Chicago Electric 91979 Operating Instructions Manual

Brand: Chicago Electric

Model: 91979

Type: Operating Instructions Manual

Chicago Electric 91979 is a compact powder coat oven designed for baking powder coat materials and preheating parts. It features a compact design, making it suitable for use in smaller workspaces. With a single 500-watt heater block and a temperature range of 90-480° F, it provides precise temperature control for various powder coating applications. The oven's interior dimensions of 11-3/4" W x 14-3/4" H x 12” D allow for ample space to accommodate small to medium-sized parts. Additionally, the oven is equipped with a UL®-listed cord, plug, and thermostat switch for safety and reliability.

ASSEMBLY & OPERATING INSTRUCTIONS

91979

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web Site at www.harborfreight.com

2004 by Harbor Freight Tools

any artwork contained herein may be reproduced in any shape or form without the

express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353.

COMPACT POWDER COAT OVEN

SKU 91979 For technical questions, please call 1-800-444-3353. Page 2

THANK YOU for choosing a HARBOR FREIGHT TOOLS product. For future reference, please

complete the owner’s record below:

Model

______________ Serial No._____________ Purchase Date_______________

SAVE THE RECEIPT, WARRANTY AND THESE INSTRUCTIONS. It is important that you read the

entire manual to become familiar with the unit BEFORE you begin assembly.

The Compact Powder Coat Oven features a compact design for use in baking powder coat materi-

als and preheating parts. The Compact Powder Coat Oven is for use on non-volatile carbons and

solvent based materials.

Technical Specifications

Outside Dimensions: 23-1/4" H x 14-5/8" W x 14-3/4" D

Inside Diameter: 11-3/4" W x 14-3/4" H x 12” D

Heater Block: Single 500 Watt

Cord, Plug and Thermostat Switch: UL

Listed

Power Source: 120 Volt, 60 Hz

Cord: 18 AWG x 3c

Heat Range: 90-480° F

Safety Warnings and Precautions

WARNING: When using product, basic safety precautions should always be followed to

reduce the risk of personal injury and damage to equipment.

Read all instructions before using this product!

WORK AREA

1. Keep your work area clean and well lit. Cluttered benches and dark areas invite

accidents.

2. Do not operate the Oven in explosive atmospheres, such as in the presence of

flammable liquids, gases, or dust. Electrical products create sparks which may ignite the

dust or fumes.

3. Keep bystanders, children, and visitors away while operating the Oven.

Distractions can cause you to lose control. Protect others in the work area from debris.

Provide barriers or shields as needed.

ELECTRICAL SAFETY

4. Grounded products must be plugged into an outlet properly installed and grounded in

accordance with all codes and ordinances. Never remove the grounding prong or

modify the plug in any way. Do not use any adapter plugs. Check with a qualified

electrician if you are in doubt as to whether the outlet is properly grounded. If the

Oven should electrically malfunction or break down, grounding provides a low resistance

SKU 91979 For technical questions, please call 1-800-444-3353. Page 3

path to carry electricity away from the user.

5. Double insulated products are equipped with a polarized plug (one blade is wider

than the other). This plug will fit in a polarized outlet only one way. If the plug does

not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified

electrician to install a polarized outlet. Do not change the plug in any way. Double

insulation

eliminates the need for the three wire grounded power cord and grounded

power supply system.

6. Avoid body contact with grounded surfaces such as pipes, radiators, ranges, and

refrigerators. There is an increased risk of electric shock if your body is grounded.

7. Do not expose the Oven to rain or wet conditions. Water entering the Oven will

increase the risk of electric shock.

8. Do not abuse the Power Cord. Never use the Power Cord to carry the Oven or pull the

Plug from an outlet. Keep the Power Cord away from heat, oil, sharp edges, or

moving parts. Replace damaged Power Cords immediately. Damaged Power Cords

increase the risk of electric shock.

9. When operating a power tool outside, use an outdoor extension cord marked “W-A”

or “W”. These extension cords are rated for outdoor use, and reduce the risk of electric

shock.

PERSONAL SAFETY

10. Stay alert. Watch what you are doing, and use common sense when operating the

Oven. Do not operate the Oven while tired or under the influence of drugs, alcohol, or

medication. A moment of inattention while operating the Oven may result in serious

personal injury.

11. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your

hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair

can be caught in moving parts.

12. Avoid accidental starting. Be sure the electrical cord is unplugged when not in use.

13. Remove adjusting keys or wrenches before turning the Oven on. A wrench or a key

that is left inside the oven invites accidents and/or property damage.

14. Do not overreach. Keep proper footing and balance at all times. Proper footing and

balance enables better control of the power tool in unexpected situations.

15. Use safety equipment. Always wear eye protection. Dust mask, nonskid safety shoes,

hard hat, or hearing protection must be used for appropriate conditions.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 4

TOOL USE AND CARE

16. Do not use the Oven if the thermostat does not turn it on or off properly. Any

appliance that cannot be controlled with the Power Switch is dangerous and must be

replaced.

17. Disconnect the Power Cord Plug from the power source before making any

adjustments or doing maintenance on the Oven. Such preventive safety measures

reduce the risk of starting the tool accidentally.

18. Maintain the Oven with care. Do not use a damaged Oven. Tag damaged Oven “Do not

use” until repaired.

19. Never attempt to use the Oven if it is not working properly. If any discrepancy is noted,

have the Oven serviced immediately.

SERVICE

20. Oven service must be performed only by qualified repair personnel. Service or

maintenance performed by unqualified personnel could result in a risk of injury.

21. When servicing the Oven, use only identical replacement parts. Follow instructions in

the

“Inspection, Maintenance, And Cleaning”

section of this manual. Use of

unauthorized parts or failure to follow maintenance instructions may create a risk of electric

shock or injury.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 5

GROUNDING

GROUNDED TOOLS: TOOLS WITH THREE PRONG PLUGS

1. Tools marked with “Grounding Required” have a three wire cord and three prong grounding

plug. The plug must be connected to a properly grounded outlet. If the Oven should

electrically malfunction or break down, grounding provides a low resistance path to carry

electricity away from the user, reducing the risk of electric shock. (See Figure A.)

2. The grounding prong in the plug is connected through the green wire inside the cord to the

grounding system in the tool. The green wire in the cord must be the only wire connected to

the Oven’s grounding system and must never be attached to an electrically “live” terminal.

(See Figure A.)

3. Your Oven must be plugged into an appropriate outlet, properly installed and grounded in

accordance with all codes and ordinances. The plug and outlet should look like those in the

following illustration. (See Figure A.)

WARNING!

Improperly connecting the grounding wire can result in the risk of electric shock. Check with

a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Do not

modify the power cord plug provided with the Oven. Never remove the grounding prong from

the plug. Do not use the Oven if the power cord or plug is damaged. If damaged, have it

repaired by a service facility before use. If the plug will not fit the outlet, have a proper outlet

installed by a qualified electrician.

FIGURE A

DOUBLE INSULATED APPLIANCES: APPLIANCES WITH TWO PRONG PLUGS

4. Appliances marked “Double Insulated” do not require grounding. They have a special double

insulation system which satisfies OSHA requirements and complies with the applicable

standards of Underwriters Laboratories, Inc., the Canadian Standard Association, and the

National Electrical Code. (See Figure B.)

5. Double insulated tools may be used in either of the 120 volt outlets shown in the following

illustration. (See Figure B.)

SKU 91979 For technical questions, please call 1-800-444-3353. Page 6

EXTENSION CORDS

Grounded

appliances require a three wire extension cord.

Double Insulated

products can

use either a two or three wire extension cord.

2. As the distance from the supply outlet increases, you must use a heavier gauge extension

cord. Using extension cords with inadequately sized wire causes a serious drop in voltage,

resulting in loss of power and possible tool damage. (See Figure C,

next page.)

3. The smaller the gauge number of the wire, the greater the capacity of the cord. For example,

a 14 gauge cord can carry a higher current than a 16 gauge cord. (See Figure C.)

4. When using more than one extension cord to make up the total length, make sure each cord

contains at least the minimum wire size required. (See Figure C.)

5. If you are using one extension cord for more than one tool, add the nameplate amperes and

use the sum to determine the required minimum cord size. (See Figure C.)

6. If you are using an extension cord outdoors, make sure it is marked with the suffix “W-A” (“W”

in Canada) to indicate it is acceptable for outdoor use.

7. Make sure your extension cord is properly wired and in good electrical condition. Always

replace a damaged extension cord or have it repaired by a qualified electrician before using it.

8. Protect your extension cords from sharp objects, excessive heat, and damp or wet areas.

FIGURE B

FIGURE C

SKU 91979 For technical questions, please call 1-800-444-3353. Page 7

Specific Product Warnings and Precautions

1. Do not use the Oven if under the influence of alcohol or drugs. Read warning

labels on prescriptions to determine if your judgement or reflexes are impaired while taking

drugs. If there is any doubt, do not set up or use the Oven.

2. Do not allow anyone to conduct any activities near the Oven while it is in use, or

following its use while it is still hot.

3. Do not use the Oven in areas near flammable chemicals, dusts and vapors.

4. The Oven should be placed on a fire retardant table or stand (not included)

approximately 36" above the floor level and should be protected from direct sunlight

or drafts. Make certain that the table or stand is flat, level, sturdy and capable of supporting

the weight of the Oven and objects being heated.

5. Wear heavy work gloves when touching the Oven or hot materials and

objects.

SPECIFIC SAFETY RULES

1. Maintain labels and nameplates on the Oven. These carry important information. If

unreadable or missing, contact Harbor Freight Tools for a replacement.

2. Always wear safety impact eye goggles and heavy work gloves when using the Oven.

Using personal safety devices reduce the risk for injury. Safety impact eye goggles and

heavy work gloves are available from Harbor Freight Tools.

3. Maintain a safe working environment. Keep the work area well lit. Make sure there is

adequate surrounding workspace. Always keep the work area free of obstructions, grease,

oil, trash, and other debris. Do not use the Oven in areas near flammable chemicals, dusts,

and vapors. Do not use this product in a damp or wet location.

4. Avoid unintentional starting. Make sure you are prepared to begin work before turning on

the Oven.

5. Never leave the Oven unattended when it is plugged into an electrical outlet. Tur n off

the Oven, and unplug it from its electrical outlet before leaving.

6. Always unplug the Oven from its electrical outlet before performing any inspection,

maintenance, or cleaning procedures.

7. Warning! People with pacemakers should consult their physician(s) before using this

product. Operation of electrical equipment in close proximity to a heart pacemaker could

cause interference or failure of the pacemaker.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 8

6. Never attempt to move the oven while it is hot.

7. Keep a fire extinguisher close at hand. Always keep a fully charged, commercial fire

extinguisher nearby the Oven in case of accidental fire.

8. Never leave the Oven unattended once it is turned ON. Turn off the Oven, and wait

until it has completely cooled before leaving.

9. Prior to turning ON the Oven, make sure to remove all tools and equipment from

inside the Oven.

10. Do not clean the Oven with cleaners that are combustible or corrosive.

11. Always unplug the Oven from its electrical supply source before performing any

inspection, maintenance, or cleaning procedures.

12. Make sure to read and understand all instructions and safety precautions as outlined

in the powder coating manufacturer’s manual.

WARNING: The warnings, cautions, and instructions discussed in this instruction manual cannot

cover all possible conditions and situations that may occur. It must be understood by

the operator that common sense and caution are factors which cannot be built into

this product, but must be supplied by the operator.

WARNING: People with pacemakers should consult their physician (s) before using this product.

Operation of electrical equipment in close proximity to a heart pacemaker could

cause interference or failure of the pacemaker.

WARNING: This product contains or, when used, produces a chemical known to the State of

California to cause cancer and birth defects or other reproductive harm. (California

Health & Safety Code 25249.5, et seq.)

Assembly/ Operation

Your Compact Powder Coat Oven comes completely assembled. It is important that you read the

entire manual to become familiar with the product BEFORE you use the Oven. Before using the

Oven be sure that you have all parts described in the Parts List and Assembly Diagram located on

the last pages of this manual.

1. Open the Oven Door and place the powder coated object on the floor of the Oven.

2. Close the Oven Door (6). Close the Adjustable Vent (7) located on the side of the Oven by

sliding the Adjustable Vent cap over the hole-see Figure 1 on the next page. Make sure the

cap is snugly in place.

3. Turn the Thermostat (1) to the desired temperature setting as recommended by the

manufacturer of the powder coating material-see Figure 2-next page. The temperature can

be set at a temperature between 0 and 480 degrees.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 9

Adjustable Vent (7)

Figure 1

Thermostat (1)

Figure 2

4. When the Oven is plugged in the Mains ON Indicator Light (2) will illuminate. When the

Thermostat (1) is turned to any temperature the Heater ON Indicator Light (3) will illuminate.

5. Depending on the temperature set on the Thermostat (1), it may take up to one hour for the

Oven to reach and stabilize at the desired temperature. Once the Oven reaches the desired

temperature the Heater ON Indicator Light (3) will go off.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 10

6. Typically, the complete Oven cycle time for a powder coated object is obtained by adding the

“heating up” time, and the “dwell” time. The heating up time is the time it takes for the Power

coated object to reach the desired temperature. The dwell time is the time required for the

powder to cure properly. To obtain the complete Oven cycle time, consult the manufacturer’s

manual of the object being powder coated.

7. Note the time until the Oven cycle time is completed. Once the cycle time is complete, turn

the Thermostat (1) to the OFF position. Open the Adjustable Vent (7) and allow the Oven to

cool.

8. After allowing considerable time for the Oven and the powder coated object to cool, open the

Oven Door (6). Carefully remove the powder coated object from the oven, and unplug the

electrical plug.

Replacing the Heater Element

CAUTION: Always disconnect the Oven from its electrical supply source and allow the Oven to

completely cool before performing any inspection, maintenance, or cleaning.

1. The Heater Element (8) is easily replaceable but it will still need to be serviced by a qualified

technician. Only a qualified service technician should perform the following steps:

Make certain that the Oven is unplugged. Make certain that the Oven has not been used for

a considerable amount of time and that it is completely cool.

2. Open the Front Door (6). Remove the perforated tray at the bottom of the Oven by

unscrewing the four screws. The Heater is located beneath the bottom tray.

3. Unclamp the Heater. Turn the Oven upside down. Because of the weight of the Oven, it is

recommended that two people lift and turn the Oven upside down.

4, Unscrew the Screws holding the bottom cover in place. Remove the connecting wires from

both ends of the Heater Element (8).

5. Replace the existing Heater Element (8) with a new one.

6. Replace the connecting wires at each end of the Heater Element (8). Replace the

bottom cover and thread the screws back into place. Clamp the Heater back into place. Turn

the Oven right side up. Replace the perforated tray at the bottom of the Oven and

thread in all four screws.

7. To test the Oven, see the Inspection, Maintenance and Cleaning section of this

manual.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 11

Replacing the Thermostat

The Thermostat body is located on the front panel of the Oven. The Thermostat is made up of the

Thermostat Body, Knob, the tubing and internal wiring. It will need to be serviced by a qualified

service technician. Only a qualified service technician should perform the following steps:

1. Turn the Oven upside down. Because of the weight of the Oven, it is recommended that two

people lift and turn the Oven upside down.

2. Open the Front Door (6). Remove the perforated tray at the bottom of the Oven by

unscrewing the four screws. The Heater is located beneath the bottom tray.

3. Remove the two Fixing Screws located below the Thermostat Knob.

4. To access the Thermocoupler, the back inside cover will have to be removed and the

fiberglass taken out. For safety always wear heavy duty work gloves and a mask when

handling fiberglass insulation.

5. Unscrew the six screws provided on the back inside cover above the bottom perforated

tray.

6. Remove the connecting wires from the terminals on the Thermostat Body. Once you have

done this you can remove the Thermocoupler and Thermostat Body.

7. Follow steps 1-6 in reverse order to reassemble the Oven.

8. To test the Oven, see the Inspection, Maintenance and Cleaning section of this manual.

Inspection, Maintenance and Cleaning

1. Disconnect the Power Cord Plug from the power source before making any

adjustments, changing accessories, or storing the tool. Such preventive safety

measures reduce the risk of electric shock.

2. Before each use inspect the general condition of the Oven. Check for loose screws,

misalignment or binding of moving parts, cracked or broken parts, damaged power plug/Cord

and any other condition that may affect the safe operation of the Oven. If abnormal noise or

vibration occurs, immediately disconnect the Oven form its electrical supply source and have

the problem corrected before further use. DO NOT USE DAMAGED EQUIPMENT.

3. Periodically, a measurement of oven temperatures should be performed to ensure that the

Oven is properly operating.

4. To test the Oven Thermostat (5) for proper functioning, a thermometer (not provided) which

is of a commercial grade, and previously tested and approved, should be placed in the

center of the Oven floor. Close the Oven Door (6) and close the Adjustable Vent (7) located

on the side of the Oven. Turn the Thermostat (5) ON to 450 degrees Fahrenheit. The

Thermostat (5) may be tested at any stage during this procedure. To test the Thermostat,

compare the temperature readings on the Thermostat and the thermometer that was

placed inside the Oven. If the two thermometer readings are not the same, the Thermostat

should be adjusted. Only a qualified service technician should perform adjustments or

replace the Thermostat.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 12

5. To test the heating up time: Close the Oven Door (6) and close the Adjustable Vent (7)

located on the side of the Oven. Turn the Thermostat to its ON position and set the

Thermostat for 450 degrees. To test the heating up time (also called the “bring up time”)

simply observe the Thermostat (5) and use a watch (not included) to record the time it

takes for the Oven to reach a desired temperature.

6. To test the temperature drift: Close the Oven Door (6) and close the Adjustable Vent (7).

Turn the Thermostat to the ON position and set the Thermostat at 450 degrees. To test the

temperature drift (any variation in the preset temperature), the reading on the Thermometer

should be recorded once every hour for a period of eight hours. The temperature drift

should not exceed + or - 10 degrees. If the temperature drift exceeds + or - 10 degrees, a

qualified technician should check the Thermostat (3).

7. To test the temperature recovery time: A thermometer (not provided) which is of a

commercial grade, and previously tested and approved, should be placed in the center of the

Oven floor. Close the Oven Door and close the Adjustable Vent (7). Turn the Thermostat to

450 and allow sufficient time for the Oven temperature to reach 450 degrees. Open the

Oven Door and leave the Door open for exactly one minute. Then, close the Oven Door and

observe the Thermometer. Within thirty minutes after the Oven Door has been closed the

Thermometer should read 450 degrees. If the temperature recovery time does not reach 450

degrees within 30 minutes, a qualified technician should check the Oven for proper

functioning.

8. To test for temperature overshoot: Place a thermometer (not included) in the center of the

Oven floor. Close the Oven Door (6) and close the Adjustable Vent (7). Set the Thermostat

to any temperature up to 480 degrees. Every five minutes record the temperature reading on

the thermometer. Note the point at which the degree reading approaches, settles and does

not fluctuate. The maximum temperature recorded should not exceed ten degrees

Fahrenheit over the number of degrees the Thermostat is set at. If the temperature

overshoot exceeds ten degrees, a qualified service technician should check the Thermostat

(5) and Oven for proper functioning.

To clean: Wipe with a damp cloth, using a mild detergent or mild solvent. Do not use cleaners

that are combustible or corrosive.

Schematic Parts List

See the next page for Parts list and description.

SKU 91979 For technical questions, please call 1-800-444-3353. Page 13

Part # Description

1 Heater 500 Watts (not shown)

2 Mains ON Indicator Light

3 Heater ON Indicator Light

4 Plug/Cord (not shown)

5 Thermostat

6 Oven Door

7 Adjustable Vent

8 Heater Element (not shown)

Parts Diagram

Note: Some parts are listed and shown for illustration purposes only and are not available

individually as replacement parts.

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS

A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY

REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE

ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE

PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS

AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS

AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER

REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR

HER INSTALLATION OF REPLACEMENT PARTS THERETO.

1- (not shown)

4- (not shown)

8- (not shown)

Parts List

Chicago Electric 91979 Operating Instructions Manual

Chicago Electric 91979 Operating Instructions Manual

Chicago Electric 91979 Operating Instructions Manual

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