Table of Contents
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Service Literature
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
INSTALLATION AND SERVICE
PROCEDURE
Corp. 0721-L7
Revised April 7, 2017
XP14 (HFC-410A) SERIES UNITS
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The XP14 is a high efficiency residential split-system heat
pump unit, which features a scroll compressor and
HFC-410A refrigerant. XP14 units are available in sizes
ranging from 1-1/2 through 5 tons. The series is designed
for use with an indoor unit with an check expansion valve
approved for HFC-410A.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox XP14 Engineering Handbook.
Coils previously charged with HCFC-22 must be
flushed.
XP14
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Related Manuals for Lennox XP14-018-230-06
Summary of Contents for Lennox XP14-018-230-06
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Page 1: Table Of Contents
(CFCs, HCFCs and HFCs) as of July 1, 1992. This unit must be matched with an indoor coil as Approved methods of recovery, recycling or reclaiming specified in Lennox XP14 Engineering Handbook. must be followed. Fines and/or incarceration may be Coils previously charged with HCFC-22 must be levied for noncompliance. -
Page 2: Model Number Identification
Model Number Identification − − −0 P 14 XXX Refrigerant Type Minor Revision Number X = HFC-410A Voltage 230 = 208/230V-1ph-60hz Unit Type P = Heat Pump Outdoor Unit Nominal Cooling Capacity 018 = 1.5 tons 024 = 2 tons Series 030 = 2.5 tons 036 = 3 tons... - Page 3 Unit Outdoor Fan Model Number Sound Rating Number Factory Refrigerant Number of Blades Diameter - inches. (dB) Charge XP14-036-230-01, -02, -08, -09 9 lbs. 12 oz. 9 lbs. 12 oz. or XP14-036-230-10 9 lbs. 6 oz. Tested according to AHRI Standard 270-2008 test conditions. Refrigerant charge sufficient for 15 feet of line set.
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Page 4: Electrical Data
1.0, 2.0 & XP14-018-230-01 11.9 8.97 48.0 1/10 1075 XP14-018-230-02 11.9 8.97 48.0 1/10 1075 XP14-018-230-03 11.9 8.97 48.0 1/10 1075 XP14-018-230-06 11.9 8.97 48.0 1/10 1075 11.9 8.97 48.0 1/10 1075 12.3 9.00 48.0 1/10 1075 XP14-018-230-07 12.2 9.00 48.0... - Page 5 208/230V-60 Hz-1 Ph Unit Compressor Condenser Fan Maximum Rated Locked Locked Over- Minimum Full Load Model Number Label Rev. Load Rotor Nominal Rotor current Circuity Motor HP Amps Amps Amps Amps Protection Ampacity (FLA) (RLA) (LRA) (LRA) (amps) 1.0, 2.0 & XP14-030-230-01 17.0 13.1...
- Page 6 208/230V-60 Hz-1 Ph Unit Compressor Condenser Fan Maximum Rated Locked Locked Over- Minimum Full Load Model Number Label Rev. Load Rotor Nominal Rotor current Circuity Motor HP Amps Amps Amps Amps Protection Ampacity (FLA) (RLA) (LRA) (LRA) (amps) 1.0, 2.0 & XP14-048-230-01 29.0 21.79...
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Page 7: Unit Dimensions
Unit Dimensions - Inches (mm) LIQUID LINE CONNECTION ELECTRICAL INLETS SUCTION LINE CONNECTION 4-3/4” 4-1/2” (121) (108) TOP VIEW SIDE VIEW Table 1. XP14-XXX-230-01 through 07 Model Number XP14-018-230 31 (787) XP14-024-230 31 (787) 27 (686) 28 (711) XP14-030-230 35 (889) XP14-036-230 31 (787) XP14-042-230... -
Page 8: Unit Parts Arrangement
Typical Unit Parts Arrangement CAPACITOR (C12) CONTROL PANEL CONTACTOR-1POLE (K1-1) GROUND LUG AMBIENT SENSOR (RT13) DEFROST CONTROL (A108) COIL TEMPERATURE COMPRESSOR SENSOR (RT21) - 6TH (B1) COMPRESSOR HARNESS HAIRPIN UP ON INSIDE ROW. CONNECTION CHECK EXPANSION VALVE MUFFLER 5-TON UNIT EXAMPLED HERE LIQUID LINE FILTER DRIER (BI-FLOW) CRANKCASE HEATER... -
Page 9: Control Panel
CONTROL PANEL CAPACITOR (C12) CONTACTOR- DEFROST CONTROL 1POLE (K1-1) (CMC1) THERMAL PROTECTION SWITCH (S173) GROUND SWITCH COVER ONLY ON UNITS USING EXTERNAL SWITCH COMPRESSOR MUFFLER 5-TON UNIT EXAMPLED HERE DEFROST TRUE SUCTION THERMOSTAT (S6) PORT CHECK EXPANSION VALVE REVERSING VALVE LIQUID LINE FILTER REVERSING VALVE DRIER (BI-FLOW) -
Page 10: Operating Gauge Set And Service Valves
Using an Allen wrench rated at less than 50Rc risks rounding or breaking off the wrench, or stripping the valve stem recess. See the Lennox Service and Application Notes #C-08-1 for further details and information. Page 10... -
Page 11: Service Valves
SERVICE VALVES ANGLE AND BALL Operating Angle Type Service Valve: 1. Remove stem cap with an appropriately sized wrench. 2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16” for vapor line valve sizes) to back the stem out counterclockwise as far as it will go. -
Page 12: Recovering Refrigerant From System
Recovering Refrigerant from System DISCONNECT POWER CONNECT MANIFOLD GAUGE SET Disconnect all power to the existing outdoor unit at the disconnect Connect a gauge set, clean recovery cylinder and a recovery switch or main fuse box/breaker panel. machine to the service ports of the existing unit. Use the instructions provided with the recovery machine to make the connections. -
Page 13: Unit Placement
Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í Í NOTES: See NOTES Í Í Í Í Í Í Í Í Í Í Í Í Í Service clearance of 30 in. - Page 14 DETAIL A — Outside Unit Placement DETAIL B — Slab Mounting at Ground Level Install unit away from windows. Install unit level or, if on a slope, maintain slope tolerance of two (2) degrees (or two inches per five feet [50 mm per 1.5 m]) away from building structure.
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Page 15: Removing And Installing Panels
STABILIZING UNIT ON UNEVEN SURFACES NOTICE IMPORTANT Roof Damage! Unit Stabilizer Bracket Use (field-provided): This system contains both refrigerant and oil. Some Always use stabilizers when unit is raised above the rubber roofing material may absorb oil and cause the factory height. - Page 16 LOUVERED PANEL REMOVAL IMPORTANT! DO NOT ALLOW PANELS TO HANG ON UNIT BY TOP TAB. TAB IS FOR Remove the louvered panels as follows: ALIGNMENT AND NOT DESIGNED TO SUPPORT WEIGHT OF PANEL. 1. Remove two screws, allowing the panel to swing open slight PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT (OR ENTER) TOP SLOT FOR REMOVING (OR INSTALLING) PANEL.
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Page 17: New Or Replacement Line Set
If new or replacement line assistance. set is not being installed then proceed to Brazing Connections on page 19. To obtain the correct information from Lennox, be sure to communicate the following information: IMPORTANT Model (XP14) and size of unit (e.g. -036). - Page 18 Line Set Isolation — The following illustrations are examples of proper refrigerant line set isolation: REFRIGERANT LINE SET — INSTALLING REFRIGERANT LINE SET — TRANSITION VERTICAL RUNS (NEW CONSTRUCTION SHOWN) FROM VERTICAL TO HORIZONTAL NOTE — Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line or when pressure drop is equal to or greater ANCHORED HEAVY NYLON...
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Page 19: Brazing Connections
Brazing Connections IMPORTANT Use the procedures outline in figures 9 and 10 for brazing Connect gauge set low pressure side to vapor line line set connections to service valves. service valve and repeat procedure starting at paragraph 4 for brazing the liquid line to service port WARNING valve. - Page 20 CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the suction / vapor and liquid line of the line.
- Page 21 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the suction / vapor valve stem port.
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Page 22: Flushing Line Set And Indoor Coil
Flushing Line Set and Indoor Coil TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE (UNCASED PROCEDURE (UNCASED COIL SHOWN) COIL SHOWN) STUB END TWO PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING VALVE... -
Page 23: Installing Indoor Metering Device
See the Lennox XP14 Engineering Handbook for of the expansion valve. Refer to below illustration for approved expansion valve kit match-ups. The expansion reference during installation of expansion valve unit. -
Page 24: Leak Test Line Set And Indoor Coil
Take care to empty all existing traps. Polyol ester (POE) oils are used in Lennox units charged with HFC-410A WARNING refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also Refrigerant can be harmful if it is inhaled. -
Page 25: Evacuating Line Set And Indoor Coil
Evacuating Line Set and Indoor Coil CONNECT GAUGE SET HIGH NOTE — Remove cores from service valves (if not already done). Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve Connect high side of manifold gauge OUTDOOR MANIFOLD set to liquid line service valve... -
Page 26: Electrical
temperatures and pressures present during operation of IMPORTANT an air conditioning system. Non-condensables and water suction combine with refrigerant to produce substances Use a thermocouple or thermistor electronic vacuum that corrode copper piping and compressor parts. gauge that is calibrated in microns. Use an instrument Electrical capable of accurately measuring down to 50 microns. -
Page 27: Servicing Units Void Of Charge
2. Inspect all factory- and field-installed wiring for loose Servicing Units Void of Charge connections. If the outdoor unit is void of refrigerant, clean the system 3. After evacuation is complete, open both the liquid and using the procedure described below. vapor line service valves to release the refrigerant 1. - Page 28 ADDING OR REMOVING REFRIGERANT This system uses HFC-410A refrigerant which operates at much higher pressures than HCFC-22. The pre-installed liquid line filter drier is approved for use with HFC-410A only. Do not replace it with components designed for use with HCFC-22. This unit is NOT approved for use with coils which use capillary tubes or fixed orifices as a refrigerant metering device.
- Page 29 WEIGH IN CHARGING METHOD CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE If the system is void of refrigerant, first, locate and repair any leaks and then weigh in the refrigerant charge into the unit. To calculate the total refriger ant charge: Additional charge specified per indoor Adjust amount.
- Page 30 Table 5. Unit Indoor Matchups for Subcooling (XP14-XXX-230-01 through 07) Target Target Target *Add *Add *Add Subcooling Subcooling Subcooling INDOOR MATCHUPS INDOOR MATCHUPS INDOOR MATCHUPS charge charge charge Heating Cooling Heating Cooling Heating Cooling (+5ºF) (+1ºF) (+5ºF) (+1ºF) (+5ºF) (+1ºF) XP14−018 XP14−030 (Continued) XP14−042 (Continued) CBX27UH-018/024 CH33-42B...
- Page 31 Table 6. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG* (XP14-XXX-230-01 through 07) IMPORTANT Use table 8 as a general guide when performing maintenance checks. This is not a procedure for charging the unit (Refer to Charging / Checking Charge section). Minor variations in these pressures may be expected due to differences in instal lations.
- Page 32 Table 7. Indoor Unit Matches, Targeted Subcooling, and Add Charge Values (XP14-XXX-230-08 or higher) Subcool Subcool Subcool Indoor Coil or Air Additional Indoor Coil or Air Additional Indoor Coil or Air Additional SIZE Handler Charge SIZE Handler Charge SIZE Handler Charge Heat Cool...
- Page 33 Table 8. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG (XP14-XXX-230-08 or higher) IMPORTANT Use table 8 as a general guide when performing maintenance checks. This is not a procedure for charging the unit (Refer to Charging / Checking Charge section). Minor variations in these pressures may be expected due to differences in instal lations.
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Page 34: System Operation (Xp14-Xxx-230-01 Through 07)
Note: The Y1 input must be active (ON) and the “O” room System Operation (XP14-XXX-230-01 thermostat terminal into board must be inactive. through 07) DIAGNOSTIC LEDS The demand defrost controller measures differential The state (Off, On, Flashing) of two LEDs on the defrost temperatures to detect when the system is performing board (DS1 [Red] and DS2 [Green]) indicate diagnostics poorly because of ice build-up on the outdoor coil. - Page 35 Table 10. Defrost Control Board Description (XP14-XXX-230-01 through 07) Description O Out 24 VAC output connection for reversing valve LO-PS Connection for low-pressure switch 24 VAC output for second stage compressor solenoid 24 VAC common output, switched for enabling compressor contactor HI-PS Connection for high-pressure switch Seven position square pin header.
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Page 36: Defrost System (Xp14-Xxx-230-01 Through 07)
Enter the TEST mode by placing a shunt (jumper) across Normal Mode—The demand defrost board monitors the the TEST pins on the board after power-up. The TEST O line, to determine the system operating mode pins are ignored and the test function is locked out if the (heat/cool), outdoor ambient... - Page 37 Table 12. Ambient (RT13) and Coil (RT21) Sensors Temperature / Resistance Range Degrees Degrees Degrees Degrees Resistance Resistance Resistance Resistance Fahrenheit Fahrenheit Fahrenheit Fahrenheit 136.3 2680 56.8 16657 21.6 44154 -11.3 123152 133.1 2859 56.0 16973 21.0 44851 -11.9 125787 130.1 3040 55.3...
- Page 38 TEST JUMPER Placing the jumper on the field test pins (E33) allows the technician to: Clear short cycle lockout Clear five-strike fault lockout Cycle the unit in and out of defrost mode Place the unit in defrost mode to clear the coil When Y1 is energized and 24V power is being applied to the Control, a test cycle can be initiated by placing a jumper on the Control's TEST pins for 2 to 5 seconds.
- Page 39 DEFROST BOARD DIAGNOSTICS (XP14-XXX-230-01 and later) See table 13 to determine defrost board operational conditions and to diagnose cause and solution to problems. Table 13. Defrost Control Board Diagnostic LEDs (XP14-XXX-230-01 through 07) Condition/Code Possible Cause(s) Solution Green Check control transformer power (24V). No power (24V) to board terminals R Power problem If power is available to board and LED(s) do not...
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Page 40: System Operation (Xp14-Xxx-230-08 And Later)
Bi-Flow Liquid Line Filter Drier System Operation (XP14-XXX-230-08 and The unit is equipped with a large-capacity biflow filter drier Later) which keeps the system clean and dry. If replacement is necessary, order another of the same design and capacity. IMPORTANT The replacement filter drier must be suitable for use with HFC-410A refrigerant. - Page 41 Compressor Delay (P5) factory‐connected to the defrost control's HI PS terminals (see figure 21). The defrost control also includes a low The defrost control has a field-selectable function to pressure, or loss‐of‐charge‐pressure, switch (S87). reduce occasional sounds that may occur while the unit is Switches are shown in wiring diagrams in figure 23.
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Page 42: Maintenance
Outdoor Coil (Sea Coast) — Moist air in ocean Maintenance locations can carry salt, which is corrosive to most Maintenance and service must be performed by a qualified metal. Units that are located near the ocean require installer or service agency. At the beginning of each frequent inspections and maintenance. -
Page 43: Unit Wiring Diagram And Sequence Of Operations
Unit Wiring Diagram and Sequence of Operations Figure 22. XP14 Unit Wiring Diagram (XP14-XXX-230-01 through 07) Page 43 XP14 SERIES... - Page 44 Figure 23. Typical Unit Wiring Diagram (XP14-XXX-230-08 and later) Page 44...
- Page 45 Figure 24. Typical Factory Wiring (Copeland Compressor) (XP14-XXX-230-08 and later) Page 45 XP14 SERIES...
- Page 46 Figure 25. Typical Factory Wiring (Interlink Compressor) (XP14-XXX-230-08 and later) Page 46...
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Page 47: Start-Up And Performance Checklist
SEQUENCE OF OPERATIONS FIRST STAGE HEAT: Internal thermostat wiring de-energizes terminal This is the sequence of operation for XP14 series units. heating mode selection, de-energizing the reversing valve The sequence is outlined by numbered steps which correspond to circled numbers on the adjacent diagram. The steps are identical for both cooling and first stage See steps 1, 2 and 3. - Page 48 Maintenance checks using the Normal Operating Pressures table Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa...
- Page 49 Maintenance checks using the Normal Operating Pressures table Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa...
- Page 50 Matchups/Charge Levels and Line Set Lengths Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for Table 2 may be used to help perform maintenance checks. This table is not a procedure for charg...