Lennox International Inc Dave Lennox Signature Collection XC21 System Wrap Service Valves

Page 7

CAUTION

 

 

 

WARNING

Brazing alloys and flux contain materials which are

 

 

 

 

 

Danger of fire. Bleeding the refrigerant

hazardous to your health.

 

 

 

Avoid breathing vapors or fumes from

brazing

 

 

charge from only the high side may result

 

 

in pressurization of the low side shell and

operations. Perform operations only in well−ventilated

 

 

 

 

suction tubing. Application of a brazing

areas.

 

 

 

 

 

 

torch to a pressurized system may result

Wear gloves and protective goggles or face shield to

 

 

 

 

in ignition of the refrigerant and oil

protect against burns.

 

 

 

 

 

 

mixture. Check the high and low

Wash hands with soap and water after handling brazing

 

 

 

 

pressures before applying heat.

alloys and flux.

 

 

 

 

 

 

 

 

 

 

 

 

WRAP SERVICE VALVES

To help protect service valve seals during brazing, wrap water−saturated cloths around service valve bodies and copper tube stubs. Use

4 additional water−saturated cloths under the valve body to protect the base paint.

 

FLOW NITROGEN

WARNING

Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration

FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE

5 gauge set into the valve stem port connection on the liquid service

may result if you do not wrap a water−saturated cloth around

valve and out of the suction / vapor valve stem port. See steps 3A, 3B

both liquid and suction line service valve bodies and copper

and 3C on previous page and below for manifold gauge setup.

tube stub while brazing the line set! The braze, when

 

BRAZE LINE SET

complete, must be quenched with water to absorb any

residual heat.

Cloths must remain water−saturated throughout the brazing and

Do not open service valves until refrigerant lines and

6cool−down process.

indoor coil have been leak−tested and evacuated. Refer

1. Braze liquid line to liquid line service valve.

to Installation and Service Procedures manual found on

DAVENET.

 

2.Braze suction / vapor line to suction / vapor service valve.

6B

SUCTION / VAPOR LINE

WATER−SATURATED CLOTHS

IMPORTANT !

 

Allow braze joint to cool. Apply additional

 

water−saturated cloths to help cool brazed

 

joints. Do not remove water−saturated cloths

 

until piping has cooled. Temperatures above

6A

250ºF will damage valve seals.

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

SUCTION / VAPOR SERVICE

PORT MUST BE OPEN AND

SERVICE PORT CORE RE-

MOVED TO ALLOW EXIT POINT

FOR NITROGEN FLOW

LIQUID LINE

WATER−SATURATED

CLOTHS

7PREPARATION FOR NEXT STEP

After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water−saturated cloths to both services valves to cool piping. Once piping is cool, remove all water−saturated cloths.

FIGURE 8

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XC21 SERIES

Page 6 Page 8
Image 7
Page 6 Page 8
Contents General −− Setting the Unit −− ClearancesSide View −− Setting the Unit −− Unit PlacementUnit Dimensions − Inches MM Access ViewRefrigerant Line SET PlacementStabilizing Unit on Uneven Surfaces Slab MountingPressor Expansion Liquid Line Service ValveStub END Distributor Tubes TWO−PIECE Patch Plate Uncased Coil onlyCAP and Core Removal −− Refrigerant Piping −− Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen Braze Line SETSensing Bulb Installation Indoor Expansion Valve InstallationEqualizer Line Installation Lowhigh Manifold Gauge SET Outdoor Unit To Vapor −− Leak Test and EvacuationMinimum 3/8 Hose −− Leak Test and EvacuationLOW High SAE TEE with Swivel Coupler24VAC Transformer −− Electrical −− Circuit Sizing and Wire RoutingSize Circuit and Install Disconnect 1SWITCH 2INSTALL ThermostatWiring Entry Points 3A. Route Control Wires TingRoute Control Wires Ting 4ROUTE High Voltage and Ground WiresTWO−STAGE Heat Pump only J2 −− Electrical −− Outdoor Control A175 Jumpers and TerminalsJ3 ALL Units HP only J4Flat metal jumper −− Electrical −− Field Control WiringOn−board link TWO−STAGE Compressor Performance Start−Up ChecklistsProcedure ChargingXC21 Field Operational Checklist Subcooling Cooling ModeHeating Mode START−UP ChecksOutdoor 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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