Lennox 34M72 Ambient Kit
For service technicians managing year-round cooling demands, the Lennox 34M72 Ambient Kit (Catalog Number LB-101123A) is a critical field-installed accessory for PSC condenser fan motor efficiency. This low ambient control kit transitions standard HFC-410A refrigerant systems into performance-ready configurations for server rooms and data centers where head pressure maintenance is non-negotiable. Engineered to prevent coil freeze-ups, the integrated low ambient pressure switch (S11) utilizes factory-set parameters—450 psig cut-in and 240 psig cut-out—to cycle the fan motor and sustain optimal liquid line pressure during low outdoor temperatures. The assembly includes a Schrader depressor tee and essential wiring components, allowing for a seamless interface with existing Lennox air conditioner units. When the job requires maintaining a high-pressure differential across expansion devices in freezing conditions, this OEM pressure-activated fan cycling kit provides the reliability seasoned contractors expect from Genuine Lennox parts.
Key Benefits for Commercial and Residential Applications- Optimized Fan Cycling: Features a non-adjustable low ambient pressure switch to regulate head pressure automatically.
- Broad Compatibility: Specifically designed for PSC (Permanent Split Capacitor) fan motors using R-410A.
- Extended Cooling Range: Ensures the outdoor unit operates efficiently in ambient temperatures down to 30°F.
- Complete Installation Package: Includes the S11 pressure switch, depressor tee with seal cap, and necessary wire nuts for field setup.
- System Protection: Reduces the risk of compressor damage and capacity loss by preventing excessive cycling in cold weather.
Does this kit require additional components for full low-ambient operation?
Yes, for complete protection, technicians must provide a properly sized freezestat (S49) and a compressor crankcase heater to ensure safe startup in cold environments.
Can this be used on systems with capillary tube metering?
No. This 34M72 low ambient kit is designed exclusively for systems utilizing expansion valve (TXV) metering devices.
What is the primary function of the S11 switch in this kit?
The switch monitors liquid line pressure to cycle the condenser fan OFF when pressure drops below 240 psig and ON when it reaches 450 psig, maintaining head pressure stability.
This item is not eligible for free shipping.
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.
Lennox 34M72 Ambient Kit
For service technicians managing year-round cooling demands, the Lennox 34M72 Ambient Kit (Catalog Number LB-101123A) is a critical field-installed accessory for PSC condenser fan motor efficiency. This low ambient control kit transitions standard HFC-410A refrigerant systems into performance-ready configurations for server rooms and data centers where head pressure maintenance is non-negotiable. Engineered to prevent coil freeze-ups, the integrated low ambient pressure switch (S11) utilizes factory-set parameters—450 psig cut-in and 240 psig cut-out—to cycle the fan motor and sustain optimal liquid line pressure during low outdoor temperatures. The assembly includes a Schrader depressor tee and essential wiring components, allowing for a seamless interface with existing Lennox air conditioner units. When the job requires maintaining a high-pressure differential across expansion devices in freezing conditions, this OEM pressure-activated fan cycling kit provides the reliability seasoned contractors expect from Genuine Lennox parts.
Key Benefits for Commercial and Residential Applications- Optimized Fan Cycling: Features a non-adjustable low ambient pressure switch to regulate head pressure automatically.
- Broad Compatibility: Specifically designed for PSC (Permanent Split Capacitor) fan motors using R-410A.
- Extended Cooling Range: Ensures the outdoor unit operates efficiently in ambient temperatures down to 30°F.
- Complete Installation Package: Includes the S11 pressure switch, depressor tee with seal cap, and necessary wire nuts for field setup.
- System Protection: Reduces the risk of compressor damage and capacity loss by preventing excessive cycling in cold weather.
Does this kit require additional components for full low-ambient operation?
Yes, for complete protection, technicians must provide a properly sized freezestat (S49) and a compressor crankcase heater to ensure safe startup in cold environments.
Can this be used on systems with capillary tube metering?
No. This 34M72 low ambient kit is designed exclusively for systems utilizing expansion valve (TXV) metering devices.
What is the primary function of the S11 switch in this kit?
The switch monitors liquid line pressure to cycle the condenser fan OFF when pressure drops below 240 psig and ON when it reaches 450 psig, maintaining head pressure stability.
This item is not eligible for free shipping.
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.
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Description
For service technicians managing year-round cooling demands, the Lennox 34M72 Ambient Kit (Catalog Number LB-101123A) is a critical field-installed accessory for PSC condenser fan motor efficiency. This low ambient control kit transitions standard HFC-410A refrigerant systems into performance-ready configurations for server rooms and data centers where head pressure maintenance is non-negotiable. Engineered to prevent coil freeze-ups, the integrated low ambient pressure switch (S11) utilizes factory-set parameters—450 psig cut-in and 240 psig cut-out—to cycle the fan motor and sustain optimal liquid line pressure during low outdoor temperatures. The assembly includes a Schrader depressor tee and essential wiring components, allowing for a seamless interface with existing Lennox air conditioner units. When the job requires maintaining a high-pressure differential across expansion devices in freezing conditions, this OEM pressure-activated fan cycling kit provides the reliability seasoned contractors expect from Genuine Lennox parts.
Key Benefits for Commercial and Residential Applications- Optimized Fan Cycling: Features a non-adjustable low ambient pressure switch to regulate head pressure automatically.
- Broad Compatibility: Specifically designed for PSC (Permanent Split Capacitor) fan motors using R-410A.
- Extended Cooling Range: Ensures the outdoor unit operates efficiently in ambient temperatures down to 30°F.
- Complete Installation Package: Includes the S11 pressure switch, depressor tee with seal cap, and necessary wire nuts for field setup.
- System Protection: Reduces the risk of compressor damage and capacity loss by preventing excessive cycling in cold weather.
Does this kit require additional components for full low-ambient operation?
Yes, for complete protection, technicians must provide a properly sized freezestat (S49) and a compressor crankcase heater to ensure safe startup in cold environments.
Can this be used on systems with capillary tube metering?
No. This 34M72 low ambient kit is designed exclusively for systems utilizing expansion valve (TXV) metering devices.
What is the primary function of the S11 switch in this kit?
The switch monitors liquid line pressure to cycle the condenser fan OFF when pressure drops below 240 psig and ON when it reaches 450 psig, maintaining head pressure stability.
This item is not eligible for free shipping.
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.
