Lenox Elite Series XP16 Units Heat Pumps, P506640-01 installation instructions Homeowner

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Indoor Coil

1.Clean coil if necessary.

2.Check connecting lines, joints and coil for evidence of oil leaks.

3.Check condensate line and clean if necessary.

HOMEOWNER

Cleaning of the outdoor unit’s coil should be performed by a trained service technician. Contact your dealer and set up a schedule (preferably twice a year, but at least once a year) to inspect and service your outdoor unit. The following maintenance may be performed by the homeowner.

IMPORTANT

Sprinklers and soaker hoses should not be installed where they could cause prolonged exposure to the outdoor unit by treated water. Prolonged exposure of the unit to treated water (i.e., sprinkler systems, soakers, waste water, etc.) will corrode the surface of steel and aluminum parts and diminish performance and longevity of the unit.

Outdoor Coil

The outdoor unit must be properly maintained to ensure its proper operation.

SPlease contact your dealer to schedule proper inspection and maintenance for your equipment.

SMake sure no obstructions restrict airflow to the outdoor unit.

SGrass clippings, leaves, or shrubs crowding the unit can cause the unit to work harder and use more energy.

SKeep shrubbery trimmed away from the unit and periodically check for debris which collects around the unit.

Cleaning of the outdoor unit’s coil should be performed by a trained service technician. Contact your dealer and set up a schedule (preferably twice a year, but at least once a year) to inspect and service your outdoor unit.

Routine Maintenance

In order to ensure peak performance, your system must be properly maintained. Clogged filters and blocked airflow prevent your unit from operating at its most efficient level.

1.Air Filter Ask your Lennox dealer to show you where your indoor unit’s filter is located. It will be either at the indoor unit (installed internal or external to the cabinet) or behind a return air grille in the wall or ceiling. Check the filter monthly and clean or replace it as needed.

2.Disposable Filter Disposable filters should be replaced with a filter of the same type and size.

NOTE If you are unsure about the filter required for your system, call your Lennox dealer for assistance.

3.Reusable Filter Many indoor units are equipped with reusable foam filters. Clean foam filters with a mild soap and water solution; rinse thoroughly; allow

filter to dry completely before returning it to the unit or grille.

NOTE The filter and all access panels must be in place any time the unit is in operation.

4.Indoor Unit The indoor unit’s evaporator coil is equipped with a drain pan to collect condensate formed as your system removes humidity from the inside air. Have your dealer show you the location of the drain line and how to check for obstructions. (This would also apply to an auxiliary drain, if installed.)

Thermostat Operation

See the thermostat homeowner manual for instructions on how to operate your thermostat.

Heat Pump Operation

Your new Lennox heat pump has several characteristics that you should be aware of:

SHeat pumps satisfy heating demand by delivering large amounts of warm air into the living space. This is quite different from gas- or oil-fired furnaces or an electric furnace which deliver lower volumes of considerably hotter air to heat the space.

SDo not be alarmed if you notice frost on the outdoor coil in the winter months. Frost develops on the outdoor

coil during the heating cycle when temperatures are below 45°F (7°C). An electronic control activates a defrost cycle lasting 5 to 15 minutes at preset intervals to clear the outdoor coil of the frost.

SDuring the defrost cycle, you may notice steam rising from the outdoor unit. This is a normal occurrence. The thermostat may engage auxiliary heat during the defrost cycle to satisfy a heating demand; however, the unit will return to normal operation at the conclusion of the defrost cycle.

Extended Power Outage

The heat pump is equipped with a compressor crankcase heater which protects the compressor from refrigerant slugging during cold weather operation.

If power to your unit has been interrupted for several hours or more, set the room thermostat selector to the EMERGENCY HEAT setting to obtain temporary heat without the risk of serious damage to the heat pump.

In EMERGENCY HEAT mode, all heating demand is satisfied by auxiliary heat; heat pump operation is locked out. After a six-hour compressor crankcase warm-up period, the thermostat can be switched to the HEAT setting and normal heat pump operation may resume.

Preservice Check

If your system fails to operate, check the following before calling for service:

SVerify room thermostat settings are correct.

SVerify that all electrical disconnect switches are ON.

SCheck for any blown fuses or tripped circuit breakers.

SVerify unit access panels are in place.

SVerify air filter is clean.

SIf service is needed, locate and write down the unit model number and have it handy before calling.

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XP16 SERIES

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Contents General Table of ContentsShipping and Packing List Model Number Identification Unit Dimensions − inches mmSide View XP16−024 Base Section XP16 Base with LegsDetail a Typical Unit Parts ArrangementCaps and Fasteners Torque Requirements Operating Service Valves Operating Gauge Set and Service ValvesUsing Manifold Gauge SET To Access Service Port Operating Ball−Type Service Valve1DISCONNECT 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 Removal Removing and Installing PanelsLouvered Panel Installation 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 1CUT and Debur Brazing ProceduresFlow Nitrogen Wrap Service Valves6BRAZE Line SET 7PREPARATION for Next Step2CONNECT Gauges and Equipment for Flushing Procedure Indoor Expansion Valve Installation Installing New Indoor Metering DeviceSensing Bulb Installation Equalizer Line InstallationTest for Leaks S S S Evacuating Line Set and Indoor Coil2INSTALL Thermostat Size Circuit and Install DisconnectElectrical Connections 24VAC TransformerLOW Voltage Connections 4HIGH Voltage Power Supply ConnectionsTypical Field Wiring Typical Unit Wiring Diagram −024, −036 and −048 Only Typical Unit Wiring Diagram −060 Only Unit START−UP Unit Start−UpCalculating System Charge for Outdoor Unit Void of Charge Leak CHECK, Repair and EvacuateConnect Manifold Gauge SET and Weigh in Charge Indoor Unit Connections for Optimizing System ChargeOptimizing System Refrigerant Charge Optimizing ProcedureAdjusting Indoor Airflow SCº = SATºLIQº XP16−060−230 XP16−036−230XP16−048−230 Normal Operating Pressures Temperature PressuresUnit Components System OperationDS2 Green LED FAN TWO Connectors DelayTest 24VACDS2 DS1 Demand Defrost Control A108 Diagnostic LedsSlow OFFSECOND−STAGE Operation Defrost System Defrost Control CONNECTIONS, Jumpers Settings and FeaturesEmergency Heat Amber Light Defrost System OverviewDefrost Cycle Actuation Compressor Delay Mode P5Operational Mode Overview Temperature Mode TIME/TEMPERATURE Mode Demand Mode Thirty 30 Minute TimeDefrost HOW did Defrost TERMINATE?Degrees Resistance Fahrenheit 136.3 2680 High Discharge Sensor RT28 Temperature / Resistance Range S S Test Pin P1 FunctionsProcedure MaintenanceTwo−Stage Modulation Compressors Checks Tools RequiredHomeowner Compressor TemperatureOutdoor Unit FAN Motor PressuresStart UP Checks Cooling ModeXP16 Start−Up and Performance