Page 2 - Contents; Page 1; Maintenance and Care
Contents Page 1 mrcool.com EU Disposal Guidelines .............. 30 6 Post Installation Checks ........... 23 3 Troubleshooting ......................... 25 4 Maintenance and Care ................ 29 5 Unit Installation ........................... 9 1. Pre-Installation Instructions.....................
Page 3 - Page 2; WARNING; DO NOT; let substances or gases other than the refrigerant; modified, fire or even an explosion could occur.; Read Before Installation; Incorrect installation may cause serious damage or injury.; The seriousness of potential damage or injuries is classified as; WARNING; or; CAUTION; WARNING; This symbol indicates that you should; NEVER; perform the indicated action.; Safety Precautions
Page 2 Safety Precautions mrcool.com WARNING Please read the manual in its entirety before installing, operating or repairing.DO NOT share the electrical circuit with other appliances. Improper or insufficient power supply can cause fire or electrical shock. When connecting refrigerant piping, DO NOT l...
Page 4 - Page 3; Note about Flourinated Gases:; power, otherwise electric shock may occur.; Keep a record of all leak checks for the lifetime of the unit.
Page 3 Safety Precautions mrcool.com Note about Flourinated Gases: 1.2. 3. 4.5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 6. 5. Install the unit in a firm location that can support the unit’s weight. If the installation location cannot support the weight, or the installation is performed improperly, the unit m...
Page 5 - Page 4; DO NOT install the unit within 3 feet (1 meter) of
Page 4 Safety Precautions mrcool.com 1.2. For units that have an auxiliary electric heater, DO NOT install the unit within 3 feet (1 meter) of combustible materials. DO NOT install the unit in a location that may be exposed to combustible gases. If combustible gas accumulates around the unit, it may...
Page 6 - Page 5; and operation of the Universal; Appliance Overview
Page 5 Safety Precautions mrcool.com To Our Customers; Thank you for choosing a MRCOOL home HVAC product. Please read this manual carefully before installation and operation of the Universal ® Series Air Handler to ensure correct use and handling. In addition to the safety precautions in the previou...
Page 7 - Page 6; all of the installation parts and; The Universal; Accessories; Quick Connect
Page 6 mrcool.com Appliance Overview 1 1 (this) 1 1 Owner’s Manual Liquid Side Stub Kit (Optional - Sold Separately) Gas Side Stub Kit (Optional - Sold Separately) PART LOOKS LIKE... QUANTITY Unless otherwise stated (as “OPTIONAL”) the air conditioning system includes the following accessories. Use ...
Page 8 - Page 7; Unit Dimensions; Width
Page 7 mrcool.com Appliance Overview Fig. 1.1 Unit Dimensions MDUI18048/MDUI18060 Unit Dimensions (Inches/MM) Width Depth Height A B 24-3/4 in. (630mm) 21-1/4in. (540mm) 57in. (1448mm) 11-5/8in. (295mm) 20in. (508mm) A H W D B
Page 9 - Page 8; Main Parts; Dry coil and filter should be installed based upon nominal tonnage.
Page 8 mrcool.com Appliance Overview Main Parts Electric Box Assembly Centrifugal Fan Fan Motor Secondary Drain Pan Evaporator Assembly Primary Drain Pan NOTE 1. Dry coil and filter should be installed based upon nominal tonnage. 2. Use 0.96 as approximate SCFM correction factor for wet coil (optiona...
Page 10 - Page 9; Pre-Installation Instructions; Checking Product Received; Unit Installation; electrical shock that can cause personal injury or death.; The Conventional Weld Line Set Installation; Instructions can be found on; The Universal; RCO
Page 9 mrcool.com Pre-Installation Instructions 1. Checking Product Received After receiving the product, please check for any damage caused by transportation. Shipping damage is the responsibility of the carrier. Verify the model number, specifications, and accessories are correct prior to installat...
Page 11 - Installation Location; to install a protective barrier to prevent such damage.; Replacement Parts
Page 10 mrcool.com Unit Installation Installation Location WARNING • This air handler is designed for indoor installation only. Do not install it outdoors. • When installing the air handler, take consideration to minimize the length of refrigerant tubing as much as possible. • When installing in an ...
Page 12 - Unit Installation - OPTION 1: Conventional Weld / Flare Line Set; Conventional Line Set Installation; Specification of Connection; WELD Type Complete Unit Replacement; practice increases the chances for refrigerant leakage.; Screw Connection; Copper Piping; Torque Wrench
Page 11 mrcool.com Unit Installation - OPTION 1: Conventional Weld / Flare Line Set Conventional Line Set Installation Specification of Connection Pipe Piping Preparation 1. WELD Type Complete Unit Replacement All cut ends are to be round, burr free, and cleaned. Failure to follow this practice incre...
Page 13 - INSTRUCTIONS FOR USE WITH; NO-VACTM QUICK CONNECT® LINE SET; SOLD SEPARATELY; Please read and follow the instruc�ons and diagram below; Complete Unit Replacement
Page 12 mrcool.com Unit Installation - OPTION 2: No-Vac ® Quick Connect ® Line Set INSTRUCTIONS FOR USE WITH NO-VAC™ QUICK CONNECT® LINE SET SOLD SEPARATELY KINK RESISTANT, PRECHARGED, SIMPLE SECURE QUICK CONNECT, 100% CONNECTION GUARANTEE www.mrcool.com v01-07-2020 Please read and follow the instru...
Page 14 - Condensate Removal; IMPORTANT
Page 13 mrcool.com Unit Installation Condensate Removal 1. DO NOT connect the condensate drain pipe into the waste pipe or other pipelines that are likely to produce corrosive or peculiar smells. This will prevent odors from entering indoors or corrupting the unit. 2. DO NOT connect the condensate d...
Page 15 - Ductwork; Electric Heater; available as an accessory. The only heater kits that can be used are; should be identical.
Page 14 mrcool.com Unit Installation Ductwork This air handler is designed for a complete supply and return ductwork system. Return ductwork: Do not install and/or position ductwork in an area that can introduce toxic, or objectionable fumes/odors into the ductwork. The return ductwork is to be intr...
Page 16 - Only use copper conductors.; Cover Plate; the unit to overheat and/or cause equipment damage.; Circuit breaker, 15kW heat strip
Page 15 mrcool.com Unit Installation CAUTION 1. Ensure that all power supply is disconnected prior to installing the heater kit. 2. A means of strain relief and conductor protection must be provided at the supply wire entrance into cabinet. 3. Only use copper conductors. 4. Installation must follow ...
Page 17 - NOTE; Converting Unit From 5 Ton to 4 Ton; Air Handler Field Conversion; This is an example for switch
NOTE Refer to the Universal® Condenser Manual for the Dip Switch instructions and settings for the condenser. mrcool.com Page 16 Fig. 2.8 Fig. 2.9 Location of Dip Switch on Air Handler Main Board Unit Installation Converting Unit From 5 Ton to 4 Ton Follow these instructions during unit installation...
Page 18 - directly contact any; NOT; Vacuum Lines; Electrical Connection; Electrical Regulations
Page 17 mrcool.com Unit Installation WARNING Before performing electrical work, read the following regulations 1. Electrical installation must be conducted by professionals in compliance with local laws, regulations and this installation manual. Never artificially extend the length of a power cord. T...
Page 19 - Outdoor Unit Model; amps; Ampacity; Electrical Parameters; . The fuse is located on the main board.
Page 18 mrcool.com Unit Installation Outdoor Unit Model Power Supply Max. Overcurrent Protection (A) 208/230V 60Hz 15 amps 4 amps MDUI18048/MDUI18060 Min. Circuit Ampacity Electrical Connection Electrical Parameters 1 . The fuse is located on the main board. 2 . Install a circuit breaker at every po...
Page 20 - Connecting the Power Cord & Thermostat Wire; For braided wires; Refer to
Page 19 mrcool.com Unit Installation Electrical Connection Connecting the Power Cord & Thermostat Wire For solid wires ( Refer to Fig. 2.10 A ): 1. Use wire cutters to cut off the wire end and then peel away about 25mm of the insulation layer. 2. Use a screwdriver to unscrew the terminal screw on...
Page 21 - Power; Wrong wire connection may burn the electrical components.
Page 20 mrcool.com Unit Installation Electrical Connection Connecting the Power Cord & Thermostat Wire AP1 Power G L1 L2 Fan motor 1 XT3 TC RD BK BU Y E W H 1 X1 2 3 4 5 6 G M XT1- L1 XT1- L2 Note: 1.Please refer to the instruction manual to check whether the unit can connect to the engineering ...
Page 22 - For all terminal wiring; the wires with wire clamps (as; shown in; Cord Clamp
Page 21 mrcool.com Screw with Special Fastener Round Terminal Wire Terminal Board For all terminal wiring ( Refer to Fig. 2.13 on the next page ): Lead the thermostat wire and power cords through the insulation tube. Then secure the wires with wire clamps (as shown in Fig. 2.12 ). Fig. 2.12 Fig. 2.1...
Page 23 - clamps and the latter ones with small clamps.
Page 22 mrcool.com Unit Installation WARNING 1. High and low voltage wires should be led through different rubber rings of the electric box cover. 2. Do not bundle the thermostat wires or lay them side by side, otherwise errors will occur. 3. High and low voltage wires should be secured separately. S...
Page 24 - Refrigerant Piping Connection; List of Checks to Perform; Before Test Run; Electrical Safety Checks; Post Installation Checks
Page 23 mrcool.com Refrigerant Piping Connection List of Checks to Perform Possible Malfunctions PASS/FAIL Is the main body installed securely? Did you conduct a water leakage test? Is the unit well insulated from heat? Does water drain properly from drain hose? Is the voltage consistent with specifi...
Page 25 - Preparation Before Connecting The Power:; Power must not be connected if the installation is not complete.; Operation After Connecting The Power:; If all the above steps are complete, power on the unit.; Test Run
Page 24 mrcool.com Post Installation Checks Preparation Before Connecting The Power: 1. Power must not be connected if the installation is not complete. 2. Verify the control circuit is correct and all the wires are firmly connected. Valves on the vapor and liquid line should be completely open. 3. R...
Page 26 - Outdoor Unit Installation; Maintenance; Problem; NOTICE
Page 25 mrcool.com Outdoor Unit Installation Maintenance 4 4 Troubleshooting (1) If your air conditioner fails to function normally, check the following items before conducting maintenance: Problem Cause Corrective Measure The unit will not activate. Abnormal cooling or heating. The unit operates bu...
Page 27 - Troubleshooting
Page 26 mrcool.com Troubleshooting Problem Time of Occurrence Cause Mist comes from the unit. Unit doesn’t run. The unit generates noise. The unit emits odor. Indoor unit still runs after switched off. Dust comes from the unit. During operation. When power is turned on. When unit is started immediat...
Page 28 - Error Code; electric shock or a fire hazard.; Number Error Code
Page 27 mrcool.com Troubleshooting Error Code WARNING 1) 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. 2) DO NOT attempt repairs to the appliance y...
Page 30 - Drain Pipe; which will prolong the life span of the unit.; Maintenance After Seasonal Use; Warranty should meet the following requirements:; Only factory manufactured accessories can be used on the machine.
5 Page 29 mrcool.com Maintenance and Care Drain Pipe Notice Before Seasonal Use Regular check, maintenance, and care should be performed by professional personnel, which will prolong the life span of the unit. Regularly check the drain pipe for clogs in order to ensure smooth condensate drainage. Pu...
Page 31 - Special notice; ance, the law requires special collection and treatment.; dispose of this product as household waste; EU Disposal Guidelines
Page 30 mrcool.com Refrigerant Piping Connection Special notice This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appli - ance, the law requires special collection and treatment. DO NOT dispose of this product as household waste or unsorted municip...
Page 32 - Consult with the sales agency or manufacturer for details.; INSTALLATION LOCATION:
Universal ® Series 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 . ELECTRICIAN and/or HVAC TECHNICIAN: LICENSE #: INSTALLATION DATE: INSTALLATION LOCATION:...
