DUCTLESS INVERTER HEAT PUMP INSTALLATION MANUAL Models: MULTI18HP230V1CO MULTI24HP230V1CO MULTI30HP230V1CO MULTI36HP230V1CO MULTI42HP230V1CO
Thank you for choosing a Multi21 Ductless Heat Pump for your customer. Please read this installation manual carefully before installing and starting up the Multi21 System. Take a moment to fill out the product and installation form on the back cover. Retain both the manual and installation record for future reference. Table of Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Nomenclature . . . . . . . . . . . . . . . . . . . . . .
SAFETY PRECAUTIONS Please read the following before installation. This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of the user.
NOMENCLATURE Outdoor Unit 3
SYSTEM REQUIREMENTS Unit Size (BtuH) Liquid Line in (mm) Suction/Gas Line in (mm) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 1/4 (6) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.
SUGGESTED TOOLS • Standard Wrench • Adjustable/Crescent Wrench • Torque Wrench • Hex Keys or Allen Wrenches • Drill & Drill Bits • Hole Saw • Pipe Cutter • Screw drivers (Phillips & Flat blade) • Manifold and Gauges • Level • R410A Flaring Tool • Clamp on Amp Meter • Vacuum Pump • Safety Glasses • Work Gloves • Refrigerant Scale • Micron Gauge 5
INSTALLATION SITE INSTRUCTIONS Indoor Unit Select a site that allows for the following: 1. Ensure the installation complies with the installation minimum dimensions (defined below) and meets the minimum and maximum connecting piping length and maximum change in elevation as defined in the System Requirements section. 2. Air inlet and outlet will be clear of obstructions, ensuring proper airflow throughout the room. 3. Condensate can be easily and safely drained. 4.
INSTALLATION SITE INSTRUCTIONS Outdoor Unit Select a site that allows the following: 1. Install the outdoor unit at a location that is capable of withstanding twice the weight of the unit. 2. Install the outdoor unit where it is convenient to connect refrigerant lines to the indoor units. 3. Install the outdoor unit where the condensate water can be drained unobstructed during the heating mode to a safe location. 4. Do not locate the unit where the noise may be objectionable to neighbors. 5.
CROWN INDOOR UNIT INSTALLATION Crown A C B INDOOR UNIT DIMENSIONS – in (mm) Model A B C CROWN09HP230V1B CROWN12HP230V1B CROWN18HP230V1B 37.8 (960) 37.8 (960) 37.8 (960) 12.6 (320) 12.6 (320) 12.6 (320) 8.0 (205) 8.0 (205) 8.0 (205) PIPE SIZE – in (mm) Unit Size (BtuH) Liquid Line Suction/Gas Line 9,000 12,000 18,000 1/4 (6) 1/4 (6) 1/4 (6) 1/2 (12) 1/2 (12) 5/8 (16) Crown Unit Mounting Bracket Diagram (inches) 33.5 1/2 9K, 12K and 18K Unit Left (Rear piping hole) 27.0 27 77.1 3/8 2.
TERRA INDOOR UNIT INSTALLATION Terra A C B INDOOR UNIT DIMENSIONS – in (mm) Model A B C TERRA09HP230V1AH 34.1 (866) 11.5 (292) 8.2 (208) TERRA12HP230V1AH 34.1 (866) 11.5 (292) 8.2 (208) TERRA18HP230V1BH 40.1 (1018) 12.6 (319) 9.1 (231) TERRA24HP230V1BH 46.4 (1178) 12.8 (325) 10.
TERRA INDOOR UNIT INSTALLATION Terra Unit Mounting Bracket Diagrams (inches) 9K and 12K Unit Left (Rear piping hole) Right (Rear piping hole) 18K Unit Left (Rear piping hole) Right (Rear piping hole) 24K Unit Left (Rear piping hole) Right (Rear piping hole) 10
VIREO INDOOR UNIT INSTALLATION Vireo A C B INDOOR UNIT DIMENSIONS – in (mm) Model A B C VIR09HP230V1B 33.4 (848) 11.4 (290) 8.2 (208) VIR12HP230V1B 33.4 (848) 11.4 (290) 8.2 (208) VIR18HP230V1B 38.2 (970) 11.8 (300) 8.8 (224) VIR24HP230V1B 42.4 (1077) 12.8 (325) 9.
VIREO INDOOR UNIT INSTALLATION Vireo Unit Mounting Bracket Diagrams (inches) 4.6 9K and 12K Unit 21.4 2.3 2.3 Right 1.4 (Rear piping hole) 1.4 Left (Rear piping hole) 27 4 18K Unit 2.3 1.5 7.5 8.1 Left (Rear piping hole) 7.3 2.3 Left (Rear piping hole) 24K Unit 7.3 1.5 5.5 27 7.4 2.8 2.8 1.6 6.0 Right (Rear piping hole) 3.1 Right 1.
INDOOR UNIT INSTALLATION Piping Design and Layout The piping design and layout are critical factors for the overall performance and reliability of the system. Find the desired locations for each indoor unit and the outdoor unit. Then measure and record the piping lengths and heights as directed below to qualify the piping design and layout. Ln H2 L2 H1 L1 First, measure and record the piping length (L1,L2, L3….Ln) from the outdoor unit to each indoor unit. NOTE: Min.
INDOOR UNIT INSTALLATION Piping Length Requirements The system piping layout must take in the constraints of horizontal length on system performance. The outdoor unit has a length limit in which it can properly circulate refrigerant in the system. L =L1 + L2 + + ...
INDOOR UNIT INSTALLATION Piping Height Requirements The system piping layout must take in the constraints of vertical height on system performance. The outdoor unit has a vertical height limit in which it can properly circulate refrigerant in the system. H2 H1 L2 L3 ...
OUTDOOR UNIT INSTALLATION Outdoor Unit Dimensions 35.1 13.4 27.6 38.0 18K Unit 15.6 22.0 14.5 35.1 13.4 31.1 38.6 24K Unit 17.3 22.0 14.
OUTDOOR UNIT INSTALLATION Outdoor Unit Dimensions 14.6 36.2 31.0 38.4 17.3 30K Unit 15.7 24.0 40.0 14.3 43.4 42.5 36K and 42K Unit 17.3 24.8 14.
OUTDOOR UNIT INSTALLATION Install Ground Pad or Wall Hangers 1. 2. 3. 4. Determine proper location for outdoor unit. Follow all instructions provided by manufacturer for installing wall hangers or ground pad. Verify the wall hangers or ground pad can safely support the weight of the outdoor unit. Verify the wall hangers or ground pad is level and meets all outdoor dimensional clearances.
INDOOR UNIT INSTALLATION High Wall Indoor Installation Install Mounting Bracket 1. Attach the mounting bracket to the indoor unit. 2. Find the horizontal center of the indoor unit. 3. Mark the center of the indoor unit on mounting bracket for future reference. NOTE: The center of the mounting bracket is not the center of the indoor unit. 4. Remove the mounting brackets from the indoor unit and position the mounting bracket on the wall in desired location.
INDOOR UNIT INSTALLATION Refrigerant Piping Drill Hole in Wall If indoor unit refrigerant piping is going to exit from the rear: 1. It is recommended that the refrigerant pipe flare connectors extend through the wall to the outside. In some situations field-fabricated piping extensions will be required to extend the indoor unit refrigerant flare connections to the outside of the wall. 2. Use mounting bracket diagrams and dimensions to find and mark the proper location for the wall hole.
PIPING INSTALLATION Refrigerant Piping CAUTION Use refrigeration grade piping ONLY. Uses of other piping will void the Manufacturer’s Warranty. Piping Preparation • Do not open service valves or remove protective caps from tubing ends until all connections are made. • Keep tubing free of dirt, sand, moisture and contaminants. • Use a flexible condensate drain hose to fit over the factory 5/8-inch (15mm) drainage hose.
PIPING INSTALLATION Refrigerant Piping Connections to Indoor Unit NOTE: For maximum serviceability, it is recommended to have refrigerant piping and drain connections on the outside. 1. Feed refrigerant pipes, drain hose and interconnecting wires assembly through wall hole from outdoor to the indoor unit. 2. Adjust the length and carefully bend refrigerant pipes to meet indoor unit refrigerant pipe connections with proper tools to avoid kinks. 3.
PIPING INSTALLATION Indoor Drain Piping How to Relocate Drain Hose from Left to Right Side (if required) 1. Locate drain plug on right side of the drain tray. Firmly grab it and remove from drain tray. Left Right 2. Locate drain tube on the left side of drain tray. Remove hose clamp and twist drain tube counterclockwise and gently pull to remove from the drain tray. 3. Position drain tube on the right side over the drain fitting. Push drain tube onto fitting and rotate clockwise to lock.
PIPING INSTALLATION Indoor Drain Piping The indoor wall unit uses a gravity drain system. There is no internal condensate pump. The drain hose must slope downward with no kinks, raises or fluctuations. 1. Connect the field supplied drain hose to the outlet pipe of indoor wall unit. A field supplied transition or adapter may be required. Secure connection with a field supplied hose clamp. Outlet pipe Drain hose Drain hose 2.
PIPING INSTALLATION Piping Connections to Outdoor Unit 1. Remove service valve cover (if provided) to access the service valves and refrigerant ports. The outdoor unit refrigerant port sizes vary with unit size. See System Requirement Section for refrigerant port sizes. 2. Carefully bend and adjust length of refrigerant pipes to meet outdoor unit service valves connections with proper tools to avoid kinks. Service Valve Cover NOTE: Use proper techniques to cut and re-flare refrigerant pipes, if required.
PIPING INSTALLATION Piping Connections to Outdoor Unit (con’t) 3. Apply a small amount of refrigerant oil to the flare connection on the refrigerant pipe. 4. Properly align piping and tighten flare nut using a standard wrench and a torque wrench as shown in the indoor piping section. 5. Carefully tighten flare nuts to correct torque level referring to the following Torque Table: Torque Table Pipe Diameter inch (mm) Nut Size inch (mm) 1/4 (6.35) 3/8 (9.5) 1/2 (12.7) 5/8 (15.
POWER AND WIRING INSTALLATION Outdoor Unit Electrical Diagrams 18K Unit L L To unit B To unit A L2 L1 c c cable cable cable cable connecting cable Power cord connecting cable cable L cable To the power supply L1 L2 L2 L1 24K Unit To unit A L1 L2 T T To unit B To unit C T c cable c cable connecting cable Power cord c P L1 L2 L1 L2 L cable cable connecting cable connecting cable T To the power supply C C L2 L1 L2 L1 C C 27
POWER AND WIRING INSTALLATION Outdoor Unit Electrical Diagrams 30K Unit T T T To unit B To unit A L1 T To unit C To unit D L2 P cable P cable cable P cable Connecting cable Power cord cable cable Connecting cable cable Connecting cable Connecting cable C T C To the power supply L1 L2 L1 L2 C C D D L2 L1 L2 L1 C C C C 36K and 42K Unit To unit A L1 L2 T To unit B To unit C T T Power cord cable Connecting cable T To unit E T T Connecting cable cable Connecting cable Con
POWER AND WIRING INSTALLATION High Wall Indoor Wire Connection WARNING Disconnect all electrical power to indoor and outdoor units including disconnects, fuses and circuit breakers. Lockout and tag all disconnect switches. 1. Open front cover of indoor unit and remove field wiring terminal block cover. 2. Pull interconnecting wires up from back of indoor unit and position in close to the terminal block on indoor unit.
POWER AND WIRING INSTALLATION Outdoor Unit Wire Connections WARNING Disconnect all electrical power to unit including disconnects, fuses and breakers. 1. Remove the service panel on right side of the outdoor unit. 2. Insert interconnecting wires and main power wires through the wire holes on conduit mounting bracket. 3.
POWER AND WIRING INSTALLATION Setting Master-Slave Indoor Units (24K Size Only) Typically, the outdoor unit will select a master indoor unit upon power up. A single indoor unit may be programmed at the master zone. The master zone will always have priority over the other indoor units. Setting an indoor unit as the master zone is not required for system operation. To set an indoor unit as a master zone, locate master/slave configuration switches on the outdoor main control board.
TESTING AND INSPECTION Leaking Test Leak test each indoor unit, one unit at a time. Repeat the leak test sequence for each indoor unit. 1. Connect the charging hose of the manifold valve to charge the end of the low-pressure valve. 2. Add dry nitrogen to a pressure of 500 lbs. Tightly close both high- and low-pressure valves. 3. Leak-test flare fittings with soap bubbles. If no leak is detected, release nitrogen. System Vacuum and Charge Evacuate each indoor unit, one unit at a time.
TESTING AND INSPECTION Using Vacuum Pump (con’t): 5. Evacuate using either deep vacuum or triple evacuation method. 6. After evacuation is complete, fully close the low side of manifold gauge and stop operation of vacuum pump. 7. Disconnect charge hose from charge connection of the low side service valve. 8. Fully open service valves B and A. 9. Securely tighten caps of service valves.
START-UP □ Turn on main power to all indoor and outdoor units. Start-up Checklist □ Add batteries and press the ON button on the remote controller. • Verify the system is not displaying an error code on the indoor unit display. • Verify the remote controller display turns ON and the indoor unit display is ON. NOTE: The Crown indoor units must first be synced to the remote controller. See Crown Owner's Manual for instructions. □ Press the Mode button to Cooling.
TROUBLESHOOTING PROBLEM CAUSE/SOLUTION System does not restart. Cause: The system has a built-in three-minute delay to prevent short and/or rapid cycling of the compressor. Solution: Wait three minutes for the protection delay to expire. Indoor unit emits unpleasant odor when started. Cause: Typically unpleasant odors are the result of mold or mildew forming on the coil surfaces or the air filter. Solution: Wash indoor air filter in warm water with mild cleaner.
TROUBLESHOOTING PROBLEM CAUSE/SOLUTION Water leaking from the indoor unit into the room. Cause: While it is normal for the system to generate condensate water in cooling mode, it is designed to drain this water via a condensate drain system to a safe location. Solution: If water is leaking into the room, it may indicate one of the following. • The indoor unit is not level right to left. Level indoor unit. • The condensate drain pipe is restricted or plugged.
DIAGNOSTIC CODES Troubleshooting The unit has onboard diagnostics. The outdoor unit will provide status indicators. The indoor wall unit and remote controller will display error codes.
DIAGNOSTIC CODES Malfunction Name Indoor Unit Display Outdoor Unit Indicators Yellow Red Possible Causes High Temperature Resistant Protection E8 Cold Air Protection E9 EEPROM Memory Malfunction EE Module Phase Current Protection Frequency Decrease/Limit Mode En Module Temperature Protection Frequency Decrease/Limit Mode EU 11 flashes and 1 sec Off 1) IPM module over heating or malfunctioning 2) Improper voltage at IPM Module Refrigerant Leakage Protection F0 9 flashes and 1 sec Off 1)
DIAGNOSTIC CODES Malfunction Name Indoor Unit Display Outdoor Unit Indicators Yellow Red Possible Causes Indoor Coil Freeze Protection Frequency Decrease/Limit Mode FH Pump Down or Gathering Refrigerant Status Fo High Indoor Coil Temperature in Heating- Frequency Decrease/Limit Mode H0 1) Incorrect refrigerant charge 2) Metering device malfunction 3) Compressor malfunction Defrost Mode in Heating H1 Operation status Compressor Overload Protection H3 8 flashes and 1 sec Off 1) Wiring term
DIAGNOSTIC CODES Malfunction Name Incompatible Indoor and Outdoor Units Defrosting Status Indoor Unit Display Outdoor Unit Indicators Yellow LP 16 flashes and 1 sec Off note 1 16 flashes and 1 sec Off Possible Causes Red Indoor and outdoor units are not compatible Compressor Phase Current Protection P5 1) IPM module malfunction 2) Outdoor control board malfunction 3) Compressor malfunction Module Temperature Sensor Malfunction P7 Outdoor control board malfunction Module Temperature Protecti
APPENDIX A Authorized Indoor Unit Combinations Outdoor Model Size 2-Zone 18 9+9 9+12 24 9+9 9+12 9+18 12+12 12+18 18+18 9+9+9 9+9+12 9+9+18 9+12+12 12+12+12 30 9+9 9+12 9+18 9+24 12+12 12+18 12+24 18+18 18+24 9+9+9 9+9+12 9+9+18 9+9+24 9+12+12 9+12+18 12+12+12 12+12+18 9+9 9+12 9+18 9+24 12+12 12+18 12+24 18+18 18+24 24+24 9+9+9 9+9+12 9+9+18 9+9+24 9+12+12 9+12+18 9+12+24 9+18+18 12+12+12 12+12+18 12+12+24 12+18+18 9+9+9+9 9+9+9+12 9+9+9+18 9+9+12+12 9+9+12+18 9+12+12+12 12+12+12+12 9+9+9+9+9
LIMITED WARRANTY STATEMENT FOR WARRANTY SERVICE OR REPAIR: Contact your installing contractor. You may find the installer’s name on the equipment or in your Owner’s packet. Complete product registration below and send back by email to Service@twclimate.com. PRODUCT REGISTRATION Model No. Serial No. Date of Installation Owner Name Address of Installation Installing Contractor Address Phone No.
