Lennox International Inc Dave Lennox Signature Collection XC21 System J3 ALL Units, HP only J4

Page 13

STEP 5 −− ELECTRICAL (Continued) −− Outdoor Control (A175) Jumpers and Terminals

Communication System

The jumper settings and link are default settings and ONLY control system operation if configuration settings in the icomfortt−enabled thermostat are not available.

Non−Communicating System

The unit will operate based on jumper settings and R−TO− DS link on the MAIN CONTROL. All unit setting changes must be done at the MAIN CONTROL. The Lennox ComfortSense® 7000 thermostat may be used, as well as other non−communicating electronic−only thermostats.

The Lennox icomfortt−enabled thermostat must be used in communicating applications.

NOTE Fan cycling routine when activated will cycle the fan ON for five minutes if the outdoor ambient air temperature is between 15ºF and 35ºF and the compressor has been OFF for 25 to 30 minutes. This option is to help reduce the potential for ice build up on the orifice ring during system OFF cycles that are greater than 25 to 30 minutes.

J3 ALL UNITS)

Set up of jumpers on replacement outdoor control.

(HP ONLY) J4

COMPRESSOR SHIFT DELAY

30

SECOND DELAY (DEFAULT)

30

7−SEGMENT

DISPLAY

PUSH

BUTTON

FAN CYCLING

JUMPER ON

FAN ON FOR 5 MINUTES ON

JUMPER OFF

DISABLE (DEFAULT)

OFF

SEE NOTE ABOVE FOR FURTHER DETAILS.

J1 (HP ONLY)

DEFROST TERMINATION TEMPERATURE

100

DEGREE

TARGET 100907050

0

SECOND DELAY

0

(TWO−STAGE HEAT PUMP ONLY) J2

SECOND−STAGE LOCK−IN TEMPERATURE

55

DEGREE

TARGET

90 DEGREE TARGET

70 DEGREE TARGET

50 DEGREE TARGET

(DEFAULT)

100 100100 90 9090 70 7070 50 5050

90 1009070 50

(DEFAULT WHEN JUMPER IS REMOVED OR MISSING)

55

 

 

50 45

 

 

40

50

 

 

DEGREE

 

 

TARGET

 

 

55

 

 

50

 

 

45 40

45

 

 

DEGREE

 

 

TARGET

 

 

55

 

 

50 45

 

 

40

40 DEGREE

TARGET (DEFAULT)

55

 

50 45

 

40

DS TO R TWO−STAGE UNIT ONLY)

Cut for Humiditrol® − Enhanced Dehumification Accessory (EDA) applications.

NOTE − LINK NOT APPLICABLE TO ONE−STAGE UNITS. CUTTING LINK WILL HAVE NO AFFECT ON OPERATION OF ONE−STAGE UNITS.

FIGURE 14

Page 13

XC21 SERIES

Page 12 Page 14
Image 13
Page 12 Page 14
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 StepSensing Bulb Installation Indoor Expansion Valve 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.
Top Page Image Contents