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Despatch LBB Series - User Manual

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LBB Series Oven Owner’s Manual ABOUT THIS MANUAL
Version 13 1
Copyright © 2011 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 12
10/2008
LBB SERIES OVEN
OWNER’S MANUAL
C-188
PN 146230
VERSION 13
9/2011

Table of Contents

Questions and Answers

  • M
    michaelwheelerAug 19, 2025
    Why Despatch LBB is not heating up to set temperature?
    • W
      William GilbertAug 19, 2025
      If your Despatch Oven isn't reaching the set temperature, it could be due to several reasons. First, check the power source and fuses for both the oven and the wall. A burned-out heater element could also be the cause, requiring a replacement. Another possibility is a control instrument malfunction; check the control parameters and replace the controller if the OUT LED doesn't turn on. Lastly, loose wire connections behind the control panel (after disconnecting power) can also lead to this issue.
  • M
    Mr. Adrian PerezAug 21, 2025
    What to do if Despatch LBB Oven temperature is inaccurate?
    • M
      Mrs. Mary HowardAug 21, 2025
      If you find that your Despatch Oven displays an inaccurate temperature, the control instrument may be miscalibrated. To resolve this, check the control parameters and recalibrate the control instrument.
  • A
    Anne JenkinsAug 23, 2025
    Why is my Despatch LBB heating up so slowly?
    • L
      Lisa PaulAug 23, 2025
      A slow heat-up in your Despatch Oven can stem from several factors. An improperly loaded workload, where the load is too large or poorly distributed, can hinder heating. Low line voltage, potentially due to insufficient power or circuit overload, may also be the cause. Check if one or two heating elements have burned out and replace them as needed, verifying heater amperage on the nameplate. Ensure the vent isn't wide open, and consider the possibility of a fan motor failure, which would require replacement.
  • G
    gwalkerAug 26, 2025
    What causes frequent heater element burnout in Despatch LBB Oven?
    • J
      juliagatesAug 26, 2025
      Frequent heater element burnout in your Despatch Oven can be attributed to several causes. Harmful fumes generated by the load can damage the elements, so increasing vent opening or discontinuing the process may help. Spillage or splattering of material on the heater elements can also lead to burnout; disconnect power and clean the oven chamber and elements. Overheating, potentially due to issues with the Control and Hi-Limit instruments, and fan motor failure can also contribute to this problem.
  • K
    Kathleen GallagherAug 28, 2025
    How to fix excessive vibration in Despatch LBB Oven?
    • T
      Tammy RomeroAug 28, 2025
      Excessive vibration in your Despatch Oven can often be traced to a dirty or unbalanced fan wheel. Try cleaning the fan first. If the problem persists, consider replacing the fan wheel.
  • D
    Daniel WongAug 30, 2025
    What to do if Despatch Oven door will not stay closed?
    • R
      Renee SmithAug 30, 2025
      If the door of your Despatch Oven won't stay closed, it's likely due to inadequate latch tension. Ensure that the latch strike is contacting the center of the latch and adjust the mounting angle to center as required. Increase latch tension by turning the screws on the end of the latch clockwise, making even adjustments on all four screws to maintain even door pull.
  • B
    Becky PerezSep 1, 2025
    Why Despatch Oven has erratic temperature?
    • J
      James GarciaSep 2, 2025
      Erratic temperature in your Despatch Oven is often due to a control instrument malfunction. Before replacing the control instrument, check the control parameters.
  • M
    Marcus RiggsSep 4, 2025
    How to troubleshoot improper airflow in Despatch LBB Oven?
    • P
      Patricia RyanSep 4, 2025
      Improper airflow in your Despatch Oven can stem from a fan motor failure, which requires replacing the fan motor. Alternatively, an unbalanced fan wheel can cause this issue. Reposition the fan wheel within 3/10” from the top of the housing or replace the fan wheel.
  • K
    Kenneth WoodsSep 6, 2025
    What causes excessive surface temperature on Despatch LBB Oven?
    • B
      Brianna MurphySep 6, 2025
      Excessive surface or door temperature on your Despatch Oven can be caused by door seal deterioration, which requires replacing the door seal. It can also happen if the door is closed into the top or bottom latch only. See specific difficulty below for this problem.
  • S
    Sue LongSep 8, 2025
    How to fix Despatch Oven door closing into only one latch?
    • H
      Hailey WhitakerSep 8, 2025
      If your Despatch Oven door closes into only the top or bottom latch, it's likely due to uneven latch tension adjustment. Ensure that the latch strike is contacting the center of the latch, adjusting the mounting angle as required. Adjust the door for even top and bottom latch tension by turning the screws on the ends of the latch. Clockwise increases tension, while counterclockwise decreases it.

Summary

About This Manual

Important User Information

Crucial safety advice and general usage guidelines.

Specifications

Safety

Safety Information

General safety warnings and precautions for oven operation.

Lockout Procedures

Details on lockout requirements and procedures for safe maintenance.

Maintenance

Guidelines for maintaining the oven and its components.

Electrical Power Safety

Safety precautions related to electrical power and connections.

Fire Safety

Steps to take in case of a fire and related safety warnings.

Equipment Lockout Requirements

Requirements for equipment lockout and emergency stop procedures.

Theory of Operation

Oven Theory

Control Systems

Primary Control Instrument

Details of the main microprocessor-based digital control instrument.

Hi-Limit Instrument Usage

How to use the Hi-Limit instrument for product or oven protection.

Assembly & Setup

Unpack & Inspect Oven

Oven Setup

Steps for setting up the LBB Series Oven.

Select Oven Location

Setup Procedure

Wiring & Power Connections

Instructions for proper wiring and power connections for the oven.

Operation

Load Oven

Pre-Startup Checklist

Checklist of essential checks before starting the oven.

Operating Procedure

Step-by-step guide to starting and operating the LBB Series Oven.

Control Instrument Settings

Parameter Programming Mode

Oven Zone Calibration

Set the Hi-Limit

How to adjust the setpoint for the Hi-Limit instrument.

Hi-Limit Parameter Setup

Maintenance

Maintenance Checklist

Routine Tests

Replace Control Instrument

Step-by-step guide to replacing the control instrument.

Replace Hi-Limit Instrument

Step-by-step guide to replacing the Hi-Limit instrument.

Replace Heater Unit

Step-by-step guide for replacing the heater unit.

Replace Fan Motor

Step-by-step guide for replacing the fan motor.

Troubleshooting

Heating and Temperature Issues

Addresses issues with heating performance and temperature control.

Heater Element & Airflow Problems

Control and Door Issues

Despatch LBB Series Specifications

General IconGeneral
Control Accuracy±0.5°C
InsulationHigh-density mineral wool
Data LoggingOptional
AirflowHorizontal
ApplicationLaboratory and light industrial applications
Power Supply120V / 240V, single phase
ConstructionHeavy-duty steel
Control SystemDigital
CertificationsCE, UL
Cooling RateVaries by model; refer to specific model datasheet

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