond Duty Cycle limit.Refer to Section 2 for duty cycle specifications.

2. Fan blades blocked (AC indicator flashing; TEMP indicator flashing slowly)

a. Check and clear blades.

3. Air flow obstructed (AC indicator flashing; TEMP indicator ON)

a. Check for obstructed air flow around the unit and correct condition.

4. Gas pressure too low (GAS indicator OFF when torch switch is activated)

a. Check source for at least 65 psi / 4.5 bar; adjust as needed.

5. Torch consumables worn

a. Check torch shield cup, tip, starter element, and electrode; replace as needed.



N. No gas flow; AC indicator ON; Fan operates

1. Gas not connected or pressure too low

a. Check gas connections. Adjust gas pressure to proper setting.

2. Shield Cup not properly installed.

a. Check to see that Shield Cup is properly installed.



O. Torch cuts but not adequately

1. Current (A) control set too low

a. Increase current setting.

2. Torch is being moved too fast across workpiece

a. Reduce cutting speed.

3. Excessive oil or moisture in torch

a. Hold torch 1/8 inch (3 mm) from clean surface while purging and observe oil or moisture buildup (do notactivate torch). If there are contaminants in the gas, additional filtering may be needed.

Manual 0-2967 6-1 PARTS LISTS

SECTION 6:PARTS LISTS

6.01 Introduction

A. Parts List Breakdown

The parts list provides a breakdown of all replaceable components.

B. Returns

If a product must be returned for service, contact your distributor. Materials returned without proper authorizationwill not be accepted.

6.02 Ordering Information

Order replacement parts by catalog number and complete description of the part or assembly, as listed in the partslist for each type item. Also include the model and serial number of the torch. Address all inquiries to your autho-rized distributor.

6.03 Replacement Assemblies

The following items are included with the replacement power supply: input power cord and plug, work cable &clamp, gas pressure regulator / filter, and operating manual.

Qty Description Catalog #

1 Firepower FP-38 Power Supply with input power cord 1445-0084and 120 VAC, 20A plug

6.04 Power Supply Replacement Parts


1 Replacement Filter Element 9-4414

PARTS LISTS 6-2 Manual 0-2967

6.05 Options and Accessories


1 Multi-Purpose Cart (Not Shown) 1445-09131 Single - Stage Filter Kit (includes Filter & Hose) 1445-00801 Replacement Filter Body 9-77401 Replacement Filter Hose (not shown) 9-77422 Replacement Filter Element 9-7741

A-02476

FilterElement

(Cat. No. 9-7741)

Housing

Cover

BarbedFitting

Spring

Assembled FilterO-ring

Single - Stage Air Filter

Manual 0-2967 A-1 APPENDIX

APPENDIX 1: SEQUENCE OF OPERATION(BLOCK DIAGRAM)

ACTION

ON / OFF switchto OFF

RESULT

All indicators off.Power supply fan shuts off.

ACTION

RUN / SET switch to RUN.

RESULT

Gas flow stops.

ACTION

Torch moved within transfer distance of workpiece.

RESULT

Main arc transfers.Pilot arc off.

ACTION

Close externaldisconnect switch.

RESULT

Power to system.

ACTION

RUN / SET switch to SET.

RESULT

Gas flows to set pressure.GAS indicator on when input

pressure is adequate.

ACTION

Torch moved away from work (while

still activated).

RESULT

Main arc stops.Pilot arc automatically

restarts.

ACTION

ON / OFF switchto ON.

RESULT

AC indicator ON. Fan on.

Power circuit ready.

ACTION

Protect eyes and activate torch.

RESULT

Gas flows briefly,then stops.

Gas restarts.

DC indicator on. Pilot arc established.

A-03299

PILOT ARC

ACTION

Unplug inputpower cord or open externaldisconnect.

RESULT

No power to system.

ACTION

Release torch trigger.

RESULT

Main arc stops.Gas flow stops after post - flow.

ACTION

Connect work cableto workpiece.

Set output amperage

RESULT

System is readyfor operation.

APPENDIX A-2 Manual 0-2967

1/3 ff12

West Lebanon, NH USA 03784

Made in USA

Model:

U1 1 11max 1effI I

U2

3Ø 3Ø1Ø1Ø

S/N

U0 =

X

Standard Symbols

Ø

AC

DC

Phase

NOTES:1. Symbol shown indicates single- or three-phase AC input, static frequency converter-transformer-rectifier, DC output.2. Indicates input voltages for this power supply. Most power supplies carry a label at the input power cord showing input voltage requirements for the power supply as built. 3. Top row: Duty cycle values. Second row: Rated cutting current values. Third row: Conventional load voltage values.

I

A-03288

Output Range (Amperage/Voltage)

Type of PowerSupply (Note 1)

Output Current Type

Rated No-Load Voltage

Plasma Cutting Symbol

Manufacturer's Name and/orLogo, Location, Model andRevision Level, Serial Number and Production Code

ConventionalLoad Voltage

Regulatory Standard CoveringThis Type of Power Supply

Duty Cycle Data (Note 3)

Duty Cycle Factor

Input PowerSpecifications (Phase, AC or DCHertz Rating)

Input PowerSymbol

Rated Supply Voltage (Note 2)

Rated MaximumSupply Current

Maximum Effective Supply Current

Degree of Protection

Manufacturer's ElectricalSchematic File Numberand Revision Level

APPENDIX 2: DATA TAG INFORMATION

NOTE

Sections of the data tag may be applied inseparate locations on the Power Supply.


This page left blank.


APPENDIX 3: SYSTEM SCHEMATIC

1

1

2

2

3

3

4

4

A

B

C

D

E

F

AC

3

CURRENTCONTROL

1

2

1

MAIN PCB ASSEMBLY

1

2

J5

2

1

P5GAS

1

3

DC

FAN1

12

P4

TEMP

J4

2

2

M1

CURRENT ADJUST 20 - 30

RED

BLACK

19X1773

TS1

OVER-TEMP

FIL

TER

ING

PFC INDUCTOR

T1

BIASCONVERTER

LOGIC AND CONTROLCIRCUITRY

PS1PRESSURE SW

3

1P6

3

1J6

2

CW

P9 J9

D13

D16

D19

D7SW2

RUN

SET 1

2

J2

3

2

3

1P2

BR2

PANEL INDICATOR

(5)(6)

(7)

(8)

(9)

(10)(11)

ZERO

1 4

J7TEST

K1

12VDC

+

NORMALLY CLOSED

TEST POINTS:

TP1 LOGIC COMMONTP2 SHORT TO TP23 TO DISABLE BIAS SUPPLYTP6 SHORT TO TP24 TO DISABLE POWER

FACTOR CORRECTION

TP8 SHORT TO TP26 TO DISABLE SHORTED TORCH PROTECTION

(E14A)

(E16A)

(E15A)

(E12A)

(E16B)

(E12B)

(E14B)1

23

4

23BR1

41

E16A

Q8

-+

E14A

E15A

E12B

E13

E16B

E1

STUD

Q7

E11

-+

E15B

E2

D47

E14B

E12A

E18

A-03405

CAUTION: SOME PORTIONS OF THE CONTROL/LOGIC CIRCUITRY ARE CONNECTED TO THE INPUT LINE. CONNECTION TO A GROUNDEDINSTRUMENT COULD CAUSE A SHOCKHAZARD OR DESTROY THE POWER SUPPLY.ACCESS BY AN AUTHORIZED TECHNICIAN ONLY.

SW1(E1)

SW1

120/208/230V INPUT 50/60HZ

(E2)

L1

INPUT 230V ONLY

CHASSIS GND

EMCFILTERCE ONLY

2

(E15B)


5

5

6

6

7

7

8

8

9

9

10

10

A

B

C

D

E

F

SOL1

J3

1

22

TORCHSWITCH

2

(13)

P1

1

J1

T

3

(12) WORKP3

1

O

A

GAS SOLENOID

CH

1

1B

R

4

2

COMP DESCRIPTION

SW1SW2

M1 FAN, 4.5" 12VDCD2

PS1 PRESSURE SWITCHSOL1 GAS SOLENOID

SWITCH, ON/OFFSWITCH, RUN/SET

T3

TS1

GCW

OVER-TEMP. SENSOR

L1 OUTPUT INDUCTOR

MAIN TRANSFORMER

L1

OUTPUT INDUCTOR

D22

D99

TORCH SWITCH ON

PWM ON

+14VA AGND+12VB BGND

T3

SECPRI

MAIN

TORCH

PILOT

WORK

44

33

PIP

C1D1D9

A8A7

B2D1

PFC INDUCTORT1

(E8)

(14)

(15)

o

o

P8J8

4

3

1

2

QUICK DISCONNECT

5

(E4)

(-)

REL ECO 100213 GCW 7/29/02AA

42X1089Thursday, March 20, 2003

1 1

INDUSTRIAL PARK No. 2W EST LEBANON, NH 03784603-298-5711

CM38 120/208/230V SINGLE PHASE 50/60 Hz

Tuesday, May 15, 2001

15:05:29

THERMAL DYNAMICS

CDWG No:

Sheetof

SupersedesScale

Date:

Drawn: References

DateByRevisionsRev PCB No:

Assy No:

Information Proprietary to THERMAL DYNAMICS CORPORATION.Not For Release, Reproduction, or Distribution without Written Consent.

NOTE:Unless Otherwise Specified, Resistors are in Ohms 1/4W 5%.Capacitors are in Microfarads (UF) Chk: App:

TITLE:

Last Modified:

SizeSCHEMATIC,

E4E5

D55

E10

E19

Q11

E20

D53C70, 72, 81C71, 73, 75 E8

E9

Q13

D54

E6

D56

Q12

A-03405

REL ECO 100333 GCW 10/04/02AB

REL ECO 100535 DAT 2/27/03AC

2

A4

LOCATION