Vulcan-Hart VL3GMS, VL2GMS, VL3GAS Electro Mechanical Low level Cut-Off & Differential Control

Page 40

VL SERIES STEAMER - ELECTRICAL OPERATION

Electro Mechanical - Low level Cut-Off & Differential Control

The steamer is equipped with three water level sensing probes (high, low and low level cut-off), a differential level control (1G1GO) and a low level cut-off control (1D1DO). The low-level cut-off is an additional control that is identical to the differential level control but serves as the safety backup to shut off the heat source in case the water level drops below the low level cut-off (LLCO) probe. The differential level control maintains the water level between the low and high water level probes.

Each control is powered by input voltage (120VAC) on terminals 1 and 2 which also connect to the primary side of the internal transformer. The transformer secondary (300VAC) will provide power to the internal contactor coil through a series path going from one side of the secondary winding, through the contactor coil, through the water level control probe, through the water in the boiler and to the boiler for ground. The other side of the transformer secondary is attached to ground.

When the main power switch is turned ON, both water level controls are energized. The boiler fill solenoid is then energized through the normally closed contacts (terminals 3 & 4) on the differential level control and water begins filling the boiler.

When the water level reaches the low level cut-off (LLCO) probe, the internal contactor coil on the low water level control is energized. With the contacts on terminals 7 & 8 now closed, the heat source is then energized. The internal contactor coil will remain energized until the water level in the boiler drops below the LLCO probe.

When the water level reaches the low level (LL) probe, power to terminal 7 on the differential level control will be present but no switching occurs.

After the water level reaches the high level (HL) probe, the differential control contactor coil is energized and the normally closed contacts on terminals 3 & 4 open, which de-energizes the boiler fill solenoid and stops the flow of water into the boiler. The internal contactor coil will have a locking path through contacts 7 & 8 to the low level probe to keep the coil energized after the water level drops below the high level probe.

When the water level drops below the low level (LL) probe, the internal contactor coil is de-energized, returning contacts 3 & 4 back to their normally closed state and energizing the boiler fill solenoid to refill the boiler. The water level must then fill to the high level probe again, to energize the internal contactor coil. The differential control will toggle ON and OFF during a cooking cycle as needed.

Page 40 of 88

Page 39 Page 41
Image 40
Page 39 Page 41
Contents VL Boiler Base Series Convection Steamers Table of Contents VL Series Steamers Introduction Water ConditioningSpecifications ToolsGas Steamers Electric SteamersGas Powered Steam Boiler Electrically Powered Steam BoilerRegenerated Steam Powered Boiler Steamer OperationDirect Steam Powered Cooker Boiler Blowdown and Steamer Shut offAutomatic blowdown Manual blowdownStandard Automatic Prevent Water Level Gauge Assembly Cycling Pressure SwitchHigh Limit Pressure Switch Power SwitchHandhole Cover Assembly Delime Port AssemblyBoiler Pressure Gauge Check ValveCompartment Power Switch Cooking TimerThermal Switch Load Compensator Cooking Light RedRemoval and Replacement of Parts VL Series Steamers Removal and Replacement of Parts Cooking Compartment Controls Component Configurations Water Level Gauge Assembly Water Level Controls LOW Level CUT OFF and DifferentialSolid State Electro MechanicalBoiler Assembly High Limit Thermostat GAS Combination Control Valve Boiler Fill and Cold Water Condenser Solenoid ValvesCompartment Gasket and Door Screw NUT, Door and Bushings GasketDoor Screw Nut Door and BushingSteam Coil Heater ContactorsHeating Elements Boiler Clean-Out All Boiler ModelsInspection Deliming Only Models with Deliming Port Assembly Solid State Low level Cut-Off & Differential Control Water Level Controls TestElectro Mechanical Low level Cut-Off & Differential Control Water Level Probes Disassembly Compartment Pressure AdjustmentFill and Cold Water Solenoid Valves Boiler not Filling with Water Boiler Blowdown Drain Solenoid ValveBoiler Slow to Pressurize Newer ModelsOlder Models All Models With BoilerInlet Water Strainer Electric ModelsDirect Steam Models Regenerated Steam Coil SteamersVL Series Steamer Service Procedures and Adjustments GAS Burners Air Shutter AdjustmentAutomatic Ignition Systems GAS Models Terminals Spark Ignition Control TestGAS Manifold Pressure Adjustment Direct Steam Models Regenerated Steam Older Models Heater ContactorsVL Series Steamer Service Procedures and Adjustments Thermal Switch Prevent Automatic Models Steam Gate Valves Electrical Operation Water Level ControlsSolid State Auxiliary Low Level Cut-Off Electro Mechanical Low level Cut-Off & Differential Control Electro Mechanical Auxiliary Low Level Cut-Off Sequence of Operation Initial Fill and PreheatVL Series Steamer Electrical Operation Cook Cycle Water Refill After Initial FillElectric Models Boiler Blowdown/drainCook Cycle Water Refill After Initial Fill Purposely Left Blank Manual Ignition, Standard Controls Electronic Ignition, Standard Controls Manual Ignition, CSD-1 Code Controls Electronic Ignition, CSD-1 Code Controls VL Series Steamer Electrical Operation Manual Ignition, Standard Controls VL Series Steamer Electrical Operation Electronic Ignition, Standard Controls VL Series Steamer Electrical Operation Manual Ignition, CSD-1 Code Controls VL Series Steamer Electrical Operation Electronic Ignition, CSD-1 Code Controls VL Series Steamer Electrical Operation Auto Blowdown, Standard Controls Auto Blowdown, Cal-Code Controls Auto Blowdown, Standard Controls contactor 1 std VL Series Steamer Electrical Operation Auto Blowdown, Standard Controls contactors 2 std VL Series Steamer Electrical Operation Manual Blowdown, Cal-Code Controls contactors 1 std aux VL Series Steamer Electrical Operation Auto Blowdown, Cal-Code Controls contactors 1 std aux VL Series Steamer Electrical Operation Auto Blowdown, Cal-Code Controls contactors 2 std aux VL Series Steamer Electrical Operation Manual Blowdown, Cal-Code Controls contactors 2 std aux VL Series Steamer Electrical Operation Standard and Cal-Code/CSD-1 Controls See Schematic and Wiring Diagrams Compartment Controls Manual Blowdown Older Models Auto Blowdown Older Models Schematic and Wiring Diagrams Compartment Controls Automatic Standard Manual Troubleshooting ALL ModelsContacts not closing to power boiler fill solenoid Schematic and Wiring Diagrams Symptom Possible Causes GAS Models onlyPilot not adjusted correctly. See Pilot

VL2GPS, VL3GPS, VL3GSS, VL2GSS, VL2GAS specifications

Vulcan-Hart is well-known in the commercial cooking equipment industry, providing durable and efficient products that cater to the needs of restaurants and foodservice operations. Their line of griddles, namely the VL3GAS, VL3GPS, VL3GMS, VL2GAS, and VL2GPS, showcases their commitment to high-quality performance and innovative cooking technologies.

The Vulcan-Hart VL3GAS is a gas griddle, featuring a robust stainless steel construction that ensures longevity and resilience in a bustling kitchen environment. It offers a smooth, hot cooking surface that allows for optimal heat retention and distribution, ensuring that food cooks evenly. With a 3/4-inch thick steel plate, it provides excellent thermal conductivity, making it ideal for high-volume cooking. This model is designed with easy-to-use controls, which makes it convenient for chefs to operate.

The VL3GPS model is a gas-powered griddle that comes equipped with a patented grease management system, which aids in maintaining a cleaner cooking environment. This system helps to separate grease from food and minimizes flare-ups, enhancing safety during cooking. Additionally, the griddle features a temperature control that allows chefs to set precise cooking temperatures, ensuring consistent results.

Moving to the VL3GMS, this model introduces increased versatility with its combination of gas and optional electric features. It’s tailored for establishments that require flexibility in their cooking strategies. The VL3GMS is also designed with a spacious cooking surface, making it suitable for preparing a wide array of dishes simultaneously.

The VL2GAS is a two-burner gas griddle that is specifically tailored for smaller kitchen operations or those with limited space. Its compact design does not compromise on performance, still providing a durable cooking surface and reliable temperature control. This model is ideal for smaller cafes or food trucks where space is at a premium.

Lastly, the VL2GPS complements the VL2GAS with its grease management system. This enhances hygiene and ensures that cooking remains efficient and safe. Both VL2 models offer easy startup and shutdown procedures, making them user-friendly for chefs working in fast-paced environments.

Overall, the Vulcan-Hart VL series griddles combine quality construction, innovative technology, and efficient design. Whether it’s the three-burner or two-burner options, these griddles meet the demands of commercial kitchens, providing reliable cooking solutions that serve the dynamic needs of the foodservice industry.
Top Page Image Contents