Lennox International Inc Dave Lennox Signature Collection XC21 System 24VAC Transformer

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STEP 5 −− ELECTRICAL −− Circuit Sizing and Wire Routing

In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC).

Refer to the furnace or air handler installation instructions for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size.

24VAC TRANSFORMER

IMPORTANT !

If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start−up to pre- vent compressor damage as a result of slugging.

CAUTION

Use the transformer provided with the furnace or air han- dler for low-voltage control power (24VAC − 40 VA mini- mum)

WARNING

Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes.

Line voltage is present at all components when unit is not in operation on units with single-pole contactors. Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power supplies.

ELECTROSTATIC

DISCHARGE

(ESD)

Precautions and

Procedures

Electrostatic discharge can affect electronic components. Take care during unit installation and service to protect the unit’s electronic controls. Precautions will help to avoid control exposure to electrostatic discharge by putting the unit, the control and the technician at the same electrostatic potential. Touch hand and all tools on an unpainted unit surface before performing any service procedure to neutralize electrostatic charge.

SIZE CIRCUIT AND INSTALL DISCONNECT

1SWITCH

Refer to the unit nameplate for minimum circuit ampacity, and maximum fuse or circuit breaker size (HACR per NEC). Install power wiring and properly sized disconnect switch.

SERVICE

DISCONNECT

SWITCH

2INSTALL THERMOSTAT

Install room thermostat (ordered separately) on an inside wall in the center of the conditioned area and 5 feet (1.5m) from the floor. The thermostat should not be installed on an outside wall or where it can be affected by sunlight or drafts.

THERMOSTAT

5 FEET

(1.5M)

NOTE Units are approved for use only with copper conductors. Ground unit at disconnect switch or connect to an earth ground.

NOTE AC, Class II circuit connections are made in the control box.

FIGURE 12

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XC21 SERIES

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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 SETEqualizer Line Installation Indoor Expansion Valve InstallationSensing Bulb 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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