Lenox Elite Series Servicing Units Delivered Void of Charge, Unit Start−Up, System Refrigerant

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Servicing Units Delivered Void of Charge

If the outdoor unit is void of refrigerant, clean the system using the procedure described below.

1.Leak check system using procedure outlined on page 17.

2.Evacuate the system using procedure outlined on page 18.

3.Use nitrogen to break the vacuum and install a new filter drier in the system.

4.Evacuate the system again using procedure outlined on page 18.

5.Weigh in refrigerant using procedure outlined in figure 21.

6.Monitor the system to determine the amount of moisture remaining in the oil. It may be necessary to replace the filter drier several times to achieve the required dryness level. If system dryness is not verified, the compressor will fail in the future.

Unit Start−Up

IMPORTANT

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

1.Rotate fan to check for binding.

2.Inspect all factory− and field−installed wiring for loose connections.

3.After evacuation is complete, open both the liquid and vapor line service valves to release the refrigerant charge contained in outdoor unit into the system.

4.Replace the stem caps and tighten to the value listed in table 1.

5.Check voltage supply at the disconnect switch. The voltage must be within the range listed on the unit’s nameplate. If not, do not start the equipment until you have consulted with the power company and the voltage condition has been corrected.

6.Set the thermostat for a cooling demand. Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit.

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

8.Check system for sufficient refrigerant by using the procedures listed under System Charge.

System Refrigerant

This section outlines procedures for:

1.Connecting gauge set for testing and charging;

2.Checking and adjusting indoor airflow;

3.Adding or removing refrigerant.

GAUGE SET

CONNECTIONS FOR TESTING AND CHARGING

MANIFOLD GAUGE SET

LOW HIGH

 

SUCTION LINE

 

B SERVICE PORT

 

 

CONNECTION

 

 

REFRIGERANT TANK

 

CHARGE IN

A

 

LIQUID PHASE

 

 

 

DIGITAL SCALE

D TEMPERATURE

C

SENSOR

 

 

 

 

 

TO LIQUID

 

 

LINE SERVICE

 

 

VALVE

OUTDOOR UNIT

VAPOR LINE

SERVICE VALVE

TEMPERATURE SENSOR

(LIQUID LINE)LIQUID LINE SERVICE VALVE

AClose manifold gauge set valves and connect the center hose to a cylinder of HFC−410A. Set for liquid phase charging. BConnect the manifold gauge set’s low pressure side to the suction line service port.

CConnect the manifold gauge set’s high pressure side to the liquid line service port.

DPosition temperature sensor on liquid line near liquid line service port.

Figure 18. Gauge Set Setup and Connections

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XC14 SERIES

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Contents AIR Conditioner Table of ContentsGeneral Shipping and Packing List230 Unit Dimensions − Inches mmModel Number Identification Control Panel Plumbing and Switches ComponentsTypical Unit Parts Arrangement Torque Requirements Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Operating Service ValvesReinstall Stem Cap Operating Angle Type Service ValveOperating Ball Type Service Valve To Access Service Port2CONNECT Manifold Gauge SET Recovering Refrigerant from Existing System1DISCONNECT Power Recovering RefrigerantPlacing Unit on Slab Unit PlacementClearance on ALL Sides Positioning ConsiderationsDetail E Deck Top Mounting Detail a Outside Unit PlacementDetail C Elevated Slab Mounting using Feet Extenders Detail D Slab Side MountingLouvered Panel Removal Removing and Installing PanelsLouvered Panel Installation Roof MountingRefrigerant Line Set New or Replacement Line SetRefrigerant Line SET Refrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 1CUT and Debur Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SETFlushing Line Set and Indoor Coil Installing Indoor Expansion ValveEqualizer Line Installation Installing Indoor Metering DeviceIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Leak Test Line Set and Indoor CoilEvacuating System Evacuating Line Set and Indoor Coil24VAC Transformer Size Circuit and Install Disconnect2INSTALL Thermostat ElectricalVAC Control Wiring Diagrams Field Installed Typical Factory Wiring Diagram Interlink Compressor Typical Unit Wiring Diagram System Refrigerant Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpDevice? Determining Charge MethodWhich indoor MeteringCalculating System Charge for Outdoor Unit Void of Charge Checking AIR Flow AT Indoor CoilBelow AboveSHº Superheat Values +/−5ºF 40ºFUnit Components System OperationNormal Operating Pressures Liquid +10 and Suction +5 psig Unit Nameplate Actual MaintenanceIndoor Unit Indoor CoilState Start−Up and Performance ChecklistInstaller City Job Name Job no Date Job Location City

Elite Series, XC14 specifications

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