Vulcan-Hart VL3GAS, VL3GMS, VL2GMS, VL2GAS, VL2GSS, VL3GSS, VL3GPS, VL2GPS service manual Prevent

VL SERIES STEAMERS - GENERAL

4.Prevent

A.Set the timer to the desired cooking time. The timer must be set past five minutes to change the state of the timer control micro switch contacts.

B.Pull the steam control arm handle forward and lock it by pulling the handle down. This opens the steam inlet gate valve, allowing steam to enter the compartment.

C.Press the compartment power switch to supply power to the compartment controls. The prevent compartment controls feature load compensated cook times by utilizing a thermal switch. With this feature, when the compartment temperature reaches 180°F (the temperature at which preheating or defrosting is complete) the red light will come on and the timer will start. For a small food load, the delay time before the timer starts might be a minute or less. For a large food load, the delay time could be four and five minutes. During preheat, the steam exhaust solenoid valve (N.O.) is open to allow the full free venting of cooler air and condensate from the compartment. When the temperature reaches 180°F, the exhaust solenoid valve is energized and closes. The compartment should then pressurize to 6 psi.

D.Approximately one minute before timer reaches zero the steam control solenoid is energized to unlatch the steam control arm. An internal spring will automatically pull the arm to the rear. This closes the steam inlet gate valve and opens the steam exhaust gate valve, allowing steam and pressure to exit the compartment. When the timer reaches "0" the red light shuts off and a buzzer sounds indicating the end of the cook cycle. Turn the compartment power switch OFF to silence the buzzer and remove power from the compartment controls.

E.Turn the screw handle on the compartment door counterclockwise until the gasket no longer seals against the compartment surface. After the remaining steam escapes, move the latch paddle to the left and open the door.

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