Related Manuals for American Standard 21 Series
Summary of Contents for American Standard 21 Series
- Page 1 Installer's Guide Split System (R-410A) 21 Series Multi-Zone Inverter System 18,000 Btu/h to 42,000 Btu/h Models : 4TXM2118A12N0A 4TXM2124A13N0A 4TXM2130A14N0A 4TXM2136A14N0A 4TXM2142A15N0A January 2023 MS-SVN085A-EN...
- Page 2 Warnings and Cautions Warnings are provided to alert others of the potential hazards that could result in severe personal injury or death, while cautions are designed to alert others of the conditions that could result in minor or moderate injury. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.
- Page 3 Warnings and Cautions WARNING R-410A Refrigerant under Higher Pressure than R-22! The units described in this manual use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders may contain a "dip" tube to allow for charging of liquid refrigerant into the system.
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Page 4: Table Of Contents
Contents Safety Precautions ....................5 Pre-Installation Checklist ..................6 Product Introduction .....................7 Ductless Multi-Split Approved Combinations ............8 Operating Temperature Ranges ................9 Preparation for Installation..................10 Selecting the Installation Location ..............10 Installing the Outdoor Unit .................. 11 Condensate Management of the Outdoor Unit ........... 11 Refrigerant Piping Between the Indoor and Outdoor Units ........ -
Page 5: Safety Precautions
21 Series Multi-Split Safety Precautions Your personal safety and the proper operation of this equipment depend upon the strict observance of these precautions. This mark indicates a potentially hazardous situation which, if not avoided, WARNING could result in death or serious injury. -
Page 6: Pre-Installation Checklist
21 Series Multi-Split 12. If a system pump-down is performed, turn off the associated equipment and close service valves prior to removing the refrigerant piping. Failure to do so will introduce non-condensables in the system, causing abnormal pressure in the refrigeration cycle which could lead to injury and damage. -
Page 7: Product Introduction
21 Series Multi-Split Product Introduction The 21 Series Multi-split system utilizes inverter compressor technology, which enables the outdoor unit to send refrigerant to multiple indoor units of varying capacities. It is critical, however, that heat loss and heat gain calculations be performed to properly size the multi-split system. -
Page 8: Ductless Multi-Split Approved Combinations
21 Series Multi-Split Table 3: Ductless Multi-Split Approved Combinations Indoor Unit Combinations Outdoor Unit Two Units 4TXM2118A12N0A 9 + 9 12+12 18,000 BTUH 9 + 12 Outdoor Unit Two Units Three Units 9+12 9+9+9 9+12+12 12+12+12 4TXM2124A13N0A 9+18 12+12 9+9+12... -
Page 9: Operating Temperature Ranges
21 Series Multi-Split Table 4: Ductless Multi-Split Quick Reference Multi-Split Heat Pump Outdoor 18,000 BTUH 24,000 BTUH 30,000 BTUH 36,000 BTUH 42,000 BTUH 4TXM2118A12N0A 4TXM2124A13N0A 4TXM2130A14N0A 4TXM2136A14N0A 4TXM2142A15N0A Combinations for Outdoor and Indoor Units The figure below illustrates that multiple indoor high wall units may be used on a single 4TXM21 multi-port system, provided the combination is approved. -
Page 10: Preparation For Installation
21 Series Multi-Split Preparation for Installation Selecting the Installation Location Outdoor Unit WARNING 1. Install the unit on a level surface or on supports that are level. 2. If the location is subject to strong winds, the additional force must be accounted for and the unit must be fixed securely to the base. -
Page 11: Installing The Outdoor Unit
21 Series Multi-Split Installing the Outdoor Unit WARNING 1. Install the unit on a level surface or on supports that are level. 2. If the location is subject to strong winds, the additional force must be accounted for and the unit must be fixed securely to the base. Refer to local codes for additional requirements. - Page 12 21 Series Multi-Split 5. Place the outdoor unit on the support base. 6. Secure the foot holes of the outdoor unit with bolts (shown below). Foot holes Foot holes MS-SVN085A-EN...
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Page 13: Refrigeration And Condensate Piping Tips
21 Series Multi-Split Refrigeration and Condensate Piping Tips If the outdoor unit is installed lower than the indoor unit: 1. If indoor unit condensate line follows refrigeration lines, then the drain pipe termination should be above ground in order that the end of the pipe should not dip into water. -
Page 14: Connection Pipe Requirements
21 Series Multi-Split Connection Pipe Requirements NOTICE The maximum distance of the connection piping in both height and total length is provided in the table below. Do not install these units in locations that exceed these specifications. Table 6: Piping Information for 4TXM21 Min. - Page 15 21 Series Multi-Split While brazing refrigerant pipes, continuously purge them with nitrogen gas. Use a pressure regulator to maintain a flow rate of 1.76 ft³/h (0.05 m³/h) or more. Nitrogen purging while brazing refrigerant pipes Nitrogen Stop valve Pressure regulator...
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Page 16: Installing The Refrigerant Piping
21 Series Multi-Split Installing the Refrigerant Piping Flaring Process 1. Hold the pipe downward to prevent cuttings from entering the pipe. 2. Using an appropriate tube cutter and deburring tool, cut and deburr the refrigerant pipe. 3. Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the indoor unit, put them onto the refrigerant pipe as shown below then flare the refrigerant pipe with a flaring tool. -
Page 17: Refrigerant Piping Between The Indoor And Outdoor Units
21 Series Multi-Split 1. Use a refrigerant pipe bending tool to shape refrigerant piping; smaller diameter piping may allow for light hand bending, providing minimum diameter of 6 inches. 2. Do not bend the pipes in an angle more than 90°. - Page 18 21 Series Multi-Split NOTICE 1. To prevent distortion and breaking of the pipe, bend the pipe with a radius of curvature of 6 in. (150 mm) or more. Use a tubing bender when forming the copper tubing into a bend.
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Page 19: Vacuum And Refrigerant Leakage Detection
21 Series Multi-Split Vacuum and Refrigerant Leakage Detection NOTICE Do not purge the air with refrigerant. Use a vacuum pump to vacuum the installation! 1. When connecting refrigerant pipe to the unit or removing it from the unit, please use both a back-up wrench and the torque wrench. -
Page 20: Wiring Precautions
21 Series Multi-Split Wiring Precautions Electrical Notes: 1. EACH unit should be installed with its own dedicated power supply source. The power source needs to be sized correctly for the unit capacity. 2. The rated voltage of the unit is as shown in this manual. -
Page 21: Stranded Wiring Connections
21 Series Multi-Split Stranded Wiring Connections Cut the wire end with a wire cutter or wire cutting pliers, then strip the insulation about 3/8" (10mm). 1. Using a screwdriver, remove the terminal screw(s) on the terminal board. 2. Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped wire end. -
Page 22: Electrical Connections
21 Series Multi-Split Electrical Connections CAUTION Improper operation may lead to personal injury or property damage. Size the power supply wiring according to the NEC, local code and the MCA indicated on the unit nameplate. Electrical Requirements Models Power Supply... -
Page 23: Post Installation Checklist
21 Series Multi-Split Post Installation Checklist Check the following points before testing the unit: Item to be checked Possible problem Have the indoor and outdoor units been The units may fall, vibrate or make noise. securely installed? Has the refrigerant leak test been... -
Page 24: Refrigerant System Diagrams
21 Series Multi-Split Refrigerant System Diagram 18K, 24K, 30K, 36K and 42K Solenoid valve Solenoid bypass valve Solenoid bypass valve EVI (evaporator vapor injection) MS-SVN085A-EN... -
Page 25: Electrical Connections At The Outdoor Unit
21 Series Multi-Split Electrical Connections at the Outdoor Unit connection cable connection cable connection cable connection cable connection cable connection cable connection cable connection cable connection cable 24K: Power cable Power cable 1. The power cable should be put in from the hole under the connection cable cover. -
Page 26: Wiring Diagrams
(brown) (yellow (blue) (brown) (yellow -green) -green) -green) INDOOR UNIT A INDOOR UNIT B POWER 21 Series Multi-Split 30/36K: To unit A To unit B To unit C To unit D To unit E L1 L2 Power cord connecting connecting... - Page 27 21 Series Multi-Split Wiring Diagram 18K WARNING OPTIONAL BOTTOM OPTIONAL ELECTRONIC ELECTRONIC OUTTUBE OUTTUBE EXHAUST BAND Please don't touch any electronic HEATER EXPANSION EXPANSION TEMP. TEMP. TEMP. 4-WAY MOTOR component or terminal when the VALVE A VALVE B SENSOR SENSOR SENSOR...
- Page 28 21 Series Multi-Split Wiring Diagram 30K & 36K MAGNETIC TERMINAL RING POWER BLOCK BK(BN) L-OUT AC-L AC-L WH(BU) N-OUT Main Board HIGH PRESSURE GN(YEGN) SWITCH YEGN TERMINAL BLOCK WH(BU) N(1) 4WAY 4-WAY VALVE OPTIONAL RD(BN) ELECTRONIC GN(YEGN) EXPANSION (yellow) VALVE D...
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Page 29: Dimensional Diagrams
21 Series Multi-Split Dimensional Diagrams 18K Units 29 21/64 (744.72) 11 13/16 (299.72) 13 55/64 (351.79) 32 23/64 (821.69) 20 5/32 (511.81) 24K Units 13 25/64 (340.10) 35 (889) 15 53/64 (401.82) 37 61/64 (963.93) Unit: inch (mm) 22 7/16 (569.72) The dimensions in these drawings are rounded according to standard measurement. - Page 30 21 Series Multi-Split Dimensional Diagrams 30K-36K-42K Units 14 17/32 (369.06) 37 1/8 (942.97) 16 13/16 (426.974) 40 5/32 (1019.81) 25 (635) Unit: inch (mm) The dimensions in these drawings are rounded according to standard measurement. MS-SVN085A-EN...
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Page 31: Troubleshooting
21 Series Multi-Split Troubleshooting WARNING Improper operation may lead to personal injury or casualty. • Turn off the main power switch immediately if a malfunction is detected. Contact the installing dealer or qualified service technician. If the unit continues to run during a malfunction, the unit may be damaged or electric shock or fire may occur. -
Page 32: Error Codes
21 Series Multi-Split Error Codes The error code will be displayed on the wired controller and the main board of the outdoor unit. The meaning of each error is as shown in the table below. The Indicator Display Indoor Error/Malfunction... -
Page 33: Maintenance
21 Series Multi-Split Indoor The indicator Display Display Name of malfunction Yellow light Red light Green light Liquid pipe temperature sensor Flash 21 times malfunction of port C Gas pipe temperature sensor Flash 22 times malfunction of port C Liquid pipe temperature sensor... -
Page 34: List Of Resistance For Temperature Sensor
21 Series Multi-Split List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6... - Page 35 21 Series Multi-Split Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605...
- Page 36 21 Series Multi-Split Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) Temp( Resistance(k ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20...
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Page 37: Parts Replacement
21 Series Multi-Split General Maintenance Regular checks, maintenance and care should be performed by professional personnel, which will prolong the unit life span. Outdoor Heat Exchanger The outdoor heat exchanger should be checked and cleaned once every two months. Use a vacuum cleaner with a nylon brush to clean up dust and debris on the surface of the heat exchanger. - Page 38 About Trane and American Standard Heating and Air Conditioning Trane and American Standard create comfortable, energy efficient indoor environments for residential applications. For more information, please visit www.trane.com or www.americanstandardair.com CONFORMSTO ULSTD.1995 CERTIFIEDTO CSASTD.C22.2 N0.236 3097844 The AHRI Certified mark indicates company participation in the AHRI Certification program. For verification of individual certified products, go to ahridirectory.org.