Despatch LAC 2-12-8 User Manual

56 pages

To Next Page

To Next Page

Page #1 background image

Loading...

Page #1 background image

LAC/LFC Series Oven Owner’s Manual PREFACE

Version 1.12 1

Copyright © 2018 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 Despatch Industries, unless for purchaser's personal use.

ULTRAFLEX DRYING AND FIRING

FURNACE

MODELS 1000, 3615, 3630, 3640

OWNERS MANUAL

C-204

VERSION 1

10/2008

LAC/LFC SERIES OVEN WITH

PROTOCOL 3™ CONTROLLER

OWNER’S MANUAL

C-266

PN 337069

VERSION 1.12

05/2018

Table of Contents

Questions and Answers:

D
David PowellAug 14, 2025
Why Despatch Oven is not heating up properly?
- D
  Diana HernandezAug 14, 2025
  There are several reasons why your Despatch oven might not be heating correctly. It could be due to: * No power: Check the power source and fuses. * A broken or frayed cord: Replace the cord. * A burned-out heater: Replace the heater. * A malfunctioning controller: Replace the controller. * Loose wire connections: Disconnect the power and check the connections behind the control panel. * Heater relay failure: Replace the circuit board or SCR. * Airflow switch malfunction: Refer to Section 6.5.1 * Door switch failure: Replace the door switch.
J
John LeeAug 17, 2025
What to do if my Despatch Oven heats up too slowly?
- J
  Joseph HuffmanAug 17, 2025
  If your Despatch oven is heating up slowly, it could be due to several factors: * The oven is improperly loaded. Try reducing the load or redistributing it within the chamber. * There is low line voltage. Ensure sufficient power and proper connections, and check for circuit overload. * Heating elements are burned out. Replace any burned-out elements. * A 240-volt oven is connected to a 208V line. Raise the line voltage to 240 volts or modify the oven for 208V operation (consult factory). * Fan motor failure. Replace the fan motor.
V
victor29Aug 20, 2025
Why does my Despatch LAC 2-12-8 have erratic temperature?
- J
  James WhiteAug 21, 2025
  Erratic or inaccurate temperature in your Despatch oven can be caused by: * A malfunctioning controller. Replace the controller. * Improper tuning parameters. Check the tuning parameters. * Controller miscalibration. Recalibrate the controller (See Protocol 3 Owner’s Manual, sections on Calibration). * High Limit setting. The High Limit should be 10-25°C higher than the setpoint. * Improper offset. Check zone calibration.
J
John DanielsAug 25, 2025
What causes frequent heater element burnout in Despatch LAC 2-12-8?
- S
  Samuel SmithAug 25, 2025
  Frequent heater element burnout in your Despatch oven can be attributed to: * Harmful fumes generated by the load. Increase vent opening or discontinue the process. * Splattering of material on heater elements. Disconnect power and clean the oven chamber and elements. * Overheating oven. Check the High Limit. * Fan motor failure. Replace the fan motor.
A
Allison MillsAug 27, 2025
Why Despatch LAC 2-12-8 will not control at setpoint?
- M
  mark55Aug 28, 2025
  If your Despatch oven isn't controlling at the setpoint, consider these potential causes: * High Limit set too low: Set the High Limit higher. * Controller malfunction: Check controller settings or replace the controller. * SSR malfunction: Replace the SSR and/or check control output voltage. * Air friction of recirculation fan: Open fresh air or exhaust air vent. Note that the unit will not control below the minimum operating temperature with the vent closed.
L
Lauren MoranAug 30, 2025
Why is the surface or door temperature of my Despatch LAC 2-12-8 excessive?
- K
  Katherine ChenAug 30, 2025
  Excessive surface or door temperature on your Despatch oven may be due to: * Door seal deterioration: Replace the door seal. * Oven over pressurization: Close the fresh air damper or, on LFC, open the exhaust damper.
S
Sean MendozaSep 3, 2025
What causes excessive vibration in my Despatch LAC 2-12-8 Oven?
- S
  seth02Sep 3, 2025
  Excessive vibration in your Despatch oven can be caused by: * A dirty fan wheel: Clean the fan. * An unbalanced fan wheel: Replace the fan wheel.

Despatch LAC 2-12-8 Specifications

General

Brand	Despatch
Model	LAC 2-12-8
Category	Oven
Language	English

Summary

Specifications

Dimensions

Physical measurements and overall size details for different oven models.

Capacities

Power

Temperature

Safety

Safety Information

Critical warnings and precautions for operating and maintaining the oven.

Lockout

Procedures for ensuring zero energy state before maintenance or repair.

Maintenance

Electrical Power

Equipment Lockout Requirements

Disconnecting Devices

Airflow Switches: Recirculation and Forced Exhaust

Damper Control

Damper Full Closed Position

Damper Full Open Position

The Protocol 3 Controller

Assembly & Setup

Unpack & Inspect the LAC-8 Series Oven

Set-Up the LAC-8 Series Oven

Wiring & Power Connections

Wire LAC-8 Models 2-12 and 2-18

Operation

Load Oven

Pre-Startup Checklist

Operating Procedure

Start Oven

Maintenance

Checklist

Test Airflow Switch and Purge Timer (LFC only; safety)

Cleaning and Decontamination

Cleaning the LAC-8 Series Oven

Routine Tests

Recirculation and Exhaust Airflow Switch Test Operation

Detailed steps for testing airflow switches crucial for heater operation.

Recirculation And Exhaust Airflow Switch Adjustment

Replacement Parts

Replace the Protocol 3 Controller

Replace Heater Unit

Replace Fan Motor

Troubleshooting

Troubleshooting Symptoms

Common oven issues, their probable causes, and suggested solutions.

Troubleshooting Error Messages and Alarms

Optional High Limit Alarm with Alarm Silence

Related product manuals

Despatch LAC 2-18-8

Despatch LAC Series

Preview: Despatch LAC-6 Series

Despatch LAC-6 Series

Preview: Despatch LBB 1-23

Despatch LBB 1-23

Despatch LBB 2-12

Despatch LBB 2-18

Despatch LBB 2-27

Despatch LBB Series

Despatch LCC Series