Lennox International Inc (2/4)SA13 warranty Operation, Suction Superheat

Page 7

OPERATION

Sequence of Operation

Cooling

Upon cooling demand, the thermostat closes circuit R andY. Closing R and Y closes the unit contactor, starting the compressor and outdoor fan.The thermostat automatically closes R to G circuit which also brings on the indoor blower at the same time. Upon satisfying cooling demand, the thermo- stat will open the above circuits and open the main contactor, stopping the compressor and outdoor fan. If the unit is equipped with a delay timer, the blower will continue to operate for 90 seconds which improves system efficiency.

Circulating Air Blower

The circulating air blower is controlled by a timing circuit in the blower control.Timings are not adjustable.

There is no blower “on” delay after a call for heating or cooling. Blower “off” delay is 90 seconds after the thermo- stat is satisfied.

Cooling System Performance

For maximum performance of the cooling system, operat- ing temperatures and pressure should be checked. Super- heat should be determined at Standard ARI test conditions of 82°F outdoor and 80°F indoor dry bulb/67°F wet bulb. If superheat measured deviates from values found in Table 3, refrigerant charge should be adjusted accordingly for maximum performance.

Suction Superheat

 

Suction Superheat

Size

@ ARI Conditions

82° OD - 80° IDDB/67° IDWB

 

 

 

 

R22

410A

 

 

 

24

22°

15°

 

 

 

30

20°

15°

36

20°

12°

 

 

 

42

20°

12°

48, 60

20°

10°

 

 

 

Table 3

# 48392M005

Page 7

Page 6 Page 8
Image 7
Page 6 Page 8
Contents Table of Contents Installation Maintenance InstructionsLocation InstallationUsing Accessory Lift Kit Inspection of ShipmentMinimum Clearance Requirements Roof Curb AssemblyTypical Condensate Drain Connection Filters Electrical WiringRemoving Bottom Duct Covers Minimum Required Surface Area For Disposable FiltersTypical Wiring Connections Electrical AccessThermostat Removal of Unit from Common Venting System Heater Kit Accessory InstallationCompressor mounting bolts Heater Kit Accessory if used CompressorSuction Superheat OperationOutdoor Coil Maintenance Electrical SHOCK, Fire Or Explosion HazardOwner Record MotorsLine Voltage Field Installed Wiring Diagram P/NLimited Warranty

(2/4)SA13 specifications

Lennox International Inc. is a leading global provider of innovative climate control solutions for residential and commercial applications. Established in 1895 and headquartered in Richardson, Texas, Lennox has built a reputation for developing high-efficiency heating, ventilation, and air conditioning (HVAC) systems that prioritize energy savings and sustainability.

At the core of Lennox's success is its commitment to technological advancement. The company has pioneered numerous technologies that have revolutionized HVAC systems, such as the introduction of variable-speed air conditioners and smart thermostats. Their Signature and Elite series products feature advanced cooling and heating technologies that optimize energy usage and enhance indoor comfort.

One of the standout features of Lennox products is their sustainability focus. Many of their systems are designed to achieve high Seasonal Energy Efficiency Ratios (SEER) and Annual Fuel Utilization Efficiency (AFUE) ratings, which help consumers save on energy costs and reduce their environmental impact. The company’s dedication to energy efficiency is further exemplified by its use of eco-friendly refrigerants, aligning with industry standards and environmental initiatives.

Lennox is also well-known for integrating smart home technologies into its HVAC systems. The iComfort S30 Smart Thermostat, for instance, offers users the ability to control their home climate remotely via a smartphone app. It utilizes advanced algorithms to learn user preferences and adjust settings accordingly, ensuring optimal comfort while maximizing energy savings.

Furthermore, Lennox’s robust offerings cater to a diverse range of residential and commercial needs, providing tailored solutions for both new construction and retrofit projects. Their broad product portfolio includes air conditioners, heat pumps, furnaces, indoor air quality products, and smart home systems, signifying their comprehensive approach to climate control.

Beyond product innovation, Lennox places a strong emphasis on customer service and support. The company provides extensive training programs for contractors, ensuring that their installations and maintenance services meet high standards of quality. This commitment to excellence has built strong relationships with customers and professionals alike.

Overall, Lennox International Inc. embodies a forward-thinking approach in the HVAC industry, combining cutting-edge technologies, sustainability, and exceptional customer service to deliver superior climate control solutions worldwide. As the demand for energy-efficient systems grows, Lennox is well-positioned to lead the way in transforming how we heat and cool our spaces.
Top Page Image Contents