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• BURNER DOOR SWITCHES DS4B-DS5B (Interlock 2)
These switches are located on the burner doors, and are utilized to verify that they are closed. Their
signals are terminated in the Solenoid Junction Box and then fed to the Main Electrical Enclosure.
• LOAD DOOR SWITCH DS1B
These switches are located on the left center of the load doors, and is used to verify that the doors are closed.
The signal from this switch goes through a disconnect plug, to allow for services of the tumbler (basket), and
terminates in the Tumbler Junction Box (TB4).
• UNLOAD DOOR SWITCH DS2-B
This switch is closed on the right center of the unload doors, and used to verify that the doors are closed.
The signal from the switch goes through a disconnect plug, to allow for service of the tumbler (basket),
and terminates in the Tumbler Junction Box (TB4).
• BURNER FAN AIR PRESSURE SWITCH PRS4
This adjustable switch is located centrally in the burner section of the dryer. Its function is to monitor
the Burner Fan Air Pressure, and signal the burner Controller Module Pin #6. This switch is terminated
in the Solenoid Junction Box (TB2).
The following devices are used as a safety interlock to the Burner Controller. The devices have to be
satisfied prior to burner ignition. The signal that flows through these devices terminate at Pin #7 on the
Burner Controller.
• GAS HI PRESSURE and GAS LO PRESSURE SWITCH PRS1 & PRS2
These switches are housed in one enclosure, and are located in the left-center of the Burner Section.
Their function is to monitor both HI and Lo gas pressure, and prevent ignition if the pressures do not fall
in the correct range. The signals from these switches are terminated in Solenoid Junction Box, and
transferred to the Main Electrical Enclosure.
• LINT CHAMBER AIR PRESSURE SWITCH PRS3
This switch, located at the rear left of the Base Section, is used to monitor the pressure of the Lint Screen
Area. If this pressure is too low, caused by excessive lint or a defective switch the burner will not be
allowed to ignite. The signal for this switch is terminated in the Base Junction Box, and transferred to the
Main Electrical Enclosure.
• SIX (6) CHANNEL HIGH TEMPERATURE LIMITS SWITCH
This switch is located centrally on the Main Electrical Enclosure Panel and are used to shut down the
burner in the event that a particular temperature has risen to level beyond the normal operating temperature
of the dryer.