Reznor 113779 Control Kit

The Reznor 113779 Low Ambient Control Kit is a critical field-installed component engineered to maintain stable head pressure in Reznor HVAC equipment when operating in temperatures down to 40°F. As a veteran technician knows, low-temperature cooling demands can lead to liquid line pressure drops that starve the expansion device and compromise system efficiency. This genuine Reznor OEM part leverages a high-precision low ambient pressure switch to cycle the condenser fan, ensuring the compressor maintains its designed refrigeration cycle parameters without slugging or capacity loss.

Designed for industrial and commercial reliability, the 113779 kit includes a head pressure control switch, a wiring harness, and a Schrader depressor tee for seamless integration into existing liquid line service ports. This setup is vital for units serving spaces with high internal heat loads, such as server rooms or manufacturing floors, where year-round cooling is mandatory. Utilizing this low ambient fan control prevents large swings in condensing temperature and protects the unit heater or AC system from premature component fatigue during fluctuating secondary environmental changes.

• Maintains Head Pressure: Prevents low-pressure cut-outs by regulating fan cycles during cooling demands in cold weather.
• OEM Compatibility: Seamlessly integrates with Reznor PR, PRP, LRP, and Q-Series units as a direct replacement control module.
• System Longevity: Helps prevent compressor slugging and lubricant migration by maintaining optimal operating temperatures.
• Simplified Installation: Includes essential HVAC tools such as the Schrader tee and relay for a faster field setup.
• Enhanced Efficiency: Minimizes capacity losses in variable low ambient conditions for more consistent system performance.

• At what temperature does this kit become necessary? This technical kit is typically utilized when the outdoor ambient temperature drops below 50°F or 40°F, depending on the specific model's engineering limits.
• Are there additional parts required for full low ambient operation? Yes, most applications also require a field-supplied crankcase heater and a properly sized freezestat to ensure the compressor remains protected.
• Can this be used with heat pump applications? While compatible, the included 4-inch jumper wire is typically discarded when installing on heat pump systems; always refer to the specific wiring diagram for your model.

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.