MrCool DIY Installation & Owner's Manual
  1. Manuals
  2. Brands
  3. MrCool Manuals
  4. Air Handlers
  5. DIY
  6. Installation & owner's manual

MrCool DIY Installation & Owner's Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Please read this manual carefully before installation and keep it for future reference.
Installation & Owner's
Manual
4th Generation
DIY
Multi-Zone
®
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.
Version Date: 06-07-22

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DIY and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for MrCool DIY

Summary of Contents for MrCool DIY

  • Page 1 4th Generation Multi-Zone ® 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. Version Date: 06-07-22...

  • Page 2: Table Of Contents

    If you do not feel comfortable conducting this installation process,we recommend you retain the services of a qualified HVAC professional. ****Electrical work must be completed by a qualified electrical technician.**** Page 1 mrcool.com...
  • Page 3 Test Run ............45 Troubleshooting ..........47 Indoor Unit Error Code Display ............ Outdoor Unit Error Code Display ..........Troubleshooting by Error Code ............ Automatic Wiring/ Piping Correction Function ......EU Disposal Guidelines ........54 *Pat. https://mrcool.com/mrcool-patents/ mrcool.com Page 2...

  • Page 4: Safety Precautions

    DO NOT install the unit within 3 ft (1 m) of any combustible gas if the unit is equipped with an auxiliary heater. DO NOT operate the air conditioner with wet hands. This could cause electrical shock. DO NOT turn on the power until the installation has been completed. Page 3 mrcool.com...
  • Page 5 fire, and/or injury. Call your local dealer, or MRCOOL tech support at (270) 366-0457, for further assistance. 3. In North America, service or repair must be performed in accordance with the requirements of NEC and CEC (by authorized personnel or authority having jurisdiction only).

  • Page 6: Cautions

    50 tonnes of CO equivalent, and has a leak-detection system installed, it must be checked for leaks at least every 24 months. 6. Keeping a record of all leak checks for the lifetime of the unit is strongly recommended. Page 5 mrcool.com...

  • Page 7: Parts Overview

    (Interior/Air Handler) Air inlet rear Front Panel Air Filter Wall Mounting Plate Air outlet bottom Quick Connect® Line Set (refrigerant pipe) Pat. https://mrcool.com/mrcool-patents/ MC Cable Fresh Air Filter inlet rear Air inlet si e Electrical Access Air outlet Outdoor Unit (Exterior/Condenser) Fig.
  • Page 8 11. MC cable 12. Stop Valve One-three 13. Fan hood NOTE ON INSTALLATION OF A DIY MULTI-ZONE SYSTEM Please read this instruction manual fully before you attempt to install this system. Because there are multiple units, pipes, and One-two lines to be installed in different locations, and heating/cooling zones to consider, planning your installation is necessary in order to help prevent any potential problems.

  • Page 9: Display Window

    Active Clean function is occurring. will display as filter replacement reminder (power on display for 15 seconds). when forced cooling is activated. AP mode of WIFI connection. will display when the remote controller is switched off. mrcool.com Page 8...

  • Page 10: Accessories

    Parts Stat™ Box) MRCOOL Mini-Stat™ ® (in Mini User Manual Stat™ Box) MRCOOL Mini-Stat User Manual Will vary based Magnetic Ring on the number of zones 1 liquid side adapter and 1 Line-Set Adapter Set suction side adapter used for...
  • Page 11 Please read this manual carefully before installation and keep it for future reference. Owner’s Manual Installation & Owner’s Manual E-Star™ DIY Series For more details visit www.MrCool.com Please read this manual carefully before installation and keep it for future reference. Remote Control Remote Control User Manual Manual For more details visit www.MrCool.com...

  • Page 12: Operating Instructions

    Manual control button 4. Press the MANUAL CONTROL BUTTON a second time to activate the FORCED COOLING FUNCTION. 5. Press the MANUAL CONTROL BUTTON a third time to turn the unit off. Fig 2.1 6. Close the front panel. Page 11 mrcool.com...

  • Page 13: Airflow Directional Control

    10 seconds. Louver NOTE: The open angle of the vertical louver Range should not be set too small when using COOL or HEAT mode, as it will restrict airflow and reduce Fig. 2.4 performance of the unit. mrcool.com Page 12...

  • Page 14: How The A/C & Heat Pump Work

    • Limit energy usage (run time) using the TIMER helps keep the heat in closed. function and SLEEP/ECONOMY mode if applicable. • Regularly inspect and clean the air filters. Page 13 mrcool.com...

  • Page 15: Operation Mode Selection

    Connect the wireless control module via the USB port in the back of the front cover of the indoor unit. This will allow the unit to be controlled by the remote control and/or the smartphone app. For the USB device access, replacement, and maintenance operations must be carried out by a professional staff. Page 14 mrcool.com...
  • Page 16 Operating Instructions Mute Function (optional): Press the LED button on the remote control to turn off the LED display and silence the buzzer of the indoor unit to create a quiet environment. Page 15 mrcool.com...

  • Page 17: Care And Maintenance

    Some models are equipped with suspension bars that are required to prop the lid open. 2. Use the filter tabs to lift filter slightly upward and then pull it toward you. mrcool.com Page 16 mrcool.com...
  • Page 18 2. Check for any damaged or disconnected wires. 3. Clean or replace the filters and ensure they properly installed. 4. Check for water and oil leaks. 5. Check for blockages in the airflow inlet and outlet. 6. Replace batteries in the remote control. Page 17 mrcool.com...

  • Page 19: Installation Diagram

    (Refer to Section 7: performed in accordance with the requirements Refrigerant Piping Connections for these steps). of local and national standards. These could be different based on the region it is being installed in. mrcool.com Page 18...

  • Page 20: Line Set Length Specifications

    Outdoor unit Indoor unit Difference Indoor unit 18K-36K Condenser 32.81 ft (10 m) Condenser 49.21 ft (15 m) 33 ft (10 m) 18K-36K Condenser 32.81 ft (10 m) Condenser Indoor unit 49.21 ft (15 m) Fig. 4.2 Page 19 mrcool.com...

  • Page 21: Indoor Unit Installation

    (not included, but available from online retailers). These are used to pump the water from the air handler and prevent it from ruining the interior of your home. mrcool.com Page 20...
  • Page 22 If the wall is made of brick, concrete, or a similar other sensitive components. material, drill 0.2 in (5 mm) diameter holes in the wall and insert the sleeve anchors provided. Secure the mounting plate to the wall by tightening the screws directly into the anchors. Page 21 mrcool.com...
  • Page 23 1.25-1.95 in (30-50 mm), depending on the model. 1.2-1.95 1.2-1.95 (30-50 mm) (30-50 mm) Fig. 5.4 Adjustment range of indoor unit to the left or right mrcool.com Page 22...

  • Page 24: Prepare Refrigerant Piping

    DRAIN HOSE MUST BE ON BOTTOM The drain hose must be placed at the bottom of the bundle. If it is not, it could cause the drain pan to overflow, which could lead to fire or water damage. Page 23 mrcool.com...

  • Page 25: Outdoor Unit Installation

    If installed in an area where snowfall is expected, take appropriate measures to prevent ice buildup and coil damage. Mount the unit high enough to be above the average accumulated area snowfall. The minimum height must be 18 inches. mrcool.com Page 24...

  • Page 26: Install Drain Joint

    Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. NOTE: there are two different types of drain joints depending on the type of outdoor unit. Page 25 mrcool.com...
  • Page 27 15.87 in DIY-MULTI3-27HP230C (946 mm x 810 mm x 410 mm) (673 mm) (403 mm) DIY-MULTI4-36HP230C 37.24 in x 31.89 in x 16.14 in 26.50 in 15.87 in (946 mm x 810 mm x 410 mm) (673 mm) (403 mm) DIY-MULTI5-48HP230C 37.48 in x 52.48 in x 16.34 in...
  • Page 28 6. Check that the mounting brackets are level. 7. If the feet of the outdoor unit have rubber pads already installed, and you’re using a MRCOOL ® wall-mounted bracket, remove them before attempting to mount the condenser to the bracket.

  • Page 29: Refrigerant Piping Connections

    3. Pack the wall hole with the supplied Neoprene (or Spray Foam can be used) to seal the hole, filling any Connect directly to space that was not taken up by the refrigerant exterior condensor piping and lines. Fig. 7.1 mrcool.com Page 28...

  • Page 30: Connect Line Set To Indoor Unit

    3/4“ / 19 mm confident connecting the line set connectors yourself, Or 2x Crescent 7/8” / 22 mm 15/16“ / 24 mm it is imperative that you contact the MRCOOL ® (adjustable-type) 15/16” / 24 mm 1“ / 26 mm customer service team or an HVAC professional.
  • Page 31 * If an HVAC torque wrench is NOT available: Using two wrenches you used to tighten the connector, once the connector is snug, turn the wrench slightly beyond that point to torque the connector,but do not overtighten it. mrcool.com Page 30...

  • Page 32: Connect Line Set To Outdoor Unit

    This will also void the warranty. NOTE: Keep excess refrigerant hose coiled. Wrap with protective tape and store behind the condenser in a horizontal position (flat with the ground). Page 31 mrcool.com...
  • Page 33 Line Set to the Outdoor Unit and continue the installation. IMPORTANT: Later in the installation process you will be asked to check for leaks at the piping connections. Be sure to include checking these adapters at both ends during your check. mrcool.com Page 32...

  • Page 34: Opening Refrigerant Valves Of Outdoor Unit

    DO NOT force it. Then, reinstall the caps and tighten them securely to ensure that they are properly sealed. King Valves CAUTION If the King Valves are not fully opened, the system could malfunction and suffer damage. Page 33 mrcool.com...
  • Page 35 For more information about checking for leaks, please refer to the Electrical and Gas Leak Checks section of the manual. mrcool.com Page 34...

  • Page 36: Wrap Piping Connections

    If you would like the exterior piping on the side of your home to have a sleeker, more attractive look and add some extra protection in the process, you can purchase a MRCOOL ® LineGuard Line Set Cover. This will encase ®...

  • Page 37: Connect Drain Pipe

    To prevent unwanted leaks, be sure that the of the drain hose in factory installed hollow center rubber plug is water or in containers installed in the unused drain hole. that collect water. This will prevent proper drainage. Fig. 7.3d mrcool.com Page 36...
  • Page 38 Quick Connect ® Connections Drainage Pipe Quick Connect® Line Set MC Cable (refrigerant pipe) Pat. https://mrcool.com/mrcool-patents/ Sound Deadening Pads to wrap connections once connected and checked for leaks. Coiled, excess refrigerant line Outdoor Unit (Exterior / Condenser) Page 37 mrcool.com...

  • Page 39: Electrical Connections

    DO NOT MIX UP LIVE AND NULL WIRES This is dangerous and can cause the air conditioning unit to malfunction. Make sure you clearly distinguish the Live (”L”) Wires from the other wires. mrcool.com Page 38...
  • Page 40 Outdoor unit connective wires power wires (purchased separately) Indoor unit Outdoor unit Outdoor unit Indoor unit Air switch (purchased Indoor & Outdoor separately) connective wires (purchased separately) Fig. 8.1 NOTE: The diagrams above are illustration/reference purposes only Page 39 mrcool.com...
  • Page 41 One optional magnetic ring is used for one cable. This symbol indicates optional magnetic ring. ---- This symbol indicates field wiring. Correct Correct Incorrect Fig. 8.2 mrcool.com Page 40...
  • Page 42 TO A TO B SUPPLY Fig. 8.3 Fig. 8.4 DIY-MULTI2-18HP230C (Up to 2 zones) DIY-MULTI3-27HP230C (Up to 3 zones) Fig. 8.5 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)

  • Page 43: Connect Mc Cable(S) To Outdoor Condenser

    EXAMPLE (Indoor Unit): T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, etc. EXAMPLE (Outdoor Unit): T20A/250VAC (<24,000 Btu/h units), T30A/250VAC (>24,000 Btu/h units), etc. NOTE: For units with R32 or R290 refrigerant, only the blast-proof ceramic fuse can be used. mrcool.com Page 42...
  • Page 44 Continue to do this with all of the MC cables from each of the air handlers, using the wiring diagram for your system on the previous pages as a guide, until they are all connected to the condenser. Page 43 mrcool.com...

  • Page 45: Electrical And Gas Leak Checks

    The actual order of the A, B, C, D, the leakage. and E valves on your system may be slightly NOTE: This may not be required for some different from what is shown, however, the locations in North America. general shape will remain the same. mrcool.com Page 44...

  • Page 46: Test Run

    If the valves NOTE: If the unit malfunctions or does not are not fully opened before the system is operate correctly, please refer to the turned on, damage could occur. Troubleshooting section of this manual before contacting technical support. Page 45 mrcool.com...
  • Page 47 Fig 10.1). Press it 2 times to select the COOL function. Also, if you can spare a few minutes today, and leave a review of your new MRCOOL ® Perform Test Run as normal. product on the partner site where you purchased it, it would really mean a lot to us.

  • Page 48: Troubleshooting

    • Press ON/OFF button on remote control to restart operation. NOTE: If problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit malfunction as well as the model number of your unit. Page 47 mrcool.com...
  • Page 49 Make sure that all doors and windows Cold air is entering through doors and Poor heating are closed during use. windows performance Low refrigerant due leak or long-term use Check for leaks, re-seal if necessary and top off refrigerant mrcool.com Page 48...

  • Page 50: Indoor Unit Error Code Display

    Should your unit display any of the error codes above, turn off the unit and contact the MRCOOL technical department at (270) 366-0457 for more information or a qualified service technician to investigate the matter further.

  • Page 51: Outdoor Unit Error Code Display

    Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited EC 50 Open or short circuit of outdoor unit temperature sensor(T3,T4.TP) LC 06 IPM module frequency limit shutdown/IPM high temperature protection PC 0L Low ambient temperature protection mrcool.com Page 50...

  • Page 52: Troubleshooting By Error Code

    (O) represents the error code being displayed on the outdoor unit. Disclaimer: The error codes and descriptions are for reference only. If your system displays any of these codes contact the MRCOOL technical department for more information or a qualified service technician to investigate the issue further.
  • Page 53 (O) represents the error code being displayed on the outdoor unit. Disclaimer: The error codes and descriptions are for reference only. If your system displays any of these codes contact the MRCOOL technical department for more information or a qualified service technician to investigate the issue further.

  • Page 54: Automatic Wiring/Piping Correction Function

    Gas pipe Indoor unit A 3. Turn on the breaker and wait at least 2 Outdoor unit minutes. 4. Press the check switch on the outdoor PCB board unit LED display "CE". Page 53 mrcool.com...

  • Page 55: Eu Disposal Guidelines

    Sell the appliance to certified scrap metal dealers. Special notice Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad for the environment. Hazardous substances may leak into the ground water and enter the food chain. mrcool.com Page 54...
  • Page 56 Multi-Zone ® 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.

Table of Contents

Save PDF