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BLD2024-0722_Manufacturer_Specifications_and_Installation_Instructions_5.30.2024_8.58.04_AM_4289563HEAT PUMP OUTDOOR UNITS LE-- NNOX RESIDENTIAL PROD UC T SPEC/FICA TONS MODEL NUMBER IDENTIFICATION ML17XP1 Product Tier ----- ------ ' ML = Merit® Series ' r-Nominal E iciency----------- ; Refrigerant Type - ------ ; X = R-410A ; , Unit Type ------ P = Heat Pump Outdoor Unit Cooling Stages -- 1 = Single Stage Compressor ML17XP1 Merit' Series R-410A - 60 Hz Bulletin No. 211007 January 2023 Supersedes September 2022 MERIT° SERIES LENNOX QUANTUM" COIL SEER2 up to 17.0 / SEER up to 18.6 HSPF2 up to 8.5 / HSPF up to 10.6 1.5to5Tons Cooling Capacity - 18,000 to 58,000 Btuh Heating Capacity - 16,200 to 54,500 Btuh -036- 230A01 ----------- Ratings Revision Level ----- Voltage 230 = 208/23OV-1 phase-601-lz - 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 FEATURE HIGHLIGHTS 1. Outdoor Coil Fan 2. Quantum`" Coil 3. Expansion Valve - Outdoor Unit 4. Four -Way Reversing Valve 5. High Capacity Liquid Line Drier 6. Scroll Compressor 7. Defrost Control 8. Heavy Gauge Steel Cabinet 9. Refrigerant Line Connections CONTENTS Approvals And Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Controls - Order Separately . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Dimensions- Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Features...........................................................3 FieldWiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Model Number Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Optional Accessories - Order Separately . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SoundData.........................................................9 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 TXV Substitution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TXVUsage.........................................................11 ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 2 APPROVALS AND WARRANTY APPROVALS • AHRI Certified to AHRI Standard 210/240-2023 • For AHRI Certified system match -ups and expanded ratings, visit www.LennoxPros.com • ENERGY STAR° certified • Sound rated to AHRI Standard 270-2008 test conditions • Tested in the Lennox Research Laboratory environmental test room • Rated according to U.S. Department of Energy (DOE) test procedures • Units and components UL, NEC, and CEC bonded for grounding to meet safety standards for servicing • ETL certified (U.S. and Canada) • ISO 9001 Registered Manufacturing Quality System WARRANTY • Compressor: • Limited five years in residential installations • Limited five years in non-residential installations • All other covered components: • Limited five years in residential installations • Limited one year in non-residential installations NOTE - Refer to Lennox° Basic Limited Warranty at www.Lennox.com for additional details. FEATURES APPLICATIONS • 1.5 through 5 ton • Sound levels as low as 74 dBA • Single phase power supply • Vertical air discharge • Applicable to indoor air handlers or gas furnaces with indoor add -on coils • Shipped completely factory assembled, piped, and wired • Factory tested operated NOTE - When heat pumps are used with gas furnaces, a dual -fuel compatible thermostat or a zone control system with dual -fuel capabilities must be used (order separately). NOTE - Installer must set heat pump, connect refrigerant lines, and make electrical connections to complete job. REFRIGERATION SYSTEM R-410A Refrigerant • Non -chlorine, ozone friendly • Unit is factory pre -charged NOTE -Total system refrigerant charge is dependent on outdoor unit size, indoor unit size and refrigerant line length. NOTE - Refer to the unit -mounted charging sticker to determine correct amount of charge required. 0 Outdoor Coil Fan • Direct drive fan • Vertical air discharge • Totally enclosed motor • PSC motor (018, 024, 030 and 036 models) • ECM motor (042, 048 and 060 models) • Louvered steel top fan guard AQuantum'"" Coil • Lennox designed and fabricated coil • Enhanced aluminum alloy tube/enhanced fin coil • Ripple -edged aluminum fins • Aluminum tube construction • Lanced fins for maximum fin surface exposure • Fin collars grip tubing for maximum contact area • Flared shoulder tubing connections • Factory tested under high pressure • Entire coil is accessible for cleaning High Pressure Switch • Protects the system from high pressure conditions that can be a result of fan failure or a blocked/dirty coil • Automatic reset Low Pressure Switch • Shuts off unit if suction pressure falls below setting • Provides loss of charge and freeze-up protection • Automatic reset ® Expansion Valve - Outdoor Unit • Designed and sized for heat pump systems • Sensing bulb senses evaporator suction temperature during heating cycle • Fan motor is inherently protected ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 3 FEATURES REFRIGERATION SYSTEM (continued) COMPRESSOR ® Four -Way Reversing Valve O Scroll Compressor • Rapid changeover of refrigerant flow direction from • High efficiency with uniform cooling to heating and vice versa suction flow • Operates on pressure differential between outdoor unit • Constant discharge flow, high and indoor unit of the system volumetric efficiency and quiet • Factory installed operation © High -Capacity Liquid Line Drier • Low gas pulses during compression reduces operational • Factory installed in the liquid line sound levels • Drier traps moisture or dirt 100% molecular -sieve, bead type, bi-flow drier Optional Accessories Check/Expansion Valve Kits • Field installed on certain indoor units • See TXV Usage table • Chatleff style fitting Freezestat • Installs on or near the vapor line of the indoor coil or on the suction line • Senses suction line temperature • Cycles compressor off when suction line temperature falls below it's setpoint • Opens at 297 and closes at 58T • Installs on or near the discharge line of the evaporator or on the suction line Refrigerant Line Kits • Refrigerant lines are shipped refrigeration clean • Lines are cleaned, dried, pressurized and sealed at factory • Suction line fully insulated • Lines are stubbed at both ends • Compressor motor is internally protected from excessive current and temperature • Compressor is installed in the unit on resilient rubber mounts for vibration free operation Scroll Compressor Operation • Two involute spiral scrolls matched together generate a series of crescent -shaped gas pockets between them • During compression, one scroll remains stationary while the other scroll orbits around it • Gas is drawn into the outer pocket, the pocket is sealed as the scroll rotates • As the spiral movement continues, gas pockets are pushed to the center of the scrolls. Volume between the pockets is simultaneously reduced • When the pocket reaches the center, gas is now at high pressure and is forced out of a port located in the center of the fixed scrolls • During compression, several pockets are compressed simultaneously resulting in a smooth continuous compression cycle • Continuous flank contact, maintained by centrifugal force, minimizes gas leakage and maximizes efficiency • Compressor is tolerant to the effects of slugging and contaminants. If this occurs, scrolls separate, allowing liquid or contaminants to be worked toward the center and discharged Compressor Crankcase Heater (Factory Installed on 036, 042, 048, 060) • Protects against refrigerant migration that can occur during low ambient operation Optional Accessories Crankcase Heater (Optional for 018, 024, 030 models) • Protects against refrigerant migration that can occur during low ambient operation Compressor Sound Cover • Reinforced vinyl compressor cover • 1-1/2 inch thick batt fiberglass insulation • Hook and loop fastening tape on all open edges ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 4 FEATURES CONTROLS ODefrost Control • Control furnished as standard • Gives a demand defrost cycle whenever system heating performance falls below optimum levels • Sensing element on coil determines when defrost cycle is required and when to terminate cycle • Anti -short cycle (5 minutes) incorporated into the board • Diagnostic LEDs furnished as an aid in troubleshooting Conveniently located in control box Optional Accessories M30 Smart Wi-Fi Thermostat • Wi-Fi-enabled, electronic 7-day, universal, multi -stage, programmable, touchscreen thermostat • 4 Heat/2 Cool • Auto -changeover • Dual -fuel control with optional outdoor sensor • Controls dehumidification during cooling mode and humidification during heating mode • Offers enhanced capabilities including humidification / dehumidification / dewpoint measurement and control, Humiditrol° control, and equipment maintenance reminders • Easy to read 4.3 in. color touchscreen (measured diagonally) • LCD display with backlight shows the current and set temperature, time, inside relative humidity, system status (operating mode and schedules) and outside temperature (optional outdoor sensor required) • Smooth Setback Recovery starts system early to achieve setpoint at start of program period • Compressor short -cycle protection (5 minutes) • Up to four separate schedules are available plus Schedule IQ'" • One -Touch Away Mode - A quick and easy way to set the cooling and heating setpoints while away • Smart Away"" - Uses geo-fencing technology to determine when the homeowner is within a predetermined distance from the home to operate the system when leaving, away and arriving • Wi-Fi remote monitoring and adjustment through a home wireless network for desktop PCs, laptops and apps for smartphones or tablets • Smart home automation compatible with Amazon Alexa°, Google Assistant and IFTTT • Service Dashboard features online real-time monitoring of installed Lennox° smart thermostats NOTE - See the Lennox® M30 Smart Wi-Fi Thermostat Product Specifications bulletin for more information. Remote Outdoor Temperature Sensor • Used with the Lennox° M30 Smart Wi-Fi Thermostat • Outdoor sensor allows thermostat to display outdoor temperature_,- NOTE - Sensor is required for the ,y Enhanced Dehumidification Accessory (FDA) applications. Thermostat • Thermostat is not furnished with unit • See Lennox Price Book for selection Compressor Hard Start Kit • Single-phase units are equipped with a PSC compressor motor • This type of motor normally doesn't need a potential relay and start capacitor • For conditions such as low voltage kit may be required to increase the compressor starting torque Compressor Low Ambient Cut -Off Switch • Non-adjustable switch (low ambient cut-out) prevents compressor operation when outdoor temperature is below 35°F • Freezestat Installs on or near the vapor line of the indoor coil or on the suction line • Senses suction line temperature and cycles the compressor off when suction line temperature falls below it's setpoint • Opens at 29°F and closes at 58°F Indoor Blower Off Delay Relay • Delays the indoor blower -off time during the cooling cycle Low Ambient Kit • Air conditioners can operate down to 45°F outdoor air temperature without additional controls • Allows unit to operate properly down to 30°F NOTE - Crankcase heater and freezestat should be installed on compressors equipped with a low ambient kit. NOTE - A Compressor Low Ambient Cut -Off should be added to terminate compressor operation below recommended operation conditions. Mild Weather Kit • Units can operate in the heating mode at outdoor air temperatures up to 75°F • Field installed kit allows heating operation above 75°F Monitor Kit - Service Light • Ambient compensating thermistor • Service light thermostat • For thermostats requiring indicator light inputs • For use with thermostats requiring input for indicator lights ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 5 FEATURES CONTROLS (continued) Optional Accessories (continued) Outdoor Thermostat Kit • An outdoor thermostat can be used to lock out some of the electric heating elements on indoor units where two - stage control is applicable • Outdoor thermostat maintains the heating load on the low power input as long as possible before allowing the full power load to come on the line • Thermostat kit and Mounting Box must be ordered separately CABINET • Heavy gauge steel construction • Louvered heavy gauge steel panels surround unit on all four sides • Five station metal wash process • Powder paint finish • Control box is conveniently located with all controls factory wired • Corner patch plate allows access to compressor components • Drainage holes are provided in base section for moisture removal PermaGuardTM Unit Base • Durable zinc -coated base section resists rust and corrosion ORefrigerant Line Connections, Electrical Inlets, Service Valves • Sweat connection suction and liquid lines • Located on corner of unit cabinet • Suction valve can be fully shut off, while liquid valve may be front seated to manage refrigerant charge while servicing system • Refrigerant line connections and field wiring inlets are located in one central area of the cabinet • See dimension drawing Optional Accessories Unit Stand -Off Kit • Black high density polyethylene feet • Raises unit off of mounting surface • Four feet are furnished per order number ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 6 SPECIFICATIONS General Model No. Data Nominal Tonnage ML17XP1-018 ML17XP1-024 ML17XP1-030 ML17XP1-036 1.5 2 2.5 3 Connections Liquid line OD - in. (sweat) Vapor (Suction) line OD - in. 3/8 3/8 3/8 3/8 3/4 3/4 3/4 7/8 ' Refrigerant R-410A charge furnished 6 lbs. 2 oz. 6 lbs. 0 oz. 7 lbs. 5 oz. 8 lbs. 9 oz. Outdoor Net face area - sq. ft. Outer coil Coil Inner coil 24.5 24.5 18.7 22.2 - - - - - - 18.0 21.5 Tube diameter - in. No. of rows Fins per inch 5/16 5/16 5/16 5/16 1 1 2 2 22 22 22 22 Outdoor Diameter - in. Fan No. of blades Motor hp Cfm Rpm Watts 22 22 22 26 2 2 2 3 1/8 1/8 1/6 1/5 2840 2840 2670 3590 825 825 825 825 127 127 162 200 Shipping Data - lbs. 1 pkg. 185 185 185 220 ELECTRICAL DATA Line voltage data - 60 Hz - 1 ph 208/23OV-1 ph 208/23OV-1 ph 208/23OV-1 ph 208/23OV-1 ph s Maximum overcurrent protection (MOCP) amps 20 25 25 30 ° Minimum circuit ampacity (MCA) 13.6 15.1 15.6 17.8 Compressor Rated load amps Locked rotor amps 10.3 11.5 11.7 13.1 45.7 59.5 71.3 83.1 Outdoor Fan Motor Full load amps 0.7 0.7 1.0 1.4 CONTROLS - ORDER SEPARATELY M30 Smart Wi-Fi Thermostat 15Z69 Remote Outdoor Temperature Sensor X2658 OPTIONAL ACCESSORIES - ORDER SEPARATELY Compressor Crankcase Heater 93M04 Compressor Hard Start Kit LG 88M91 Copeland 1OJ42 Compressor Sound Cover 18J42 Compressor Low Ambient Cut -Off 45F08 Freezestat 3/8 in. tubing 93G35 5/8 in. tubing 5OA93 Indoor Blower Off Delay Relay 58M81 5 Low Ambient Kit 54M89 Mild Weather Kit 1111397 Monitor Kit - Service Light 76F53 Outdoor Thermostat 1OZ23 Thermostat Kit Mounting Box 31461 Refrigerant 3/8 x 3/4 x 3/8 - 20 ft. 89J56 Line Sets 3/8 x 3/4 x 3/8 - 30 ft. 89,1157 (Liq. x Suc. OD 3/8 x 3/4 x 3/8 - 40 ft. 89J58 x Insulation 3/8 x 3/4 x 3/8 - 50 ft. 89J59 Thickness - Length) 3/8 x 7/8 x 3/8 - 30 ft. 89J60 3/8 x 7/8 x 3/8 - 40 ft. 89J61 3/8 x 7/8 x 3/8 - 50 ft. 89J62 Unit Stand -Off Kit 94J45 NOTE - Extremes of operating range are plus 10% and minus 5% of line voltage. Refrigerant charge sufficient for 15 ft. length of refrigerant lines. For longer line set requirements see the Installation Instructions for information about line set length and additional refrigerant charge required. HACR type breaker or fuse. a Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Crankcase Heater and Freezestat are recommended with Low Ambient Kit. ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 7 SPECIFICATIONS General Model No. Data Nominal Tonnage ML17XP1-042 ML17XP1-048 ML17XP1-060 3.5 4 5 Connections Liquid line OD - in. (sweat) Vapor (Suction) line OD - in. 3/8 3/8 3/8 7/8 7/8 1-1/8 Refrigerant R-410A charge furnished 10 lbs. 2 oz. 9 lbs. 2 oz. 10 lbs. 4 oz. Outdoor Net face area- sq. ft. Outer coil Coil Inner coil 24.93 24.93 29.09 24.13 24.13 28.16 Tube diameter - in. No. of rows Fins per inch 5/16 5/16 5/16 2 2 2 22 22 22 Outdoor Diameter - in. Fan No. of blades Motor hp Cfm Rpm Watts 26 26 26 3 3 3 1/3 1/3 1/3 4110 4110 4060 825 825 825 213 213 224 Shipping Data - lbs. 1 pkg. 250 250 260 ELECTRICAL DATA Line voltage data - 60 Hz -1 ph 208/23OV-1 ph 208/23OV-1 ph 208/230V-1 ph 2 Maximum overcurrent protection (MOCP) amps 40 50 50 3 Minimum circuit ampacity (MCA) 25.9 33.9 32.5 Compressor Rated load amps Locked rotor amps 18.6 25 23.9 110 120 124.5 Outdoor Fan Motor Full load amps 2.4 - 2.6 2.4 - 2.6 2.4 - 2.6 CONTROLS - ORDER SEPARATELY M30 Smart Wi-Fi Thermostat 15Z69 Remote Outdoor Temperature Sensor X2658 OPTIONAL ACCESSORIES - ORDER SEPARATELY Compressor Hard Start Kit Copeland 88M91 LG 1OJ42 Compressor Sound Cover 118,142 Compressor Low Ambient Cut -Off 45F08 Freezestat 3/8 in. tubing 93G35 5/8 in. tubing 5OA93 Indoor Blower Off Delay Relay 58M81 4 Low Ambient Kit 54M89 Mild Weather Kit 111397 Monitor Kit - Service Light 76F53 Outdoor Thermostat 1OZ23 Thermostat Kit Mounting Box 31461 Refrigerant 3/8 x 7/8 x 3/8 - 30 ft. 89,160 Line Sets 3/8 x 7/8 x 3/8 - 40 ft. 89,161 (Liq. x Suc. OD 3/8 x 7/8 x 3/8 - 50 ft. 89,162 x Insulation 3/8 x 1-1/8 x 3/8 - 30 ft. X0570 Thickness - Length) 3/8 x 1-1/8 x 3/8 - 50 ft. 731391 Unit Stand -Off Kit 94,145 NOTE -Extremes of operating range are plus 10% and minus 5% of line voltage. Refrigerant charge sufficient for 15 ft. length of refrigerant lines. For longer line set requirements see the Installation Instructions for information about line set length and additional refrigerant charge required. HACR type breaker or fuse. a Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Crankcase Heater and Freezestat are recommended with Low Ambient Kit. ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 8 SOUND DATA ' Model Octave Band Sound Power Levels dBA, re 10-12 Watts Center Frequency - HZ 1 Sound Rating Number (dBA) 2 Estimated Sound Pressure Level at Distance From Unit (dBA at distance in ft.) 125 250 500 1000 2000 4000 8000 3 5 10 15 50 018 56.5 62 68.0 71.5 66.0 57.0 50 74 67 62 56 53 42 024 56.0 62 66.5 71.0 66 60 55.0 74 67 62 56 53 42 030 56.0 64 69.5 70.0 65 59 52.5 74 67 62 56 53 42 036 59 68 71.5 68.5 66 61 54 75 68 63 57 54 43 042 62 71.0 74.5 72.5 70 63 55.5 78 71 66 60 57 46 048 61 70.5 75.5 73.0 70 64 56.0 79 72 67 61 58 47 060 61.5 70.0 73.0 71 71 68 63 79 73 68 62 59 48 NOTE - the octave sound power data does not include tonal correction. Tested according to AHRI Standard 270-2008 test conditions. 2 Estimated sound pressure level at distance based on AHRI Standard 275-2010 method for equipment located on the ground, roof, or on side of building wall with no adjacent reflective surface within 9.8 feet. Sound pressure levels will increase based on changes to assumptions. For other applications, refer to AHRI Standard 275. FIELD WIRING A - Two Wire Power (see Electrical Data) B - Two or Three Wire Power (size to heater capacity) C - Twelve Wire Low Voltage 18 ga. minimum Fourteen Wire Low Voltage with Optional Outdoor Thermostat D - Eight Wire Low Voltage 18 ga. minimum Ten Wire Low Voltage with Optional Outdoor Thermostat NOTE - Field Wiring Not Furnished All wiring must conform to NEC or CEC and local electrical codes. INSTALLATION CLEARANCES NOTES: Service clearance of 30 in. (762 mm) must be maintained on one of the sides adjacent to the control box. Clearance to one of the other three sides must be 36 in. (914 mm) Clearance to one of the remaining two sides may be 12 in (305 mm) and the final side may be 6 in. (152 mm). A clearance of 24 in. must be maintained between two units. 48 in. (1219 mm) clearance required on top of unit. FDISCONNECTI SWITCH I I (By Others) I F OPTIONAL I I OUTDOOR I THERMOSTAT LENNOX OUTDOOR UNIT F See NOTE I OPTIONAL ELECTRIC HEAT - J ---- LENNOX INDOOR UNIT See NOTES rDISCONNECTI SWITCH By Others) rTHERMOSTAT, I (Optional) :S T CONTROL See NOTES BOX ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 9 DIMENSIONS - UNIT INLET AIR INLET lzu, AIR INLET 4 AIR TOP VIEW SIDE VIEW 4-3/8 4-3/8 (111) 1.*— _� (111) 4-3/8 OPTIONAL UNIT INLET STAND-OFF KIT (4) C MPRESS R (Field Installed) AIR COIL DRAIN OUTLETS (Around perimeter of base) / .SUCTION LINE (162) \ CONNECTION (162) o LIQUID LINE CONNECTION 6-3/8 4-3/8 (162) (111) TOP VIEW BASE SECTION 2 (51) 3/4 (19) ELECTRICAL INLETS A No OUTDOOR t DISCHARGE AIR COIL F COMPRESS SUCTION A LIQUID LI CONNECTI 2 OPTIONAL UNIT SIDE VIEW STANDOFF KIT (4) (FIELD INSTALLED) Model A B C in. mm in. mm in. mm 018 28-1/4 718 43-1/4 1099 42-1/2 1080 024 28-1/4 718 43-1/4 1099 42-1/2 1080 030 28-1/4 718 33-1/4 845 32-1/2 826 036 32-1/4 817 33-1/4 845 32-1/2 826 042 32-1/4 817 37-1/4 946 36-1/2 927 048 32-1/4 817 37-1/4 946 36-1/2 927 060 32-1/4 817 43-1/4 1099 42-1/2 1080 4-3/8 (111) 4-3/8 (111) ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 10 TXV USAGE Use this table for C35, CH23 and CR33 Field Installed TXV Match -Ups Model Order No. 018 12J18 024 12J18 030 12J18 036 12J19 042 12J20 048 12J20 060 12.120 CX35 and CHX35 coils and all Lennox air handlers are shipped with a factory installed TXV. C35 coils - Replace the factory installed RFC orifice with the expansion valve listed. CH23 and CR33 - Use the expansion valve listed. AHRI STANDARD 210/240-2023 Standard Ratings relating to cooling or heating capacities shall be net values, including the effects of circulating -fan heat, but not including supplementary electric heat. Power input used for calculating efficiency shall be the Total Power. Standard Ratings of units which do not have indoor air - circulating fans furnished as part of the model, i.e., Coil - only System, shall be established by subtracting from the total cooling capacity 1,505 Btu/h per 1,000 SCFM, and by adding the same amount to the heating capacity for non - mobile -home, non -Space Constrained units. Total Power for both heating and cooling shall be increased by 441 W per 1,000 SCFM of indoor air circulated. TXV SUBSTITUTION A general guide for replacing the factory installed TXV if the indoor unit (coil/air handler) is larger or smaller than the outdoor unit. Outdoor Unit Indoor Unit TXV Furnished TXV Replacement Size Tons Size Tons 018 1.5 30/36 2.5/3 12J19 12J18 018 1.5 36 3 12J19 12,118 018 1.5 42 3.5 12J20 12J18 018 1.5 48 4 12.120 12J18 018 1.5 49 4 12J20 12J18 018 1.5 50/60 4/5 12J20 12J18 018 1.5 51/61 4/5 12J20 12J18 018 1.5 60 5 12J20 12J18 024 2 42 3.5 12J20 12J18 024 2 48 4 12J20 12J18 024 2 49 4 12J20 12J18 024 2 50/60 5 12.120 12J18 024 2 51/61 5 12.120 12J18 024 2 60 5 12.120 12J18 030 2.5 42 3.5 12.120 12.118 030 2.5 43 3.5 12.120 12J18 030 2.5 48 4 12J20 12J18 030 2.5 49 4 12J20 12J18 036 3 24 2 12J18 12J19 036 3 30 2.5 12J18 12J19 042 3.5 24 2 12,118 12J20 042 3.5 30 2.5 12J18 12.120 042 3.5 30/36 3 12J19 12.120 042 3.5 36 3 12J19 12.120 048 4 30/36 2.5/3 12J19 12.120 048 4 36 3 12J19 12.120 TXV Ranges: 12J18 - 1.5 to 2.5 ton systems - Use on 2.5 ton (030) and lower systems. 12J19 - 3 ton systems - Use down to 2 ton (024) systems. 12J20 - 3.5 to 5 ton systems - Use down to 3 ton (036) systems. ML17XP1 - 1.5 to 5 Ton Heat Pump / Page 11 REVISIONS Section Optional Accessories Description Updated Line Sets available. CM q*W* H H" C VV ,/MfMBfR COMPANY 10STE10 Intertek Visit us at www.Lennox.com For the latest technical information, www.LennoxPros.com LENN,76D Contact us at 1-800-9-LENNOX NOTE - Due to Lennox' ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability. Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury. Installation and service must be performed by a qualified installer and servicing agency. ©2023 Lennox Industries, Inc.