Despatch RFD Series User Manual
Page 34
M
AINTENANCE
RFD Oven Series Owner’s Manual
34
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
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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
OFF position
ON position
Indicator
Window
2. Allow the oven to stabilize at its minimum operating temperature by leaving the heater off.
3. Set the oven power to OFF.
4. Verify that the white line in the indicator window of the airflow switch is OFF (Figure 15).
a. If the switch remains ON, increase the airflow switch set point until the switch turns
OFF.
b. A switch setting of 0.2” WC (inches of water column) to 1.0” WC should detect a fan
malfunction.
c. If the switch does not shut off below a setting of 2” WC, the switch is defective.
d. Once the switch turns off, increase the setpoint an additional 0.2” WC.
5. Set the oven power to ON to start the exhaust fan.
6. Verify that the white line in the indicator window of the airflow switch is ON and steady
7. If the switch remains OFF, check the fan rotation direction (Section 5.3.1). If the fan rotation
is correct, decrease the airflow switch set point until the switch turns on.
Figure 15. Airflow Switch Indicator.