VHX SERIES STEAMERS - OPERATION
STEAMER OPERATION
CABINET BASE BOILER
Ensure that all utility connections to the steamer have been made and are turned ON and that the knob on the main gas valve is in the ON position.
The VHX Series steamers are
1.Turn power switch ON.
A.Amber colored lights on the boiler control panel for High Pressure and Low Water level will illuminate. and stay on until the boiler is full and the reset switch is pressed.
B.Water will begin filling the boiler and the blowdown solenoid valve will close. The boiler should fill, in four to eleven minutes.
C.As water fills the boiler, observe water level gauge glass to verify that water is in boiler. See "WATER LEVEL GAUGE ASSEMBLY" in "COMPONENT FUNCTION” and COMPONENT LOCATION “ under "REMOVAL AND REPLACEMENT OF PARTS".
D.Once the water in the boiler reaches the minimum level, the green ready light on the boiler control panel will illuminate.
NOTE: If the fill has stopped, one visible inch of water should be in the gauge glass.
2.Press the reset switch on the boiler control panel.
A.Low water level safety circuit will be reset and the Low Water level light (amber) will turn off.
B.High pressure safety circuit will be reset and the High Pressure light (amber) will turn off.
C.Sparking will begin three seconds later to light the pilot burner.
1)If the pilot burner lights, a signal is sent back through the ignition cable indicating the presence of pilot burner flame and sparking stops.
2)If pilot burner flame is not established immediately, sparking will continue for 90 seconds. After that duration, the ignition control module will lock out and needs to be reset to start the pilot and main burner lighting cycle again.
New Style Controls - Power to the Pilot gas valve operates on a "timer" circuit allowing gas flow to the pilot for approximately 15 seconds, during ignition trial, then turns off.
D.Main gas valve opens, burner ignites and begins to heat the water in the boiler. After approximately 15 minutes, steam should be present for cooking product. Observe that the boiler pressure gauge indicates a steam pressure of
3.The cycling pressure switch will maintain steam pressure in the boiler by cycling the main burner ON and OFF.
COOKING COMPARTMENT
CONTROLS
When the steam pressure in the cooking compartment manifold reaches approximately 3 psi, the cooking compartment pressure switch closes, suppling power to the other cooking compartment controls. The ready lights will illuminate and after approximately one minute, the steam pressure in the boiler will reach the upper limit of 10 psi. If the pressure drops below approximately 3 psi, the pressure switch will open, removing power from the controls.
NOTE: On initial startup, if a cooking timer is set immediately after the ready light comes on, steam solenoid chattering will be heard (oil canning) and the ready lights will flash for several seconds. This condition is caused by the manifold steam pressure being on the “fringe” of the pressure switch set point. When a cook timer is set, the compartment steam solenoid valve opens causing the manifold steam pressure to drop, slightly below the pressure switch set point. At the same time, steam pressure is still increasing in the boiler. This opposing condition causes a pressure “bounce” to occur. After the steam pressure passes approximately 4 psi this condition subsides. During normal operation, this condition will not be seen.
F24700 (October 2001) |
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