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Description
The Ruffneck SPST Defender Thermostat (XT-311) is a specialized, heavy-duty explosion-proof device engineered for precise and safe temperature control in demanding industrial environments. As part of the Defender series, the XT-311 specifically handles heating-only applications, ensuring dependable operation in locations where explosive gases or dusts are present. Its robust construction and reliable performance make it an essential component for maintaining stable temperatures in critical industrial settings.
KEY FEATURES AND BENEFITS:
- Explosion-Proof Design: Certified for safe operation in hazardous locations (Class I, Division 1 & 2, Groups C & D; Class II, Division 1, Groups E, F, & G; Class II, Division 2, Groups F & G; Class III; Class I, Zones 1 & 2, Groups IIA & IIB), protecting against potential ignition in explosive atmospheres.
- Heavy-Duty Construction: Features an all-aluminum exterior with no breakable external plastic parts, ensuring high resistance to physical impact and harsh industrial conditions.
- Corrosion Resistance: Built without exposed copper or brass and designed to withstand corrosive elements, including H2S (hydrogen sulfide), for extended longevity in challenging environments.
- Compact and Lightweight: Its optimized size and weight facilitate easier installation and handling within constrained industrial spaces, reducing setup time and effort.
- Reliable Temperature Sensing: Utilizes a bimetal sensing element for fast-acting and accurate temperature regulation, unaffected by altitude changes and ensuring consistent environmental control.
- Environmentally Responsible: Constructed to be CFC and mercury-free, aligning with environmental safety standards and requiring no leveling during installation, simplifying deployment.
- Heating-Only Application: Specifically designed as a Single Pole, Single Throw (SPST) thermostat for efficient and dedicated temperature control in heating systems.
SPECIFICATIONS:
- Temperature Range: 36°F to 82°F (2°C to 28°C)
- Temperature Differential: 2.5°F (1.5°C)
- Max Voltage: 480 VAC
- Amps (Resistive): 22 Amps
- Horsepower (HP): ½ HP @ 125 Vac, 1 HP @ 250 Vac
- Switching: Snap acting
- Conduit Opening: ¾" - 14 NPT
- Weight: 2.1 lbs (0.95 kg)
- Warranty: 3-year
HOW TO USE:
- Ensure Power is Off: Before any installation or adjustment, ensure that the power supply to the heating system and the thermostat is completely disconnected at the circuit breaker.
- Mount the Thermostat: Securely mount the Ruffneck XT-311 thermostat in the desired location within the hazardous area, ensuring compliance with local electrical codes and safety regulations for explosion-proof equipment. Use the designated mounting points.
- Wire the Thermostat: Connect the electrical wiring to the appropriate terminals within the thermostat's enclosure. Refer to the specific wiring diagram provided with the product for correct heating-only connections (SPST configuration). Ensure all connections are secure and properly sealed to maintain the explosion-proof integrity.
- Set Desired Temperature: Once wired and the enclosure is sealed, power can be restored. Use the temperature adjustment dial on the thermostat to select the desired operating temperature for your heating system within the specified range (36°F to 82°F).
- Monitor Operation: Observe the heating system's performance to confirm that the thermostat is regulating the temperature effectively. Regular checks can help ensure continued safe and efficient operation.
BENEFITS OF USING RUFFNECK SPST DEFENDER THERMOSTAT (XT-311):
- Enhanced Safety: Provides critical explosion-proof protection, significantly reducing the risk of ignition in environments containing flammable gases, vapors, or combustible dusts.
- Consistent Temperature Regulation: Delivers precise and stable temperature control, which is essential for maintaining optimal process conditions or comfortable environments in industrial settings.
- Reduced Maintenance: Its robust construction and absence of delicate parts contribute to long-term, trouble-free operation, minimizing the need for frequent repairs or replacements.
- Operational Reliability: Designed for continuous and dependable service, even in the most challenging and corrosive industrial atmospheres, ensuring uninterrupted control of heating systems.
- Code Compliance: Meets stringent safety standards and certifications for hazardous locations, helping facilities comply with regulatory requirements and avoid penalties.
FEATURES:
- All-aluminum external construction for superior protection.
- No exposed copper or brass components.
- Resistant to corrosion, including hydrogen sulfide (H2S).
- Precision die-cast manufacturing for consistent quality.
- Compact physical footprint for versatile installation.
- Lightweight design assists in ease of handling.
- CFC and mercury-free composition.
- No leveling required during installation.
- Features a responsive bimetal sensing element.
- Sensing element performance is independent of altitude.
- Snap-acting switch mechanism for reliable operation.
- Equipped with a ¾" - 14 NPT conduit opening.
- Integral thermometer on the round cover.
- Backed by a 3-year manufacturer's warranty.
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