Lennox International Inc Dave Lennox Signature Collection XC21 System Leak Test and Evacuation

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STEP 4 −− LEAK TEST AND EVACUATION

LOWHIGH

MANIFOLD GAUGE SET

OUTDOOR UNIT

 

 

 

B

A

 

 

 

 

 

 

 

 

TO VAPOR

 

 

 

 

SERVICE VALVE

 

 

 

NOTE − Position

 

 

 

 

canister to deliver

 

 

 

 

liquid refrigerant.

 

 

 

NITROGEN

HFC−410A

 

 

 

 

 

1

CONNECT GAUGE SET

 

 

A. Connect the high pressure hose of an HFC−410A manifold gauge set to the vapor valve service port.

NOTE ,

the high pressure hose is connected to the liquid line port. However, connecting it

to the vapor port better protects the manifold gauge set from high pressure damage.

B.With both manifold valves closed, connect the cylinder of HFC−410A refrigerant to the center port of the manifold gauge set.

NOTE

HFC−410A container will be replaced by the nitrogen container.

2TEST FOR LEAKS

After the line set has been connected to the indoor and outdoor units, check the line set connections and indoor unit for leaks. Use the following procedure to test for leaks:

A.With both manifold valves closed, connect the cylinder of HFC−410A refrigerant to the center port of the manifold gauge set. Open the valve on the HFC−410A cylinder (vapor only).

B.Open the high pressure side of the manifold to allow HFC−410A into the line set and indoor unit. Weigh in a trace amount of HFC−410A. [A trace amount is a maximum of two ounces (57 g) refriger- ant or three pounds (31 kPa) pressure.] Close the valve on the HFC−410A cylinder and the valve on the high pressure side of the manifold gauge set. Disconnect the HFC−410A cylinder.

C.Connect a cylinder of nitrogen with a pressure regulating valve to the center port of the manifold gauge set.

D.Adjust nitrogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit.

E.After a few minutes, open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector.

F.After leak testing, disconnect gauges from service ports.

FIGURE 10

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XC21 SERIES

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Contents General −− Setting the Unit −− ClearancesUnit Dimensions − Inches MM −− Setting the Unit −− Unit PlacementAccess View Side ViewStabilizing Unit on Uneven Surfaces PlacementSlab Mounting Refrigerant Line SETPressor Stub END Distributor Tubes TWO−PIECE Patch Plate Liquid Line Service ValveUncased Coil only ExpansionCAP and Core Removal −− Refrigerant Piping −− Brazing ProceduresFlow Nitrogen Wrap Service ValvesBraze Line SET 7PREPARATION for Next StepIndoor Expansion Valve Installation Sensing Bulb InstallationEqualizer Line Installation Lowhigh Manifold Gauge SET Outdoor Unit To Vapor −− Leak Test and EvacuationLOW High −− Leak Test and EvacuationSAE TEE with Swivel Coupler Minimum 3/8 HoseSize Circuit and Install Disconnect 1SWITCH −− Electrical −− Circuit Sizing and Wire Routing2INSTALL Thermostat 24VAC TransformerRoute Control Wires Ting 3A. Route Control Wires Ting4ROUTE High Voltage and Ground Wires Wiring Entry PointsJ3 ALL Units −− Electrical −− Outdoor Control A175 Jumpers and TerminalsHP only J4 TWO−STAGE Heat Pump only J2Flat metal jumper −− Electrical −− Field Control WiringOn−board link Procedure Start−Up ChecklistsCharging TWO−STAGE Compressor PerformanceXC21 Field Operational Checklist Heating Mode Cooling ModeSTART−UP Checks SubcoolingOutdoor Coil Homeowner Information

Dave Lennox Signature Collection XC21 System, XC21 specifications

Lennox International Inc. has long been synonymous with innovative heating and cooling solutions. One of the standout products in their lineup is the Dave Lennox Signature Collection XC21 System, a central air conditioning unit renowned for its remarkable efficiency, advanced technology, and superior performance.

The XC21 features Lennox’s proprietary Signature Series components, ensuring that homeowners receive top-tier comfort with energy-saving capabilities. One of the main highlights of the XC21 is its impressive SEER (Seasonal Energy Efficiency Ratio) rating of up to 21. This high rating signifies exceptional energy efficiency, allowing homeowners to save significantly on energy bills while maintaining a comfortable indoor environment.

One of the key technologies incorporated into the XC21 is the variable-speed compressor. This feature enables the system to adjust its cooling output in response to the current temperature and humidity levels, providing optimal comfort without excessive energy consumption. The variable-speed operation allows for quieter performance, with sound levels as low as 65 decibels, making it one of the quietest systems available.

Furthermore, the XC21 is designed with the Advanced Energy Efficiency feature, which enhances its capability to regulate energy usage intelligently. This is complemented by the Smart Away feature, allowing the unit to enter energy-saving mode when the homeowner is away, ensuring that no energy is wasted during times of inactivity.

Additionally, the XC21 is built with durable and high-quality materials, including a galvanized steel cabinet that resists rust and corrosion, ensuring longevity and consistent performance in varied weather conditions. It also includes a unique design that allows for easier maintenance and serviceability, minimizing downtime and repair costs.

The XC21 system is compatible with the iComfort S30 smart thermostat, which offers advanced climate control capabilities through Wi-Fi connectivity. This feature allows users to manage their home’s heating and cooling system remotely, providing convenience and enhancing energy efficiency.

In summary, the Dave Lennox Signature Collection XC21 System exemplifies Lennox International Inc.’s commitment to cutting-edge technology, energy efficiency, and customer satisfaction. Its innovative features, high energy efficiency ratings, and user-friendly characteristics make it an excellent choice for homeowners looking to enhance their comfort while reducing energy expenses.
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