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Lennox Elite XP16-024-230, Installation Instructions Manual

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Lennox Elite XP16-024-230 Installation Instructions Manual Download Page 18

Page 18

Field Operation Checklist for Two-Stage Modulation Compressors

Unit Readings

Y1 - First‐Stage

Expected results during Y2

demand (Toggle switch On)

Y2 - Second‐Stage

COMPRESSOR

Voltage

Same

Amperage

Higher

OUTDOOR UNIT FAN
MOTOR

Amperage

Same or Higher

TEMPERATURE

Ambient

Same

Outdoor Coil Discharge Air

Higher

Compressor Discharge Line

Higher

Indoor Return Air

Same

Indoor Coil Discharge Air

Lower

PRESSURES

Suction (Vapor)

Lower

Liquid

Higher

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Summary of Contents for Elite XP16-024-230

Page 1: ...ntenance can cause property damage personal inju ry or loss of life Installation and service must be performed by a licensed professional installer or equivalent or service agency CAUTION Before attempting to perform any service or mainte nance turn the electrical power to unit OFF at discon nect switch NOTICE For more in depth information consult the Installa tion and Service Procedures manual av...

Page 2: ...5 1143 35 1 2 902 39 1 2 1003 STEP 1 SETTING THE UNIT Continued Unit Placement NOTICE Roof Damage This systemcontainsbothrefrigerantand oil Some rubberroofing material may absorb oil causing the rubber to degrade Failure to follow this notice could result in damage to roof surface WARNING To prevent personal injury as well as damage to panels unit or structure observe the following While installin...

Page 3: ...e SLAB MOUNTING MOUNTING SLAB BUILDING STRUCTURE GROUND LEVEL FIGURE 3 LEG DETAIL BASE 2 50 8MM SCH 40 FEMALE THREADED ADAPTER ELEVATED SLAB MOUNTING USING FEET EXTENDERS 2 50 8MM SCH 40 MALE THREADED ADAPTER Use additional 2 SCH 40 male threaded adapters which can be threaded into the female threaded adapters to make additional adjustments to the level of the unit FIGURE 4 Unit Stabilizer Bracket...

Page 4: ...s ter POE oils are used in Lennox units charged with HFC 410A refrigerant Residual mineral oil can act as an insulator preventing proper heat transfer It can also clog the expansion device and reduce sys tem performance and capacity Failure to properly flush the system per this instruc tion and the detailed Installation and Service Proce dures manual will void the warranty WARNING When using a hig...

Page 5: ...rings H Use a field provided fitting to temporarily reconnect the liquid line to the indoor unit s liquid line orifice housing LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD CYLINDER CONTAINING CLEAN HCFC 22 TO BE USED FOR FLUSHING Positioned to deliver liquid refrigerant LIQUID LINE SERVICE VALVE INLET DISCHARGE TANK RETURN CLOSED OPENED RECOVERY CYLINDER RECOVERY MACHINE NEW OUTDOOR UNIT VAPOR LIN...

Page 6: ...ipe must remain round Do not crimp end of the line Remove service cap and core from both the suction vapor and liquid line service ports 1 2 LIQUID LINE SERVICE VALVE SERVICE PORT CORE SERVICE PORT CAP SERVICE PORT CORE SERVICE PORT CAP CUT AND DEBUR LINE SET SIZE MATCHES SERVICE VALVE CONNECTION COPPER TUBE STUB SERVICE VALVE CONNECTION REFRIGERANT LINE DO NOT CRIMP SERVICE VALVE CONNECTOR WHEN P...

Page 7: ...SET TO SERVICE VALVES POINT FLAME AWAY FROM SERVICE VALVE PREPARATION FOR NEXT STEP 7 WRAP SERVICE VALVES To help protect service valve seals during brazing wrap water saturated cloths around service valve bodies and copper tube stubs Use additionalwater saturated cloths underneath the valve body to protect the base paint 4 FLOW NITROGEN Flow regulated nitrogen at 1 to 2 psig through the refrigera...

Page 8: ...C Install one of the provided Teflon rings around the stubbed end of the check expansion valve and lightly lubricate the connector threads and expose surface of the Teflon ring with refrigerant oil D Attach the stubbed end of the check expansion valve to the liquid line orifice housing Finger tighten and use an appropriatelysized wrench to turn an additional 1 2 turn clockwise as illustrated in th...

Page 9: ...FC 410A refrigerant to the center port of the manifold gauge set Open the valve on the HFC 410A cylinder vapor only B Open the high pressure side of the manifold to allow HFC 410A into the line set and indoor unit Weigh in a trace amount of HFC 410A A trace amount is a maximum of two ounces 57 g refriger ant or three pounds 31 kPa pressure Close the valve on the HFC 410A cylinder and the valve on ...

Page 10: ...ld gauge valves F When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to a cylinder of HFC 410A positioned to deliver liquid refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit G Perform the following S Close manifold gauge valves S Shut off HFC 410A cylinder S Re...

Page 11: ...of slugging CAUTION ELECTROSTATIC DISCHARGE ESD Precautions and Procedures Electrostatic discharge can affect electronic components Take care during unit installation and service to protect the unit s electronic controls Precautions will help to avoid control exposure to electrostatic discharge by putting the unit the control and the technician at the same electrostatic potential Touch hand and al...

Page 12: ...ation of field installed low and high voltage circuits Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated See figures 13 and 14 for typical field connections when connecting unit to either a CBX32MV or CBX40UHV in non communicating mode For connections to other Lennox air handlers or furnaces see the ComfortSense 7000 installation instruction f...

Page 13: ...SEE CBX40UHV INSTALLATION INSTRUCTION FOR FURTHER DETAILS Typical Field Wiring Heat Pump Application with CBX32MV or CBX40UHV FIGURE 13 YELLOW BLUE NOT REQUIRED FOR SINGLE STAGE RED BLACK PURPLE PURPLE BLACK BLUE RED FAN RELAY NOT REQUIRED WITH SINGLE SPEED OUTDOOR FAN OUTDOOR SENSOR X2658 COMFORTSENSEt 7000 THERMOSTAT OUTDOOR UNIT CUT ON BOARD LINK R O CUT ON BOARD LINK Y1 Y2 FOR TWO STAGE A C ON...

Page 14: ...nd stage operation UNIT COMPONENTS Demand Defrost Control A108 The demanddefrostcontrolmeasuresdifferential temper atures to detect when the system is performing poorly be cause of ice build up on the outdoor coil The controller self calibrates when the defrost system starts and after each system defrost cycle The demand defrost control s components are shown in figure 15 S Demand defrost control ...

Page 15: ...jumper is installed on the DELAY pins the compressor will be cycled off for 30 seconds going in and out of the defrost mode Units are shipped with jumper installed on DELAY pins NOTE The 30 second off cycle is NOT functional when TEST pins on P1 are jumpered P6 TST PS DF C R O Y1 Y2 Factory Test Connectors No field use DS1 RED LED Diagnostic LED Valid states for demand defrost control two LEDs are...

Page 16: ...tion NOTE The demand defrost control accurately measures the performance of the system as frost accumulates on the outdoor coil This typically will translate into longer running time between defrost cycles as more frost accumulates on the outdoor coil before the demand defrost control initiates defrost cycles DEFROST CONTROL CONNECTIONS JUMPERS SETTINGS AND FEATURES Defrost Temperature Termination...

Page 17: ...ricted air flow over indoor or outdoor coil B Improper refrigerant charge in system C Improper metering device installed or incorrect operation of metering device D Incorrect or improper sensor location or connection to system A Remove any blockages or restrictions from coils and or fans Check indoor and outdoor fan motor for proper current draws B Check system charge using subcooling method C Che...

Page 18: ...tch On Y2 Second Stage COMPRESSOR Voltage Same Amperage Higher OUTDOOR UNIT FAN MOTOR Amperage Same or Higher TEMPERATURE Ambient Same Outdoor Coil Discharge Air Higher Compressor Discharge Line Higher Indoor Return Air Same Indoor Coil Discharge Air Lower PRESSURES Suction Vapor Lower Liquid Higher Downloaded from ManualsNet com search engine ...

Page 19: ... Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or installation instructions for required subcooling and approach temperatures Subcooling A B SUBCOOLING Saturated Condensing Temperature A minus Liquid Line Temperature B Approach A B APPROACH Liquid Line Temperature A minus Outdoor Air Temperature B Indoor Coil Temperature Drop 18 to...

Page 20: ...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 ComfortSense 7000 thermostat homeowner manual for instructions on how to operate your thermostat Heat Pump Operation Your new Lennox heat pump has several characteristics tha...

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