13 MB 19th Jul 2013 5995373155 Frigidaire 27 Dryers Gas and ...

The gas valve has two chambers in series, both must beopened before gas will flow into the burner. The solenoidthat controls the gas flow through the first chamber hastwo coils, the booster coil and the holding coil. Thesolenoid that control the second chamber has one coil,the secondary coil.Nopen, current flows through the secondary coil openingthe second chamber allowing gas to the burner, and isignited by the heat of the igniter. When the contacts ofthe sensor are open, the parallel circuit formed by theigniter and the booster coil are in series with the secondarycoil which lowers the current flow through theigniter and booster coil. Since it takes less magneticforce to hold a solenoid open than it does to open it, thefirst solenoid remains open when the current through thebooster coil is reduced. The reduction of current flowthrough the igniter reduces heat from the igniter but thesensor contacts are held open by the heat of the burnerflame.The Cycle Signal Circuit:The other side of the holding coil, booster coil and igniterare connected to neutral through the two centrifugalswitches in the motor (that are closed when the motoris running) and the door switch. When power is appliedacross these circuits, current flows through theholding coil, but the holding coil does not have enoughmagnetic force to open the solenoid by itself. At thesame time current flows through sensor contacts providingpower to the booster coil and the igniter. When currentflows through both the holding and booster coils,the first chamber opens. The contacts of the sensor arein parallel with the secondary coil so as long as thecontacts of the sensor remain closed, current flow bypassesthe secondary coil, and gas is prevented fromflowing through the second chamber of the valve to theburner.L1The cycle signal circuit is made up of the cycle signal(buzzer), signal switch (which allows the customer toactivate and deactivate the cycle signal feature) and contactsX and H that connect the circuit to neutral. Whencontacts B to C of the timer are closed or contacts B toS of the timer are closed and the extra care switch is setto ON, line 1 is connected to one side of the cycle signal.The other side of the cycle signal is connected tothe signal switch. When signal switch is set to ON thecontacts of the switch are closed, connecting the circuitto terminal H of the timer. A Pulsar cam, located nextto the cycle signal cam and rotating at 12 revolutionsper hour, allows contacts H to X to close for 5 seconds+/-3 seconds.SensorIgniterPULSAR CAMDRIVECAMIt is necessary to raise temperature above 1100° F toignite gas. As current flows through the igniter thetemperature of igniter raises from room temperature toaround 1800° F within 30 seconds. The contacts of thesensor are heat sensitive and set to open above theignition temperature of gas. When the sensor contactsAuto Dry Knits and Delicates Cycle:The auto dry knits and delicates cycle operates thesame as the auto dry regular cycle except for the lengthof time the timer motor can run (36 minutes) and theextra care feature capability. When the extra care fea-48