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Despatch LFC1-38-8 - User Manual

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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

  • E
    Eric KennedyAug 14, 2025
    Why Despatch LFC1-38-8 is not heating up properly?
    • V
      Vanessa HurleyAug 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.
  • E
    Elizabeth GonzalezAug 17, 2025
    What to do if my Despatch LFC1-38-8 Oven heats up too slowly?
    • C
      christopher12Aug 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.
  • L
    Laura MathewsAug 21, 2025
    Why does my Despatch LFC1-38-8 Oven have erratic temperature?
    • P
      Paul MontgomeryAug 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
    Judy BakerAug 25, 2025
    What causes frequent heater element burnout in Despatch LFC1-38-8?
    • B
      boylesethAug 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.
  • C
    Chad RichardsAug 27, 2025
    Why Despatch Oven will not control at setpoint?
    • J
      James BatesAug 27, 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.
  • K
    Kristen WilliamsAug 30, 2025
    Why is the surface or door temperature of my Despatch LFC1-38-8 Oven excessive?
    • J
      joe63Aug 31, 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.
  • A
    Anna RubioSep 3, 2025
    What causes excessive vibration in my Despatch LFC1-38-8?
    • J
      Joseph RussoSep 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.
  • Z
    zlopezSep 6, 2025
    What causes improper airflow in Despatch Oven?
    • W
      Wayne SchmidtSep 6, 2025
      Improper airflow in your Despatch oven can be caused by: * Fan motor failure: Replace the fan motor. * Fan wheel seated too low on fan shaft: Adjust the fan wheel for 3/16" clearance between the wheel and inlet ring.
  • D
    David WallerSep 10, 2025
    What to do if the heater of Despatch LFC1-38-8 Oven does not shut down until it reaches the High Limit setting?
    • J
      jamesdelacruzSep 10, 2025
      If the heater in your Despatch oven continues to run until it reaches the High Limit setting, it could be due to: * Controller malfunction: Replace the controller. * SSR malfunction: Replace the SSR.

Summary

About This Manual

Important User Information

Specifications

Provides detailed technical specifications for the LAC/LFC series ovens.

Dimensions

Solvent Capabilities

Outlines the capabilities and limitations of LAC and LFC ovens regarding solvent processing.

Capacities

Power

Temperature

Specifies temperature performance metrics like heat-up time, recovery, and uniformity.

Safety

Safety Information

Crucial safety warnings and instructions to prevent injury or equipment damage.

Lockout

Details lockout/tagout procedures to ensure zero energy state before maintenance.

Lifting and Carrying Precautions

Maintenance Safety

Electrical Power Safety

Highlights dangers associated with electrical power and precautions for maintenance.

Fire Safety Procedures

Outlines steps to take in case of a fire, including power disconnection.

Equipment Lockout Requirements

Reinforces the necessity of lockout for safety during inspection or repair.

Disconnecting Devices

Explains methods for safely disconnecting power to the oven.

Airflow Switches: Recirculation and Forced Exhaust

Theory of Operation

The LAC-8 Series Oven

LFC Specific Operation

Details features and safety requirements specific to the LFC Class A oven for solvent handling.

Damper Control

The Protocol 3 Controller

Introduces the Protocol 3 controller, its dual functionality, and operating modes.

Assembly & Setup

Unpack & Inspect the LAC-8 Series Oven

Provides instructions for unpacking and inspecting the oven for shipping damage.

Handling Shipping Damage

Set-Up the LAC-8 Series Oven

Guides on selecting the location and performing the initial setup of the oven.

Select Oven Location;Operating Environment

Set-up Procedure

Details the steps involved in the physical setup and placement of the oven.

Wiring & Power Connections

Explains how to connect the oven to the electrical power supply.

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

Provides specific wiring instructions for certain LAC-8 models.

Operation

Load Oven

Pre-Startup Checklist

Lists essential checks to perform before starting the oven for safe operation.

Operating Procedure

Start Oven

Maintenance

Maintenance Checklist

Testing Airflow Switch and Purge Timer (LFC)

Explains how to test critical safety components on LFC models.

Cleaning and Decontamination

Cleaning the LAC-8 Series Oven

Decontaminating the LAC-8 Series Oven

Details safety precautions and steps for decontaminating the oven.

Routine Tests

Airflow Switch Test Operation

Checking Power, Switches, and Timer

Airflow Switch Adjustment

Summary Switch Conditions

Replace Protocol 3 Controller

Replace Heater Unit

Replace Fan Motor

Troubleshooting

Troubleshooting Symptoms

Lists common oven symptoms, their probable causes, and suggested remedies.

Troubleshooting Error Messages and Alarms

Explains common error messages and alarm conditions with their solutions.

Despatch LFC1-38-8 Specifications

General IconGeneral
BrandDespatch
ModelLFC1-38-8
CategoryOven
LanguageEnglish

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