Despatch LAC2-12-6 User Manual

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL

ULTRAFLEX DRYING AND FIRING FURNACE

MODELS 1000, 3615, 3630, 3640

C-204 VERSION 10

10/2008

LAC-6 SERIES OVEN

OWNER’S MANUAL

C-194 PN 150138 VERSION 16 3/2011

Version 106 1

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ABOUT THIS MANUAL LAC Series Oven Owner’s Manual

Revision

Date

Author

Description

B

Updated contents of Drawings Section Updated Protocol Plus instructions

C

Added “Operating Environment” note to Operating section. Updated drawings. Modified Preface

D

Modified per Rev C Protocol Plus software

E

Various corrections

F

Updated drawings

G

Updated Despatch warranty.

H

Updated drawing

I

Update to Protocol Plus Version 4

J

Ref. CAR 1165C

K

Changes to Unpacking and Inspection

L

Changed drawings

M

Revised Protocol numbers. Updated Despatch address N

Updated warranty

O

Updated Protocol Plus Section

16

3/2011

K. Livingston

Revise format.

2 Version 10

Revision History

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL Version 106 3

Table of Contents

1. About This Manual ................................................................................................. 5

1.1. Important User Information .......................................................................... 5

1.2. Manufacturer & Service ................................................................................ 6

1.3. Organization of this Manual ......................................................................... 6

1.4. Conventions .................................................................................................. 7

1.5. Specifications ................................................................................................ 8

1.5.1. Dimensions ................................................................................................ 8

1.5.2. Capacities .................................................................................................. 9

1.5.3. Power ....................................................................................................... 10

1.5.4. Temperature ............................................................................................ 11

2. Safety .................................................................................................................... 12

2.1. Safety Information ...................................................................................... 12

2.1.1. Lockout.................................................................................................... 12

2.1.1.1. Lockout Requirements ......................................................................... 12

2.1.1.2. Lockout Procedure ............................................................................... 12

2.1.2. Door and Panel ........................................................................................ 13

2.2. Maintenance ................................................................................................ 13

2.3. Electrical Power .......................................................................................... 13

2.4. Fire .............................................................................................................. 14

2.5. Equipment Lockout Requirements ............................................................. 15

2.5.1. Emergency Stop ...................................................................................... 15

3. Theory of Operation .............................................................................................. 16

3.1. The LAC-6 Series Oven.............................................................................. 16

3.2. Damper Control .......................................................................................... 17

3.2.1. Determining Damper Settings ................................................................. 17

3.2.1.1. Damper Full-Closed Position .............................................................. 17

3.2.1.2. Damper Full-Open Position ................................................................. 17

3.2.1.3. Other Damper Settings ........................................................................ 18

3.3. The Protocol Plus Controller ...................................................................... 19

4. Assembly & Setup ................................................................................................ 20

4.1. Unpack & Inspect the LAC-6 Series Oven ................................................. 20

4.1.1. If Damaged During Shipping .................................................................. 20

4.2. Set-up the LAC-6 Series Oven ................................................................... 20

4.2.1. Select Oven Location/Operating Environment ....................................... 20

4.2.2. Set-up Procedure ..................................................................................... 21

4.2.3. Wiring & Power Connections ................................................................. 22

4.2.3.1. Wire LAC-6 Models 2-12 and 2-18 .................................................... 23

4.3. MRC5000 Setup (Optional) ........................................................................ 25

5. Operation............................................................................................................... 26

5.1. Load Oven ................................................................................................... 26

5.2. Pre-Startup Checklist .................................................................................. 27

5.3. Operating Procedure ................................................................................... 28

5.3.1. Start Oven ................................................................................................ 28

5.3.2. Working with Protocol Plus Operating Modes ....................................... 28

6. Maintenance .......................................................................................................... 29

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ABOUT THIS MANUAL LAC Series Oven Owner’s Manual

4 Version 10

6.1. Checklist ..................................................................................................... 29

6.2. Lubrication .................................................................................................. 30

6.3. Routine Tests .............................................................................................. 30

6.4. Door Adjustment ......................................................................................... 30

6.5. Replacement Parts ....................................................................................... 30

6.5.1. Replace the Protocol Plus Controller ...................................................... 31

6.5.2. Replace Heater Unit ................................................................................ 31

6.5.3. Replace Fan Motor .................................................................................. 32

7. Troubleshooting .................................................................................................... 34

7.1. Troubleshooting Error Messages and Alarms............................................. 34

7.2. Troubleshooting Symptoms ........................................................................ 34

8. Appendices ............................................................................................................ 36

8.1. Standard Products Warranty ....................................................................... 36

8.2. Electrical Schematics .................................................................................. 37

Figures

Figure 1. LAC High-performance Bench-top Oven. ........................................................ 16

Figure 2. Horizontal Airflow through the LAC Oven. ..................................................... 16

Figure 3. Damper Positions............................................................................................... 17

Figure 4. Protocol Plus Displays and Control Buttons. .................................................... 19

Figure 5. LAC-6 Series Oven Nameplate. ........................................................................ 22

Figure 6. Rear Access Panel for Hard-Wired Connections. ............................................. 23

Figure 7. Hinged Panel for Simpler Access to Power Connections. ................................ 23

Figure 8. Power Connections at Main Circuit Board. ....................................................... 24

Figure 9. Remove Screws to Remove Floor Plate. ........................................................... 31

Figure 10. Heater Panel and Inlet Cone. ........................................................................... 31

Figure 11. Remove Screws to Remove Side Panels. ........................................................ 32

Figure 12. Remove Heater Panel by Removing Screw in Front Edge of Each Panel. ..... 32

Figure 13. LAC1-10-6 (Excerpt from drawing 146271D01)............................................ 38

Figure 14. LAC1-38A-6 (Excerpt from drawing 146273D01). ........................................ 38

Figure 15. LAC1-38B-6 (Excerpt from drawing 146275D01). ........................................ 38

Figure 16. LAC1-67-6 (Excerpt from drawing 146277D01)............................................ 38

Figure 17. LAC2-12-6 (Excerpt from drawing 146279D01)............................................ 38

Figure 18. LAC2-18-6 (Excerpt from drawing 146281E01). ........................................... 38

Tables

Table 1. MRC 5000 Settings. ............................................................................................ 25

Table 2. Error Messages and Next Steps. ......................................................................... 34

Table 3. Troubleshooting Oven Symptoms. ..................................................................... 35

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL



Values displayed on screens are examples only. Though those values may be typical, contact Despatch Industries for the final value.



Users of this equipment must comply with operating procedures and training of operation personnel as required by the Occupational Safety and Health Act (OSHA) of 1970, Section 6 and relevant safety standards, as well as other safety rules and regulations of state and local governments. Refer to the relevant safety standards in OSHA and National Fire Protection Association (NFPA), section 86 of 1990.

Version 106 5

1. About This Manual

1.1. Important User Information

All rights reserved. No part of the contents of this manual may be reproduced, copied, or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of the publisher, unless it is for the purchaser's personal use.

Printed and bound in the United States of America.

The information in this manual is subject to change without notice and does not represent a commitment on the part of Despatch Industries. Despatch Industries does not assume any responsibility for any errors that may appear in this manual.

In no event will Despatch Industries be liable for technical or editorial omissions made herein, nor for direct, indirect, special, incidental, or consequential damages resulting from the use or defect of this manual.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ABOUT THIS MANUAL LAC Series Oven Owner’s Manual

Danger!

Only fully-trained and qualified personnel should setup and maintain this equipment. Improper setup and operation of this equipment could cause an explosion that may result in equipment damage, personal injury or possible death.

Global Headquarters

Contact

Service & Technical Support

Despatch Industries

8860 207th Street Lakeville, MN 55044 USA

International/Main: 1-952-469-5424 US toll free: 1-888-337-7282 Fax: 1-952-469-4513 info@despatch.com www.despatch.com

Service: 1-952-469-8230 US toll free: 1-800-473-7373 Service @despatch.com

6 Version 10

The information in this document is not intended to cover all possible conditions and situations that might occur. The end user must exercise caution and common sense when installing or maintaining Despatch Industries products. If any questions or problems arise, call Despatch Industries at 1-888-DESPATCH or 1-952-469-5424.

1.2. Manufacturer & Service

The LAC-6 Series Oven is manufactured by Despatch Industries.

Despatch has specialized in thermal processing for over 100 years. Technical expertise gained over those years helps provide innovative solutions to critical applications in vertical markets and cutting edge technology worldwide. Despatch products are backed by a drive for long-term customer satisfaction and a strong sense of responsibility. The worldwide network of factory-trained Service Professionals is available to support your Despatch equipment. From full service preventive maintenance to routine repair and certified calibration and uniformity, the Despatch service network is positioned to respond to your business needs. Our service programs are customized to meet your specific needs using our Advantage Service Assurance Program (ASAP). For more information on ASAP, visit www.despatch.com.

1.3. Organization of this Manual

This owner’s manual contains the most comprehensive set of information for the Despatch LAC-6 Series ovens, including installation instructions, theory of operation, operating instructions, among other things.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL

Danger!

Failure to heed warnings in this instruction manual and on the oven could result in personal injury, property damage or death.



This icon signifies important information.

This icon signifies information that describes an unsafe condition that may result in death, serious injury, or damage to the equipment.

Danger!

A condition that may result in death, serious injury, or damage to equipment.

Warning!

A condition that may result in serious injury or damage to equipment.

Caution!

A condition that may result in damage to equipment or product.

LOG OUT

Reversed-out, Bold, 10pt Arial typeface indicates a specific key or button on screen to click.

Version 106 7

1.4. Conventions

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ABOUT THIS MANUAL LAC Series Oven Owner’s Manual

LAC

Model

No.

Chamber Size

in (cm)

Capacity

feet

3

(liters)

Overall Size

in (cm)

Max.

Number of

Shelf

Positions

Exhaust Diameter

Located on Back

of Chamber

in (cm)

W0F* D H W D

H

1-10

13.75 (35)

12

(28)

12

(31) 1 (33)

23

(58)

19

(48)

29.5 (75)

5

1

(2.5)

1-38A

18.75 (48)

18

(46)

19

(48)

3.7

(105)

28

(71)

25

(64)

35.5 (90)

9

2½

(6.4)

1-38B

18.75 (48)

18

(46)

19

(48)

3.7

(105)

28

(71)

25

(64)

35.5 (90)

9

2½

(6.4)

1-67

23.75 (60)

20

(51)

24

(61)

6.6

(187)

36

(91)

27

(69)

40.5

(103)

11

2½

(6.4)

2-12

23.75 (60)

24

(61)

36

(91)

12

(340)

36

(91)

31

(79)

52.5

(133)

17

2 x 2½

(6.4)

2-18

35.25 (91)

24

(61)

36

(91)

18

(510)

47

(119)

29.5 (75)

52.5

(133)

17

2 x 2½

(6.4)



The LAC-6 oven is not intended to process solvents or other volatile or flammable materials. Oven exhaust is intended for cooling purposes only.

Warning!

Do not place this oven in an environment harmful to electrical components.

Placing this oven in an environment detrimental to electrical components (for example, environments where carbon fibers, coal dust or similar contaminants may be present) may result in component failure.

Contact Despatch for options available to help prevent such failures.

8 Version 10

1.5. Specifications

1.5.1. Dimensions

*

Allow 0.375" (0.95 cm) clearance on each side for shelf supports (3/4 in (1.9 cm) total).

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL

LAC-6 Model Number

1-10-6

1-38 A-6

& B-6

1-67-6

2-12-6

2-18-6

Maximum Load

Lbs (Kg)

150 (68)

175 (79)

250 (113)

300 (136)

Maximum Shelf Load

Lbs (Kg)

50 (23)

Exhaust

CFM

(LPS)

Adjustable

to 5

(2.4)

Adjustable

to 12

(5.6)

Adjustable

to 12

(5.6)

Adjustable

to 30

(14.2)

Adjustable

to 40

(18.9)

Recirculating Fan

CFM

(LPS)

150 (71)

300

(141)

300

(141)

600

(282)

600

(282)

H.P.

1/25 ¼ ¼

¼ x 2

Approx. Weight Net

Lbs

(KG)

110 (50)

185 (84)

255

(116)

360

(163)

450

(204)

Shipping Weight

Lbs

(KG)

175 (79)

270

(123)

360

(163)

480

(218)

600

(272)

Version 106 9

1.5.2. Capacities

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ABOUT THIS MANUAL LAC Series Oven Owner’s Manual

Model

Volts

Amps

Hertz

Phase

Heater

KW

Cord and Plug

LAC 1-10-6

120

10.0

50/60 1 1

Included, 15 Amp (NEMA 5-15)

LAC 1-38A-6

120

16.5

50/60

1

1.6

Included, 20 Amp (NEMA 5-20)

LAC 1-38B-61F†

240

9.5

50/60

1

1.8

Included, 15 Amp (NEMA 6-15)

LAC 1-67-6†

240

12.0

50/60

1

2.4

Included, 15 Amp (NEMA 6-15)

LAC 2-12-6†

2F

‡

240

18.5

50/60

1

3.6

None, Hardwired

LAC 2-18-6† ‡

240

23.5

50/60

1

4.8

None, Hardwired

10 Version 10

1.5.3. Power

If the line voltage for your LAC-6 Series Oven varies more than 10% from the oven voltage rating, electrical components such as relays and temperature controls may operate erratically.

If the line voltage is lower than the oven voltage rating, heat-up time may be

significantly longer and motors may overload or run hot

If the line voltage is higher than the nameplate rating, motors may run hot and draw

excessive amperage

†

The LAC Series Oven designed for 240 volts (see oven nameplate) will operate satisfactorily on a minimum of 208 Volts, but will result in 25% reduced heater output. If your power characteristic is lower, contact Despatch Industries. An option is available to regain the full heater power when operating on 208V.

‡

The LAC 2-12 and LAC 2-18 must be hardwired to the electric supply using 10 AWG or larger wires suitable for at least 75 °C (167 °F).

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ABOUT THIS MANUAL

LAC-6 Model Number

1-10

1-38 A

1-38 B

1-67

2-12

2-18

Time to Temperature 40 °C – 100 °C (approximate minutes 40 °C – 200 °C with no load) 40 °C – 260 °C

8 25 40

9

32 60

6

22 36

6

20 34

6

19 31

4

17 29

Recovery Time - Door Open 100 °C One Minute (approximate 200 °C minutes with no load) 260 °C

1

3

7

1 6

14

1 4 8

1 3 5

1 6 9

1 4 8

Temperature Uniformity at 100 °C3F§ 200 °C§ 260 °C§

± 1 °C ± 2 °C

± 2.5 °C

Operating Range with 20 °C Ambient

40 °C – 260 °C

Control Stability

± 0.5 °C per 5 °C change in ambient

Repeatability

± 0.5° C

Version 106 11

1.5.4. Temperature

§

Figures are based on actual tests in an empty oven. Uniformity can vary slightly depending on unit and

operating conditions.

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SAFETY LAC Series Oven Owner’s Manual



Carefully follow the established Lock Out Tag Out policies of your company in all cases.

Danger!

Electrical panels contain high voltage. Disconnect and lock out the power supply before working inside any electrical panels. Failure to lock out the power supply can result in death or injury.

12 Version 106

2. Safety

2.1. Safety Information

Do not work on the LAC-6 Series Oven without reading and understanding this section which contains important information and warnings. Ignoring these warnings can result in death, serious injury or damage to the machine and product.

2.1.1. Lockout

Machine lockout places the LAC-6 Series Oven into a zero energy state and prevents accidental machine start up. Always follow the Lockout Procedure described in this Section before cleaning, maintaining or repairing the LAC-6 Series Oven. An accidental start-up, while working on the LAC-6 Series Oven, can result in serious injury or death.

2.1.1.1. Lockout Requirements

1. Every power source that can energize any element of the LAC-6 Series Oven must be

shut off at the closest possible power source. This includes air, water and electricity, including the Disconnect Switch.

2. After energy sources are locked out, test to ensure circuits are de-energized.

2.1.1.2. Lockout Procedure

Personnel authorized to lockout equipment must have the necessary locks to perform the lockout.

1. Physically disconnect all electrical power to the machine or lockout the appropriate

breaker or disconnects.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual SAFETY

Danger!

Electrical panels contain high voltage. Disconnect and lock out the power supply before working inside any electrical panels. Failure to lock out the power supply can result in death or injury.

Warning!

Do not place this oven in an environment harmful to electrical components.

Placing this oven in an environment detrimental to electrical components (for example, environments where carbon fibers, coal dust or similar contaminants may be present) may result in component failure.

Contact Despatch for options available to help prevent such failures.

Version 10 13

2. Close all valves and bleed off any pressure.

3. Test for power by attempting a start with the machine controls.

4. Identify the Lockout Condition with a tag on the electrical disconnect and pneumatic

shut off valve.

5. When work is complete, remove all tags and restore the machine to its working state.

2.1.2. Door and Panel

The control panel on the LAC-6 Series Oven protect against hazards. Operation without the control panel in place creates hazards that the control panel is intended to render safe for personnel.

2.2. Maintenance

Only qualified and trained personnel should perform maintenance or repair.

2.3. Electrical Power

Only qualified and trained personnel should perform electrical maintenance or electrical repair.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

SAFETY LAC Series Oven Owner’s Manual

Danger!

Contact with energized electrical sources may result in serious injury or death.

Danger!

Always disconnect all power before extinguishing a fire. Attempting to extinguish a fire in a machine connected to electrical power can result in serious injury or death!

Warning!

Do not place this oven in an environment harmful to electrical components.

Placing this oven in an environment detrimental to electrical components (for example, environments where carbon fibers, coal dust or similar contaminants may be present) may result in component failure.

Contact Despatch for options available to help prevent such failures.

14 Version 106

Before performing maintenance, disconnect all electrical power from the machine.

Use a padlock and lockout all disconnects feeding power to the machine.

Never clean, or repair the oven when in operation. Unauthorized alterations or modifications to LAC-6 Series Oven are strictly

forbidden. Never modify any electrical circuits. Unauthorized modifications can impair the function and safety of the LAC-6 Series Oven.

2.4. Fire

Keep the LAC-6 Series Oven clean and free of scrap materials, oil or solvents to prevent the possibility of fire. In the event of fire, use a fire extinguisher as follows.

1. Leave door as it is.

2. De-energize the machine immediately by turning OFF the main power.

3. Shut off fuel (if applicable)

4. Call the fire department or extinguish the fire.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual SAFETY Version 10 15

2.5. Equipment Lockout Requirements

To prevent injury or equipment damage during inspection or repair, the LAC-6 Series Oven must be locked out.

2.5.1. Emergency Stop

When a risk of personal injury or damage to the LAC-6 Series Oven exists, turn OFF the oven by removing/unplugging the cord. This shuts off all electrical power to the oven.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

THEORY OF OPERATION LAC Series Oven Owner’s Manual

Damper

Control

Power Switch

Protocol Plus Controller

Figure 1. LAC High-performance Bench-top Oven.

Figure 2. Horizontal Airflow through the LAC Oven.

16 Version 106

3. Theory of Operation

3.1. The LAC-6 Series Oven

The LAC-6 high-performance bench-top oven uses digitally-controlled, horizontal recirculating airflow to ensure uniform temperatures throughout the oven for fastprocessing (Figure 1). A high-volume fan circulates air through perforated, stainless steel walls to create a constant horizontal airflow across all sections of the oven (Figure 2). The result is proven reliability in demanding production and laboratory applications such as curing, drying, sterilizing, aging and other process-critical procedures.

The LAC-6 oven is especially useful for testing, preheating, sterilizing, drying, aging and curing along with other production applications. The overall result is efficient productivity under strenuous conditions. The chamber can be densely loaded without interfering with the process. Air delivery temperature is within 1 °C of the number appearing on the digital display. Fresh air intake is regulated by a panel-mounted damper control, while the exhaust opening is fixed. The exhaust port, on the back of the oven, is covered by a hat bracket.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual THEORY OF OPERATION

Warning!

Do not remove the hat bracket (located in rear of oven) as it distributes exhaust air and protects the exhaust opening from being completely covered.

Figure 3. Damper Positions.

Version 106 17

3.2. Damper Control

The LAC-6 oven is equipped with a manually-adjustable damper mechanism. The damper control arm is located on the front panel of the oven (Figure 1). The damper adjustment controls the fresh air opening which, due to pressurization of the oven chamber, controls the flow of exhaust. If the damper is in the full open position, the maximum exhaust rate is achieved. If the damper is in the fully closed position, the minimum exhaust rate is achieved.

3.2.1. Determining Damper Settings

The optimum setting for the damper depends on a variety of factors. These factors include ambient environment temperature, load conditions, load distribution, heat-up and cool-down rates, desired temperature uniformity and most importantly the desired operating temperature. Additionally, engineering tradeoffs for each factor must be carefully weighed. While considering each factor independently may be too daunting, guidelines provide a simpler way to determine damper settings.

In general, set the damper so the amount of fresh air flowing into and exhausting from the chamber agrees with the desired operating temperature conditions. The following outline provides practical considerations for various damper position settings (Figure 3).

3.2.1.1. Damper Full-Closed Position

The damper in full-closed position allows maximum attainable heat-up rates for the chamber. In addition, the chamber uses minimum power to operate at the desired temperature. In most cases, maintain the damper in the full-closed position to efficiently operate at the maximum operating temperature for the chamber.

3.2.1.2. Damper Full-Open Position

The damper in full-open position allows minimum operating temperature for the chamber. Friction heat from the air recirculation system builds up in the chamber. This causes chamber temperature to rise slightly though the heating system is not ON. After

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

THEORY OF OPERATION LAC Series Oven Owner’s Manual



When the damper is in the full-open position, the oven may not be able to heat to the maximum oven operating temperature.



Over-pressuring the chamber can cause hot air to blow out around the door seal and cause the area around the door to be hot to the touch. Eliminate this hot air from entering the room by closing the damper slightly until the air stops blowing.

18 Version 106

the recirculation motor has been ON for an extended period of time, the chamber reaches a thermal equilibrium temperature.

When the damper is not set to full-open position, the chamber has no way to readily dissipate the heat generated by the friction. With the damper fully open, the thermal equilibrium temperature is the minimum operating temperature of the chamber.

3.2.1.3. Other Damper Settings

The damper can be set to several other distinct operating positions. In most cases the damper setting is influenced by two specific performance factors: uniformity and cooldown rates.

Chamber Uniformity

The system’s inside chamber pressure influences chamber uniformity. Pressure inside the chamber depends on the amount of fresh air flowing into the chamber. When a large volume of fresh air flows into the chamber, the chamber pressurizes slightly and overall temperature uniformity improves. The slightly pressurized chamber produces the effect of "pushing" air to the corners of the chamber. Typically the corners of the chamber improve with respect to temperature distribution while the core of the chamber maintains excellent uniformity characteristics regardless of damper position.

Pressurization of the chamber typically is a factor when the chamber is loaded heavily. The best uniformity results, with respect to the product, are achieved when no more than two-thirds of any inside chamber dimension are used. The best overall results are achieved when the product(s) are located in the center of the chamber.

Cool-Down Rates

The more open the damper, the faster the cool-down.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual THEORY OF OPERATION

Figure 4. Protocol Plus Displays and Control Buttons.

Version 106 19

3.3. The Protocol Plus Controller

The Protocol Plus controller has two displays. A dedicated LED upper display shows the oven temperature (Figure 4). A two line LCD lower display provides information on control status, high limit temperature and allows changes to be made to the control settings. Review the Protocol Plus Controller Owner’s Manual for more information.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ASSEMBLY & SETUP LAC Series Oven Owner’s Manual

20 Version 106

4. Assembly & Setup

Assembly and Setup provides directions for unpacking and installing your LAC-6 Series Oven.

4.1. Unpack & Inspect the LAC-6 Series Oven

Remove all packing materials and thoroughly inspect the oven for any damage that might have occurred during shipment.

Note whether the carton and plastic cover sheet inside carton are still in good

condition

Observe all outside surfaces and corners of the oven for scratches and dents Check oven controls and indicators for normal movement, bent shafts, cracks, chips

or missing parts such as knobs and lenses

Check the door and latch for smooth operation

4.1.1. If Damaged During Shipping

If damage occurred during shipping:

1. Contact the shipper immediately and file a written damage claim.

2. Contact Despatch Industries (1-800-473-7373 or 1-952-469-8230 or

service@despatch.com) to report your findings and to order replacement parts for those damaged or missing. Send a copy of your filed damage claims to Despatch industries (Despatch Industries, 8860 207th Street, Lakeville, MN 555044, USA).

3. Check the packing list to ensure you received all the specified components of the

oven system. If any items are missing, contact Despatch Industries to have missing products forwarded to you. Your shipment should include:

One (1) Despatch oven One (1) Instruction manual and Protocol Plus Manual One (1) Warranty card Two (2) Shelves

4. Complete the warranty card and mail it to Despatch within 15 days after receipt of the

equipment.

4.2. Set-up the LAC-6 Series Oven

4.2.1. Select Oven Location/Operating Environment

The Despatch LAC-6 Series oven is designed to operate in an industrial setting. Despatch recommends the following environmental operating guidelines:

1. Place the oven on a flat, level solid foundation

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ASSEMBLY & SETUP

Warning!

All grounding and safety equipment must be in compliance with applicable codes, ordinances and accepted safe practices.

Warning!

Do not use the oven in wet, corrosive or explosive atmospheres unless this oven is specifically designed for a special atmosphere.

Version 106 21

2. Do not expose the oven to excessive external vibration

3. Do not remove electrical cabinet covers

4. Where excessive particulate matter is present, such as on a construction site or coal

processing, Despatch recommends periodic (usually monthly) cleaning of all electrical compartments.

5. Ensure the power supply meets Despatch specifications. If the facility power supply

is not stable, Despatch recommends a line conditioner.

4.2.2. Set-up Procedure

1. Place oven on bench top or optional cabinet base. a. Ensure a minimum of two (2) inches (5.1 cm) clearance in the rear of oven to

provide proper ventilation. The oven may be placed next to another cabinet, or next to another oven, with three (3) inch (7.6 cm) clearance (the doors will still open).

b. Ensure oven is level and plumb for proper heat distribution and operation of all

mechanical components.

2. Identify correct power source indicated on the specification nameplate.

3. Plug or hardwire oven directly to the electric supply.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ASSEMBLY & SETUP LAC Series Oven Owner’s Manual



Read the Model LAC-6 name plate (top of oven or top of control area under the door) for proper power requirements before proceeding with wiring and power connections (Figure 5).

Danger!

All grounding and safety equipment must be in compliance with applicable codes, ordinances and accepted safe practices.

Figure 5. LAC-6 Series Oven Nameplate.

22 Version 106

4.2.3. Wiring & Power Connections

Models LAC 1-10, 1-38A, 1-38B, and 1-67 come equipped with an appropriate plug and cord. Models LAC 2-12 and 2-18 must be hardwired to the electric supply using 10 AWG or larger wires suitable for at least 75 °C (167 °F).

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ASSEMBLY & SETUP

Power cord fitting or conduit

Access plate to assist in tightening conduit fitting



For units that must be hardwired or where a power cord is shipped loose, run the power lines from the rear of the oven to the front control panel.

Figure 6. Rear Access Panel for Hard-Wired Connections. Figure 7. Hinged Panel for Simpler Access to Power Connections.

Version 106 23

4.2.3.1. Wire LAC-6 Models 2-12 and 2-18

1. Open the knock-out near the rear-access panel (Figure 6).

2. Turn hinged front panel latches ¼ turn for easy access to access power connection (Figure 7).

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

ASSEMBLY & SETUP LAC Series Oven Owner’s Manual

Connect power at main circuit board terminals L1 and L2.

Figure 8. Power Connections at Main Circuit Board.

24 Version 106

3. Connect power at main circuit board (access by opening hinged control panel), terminals L1 and L2 (Figure 8). a. Tighten terminals on the circuit board to 10.6 to 13.2 lb-in (1.2 to 1.5 nM) b. Attach the ground wire to the ground buss on the panel. c. Close hinged control panel after attaching the power supply wires or cord.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual ASSEMBLY & SETUP



Refer to instructions provided recorder manufacturer for more specific installation notes.

Parameter Code

Degrees C

Degrees F

Inps

18

Icor 0 0

diSP

On

dPOS

0 0 EUU**

400

752

EUL**

0

32

ChUP

400

800*

ChLO

0 0 DFF

1

Version 106 25

4.3. MRC5000 Setup (Optional)

Temperature is retransmitted to the MRC5000 recorder from the controller. Set up the recorder by:

1. Ensure hardware jumper JU1 is in place for the 5 VDC setting (Refer to MRC5000 Manual included).

2. Move Mode to PROG/TEST/CAL to display Prog.

3. Press ▼ twice to display Inps. Move to each Parameter Code using ▼or ▲. Adjust each Parameter Code using the settings in Table 2.

4. After adjusting all settings, move Mode to RUN. Display on both the Recorder and controller should read the same.

Table 1. MRC 5000 Settings.

* Change 0-400 chart paper to 0-800 chart paper. Depending on the equipment used, 0-

600 paper may be used if the maximum temperature is 500 degrees F.

** These values must match the settings RetOutLo and RetOutHi on the Protocol Plus

Control page. For example, if RetOutLo is 32, EUL must read 32.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

OPERATION LAC Series Oven Owner’s Manual



Users and operators of this oven must comply with operating procedures and training of operating personnel as required by the Occupational Safety and Health Act (OSHA) of 1970, Section 5 and relevant safety standards, and other safety rules and regulations of state and local governments. Refer to the relevant safety standards in OSHA and National Fire Protection Association (NFPA), Section 86 of 1990.



Despatch Industries cannot be responsible for either the process or process temperature used, or for the quality of the product being processed. It is the responsibility of the purchaser and operator to see that the product undergoing processing in a Despatch oven is adequately protected from damage.

Carefully following the instructions in this manual will help the purchaser and operator in fulfilling that responsibility.

Caution!

Always place loads on the shelves provided to avoid possible uneven heating and damage to the oven.

Warning!

Do not use the oven in wet, corrosive or explosive atmospheres unless this oven is specifically designed for a special atmosphere.

26 Version 106

5. Operation

5.1. Load Oven

Avoid spilling on the heater elements or oven floor when loading the oven. Do not place the load on the oven floor plate. Placing the load on the oven floor may cause the load to heat unevenly and the weight may cause shorting out of the heater elements. Use the shelves provided.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual OPERATION

Warning!

Do not use flammable solvent or other flammable material in this oven. Do not process closed containers of any substance or liquid in this oven because they may explode under heat.

Version 106 27

The two shelves are designed to be pulled out about halfway without tipping. Do not overload the shelves (Refer to Support Capacity listed in Section 1.5.2). Distribute the workload evenly so airflow is not restricted. Do not overfill your oven. The workload should not take up more than two-thirds of any dimension of the inside cavity.

5.2. Pre-Startup Checklist

□ Know the system. Read this manual carefully. Make use of its instructions and

explanations. Safe, continuous, satisfactory, trouble-free operation depends primarily on your degree of understanding the system and your willingness to keep all parts in proper operating condition.

□ Check line voltage. Voltage must correspond to nameplate requirements of motors

and controls. A wrong voltage can result in serious damage. Refer to Section 1.5.4 for more information.

□ Check fresh air and exhaust openings. Do not be careless about restrictions in and

around the fresh air and exhaust openings and stacks. Under no condition can they be permitted to become so filled with dirt that they reduce airflow.

□ Ventilation. An exhaust opening in the rear of the unit is covered by a hat bracket. Do

not remove the hat bracket as it protects the exhaust opening from being completely covered.

□ Helpful hints:

o For drying ovens, open vent to prevent buildup of moisture. o For sample heating, close vent when no ventilation is required.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

OPERATION LAC Series Oven Owner’s Manual



For fastest oven heat-up time, close the fresh-air vent. After the desired temperature is reached, the vent may be adjusted as needed.

28 Version 106

5.3. Operating Procedure

5.3.1. Start Oven

1. Start fan a. Open oven door b. Press Power Switch to ON (Figure 1). Listen for the recirculating fan to start. c. Shut oven door d. Check that control display turns ON.

2. Operate temperature control as desired by following the control operation instructions to follow.

5.3.2. Working with Protocol Plus Operating Modes

Refer to the Protocol Plus Controller Owner’s Manual for specifics on working with the controller.

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LAC Series Oven Owner’s Manual MAINTENANCE

Warning!

Do not attempt any service on this oven before opening the main power disconnect switch.

Warning!

Do not place this oven in an environment harmful to electrical components.

Placing this oven in an environment detrimental to electrical components (for example, environments where carbon fibers, coal dust or similar contaminants may be present) may result in component failure.

Contact Despatch for options available to help prevent such failures.

Version 106 29

6. Maintenance

6.1. Checklist

Keep equipment clean. Gradual dirt accumulation retards airflow. A dirty oven can

result in unsatisfactory operation such as unbalanced temperature in the work chamber, reduced heating capacity, reduced production, overheated components, and the like. Keep the walls, floor and ceiling of the oven work chamber free of dirt and dust. Floating dust or accumulated dirt may produce unsatisfactory work results. Keep all equipment accessible. Do not permit other materials to be stored or piled against it.

Protect controls against excessive heat—particularly controls, motors or other

equipment containing electronic components. Temperatures greater than 51.5°C (125°F) should be avoided.

Establish maintenance and checkup schedules. Do this promptly and follow the

schedules faithfully. Careful operation and maintenance will be more than paid for in continuous, safe and economical operation.

Maintain equipment in good repair. Make repairs immediately. Delays may be

costly in added expense for labor and materials and in prolonged shut down.

Practice safety. Make it a prime policy to know what you are doing before you do it.

Make caution, patience, and good judgment the safety watchwords for the operation of your oven.

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MAINTENANCE LAC Series Oven Owner’s Manual 30 Version 106

6.2. Lubrication

Fan motor bearings are permanently lubricated. All door latches, hinges, door operating mechanisms, bearing or wear surfaces should be lubricated to ensure easy operation.

6.3. Routine Tests

Test LAC-6 Series Oven functions regularly and carefully for best performance. Safety of personnel and maintenance of your equipment may depend on the proper operation of any of the temperature control functions.

Check that the heater LED is cycling on and off, indicating the heater is working. Check the high limit function to make sure it is working properly:

1. Press Select and go to Manual Mode. Enter a control setpoint value at least 20°F

(11°C) lower than the current process temperature.

2. Press Menu and lower the high limit setpoint to a value just below the current

process temperature.

3. Press Run

4. The high limit alarm indicator will flash and a high limit alarm message will

display.

5. Press Stop.

6. Press Reset.

7. Return the control setpoint and high limit setpoint values to their original values.

6.4. Door Adjustment

To increase or decrease latch tension, or to gain a better door seal on the latch side:

Turn the door strike in or out on its threads by loosening the allen head set screw. If necessary, adjust the vertical alignment of the strike to increase or decrease latch

tension.

1. Loosen the two screws on the latch strike and sliding the strike up or down on its

slots

2. After positioning the strike, tighten the screws.

6.5. Replacement Parts

To order or return parts, contact Despatch Service & Technical Support. When returning parts, a Despatch representative will provide an MRA (Material Return Authorization) number. Attach the MRA number to the returned part for identification. When ordering parts, expedite the process by giving the model number, serial number and part number.

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LAC Series Oven Owner’s Manual MAINTENANCE

Global Headquarters

Contact

Service & Technical Support

Despatch Industries

8860 207th Street Lakeville, MN 55044 USA

International/Main: 1-952-469-5424 US toll free: 1-888-337-7282 Fax: 1-952-469-4513 info@despatch.com www.despatch.com

Service: 1-952-469-8230 US toll free: 1-800-473-7373 Fax: 1- 952-469-8193 Service @despatch.com

Warning!

Disconnect the main power switch or power cord before attempting any repair or adjustment.

Figure 9. Remove Screws to Remove Floor Plate.

Figure 10. Heater Panel and Inlet Cone.

Version 106 31

6.5.1. Replace the Protocol Plus Controller

Refer to the Protocol Plus Owner’s Manual for instructions on replacing the

Protocol Plus Controller.

6.5.2. Replace Heater Unit

Tools needed: 3/8" wrench, T20 Torx bit driver

1. Remove the floor plate.

a. Remove the

screws from the floor plate (Figure 9).

b. Lift the floor plate out of the

oven to expose heater panel/inlet cone (Figure 10).

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MAINTENANCE LAC Series Oven Owner’s Manual



Before disconnecting leads, carefully diagram (or note) which wires connect to which terminals.

Figure 11. Remove Screws to Remove Side Panels.

Figure 12. Remove Heater Panel by Removing

Screw in Front Edge of Each Panel.

32 Version 106

2. Remove side walls by removing the screws on the

front edge of each panel (Figure 11).

3. Disconnect the heater leads from heater element with

wrench.

4. Unscrew the screws holding the heater frame to the

oven body (Figure 12).

5. Remove heater and discard.

6. Screw down the new heater frame.

7. Attach the heater leads to appropriate

terminals.

8. Replace and screw in interior floor and side

panels.

6.5.3. Replace Fan Motor

Tools needed: T20 Torx bit driver, 5/32 inch Allen wrench, one quarter (¼) inch socket set

1. Remove the floor plate.

a. Remove the screws from the floor plate (Figure 9). b. Lift the floor plate out of the oven to expose heater panel/inlet cone

(Figure 10).

c. Lift the floor plate out of the oven to expose heater panel/inlet cone

(Figure 10).

2. Remove side walls by removing the screws on the front edge of each panel

(Figure 11).

3. Disconnect the heater leads from heater element with wrench.

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LAC Series Oven Owner’s Manual MAINTENANCE



Before disconnecting leads, carefully diagram (or note) which wires connect to which terminals.

Version 106 33

4. Unscrew the screws holding the heater frame to the oven body (Figure 12).

5. Unplug the motor harness from the circuit board and remove motor and heater

ground wires from ground stud.

6. Unplug heater leads from circuit board and thermocouple leads from control.

7. Pull off fresh air damper handle from damper arm.

8. Remove screws holding fresh air damper arm assembly to control panel.

9. Remove the chamber floor plate.

a. Remove the screws from the floor plate. b. Lift the floor plate out of the oven.

10. Remove the left side wall.

11. Remove fan and heater plug assembly from oven by lifting on the air outlet of the

assembly and pushing from underneath.

12. Remove heater (do not disconnect wires).

13. Remove the fan inlet plate.

14. Loosen the set screws (2) on fan wheel and remove wheel.

15. Remove the screws (4) holding the fan motor in place.

16. Remove the fan motor.

17. Install the fan motor.

a. Insert shaft seal onto shaft. b. Insert the shaft into shaft collar. c. Fasten motor to plug assembly with the four screws.

18. Install fan wheel onto motor shaft.

19. Replace and fasten the fan inlet cover.

20. Adjust the fan wheel for 3/16 inch clearance between the wheel and the inlet ring

and tighten the set screws on the fan wheel. Check that the set screws hit the flats machined into the motor shaft.

21. Replace and fasten heater.

22. Replace fan and heater plug assembly in oven body.

23. Replace left side wall.

24. Replace and fasten floor plate.

25. Replace fresh air damper arm assembly.

26. Replace fresh air damper handle.

27. Connect heater leads to circuit board.

28. Connect motor wire harness and fasten motor and heater ground wires to ground

stud.

29. Connect thermocouple wires to control.

30. Replace control panel in oven body.

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TROUBLESHOOTING LAC Series Oven Owner’s Manual

Alarm Status

Possible Problem

Next Step

Hi-Limit LED flashing

Problem with thermocouple Hi-limit setpoint has been

exceeded.

Once the problem has corrected, press Reset.

Soak LED flashing

Oven temperature has not entered (or dropped out of) the soak band and the soak timer has stopped

Program a slower ramp rate or if oven is not heating check heater circuit.

Top LED displays OPEN and lower LCD displays CONTROL SENS ERR

Control thermocouple is disconnected or broken

Repair or replace the thermocouple. Lower LCD displays HI

LIM SENS ERR

Hi limit thermocouple is disconnected or broken

Repair or replace the thermocouple.

Lower LCD displays HIGH LIMIT ALARM

Hi limit temperature setpoint has been exceeded

Determine if:

the setting is too close to the

setpoint the SSR is defective calibration is incorrect



The lower LCD intermittently display HL Temp. This is not an error message, but the Hi limit thermocouple temperature reading.



The circuit board mounted on the control panel has three status LED indicators to help troubleshoot if the oven is not heating:

 If LED 1 is not lit, check 2F and 3F (control fuses), or power

switch.

 If LED 1 and LED 3 are lit but not LED 2, check high limit

(and optional door switch, if installed).

 If all three LEDs are lit, check 1F and 4F (heater fuses), SSR,

heater, and heater relays.

34 Version 106

7. Troubleshooting

7.1. Troubleshooting Error Messages and Alarms

Table 3 lists the more common error messages, the possible problems and remedies.

Table 2. Error Messages and Next Steps.

7.2. Troubleshooting Symptoms

Table 4 lists symptoms, probably causes and suggested remedies.

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LAC Series Oven Owner’s Manual TROUBLESHOOTING

Symptom

Possible Cause

Next Step

Failure to heat

or heats to only 35-50

degrees C

No power

Check power source and/or oven and wall fuses

Broken or frayed cord

Replace with new cord

Burned out heater

Replace heater (see Warranty Section 8.1)

Protocol™ malfunction

Replace controller

Loose wire connections

Disconnect power and check connections behind control panel

Heater relay failure

Replace circuit board

Door switch failure

Replace door switch

Slow heat-up

Improperly loaded

Reduce load or redistribute load in chamber

Low line voltage

Supply sufficient power and proper connections. Check for circuit overload

Heating element(s) are burned out

Replace burned out element (see Warranty Section 8.1)

240 volt oven is connected to a 208V line

Raise line voltage to a 240 volt line or modify oven for 208V operation (consult factory)

Fan motor failure

Replace fan motor

Frequent

heater

element out

Harmful fumes generated by load

Increase vent opening or discontinue process

Spillage or splattering of material on heater elements

Disconnect power and clean oven chamber and elements Overheating oven

Check the Hi-limit

Erratic or

inaccurate

temperature

Protocol™ Plus Controller malfunction

Replace Protocol™ Plus Controller

Improper tuning parameters

Check tuning parameters

Protocol™ Plus Controller miscalibration

Recalibrate Protocol™ Plus Controller (See Protocol Plus Owner’s Manual, sections on Calibration)

Hi-limit setting

Hi-limit should be 10-25°C higher than setpoint

Improper offset

Check zone calibration

Excess

surface or

door

temperature

Door seal deterioration

Replace door seal

Improper

airflow

Fan motor failure

Replace fan motor

Fan wheel seated too low on fan shaft

Adjust fan wheel for 3/16" clearance between wheel and inlet ring

Unbalanced fan wheel

Replace fan wheel

Excessive

vibration

Dirty fan wheel

Clean fan

Unbalanced fan wheel

Replace fan wheel

Oven will not

control at

setpoint

Hi-limit set too low

Set the Hi-limit higher

Protocol malfunction

Replace control

SSR malfunction

Replace SSR and/or check control output voltage

Air friction of recirculation fan

Open exhaust air vent. Unit will not control below minimum operating temperature with vent closed

Heater does

not shut down

until temp.

reaches the

Hi-limit setting

Protocol malfunction

Replace Protocol

SSR malfunction

Replace SSR

Version 106 35

Table 3. Troubleshooting Oven Symptoms.

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APPENDICES LAC Series Oven Owner’s Manual

36 Version 106

8. Appendices

8.1. Standard Products Warranty

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LAC Series Oven Owner’s Manual APPENDICES Version 106 37

8.2. Electrical Schematics

The following pages contain electrical schematics and data for the LAC1-10-6, LAC138A-6, LAC1-38B-6, LAC1-67-6, LAC2-12-6 and LAC2-18-6 ovens.

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

APPENDICES LAC Series Oven Owner’s Manual

Figure 13. LAC1-10-6 (Excerpt from drawing 146271D01).

38 Version 106

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual APPENDICES

Figure 14. LAC1-38A-6 (Excerpt from drawing 146273D01).

Version 106 39

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

APPENDICES LAC Series Oven Owner’s Manual

Figure 15. LAC1-38B-6 (Excerpt from drawing 146275D01).

40 Version 106

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual APPENDICES

Figure 16. LAC1-67-6 (Excerpt from drawing 146277D01).

Version 106 41

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

APPENDICES LAC Series Oven Owner’s Manual

Figure 17. LAC2-12-6 (Excerpt from drawing 146279D01).

42 Version 106

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual APPENDICES

Figure 18. LAC2-18-6 (Excerpt from drawing 146281E01).

Version 106 43

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LAC Series Oven Owner’s Manual

Despatch

INDUSTRIES

44 Version 106

3rdDraft—

GLOBAL HEADQUARTERS

Despatch Industries 8860 207th Street West Minneapolis, MN 55044 USA

US toll free: 1-888-337-7282 international/main: 1-952-469-5424 fax: 1-952-469-4513

info@despatch.com www.despatch.com

SERVICE AND TECHNICAL SUPPORT

service parts: 1-800-473-7373 international service/main: 1-952-469-8230 service fax: 1-952-469-8193

service@despatch.com

All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

Despatch LAC2-12-6 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual