Starting Circuit; Running Circuit; Theory Of Operation; Dx-2 Series Heaters - Re-Verber-Ray DX Troubleshooting Manual

Theory of Operation

Starting Circuit

When voltage is applied to L1 and L2, a circuit is completed from L1 via the blower motor to L2. The
blower fan is mounted in the control box and rated to supply sufficient air combustion.
Air pressure generated by the blower will cause the normally open burner pressure switch No. 1 to close.
Another circuit is completed from L1 to the hot surface ignition control and back to L2. There is a five
second delay, then the glo-bar is powered. After the glo-bar has been powered for 45 seconds, the control
causes the gas valve to open and initiates the ignition trial. Power to the glo-bar is shut off during the last
two or three seconds of the ignition trial.

Running Circuit

After ignition, the flame rod monitors the flame. As long as a flame is present, the valve is held open. If the
flame is lost, the control acts to close the valve within one second, and a new trial sequence identical to that
at start-up is initiated. If proof of flame is not established within 8.5 seconds, the unit will lock out. If
lockout occurs, the control can reset by briefly interrupting the power source.
Note: The DX-2 Series heaters have added indicator lights to assist in troubleshooting and ignition sequence.
DX/XTS Series Heaters

DX-2 Series Heaters

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