MAINTENANCE LAC/LFC Series Oven Owner’s Manual
38 Version 1.12
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.
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.
Inspect user interface areas – Inspect door and door hardware periodically to insure safe
operation.
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.
Check that safety devices are ON and enabled.
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.
6.2. Test Airflow Switch and Purge Timer (LFC only; safety)
The LCD airflow switch recirculation fan, airflow switch exhaust fan, and purge timer should be
tested every 40 hours. To test the airflow switch and purge timer:
1. Allow the oven to stabilize at its minimum operating temperature by turning the heater off.
Place all dampers in the closed position.
2. Cycle power to the system.
3. The airflow switch should be closed, but the heater relay should remain de-energized until the
purge timer times out. This can be verified by monitoring the purge timer.
Indicators 1LED and 2LED should be lit. 3LED should remain off until the purge timer times out.
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