MrCool Universal MDUI180 E Series Owner's Manual
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MrCool Universal MDUI180 E Series Owner's Manual

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Please read this manual carefully before installation and keep it for future reference.
Owner's Manual
Universal
Series
®
Air Handler (High ESP)
Model - MDUI180**E
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: 3-26-21
Thank you for choosing MRCOOL. Please read this manual carefully before installation and keep it for future reference.
Copyright © 2020 MRCOOL, LLC

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Summary of Contents for MrCool Universal MDUI180 E Series

  • Page 1 Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual. Version Date: 3-26-21 Thank you for choosing MRCOOL. Please read this manual carefully before installation and keep it for future reference. Copyright © 2020 MRCOOL, LLC...

  • Page 2: Table Of Contents

    7. Electric Heat Kit Installation ......15 8. Air Handler Field Conversion ......17 9. Set Indoor Fan Speed ........18 10. Electrical Connection ........22 Post Installation Checks ... 28 Troubleshooting ......30 ....Maintenance and Care EU Disposal Guidelines ....34 Page 1 mrcool.com...

  • Page 3: Safety Precautions

    fine. These regulations may vary due to the passage of laws. A certified technician must perform the installation and service of this product. Should questions arise, contact your local EPA office. mrcool.com Page 2...
  • Page 4 Product uninstallation and recycling must be performed by a certified technician. If the system has a leak-detection system installed, it should be checked for leaks at least every 12 months. Keep a record of all leak checks for the lifetime of the unit. mrcool.com Page 3...
  • Page 5 Before operating the unit under low temperature, connect it to power for 8 hours. If it is deactivated for a short time, for example, one night, do not cut off the power (this is to protect the compressor). mrcool.com Page 4...

  • Page 6: Appliance Overview

    We reserve the right to revise the contents of this manual without notice. 8. If the supply cord is damaged, it must be replaced by MRCOOL, a professional service agent or similarly qualified person in order to avoid damage to the product.

  • Page 7: Accessories

    Please read this manual carefully before installation and keep it for future reference. Owner’s Manual Owner’s Manual (this) UNIVERSAL Series ™ For more details visit www.MrCool.com Liquid Side Stub Kit To connect the unit with the liquid pipe To connect the unit Gas Side Stub Kit with the gas pipe OPTIONAL ®...

  • Page 8: Unit Dimensions

    20 in MDUI18024E & MDUI18036E (540 mm) (540 mm) (1224 mm) (508 mm) (295 mm) 21-1/4 in 57 in 21-3/4 in 11-5/8 in 20 in MDUI18048E & MDUI18060E (540 mm) (1448 mm) (630 mm) (295 mm) (508 mm) mrcool.com Page 7...

  • Page 9: Main Parts

    20-11/16 in x 20-5/16 in x 5/8 in (525 mm x 516 mm x 15 mm) MDUI18048E / MDUI18060E NOTE Dry coil and filter should be installed based upon nominal tonnage. Use 0.96 as approximate SCFM correction factor for wet coil (optional). mrcool.com Page 8...

  • Page 10: Unit Installation

    This product is designed and manufactured to comply with national codes. It is installer’s responsibilities to install the product in accordance with such codes and/or any prevailing local codes/regulations. The manufacturer assumes no responsibilities for equipment installed in violation of any codes or regulations. 4. Replacement Parts... (continued on following page) mrcool.com Page 9...

  • Page 11: Installation Location

    8 feet (2500 Fig. 2.2 mm). and the air handler is not accessible to the general public. Fig. 2.1 mrcool.com Page 10...

  • Page 12: Conventional Line Set Installation

    Line set size matches service valve connection. DO NOT crimp service valve connector when pipe is smaller than connector. See diagram below. MRCOOL Universal Series DC Inverter Must open stop valves after pulling vacuum Fig.
  • Page 13 Indoor unit Outdoor unit Use the following dimensions in to form the oil return bend(s): Fig. 2.8 Fig. 2.8 A (Pipe Diameter) Inches Inches Inches ≥1 ≥26 ≥5.91 ≤150 ≥1.3 ≥33 ≥5.91 ≤150 ≤150 ≥1.34 ≥34 ≥5.91 mrcool.com Page 12...

  • Page 14: Vac® Quick Connect ® Installation

    Air Handler 52 ft/lb 3/8” 37 ft/lb 3/8” 3/4” 52 ft/lb 3/4” MRCOOL Universal Series DC Inverter Open the stop valve only after connecting the refrigerate lines Connect using precharged A-coil Precharged line set with quick connect with 410 Refrigerate ttings in length 15, 25, 35, 50 feet *Failure to follow the instructions provided could result in severe harm to you, this product, or other property.

  • Page 15: Condensate Removal

    “P” style trap that is located closely to the evaporator coil. DO NOT over-tighten the drain connection in order to prevent damage to the evaporator drain pan. See the following figure for details of a typical condensate line “P” trap. Fig. 2.9 mrcool.com Page 14...

  • Page 16: Ductwork

    4 Ton or 5 Ton MHK20U 20kW heat strip 4 Ton or 5 Ton IMPORTANT You must use a compatible heat kit listed in the above chart. Using an incorrect size, could cause the unit to overheat and/or cause equipment damage. mrcool.com Page 15...
  • Page 17 NOTE: The Molex Plug Connection will power the air handler. So, a separate source of incoming power for L1 & L2 terminals on the air handler is NOT needed when using an electric heat kit. d. Replace access panel and check operation. Fig 2.10 mrcool.com Page 16...

  • Page 18: Air Handler Field Conversion

    Location of Dip Switch on Air Handler Main Board This is an example for switch location only. Refer to the illustations above for settings. NOTE Refer to the Universal Condenser Manual for the Dip Switch instructions and settings for the condenser. mrcool.com Page 17...

  • Page 19: Set Indoor Fan Speed

    Level 8 Level 1 Level 2 Level 3 36K Indoor Unit Level 4-Default Dip Switches Level 5 Level 6 Level 7 Level 8 NOTE: 0 means position dip switch to on, 1 means position dip switch to number. mrcool.com Page 18...
  • Page 20 Level 8 Level 1 Level 2 Level 3 60K Indoor Unit Level 4-Default Dip Switches Level 5 Level 6 Level 7 Level 8 NOTE: 0 means position dip switch to on, 1 means position dip switch to number. mrcool.com Page 19...
  • Page 21 1750 1710 1640 1590 1500 1420 1330 1220 1100 Speed 7(CFM) 1870 1830 1810 1800 1760 1690 1620 1520 1440 1350 1250 1150 Speed 8(CFM) 1900 1860 1840 1830 1790 1720 1660 1600 1540 1440 1320 1220 mrcool.com Page 20...
  • Page 22 2170 2090 2010 1910 1760 1650 1550 1430 1380 Speed 7(CFM) 2300 2260 2230 2200 2150 2115 2050 1990 1920 1840 1750 1660 Speed 8(CFM) 2320 2280 2250 2230 2190 2140 2080 2040 2000 1950 1920 1890 mrcool.com Page 21...

  • Page 23: Electrical Connection

    Institute (ANSI), National Fire Protection Association (NFPA) 70, and local/state codes. In Canada, electric grounding conforms to the Canadian electric code CSA c22.1. Failure to observe this warning can result in electrical shock that can cause personal injury. mrcool.com Page 22...
  • Page 24 The units should comply with all applicable local and national rules and regulations on power consumption. When connecting the power cord, make sure the phase sequence of the power supply matches with the corresponding terminals, otherwise the compressor will be reversed and operate abnormally. mrcool.com Page 23...
  • Page 25 Refer to Fig. 2.14 & 2.15 (2-3 ton unit) or Fig. 2.16 & 2.17 (4-5 ton unit) on the next page 5. Lead the connection wire and power cord through the insulation tube. Then secure the wires with wire clamps (as shown in Fig. 2.13). Insulation Tube Cord Clamp Fig. 2.13 mrcool.com Page 24...
  • Page 26 Electrical wiring of ESP Air Handler MDUI18048E/MDUI18060E (With & Without Heat Pump) High ESP Air Handler w/cooling only condenser High ESP Air Handler w/heat pump condenser NOTE: B and D terminals are not used in cooling only condenser Fig. 2.17 Fig. 2.16 mrcool.com Page 25...
  • Page 27 NOTE: For wiring diagram of 4-5 ton units with Combination Max Amperage electric heater please refer to the next page. 30 Amps MDUI 24K/36K + MHK05U 45 Amps MDUI 24K/36K + MHK08U 60 Amps MDUI 24K/36K + MHK10U mrcool.com Page 26...
  • Page 28 Please see the chart below for proper sizing of panel. Circuit Breaker Size in Panel for Air Handler + Heat Kit Combination Max Amperage 60/30 Amps MDUI 48K/60K+ MHK15U 60/60 Amps MDUI 48K/60K + MHK20U mrcool.com Page 27...

  • Page 29: Post Installation Checks

    Is the panel mounted firmly? It may cause an air leak, vibration, and noise. Are there any cracks in the air return or It may cause an air leak, vibration, and supply pipe? condensation. mrcool.com Page 28...
  • Page 30 Operation After Connecting The Power: If all the above steps are complete, power on the unit. If there are any loud and/or abnormal sounds, turn off the unit and contact MRCOOL Tech Support immediately. Verify the unit operates normally under several modes.
  • Page 31 Reduce heat source. Filter screen is blocked by dirt. Clean the lter. NOTICE Check the above items and take appropriate corrective measures. If the unit continues to function improperly, immediatey disconnect power and contact MRCOOL or your installation dealer. mrcool.com Page 30...

  • Page 32: Troubleshooting

    Indoor Jumper cap failure Light out 3S then flash Flash means light on Light out 3S then flash twice Indoor fan failure 0.5S then light out 0.5S Light out 3S then flash four times Indoor tube temperature sensor failure mrcool.com Page 31...
  • Page 33 WARNING When abnormalities occur, stop the unit immediately and disconnect power. Contact MRCOOL. If the unit continues to run abnormally, it may damage the unit and cause an electric shock or a fire hazard. DO NOT attempt repairs to the appliance yourself. Improper repair and maintenance can create electric shock and fire hazards.

  • Page 34: Maintenance And Care

    First run of the unit should be operated by professional personnel from factory appointed service center. Only factory manufactured accessories can be used on the machine. All the instructions listed in this manual should be followed. Warranty will be automatically voiced if the above requirements are not met. Page 30 mrcool.com Page 33...

  • Page 35: 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 34...
  • Page 36 ELECTRICIAN and/or HVAC TECHNICIAN: LICENSE #: INSTALLATION DATE: INSTALLATION LOCATION: SERIAL NUMBER: The design and specifications of this product and/or manual are subject to change without prior notice. Consult with the sales agency or manufacturer for details. Copyright © 2020 MRCOOL, LLC...

This manual is also suitable for:

Universal mdui18024eUniversal mdui18036eUniversal mdui18048eUniversal mdui18060eUniversal series

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