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Produttore : Antunes, AJ
File Size : 1.27 mb
File Nome : 1010745.pdf
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Facilità d'uso
to clear/reset this record, press both the uP and DOWN arrow buttons simultaneously (before turning the unit Off) and the display will show 33°f - indicating that record has been cleared - and then turn the unit Off. P/N 1010745 Rev. g 03/06 17 Variety Steamer maIntenance (continued) technical theory of Operation When the Rocker switch (power On/Off) is ON, line voltage flows to the primary side of the step down transformer. the transformer’s secondary side supplies 12 and 24 Vac to the control board. Once powered, and provided that the generator’s temperature is below the setpoint temperature, the control board calls for heat by supplying 3 to 5 VDc to the solid state Relay terminals 3 (+) 4 (-). Once powered, the solid state Relay then closes terminals 1 and 2, which allows line voltage to flow to the generator. as the generator begins to heat up, a type “K” thermocouple monitors the internal generator temperature. as the heat continues to increase, so does the thermocouple’s Dc millivolts. Once the generator’s temperature approaches the set- point temperature, the control board begins to pulse the VDc to the solid state Relay. the generator’s Vac and aMPs will also pulse during this point. When the generator’s temperature is between the recommended setpoints of 375 - 400° f (190 - 204° c), the thermocouple generates approximately 7.5 - 8.5 Dc millivolts. the control board receives these millivolts and proceeds to remove the 3-5 VDc to the solid state Relay since the heating circuit has now become satisfied. then, the solid state Relay terminals 1 and 2 open up, and the generator stops heating. the heating circuit cycles on and off as needed, even at idle. When the single shot button is pushed, it signals the control board to initiate a single shot of steam. the control board then supplies 24 Vac to the solenoid Valve for a split second. the solenoid Valve opens and allows approximately 3/4 - 1 ounce (4 to 5 tablespoons) of water to be disbursed onto the generator surface for steaming. the water is immediately converted into steam, which is forced up through the black Manifold Orifices to steam the product within the baskets. each of the four channel buttons can be custom programmed for cycle time, time between when each steam shot occurs, and water volume used per each shot (see the Programming section of this manual). an audio signal will sound for three seconds at the end of the cycle. two safety devices are incorporated into the Vs-350: • Hi-Limit thermostat • Pressure Relief Plunger if the heating circuit continues to call for heat and the generator overheats, a manual resettable Hi-Limit thermostat will trip and open the generator circuit. if water and or steam pressure builds up beneath the black Manifold Plate (due to restricted Manifold Plate orifices), a Pressure Relief Plunger will elevate and vent the steam pressure above the manifold plate. nOte: If any of these conditions should arise, the root cause must be determined and corrected. see the maintenance section of this manual for further details. nOte: all direct water fed units require a water pressure regulator. It should be set to 20-25 psi (1.4-1.7 kg/cm2 or 138-172 kpa). failure to install a water pressure regulator will result in poor steaming and flooding of the steam generator. P/N 1010745 Rev. g 03/06 18 Variety Steamer trOUblesHOOtInG warnInG to avoid possible personal injury and/or damage to the unit, inspection, test and repair of electrical equipment should be performed by qualified service personnel. the unit should be unplugged when servicing, except when electrical tests are required. problem possible cause corrective action Rocker switch (power On/Off) is turned on but the switch indicator Light is still off and the control Panel is blank Power cord not correctly plugged in. Plug in the power cord correctly. the power cord and/or electrical plug is damaged. inspect electrical wire, plug, and receptacle. the main electrical panel circuit breaker is off or has been tripped. Reset circuit breaker. contact your maintenance person or authorized service agency if it trips again. Rocker switch is inoperable. contact your maintenance person or authorized service agency for service. the unit’s main electrical panel circuit breaker trips. Damaged receptacle, plug, or cord; a loose connection or an internal component failure. turn the unit off, allow it to cool to room temperature, and then restart the unit. Power On/Off switch and indicator are on but the display is blank. control board is inoperable. contact your maintenance person or authorized service agency for service. transformer is inoperable. Loose or burnt wiring in heating circuit. Power On/Off switch is turned on, the switch indicator light is on, the control panel display is on, but the unit is not heating up. Heat Relay is inoperable. Reset the Hi-Limit thermostat according to the Operations section of this manual. if the Hi-Limit thermostat requries continuous resetting,...