Vulcan-Hart GR65F, GR45, GR85F Service Procedures and Adjustments, Control Thermostat Calibration

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GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS

SERVICE PROCEDURES AND ADJUSTMENTS

WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT / TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

CONTROL THERMOSTAT

CALIBRATION

NOTE: Check the level of shortening in fry tank before proceeding. When the oil temperature is within normal operating range (325/F - 375/F), the level must be between the MIN & MAX fill lines.

1.Place a thermocouple in the geometric center of the fry tank 1" below the oil surface.

2.Set control thermostat to 350°F.

3.Allow the shortening temperature to stabilize (normally 3 cycles).

4.Record the temperature reading from the meter, at which the main burners turn off and turn on for at least two complete heating cycles.

5.Calculate the differential temperature by subtracting the temperature reading when the main burners turn off to the temperature reading when the main burners turn on.

[ Differential = Temp. (burners off) - Temp. (burners on) ] Example: 360/ (burners off) - 340/ (burners on) = 20/F.

The differential calculated should be less than 20/F.

A.If the differential is less than 20/F, the control thermostat is functioning properly.

B.If the differential is more than 20/F, the control thermostat is malfunctioning.

1)Install a replacement control thermostat as outlined under CONTROL THERMOSTAT in

REMOVAL AND REPLACEMENT OF PARTS.

6.Calculate the average temperature by adding the temperature reading when the main burners turn off to the temperature reading when the main burners turn on and divide this answer by 2.

[ Temp. (burners off) + Temp. (burners on) ] ÷ 2 =

Average Temp.

Example: 360/ + 340/ ÷ 2 = 350/F.

The average temperature should be 350°F (± 10°F).

A.If the average temperature reading is within tolerance, the control thermostat is properly calibrated.

B.If the average temperature reading is out of tolerance, continue with procedure.

7.To adjust:

A.Remove control thermostat knob.

B.Hold control thermostat shaft and turn the inner set screw clockwise to decrease temperature or counterclockwise to increase temperature (1/4 turn = 18/F).

C.Replace control thermostat knob and repeat step 6 for up to three attempts. Allow the main burners to cycle at least two times between adjustments before performing the calculation.

1)When calibration is successful, remove control thermostat knob and apply a non-permanent adhesive material to set screw head to secure from rotation.

2)Replace control thermostat knob.

8.If the above adjustment cannot be obtained, install a replacement control thermostat as outlined under CONTROL THERMOSTAT in

REMOVAL AND REPLACEMENT OF PARTS.

F25125 (March 2003)

 

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Contents GR Series GAS Fryers with Millivolt Controls ModelTable of Contents Introduction Single Floor Model or Battery Fryers Model Designations Models and FeaturesGeneral Kleenscreen Filtering System Removal and Replacement of Parts SpecificationsTools Front Panel DoorControl Thermostat High Limit ThermostatMain Burners Main Burner Orifice GAS Combination ValvePilot Burner ThermopileFRY Tank Assembly High Limit ThermostatFilter Valve and Discard Valve Switches Pump and MotorService Procedures and Adjustments Control Thermostat CalibrationGAS Manifold Pressure Adjustment Pilot Burner Flame AdjustmentMillivolt Controls Test Electrical Operation Component FunctionFryer Controls Kleenscreen Filter ControlsComponent Location Sequence of Operation Millivolt ControlsKleenscreen Filtering System Schematic Diagram Wiring Diagrams Junction Box, Kleenscreen Filtering System Frymate Dump Station Troubleshooting Symptoms Possible CausesALL Models Symptom Possible Causes Frymate Dump Station With Optional HeaterCondensed Spare Parts List Kleenscreen FilterGR Series GAS Fryers with Millivolt Control

GR85, GR35, GR25, GR45F, GR35F specifications

Vulcan-Hart, a leader in the commercial kitchen equipment industry, offers an impressive lineup of gas griddles that cater to the diverse needs of foodservice operations. Among their most renowned models are the GR45, GR65, GR85F, GR65F, and GR35F, each characterized by its durability, efficiency, and innovative features.

The Vulcan-Hart GR45 is a compact yet powerful gas griddle designed for operations with limited space. It features a 45-inch cooking surface, made from polished steel that provides even heat distribution for optimal cooking results. The GR45 comes equipped with a manual control thermostatic feature, which allows for precise temperature adjustments, ensuring perfect cooking for various menu items. Its stainless steel construction not only guarantees durability but also makes cleaning a breeze.

In contrast, the GR65 offers a larger cooking surface, measuring 65 inches. This model is particularly well-suited for establishments with high-volume demands. The GR65 boasts a high-efficiency burner system that maximizes heat output while minimizing gas consumption. Its smooth, durable cooking surface allows chefs to sear meats, cook pancakes, and prepare various dishes simultaneously. Moreover, the GR65F variant includes a front grease drawer, facilitating easy cleanup and maintenance.

The GR85F model takes versatility a step further, featuring an expansive 85-inch cooking area. This griddle is ideal for high-traffic restaurants and catering operations, offering ample space to handle multiple orders at once. The GR85F utilizes a powerful gas burner system that delivers consistent heat across the entire cooking surface. Its built-in grease management system helps maintain a clean cooking area, making it a favorite among busy kitchen staff.

For those in need of a smaller griddle, the GR65F and GR35F models are perfect solutions. The GR65F is similar to the GR65 but with the added convenience of a front grease drawer, while the GR35F is ideal for establishments focusing on smaller menus or limited cooking space. Both models feature reliable performance, energy efficiency, and ease of use, ensuring that operators can increase productivity while reducing operational costs.

In summary, the Vulcan-Hart GR series, including the GR45, GR65, GR85F, GR65F, and GR35F, showcases the brand's commitment to quality and innovation. Each model's main features, such as high-efficiency burners, durable cooking surfaces, and user-friendly grease management systems, cater to the ever-evolving demands of the foodservice industry. Whether for high-volume restaurants or smaller operations, Vulcan-Hart griddles deliver performance, reliability, and versatility.
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