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Lenox 50677201 - page 1
08/1 1 506772−01 *2P0811* *P506772-01* Page 1 201 1 Lennox Industries Inc. Dallas, T exas, USA RET AIN THESE INSTRUCTIONS FOR FUTURE REFERENCE These instructions are intended as a general guide and do not supersede local codes in any way . Consult authorities having jurisdiction before inst allation. W ARNING Improper installation, adjustment ...
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Lenox 50677201 - page 2
Page 2 506728−01 Model Number Identification P 14 036 − − Unit T ype P = Heat Pump Outdoor Unit Series Nominal Cooling Capacity 018 = 1.5 tons 024 = 2 tons 030 = 2.5 tons 036 = 3 tons 042 = 3.5 tons 048 = 4 tons 060 = 5 tons Minor Revision Number 230 V olt age 230 = 208/230V−1ph−60hz Refrigerant T ype X = HFC−410A X 08 − Unit Dimensio ...
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Lenox 50677201 - page 3
Page 3 XP14 SERIES T ypical Unit Parts Arrangement LIQUID LINE FIL TER DRIER (BI−FLOW) FIELD CONNECTION FOR LIQUID LINE SET LIQUID LINE SER VICE V AL VE REVERSING VA LV E FIELD CONNECTION FOR V APOR LINE (BALL−TYPE −060 ONL Y) HIGH PRESSURE SWITCH (AUTO−RESET) (S4) GROUND LUG CONT ACT OR− 1POLE (K1−1) CAP ACIT OR (C12) CONTROL P ANEL PL ...
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Lenox 50677201 - page 4
Page 4 506728−01 Caps and Fasteners T orque Requirements When servicing or repairing HV AC equipment and component s, ensure the fasteners are appropriately tightened. T able 1 list torque values for various caps and fasteners. T able 1. T orque Re quire ment s Part s Recommended Tor que Service valve cap 8 ft.− lb. 11 N M Sheet metal screws 16 ...
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Lenox 50677201 - page 5
Page 5 XP14 SERIES T o Access Service Po rt: A service port cap protect s the service port core from contamination and serves as the primary leak seal. 1. Remove service port cap wi th an appropr iately siz ed wrench. 2 . Connect gauge set to serv ice port. 3 . W hen t est ing is c om pleted, replace service port cap a nd tighten as follows: Wi ...
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Lenox 50677201 - page 6
Page 6 506728−01 Recovering Refrigerant from Existing System Disconnect all power to the existing outdoor unit at the disconnect switch and/or main fuse box/breaker panel. DISCONNECT POWER CONNECT MANIFOLD GAUGE SET MANIFOLD GAUGES RECOVER Y MACHINE CLEAN RECOVERY CYLINDER OUTDOOR UNIT HIGH LOW Connect a manifold gauge set, clean recovery cylinde ...
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Lenox 50677201 - page 7
Page 7 XP14 SERIES New Out door Unit Placement CAUTION In order to avoid injury , take proper precaution when lif t - ing heavy object s. Remove existing out door unit prior to placement of new outdoor unit. See Unit Dimensions on p age 2 for sizing mounting slab, plat forms or support s. Refer to figure 5 for mandatory installation clearance requi ...
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Lenox 50677201 - page 8
Page 8 506728−01 LEG DET AIL BASE 2" (50.8MM) SCH 40 FEMALE THREADED ADAPTER Concrete slab use two plastic anchors (hole drill 1/4") W ood or plastic slab no plastic anchor (hole drill 1/8") COIL BASE P AN CORNER POST ST ABILIZING BRACKET (18 GAUGE MET AL 2" WIDTH; HEIGHT AS REQUIRED) Slab Side Mounting #10 1/2 ...
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Lenox 50677201 - page 9
Page 9 XP14 SERIES Removing and Installing Panels LOUVERED P ANEL REMOV AL Remove the louvered panels as follows: 1. Remove two screws, allowing the panel to swing open slightly . 2. Hold the panel firmly throughout this procedure. Rotate bottom corner of panel away from hinged corner post until lower three tabs clear the slots as illustrated in de ...
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Lenox 50677201 - page 10
Page 10 506728−01 Line Set Requirements This section provides information on: inst allation of new or replacement line set. Adding Polyol ester oil requirements New or replacement line set installation Using existing line set. ADDING POL YOL ESTER OIL REQUIREMENTS IMPORT ANT Mineral oils are not compatible with HFC−410A . If oil mus ...
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Lenox 50677201 - page 11
Page 1 1 XP14 SERIES ANCHORED HEA VY NYLON WIRE TIE OR AUT OMOTIVE MUFFLER-TYPE HANGER STRAP LIQUID LINE TO V APOR LINE W ALL STUD LIQUID LINE NON−CORROSIVE MET AL SLEEVE V APOR LINE − WRAPPED IN ARMAFLEX AUT OMOTIVE MUFFLER-TYPE HANGER REFRIGERANT LINE SET TRANSITION FROM VERTICAL TO HORIZONT AL Line Set Isolation The following illustr ...
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Lenox 50677201 - page 12
Page 12 506728−01 Brazing Connections Use the procedures outline in figures 9 and 10 for brazing line set connections to service valves. W ARNING Polyol Ester (POE) oils used with HF C−410A refr igerant absorb moistur e very qui ckly . It is very important that the refrigerant sy stem be kept closed as much as possibl e. DO NOT remove line set ...
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Lenox 50677201 - page 13
Page 13 XP14 SERIES A TT ACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION / V APOR LINE SERVICE V AL VES OUTDOOR UNIT LIQUID LINE V APOR LINE LIQUID LINE SERVICE VA LV E SUCTION / V APOR LINE SER VICE VA LV E A TTACH GAUGES INDOOR UNIT SUCTION / V APOR SER VICE PORT MUST BE OPEN TO ALLOW EXIT POINT FOR NITROGEN A Connect gauge set low pres ...
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Lenox 50677201 - page 14
Page 14 506728−01 WHEN BRAZING LINE SET TO SER VICE V A L VES, POINT FLAME A W A Y FROM SER VICE V AL VE. LIQUID LINE SERVICE V AL VE LIQUID LINE BRAZE LINE SET W rap both service valves with water saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set . Water saturated cloths must remain water saturated throu ...
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Lenox 50677201 - page 15
Page 15 XP14 SERIES Indoor Refrigerant Metering Device Removal and Flushing Line Set and Indoor Coil Flushing is only required when the existing system used HCFC−22 refrigerant. If the existing system used HFC−410a, then remove the original indoor coil metering device and proceed to Installing New Indoor Metering Device on page 16 . SENSING LIN ...
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Lenox 50677201 - page 16
Page 16 506728−01 Installing New Indoor Metering Device This out door unit is designed for use in HFC−410A systems that use a check / exp ansion valve metering device (purchased sep arately) at the indoor coil. See t he Lennox XP14 Engineering Handbook fo r ap p r o v e d ch e c k / exp a n s i o n val v e ki t ma t c h − u p s . The check / ...
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Lenox 50677201 - page 17
Page 17 XP14 SERIES Leak T est Line Set and Indoor Coil IMPORT ANT Leak detector must be cap able of sensing HFC refrigerant . TO V APOR SER VICE V AL VE (ANGLE OR BALL TYPE) HFC−410A MANIFOLD GAUGE SET OUTDOOR UNIT HIGH LOW NITROGEN A Connect an HFC−410A manifold gauge set high pressure hose to the vapor valve service port. NOTE Normally , ...
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Lenox 50677201 - page 18
Page 18 506728−01 Evacuating Line Set and Indoor Coil Evacuating the system of non−condensables is critical for proper operation of the unit. Non−condensables are defined as any gas that will not condense under temperatures and pressures present during operation of an air conditioning system. Non−condensables and water suction combine with ...
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Lenox 50677201 - page 19
Page 19 XP14 SERIES IMPORT ANT Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an instrument capable of accurately measuring down to 50 microns. W ARNING Danger of Equipment Damage. A void deep vacuum operation. Do not use compressor s to evacuat e a system. Extremely low vacuums can cause internal arcing ...
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Lenox 50677201 - page 20
Page 20 506728−01 Figure 15. T ypical Unit Wiring Diagram ...
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Lenox 50677201 - page 21
Page 21 XP14 SERIES Figure 16. T ypical Factory Wiring (Copeland Compressor) ...
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Lenox 50677201 - page 22
Page 22 506728−01 Figure 17. T ypical Factory Wiring (Interlink Compressor) ...
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Lenox 50677201 - page 23
Page 23 XP14 SERIES W ARNING Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes. Line voltage is present at all component s when unit is not in operation on units w ith single-pole cont actors. Disconnect all remote electric power supplies before opening access panel. Unit may have mu ...
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Lenox 50677201 - page 24
Page 24 506728−01 3. Inspect all factory− and field−inst alled wiring for loose connections. 4. Open the high side manifold gauge valve and weigh in liquid refrigerant. Use figure 20 to calculate the correct weigh−in charge. 5. Close manifold gauge valves. 6. Monitor the system to determine the amount of moisture remaining in the oil. It ma ...
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Lenox 50677201 - page 25
Page 25 XP14 SERIES NOTE − Use gauge ports on vapor line valve and liquid valve for evacuating refrigerant lines and indoor coil. Use true suction port to measure vapor pressure during charging. OUTDOOR COIL CHECK / EXP ANSION VA LV E BI−FLOW FIL TER / DRIER COMPRESSOR REVERSING V AL VE MUFFLER NOTE − ARROWS INDICA TE DIRECTION OF REFRIGERANT ...
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Lenox 50677201 - page 26
Page 26 506728−01 1. Determine the desired D T Measure entering air temper- ature using dry bulb ( A ) and wet bulb ( B ). D T is the intersect- ing value of A and B in the t able (see triangle). 2. Find temperature drop across coil Measure the coil’s dry bulb entering and leaving air temperatures ( A and C ). T em- perature Drop Formula: ...
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Lenox 50677201 - page 27
Page 27 XP14 SERIES APPROVED MA TCHED SYSTEM COMPONENTS, T ARGETED SUBCOOLING (SC) V ALUES AND ADD CHARGE V ALUES Listed below are the approved matched system component s (air handlers and indoor coils), targeted subcooling and add charge values for the XP14. This information is also listed on the unit charging sticker located on the out door unit ...
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Lenox 50677201 - page 28
Page 28 506728−01 T able 5. Indoor Unit Matches, T argeted Subcooling, and Add Charge V alues OD Size Indoor Model # Subcool Additional Charge OD Size Indoor Model # Subcool Additional Charge OD Size Indoor Model # Subcool Additional Charge Heat Cool Heat Cool Heat Cool −018 CBX27UH−018 13 14 1 9 −030 CH33−43C 4 9 1 12 −042 CH33−60D 1 ...
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Lenox 50677201 - page 29
Page 29 XP14 SERIES auto−reset switch closes when the compressor casing temperature falls to 151−187°F (66°C−86°C), and the compressor is re−energized. This single−pole, single−throw (SPST) bi−met allic switch is wired in series with the 24V Y input signal to control compressor operation. Crankcase Thermostat (S40) (−036, −042, ...
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Lenox 50677201 - page 30
Page 30 506728−01 Pressure Switch Circuit The defrost control incorporates two pressure switch circuits. The high pressure switch (S4) is factory-connected to the defrost control’s HI PS terminals (see figure 24). The defrost control also includes a low pressure, or loss-of-charge-pressure, switch (S87). Switches are shown in wiring diagrams in ...
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Lenox 50677201 - page 31
Page 31 XP14 SERIES Outdoor Coil Th e out door unit must be properly maintained to ensure it s proper operation. Please cont act your dealer to schedule proper inspection and maintenance for your equipment. Make sure no obstructions restrict airflow to the outdoor unit. Grass clippings, leaves, or shrubs crowding the unit can cause the ...
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Lenox 50677201 - page 32
Page 32 506728−01 S tart−Up and Performance Checklist Job Name Job no. Date Job Location City S tate Installer City S tate Unit Model No. Serial No. Service T echnician Nameplate V olt age Rated Load Ampacity Compressor Amperage: Maximum Fuse or Circuit Breaker Electrical Connections T ight? Indoor Filter clean? Supply V oltage (Unit Of ...
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