Robertshaw 4200-011 Gas Thermostat

The Robertshaw 4200-011 is a heavy-duty commercial gas thermostat engineered for high-capacity temperature regulation in demanding kitchen environments. This FDTO model features a modulating snap-acting bypass, providing precise control for deck ovens, convection ovens, and industrial baking equipment. With a temperature range of 200°F to 550°F, this control manages both the main gas supply and bypass gas with a coordinated thermostatic action. Technicians will find the 1/2" NPT inlet and outlet connections standard for most manifold configurations. The assembly includes a 48-inch capillary and a 3/16" x 14-3/4" sensing bulb, ensuring flexible placement within the heat zone. Built with heat-resistant materials, the rugged body supports a 4-way mounting position, making it a versatile gas oven thermostat replacement. It effectively handles Natural Gas and LP Gas loads, maintaining a consistent pilot and minimum flame through its accessible front-slotted adjustment keys.

Key Benefits

• Dual Valve Response: Utilizes a snap-throttle mechanism for accurate low-temperature control and high-capacity heating.
• Universal Mounting: The 4-way mounting capability allows for installation in multiple orientations without losing dial indexing.
• Broad Compatibility: Serves as a direct commercial cooking control for major brands including Blodgett, Garland, and Vulcan.
• Field Serviceability: Accessible pilot and bypass adjustment keys allow for immediate calibration from the front of the unit.
• Durable Sensing: Features a high-quality nickel-plated copper capillary for superior thermal response and corrosion resistance.

Common Questions

How do I adjust the bypass flame on the Robertshaw 4200-011?
The bypass adjustment key is located on the front of the control housing. Using a flat-head screwdriver, you can rotate the slotted key to set the minimum burner flame when the thermostat is satisfied, ensuring the oven remains at the low-end setpoint.

Can this thermostat be used for both Natural Gas and Propane?
Yes, the Robertshaw 4200 series is designed for high-capacity gas systems and is compatible with both Natural Gas (rated at 100,000 BTU/HR) and L.P. gas, provided the appropriate orifices and regulators are installed elsewhere in the system.

What should I do if the bulb or capillary is kinked during installation?
If the 48" capillary is crimped or sharply kinked, the internal fluid path is blocked, rendering the thermostat inaccurate or inoperative. The assembly must be replaced, as these components are sensitive to pressure changes and cannot be repaired once the capillary integrity is compromised.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.