American Dryer Corp. AD-400 User Manual
Page 41
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
is heated by the pilot flame. The pilot flame should be about the size of a tennis ball and should
heat the flame rod so it is red hot.
c. Burner Fan System
The burner fan provides additional combustion air for proper gas combustion. The fan provides
approximately 400 cfm of air to the gas burner box. This airflow is obtained when the air pressure as
measured at flie air pressure tap on the gas burner box is approximately 1J25 inches water colunm (3.1
millibar). The combustion air system is comprised of the following components.
• Burner Fan Air Switch
The differential air pressure is measured by the burner fan air switch, which is located next to the burner
fan motor. If the combustion air is inadequate, this switch will prevent ignition. The setting of this
switch is adjustable, and it should be set at 1 inch water colunrm (2.5 millibar).
'....
39