©2021 ITW EAE. All rights reserved. Despatch is a registered trademark in the U.S. and other
countries. No part of the contents of this manual may be reproduced, copied or transmitted in any form
or by any means without the written permission from ITW EAE - Despatch, unless for purchaser's
personal use.
Hi Limit Controls
ITW EAE – Despatch Recommends
A Hi-Limit control for ALL Ovens and Furnaces
A HI-LIMIT CONTROL IS INCLUDED ON THIS EQUIPMENT.
IT IS INSTALLED TO PROTECT THE EQUIPMENT.
The location of the Hi-Limit Sensor is at the supply duct louver and has been
chosen to supervise that temperature. The Hi-Limit controller should be set to
approximately 5⁰C to 10⁰C (9⁰F to 18⁰F) higher than the maximum operating
temperature. This setting will eliminate nuisance shutdowns when operating at
the maximum temperature of the equipment and still give maximum protection
to the equipment.
ITW EAE CANNOT BE RESPONSIBLE FOR EITHER THE PROCESS
OR QUALITY OF THE PRODUCT BEING PROCESSED.
If the product on which the equipment is being used is critical of over
temperature, the Hi-Limit may be used as a “Process Hi-Limit”. The sensor
element is located on the supply duct where the hot air enters the work chamber.
The temperature setting on the “Process Hi-Limit” should be set somewhat below
the temperature at which the product would be damaged. If the product has an
ignition temperature at which it would ignite, the setting should be well below
this temperature. It is recommended that a certified instrument be used to make
proper setting.
IT IS THE PURCHASER’S RESPONSIBILITY THAT THE “EQUIPMENT” HI-
LIMIT AND/OR THE “PROCESS” HI-LIMIT BE SET PER THE
INSTRUCTIONS ON THIS SHEET AND ALSO THE INSTRUCTION SHEET
FOR THE PARTICULAR HI-LIMIT INSTRUMENT FURNISHED WITH THIS
EQUIPMENT.
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