Despatch LBB Series Owner's Manual

LBB Series Oven Owner’s Manual ABOUT THIS MANUAL

ULTRAFLEX DRYING AND FIRING FURNACE

MODELS 1000, 3615, 3630, 3640

C-204 VERSION 12

10/2008

LBB SERIES OVEN

OWNER’S MANUAL

C-188 PN 146230 VERSION 13 9/2011

Version 13 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 LBB Series Oven Owner’s Manual

Revision

Date

Author

Description

C

Updated electrical drawings in DRAWINGS AND SPARE PARTS LISTS section.

D

Corrections.

E

Correction, page 19, set-up parameter table

F

Parts lists corrections in DRAWINGS AND SPARE PARTS LISTS section

G

Corrections to SPECIFICATIONS section, addition of options and features in APPENDIX

H

Change Product Warranty page

I

Update drawings and hi-limit information

J

Parts lists corrections in DRAWING AND SPARE PARTS LISTS section. Corrected Despatch address.

K

Parts lists corrections in DRAWING AND SPARE PARTS LISTS section

L

Updated warranty

12

3/2011

K. Livingston

Revise format

13

9/2011

K. Livingston

Additional Parts tables

2 Version 13

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.

LBB Series Oven Owner’s Manual ABOUT THIS MANUAL Version 13 3

Table of Contents

1. About This Manual ................................................................................................. 8

1.1. Important User Information .......................................................................... 8

1.2. Manufacturer & Service ................................................................................ 9

1.3. Organization of this Manual ......................................................................... 9

1.4. Conventions ................................................................................................ 10

1.5. Specifications .............................................................................................. 11

1.5.1. Dimensions .............................................................................................. 11

1.5.2. Capacities ................................................................................................ 12

1.5.3. Power ....................................................................................................... 13

1.5.4. Temperature ............................................................................................ 14

2. Safety .................................................................................................................... 15

2.1. Safety Information ...................................................................................... 15

2.1.1. Lockout.................................................................................................... 15

2.1.1.1. Lockout Requirements ......................................................................... 15

2.1.1.2. Lockout Procedure ............................................................................... 15

2.2. Maintenance ................................................................................................ 16

2.3. Electrical Power .......................................................................................... 16

2.4. Fire .............................................................................................................. 17

2.5. Equipment Lockout Requirements ............................................................. 17

2.5.1. Emergency Stop ...................................................................................... 17

3. Theory of Operation .............................................................................................. 19

3.1. The LBB Series Oven ................................................................................. 19

3.1.1. Oven Theory ............................................................................................ 20

3.2. Control Systems .......................................................................................... 20

3.2.1. Primary Control Instrument .................................................................... 20

3.2.2. Optional Protocol Plus Controller ........................................................... 22

3.2.3. Hi-Limit Instrument ................................................................................ 22

3.2.3.1. Product Hi-Limit Instrument ............................................................... 23

3.2.3.2. Oven Hi-Limit Instrument ................................................................... 23

4. Assembly & Setup ................................................................................................ 24

4.1. Unpack & Inspect the LBB Series Oven .................................................... 24

4.1.1. If Damaged During Shipping .................................................................. 24

4.2. Set-up the LBB Series Oven ....................................................................... 24

4.2.1. Select Oven Location/Operating Environment ....................................... 24

4.2.2. Set-up Procedure ..................................................................................... 25

4.2.3. Wiring & Power Connections ................................................................. 26

5. Operation............................................................................................................... 28

5.1. Load Oven ................................................................................................... 28

5.2. Pre-Startup Checklist .................................................................................. 29

5.3. Operating Procedure ................................................................................... 30

5.3.1. Start Oven ................................................................................................ 30

5.4. Working with the Control Instrument ......................................................... 32

5.4.1. Change Setpoint ...................................................................................... 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.

ABOUT THIS MANUAL LBB Series Oven Owner’s Manual 4 Version 13

5.4.2. Control Instrument Parameter Programming Mode ................................ 33

5.4.2.1. Entering Control Instrument Operating and Set-up Mode .................. 33

5.4.2.2. Control Instrument Operating Mode Notes ......................................... 34

5.4.3. Change Control Instrument Display from Centigrade to Fahrenheit ...... 35

5.4.4. Oven Zone Calibration ............................................................................ 36

5.4.5. Set the Hi-Limit ....................................................................................... 37

5.4.5.1. Change the Hi-Limit Instrument Setpoint ........................................... 37

5.4.6. Hi-Limit Instrument Parameter Setup Mode ........................................... 38

5.4.7. Hi-Limit Instrument Setup Parameters ................................................... 38

5.4.8. Change Hi-Limit instrument Display from Centigrade to Fahrenheit ... 39

5.5. Working with Optional Protocol Plus Controller Operating Modes .......... 40

6. Maintenance .......................................................................................................... 41

6.1. Checklist ..................................................................................................... 41

6.2. Lubrication .................................................................................................. 42

6.3. Routine Tests .............................................................................................. 42

6.3.1. Test Control Instrument .......................................................................... 42

6.3.2. Test Hi-Limit Instrument ........................................................................ 42

6.4. Replacement Parts ....................................................................................... 42

6.4.1. Replace the Control Instrument............................................................... 43

6.4.2. Replace Hi-Limit Instrument .................................................................. 46

6.4.3. Replace (Optional) Protocol Plus Controller .......................................... 49

6.4.4. Replace Heater Unit ................................................................................ 49

6.4.5. Replace Fan Motor .................................................................................. 51

7. Troubleshooting .................................................................................................... 53

8. Appendices ............................................................................................................ 55

8.1. Standard Products Warranty ....................................................................... 55

8.2. Optional Equipment .................................................................................... 56

8.2.1. Assemble Oven Stand ............................................................................. 56

8.2.2. Timer Option ........................................................................................... 57

8.2.2.1. Operating the Timer ............................................................................. 57

8.2.2.2. Configure the Timer ............................................................................ 58

8.2.3. Timer Option with Audible and Visual Alarm........................................ 58

8.2.4. High Alarm Limit Option ........................................................................ 59

8.2.5. Recorder Option ...................................................................................... 59

8.2.6. Stacking Kit Assembly Instructions (Only for models LBB1-23, LBB1-

43 and LBB1-69 ) ................................................................................................. 59

8.3. Part Lists ..................................................................................................... 61

8.3.1. LBB1-23A-1............................................................................................ 61

8.3.2. LBB1-23B-1 ............................................................................................ 61

8.3.3. LBB1-43A-1............................................................................................ 62

8.3.4. LBB1-43B-1 ............................................................................................ 62

8.3.5. LBB1-69A-1............................................................................................ 63

8.3.6. LBB1-69B-1 ............................................................................................ 63

8.3.7. LBB2-12-1 .............................................................................................. 64

8.3.8. LBB2-18-1 .............................................................................................. 64

8.3.9. LBB2-27-1 .............................................................................................. 65

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.

LBB Series Oven Owner’s Manual ABOUT THIS MANUAL Version 13 5

8.4. Electrical Schematics .................................................................................. 66

Figures

Figure 1. LBB Forced Convection Benchtop Oven. ......................................................... 19

Figure 2. Horizontal Airflow through the LBB Oven. ...................................................... 19

Figure 3. LBB Series Oven Primary Control Instrument ................................................. 21

Figure 4. Protocol Plus Displays and Control Buttons. .................................................... 22

Figure 5. Hi-Limit Instrument........................................................................................... 23

Figure 6. LBB Series Oven Name Plate. .......................................................................... 26

Figure 7. LBB Series Oven with Top Removed. .............................................................. 27

Figure 8. Wiring Access through Rear of Oven. .............................................................. 27

Figure 9. Close-up of Connector Block. ........................................................................... 27

Figure 10. LBB Series Oven Control Panel. ..................................................................... 31

Figure 11. Adjust Damper to Set Exhaust Vent by rotating the outer component. .......... 31

Figure 12. Remove Control Panel to Access Control Instrument. .................................... 44

Figure 13. Providing easy access to the Control instrument. ............................................ 44

Figure 14. Remove Old Control and Hi-Limit Instruments and Wiring (Rear view). ...... 45

Figure 15. Prepare to remove control instrument by removing the mounting bracket. .... 45

Figure 16. Connections to Control Instrument. ................................................................ 46

Figure 17. Hi-Limit Connector Block on Control Board. ................................................. 47

Figure 18. Press and Hold Tabs to Remove Hi-Limit Instrument. ................................... 47

Figure 19. Connections to Hi-Limit Instrument. .............................................................. 48

Figure 20. Connections to Hi-Limit Instrument. .............................................................. 48

Figure 21. Remove Screws to Remove Each Duct. .......................................................... 49

Figure 22. Typical Heating Element. ................................................................................ 51

Figure 23. Fan Motor Location and Close-up. .................................................................. 52

Figure 24. Optional LBB Oven Stand............................................................................... 56

Figure 25. Timer Option Displays and Switches. ............................................................. 57

Figure 26. Stacking Kit Assembly Components. .............................................................. 60

Figure 27. LBB1-23A-1 Schematic. ................................................................................. 67

Figure 28. LBB1-23B-1 Schematic. ................................................................................. 67

Figure 29. LBB1-43A-1 Schematic. ................................................................................. 67

Figure 30. LBB1-43B-1 Schematic. ................................................................................. 67

Figure 31. LBB1-69A-1 Schematic. ................................................................................. 67

Figure 32. LBB1-69B-1 Schematic. ................................................................................. 67

Figure 33. LBB2-12-1 Schematic. .................................................................................... 67

Figure 34. LBB2-18-1 Schematic. .................................................................................... 67

Figure 35. LBB2-27-1 Schematic. .................................................................................... 67

Tables

Table 1. Control Instrument Explanations. ....................................................................... 21

Table 2. Hi-Limit Instrument Explanations. ..................................................................... 23

Table 3. Control Instrument Operating Parameters. ......................................................... 33

Table 4. Control Instrument Set-up Parameters. ............................................................... 34

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ABOUT THIS MANUAL LBB Series Oven Owner’s Manual

6 Version 13

Table 5. Hi-Limit instrument Setup Parameters. .............................................................. 39

Table 6. Common Technical Issues and Remedies. ......................................................... 53

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LBB Series Oven Owner’s Manual ABOUT THIS MANUAL Version 13 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.

ABOUT THIS MANUAL LBB Series Oven Owner’s 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.

8 Version 13

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.

LBB Series Oven Owner’s Manual ABOUT THIS 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

Version 13 9

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 LBB 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 LBB 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.

ABOUT THIS MANUAL LBB Series Oven Owner’s 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.

10 Version 13

1.4. Conventions

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LBB Series Oven Owner’s Manual ABOUT THIS MANUAL

LBB

Model

No.

Chamber Size

in (cm)

Capacity

feet

3

(liters)

Overall Size

in (cm)

Shelves

Provided

on Shelf

Centers

in (cm)

Maximum

Number of

Shelf

Positions

Chamber

Doors

W0F D H W D

H

1-23

18

(46)

18

(46)

12

(30)

2.3

(65)

24

(61)

23

(58)

26

(66)

2 on 2”

(5.1)

5

1

1-43

24

(61)

14

(36)

22

(56)

4.3

(122)

30

(76)

19

(48)

36

(91)

2 on 2”

(5.1)

10

1

1-69

30

(76)

18

(46)

22

(56)

6.9

(195)

34

(86)

23

(58)

36

(91)

2 on 2”

(5.1)

10

2

2-12

30

(76)

20

(51)

35

(89)

12.1

(343)

36

(91)

25

(64)

51

(130)

2 on 2”

(5.1)

16

2

2-18

37

(94)

24

(61)

35

(89)

18

(510)

43

(102)

29

(74)

51

(130)

2 on 2”

(5.1)

16

2

2-27

37

(94)

37

(94)

35

(89)

27.7

(785)

43

(102)

42

(107)

51

(130)

2 on 2”

(5.1)

16

2



The LBB 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.

Version 13 11

1.5. Specifications

1.5.1. Dimensions

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ABOUT THIS MANUAL LBB Series Oven Owner’s Manual

Capacity

LBB Model Number

1-23

1-43

1-69

2-12

2-18

2-27

Maximum Load

Lbs (Kg)

200

(91)

200

(91)

400

(181)

600

(272)

600

(272)

600

(272)

Maximum Shelf Load

Lbs (Kgs)

50

(23)

50

(23)

200*

(91)

200*

(91)

200*

(91)

200*

(91)

Exhaust Capacity

CFM (LPS)

1

(0.5) 2 (0.9)

3

(1.4)

12

(5.7)

14

(6.6)

14

(6.6)



Maximum load capacity not valid on ovens with the “control

panel located on bottom” option.

Warning!

Do not exceed a total of 400 Lbs. (181 Kg) for stacked LBB169 ovens.

12 Version 13

1.5.2. Capacities

*

LBB1-69 and larger models have reinforced shelves. Standard duty (50 Lbs. maximum) shelves are also

available.

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LBB Series Oven Owner’s Manual ABOUT THIS MANUAL

Model

Volts

Amps

Hertz

Phase

Heater

KW

Cord and Plug

LBB 1-23A

120

11.6

50/60 1 1.2

Included, 15 Amp

LBB 1-23B

240

5.8

50/60 1 1.2

Included, 15 Amp

LBB 1-43A

120

15.0

50/60 1 1.6

Included, 20 Amp

LBB 1-43B

240

7.5

50/60 1 1.6

Included, 15 Amp

LBB 1-69A†

120

21.6

50/60 1 2.4

None, Hardwired

LBB 1-69B†

240

10.8

50/60 1 2.4

None, Hardwired

LBB 2-12†

240

16.4

50/60 1 3.6

None, Hardwired

LBB 2-18†

240

16.4

50/60 1 3.6

None, Hardwired

LBB2-27†

240

21.4

50/60 1 4.8

None, Hardwired



Ovens designed for 240 volts (check your oven nameplate for power requirement) will operate satisfactorily on a minimum of 208 volts, but with a 25% reduction in heater power. If your power characteristics are lower, contact Despatch industries.

Version 13 13

1.5.3. Power

If the line voltage for your LBB 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

†

Models LBB1-69, LBB2-12, -18 and -27 must be hardwired to the electric supply using 10 AWG or

larger wire 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.

ABOUT THIS MANUAL LBB Series Oven Owner’s Manual

Temperature and

Parameters

LBB Model Number

1-23

1-43

1-69

2-12

2-18

2-27

Time to temperature (approximate minutes with no load

40°C-

150°C

17

15

17

40°C-

204°C

30

26

30

33

Recovery time with door open 1 minute (approximates minutes with no load)

150°C 2 2 3 3 3 4

204°C 4 4 6 6 7 8

Temperature uniformity at:

150°C

+/- 3°C

+/- 2°C

+/- 3°C

204°C

+/- 4°C

+/- 3°C

+/- 4°C

Operating range with 20°C

ambient:

35°C- 204°C

40°C-204°C

Control Stability

± 0.5 °C



Dampers must be open to operate at the minimum temperature.



“Time to Temperature” and “Temperature Uniformity” values are based on 240V/60 Hz operation, with control panel located on top. Actual results may vary slightly depending on unit configuration and operating conditions.

14 Version 13

1.5.4. Temperature

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LBB Series Oven Owner’s Manual SAFETY



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.

Version 13 15

2. Safety

2.1. Safety Information

Do not work on the LBB 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 LBB 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 LBB Series Oven. An accidental start-up, while working on the LBB 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 LBB 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.

2. Close all valves and bleed off any pressure.

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 LBB Series Oven Owner’s Manual

Danger!

Contact with energized electrical sources may 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.

16 Version 13

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.

2.2. 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.

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 LBB Series Oven are strictly forbidden.

Never modify any electrical circuits. Unauthorized modifications can impair the function and safety of the LBB Series 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.

LBB Series Oven Owner’s Manual SAFETY

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.

Version 13 17

2.4. Fire

Keep the LBB 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 (s) as they are.

2. De-energize the machine immediately by turning OFF the DISCONNECT SWITCH.

3. Turn off the remote main disconnect (customer supplied disconnect).

4. Shut off fuel

5. Call the fire department or extinguish the fire.

2.5. Equipment Lockout Requirements

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

2.5.1. Emergency Stop

When a risk of personal injury or damage to the LBB 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.

SAFETY LBB Series Oven Owner’s Manual 18 Version 13

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LBB Series Oven Owner’s Manual THEORY OF OPERATION

Exhaust

Heater

Recirculation Fan

Figure 1. LBB Forced Convection

Benchtop Oven.

Figure 2. Horizontal Airflow through the LBB Oven.

Version 13 19

3. Theory of Operation

3.1. The LBB Series Oven

The Despatch LBB Series Ovens (Figure 1) effectively distribute heat with a processing time among the fastest of any lab oven its class. LBB Series Ovens are effectively used in testing, preheating, sterilizing, drying, aging and curing as well as other production applications. The LBB Series Ovens incorporate forced circulating airflow with precision

digital control to deliver fast processing. The overall result is efficient productivity under strenuous conditions.

The LBB Series Ovens are precise and practical. The unique Despatch design moves convected heat through stainless steel ducts on each side of the oven (Figure 2). The air is circulated with a high volume fan. The LBB Series Ovens employ higher volume fans than any competitive model. The chamber can be densely loaded without interfering with the process. For your convenience the fresh air intake is fixed. The exhaust rate is regulated by a damper on the back of the unit.

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THEORY OF OPERATION LBB Series Oven Owner’s Manual

Warning!

Do not remove the hat bracket as it distributes exhaust air and protects the exhaust opening from being completely covered.

20 Version 13

3.1.1. Oven Theory

The LBB Series forced circulating oven uses fan to circulate air through the chamber. A circulating oven is much more efficient and uniform oven than a gravity-convection oven due to the constant air movement. Soaking at a desired setpoint still depends on a number of parameters including chamber area, load mass, the ability to absorb heat and the exhaust rate. But soak times with a forced circulating oven may be shortened. The LBB Series Oven is capable of heating to 204°C (400°F). The oven uses a microprocessor-based digital control to display the actual chamber temperature at the sensing point. The temperature sensor is located to optimize control action for the entire chamber for various load conditions. While the control display may fluctuate a few degrees around the setpoint, reflecting temperature changes at the sensor location. However, overall chamber temperature remains stable. The strategic location of the sensor compensates for delays in heat convection and enhances the performance and temperature control of the oven. The oven has been designed for an overall result of quality productivity where fast processing and versatility are critical.

3.2. Control Systems

3.2.1. Primary Control Instrument

The LBB Series Oven is equipped with a microprocessor-based digital control instrument configured as a proportional controller and set to its optimum operating values (Figure 3). Initially the control instrument allows the heater to operate at full power. As the actual oven temperature reaches the setpoint, the control instrument cycles the heater on and off, minimizing process temperature fluctuations. Table 1 provides explanation for working with the control instrument.

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LBB Series Oven Owner’s Manual THEORY OF OPERATION

Display

Description

Main (PV) Display

Typically displays actual oven temperature. Press SET/ENT to display setpoint. Displays parameter code and value.

Key

Press to switch between PV and SP displays. Enter data using or . Press repeatedly to switches through parameter displays.

Decrease setpoint or mode parameter

Increase setpoint or mode parameter

SP

Lit when setpoint value displays

OUT

Lit when control calls for heat

AL1 –2

N/A

Figure 3. LBB Series Oven Primary Control Instrument

Version 13 21

Table 1. Control Instrument Explanations.

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THEORY OF OPERATION LBB Series Oven Owner’s Manual



Reset the Hi-Limit instrument by pressing the RESET button on the instrument.

Figure 4. Protocol Plus Displays and Control Buttons.

22 Version 13

3.2.2. Optional 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.

3.2.3. Hi-Limit Instrument

The LBB Series Oven is equipped with a Hi-Limit instrument (Figure 5). The Hi-Limit instrument protects the oven or product by discontinuing the heating process when the Hi-Limit is exceeded.

Set the Hi-Limit instrument to a temperature 10°C - 14°C higher than the control instrument setpoint, or to a temperature that should not be exceeded in the process. If the setting on the Hi-Limit instrument is exceeded the heater shuts down. See Table 2 for explanation about the Hi-Limit instrument.

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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

LBB Series Oven Owner’s Manual THEORY OF OPERATION

Features

Description

OP1

Output 1 status value. (OP2 normally not used for LBB Ovens).

C/ F

Degree indicator.: Celsius or Fahrenheit

PV

Process value

HSP1

High limit setpoint 1. (LSP1 typically not used for LBB Ovens).

SP2

Setpoint 2 for output 2 (typically not used for LBB Ovens)

LOCK

Lock status indicator

Scroll Key, used for advancing available displays

Increases a setpoint or mode parameter

Decreases a setpoint or mode parameter

Reset the high limit, return to normal display

Figure 5. Hi-Limit Instrument.

Version 13 23

Table 2. Hi-Limit Instrument Explanations.

3.2.3.1. Product Hi-Limit Instrument

If the product being processed has a critical high temperature limit, use the Hi-Limit instrument as a product Hi-Limit instrument. Set the Hi-Limit instrument to a temperature somewhat below the temperature at which the product could be damaged.

3.2.3.2. Oven Hi-Limit Instrument

If the product being processed does not have a critical high temperature limit, use the HiLimit as an oven Hi-Limit instrument to protect the oven equipment. Set the Hi-Limit to 204°C.

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ASSEMBLY & SETUP LBB Series Oven Owner’s Manual

24 Version 13

4. Assembly & Setup

Assembly and Setup provides directions for unpacking and installing your Despatch LBB Series Oven.

4.1. Unpack & Inspect the LBB 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 One (1) Warranty card Two (2) Shelves One (1) Damper assembly

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

equipment.

4.2. Set-up the LBB Series Oven

4.2.1. Select Oven Location/Operating Environment

The Despatch LBB 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.

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LBB 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 13 25

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.

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ASSEMBLY & SETUP LBB Series Oven Owner’s Manual



Read the Model LBB nameplate (top of oven or top of control area under the door) for proper power requirements before proceeding with wiring and power connections (Figure 6).

Danger!

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

Figure 6. LBB Series Oven Name Plate.

26 Version 13

4.2.3. Wiring & Power Connections

Models LBB1-23A, -23B, -43A and -43B come equipped with an appropriate plug and cord. Models LBB1-69A, -69B and LBB2-12, -18, -27 must be hardwired to the electric supply using 10 AWG or larger wires suitable for at least 75 °C (167 °F).

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LBB Series Oven Owner’s Manual ASSEMBLY & SETUP

Figure 7. LBB Series Oven with Top Removed.

Figure 8. Wiring Access through Rear of Oven.

Figure 9. Close-up of Connector Block.

Version 13 27

To wire the LBB Series Oven (for units requiring hardwiring):

1. Remove the top cover for access to the connector block (Figure 7).

2. Run the wire through the rear access hole (Figure 8) and connect the appropriate wires at the connector block (Figure 9).

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ASSEMBLY & SETUP LBB 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. The purchaser and operator are responsible ensure 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.

Warning!

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

Warning!

Never operate the LBB Series Oven at a temperature in excess of the maximum operating temperature of 204°C (400°F).

28 Version 13

5. Operation

5.1. Load Oven

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 1.5.3). 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.

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LBB Series Oven Owner’s Manual OPERATION

Caution!

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

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.



The exhaust vent may have to be closed to reach the maximum temperature of 204°C, especially if operating on 208 volts. The exhaust vent may need to be opened to operate properly at the lower range of the oven's design.

Version 13 29

For units where the controls are on the bottom, 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.

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. Refer to the Set-up instructions (4.2.2) for more information.

□ Ventilation. An exhaust opening resides in the rear of the unit.

□ Helpful hints:

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

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OPERATION LBB Series Oven Owner’s Manual

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.



For fastest oven heat-up time, close the exhaust vent. After the desired temperature is reached, adjust the vent as needed.



If the Hi-Limit instrument is exceeded the heater shuts down. Reset the Hi-Limit instrument by pushing RESET on the HiLimit instrument.

30 Version 13

5.3. Operating Procedure

5.3.1. Start Oven

1. Turn POWER ON (Figure 10). The circulating fan will start.

2. Set exhaust vent to desired opening by adjusting the damper at the rear of the oven (Figure 11). a. Adjust the vent for maximum performance at various operating temperatures.

3. Enter desired setpoint on the Hi-Limit instrument. a. Set the Hi-Limit instrument to a temperature 10° to 14°C higher than the desired

setpoint or to a temperature that should not be exceeded in the process.

b. If the LOCK on the Hi-Limit instrument is lit, press and hold the RESET for four

(4) seconds to enable ▲ and ▼.

c. Press . HSP1 will light. d. Use ▲ and ▼ to set the high limit temperature.

e. Press RESET (or ) once to enter the value and return to the process variable

PV mode.

4. Enter setpoint on the Control instrument. a. Press until the SP lights. b. Use ▲ and ▼ to set the operating temperature. c. Press to enter the setpoint. d. Press again to display the process temperature.

5. Turn HEATER ON.

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LBB Series Oven Owner’s Manual OPERATION

Figure 10. LBB Series Oven Control Panel.

Figure 11. Adjust Damper to Set Exhaust Vent by rotating the outer component.

Version 13 31

a. When the process value on the Control instrument reaches setpoint, OUT cycles

ON and OFF to maintain the temperature setpoint.

b. OUT lights when the control calls for heat.

6. Turn HEATER OFF after the heating cycle is complete.

7. Do not turn the fan OFF until the oven chamber temperature is below 100◦C (212◦F).

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OPERATION LBB Series Oven Owner’s Manual

Danger!

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



In most applications it is not necessary to alter the oven’s

settings, except for Setpoint.

Warning!

Never operate oven at a temperature in excess of the maximum operating temperature of 204°C (400°F).

32 Version 13

5.4. Working with the Control Instrument

The LBB Series Oven is factory tested and the controls have been factory-set for normal operating conditions.

This section contains information for changing setpoints, programming modes, and displaying temperature, along with instructions for oven zone calibration, parameter setup mode and troubleshooting.

5.4.1. Change Setpoint

To enter Setpoint on the Control instrument:

1. Press . SP will light.

2. Use ▲ and ▼ to set the operating temperature. a. The right decimal point LED will flash indicating the Setpoint is being changed. b. The right decimal point LED stops flashing when the new value has been entered.

3. Press to enter the Setpoint.

4. Press again to display the process temperature.

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LBB Series Oven Owner’s Manual OPERATION

Warning!

Changing program parameters alters the function of the Control. Proceed carefully and fully understand each parameter before changing that parameter.

Code

Name

Description

Settings

CtL

Control Mode

Determines whether controller functions as a time proportional or an on/off control.

PID

At

Auto-tuning

OFF for PID tuning, ON for controller to tune process

OFF

P

Proportional Band

Expressed in degrees, value determines the band width on both sides of the setpoint within which the control provides proportional control.

4 (8 if F)3

I

Integral Time

Expressed in seconds, value corrects for errors in actual temperature versus the setpoint

15

Version 13 33

5.4.2. Control Instrument Parameter Programming Mode

Control instrument parameters are set through the Operating and Set-up modes. In most applications, it is not necessary to alter the oven settings. The following instructions describe how to access, view and if desired, change the parameters. Once the Operating and Set-up modes are accessed, SP will start blinking on and off. Table 3 and Table 4 explain the Operating and Set-up Mode parameters.

The Control Instrument will not allow the display to be altered improperly. The Control Instrument will automatically exit the Parameter Programming mode if no keys are pressed for about two (2) minutes.

5.4.2.1. Entering Control Instrument Operating and Set-up Mode

To enter the Operating and Set-up Mode (Figure 3):

1. Press for three (3) seconds.

2. Press until the desired parameter displays. See Table 3 for more information.

3. Press ▲ or ▼ to display the value.

4. Use ▲ or ▼ to move to the desired setting.

5. Press to enter the value.

6. Press and hold for three (3) seconds to return to the display mode.

Table 3. Control Instrument Operating Parameters.

3

If P is not displayed the Control Mode (CtL) must be first set to PID.

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OPERATION LBB Series Oven Owner’s Manual

d

Derivative Time

Expressed in seconds, value shows the effect of the derivative time is in direct proportion to the time setting

0

Ct

Cycle Time

Expressed in seconds, value shows total time for one ON/OFF cycle of the controller output during the proportional action

1

FL

Input Filter

Expressed in seconds. Use this function when the PV may fluctuate greatly (for example, when an input signal contains noise)

0

bS

PV Bias (Offset)

Expressed in degrees, from –199 to 999. Use this parameter to set the actual oven temperature to the controller display.

0

LoC

Key Lock

Provides levels of access to the controller:

0 = No key lock, full access to controller 1 = Prevents changing of all parameters except

setpoint

2 = Prevents all parameters from being changed

including the setpoint

-1 = Set to enter the Set-up parameter setting display.

1

nr

Manual Reset

Only when I & d are OFF. Expressed in percent. Controller outputs this value when process variable equals setpoint, but only if I = 0.

N/A

HyS

Hysteresis

Only when CtL is OFF, change CtL to PID) Expressed in degrees. When CtL = OFF, this value determines the change in temperature needed to turn controller output from full OFF to full ON.

N/A

Code

Name

Description

Settings

In

Input Type

Set for type of input and whether PV is in °C or °F

5 (35 if F)

SPH

Setpoint High

The maximum setpoint limit for oven. The user cannot set the setpoint above the maximum setpoint.

204 (400 if F)

34 Version 13

5.4.2.2. Control Instrument Operating Mode Notes

The controller is factory set to LoC=1 (allowing only the setpoint to be changed).

This setting prevents inadvertent changing of control parameters.

If necessary to alter control parameters, change the LoC=1 to LoC=0. See Section

5.4.2.1 for more information.

When LoC = -1, parameters are displayed in the order shown in the Set-Up

Parameters table (Table 4).

Note: If unable to change setup parameters:

o Change the LoC = 0 o Press the

until LoC appears again

o Change LoC = -1 o Press the

Table 4. Control Instrument Set-up Parameters.

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LBB Series Oven Owner’s Manual OPERATION

SPL

Setpoint Low

The minimum setpoint limit of oven. The user cannot change the setpoint below this lower setpoint limit.

0 (32 if

F)

SC

Super Function

Despatch recommends leaving the SC feature OFF

OFF

dr

Direct/Reverse Action

Direct/Reverse action. This value is set for 0 (reverse action).

0

dSP

PV/SP Display

Priority of PV/SP display. This parameter either displays the PV (process variable) or SP (setpoint).

0 = process variable 1 = setpoint

0

Warning!

Program parameter changes will alter the function of the Control instrument. Proceed carefully and fully understand each parameter before changing that parameter.

Version 13 35

5.4.3. Change Control Instrument Display from Centigrade to Fahrenheit

Configure the Control instrument for either °C or °F. Use the following steps to change control from displaying °C to °F:

1. Press and hold for three (3) seconds. a. CtL displays. b. SP will flash indicating the Control Instrument has entered Operating Parameter

mode.

2. Press until LoC displays.

3. Press or to enter parameter.

4. Press the to set the value to –1. a. SP will flash rapidly indicating the Control Instrument has entered Set-Up

Parameter mode.

5. Press to enter the value. a. In displays. b. Press the or to enter the parameter. c. Note: If unable to change setup parameters, follow this procedure:

i. Press and hold for three (3) seconds to return to

the operation mode.

ii. Change the LoC to 0. iii. Press until LoC displays. iv. Change LoC to -1.

v. Press .

6. Enter the value 35. a. The right decimal point LED will flash indicating that the setpoint is being

changed.

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OPERATION LBB Series Oven Owner’s Manual



To change from Fahrenheit to Centigrade, repeat the steps in Section 5.4.3 using In = 5, SPH = 204, SPL = 0

Warning!

Changing program parameters alters the function of the Control. Proceed carefully and fully understand each parameter before changing that parameter.



Load the chamber with a standard amount of product to simulate a specific operation condition.

36 Version 13

b. The decimal will stop flashing when the new value has been entered. c. Press to enter the value.

7. Press until SPH displays. a. Press or to enter the desired parameter.

8. Enter a value 400. a. Press to enter the value.

9. Repeat steps 7-8 for SPL .

10. Enter a value of 32.

11. Press and hold the for three (3) seconds to return to the operation mode. a. The control now reads in degrees Fahrenheit. b. Enter the desired setpoint.

Refer to Table 4 to change tuning parameters, if necessary.

5.4.4. Oven Zone Calibration

The Control instrument has been factory-tested and calibrated. Under normal operating conditions, recalibration should not be necessary. However, to recalibrate the Control Instrument for a specific operating condition, follow the instructions below.

1. Required Equipment: Temperature measuring device with a compatible temperature sensor.

2. Verify that bS (PV Bias) programmed in the Control instrument is set to 0. For more information on programming parameters refer to Section 5.4.2.1.

3. Locate the temperature sensor of the temperature measuring device at the center of the chamber.

4. Operate the oven until it reaches the desired operating temperature and the Control instrument is regulating. a. It will take several minutes for the unit to stabilize at the controlled temperature.

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LBB Series Oven Owner’s Manual OPERATION

Danger!

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

Warning!

Never operate oven at a temperature in excess of the maximum operating temperature of 204°C (400°F).

Version 13 37

b. Allow at least 30 minutes of operation at the stabilized temperature before

proceeding.

5. Subtract the average controlled temperature (value appearing on the Control instrument display) from the actual oven temperature (value appearing on the temperature measuring device display). a. Note that the Control instrument and the temperature sensing device must be in

the same scale ( C or F).

5.4.5. Set the Hi-Limit

The oven has been factory-tested with the Hi-Limit instrument factory-preset for normal operating conditions. In most applications, it will not be necessary to alter the oven's settings, except for the Setpoint. This section contains information and reference material to change Setpoint, access the Set-up mode and change display between °C and °F.

The Hi-Limit instrument was carefully programmed at the factory using the Operating and Set-up mode. The parameters that may be accessed include; display functions, and thermocouple selection.

5.4.5.1. Change the Hi-Limit Instrument Setpoint

Enter setpoint on the Hi-Limit instrument. Set Hi-Limit instrument to a temperature 10°C to 14°C higher than the setpoint or to a temperature that should not be exceeded in the process.

1. If on the Hi-Limit instrument is lit, press and hold to enable and .

2. Press

, HSP1 will light.

3. Use and to set high limit temperature.

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for four (4) seconds

OPERATION LBB Series Oven Owner’s Manual

Warning!

Changing program parameters alters the function of the Hi-Limit. Proceed carefully and fully understand each parameter before changing that parameter.



When changing between centigrade and Fahrenheit, the setup parameters Filt, o1.Hy, HSP.L and HSP.H settings convert automatically.

38 Version 13

4. Press

or

once to return (also enters the value) to the process variable

PV mode.

5. If the Hi-Limit instrument is exceeded the heater will shut down.

6. Reset the Hi-Limit instrument by pushing on the Hi-Limit instrument.

5.4.6. Hi-Limit Instrument Parameter Setup Mode

Set Hi-Limit instrument parameters using the Operating and Set-up modes (Section

5.4.2.1). In most applications, it is not necessary to alter the oven settings. The following

instructions describe how to access, view and, if desired, change the parameters.

If the on the Hi-Limit instrument is lit, press and hold enable and . The Hi-Limit instrument will automatically exit Setup mode if no keys are pressed for about two (2) minutes.

1. Press and hold

2. Press

until desired parameter displays. See the Setup Parameter Table for more

for four (4) seconds to enter Setup mode.

information. a. The display will alternate between the parameter name and value. b. Use or to move to the desired setting. c. Press to the value and advance to the next parameter.

3. To leave setup parameters press . The Hi-Limit instrument automatically exits Setup mode if no keys are pressed for about two (2) minutes.

for four (4) seconds to

5.4.7. Hi-Limit Instrument Setup Parameters

Table 5 explains the Hi-Limit instrument setup parameters.

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LBB Series Oven Owner’s Manual OPERATION

Code

Name

Description

Settings

inPt

Input type

Select thermocouple type. LBB Series Ovens use type J thermocouples

J_tC

unit

Process unit.

Select between °C and °F for reading process temperature

C (or F)

rESo

Display resolution.

Select location of decimal point on process-related parameters

No.dP

SHif

PV shift value (offset).

Moves the display temperature to the oven temperature

0

Filt

PV filter.

If the process value is unstable to read, increasing this value steadies the input signal.

0

out1

Output 1 function.

Function of the output. Must be set to Hi. for Hi-Limit control.

Hi.

o1.Hy

Output 1 hysteresis value.

Amount of degrees the temperature must be below the setpoint temperature before the Hi-Limit can be reset

2.0

HSP.L

Lower limit of HSP1.

Minimum temperature setting for the Hi-Limit

0 (32 if

F)

HSP.H

Upper limit of HSP1.

Maximum temperature setting for the Hi-Limit

204 (400 if F)

out2

Second output

Despatch does not use this function

None

diSP

Normal display format.

Used to select the display in normal condition:

PV = Process Value SP! = Hi-Limit Setpoint SAFE = The word “safe” in normal condition

PV

PuHi

Process value high

Read-Only Data: Maximum process value since last UNLOCK operation.

None

PuLo

Process value low

Read-Only Data: Minimum process value since last UNLOCK operation.

None

t.Abn

Abnormal time

Total accumulated minutes of abnormal conditions since last UNLOCK operation.

None

Warning!

Changing program parameters alters the function of the Control. Proceed carefully and fully understand each parameter before changing that parameter.

Version 13 39

Table 5. Hi-Limit instrument Setup Parameters.

5.4.8. Change Hi-Limit instrument Display from Centigrade to Fahrenheit

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OPERATION LBB Series Oven Owner’s Manual

40 Version 13

Configure the Hi-Limit instrument for either °C or °F. Use the following steps to change Hi-Limit instrument from displaying °C to °F (and for changing back):

1. If on the Hi-Limit instrument is lit, press an hold for four (4) seconds to

enable and .

2. Press and hold for four (4) seconds to enter Setup mode.

3. Press until unit displays.

4. Press or to display value.

5. Use or to move to the desired setting.

6. Press to enter the value and advance to the next parameter.

7. Press to return the Hi-Limit instrument to normal mode.

8. The Hi-Limit instrument has been changed, enter the desired setpoint.

5.5. Working with Optional Protocol Plus Controller Operating Modes

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

Protocol Plus controller.

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LBB Series Oven Owner’s Manual MAINTENANCE

Danger!

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

Danger!

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

Version 13 41

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.

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.

MAINTENANCE LBB Series Oven Owner’s Manual

Danger!

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

42 Version 13

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 LBB 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.

6.3.1. Test Control Instrument

Test the Control instrument every 40 hours:

Check that the Control instrument OUT LED is cycling ON and OFF Verify that the heater works

6.3.2. Test Hi-Limit Instrument

Test the Hi-Limit instrument every 40 hours. With the oven operating at a set temperature, set Hi-Limit instrument down to the setpoint operating temperature:

The Hi-Limit instrument is tripped when OP1 lights Push after adjusting the Hi-Limit instrument back to a higher setting, or by

letting the oven temperature drop a few degrees based on the hysteresis value of the Hi-Limit instrument

6.4. Replacement Parts

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LBB Series Oven Owner’s Manual MAINTENANCE

Danger!

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

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

Danger!

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

Version 13 43

To order or return parts, contact Despatch Service and 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.

6.4.1. Replace the Control Instrument

Tools needed:

One-quarter (1/4) inch socket set Screwdriver T20 Torx bit driver

1. Disconnect power.

2. Remove four screws from the face of the control panel (Figure 12).

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MAINTENANCE LBB Series Oven Owner’s Manual

Figure 12. Remove Control Panel to Access Control Instrument.

Figure 13. Providing easy access to the Control instrument.

44 Version 13

3. Slide the panel forward (Figure 13).

4. Remove wires from the old control instrument, carefully noting which wires connect

to which terminals (Figure 14).

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.

LBB Series Oven Owner’s Manual MAINTENANCE

Control Instrument Mounting Bracket

Figure 15. Prepare to remove control instrument by removing the mounting bracket.

Thermocouple

wires

Control Instrument

Hi-Limit Instrument

Figure 14. Remove Old Control and Hi-Limit Instruments and Wiring (Rear view).

Version 13 45

5. Move the Control instrument mounting bracket back and off (Figure 15).

6. Remove old Control instrument from the panel.

7. Install new Control instrument into the control panel.

8. Secure instrument mounting bracket.

9. Reattach wires to the new Control instrument. Double-check that the wires are

connected correctly. See Figure 16 for correct Control instrument connections.

10. Replace control panel.

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.

MAINTENANCE LBB Series Oven Owner’s Manual

Danger!

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

Figure 16. Connections to Control Instrument.

46 Version 13

6.4.2. Replace Hi-Limit Instrument

Tools needed:

One-quarter (1/4) inch socket set Screwdriver

T20 Torx bit driver

1. Disconnect power.

2. Remove four screws from the face of the control panel (Figure 12).

3. Slide the panel forward (Figure 13).

4. Remove wires from the old Hi-Limit instrument, carefully noting which wires

connect to which terminals (Figure 14).

5. Disconnect Hi-Limit instrument connector from circuit board (Figure 17).

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.

LBB Series Oven Owner’s Manual MAINTENANCE

Hi-Limit Connector Block

Figure 17. Hi-Limit Connector Block on Control Board.

Figure 18. Press and Hold Tabs to Remove Hi-Limit Instrument.

Version 13 47

6. Disconnect the thermocouple wires (Figure 14).

7. Press and hold down the tabs holding the Hi-Limit instrument to the control panel and

slide it out (Figure 18).

8. Install new Hi-Limit instrument into the control panel.

9. Replace mounting bracket.

10. Connect Hi-Limit instrument connector plug to the circuit board (Figure 17).

11. Reattach thermocouple wires. Make sure that the wires are connected correctly.

(Figure 14). See Figure 19 for correct Hi-Limit instrument connections.

12. Replace control panel.

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.

MAINTENANCE LBB Series Oven Owner’s Manual

Figure 20. Connections to Hi-Limit Instrument.

Figure 19. Connections to Hi-Limit Instrument.

48 Version 13

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.

LBB Series Oven Owner’s Manual MAINTENANCE

Danger!

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

Figure 21. Remove Screws to Remove Each Duct.

Version 13 49

6.4.3. Replace (Optional) Protocol Plus Controller

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

Controller.

6.4.4. Replace Heater Unit

Tools needed:

3/8 inch wrench One-quarter (1/4) inch socket set T20 Torx bit driver

1. Disconnect power.

2. Remove shelves (Figure 21).

3. Remove left and right side ducts

a. Remove screws from each duct. b. Remove duct from oven.

4. Remove heater cover (located on the top or

bottom of the oven, depending on model). a. Remove screws from the heater cover. b. Remove heater cover from the oven.

5. Disconnect heater leads from heater element

with wrench, carefully noting which wires connect to which terminals.

6. Remove old heater (Figure 22).

a. Remove screws holding the heater frame

to the oven body.

b. Remove heater and discard.

7. Install new heater

a. Secure new heater frame with screws. b. Attach heater leads to appropriate

terminals.

8. Replace heater cover.

9. Replace side ducts.

10. Replace shelves.

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MAINTENANCE LBB Series Oven Owner’s Manual

50 Version 13

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.

LBB Series Oven Owner’s Manual MAINTENANCE

Danger!

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

Figure 22. Typical Heating Element.

Version 13 51

6.4.5. Replace Fan Motor

Tools needed:

One-quarter (1/4) inch socket set 5/32 inch Allen wrench

1. Disconnect power.

2. Remove shelves (Figure 21).

3. Remove left and right side ducts

a. Remove screws from each duct. b. Remove duct from oven.

4. Remove heater cover (located on the top or bottom of the oven, depending on model).

Screwdriver T20 Torx bit driver

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MAINTENANCE LBB Series Oven Owner’s Manual

Figure 23. Fan Motor Location and Close-up.

52 Version 13

a. Remove screws from the heater

cover.

b. Remove heater cover from the oven.

5. Loosen setscrews (2) on fan wheel in

middle of oven top. Access the fan wheel through the heater opening or by disconnecting and removing the heater assembly. Refer to Section 6.4.4 for information on removing the heater unit.

6. Remove top cover to reveal fan motor

(Figure 23).

7. Remove fan motor

a. Disconnect motor leads from circuit

board

b. Unscrew screws (4) holding motor

mounts to body

c. Lift fan motor from oven body.

8. After running at temperature, the fan

wheel may stick to the shaft. Separating the fan wheel from the fan motor shaft may require force.

9. Take motor mount off old motor.

10. Put motor mount onto new motor.

11. Replace fan motor.

a. Reattach motor to oven body. b. Reattach motor lead plug to circuit board.

12. Replace top cover.

13. Put fan wheel onto shaft from inside of oven.

14. Adjust fan wheel for 3/16-inch clearance between wheel and inlet ring.

15. Tighten setscrews on the fan wheel.

16. Check that setscrews hit the flats machined into the motor shaft.

17. Replace heater pan assembly if removed. Refer to Section 6.4.4 for information on

removing the heater unit.

18. Replace heater cover.

19. Replace side ducts.

20. Replace shelves.

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LBB Series Oven Owner’s Manual MAINTENANCE

Technical Issue

Probably Cause

Suggested Remedy/Next Step

Failure to heat or

only heats up to

30–50 °C

No power

Check power source and/or oven and wall fuses.

Burned out heater(s)

Replace element (see warranty statement).

Control Instrument malfunction

Check control parameters. Replace controller if OUT LED on controller does not turn on.

Loose wire connections

Disconnect power and check connections behind control panel.

Slow heat up

Improperly loaded workload

Reduce load or redistribute load in chamber.

Low line voltage

Supply sufficient power and proper connections. Check for circuit overload.

1 or 2 heating elements burned out

Check heater amperage on the nameplate. Replace burned out element (see warranty statement, back page).

Vent is wide open.

Close vent.

Fan motor failure

Replace fan motor.

Frequent heater element burnout

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 Control and Hi-Limit instruments.

Fan motor failure

Replace fan motor.

Erratic temperature

Control instrument malfunction

Check control parameters before replacing the Control instrument.

Inaccurate temperature

Control instrument miscalibration

Check control parameters. Recalibrate Control instrument.

Excess surface or door temperature

Door seal deterioration

Replace door seal.

Door closed into top or bottom latch only

See specific difficulty below for this problem.

Improper airflow Fan motor failure

Replace fan motor.

Unbalanced fan wheel

Reposition fan wheel within 3/10” from top of

housing. Replace fan wheel.

Excessive vibration

Dirty fan wheel

Clean fan.

Unbalanced fan wheel

Replace fan wheel.

Grinding noise

Fan wheel has shifted or fallen.

Inspect the wheel. Reposition fan wheel within

0.25” from top of housing.

Version 13 53

7. Troubleshooting

Like any equipment operating over long periods of time, technical issues may arise. Table 6 lists the common technical issues, their causes and remedies.

Table 6. Common Technical Issues and Remedies.

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TROUBLESHOOTING LBB Series Oven Owner’s Manual

Technical Issue

Probably Cause

Suggested Remedy/Next Step

Debris has fallen into fan through shaft collar.

Inspect the wheel for damage. Remove debris.

Oven will not control at Setpoint

Hi-Limit instrument set too low

Set the Hi-Limit higher.

Control instrument malfunction

Check control parameters before replacing Control instrument.

Air friction of recirculation fan

Open exhaust air vent. Unit will not control at minimum operating temperature with vent(s) closed.

Heater does not shutdown until temp. reaches the Hi-Limit setting

Control instrument malfunction

Verify control parameters. Replace control instrument if no output exists.

SSR Relay malfunction

Replace relay if Control output exists.

Door closes into top or bottom latch only

Uneven latch tension adjustment

Ensure that latch strike is contacting center of latch. Adjust mounting angle as required. Adjust door for even top and bottom latch tension by turning screws on ends of latch. Clockwise increases tension on latch. Counterclockwise decreases tension.

Door will not stay closed

Inadequate latch tension

Ensure that latch strike is contacting center of latch. Adjust mounting angle to center as required. Increase latch tension by turning screws on end of latch clockwise. Adjust in even increments on all four screws to keep door pull even.

54 Version 13

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LBB Series Oven Owner’s Manual TROUBLESHOOTING Version 13 55

8. Appendices

8.1. Standard Products Warranty

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APPENDICES LBB Series Oven Owner’s Manual

Figure 24. Optional LBB Oven Stand.

56 Version 13

8.2. Optional Equipment

8.2.1. Assemble Oven Stand

1. Install four rubber grommets into holes in the stand (Figure 24).

a. For LBB1-69 stands, the rear grommets mount into the forward set of rear

holes.

b. On LBB2-12 stands the rear grommets mount into the set of holes closest to

the rear of the stand.

2. Place the oven on top of the stand. The four embossed areas in the bottom of the

oven should center in the grommets.

3. Using the self-drilling screw and large flat washer provided, install through each

embossed area as shown below.

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LBB Series Oven Owner’s Manual APPENDICES



Actual timer may vary from the model pictured (Figure 25).

Figure 25. Timer Option Displays and Switches.

Version 13 57

8.2.2. Timer Option

Use the timer option to count down in hours toward powering the heater OFF (Figure 25). When the timer is ON, the

delayed contact remains closed allowing power to the heater. The range display increments from 0 and the Timing LED blinks slowly. When the preset value is reached and the timing cycle is complete, the Timing LED blinks rapidly and the delayed contact opens and shuts off the heater. The heater remains off until either the TIMER switch is turned OFF, or reset.

Range and Decimal Point Switches are available only when the Time is not mounted in the panel, to discourage tampering.

8.2.2.1. Operating the Timer

1. Rotate each knob to the desired time setting.

2. Turn the Timer Switch to ON. The timer is now incrementing from 0 to the desired

setting.

3. Set the HEATER switch to ON, if not already ON.

4. When the timer reaches the preset value, the heater shuts OFF.

5. To reset the timer, set the Timer Switch OFF then to ON.

6. To manually control the time, set Timer Switch OFF.

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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

APPENDICES LBB Series Oven Owner’s Manual

Danger!

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

58 Version 13

8.2.2.2. Configure the Timer

The timer is configured for XX.X hours (that is, two positions left of the decimal, one to the right) from our factory. The timer can be easily set up for different timing ranges. Follow these instructions to configure the timer:

1. Remove power from oven.

2. Remove top cover.

3. Remove socket from rear of timer.

4. Remove timer panel mounting bracket and remove timer from panel.

5. Using a small screwdriver, insert it the Range and Decimal Point Switch slots for the

timer (Figure 25). a. Slide the Range Switch to the desired position. Verify range by looking in face of

timer in the range window.

b. Slide the Decimal Point switch to the desired position. Verify Decimal Point

position by looking at the decimal position in face of timer.

6. Remount timer in panel.

7. Reattach timer socket to timer.

8. Replace top cover.

9. Apply power to oven and follow instructions in the timer operation section.

8.2.3. Timer Option with Audible and Visual Alarm

The Timer option sounds an alarm and turns on a light when the timer times out.

Clear the alarm condition by turning the heater switch OFF. Reset the timer before turning heater switch ON. Turning the timer switch off also clears the alarm condition, but the heater remains

ON.

Each oven schematic (Section 0) shows the wiring for this option.

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.

LBB Series Oven Owner’s Manual APPENDICES Version 13 59

8.2.4. High Alarm Limit Option

The High Alarm Limit option sounds an alarm and turns on a light when a high limit condition occurs.

Silence the alarm horn by pressing the alarm silence switch. The light remains ON. Clear the high limit condition to clear the alarm. See Troubleshooting (Section 7) for

solutions to high limit conditions.

Reset the Hi-Limit instrument whenever it has tripped. Reset the Hi-Limit Instrument

by allowing the oven chamber to cool slightly (or by setting the Hi-Limit Instrument by several degrees) and pushing .

Each oven schematic (Section 0) shows the wiring for this option.

8.2.5. Recorder Option

The circular chart recorder uses and independent thermocouple to record the user’s process. Charts used are either 24 hour or 7 day. See the recorder manufacturer’s manual

supplied with this manual. Each oven schematic (Section 0) shows the wiring for this option.

8.2.6. Stacking Kit Assembly Instructions (Only for models LBB123, LBB1-43 and LBB1-69 )

1. Locate the four stacking kit brackets found in the kit.

2. Place each of the brackets on top of each of the four corners of one of the lower ovens

in the stack being assembled.

3. Slide the angle of each bracket into the slots in the embossed area on top of the oven

(Figure 26).

4. Use the four 10-16 x .50 screws included in the kit to attach the brackets to the oven

top.

5. Place the upper oven onto the lower one. The embossed feet on the upper oven should

fit into the brackets attached in the last three steps.

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 LBB Series Oven Owner’s Manual

Figure 26. Stacking Kit Assembly Components.

60 Version 13

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.

LBB Series Oven Owner’s Manual APPENDICES

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit Despatch L91

144749

1

Control - Des2000

007818

1

Heater 1.2kw 120/240v

145858

1

Door Seal

148048

1

Door Pull

008199

2

Latch Ay

145828

2

Standard Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

006049

1

Control Compartment Muffin Fan

150131

1

Circuit Board 120v

123306

1

Fuse Atdr-04.00a Motor

125562

1

Fuse Atdr-12.00a Heater

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

007818

1

Heater 1.2kw 120/240v

145858

1

Door Seal

148048

1

Door Pull

008199

2

Latch Ay

145828

2

Standard Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

123692

2

Fuse Atdr-6.00a Heater

Version 13 61

8.3. Part Lists

8.3.1. LBB1-23A-1

Table 7. LBB1-23A-1 Parts.

8.3.2. LBB1-23B-1

Table 8. LBB1-23B-1 Parts.

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 LBB Series Oven Owner’s Manual

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

054353

1

Heater 1.6kw 120/240v

145920

1

Door Seal

148048

1

Door Pull

008199

2

Latch Ay

146025

2

Standard Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

006049

1

Control Compartment Muffin Fan

150131

1

Circuit Board 120v

123306

1

Fuse Atdr-04.00a Motor

144785

1

Fuse Atdr-17.5a Heater

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

054353

1

Heater 1.6kw 120/240v

145920

1

Door Seal

148048

1

Door Pull

008199

2

Latch Ay

146025

2

Standard Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

144799

2

Fuse Atdr-8.00a Heater

62 Version 13

8.3.3. LBB1-43A-1

Table 9. LBB1-43A-1 Parts

8.3.4. LBB1-43B-1

Table 10. LBB1-43B-1 Parts

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.

LBB Series Oven Owner’s Manual APPENDICES

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

007819

1

Heater 2.4kw 120/240v

145725

1

Door Seal

008057

3

Center Door Seal

148048

1

Door Pull

008199

2

Latch Ay

146024

2

Standard Shelf

094717

2

Reinforced Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

006049

1

Control Compartment Muffin Fan

150131

1

Circuit Board 120v

123306

1

Fuse Atdr-04.00a Motor

134923

1

Fuse Atdr-25.00a Heater

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

007819

1

Heater 2.4kw 120/240v

145725

1

Door Seal

008057

3

Center Door Seal

148048

1

Door Pull

008199

2

Latch Ay

146024

2

Standard Shelf

094717

2

Reinforced Shelf

007281

1

Fan Wheel

008333

1

Motor 00.04hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

125562

2

Fuse Atdr-12.00a Heater

Version 13 63

8.3.5. LBB1-69A-1

Table 11. LBB1-69A-1 Parts.

8.3.6. LBB1-69B-1

Table 12.LBB1-69B-1 Parts.

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 LBB Series Oven Owner’s Manual

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit Despatch L91

144749

1

Control - Des2000

007878

1

Heater 3.6kw 208/240v

145773

1

Door Seal

008057

4

Center Door Seal

148048

1

Door Pull

008199

2

Latch Ay

145779

2

Standard Shelf

146023

2

Reinforced Shelf

015876

1

Fan Wheel

145783

1

Motor 00.25hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

124475

2

Fuse Atdr-20.00a Heater

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

007818

3

Heater 1.2kw 120/240v

145814

1

Door Seal

008057

4

Center Door Seal

148048

1

Door Pull

008199

2

Latch Ay

016471

2

Standard Shelf

105498

2

Reinforced Shelf

015876

1

Fan Wheel

145783

1

Motor 00.25hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

124475

2

Fuse Atdr-20.00a Heater

64 Version 13

8.3.7. LBB2-12-1

Table 13. LBB2-12-1 Parts.

8.3.8. LBB2-18-1

Table 14. LBB2-18-1 Parts

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.

LBB Series Oven Owner’s Manual APPENDICES

Part Number

Quantity

Description

144755

1

Thermocouple

140097

2

Switch For Power And Heater

057345

1

Relay Heater SSR

165051

1

Hi-Limit - Despatch L91

144749

1

Control - Des2000

007819

2

Heater 2.4kw 120/240v

145814

1

Door Seal

008057

4

Center Door Seal

148048

1

Door Pull

008199

2

Latch Ay

016472

2

Standard Shelf

105497

2

Reinforced Shelf

015876

1

Fan Wheel

145783

1

Motor 00.25hp 110/220v

015229

1

Control Compartment Muffin Fan

150132

1

Circuit Board 240v

117172

2

Fuse Atdr-03.00a Motor

134923

2

Fuse Atdr-25.00a Heater

Version 13 65

8.3.9. LBB2-27-1

Table 15. LBB2-27-1 Parts.

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 LBB Series Oven Owner’s Manual

66 Version 13

8.4. Electrical Schematics

The following pages provide electrical schematics for these LBB Series ovens:

LBB1-23A-1: Figure 27 LBB1-23B-1: Figure 28 LBB1-43A-1: Figure 29 LBB1-43B-1: Figure 30 LBB1-69A-1: Figure 31

Note that each schematic also includes wiring for the Timer (8.2.2), High Limit Alarm (8.2.4) and Recorder (8.2.5) options.

LBB1-69B-1: Figure 32 LBB2-12-1: Figure 33 LBB2-18-1: Figure 34 LBB2-27-1: Figure 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.

LBB Series Oven Owner’s Manual APPENDICES Version 13 67

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 LBB Series Oven Owner’s Manual

68 Version 13

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.

Figure 27. LBB1-23A-1 Schematic.

LBB Series Oven Owner’s Manual APPENDICES Version 13 69

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 LBB Series Oven Owner’s Manual 70 Version 13

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.

Figure 28. LBB1-23B-1 Schematic.

LBB Series Oven Owner’s Manual APPENDICES Version 13 71

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.

Figure 29. LBB1-43A-1 Schematic.

APPENDICES LBB Series Oven Owner’s Manual 72 Version 13

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.

Figure 30. LBB1-43B-1 Schematic.

LBB Series Oven Owner’s Manual APPENDICES Version 13 73

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.

Figure 31. LBB1-69A-1 Schematic.

APPENDICES LBB Series Oven Owner’s Manual 74 Version 13

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.

Figure 32. LBB1-69B-1 Schematic.

LBB Series Oven Owner’s Manual APPENDICES Version 13 75

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.

Figure 33. LBB2-12-1 Schematic.

APPENDICES LBB Series Oven Owner’s Manual 76 Version 13

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.

Figure 34. LBB2-18-1 Schematic.

LBB Series Oven Owner’s Manual APPENDICES Version 13 77

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.

Figure 35. LBB2-27-1 Schematic.

APPENDICES LBB Series Oven Owner’s Manual 78 Version 13

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.

LBB Series Oven Owner’s Manual

Despatch

INDUSTRIES

Version 13 79

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.