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LAC2-12-7
User Manual
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Despatch LAC2-12-7 User Manual

LAC Series Oven Owner’s Manual PREFACE
C-204 VERSION 1
10/2008
LAC-7 SERIES OVEN WITH
PROTOCOL 3™ CONTROLLER OWNER’S MANUAL
C-242 PN 320126 VERSION 1 6/2012
Version 1 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.
Copyright © 2012 by Despatch Industries.
PREFACE LAC Series Oven Owner’s Manual
Revision
Date
Author
Description
1
6/2012
Livingston
Update to LAC-7 version from LAC-6 (Version
10). Update to Protocol 3.
2 Version 1
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual PREFACE Version 1 3
Table of Contents
1. About This Manual ............................................................................................................. 6
1.1. Important User Information ..................................................................................... 6
1.2. Manufacturer & Service .......................................................................................... 7
1.3. Organization of this Manual .................................................................................... 7
1.4. Conventions ............................................................................................................. 8
1.5. Specifications .......................................................................................................... 9
1.5.1. Dimensions .......................................................................................................... 9
1.5.2. Capacities .......................................................................................................... 10
1.5.3. Power ................................................................................................................. 11
1.5.4. Temperature ....................................................................................................... 12
1.5.5. LAC-7 Series Oven Operating Conditions ........................................................ 12
2. Safety ................................................................................................................................ 13
2.1. Safety Information ................................................................................................. 13
2.1.1. Lockout .............................................................................................................. 13
2.1.1.1. Lockout Requirements ................................................................................... 13
2.1.1.2. Lockout Procedure ......................................................................................... 13
2.1.2. Door and Panel .................................................................................................. 14
2.2. Provisions for Lifting and Carrying....................................................................... 14
2.3. Maintenance .......................................................................................................... 15
2.4. Electrical Power ..................................................................................................... 15
2.5. Fire ......................................................................................................................... 16
2.6. Equipment Lockout Requirements ........................................................................ 16
2.6.1. Emergency Stop ................................................................................................. 16
2.7. Disconnecting Devices .......................................................................................... 16
2.7.1. Power Requirements .......................................................................................... 16
2.7.2. Disconnecting Hard-Wired Units ...................................................................... 16
2.7.3. Disconnecting Corded Units .............................................................................. 17
2.7.4. Disconnecting Units with Optional Disconnect Switch .................................... 17
3. Theory of Operation ......................................................................................................... 18
3.1. The LAC-7 Series Oven ........................................................................................ 18
3.2. Damper Control ..................................................................................................... 19
3.2.1. Determining Damper Settings ........................................................................... 19
3.2.1.1. Damper Full Closed Position ......................................................................... 19
3.2.1.2. Damper Full Open Position ........................................................................... 19
3.2.1.3. Other Damper Settings .................................................................................. 20
3.3. The Protocol 3 Controller ...................................................................................... 20
4. Assembly & Setup ............................................................................................................ 22
4.1. Unpack & Inspect the LAC-7 Series Oven ........................................................... 22
4.1.1. If Damaged During Shipping ............................................................................ 23
4.2. Set-Up the LAC-7 Series Oven ............................................................................. 23
4.2.1. Select Oven Location/Operating Environment .................................................. 23
4.2.2. Set-up Procedure ............................................................................................... 23
4.2.3. Wiring & Power Connections ........................................................................... 24
4.2.3.1. Wire LAC-7 Models 2-12 and 2-18 .............................................................. 25
5. Operation .......................................................................................................................... 28
5.1. Load Oven ............................................................................................................. 28
5.2. Pre-Startup Checklist ............................................................................................. 29
5.3. Operating Procedure .............................................................................................. 29
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
Copyright © 2012 by Despatch Industries.
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.
PREFACE LAC Series Oven Owner’s Manual 4 Version 1
5.3.1. Start Oven .......................................................................................................... 30
5.3.2. Working with Protocol 3 Operating Modes ...................................................... 30
6. Maintenance ..................................................................................................................... 31
6.1. Checklist ................................................................................................................ 31
6.2. Lubrication ............................................................................................................ 32
6.3. Cleaning and Decontamination ............................................................................. 32
6.3.1. Cleaning the LAC-7 Series Oven ...................................................................... 32
6.3.2. Decontaminating the LAC-7 Series Oven ......................................................... 33
6.4. Routine Tests ......................................................................................................... 33
6.5. Door Adjustment ................................................................................................... 34
6.6. Replacement Parts ................................................................................................. 34
6.6.1. Replace the Protocol 3 Controller ..................................................................... 34
6.6.2. Replace Heater Unit .......................................................................................... 35
6.6.3. Replace Fan Motor ............................................................................................ 36
7. Troubleshooting................................................................................................................ 38
7.1. Troubleshooting Symptoms ................................................................................... 38
7.2. Troubleshooting Error Messages and Alarms ....................................................... 40
8. Appendices ....................................................................................................................... 41
8.1. Standard Products Warranty .................................................................................. 41
8.2. LAC-7 Series Oven Options .................................................................................. 42
8.2.1. Optional MRC5000 Recorder Setup.................................................................. 42
8.2.2. Optional Pneumatic and Electronic Door Lock ................................................. 43
8.2.3. Optional Interior Light ...................................................................................... 43
8.2.4. Optional Door Interlock Switch (Controls Heater & Fan) ................................ 43
8.2.5. Optional High Limit Alarm with Alarm Silence ............................................... 43
8.2.6. Optional Forced Exhaust ................................................................................... 44
8.2.7. Optional Clean Dry Air (CDA)/Nitrogen .......................................................... 44
8.3. Electrical Schematics ............................................................................................. 44
Figures
Figure 1. Disconnect Switch.......................................................................................................... 17
Figure 2. LAC High-performance Bench-top Oven. ..................................................................... 18
Figure 3. Horizontal Airflow through the LAC Oven. .................................................................. 18
Figure 4. Damper Positions. .......................................................................................................... 19
Figure 5. Protocol 3 Controller Operator Interface. ...................................................................... 21
Figure 6. LAC2-18-7 Nameplate. .................................................................................................. 25
Figure 7. Rear Access Panel for Hard-Wired Connections. .......................................................... 26
Figure 8. Hinged Panel for Simpler Access to Power Connections. ............................................. 26
Figure 9. Power Connections at Main Circuit Board. ................................................................... 27
Figure 10. Remove Screws to Remove Floor Plate. ...................................................................... 35
Figure 11. Heater Panel and Inlet Cone. ........................................................................................ 35
Figure 12. Remove Screws to Remove Side Panels. ..................................................................... 35
Figure 13. Remove Heater Panel by Removing Screw in Front Edge of Each Panel. .................. 36
Figure 14. LAC-7 Circuit Board. .................................................................................................. 39
Figure 15. LAC1-10-7, 120V (Drawing 313904A01). .................................................................. 45
Figure 16. LAC1-38A-7, 120V (Drawing 313906A01). ............................................................... 45
Figure 17. LAC1-38B-7, 208V (Drawing 320160A01). ............................................................... 45
Figure 18. LAC1-38B-7, 240V (Drawing 320125A01). ............................................................... 45
Figure 19. LAC1-67-7, 208V (Drawing 320162A01). .................................................................. 45
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
Copyright © 2012 by Despatch Industries.
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual PREFACE Version 1 5
Figure 20. LAC1-67-7, 240V (Drawing 313907A01). .................................................................. 45
Figure 21. LAC2-12-7, 208V (Drawing 320164A01). .................................................................. 45
Figure 22. LAC2-12-7, 240V (Drawing 313908A01). .................................................................. 45
Figure 23. LAC2-18-7, 208V (Drawing 320166A01). ................................................................. 45
Figure 24. LAC2-18-7, 240V (Drawing 313905A01). .................................................................. 45
Tables
Table 1. Operating/Environmental Conditions (For indoor use). .................................................. 12
Table 2. Troubleshooting Oven Symptoms. .................................................................................. 38
Table 3. Troubleshooting with Control Panel Mounted Circuit Board. ........................................ 39
Table 4. Error Messages and Next Steps. ...................................................................................... 40
Table 5. MRC 5000 Settings. ........................................................................................................ 42
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
Copyright © 2012 by Despatch Industries.
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
ABOUT THIS MANUAL LAC Series Oven Owner’s Manual
Before operating this equipment, carefully read instruction 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 5 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.
6 Version 1
1. About This Manual
1.1. Important User Information
Copyright © 2012 by Despatch Industries.
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual ABOUT THIS MANUAL
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
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.
Version 1 7
The information in this document is not intended to cover all possible conditions and situations that might occur. The end user must exercise caution and common sense when installing or maintaining Despatch Industries products. If any questions or problems arise, call Despatch Industries at 1-888-DESPATCH or 1-952-469-5424.
1.2. Manufacturer & Service
The LAC-7 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 factory­trained 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 LAC­7 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.
Copyright © 2012 by Despatch Industries.
ABOUT THIS MANUAL LAC 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 information that describes an unsafe condition that may result in death, serious injury, or damage to the equipment.
Danger!
Danger is the signal word used to indicate a hazardous situation that, if not avoided, will result in death or severe injury.
Warning!
Warning is the signal word used to indicate a hazardous situation that, if not avoided, could result in death or severe injury.
Caution!
Caution is the signal word used to indicate a hazardous situation that, if not avoided, could result in moderate or minor injury.
Notice
Notice is the signal word used to indicate a hazardous situation that, if not avoided, could result in property damage.
This icon signifies supplemental important information.
8 Version 1
1.4. Conventions
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual ABOUT THIS MANUAL
LAC
Model
No.
Chamber Size
in (cm)
Capacity
feet
3
(liters)
Overall Size
in (cm)
Max.
Number of
Shelf
Positions
Exhaust Diameter
Located on Back
of Chamber
in (cm)
W0F* D H W D
H
1-10
13.75 (35)
12
(31)
12
(31) 1 (33)
23
(58)
19
(48)
29.5 (75)
5
1
(2.5)
1-38 A
18.75 (48)
18
(46)
19
(48)
3.7
(105)
28
(71)
25
(64)
35.5 (90)
9
2.5
(6.4)
1-38 B
18.75 (48)
18
(46)
19
(48)
3.7
(105)
28
(71)
25
(64)
35.5 (90)
9
2.5
(6.4)
1-67
23.75 (60)
20
(51)
24
(61)
6.6
(187)
36
(91)
27
(69)
40.5
(103)
11
2.5
(6.4)
2-12
23.75 (60)
24
(61)
36
(91)
12
(336)
36
(91)
31
(79)
52.5
(133)
17
2 - 2.5 (5-6.4)
2-18
35.25 (91)
24
(61)
36
(91)
18
(500)
47
(119)
29.5 (75)
52.5
(133)
17
2 - 2.5 (5-6.4)
*
The LAC-7 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.
Do not use liquids in the oven. Do not set product or liquids on top of the oven. Liquids that may spill on the oven floor or top of oven may cause considerable damage to the oven.
Version 1 9
1.5. Specifications
1.5.1. Dimensions
Allow 0.375" (0.95 cm) clearance on each side for shelf supports (3/4 in (1.9 cm) total).
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
Copyright © 2012 by Despatch Industries.
ABOUT THIS MANUAL LAC Series Oven Owner’s Manual
Contact Despatch for options available to help prevent such failures.
LAC-7 Model Number
1-10-7
1-38 A-7 & 1-
38 B-7
1-67-7
2-12-7
2-18-7
Maximum Load
Lbs (Kg)
150 (68)
175 (79)
250 (113)
300 (136)
300 (136)
Maximum Shelf Load
Lbs (Kg)
50 (23)
50 (23)
50 (23)
50 (23)
50 (23)
Exhaust
CFM
Adjustable
to 5
Adjustable
to 12
Adjustable
to 12
Adjustable
to 30
Adjustable
to 40
Recirculating Fan
CFM
150
300
300
600
600
H.P.
1/25 ¼ ¼
¼ x 2
¼ x 2
Number of Doors
1 1 1 1 2
Approx. Weight Net
Lbs
110
185
255
360
450
KG
50
84
116
163
204
Shipping Weight
Lbs
175
270
360
480
600
KG
79
123
163
218
272
10 Version 1
1.5.2. Capacities
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual ABOUT THIS MANUAL
†
‡
Model
Volts
Amps
Hertz
Phase
Heater
KW
Cord and Plug
LAC1-10-7
120
10.0
50/60 1 1
Included, 15 Amp (NEMA 5-15)
LAC1-38A-7
120
16.5
50/60
1
1.6
Included, 20 Amp (NEMA 5-20)
LAC1-38B-71F†
240
9.4
50/60 1
1.8
Included, 15 Amp (NEMA 6-15)
208
10.6
1.8
LAC1-67-7† 240
11.6
50/60
1
2.4
Included, 15 Amp (NEMA 6-15)
208
13.2
2.4
LAC2-12-7†‡
240
18.3
50/60 1
3.6
None, Hardwired. Branch circuit rated device 25A.*
208
20.6
3.6
None, Hardwired. Branch circuit rated device 30A.*
LAC2-18-7†‡
240
23.4
50/60
1
4.8
None, Hardwired. Branch circuit rated device 30A.*
208
26.5
4.8
None, Hardwired. Branch circuit rated device 35A.*
Version 1 11
1.5.3. Power
If the line voltage for your LAC-7 Series oven varies more than 10% from the oven voltage rating, electrical components such as relays and temperature controls may operate erratically. If the line voltage is lower than the oven voltage rating, heat-up time may be significantly
longer and motors may overload or run hot
If the line voltage is higher than the nameplate rating, motors may run hot and draw excessive
amperage
*The overcurrent protection means provided by the building mains supply circuit shall be a branch circuit rated protection device.
The LAC Series oven designed for 240 volts (see oven nameplate) will operate satisfactorily on a minimum of 208 Volts, but will result in 25% reduced heater output. If your power characteristic is lower, contact Despatch Industries. An option is available to regain the full heater power when operating on 208V.
The LAC 2-12 and LAC 2-18 must be hardwired to the electric supply using 10 AWG (8 AWG on LAC2-18-7 208V full power option) or larger wires suitable for at least 75 °C (167 °F).
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
Copyright © 2012 by Despatch Industries.
ABOUT THIS MANUAL LAC Series Oven Owner’s Manual
LAC-7 Model Number
1-10
1-38 A
1-38 B
1-67
2-12
2-18
Time to Temperature 40 °C – 100 °C (approximate minutes 40 °C – 200 °C with no load) 40 °C – 260 °C
8 25 40
9 32 60
6 22 36
6 20 34
6 19 31
4 17 29
Recovery Time - Door Open 100 °C One Minute (approximate 200 °C minutes with no load) 260 °C
1 3 7
1
6 14
1
4
8
1
3
5
1
6
9
1
4
8
Temperature Uniformity at 100 °C3F§ 200 °C§ 260 °C§
± 1 °C ± 2 °C
± 2.5 °C
Operating Range with 20 °C Ambient
40 °C – 260 °C
Control Stability
± 0.5 °C per 5 °C change in ambient
Repeatability
± 0.5° C
Item
Description
Operating Temperature**
18°C to 40°C (64.4°F to 104°F)
Relative Humidity
70% non‐condensing
Maximum Altitude
2,000 meters (6,600 feet)
§
**
12 Version 1
1.5.4. Temperature
1.5.5. LAC-7 Series Oven Operating Conditions
The LAC-7 Series oven is for indoor use. Table 1 provides the operating conditions.
Table 1. Operating/Environmental Conditions (For indoor use).
Figures are based on actual tests in an empty oven. Uniformity can vary slightly depending on unit and
operating conditions.
Fluctuations in temperature can occur at elevated ambient temperature values.
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual SAFETY
Carefully follow the established Lock Out Tag Out policies of your company in all cases.
Danger!
An accidental start-up, while working on the LAC-7 Series oven, can result in serious injury or death.
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 11 13
2. Safety
2.1. Safety Information
Do not work on the LAC-7 Series oven without reading and understanding this section which contains important information and warnings. Ignoring these warnings can result in death, serious injury or damage to the machine and product.
2.1.1. Lockout
Machine lockout places the LAC-7 Series oven into a zero energy state and prevents accidental machine start up. Always follow the Lockout Procedure described in this Section before cleaning, maintaining or repairing the LAC-7 Series oven. An accidental start-up, while working on the LAC-7 Series oven, can result in serious injury or death.
2.1.1.1. Lockout Requirements
1. Every power source that can energize any element of the LAC-7 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.
3. Test for power by attempting a start with the machine controls.
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.
Copyright © 2012 by Despatch Industries.
SAFETY LAC Series Oven Owner’s Manual
Caution!
Do not tilt oven while lifting. Do not lift oven using the door handle to prevent damage to the oven and/or personnel involved.
Caution!
Do not risk injury when lifting equipment. Take proper precautions when lifting, carrying or otherwise maintaining heavy items.
Notice
How to lift the different sizes of ovens:
LAC1-10: Two
people lift oven’s lower corners and place on wheeled transport pallet. Push pallet to desired site and lift oven from pallet, again lift using lower corners.
LAC1-38: Four
people lift oven’s lower corners and place on wheeled transport pallet. Push pallet to desired site and lift oven from pallet, again lift using lower corners.
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.
14 Version 1
4. Identify the Lockout Condition with a tag on the electrical disconnect and pneumatic shut off
valve.
5. When work is complete, remove all tags and restore the machine to its working state.
2.1.2. Door and Panel
The control panel on the LAC-7 Series oven protect against hazards. Operation without the control panel in place creates hazards that the control panel is intended to render safe for personnel.
2.2. Provisions for Lifting and Carrying
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual SAFETY
LAC1-67, LAC2-12
& LAC2-18: Do not lift by hand. Lift with fork lifter and transport pallet.
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.
Do not use liquids in the oven. Do not set product or liquids on top of the oven. Liquids that may spill on the oven floor or top of oven may cause considerable damage to the oven.
Contact Despatch for options available to help prevent such failures.
Version 11 15
2.3. Maintenance
Only qualified and trained personnel should perform maintenance or repair.
2.4. 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 LAC-7 Series oven are strictly forbidden. Never
modify any electrical circuits. Unauthorized modifications can impair the function and safety of the LAC-7 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.
Copyright © 2012 by Despatch Industries.
SAFETY LAC Series Oven Owner’s Manual
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.
Use a power stabilizer if voltage fluctuation is greater than ±10% nominal voltage fluctuation.
16 Version 1
2.5. Fire
Keep the LAC-7 Series oven clean and free of scrap materials, oil or solvents to prevent the possibility of fire. In the event of fire, use a fire extinguisher as follows.
1. Leave door as it is.
2. De-energize the machine immediately by turning OFF the DISCONNECT SWITCH.
3. Turn off the remote main disconnect (customer supplied disconnect).
4. Shut off fuel.
5. Call the fire department.
6. Stay away.
2.6. Equipment Lockout Requirements
To prevent injury or equipment damage during inspection or repair, the LAC-7 Series oven must be locked out.
2.6.1. Emergency Stop
When a risk of personal injury or damage to the LAC-7 Series oven exists, turn OFF the oven by removing/unplugging the cord. This shuts off all electrical power to the oven.
2.7. Disconnecting Devices
2.7.1. Power Requirements
Despatch recommends the LAC-7 have unobstructed access to a dedicated power source.
2.7.2. Disconnecting Hard-Wired Units
LAC-7 permanently-connected (hard-wired) ovens include models LAC2-12-7 and LAC2-18-7. Permanently-connected and multi-phased equipment must employ a switch or circuit-breaker as means for disconnection. For permanently-connected equipment, installation instructions must specify a switch or circuit-breaker is included during the facility oven installation for complete isolation.
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.
Copyright © 2012 by Despatch Industries.
LAC Series Oven Owner’s Manual SAFETY
Follow local codes and requirements for installing and using disconnect switches.
Danger!
Keep switch or circuit-breaker in building installation, close to the equipment, within easy reach of the operator and clearly marked.
Figure 1. Disconnect Switch.
Version 11 17
The disconnecting device must be installed in close proximity to the equipment and within easy reach of the operator. The disconnecting device must be marked as the disconnecting device for the equipment. If the unit is equipped with an ON/OFF switch, mark the ON/OFF position clearly.
2.7.3. Disconnecting Corded Units
LAC-7 cord-connected ovens include models LAC1-10-7, LAC1-38A-7, LAC1-38B-7 and LAC1-67-7. To disconnect a corded unit, unplug the cord from the power source.
2.7.4. Disconnecting Units with Optional Disconnect Switch
The LAC-7 Series oven has an optional Disconnect Switch (Figure 1). This Disconnect Switch is located on the front of the oven and connected to the load break switch behind the panel that disconnects or connects power from the main line. When a risk of personal injury or damage to the LAC-7 Series oven exists, turn off the Disconnect Switch. 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.
Copyright © 2012 by Despatch Industries.
THEORY OF OPERATION LAC Series Oven Owner’s Manual
Warning!
Do not remove the hat bracket (located in rear of oven) as it distributes exhaust air and protects the exhaust opening from being completely covered.
Fresh Air
Damper
Control
Power Switch
Controller
Figure 2. LAC High-performance Bench-top Oven.
Figure 3. Horizontal Airflow through the LAC Oven.
Exhaust Port
18 Version 1
3. Theory of Operation
3.1. The LAC-7 Series Oven
The LAC-7 high-performance bench-top oven uses digitally-controlled, horizontal recirculating airflow to ensure uniform temperatures throughout the oven for fast-processing (Figure
2). A high-volume fan circulates air through perforated, stainless steel walls to create a constant horizontal airflow across all sections of the oven (Figure 3). The result is proven reliability in demanding production and laboratory applications such as curing, drying, sterilizing, aging and other process-critical procedures.
The LAC-7 oven is especially useful for testing, preheating, sterilizing, drying, aging and curing along with other production applications. The overall result is efficient productivity under strenuous conditions. The chamber can be densely loaded without interfering with the process. Air delivery temperature is within 1°C of the number appearing on the digital display. Fresh air intake is regulated by a panel-mounted damper control, while the exhaust opening is fixed. The exhaust port, on the back of the oven, is covered by a hat bracket.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
Copyright © 2012 by Despatch Industries.
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