Lenox 506637-01 System Refrigerant, Connections for Testing and Charging, When to CHARGE?

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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 15. Gauge Set Setup and Connections

START: Determine how refrigerant is metered

WHEN TO CHARGE?

SWarm weather best

SCan charge in colder weather

CHARGE METHOD? Determine by:

SMetering device type

SOutdoor ambient temperature

REQUIREMENTS:

SSufficient heat load in structure

SIndoor temperature between 70-80ºF (21−26ºC)

SManifold gauge set connected to unit

SThermometers:

to measure outdoor ambient temperature

to measure liquid line temperature

to measure suction line temperature

TXV

OUTDOOR AMBIENT

TEMPERATURE

65ºF (18.3ºC)

64ºF (17.7ºC)

and ABOVE

and BELOW

APPROACH OR

WEIGH-IN

SUBCOOLING

 

(SECOND STAGE − HIGH

 

CAPACITY)

 

Figure 16. Determining Charge Method

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506637−01 11/10

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Contents Shipping and Packing List Table of ContentsGeneral AIR ConditionerSide View Unit Dimensions − Inches mmModel Number Identification XXX 230 TOP ViewTypical Unit Parts Arrangement Plumbing and Switches ComponentsControl Panel Operating Service Valves Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Torque RequirementsTo Access Service Port Operating Angle Type Service ValveOperating Ball Type Service Valve Reinstall Stem CapRecovering Refrigerant Recovering Refrigerant from Existing SystemRefrigerant from System 1DISCONNECT Power 2CONNECT Manifold Gauge SETPositioning Considerations New Outdoor Unit PlacementClearance on ALL Sides Placing Unit on SlabDetail a Outside Unit Placement Placement, Slab Mounting and Stabilizing UnitRoof Mounting Removing and Installing PanelsLouvered Panel Installation Louvered Panel RemovalRefrigerant Line SET New or Replacement Line SetRefrigerant Line Set Refrigerant Line SET From Vertical to Horizontal Refrigerant Line SET Alling Horizontal RunsBrazing Connections Brazing Procedures 1CUT and Debur6BRAZE Line SET Wrap Service ValvesFlow Nitrogen 7PREPARATION for Next StepInstalling Indoor Expansion Valve Flushing Line Set and Indoor CoilSensing Bulb Installation Installing Indoor Metering DeviceIndoor Expansion Valve Installation Equalizer Line InstallationLeak Test Line Set and Indoor Coil Leak TestEvacuating Line Set and Indoor Coil Evacuating SystemElectrical Size Circuit and Install Disconnect2INSTALL Thermostat 24VAC TransformerTypical Unit Wiring Diagram Servicing Units Delivered Void of Charge Unit Start−UpSystem Refrigerant Connections for Testing and ChargingWhen to CHARGE? RequirementsWeigh in Charging Method Checking AIR Flow AT Indoor CoilCalculating System Charge for Outdoor Unit Void of Charge Above BelowSystem Operation TWO−STAGE CompressorIndoor Unit MaintenanceUnit Components Indoor CoilHomeowner Compressor Start−Up and Performance ChecklistTemperature Outdoor Unit FAN Motor

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