Lennox International Inc LENNOX Elite Series XP13 Units HEAT PUMPS Satº Liqº, Scº, Refrigerant

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OPTIMIZE CHARGE USING SUBCOOLING

USE

COOLING

MODE

60ºF

(15ºC)

USE

HEATING

MODE

1.Check liquid and vapor line pressures. Compare pressures with either second−stage heat or cooling mode normal operating pressures listed in table 4. Table 4 is a general guide and expect minor pressures variations. Significant pressure differences may indicate improper charge or other system problem.

2.Decide whether to use cooling or heating mode based on current outdoor ambient temperature:

AUse COOLING MODE when:

S Outdoor ambient temperature is 60°F (15.5°C) and above.

S Indoor return air temperature range is between 70 to 80°F (21−27°C). This temperature range is what the target subcooling values are base upon in table 3.

If indoor return air temperature is not within reference range, set thermostat to cooling mode and a setpoint of 68ºF (20ºC). This should place the outdoor unit into second−stage (high−capacity) cooling mode. When operating and temperature pressures have stabilized, continue to step 3.

BUse HEATING MODE when:

S Outdoor ambient temperature is 59°F (15.0°C) and below.

S Indoor return air temperature range is between 65−75°F (18−24°C). This temperature range is what the target subcooling values are base upon in table 3.

If indoor return air temperature is not within reference range, set thermostat to heating mode and a setpoint of 77ºF (25ºC). This should place the outdoor unit into second−stage (high−capacity) heating mode. When operating and temperature pressures have stabilized, continue to step 3.

3.Read the liquid line pressure; then find its corresponding temperature pressure listed in table 5 and record it in the SATº space to the left.

4.Read the liquid line temperature; record in the LIQº space to the left.

SATº

LIQº –

5.Subtract LIQº temperature from SATº temperature to determine subcooling; record it in SCº space to the left..

6.Compare SCº results with table 3 (either Heating or Cooling mode column), also consider any additional charge required for line set lengths longer than 15 feet and/or unit matched component combinations (Add Charge column).

SCº

=

 

7.

If subcooling value is:

 

 

 

 

 

 

 

A GREATER than shown for the applicable unit match component, REMOVE

 

 

 

 

refrigerant;

 

 

 

 

B LESS than shown for the applicable unit match component, ADD refrigerant.

 

8.

If refrigerant is added or removed, repeat steps 3 through 6 to verify charge.

 

9.

Close all manifold gauge set valves and disconnect gauge set from outdoor unit.

10.Replace the stem and service port caps and tighten as specified in Operating Service Valves on page .

11.Recheck voltage while the unit is running. Power must be within range shown on the nameplate.

Figure 21. Using HFC−410A Subcooling Method tage (High Capacity)

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XP13 SERIES

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Contents Shipping and Packing List Table of ContentsGeneral Model Number Identification 13 −036 − 230 −08 Unit Dimensions − Inches mmSide View TOP ViewTypical Unit Parts Arrangement PLUMBING, Switches Sensor ComponentsControl Panel Operating Service Valves Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Caps and Fasteners Torque RequirementsOperating Ball−Type Service Valve Operating Angle−Type Service ValveReinstall Stem Cap 1DISCONNECT Power Recovering Refrigerant from Existing System3RECOVERING Refrigerant Method Method 2 LimitationsNew Outdoor Unit Placement Placement, Slab Mounting and Stabilizing Unit Detail a Outside Unit PlacementLouvered Panel Installation Removing and Installing PanelsLouvered Panel Removal Using Existing Line SET NEW or Replacement Line SET InstallationLine Set Requirements Adding Polyol Ester OIL RequirementsRefrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 2CAP and Core Removal 1CUT and DeburFlow Nitrogen Wrap Service Valves6BRAZE Line SET Preparation for Next Step3FLUSHING Line SET 2CONNECT Gauges and Equipment for Flushing ProcedureIndoor Expansion Valve Installation Installing New Indoor Metering DeviceSensing Bulb Installation Equalizer Line InstallationConnect Gauge SET Leak Test Line Set and Indoor CoilTest for Leaks 2EVACUATE the System Evacuating Line Set and Indoor Coil2INSTALL Thermostat Size Circuit and Install DisconnectElectrical 24VAC TransformerTypical Unit Wiring Diagram Unit START−UP Unit Start−UpConnect Manifold Gauge SET and WEIGH−IN Charge Leak CHECK, Repair and EvacuateConnections for Optimizing System Charge Calculating System Charge for Outdoor Unit Void of Charge Using HFC−410A Weigh In MethodAdjusting Indoor Airflow Optimizing ProcedureOptimizing System Refrigerant Charge CFM =SCº SATº LIQºIf subcooling value is RefrigerantNormal Operating Pressures − Liquid +10 and Vapor +5 Psig HFC−410A Temperature F − Pressure Psig Defrost System System OperationDefrost Control CMC1 OFF Dealer MaintenanceIndoor Unit Indoor CoilXP13 Series Installer City Start−Up and Performance ChecklistJob Name Job no Date Job Location City Sequence of Operation Thermostat

LENNOX Elite Series XP13 Units HEAT PUMPS, 06/11 50672801 specifications

Lennox International Inc., a leading name in the HVAC (heating, ventilation, and air conditioning) industry, has a reputation for delivering high-quality and energy-efficient systems. One of the standout products in their lineup is the Lennox Elite Series XP13 heat pump, model number 50672801. This heat pump is designed to provide exceptional comfort throughout the year while offering efficiency and reliability that homeowners can depend on.

The Lennox Elite Series XP13 heat pump features a compact design that makes it suitable for various outdoor spaces. One of its main characteristics is its efficiency, boasting a SEER (Seasonal Energy Efficiency Ratio) rating of up to 16 and an HSPF (Heating Seasonal Performance Factor) of up to 9. This means that the XP13 can help reduce energy bills, making it an eco-friendly choice for homeowners looking to minimize their carbon footprint.

This heat pump utilizes advanced technology to ensure optimal performance. The XP13 is equipped with a scroll compressor, which operates quietly and efficiently compared to traditional compressors. This feature ensures a more reliable and consistent temperature control, which translates to enhanced comfort levels in the home. Moreover, the XP13 is designed with a sound-dampening system that reduces operational noise, making it one of the quieter options in the market.

Another key aspect of the XP13 heat pump is its innovative use of advanced coil technology. The unit's coils are made from high-grade aluminum, which promotes superior heat exchange and improves overall efficiency. In addition, the XP13 is designed with a built-in filter drier that helps remove moisture and contaminants from the refrigerant, protecting the system from potential damage and enhancing its lifespan.

The XP13 model is compatible with the iComfort S30 smart thermostat, allowing users to control their home’s temperature remotely. This smart technology provides energy-saving options and real-time updates, ensuring that homeowners can optimize their HVAC systems for both comfort and efficiency.

Overall, the Lennox Elite Series XP13 heat pump, model 50672801, exemplifies a commitment to delivering high-performance heating and cooling solutions. With its energy-efficient design, advanced technologies, and features aimed at enhancing user comfort and convenience, the XP13 remains a top choice among homeowners looking for a reliable and effective heat pump system.
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