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Nominal Capacities
1.5 - 5 Tons

14.5 SEER (Up To 15 SEER)

Compressor - 10-Years Limited*
Parts - 10-Years Limited*

LX Series 14.5 SEER R-410A Split-System Heat Pump (THJF)

     The LX Series THJF models are the outdoor part of a versatile heat pump system.  They are designed to be custom matched with one of our complete line of evaporator sections, each designed to serve a specific function.  Matching air handlers are available for upflow, downflow, and horizontal left or right applications to provide a complete system.  Alternately, add-on coils are available for use with modular air handlers or upflow, downflow, and horizontal furnaces.  Electric heaters and field installed accessories are also available as needed.  Most models offer combinations that achieve Federal Tax Credit efficiency levels.  All heat pump models are Hybrid Heat compatible (requires accessory kit or compatible thermostat).

Special Benefits
  • Small Footprint - The compact footprint is a perfect fit for any application.
  • Quality Condenser Coils - The coil is constructed of copper tubing and enhanced aluminum fins for increased performance.
  • Coil Protection - Coils are protected from damage by a slotted, stamped steel coil guard.
  • Protected Compressor¹ - Compressors are protected internally by a high pressure relief valve and a temperature sensor, and externally by the system high and low pressure switches.  A factory installed liquid line filter-drier further protects the compressor against moisture and debris.
  • Environmentally Friendly Refrigerant - The next generation refrigerant R-410A delivers environmentally friendly performance with zero ozone depletion.
  • Durable Finish - The cabinet is made of G90-equivalent galvanized steel, finished in a durable titanium colored powdercoat.  The coated steel wire fan guard and pre-treated, galvanized steel chassis components resist corrosion and rust creep.
  • Lower Installed Cost - Installation time and costs are reduced by easy power and control wiring connections.  The unit is factory charged for a 15-foot lineset.  The small base dimension means less space is required on the ground or roof.
  • Top Discharge - Warm air from the top mounted fan is blown up, away from the structure and any landscaping.  This allows compact location on multi-unit applications.
  • Quiet Operation - The compressor sound blanket and the swept wing fan blade keep sound to a minimum.  The upward air flow carries the normal operating noise away from the living area.  The rigid top panel effectively isolates any motor sound.  Isolator mounted compressor and the condenser coil muffle the normal fan motor and compressor operating sounds.
  • Low Maintenance - Long life, permanently lubricated motor-bearings need no annual servicing.
  • Easy Service Access - Fully exposed refrigerant connections and a single panel covering the electrical controls make for easy servicing of the unit.
  • Secured Service Valves - Secured, re-usable service valves are provided on both the liquid and vapor sweat connections for ease of evacuating and charging.
  • Advanced System Control - These heat pumps feature a demand-defrost control system to provide optimal comfort and reliable operation over a wide range of conditions.
  • Agency Listed - Safety certified by CSA to UL 1995 / CSA 22.2.  Performance certified to ANSI/AHRI Standard 210/240 in accordance with the Unitary Small Equipment certification program.

*Must be registered online within 90 days of installation to qualify for the 10-Years parts / 10-Years compressor limited warranty. Otherwise, the warranty reverts to the standard 5-Years parts / 10-Years compressor limited warranty as published in the product warranty certificate.  This warranty does not apply to R-22 models, 3-Phase models, or internet sales.  See the Limited Warranty certificate in the User's Information Manual for details.

Verify the actual ratings for each specific matchup in the online AHRI directory at www.ahridirectory.org at the time of sale.  It is also recommended to print the rating certificate, if needed, at the time of sale.

¹ The 5-ton system utilizes a two-stage compressor.

Publications and Manuals
DescriptionPart NumberFile Size
Consumer Brochures
Consumer Brochure - LX Series Spilt System Heat Pump (14.5 SEER)PUBL-6185-E-07121.4 MB PDF
Tech Guides
Technical Guide - THJF18-60, 1Ø R-410A Split System Heat Pump (14.5 SEER)560591-LTG-E-0114597.0 KB PDF
Technical Guide - THJF18-60, 1Ø R-410A Split System Heat Pump (14.5 SEER)560591-LTG-F-0914915.0 KB PDF
Tabular Data
Tabular Data Sheet - THJF018 - 060 R-410A Outdoor Split System Heat Pump (14.5 SEER)1175199-BTD-A-1014175.0 KB PDF
Tabular Data Sheet - THJF018 - 060 R-410A Outdoor Split System Heat Pump (14.5 SEER)1067083-BTD-B-0914186.0 KB PDF
Installation Instructions
Installation Manual - THG(D,F)/GHGD/THJ(D,F)/YHJ(D,F)/YHJR/THJR Series, R-410A 1Ø & 3Ø Split System Heat Pump (13 & 14.5 SEER)835961-UIM-H-0315601.0 KB PDF
Installation Manual - YHJF060/THJF060/THGF060, R410A 1Ø Split-System Heat Pump (14.5 SEER)835959-UIM-E-0315429.0 KB PDF
Accessory Installation Instructions
Installation Accessory - 1HK0201 Hurricane Kit035-24114-001-A-0514132.0 KB PDF
Installation Accessory - 2LA06700224 & 2LA06700424 Low Ambient/Pressure Kit513433-UAI-B-021495.0 KB PDF
Installation Accessory - 2SA067* Hard Start Kit for 13+ SEER Air Conditioners and Heat Pumps5006452-UAI-A-0215514.0 KB PDF
Installation Accessory - S1-33101975102 Repair Part Kit for Replacement Demand Defrost Control Board for use with 12, 13, & 14 SEER Heat Pumps035-21270-001-B-051070.0 KB PDF
Submittal Drawings
Submittal Data Sheet - THJF18* thru 60 1Ø R-410A Outdoor Split-System Heat Pump (14.5 SEER)560597-BSD-D-0613213.0 KB PDF
Repair Parts
Repair Parts - THJF Series 14.5 Seer Heat Pump, R-410A, Gen 3035-22752-001-G-0812623.0 KB PDF
REPAIR PARTS - THJF SERIES 14.5 SEER HEAT PUMPS, R-410A, GEN 5 (STYLE B)035-24181-001-A-1014432.0 KB PDF
THJF Series 14.5 Seer Heat Pumps, R-410A, 5th Generation (Style A)035-23421-001-B-1212635.0 KB PDF
THJF Seroes 14.5 Seer Heat Pump, R-410A, 4th Generation (Style A)035-23398-001-C-0914633.0 KB PDF
User Manuals
User Manual - 1Ø and 3Ø Split System Air Conditioner or Heat Pump Units813196-UUM-E-0314119.0 KB PDF
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