Please read this manual carefully before installation and keep it for future reference. Installation & Owner’s Manual DIY Ceiling Cassette ® Model - DIYCASSETTE**HP-230C25 Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual.
Contents ! Safety Precautions 1 Cassette Overview 2 Operating Instructions Warnings .......................................................................................................................................... Cautions ........................................................................................................................................... Parts Diagram .......................................................................................................................
Contents 5 Indoor Unit Installation ................ 20 1. Selecting an installation location ......... 20 2. Cut a Ceiling Hole Using Template ....... 22 3. Drill a Wall Hole for Connective Piping 23 4. Unwind Quick Connect® Line Set* to necessary length ..................................... 23 5. Connect DIYPRO™ Cable to Indoor Unit 24 6. Install Cassette into Ceiling ................... 25 7. Connect Line Set to Cassette ................. 26 8. Check Line Set Connections for Leaks .. 28 9.
! Safety Precautions Read Before Using Incorrect usage may cause serious damage or injury. The symbols below are used throughout this manual to indicate instructions that should be followed closely or actions that should be avoided to prevent death, injury, and/or property damage. This symbol indicates ignoring instructions may cause death or serious injury. WARNING This symbol indicates ignoring instructions may cause bodily injury, damage to the unit, or other surrounding property.
Safety Precautions WARNING DO NOT pull the power cord to unplug the unit. Hold the plug firmly and pull it from the outlet. Pulling directly on the cord can damage it, which could lead to fire and/or electric shock. DO NOT modify the length of the power supply or use an extension cord to power the unit. DO NOT open or remove the unit’s panel while the unit is powered on.
Safety Precautions WARNING 17. The product must be properly grounded during installation or electrical shock could occur. 18. For more information on how to install the appliance to its support, please refer to the indoor unit installation and outdoor unit installation sections of this manual. 19. Keep the power plug clean and remove dust or grime that accumulates around the plug. A dirty plug could cause fire or electric shock. 20.
1 Safety Precautions Cassette Overview NOTE ON INSTALLATION The installation must be performed in accordance with the requirement of local and national standards. The installation may be slightly different in different areas. Air Intake Grille Air Filter Air Vane Display Panel Air Outlet Air Inlet Electronic Control Box Fig. 1.1 NOTE ON ILLUSTRATIONS Illustrations in this manual are for explanatory purposes. The actual shape of your unit may vary. mrcool.
Overview - System Diagram Indoor Unit (Interior/Cassette) Air-break switch 2 3 System Parts: 1. Air Inlet (w/filter installed) 2. Airflow louver (at air outlet) 3. Display Panel 4. Drain Pipe 5. Quick Connect® Line Set (refrigerant pipe)* 6. Air Inlet 7. Air Outlet 8. Remote Controller 9. Outdoor Unit Power Cable *Pat. https://mrcool.
Overview - Indoor Unit Display Display Panel The display panel of the indoor unit will look similar to illustration below. Fig. 1.2 Display Code Meanings Will display when the electric heating function is activated (not available on this unit). Will display when the timer is activated. Will display when the unit is powered on. Alarm indicator. Will display when the Wireless Control feature is activated (some units). Will display when preheating/defrost feature is activated.
Accessories The listing below shows the accessories and parts (these may vary depending on purchase & options). Some of the parts listed as optional may be included in the packaging for the condenser all others will need to be purchased separately. Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock, fire, and/or equipment failure. PART LOOKS LIKE...
Accessories PART LOOKS LIKE... Plastic Wall Sleeve & Cap (included with condenser) QUANTITY 1 Quick Connect® Line Set (refrigerant pipe)* Depends on Purchase Line Set Sizes Include: 16 ft & 25 ft Neoprene (included with condenser) 1 (Sealant for Wall Hole) Rubber Ring (optional) 1 Wireless Controller Module (WiFi) 1 Note: Illustrations are for explanatory purposes only - The actual shape and size may vary.
Safety Precautions Operating Instructions Operating Temperature Ranges 2 The table below represent the normal temperature ranges the unit is designed to operate in. If the unit is operated outside of these ranges, certain safety protection features could activate and cause the unit to disable or operate abnormally.
Operating Instructions Basic Operation Modes: AUTO / COOL / DRY / HEAT / FAN (Model Dependent). AUTO Mode: When you set the unit in AUTO mode, it will automatically select COOL, HEAT, or FAN-ONLY mode depending on the set temperature and the room temperature. The unit will control the room temperature automatically, according to the temperature you set the unit to. COOL Mode: When unit is set in COOL mode, it puts the system into the cooling operation.
Operating Instructions Special Features & Functions (continued): Refrigerant Leakage Detection System: If a refrigerant leak should occur, the LED display will show a refrigerant leak error code and the LED indicator light will flash. Louver Angle Memory Functions (optional): Some models are equipped with a louver angle memory function. When the unit restarts after a power failure, the angle of the horizontal louvers will automatically to their previous position.
Operating Instructions Special Features & Functions (continued): Automated Panel Drop Function: This unit is equipped with four electric motors which raise and lower the air intake grille, which houses the air filter. This function allows for easy access to the air intake grille and filter for cleaning or replacement if necessary. The grille can be lowered to a maximum of 4.9 ft (1.5 m) from the ceiling cassette. Below are instructions of how to raise and lower the panel while using the remote control.
Care and Maintenance 3 CAUTION The power supply must be disconnected before attempting any kind or service and most cleaning procedures (removal and cleaning of the air filter is the only exception)! Before performing maintenance, turn the power off to the unit and then disconnect the power to the circuit at the breaker. Failure to do this could cause electrical shock and injury. DO NOT attempt to perform any repairs on the unit. Contact an authorized service technician.
Care and Maintenance Cleaning the Air Filter: The air filter prevents dust and other particles from entering the indoor unit. Dust buildup can reduce the efficiency of the unit. For optimum efficiency, clean the air filter every two weeks. If you live in a dusty area, it may be necessary to clean the filter more frequently. In the event the air filter is heavily clogged and cannot be cleaned, it is recommended to replace it with a new one.
Care and Maintenance Preparation for Extended Non-Operation: If you plan to not run the unit for an extended period of time (e.g. from the end of summer to the beginning of the following summer), perform the following: 1. Clean the indoor unit and filters as outlined in the previous steps. 2. Operate the unit in FAN-Only mode for at least 8 hours to dry out the inside of the unit. 3. Turn off the unit. Then, turn off the power to the circuit at the breaker.
Indoor Unit Dimensions 4 18.7 in (475 mm) Fig. 4.1 Face Plate (bottom view when installed in ceiling) 53.54 in (1360 mm) 16.65 in (423 mm) 13.19 in (335 mm) 8.07 in (205 mm) Fig. 4.2 Side View 43.5 in (1105 mm) 9.84 in (250 mm) Fig. 4.3 Front View mrcool.
Line Set Length Specifications Line Set Length & Height Specifications When installing the ceiling cassette as part of a single-zone (18K capacity cassette & condenser only) or multi-zone system (9K, 12K, & 18K capacity cassettes can be used with multi-zone condensers), ensure that the length of the refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements listed in the tables below: IMPORTANT! Maximum Line Set Length and Height Specifications The tables below represents
Installation Summary - Indoor Unit Indoor Unit Installation 5 Indoor Unit Installation PRIOR TO INSTALLATION • Determine the best prearranged route in which to move the unit to the installation site as it will be heavy. • Unpack and unseal the unit from its packaging. Then, lift and move the unit using the base of the 4 brackets (2 per side) shown in Fig. 5.1 below.
Indoor Unit Installation Cassette Installation Clearance Requirements Fig. 5.2 Side View (Shown Installed) Units: inches (millimeters) Ceiling Joists Ceiling Thickness ≤0.625 in (5/8 in) (16 mm) Air outlet 16 in (404.4 mm) apart (on-center) Wall Air inlet Ceiling Hole Width 16.9 in (430 mm) Minimum Clearance Between Faceplate & Wall >7.9 in (200 mm) Fig. 5.3 Front View (Shown Installed) >19.7 in (500 mm) Minimum Clearance Between Sides of Unit & Wall >19.7 in (500 mm) Roof 8.86 in 8.
Indoor Unit Installation Step 2: Cut a Ceiling Hole using Template If your installation location has exposed ceiling joists or is a new construction build, please skip to step 3. If your installation location has a finished ceiling, you must cut a hole in the drywall between two ceiling joists, using the included cardboard template as guide (refer to Fig. 5.4). 1. Using a stud finder, locate two ceiling joists at the selected installation location the unit will be mounted in between.
Indoor Unit Installation Step 3: Drill a Wall Hole for Connective Piping 4. Install the wall sleeve finishing cap on the exterior side of the wall hole. You must drill a hole in the wall for the refrigerant piping, drainage pipe, and DIYPRO™ cable to pass through in order to connect the indoor and outdoor units. 1. Determine the location of the wall hole based on where the indoor unit is being installed and relative to where you plan to install the outdoor unit.
Indoor Unit Installation 2. Now, carefully feed the end of the line set you unrolled through the exterior wall hole and route it to the ceiling hole/installation location. Step 5: Connect DIYPRO™ Cable to Indoor Unit In this step, you will connect the DIYPRO™ Cable to the indoor unit. This cable is how the indoor and outdoor units communicate with one another. The wiring within this cable is covered by a durable and flexible conduit covering. 1. Remove the four screws shown in the image below.
Indoor Unit Installation 4. Secure the metal clad of the DIYPRO™ Cable to the circuit breaker box with two ST3.9*10 screws. Then, secure the wire body within the circuit breaker box with a tie. Please see Fig. 5.11 below. NOTE: Three ST3.9*10 screws are provided, but only two are needed to complete this step. The remaining screw is to be kept as a spare. Secure wire body with a tie Fig. 5.
Indoor Unit Installation Step 7: Connect Line Set to Cassette In this step, you will align and connect the pre-charged line set to the ceiling cassette. TOOLS NEEDED: NOTE ON WRENCH SIZES Depending on the capacity rating of your unit, (18K, 27K, 36K, 48K) the wrench sizes needed will vary, refer to the table below (the unit uses metric sizes, the standard sizes listed are approximations).
Indoor Unit Installation TORQUE REQUIREMENTS 1. Excessive force can break the connector or damage the refrigerant piping. You must not exceed the torque requirements shown in the table below. 2. You can find the Outer Pipe Diameter stamped (in inches) on the valve set of the condenser. Refer to this when finding and applying the torque values in the table below. 3. Please note that there may be differences in Torque Wrenches (i.e.
Indoor Unit Installation Step 8: Check Line Set Connectors for Leaks 1. After connecting the line set to the cassette , you will now need to check the piping connections for leaks. You can do this by using leak detection spray, or applying a soapy water solution (liquid detergent/water mixture) to the connection via a spray bottle or brush. If any bubbles begin to form, that indicates there is a leak, and the connection needs to be re-tightened. Tighten the connection and recheck it for leaks.
Indoor Unit Installation NOTE DRAINPIPE INSTALLATION • When using an extended drainpipe, tighten the indoor connection with an additional clamp to prevent if from being pulled loose. • The drainpipe should have a downward slope of at least 1/100 to prevent water from flowing back into the unit. • To prevent the drainpipe from sagging, place support wires every 39-59 inches (1-1.5 meters). Refer to Fig. 5.17 and 5.18 below.
Indoor Unit Installation Minimum & Maximum height of vertical pipe section when connecting multiple units & outlet of the drainpipe is higher than cassette drain outlet port: 0 to 20.8 in (0 to 53 cm) Fig. 5.19 Minimum height of vertical pipe section when connecting multiple units & outlet of the drainpipe is lower than cassette drain outlet port: ≥4 in (≥10 cm) Fig. 5.20 3. Now, pass the drain pipe through the wall hole to the exterior of the house.
Indoor Unit Installation Step 12: Seal Exterior Wall Hole Next you will complete steps to finish the exterior wall hole before installing the outdoor unit. This will consist of bending the line set downward toward the exterior wall and sealing the wall hole with neoprene. 1. In this step, you will carefully bend the portion of the line set coming out of the exterior wall hole down towards the wall.
6 Indoor Unit Installation Outdoor Unit Installation NOTE: Install the unit by following local codes and regulations, these may slightly differ between regions.
Outdoor Unit Installation SPECIAL CONSIDERATIONS FOR EXTREME WEATHER If the unit is exposed to heavy wind: Install the unit so the air outlet fan is at a 90° angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely heavy winds. Ensure the wind barrier does not block necessary airflow. See Fig. 6.2 and Fig. 6.3 below. Strong wind Strong wind If the drain joint comes with a rubber seal (see Fig. 6.4 - A), do the following: 1.
Outdoor Unit Installation TOP VIEW FRONT VIEW A Air Inlet D Air Inlet B Air Outlet Fig. 6.5 Step 3: Anchor Outdoor Unit The outdoor unit can be anchored to the ground or to a wall-mounted bracket using M-10 bolts. Prepare the installation base of the unit according to the dimensions below. For instructions of how to mount the unit to a wall mounted bracket, please refer to the following page.
Outdoor Unit Installation If you are installing the unit on a wall-mounted bracket, follow these steps: CAUTION Before installing a wall-mounted unit, make sure that the wall is made of solid brick, concrete, or a similarly strong material. The wall must be able to support at least 4 times the weight of the unit. 1. Mark the position of the bracket holes based on the dimensions in the Mounting Dimensions chart on the previous page. 2. Pre-drill the holes for the expansion bolts. 3.
Outdoor Unit Installation 4. Using the first image below as a guide, starting with the bottom screw connector, you will now tighten the line set to the outdoor unit.
Outdoor Unit Installation Step 5: Opening Refrigerant Valves In this step you will be opening the refrigerant valves & king valves (multi-zone condenser only) of the outdoor unit. This will release refrigerant from the pre-charged line set into the whole system. CAUTION All of these steps must be completed BEFORE powering the unit. Otherwise, it could cause system damage and/or complete system failure. 1.
Outdoor Unit Installation Step 6: Check Line Set Connections & Valves for Leaks 1. After connecting the line set and opening the condenser refrigerant valves, you will now need to check all of the piping connections & valves for leaks. You can do this by using leak detection spray, or applying a soapy water solution (liquid detergent/water mixture) to the connection via a spray bottle or brush. If any bubbles begin to form, that indicates there is a leak, and the connection needs to be re-tightened.
7 Cassette Panel Installation & Wireless Controller Module Step 1: Mount Panel to Indoor Unit 1. Carefully grab the air intake grille with your fingers and slowly pull it out and allow it to hang from the panel as shown in Fig. 7.1 below. This is necessary to access some of the holes for the mounting screws to attach the panel to the unit. Fig. 7.1 Grab at these locations 2. Now, with the assistance of another person, carefully raise and position the cassette face panel into place.
Cassette Panel Installation & Wireless Controller Module 4. Close both sides of the panel. Step 2: Connect Panel Display Board to Indoor Unit Main Control Board In this step, you will connect the panel wiring harness for the display board to the main control board of the indoor unit. 1. Connect each connector of the panel wiring harness to its corresponding port on the main control board. The corresponding connectors and ports should be color-coded match one another. Please refer to Fig. 7.
Cassette Panel Installation & Wireless Controller Module 3. Open the front panel and insert the wireless module into the designated interface (refer to Fig. 7.9 and the images below). 5 core Insert Wireless Control Module into this connection point Infrared Controller Plug Fig. 7.9 IMPORTANT! Once the entire installation has been completed and the system has been fully tested, the area above and around the cassette should be re-insulated.
8 Electrical Connections BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS **NOTE: ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED TECHNICIAN!** DO NOT connect another appliance to the outlet for the unit. Only connect the unit to an individual branch circuit outlet. DO NOT allow wires to touch or rest against the refrigerant piping, compressor, or any other moving parts within the unit. 1.
Refrigerant Air Switch Piping Information Connection NOTE ON AIR SWITCH • When the maximum current of the air conditioner is more than 16A, an air switch or leakage protection switch with protective device shall be used (purchased separately). • When the maximum current of the air conditioner is less than 16A, the power cord of the air conditioner should be equipped with a plug. Systems in the North American market should be wired according to NEC & CEC requirements and regulations.
18K Single-Zone Wiring Information & Diagrams 18K Single-Zone Wiring Information If the system being installed is an 18K single-zone cassette and condenser, please read the information below before proceeding to the next step in the installation. If you’re installing a ceiling cassette as part of a multi-zone system, please proceed to the next page for the multi-zone wring information and diagrams. NOTE: The outside unit’s terminal block is protected by an electrical wiring cover on the side of the unit.
Multi-Zone System Wiring Information & Diagrams Multi-Zone System Wiring Information If the ceiling cassette is being installed as part of a multi-zone system, please read the information below and refer to the wiring diagrams on the following pages before proceeding to the next step in the installation. NOTE: The outside unit’s terminal block is protected by an electrical wiring cover on the side of the unit. A comprehensive wiring diagram is printed on the inside of the wiring cover.
Multi-Zone System Wiring Information & Diagrams NOTE ON PROPER USE OF MAGNETIC RINGS IN MULTI-ZONE WIRING This product is designed to run on 60Hz frequency which is the North American standard. Run the main power cord through the lower line-outlet of the cord clamp. Use a magnetic ring (not supplied, optional part) to hitch the connective cable of indoor and outdoor units after installation. One optional magnetic ring is used for one cable. This symbol indicates optional magnetic ring.
Multi-Zone System Wiring Information & Diagrams Wiring Diagrams (4-Zone & 5-Zone) OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL Fig. 8.6 DIY-MULTI4-36HP230C (Up to 4 zones) 1(C) 2(C) 3(C) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E) 1(A) 2(A) 3(A) 1(B) 2(B) 3(B) OPTIONAL TO C TO D TO E OPTIONAL OPTIONAL TO B OPTIONAL OPTIONAL OPTIONAL TO A L1 L2 POWER SUPPLY Fig. 8.7 DIY-MULTI5-48HP230C (Up to 5 zones) Page 47 mrcool.
Connecting DIYPRO™ Cable to Outdoor Unit Step 1: Connect DIYPRO™ Cable to Outdoor Unit 1. Remove the screws from the electrical wiring cover from the outdoor condenser, as shown in the image below and Fig. 8.8, and remove it. Cover Outdoor Unit Wiring Diagram is located on the inside of the wire cover on the outdoor unit. Fig. 8.8 2. Remove the retaining nut from the end of the DIYPRO™ cable that you fed through the wall hole earlier in the installation, as shown in the image below.
Connecting DIYPRO™ Cable to Outdoor Unit 5. Then, you will connect the wires to the terminal block. Each wire should be numbered and correspond with a connection port on the terminal block. Match up each wire with the correct port, and firmly screw the u-lug of each wire to its corresponding terminal. Now, screw the ground wire into the bottom screw of the terminal block, as shown in the images below.
Refrigerant Piping Connection Electrical and Gas Leak Checks 89 Gas Leak Checks There are two different methods to check for gaseous leaks. Use Fig. 9.1 below as a guide for the critical points to check for leaks. Soap and Water Method WARNING – RISK OF ELECTRICAL SHOCK ALL WIRING MUST BE INSTALLED BY A LICENSED ELECTRICIAN AND COMPLY WITH LOCAL, STATE, AND NATIONAL ELECTRICAL CODES.
Test Run Refrigerant Piping Connection Before Test Run A test run must be performed after the entire system has been completely installed. Complete and confirm the list of checks below before performing a test run. List of Checks to Perform Before Test Run • The indoor & outdoor units are properly installed. • All piping & wiring are properly connected. • No obstacles are near the inlet and outlet of the unit that might cause poor performance or product malfunction.
Test Run 4. Ensure water is being drained from the pipe. It could take up to one minute before the unit begins to drain depending on the length of the drain pipe. 5. Ensure there are no leaks in any of the piping. 6. Stop the air conditioner. Then, turn off the main power switch. 7. Now, reinstall the test cover. Water Discharge Test Instructions IMPORTANT: • Before performing the test, ensure that the water discharge pipeline is installed and sealed properly.
11 Troubleshooting WARNING In the case of any of the following, turn off the unit immediately! • Signal/power cable is damaged or abnormally warm • Burning odor • Loud or abnormal sounds • A power fuse or circuit breaker trips frequently • Water or other objects fall into or out of the unit DO NOT ATTEMPT TO CORRECT OR FIX THESE ITEMS YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER IMMEDIATELY! Common Issues The following events may occur during normal operation, and may not indicate a malfunction.
Troubleshooting Issue Possible Causes If a low hissing sound is heard during operation, this is normal. It is caused by refrigerant gas flowing through the system. Both indoor and outdoor units make noises If a low hissing sound is heard when the system starts, is defrosting, or has just stopped running this is normal. The noise is caused by the refrigerant gas stopping or changing direction.
Troubleshooting Issue The unit is not working The unit starts and stops frequently Possible Causes Solution Power outage or failure. Wait for power to be restored. The power is turned off. Turn the power on. The fuse is blown or burned out. Replace the fuse. The unit’s 3 minute protection has been activated. Wait 3 minutes after restarting the unit. Timer is activated. The system has too much or not enough refrigerant. Incompressible gas or moisture has entered the system. Turn off the timer.
Troubleshooting Automatic Wiring/Piping Correction Function for Multi-Zone Condensers ONLY! NOTE The function for the automatic wiring/piping correction illustrated below is intended for use by a licensed electrical technician only. Newer models now feature automatic correction of wiring/piping errors. Press the"check switch" on the PCB board of the outdoor unit for 5 seconds until the LED displays "CE.” This indicates that this function is working.
Refrigerant Piping Connection EU Disposal Guidelines 12 The marking shown below when depicted on the product or its literature, indicates that electrical waste and electrical equipment should not be mixed with general household waste. Correct Disposal of This Product (Electrical Waste & Electronic Equipment) This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appliance, the law requires special collection and treatment.
DIY Ceiling Cassette ® Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual.
