Despatch RFD1-42 -2E with Protocol 3 - Manual (Page 24)

M AINTENANCE RFD1-42-2E Oven Owner ’s Manual
24 Version 1
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 Despatch Industries, unless for purchaser's personal use.
6. Maintenance
Do not attempt any service on this oven before opening the main power Disconnect Switch.
Danger!
Disconnect all power sources before making repairs. Contact
with energized electrical sources may result in serious injury or
death.
6.1. Checklist

Keep equipment clean. Gradual dirt accumulation retards airflow. A dirty oven can result in
unsatisfactory operation such as unbalanced temperature in the work chamber, reduced
heating capacity, reduced production, overheated components, and the like. Keep the walls,
floor and ceiling of the oven work chamber free of dirt and dust. Floating dust or accumulated
dirt may produce unsatisfactory work results.

Keep all equipment accessible. Do not permit other materials to be stored or piled against it.

Protect controls against excessive heat—particularly controls, motors or other equipment
containing electronic components. Avoid temperatures greater than 51.5°C (125°F).

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 and make repairs immediately to avoid costly delays

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
The airflow switch 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.