Air Conditioning and Heating Solutions | Lennox
Owner's Manual for LENNOX models including: CHX35-18A-6F, CHX35-61C-6F, CHX35-60D-6F, CHX35 1.5 to 5 Tons Indoor Coils, CHX35, CHX35 Indoor Coils, 1.5 to 5 Tons Indoor Coils, Indoor Coils, Coils
Condensate drain (fpt) (2) 3/4. (2) 3/4. (2) 3/4. (2) 3/4. (2) 3/4. (2) 3/4. (2) 3 ... 48C-6F CHX35-51/61C-6F CHX35-60D-6F. Dry. Coil. Wet. Coil. Dry. Coil. Wet.
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DocumentDocumentCHX35 Horizontal | Cased | TXV | R-410A COMMERCIAL PRODUCT SPECIFICATIONS (EHB) INDOOR COILS 1.5 to 5 Tons NOTE - These coils are sold in Canada for system installation and replacement! These coils are sold in the US for repair/replacement MODEL NUMBER IDENTIFICATION Unit Type CH = Indoor Coil, Horizontal CH X 35 - 18 A - 6 F 61 Minor Revision Number Refrigerant Type X = R-410A Cabinet F = Cased Series Nominal Cooling Capacity 18 = 1.5 tons 48 = 3.5/4 tons 24 = 2 tons 50 = 4 tons 30 = 2.5 tons 51/61 = 4/5 tons 36 = 3 tons 60 = 5 tons 42 = 3.5 tons Metering Device 6 = Factory installed Check/Expansion Valve for R-410A refrigerant (non-bleed port) 2 Cabinet Height A = 14-1/2 in. B = 17-1/2 in. C = 21 in. D = 24-1/2 in. 2 Furnaces with the same letter designation physically match the indoor coil. Form Number 211251 | March 2025 Supersedes all previous versions CONTENTS Air Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Approvals And Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Dimensions - Furnace/Coil Combined Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Model Number Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 APPROVALS AND WARRANTY APPROVALS · Tested with matching air conditioners and heat pump units in the Lennox Research Laboratory environmental test room in accordance with AHRI Standard 210/240 · AHRI Certified system match-ups and expanded ratings, visit www.LennoxPros.com · Air resistance tests from Lennox Laboratory air test chamber WARRANTY · 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 to 5 ton nominal sizes · Lennox designed horizontal indoor coils can easily be installed with most Lennox horizontal furnaces · Factory installed R-410A, check/expansion valve COIL CONSTRUCTION QuantumTM Coil · Lennox designed and fabricated coil · Aluminum tubing, hairpins, distributor and header tubes · Ripple-edged aluminum fins · Lanced fins provide maximum exposure of fin surface to air stream · Rifled tubing provides superior refrigerant heat transfer · Twin coil construction assembled in an "A" configuration for large surface area · Non-corrosive, UV-resistant polymer drain pan with dual fpt drain connections · High pressure testing insures leakproof construction Check/Expansion Valve · All models have a factory-installed, internal check/ expansion valve · For use with R-410A systems · Wide range valve · Chatleff style fitting · Expansion valves are externally-equalized, non-bleed port type CHX35 - 1.5 to 5 Ton Indoor Coils / Page 2 CABINET · Pre-painted heavy gauge steel · Insulated with thick fiberglass insulation · Flanges furnished for ease of duct connection · Engaging holes furnished for alignment with furnace · Removable panels provide access to coil · Refrigerant lines extend outside of cabinet for easy connection Furnace Match-Up · Coils exactly match corresponding furnaces with same letter designation in model number · No adaptor required · Engaging holes furnished for alignment Refrigerant Line Connections · Copper refrigerant sweat connections on both liquid and suction lines for easy brazing · Lines extend outside of the cabinet for ease of connection · See dimension drawings for locations Braze-Free/Press Fitting Flexibility · Units can accomodate braze-free or press fittings for installation versatility SPECIFICATIONS General Data Model No. Nominal size - tons Factory installed expansion valve Line connections Suction o.d. - sweat in. Liquid o.d. - sweat Condensate drain (fpt) Indoor Net face area sq. ft. Coil Tube diameter - in. Number of rows Fins per inch Matching Lennox Furnace - Cabinet Width Designation Coil & Furnace Cabinet Height - in. Shipping Data - lbs. CHX35 -18A-6F 1.5 12J18 7/8 3/8 (2) 3/4 3.5 3/8 2 19 A 14-1/2 44 CHX35 -24A-6F 2 12J18 7/8 3/8 (2) 3/4 3.5 3/8 3 13 A 14-1/2 46 CHX35 -24B-6F 2 12J18 7/8 3/8 (2) 3/4 4.67 3/8 2 19 B 17-1/2 50 CHX35 -30A-6F 2.5 12J18 7/8 3/8 (2) 3/4 4.33 3/8 3 16 A 14-1/2 56 CHX35 -30B-6F 2.5 12J18 7/8 3/8 (2) 3/4 4.67 3/8 3 13 B 17-1/2 54 1.5 TO 3 TON CHX35 -36A-6F 3 12J19 CHX35 -36B-6F 3 12J19 7/8 3/8 (2) 3/4 3.5 3/8 3 13 A 7/8 3/8 (2) 3/4 4.67 3/8 2 18 B 14-1/2 17-1/2 48 49 SPECIFICATIONS General Data Model No. Nominal size - Tons Factory installed expansion valve Line connections Suction o.d. - sweat in. Liquid o.d. - sweat Condensate drain (fpt) Indoor Net face area sq. ft. Coil Tube diameter - in. Number of rows Fins per inch Matching Lennox Furnace - Cabinet Width Designation Coil & Furnace Cabinet Height - in. Shipping Data - lbs. CHX35 -36C-6F 3 12J19 7/8 3/8 (2) 3/4 5.83 3/8 2 18 C 21 56 CHX35 -42B-6F 3.5 12J20 7/8 3/8 (2) 3/4 5.78 3/8 4 13 B 17-1/2 67 CHX35 -42C-6F 3.5 12J20 7/8 3/8 (2) 3/4 5.83 3/8 3 13 C 21 67 CHX35 -48B-6F 3.5/4 12J20 7/8 3/8 (2) 3/4 5.78 3/8 3 13 B 17-1/2 61 3 TO 5 TON CHX35 CHX35 CHX35 -48C-6F -51/61C-6F -60D-6F 3.5/4 4/5 5 12J20 12J20 12J20 7/8 7/8 7/8 3/8 3/8 3/8 (2) 3/4 (2) 3/4 (2) 3/4 5.83 7.22 7.94 3/8 3/8 3/8 3 3 3 13 13 13 C C D 21 21 24-1/2 60 70 79 AIR RESISTANCE Air Volume CHX35-18A-6F cfm Dry Wet Coil Coil 200 0.02 0.02 400 0.05 0.06 600 0.09 0.11 800 0.15 0.17 1000 0.22 0.25 1200 - - - - - - 1400 - - - - - - 1600 - - - - - - CHX35-24A-6F Dry Wet Coil Coil --- --0.04 0.05 0.09 0.11 0.15 0.19 0.23 0.29 0.32 0.40 0.43 0.50 --- --- Total Air Resistance - in. w.g. CHX35-24B-6F CHX35-30A-6F CHX35-30B-6F Dry Wet Dry Wet Dry Wet Coil Coil Coil Coil Coil Coil --- --- --- --- --- --0.03 0.04 0.04 0.05 0.02 0.02 0.05 0.07 0.09 0.10 0.05 0.06 0.09 0.11 0.15 0.17 0.09 0.11 0.15 0.17 0.24 0.27 0.14 0.16 0.21 0.23 0.34 0.38 0.19 0.23 0.28 0.30 0.45 0.51 0.26 0.30 --- --- --- --- --- --- CHX35-36A-6F Dry Wet Coil Coil --- ----- ----- --0.15 0.18 0.22 0.27 0.30 0.39 0.41 0.48 0.53 0.63 CHX35-36B-6F Dry Wet Coil Coil --- ----- ----- --0.08 0.10 0.11 0.16 0.16 0.21 0.21 0.27 0.27 0.35 AIR RESISTANCE Air Volume CHX35-36C-6F cfm Dry Wet Coil Coil 800 0.06 0.08 1000 0.10 0.13 1200 0.15 0.18 1400 0.19 0.23 1600 0.24 0.31 1800 - - - - - - 2000 - - - - - - 2200 - - - - - - 2400 - - - - - - CHX35-42B-6F Dry Wet Coil Coil 0.10 0.10 0.14 0.18 0.20 0.25 0.26 0.31 0.34 0.36 0.42 0.47 --- ----- ----- --- CHX35-42C-6F Dry Wet Coil Coil 0.06 0.06 0.09 0.10 0.15 0.16 0.18 0.21 0.26 0.28 0.31 0.38 --- ----- ----- --- CHX35-48B-6F Dry Wet Coil Coil --- --0.14 0.16 0.19 0.23 0.25 0.29 0.30 0.38 0.38 0.42 --- ----- ----- --- CHX35-48C-6F CHX35-51/61C-6F CHX35-60D-6F Dry Wet Dry Wet Dry Wet Coil Coil Coil Coil Coil Coil --- --- --- - - - --- --- --- --- --- - - - --- --- 0.16 0.19 0.15 0.16 - - - - - - 0.21 0.26 0.20 0.23 0.12 0.16 0.27 0.30 0.25 0.29 0.16 0.20 0.33 0.39 0.31 0.36 0.20 0.24 0.39 0.49 0.40 0.44 0.24 0.30 - - - - - - 0.48 0.54 0.29 0.36 --- --- --- - - - 0.34 0.42 CHX35 - 1.5 to 5 Ton Indoor Coils / Page 3 DIMENSIONS 1 Optional right-hand airflow requires a field fabricated 6 in. (152 mm) spacer in-between the furnace and coil. PREFERRED AIR FLOW AIR FLOW 1 OPTIONAL AIR FLOW TOP VIEW 21-1/2 3/4 (546) (19) 3/4 (19) 3/4 (19) 20 (508) C OPENING 3/4 (19) SUCTION LINE B E 3/4 (19) END VIEW A LIQUID LINE H G 9/16 (14) B 1 (25) F 14-1/2 2-1/2 (368) (64) FRONT VIEW CONDENSATE DRAINS 21-1/2 (546) 9/16 (14) 9/16 20-3/8 (14) (518) D OPENING 9/16 (14) END VIEW Model No. CHX35-18A-6F CHX35-24A-6F CHX35-24B-6F CHX35-30A-6F CHX35-30B-6F CHX35-36A-6F CHX35-36B-6F CHX35-36C-6F CHX35-42B-6F CHX35-42C-6F CHX35-48B-6F CHX35-48C-6F CHX35-51/61C-6F CHX35-60D-6F A B C D E in. mm in. mm in. mm in. mm in. mm 26-1/2 673 14-1/2 368 13 330 13-3/8 340 3-1/4 83 26-1/2 673 14-1/2 368 13 330 13-3/8 340 3-1/4 83 26-1/2 673 17-1/2 444 16 406 16-3/8 416 3-1/4 83 31-1/2 800 14-1/2 368 13 330 13-3/8 340 3-1/4 83 26-1/2 673 17-1/2 444 16 406 16-3/8 416 3-1/4 83 26-1/2 673 14-1/2 368 13 330 13-3/8 340 3-1/4 83 26-1/2 673 17-1/2 444 16 406 16-3/8 416 3-1/4 83 26-1/2 673 21 533 19-1/2 495 19-7/8 505 3-1/4 83 31-1/2 800 17-1/2 444 16 406 16-3/8 416 3-1/4 83 26-1/2 673 21 533 19-1/2 495 19-7/8 505 3-1/4 83 31-1/2 800 17-1/2 444 16 406 16-3/8 416 3-1/4 83 26-1/2 673 21 533 19-1/2 495 19-7/8 505 3-1/4 83 31-1/2 800 21 533 19-1/2 495 19-7/8 505 3-1/4 83 31-1/2 800 24-1/2 622 23 584 23-3/8 594 3-1/4 83 F G in. mm in. mm 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-3/8 86 1-3/4 44 3-1/4 83 H in. mm 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 4-3/8 111 CHX35 - 1.5 to 5 Ton Indoor Coils / Page 4 DIMENSIONS - FURNACE/COIL COMBINED DIMENSIONS B 33 (838) A HORIZONTAL POSITION Model No. A in. mm CHX35 CHX35-18A, CHX35-24A, CHX35-24B, CHX35-30B, CHX35-36A, CHX35-36B, CHX35-36C, CHX35-42C, CHX35-48C 26-1/2 673 CHX35-30A, CHX35-42B, CHX35-48B, CHX35-51/61C, 31-1/2 880 CHX35-60D B in. mm 59-1/2 1511 64-1/2 1638 CHX35 - 1.5 to 5 Ton Indoor Coils / Page 5 Visit us at www.Lennox.com For the latest technical information, www.LennoxPros.com 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. ©2025 Lennox Industries, Inc.