Lennox International Inc Dave Lennox Signature Collection XP17 System HEAT PUMPS Roof Mounting

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STABILIZING UNIT ON UNEVEN SURFACES

IMPORTANT

Unit Stabilizer Bracket Use (field−provided):

Always use stabilizers when unit is raised above the factory height. (Elevated units could become unstable in gusty wind conditions).

Stabilizers may be used on factory height units when mounted on unstable an uneven surface.

1.Remove two side louvered panels to expose the unit base.

2.Install the brackets as illustrated in figure 5, detail D using conventional practices.

3.Replace the panels after installation is complete.

ROOF MOUNTING

Install the unit a minimum of six inches (152 mm) above the roof surface to avoid ice build−up around the unit. Locate the unit above a load bearing wall or area of the roof that can adequately support the unit. Consult local codes for rooftop applications.

If unit coil cannot be mounted away from prevailing winter winds, a wind barrier should be constructed. Size barrier at least the same height and width as outdoor unit. Mount barrier 24 inches (610 mm) from the sides of the unit in the direction of prevailing winds.

PREVAILING WINTER

WINDS

WIND BARRIER

 

INLET AIR

24"

 

 

(610)

INLET AIR

INLET AIR

Figure 6. Rooftop Application and Wind Barrier

Inches (millimeters)

NOTICE

Roof Damage!

This system contains both refrigerant and oil. Some rubber roofing material may absorbed oil and cause the rubber to swell when it comes into contact with oil. The rubber will then bubble and could cause leaks. Protect the roof surface to avoid exposure to refrigerant and oil during service and installation. Failure to follow this notice could result in damage to roof surface.

Removing and Installing Panels

IMPORTANT

Do not allow panels to hang on unit by top tab. Tab is for alignment and not designed to support weight of panel.

IMPORTANT

To help stabilize an outdoor unit, some installations may require strapping the unit to the pad using brackets and anchors commonly available in the marketplace.

WARNING

To prevent personal injury, or damage to panels, unit or structure, be sure to observe the following:

While installing or servicing this unit, carefully stow all removed panels out of the way, so that the panels will not cause injury to personnel, nor cause damage to objects or structures nearby, nor will the panels be subjected to damage (e.g., being bent or scratched).

While handling or stowing the panels, consider any weather conditions, especially windy conditions, that may cause panels to be blown around and battered.

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XP17 SERIES

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Contents Table of Contents GeneralHeat Pumps Side View Access View Unit Dimensions −− Inches mmModel Number Identification Base with Elongated LegsControl BOX Typical Unit Parts ArrangementUsing Manifold Gauge Set Operating Service ValvesShipping and Packing List Operating Ball Type Service Valve Operating Angle Type Service ValveTo Access Service Port Reinstall Stem Cap1DISCONNECT Power Recovering Refrigerant from Existing SystemRecovering Refrigerant 2CONNECT Manifold Gauge SETUnit Placement Placement, Slab Mounting and Stabilizing Unit Detail a Outside Unit PlacementRemoving and Installing Panels Stabilizing Unit on Uneven SurfacesRoof Mounting Louvered Panel Removal Louvered Panel InstallationDetail C Detail D Detail aRefrigerant Line SET New or Replacement Line SetRefrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 2CAP and Core Removal 1PIPING Panel Removal and Preparing Line SETFlow Nitrogen Wrap Service ValvesBraze Line SET 7PREPARATION for Next StepFlushing Line Set and Indoor Coil Flushing Line Set and Indoor CoilIndoor Expansion Valve Installation Installing Indoor Expansion ValveSensing Bulb Installation Equalizer Line InstallationLeak Test Leak Test Line Set and Indoor CoilS S S S Evacuating Line Set and Indoor Coil2INSTALL Thermostat Size Circuit and Install DisconnectElectrical 24VAC Transformer3A. Route Control Wires Ting Route Control Wires Ting4ROUTE High Voltage and Ground Wires Typical XP17 Wiring Heat Pump Control AGE Heat Pump Control A175 Jumpers and TerminalsHeat Pump Control A175 Jumper and Terminal Descriptions Flat metal jumper Field Control WiringFurnace Control Servicing Units Delivered Void of Charge Connections for Testing and ChargingUnit Start−Up System RefrigerantHeating Mode Indoor Airflow Check Cooling Mode Indoor Airflow CheckAdding or Removing Refrigerant Airflowindoor CoilSubcooling Charging Method Using HFC−410A Weigh In MethodAir Handler / Coil Match ups and Targeted Subcooling Values Psig Operating and Temperature PressuresDefrost System System OperationsUnit Sensors Resistor Location Sensor Temperature / Resistance RangeYES Defrost Calibration Sequence of OperationsS S Test Pin E33 FunctionsOr below Low Pressure S87 Switch OperationHigh Pressure Switch S4 Sequence of Operation Input Fault or Miswire Degrees Resistance Fahrenheit 136.3 2680 DS11 and DS14 ATUS, Fault Lockout LED Codes System Status, Fault and Lockout LED CodesResetting Fault and Lockout LED Codes DS15 and DS13 Ault Lockout LED CodesModerate Device Alert Status225ºF 107ºC Lockout Vice removed or Clears after Troubleshooting Field Configuration and TestingFAN Motor B4 Test Procedure FAN Motor Control A177 OPERATION,Fan Motor Control Stage LED Indicator Codes Fan Motor Control Error/Fault LED CodesFan Motor Control RPM, LED Code and DC Voltage Output Fan Motor Control Flash and Pause DurationsTOP Grille Adjustment TOP Grille or FAN Motor Mount Adjustment for FAN ClearanceFAN Motor Position Adjustment Demand BeginsFAN Motor Control A177 PULSE−WIDTH Modulation PWM Testing for External Power to Fan Motor Control Start StripTerminal FinishSnow Guard Top Cover MaintenanceHomeowner SunSource Home Energy System Cooling Mode XP17 Start−Up and Performance ChecklistHeating Mode START−UP Checks