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Summary of Contents for Ameristar M4THM1524A
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Page 1: Installation Instructions
INSTALLATION INSTRUCTIONS Multi-Split Inverter System FEATURING R-410A 15 SERIES Multi-Split Outdoor Unit Heat Pump M4THM15-A 88-M4THM15-1B-EN... -
Page 2: Warnings And Cautions
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 R410-A Refrigerant under Higher Pressure than R-22! The units described in this manual use R410-A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted with "pink" color to indicate the type of refrigerant and may contain a "dip"...
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Page 4: Table Of Contents
Contents Safety Precautions ....................5 Pre-Installation Checklist ..................6 Product Introduction .....................7 Combinations for Outdoor and Indoor Units ............7 Operating Ranges ....................9 Preparation for Installation ..................10 Selecting the Installation Location ..............10 Connection Pipe Requirement ................11 Refrigerant Piping Precautions ................12 Installing the Outdoor Unit ..................13 Condensate Management of the Outdoor Unit ...........13 Installing the Refrigerant Piping ................14 Flaring Process and Bending Pipes ..............14... -
Page 5: Safety Precautions
15 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. This mark indicates a potentially hazardous situation which, if not avoided, CAUTION could result in minor or moderate injury. -
Page 6: Pre-Installation Checklist
15 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
Combinations for Outdoor and Indoor Units MODEL M4THM1518A M4THM1524A M4THM1530A M4THM1536A M4THM1542A Minimum number of connectable indoor units Maximum number of connectable indoor units The multi-split systems can operate with a combination ratio from 50% to 150%. This means that the total combined nominal cooling capacity of the connected indoor units can be up to 1.5 times the nominal cooling... - Page 8 15 Series Multi-Split Ductless Multi-Zone Approved Combinations Indoor Unit Outdoor Unit One Units Two Units M4THM1518A12N 12+12 18,000 BTUH 9+12 Outdoor Unit Two Units Three Units M4THM1524A13N 9+12 9+9+9 9+12+12 12+12+12 24,000 BTUH 9+18 12+12 9+9+12 9+9+18 12+18 18+18 Outdoor Unit Two Units Three Units Four Units...
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Page 9: Operating Ranges
15 Series Multi-Split Combinations for Outdoor and Indoor Units Only one of the 15 Series multi-split outdoor units is able to support up to five indoor units. The figure below illustrates that multiple indoor high wall units may be used on a single M4THM15 multi port system, provided the combination is approved. -
Page 10: Preparation For Installation
15 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: Connection Pipe Requirement
1/4" (Ø 6)x2 3/8" (Ø 9)x2 75 (22.5) 20 (6) 20 (6) M4THM1518A 1/4" (Ø 6)x3 3/8" (Ø 9)x3 35 (10) M4THM1524A 1/4" (Ø 6)x4 3/8" (Ø 9)x4 35 (10) M4THM1530A 230 (70) 3/8" (Ø 9.5)x2 1/4" (Ø 6)x3 1/2" (Ø 12)x1... -
Page 12: Refrigerant Piping Precautions
15 Series Multi-Split Refrigerant Piping Precautions WARNING Hazard of Explosion and Deadly Gases! Failure to follow all proper safe refrigerant handling practices could result in death or serious injury. Never solder, braze or weld on refrigerant pipes or any unit components that are above atmospheric pressure or where refrigerant may be present. -
Page 13: Installing The Outdoor Unit
15 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 14: Installing The Refrigerant Piping
15 Series Multi-Split 4. Place the outdoor unit on the support base. 5. Secure the foot holes of the outdoor unit with bolts (shown below). Foot holes Foot holes Installing the Refrigerant Piping Flaring Process 1. Hold the pipe downward to prevent cuttings from entering the pipe. 2. -
Page 15: Insulating The Refrigerant Piping And Connections
15 Series Multi-Split 4. Do not bend the pipe while insulated. First, cut the insulation with a sharp cutting tool and expose it to the appropriate bend radius, as shown below. After bending the pipe, replace the insulation and seal it with pipe wrap tape. NOTICE 1. -
Page 16: Refrigerant Piping At The Outdoor Unit
15 Series Multi-Split Refrigerant Piping at the Indoor Units Reference the Indoor Unit Installation Guide Refrigerant Piping at the Outdoor Unit Tighten the flare nut of the connection pipe at the outdoor unit valve connector. Follow the flare nut guidelines in this manual. In. -
Page 17: Piping Requirements
15 Series Multi-Split Piping Requirements If the outdoor unit is installed lower than the indoor unit: 1. A drain pipe should be above ground and the end of the pipe should not dip into water. 2. Taping pipes must be done from bottom to top. Do not wrap too tightly to avoid compression of the insulation, otherwise its effectiveness is reduced. -
Page 18: Refrigerant Piping Between The Indoor And Outdoor Units
• Each pipe should be labeled to tell which indoor system it belongs to avoid mistaken or inaccurate piping connections. M4THM1518A M4THM1524A M4THM1530A M4THM1536A M4THM1542A Charging Instructions Maximum total length 20.5 (a+b+c+d+e) - Page 19 15 Series Multi-Split Outdoor unit Equivalent length of the longest connection L Indoor unit Indoor unit...
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Page 20: Vacuum And Refrigerant Leakage Detection
15 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 21: Wiring Precautions
15 Series Multi-Split Wiring Precautions WARNING 1. Before obtaining access to terminals, all supply circuits must be disconnected. 2. Improperly installed and grounded field wiring poses fire and electrocution hazards. For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem within the structure. -
Page 22: Stranded Wiring Connections
15 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 23: Electrical Connections
Size the power supply wiring according to the NEC, local code and the MCA indicated on the unit nameplate. Electrical Requirements Models Power Supply M4THM1518A M4THM1524A 208/230V, 60Hz, M4THM1530A 1phase M4THM1536A M4THM1542A 1. Always check the unit nameplate for the MCA and MOP requirements. -
Page 24: Power Supply Wiring
15 Series Multi-Split Power Supply Wiring 1. Open the side covering plate. 2. Connect the power wiring to the terminals "L1", "L2" and also to the grounding bolt, and then connect the wiring terminals "N(1), 2, 3" of the indoor unit to those of the outdoor unit correspondingly. -
Page 25: Post Installation Checklist
15 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 Unresolved leaks may cause insufficient completed? cooling or heating. -
Page 26: Refrigerant System Diagrams
15 Series Multi-Split Refrigerant System Diagram 18K, 24K, 30K outdoor indoor filter A heat exchanger filter outdoor heat exchanger 4-way valve B heat exchanger filter high pressure switch discharge silencer C heat exchanger discharge temperature sensor filter D heat exchanger gas -liquid separator filter... - Page 27 15 Series Multi-Split Refrigerant System Diagram 36K, 42K Heat Exchanger Liquid Receiver Four-way Valve Capillary Oil Separator Outdoor Unit Stop Valve Compressor Gas/Liquid Separator Electronic Expansion Valve Heating Cooling Indoor Unit Heat Exchanger Heat Exchanger Heat Exchanger Heat Exchanger Heat Exchanger...
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Page 28: Electrical Connections At The Outdoor Unit
6. All power cables and connections must be protected with conduits and fastened securely to avoid loosening and electric shock hazard. 7. All connection ports might not be used, depending on the number of indoor units. Leave knockouts intact if the port is not needed M4THM1524A M4THM1518A To unit A To unit B... - Page 29 15 Series Multi-Split Electrical Connections at the Outdoor Unit M4THM1530A, M4THM1536A To unit B To unit D To unit A To unit C L1 L2 power connection connection connection connection cable cable cable cable cable To the power supply Outdoor unit N(1) N(1) N(1)
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Page 30: Wiring Diagrams
15 Series Multi-Split Wiring Diagrams Color Key Symbol Symbol Color Symbol Symbol Color Symbol Name White Green COMP Compressor o l l Blue YE/GN Yellow/Green Black Violet Orange Note: A "Jumper Cap" may be used to determine fan speed and the swing angle of horizontal louver for this model. - Page 31 15 Series Multi-Split Wiring Diagram 24K AC-L E(PE) LX2-2 LX2-1 COMP WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at AP1 is higher than 30V to prevent the risk of electrical shock! Wiring Diagram 30K AC-L E(PE) LX2-2...
- Page 32 15 Series Multi-Split Wiring Diagram 36K POWER OUTDOOR UNIT OVERLOAD PROTECTOR AC-L EKV1 RT12/13 IN/OUT PIPE TEMP. SENSOR D RT10/11 IN/OUT PIPE TEMP. SENSOR C N(1) EKV2 N(1) RT8/9 IN/OUT PIPE TEMP. SENSOR B RT6/7 IN/OUT PIPE TEMP. SENSOR A EKV3 DISCHARGE TEMP.SENSOR ENVIRONMENT TEMP.SENSOR...
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Page 33: Dimensional Diagrams
15 Series Multi-Split Dimensional Diagrams 18K Units 12 7/16 14 7/8 35 7/16 21 11/16 The dimensions in these drawings are rounded according to standard measurement. Unit:inch 24K-30K Units 35 1/8 13 7/16 15 10/16 37 1/4 The dimensions in these drawings are rounded according to standard measurement. - Page 34 15 Series Multi-Split Dimensional Diagrams 14 9/16 36 1/4 36K Units 39 3/16 16 13/ 16 The dimensions in these drawings are rounded according to standard measurement. Unit:inch 42K Units 14 1/4 42 13/16 17 3/8 24 7/8 The dimensions in these drawings are rounded according to standard measurement.
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Page 35: Troubleshooting
15 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 36: Error Codes
15 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 Display Yellow Light Red Light... - Page 37 15 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 C Gas pipe temperature sensor Flash 22 times malfunction of C Liquid pipe temperature sensor Flash 23 times malfunction of D Gas pipe temperature sensor...
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Page 38: Maintenance
15 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 40 CONFORMSTO ULSTD.1995 CERTIFIEDTO CSASTD.C22.2 Literature Order Number 88-M4THM15-1B-EN Intertek N0.236 Date September 2017 3097844 Supersedes 88-M4THM15-1A-EN The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. Only qualified technicians should perform the installation and ©...
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Questions and answers
If I want to run my outdoor unit on three coils instead of four is there a program I have to do on the motherboard to make that happen? I have an H-3 error code which is bad pipe sensor on D coil so I want to take that one off line to run the remaining 3 coils.