CEILING CASSETTE INSTALLATION MANUAL Models: CAS12HP230V1AC CAS18HP230V1AC CAS24HP230V1AC
Thank you for choosing a Multi21 Ceiling Cassette Ductless Heat Pump System for your customer. Please read this installation manual carefully before installing and starting up the Ceiling Cassette Ductless 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 Example: CAS18HP230V1AC CAS 18 HP 230V 1 A C Product Type S - System O - Outdoor units H - Indoor High Wall D - Indoor Duct C - Indoor Cassette F - Indoor Floor/Ceiling Series Designation CAS - Ceiling Cassette Cooling Capacity 12 - 12,000 BTUH 18 - 18,000 BTUH 24 - 24,000 BTUH Revision Level Style/Color Designation Model Type AC - Cooling Only HP - Heat Pump HC - Heat/Cool Electrical Rating 230V - 208/230V 60Hz 1PH 115V - 115V 60Hz 1PH SYSTEM REQUIREMENTS PIPE SIZE in (mm) Unit Size
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 4
SYSTEM PARTS 1 2 Indoor unit 3 4 Air outlet 5 Air inlet Part Name 1. Power Supply and Communication Wires 2. Drain Pipe 3. Liquid Pipe 4. Decorative Discharge Air Grille (sold separately) 5. Gas Pipe 6. Wired Tether Controller 7. Remote Controller 8. Service Cover 9. Power Supply and Communication Wires 10. Front Panel 11. Outdoor Power Supply 12. Liquid Pipe 13. Gas Pipe 14.
INSTALLATION SITE INSTRUCTIONS Indoor Unit WARNING The unit must be installed in a location which can withstand four times the weight of the unit. Inadequate support may result in serious property damage and injuries. Select a site that allows for the following: • Ensure the installation complies with the installation minimum dimensions and meets the minimum and maximum connecting piping length and maximum change in elevation.
INDOOR UNIT DIMENSIONS 12-18K Indoor Unit Dimensions Model Suction/Gas Line Port Size Liquid Line Port Size Drain Line Connection 12,000 18,000 3/8-in OD Flared 1/2-in OD Flared 1/4-in OD Flared 1/4-in OD Flared 1.2-in OD 1.
INDOOR UNIT DIMENSIONS 24K Indoor Unit Dimensions Suction/Gas Line Port Size Liquid Line Port Size Drain Line Connection 5/8-in OD Flared 3/8-in OD Flared 1.2-in OD Laying Out Indoor Location • Locate the factory supplied installation template included in carton. • Use the template to make an opening in the ceiling for the ceiling cassette main body. • Mark the position of the 4 hanger bolts, refrigerant lines and condensate drain pipes. Ceiling Center Point Hanger Bolts Distance 23.
INDOOR UNIT INSTALLATION Indoor Unit Hanger Mounting Depending on the type of ceiling, attach the threaded hanger bolts securely to the support stud. Before lifting the indoor unit to the installation location, insert the upper nuts, flat washers (with insulation), flat washers (without insulation), lower nuts and double locking nuts on the threaded hanger bolts. Nut Threaded Hanger Bolt Washer Washer Nut Nut NOTE: The hanger bolts, nuts, and washers are field supplied.
PIPING INSTALLATION Refrigerant Piping Drill Hole in Wall 1. Locate and mark proper location for the wall hole. Outdoor Indoor Wall Hole Sleeve 2. Cut the 2 3/4” wall hole with a 5° to 10° downward slant to the outdoors. Seal Hole 3. Insert a wall sleeve (field supplied) into hole to to prevent damage to refrigerant pipes, insulation, condensate drain hose and wiring. Hole Size Wall Hole Diagram 4.
PIPING INSTALLATION Connecting Refrigerant Pipes to Ceiling Cassette 1. Feed refrigerant pipes, drain hose and communication cable assembly through wall hole from outdoor to the Ceiling Cassette. 2. Pull the piping assembly to the indoor unit. Carefully bend refrigerant pipes to meet indoor unit connection ports. Use proper tools to avoid kinks. 3. Add a small amount of refrigerant oil to both ends of the flare fittings. 4.
PIPING INSTALLATION Outdoor Unit Pipe Connections Carefully bend and adjust length of refrigerant pipes to meet outdoor unit port connections. See installation instructions shipped with the outdoor unit for further instructions.. WARNING Indoor Condensate Drain Piping CAUTION WARNING WARNING Observe all local sanitary codes when installing condensate drains. It is recommended to install the condensate drain system with hard polyvinyl chloride (PVC) pipe and matching connectors.
PIPING INSTALLATION Vertical Lift Drainage System If a gradual pitch from the drainage port is not obtainable, the Ceiling Cassette contains an internal condensate drain pump with limited head or lift. The condensate drain pipe may have a vertical height of 11-in. (280mm) maximum above the unit drainage port within the first 12-in as long as the remaining condensate drain pipe gradually descends from that point and is aligned with drainage port.
POWER AND WIRING INSTALLATION WARNING CAUTION WARNING WARNING 1. Before obtaining access to wire terminals, all electrical supply circuits must be disconnected, locked out and tagged. 2. Always use an independent (dedicated) circuit and provide an independent (dedicated) circuit breaker to supply power to the system. 3. Use a circuit breaker with adequate capacity to meet the requirements of the total system. 4.
POWER AND WIRING INSTALLATION Electric Wiring Between Indoor Unit and Outdoor Unit Wired Tether Controller XK-19 N (1) Typical Wiring Diagram 2 3 White Red Black Green CN1 N (1) Cassette Unit 2 CN9 3 G Power: Outdoor Electrical Wiring For Outdoor Unit wire connections, see installation instructions shipped with the outdoor unit.
POWER AND WIRING INSTALLATION Indoor Disconnect Switch (Optional) Local codes may require a disconnect switch within sight of the indoor unit. Use a DFS Disconnect Switch Accessory Kit (Part No: DFS-SWITCH-A) to break interconnecting wires going to the N(1), 2, 3, terminals on the indoor unit, as shown in the wiring diagram below: Indoor Unit Disconnect Switch Outdoor Unit White Indoor Unit Outdoor Unit Red Black Green Wires Installing Wired Tether Controller to Ceiling Cassette 1.
CONTROLLER INSTALLATION AND SETUP (Optional) The following is a brief overview of the Wired Tether Controller installation. See Tether Controller Owner's Manual for more detailed instructions for setup and operation. Preparation for Installation Select a proper location on the wall for mounting the Tether Controller. Install switch box, if required by code. The maximum wire length between indoor and Tether Controller is 26 ft (8m).
FRESH AIR INTAKE (24K Size Only) Connecting Fresh Air Duct The indoor ceiling cassettes have a fresh air intake port for ventilation. A booster fan and duct (field supplied) must be used to feed outdoor air to the indoor unit. Determine the duct diameter, length and booster fan size based on the required airflow. See table below for duct and hole sizes: Unit Size (BtuH) Hole Diameter inch (mm) Duct Diameter inch (mm) 24,000 4.4 (113) 2.
DECORATIVE GRILLE INSTALLATION Mounting Decorative Grille Ceiling Cassette main body 1. Carefully unpack decorative grille and align the decorative grille to the Ceiling Cassette main body. 2. Temporarily attach the decorative grille to the ceiling cassette main body at two (2) corner points. Refrigerant pipes Hook & latch Hook & latch Hook & latch 3. Locate the two (2) Swing Louver electrical connectors on the decorative grille. Height adjustment screw 4.
TESTING AND INSPECTION Start-up Checklist □ □ □ □ □ □ Turn on main power to indoor and outdoor units. • Verify the system is not displaying an error code on the indoor unit display. Point the Remote Controller at the Ceiling Cassette and Press the On button. • Verify the remote controller display turns ON and the Power Indicator lights up on the Ceiling Cassette. Press the Mode button to Cooling. Adjust the room setpoint to bring the system on in cooling mode.
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.
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
GREE ELECTRIC APPLIANCES, INC. www.greecomfort.com PRODUCT & INSTALLATION RECORD For your convenience, please record the model and serial numbers of your new equipment in the spaces provided. This information, along with the installation data and dealer contact information, will be helpful should your system require maintenance or service. UNIT INFORMATION Outdoor Unit: Model No. Serial No. Indoor Unit: Model No. Serial No.