MARS 34620 Restring Kit

When you're dealing with a burnt-out section in an electric furnace or air handler, the MARS 34620 Restring Kit provides a reliable, field-serviceable solution for 277V applications. This heavy-duty 2500W 277V Restring Kit features a high-grade Nichrome heating element coil designed for maximum thermal transfer and durability. The coil is close-wound with a 3/8-inch diameter and is engineered to be stretched to fit various lengths ranging from 27 to 78 inches, making it a versatile HVAC replacement part for strip heaters, duct heaters, and air curtains. To ensure a low-resistance connection and prevent terminal hotspots, the kit utilizes welded terminal bolts rather than mechanical crimps. Each package is a comprehensive electric furnace repair kit, including essential ceramic insulators, bushings (standard and extra-long), nuts, and washers to restore system integrity. For any veteran tech, this 2500W heating coil is the go-to for maintaining commercial and residential heating units where an OEM assembly is unavailable or cost-prohibitive.

• Universal Compatibility: Designed for use in electric furnaces, air handlers, and duct heaters requiring a 277V power supply.
• Enhanced Connectivity: Features welded terminal bolts that offer superior conductivity and resistance to vibration compared to standard crimp-on ends.
• Complete Hardware Kit: Includes multiple sizes of ceramic bushings (.375 and .450 inch) and terminal insulators to accommodate different frame mountings.
• Flexible Installation: The Nichrome coil can be stretched from 27.61" to 78.87" to match the specific dimensions of the existing heater rack.

Can this coil be used on 240V or 480V systems?
This specific kit is rated for 277V. Using it on 240V will result in a significant drop in wattage output (approximately 1875W), while using it on 480V will cause instantaneous coil failure and potential fire hazards. Always match your HVAC heating element to the nameplate voltage.

What is the best way to ensure the coil doesn't overheat during operation?
Proper coil stretch is critical. If the coil is compressed too tightly in one area, it will create a hotspot. Ensure a uniform stretch across the entire rack and verify that the blower is moving the rated CFM across the resistance heating coil to prevent high-limit tripping.

Why are the terminal bolts welded instead of crimped?
Welded terminals provide a permanent, low-resistance bond that eliminates the "arcing" often seen with older crimped connectors as they oxidize over time. This keeps the connection cool and extends the service life of the restring kit.

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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.