MrCool Universal Series Owner's Manual
Dc inverter / condenser
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Please read this manual carefully before installation and keep it for future reference.
Owner's Manual
Universal
Series
®
DC Inverter / Condenser (Cooling Only)
MDUCO18*
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: 10-25-21
Thank you for choosing MRCOOL Please read this manual carefully before installation and keep it for future reference.
Copyright © 2021 MRCOOL, LLC
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Table of Contents
Related Manuals for MrCool Universal Series
Summary of Contents for MrCool Universal Series
- Page 1 Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual. Version Date: 10-25-21 Thank you for choosing MRCOOL Please read this manual carefully before installation and keep it for future reference. Copyright © 2021 MRCOOL, LLC...
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Page 2: Table Of Contents
Post Installation Checks ... 32 ....... Maintenance 1. Troubleshooting ........34 2. Error Codes ..........36 3. Unit Maintenance ........37 4. Notice on Maintenance ......39 5. After Sales Services ......... 42 EU Disposal Guidelines ..43 *Pat. https://mrcool.com/mrcool-patents/ Page 1 mrcool.com... -
Page 3: Safety Precautions
fire, and/or cause the unit to fail. Before installing, modifying, or servicing the system, the main electrical disconnect switch must be in the “OFF” position. There could be more than one disconnect switch. Lock out and tag switch with a suitable warning label. mrcool.com Page 2... - Page 4 Product un-installation 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 Please adopt safety protection measures before touching the refrigerant pipe; otherwise injury could occur. Please select the properly-sized copper piping according to the requirements for pipe thickness. mrcool.com Page 4...
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Page 6: Appliance Overview
, we will continuously assess and innovate. We retain the right to make necessary revisions to the product from time to time. We reserve the right to revise the contents of this manual without notice. If the supply cord is damaged, it must be replaced by MRCOOL , a professional service agent, or a ®... -
Page 7: Accessories
(Refer to the NO-VAC QUICK ® CONNECT Line Set section on pg. 24 for these steps). ® NO-VAC QUICK CONNECT ® ® 15 FT 25 FT 35 FT 50 FT LINE SET Lengths Available *Pat. https://mrcool.com/mrcool-patents/ mrcool.com Page 6... -
Page 8: Operating Range
37 in / 24 in 20-7/8 in / 19-1/8 in 37 in x 32-1/4 in x 18-1/8 in. MDUCO18024036 940 mm / 610 mm 530 mm / 486 mm 940 mm x 820 mm x 460 mm mrcool.com Page 7... - Page 9 37 in x 56-3/8 in x 12-5/8 in 37 in / 24-7/8 in 16-1/8 in / 13-7/8 in MDUCO18048060 940 mm x 1430 mm x 320 mm 940 mm / 632 mm 410 mm / 353 mm mrcool.com Page 8...
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Page 10: Unit Installation
® ® Instructions can be found on page 24 View complete install video by scanning this QR code *Pat. https://mrcool.com/mrcool-patents/ Installation Location WARNING DO NOT install the unit where combustible gas leakage may occur. The unit must be installed in a location strong enough to support the weight of the unit and fixed securely, to avoid toppling. - Page 11 ≥ 78.74 in ≥ 39.37 in ≤ 100 mm 2000 mm 1000 mm ≥ 7.87 in ≥ 78.74 in ≥ 39.37 in H < H ≤ H > H 200 mm 2000 mm 1000 mm > H Prohibited mrcool.com Page 10...
- Page 12 ≥ 98.43 in ≥ 39.37 in ≤ 250 mm 2500 mm 1000 mm ≥ 11.81 in ≥ 98.43 in ≥ 39.37 in > H H < H ≤ H 300 mm 2500 mm 1000 mm > H Prohibited mrcool.com Page 11...
- Page 13 ≥ 15.75 in 400 mm ≥ 23.62 in 600 mm Fig. 2.3 inches (in) millimeters (mm) ≤ b ≥ 9.84 in (250 mm) H < H ≤ H b ≥ 11.81 in (300 mm) > H Prohibited mrcool.com Page 12...
- Page 14 ≥ 15.75 in 400 mm ≥ 19.69 in 500 mm WALL ≥ 7.874 in 2000 mm Fig. 2.4 ≥ 15.75” ≥ 15.75 in 400mm 400 mm ≥ 19.69” ≥ 19.69 in 500mm 500 mm ≥ 11.81 in 300 mm mrcool.com Page 13...
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Page 15: Outdoor Installation
Refer to Fig. 2.5 for details. Fig. 2.5 NOTE The outdoor condenser can also be mounted to concrete with the use of masonry anchors. Be sure to drill an appropriate sized pilot hole before attempting to screw the anchor into the concrete. mrcool.com Page 14... -
Page 16: Conventional Line Set Installation
Be extremely careful not to dent or damage the piping while bending them away from the unit. Any dents in the piping will affect the unit’s performance. For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 15... - Page 17 Indoor unit Outdoor unit Use the following dimensions in Fig. 2.8 to form the oil return bend(s): 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 16...
- Page 18 3. After removing burrs from the cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe. Fig. 2.10 For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 17...
- Page 19 Fig. 2.13 PIPING EXTENSION BEYOND FLARE FORM Flare form A = ~1/16 in (1.6 mm) Pipe Fig. 2.14 For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 18...
- Page 20 Cut line Fig. 2.16 For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 19...
- Page 21 Unit Installation Conventional Line Set Installation Replacement Condenser Only Existing Air Handler Fig. 2.17 MRCOOL Universal Series DC Inverter IMPORTANT The existing air handler in the house must be a 410 air handler and use a 410 TXV Biflow Valve...
- Page 22 Ф3/4 in | Ф19 mm 52-55 ft/lb (70-75 Nm) Ф7/8 in | Ф22.2 mm 59-63 ft/lb (80-85 Nm) For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 21...
- Page 23 Refer to Fig. 2.20 For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 22...
- Page 24 (Not for No-Vac Quick Connect) MDUCO18024036 24.6 ft | 7.5 m ≤31.2 ft | ≤9.5 m 0.32 oz/ft 30 g/m MDUCO18048060 For installation with a No-Vac Quick Connect Line Set, refer to the next section starting on page 24 ® ® mrcool.com Page 23...
- Page 25 Allen Wrench Size (Stamped on piping) 52 ft/lb 3/8” 5 mm 3/4” 3/4” 8 mm MRCOOL Universal Series DC Inverter Open the stop/cuto IMPORTANT valves only after connecting the refrigerant lines The stop/cutoff valves on the unit must be opened AFTER connecting the lines and BEFORE turning on the unit.
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Page 26: Vac ® Quick Connect ® * Installation . 24 5. Installation Of Drain Pipe
Wrap the insulating tape from bottom to top, as this will ensure rain/moisture does not seep into the tape overlaps. 3. The entire line set, including drain pipe should be supported and fixed onto the wall with saddles. MDUC018048060 MDUC018024036 ® Fig. 2.22 mrcool.com Page 25... -
Page 27: Condenser Field Conversion
DEFAULT 5 TON 4 TON SETTING Condenser Main Board NOTE Refer to the Universal Air Handler Installation Manual for Dip Switch Instructions and settings to convert the Universal Air Handler from 3-ton to 2-ton, or 5-ton to 4-ton. mrcool.com Page 26... -
Page 28: Electrical Connection
Wiring work must be done according to national wiring rules and regulations. 12. Wiring terminals should be connected firmly to the terminal board. ***Disclaimer: Wiring must meet code specs according to the capacity/tonnage of the unit.*** mrcool.com Page 27... - Page 29 4. Locate the round terminal conduit. Use a screwdriver to replace it and tighten up the terminal screw (as shown in Fig. 2.28). A. Solid Wire B. Braided Wire Solderless Terminal Fig. 2.27 B Fig. 2.27 A Insulation Layer mrcool.com Page 28...
- Page 30 Screw with special washer Round Terminal Fig. 2.28 Terminal Board Wire For all terminal wiring (Refer to Fig. 2.29): 5. Lead the thermostat wire and power cord through the insulation tube (as shown in Fig. 2.29). Fig. 2.29 mrcool.com Page 29...
- Page 31 Electrical wiring of Single-phase unit: MDUCO18024036 Breaker POWER 208-230V L1 60Hz Thermostat Outdoor Unit Fig. 2.30-A Electrical wiring of Single-phase unit: MDUCO18048060 Breaker POWER 208-230V L1 60Hz Thermostat Outdoor Unit Fig. 2.30-B mrcool.com Page 30...
- Page 32 The temperature thermostat wire should also be laid along with the front side plate but away from the power cord. Electrical wiring of Single-phase unit: MDUCO18024036 Electrical wiring of Single-phase unit: MDUCO18048060 mrcool.com Page 31...
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Page 33: Post Installation Checks
Cooling capacity may become Are there any obstacles blocking the air unsatisfactory. inlet or outlets of the units? Have you recorded the length of The refrigerant charging amount refrigerant pipe and the refrigerant cannot be controlled. charge amount? mrcool.com Page 32... - Page 34 Operation after connecting the power: 1. If all the steps above have been completed, power on the unit. 2. Make sure the units run normally. 3. If there are any loud and/or abnormal sounds contact MRCOOL Tech Support immediately, ®...
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Page 35: Maintenance
Too many heat sources in the room. Remove unnecessary heat sources. Filter is blocked or dirty. Replace with a new return filter. Air inlet and outlet of the units are Clear the obstacles and keep the blocked. area well ventilated. mrcool.com Page 34... - Page 36 NOTICE Check the above items and take appropriate corrective measures. If the air conditioner continues to improperly function, please turn off the air conditioner immediately and contact MRCOOL Tech Support, ® at (270) 366-0457, or your installing dealer.
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Page 37: Error Codes
fire hazard. DO NOT attempt repairs to the appliance yourself. Improper repair and maintenance can create electric shock and/or fire hazards. Please contact MRCOOL Tech Support, at the phone number above, for further guidance or a qualified professional for repairs. -
Page 38: Unit Maintenance
4) Do not use organic solvent to clean the air conditioner. 5) If you need to replace a component, contact a professional to repair the unit with a component supplied by MRCOOL® to ensure the quality. 6) Improper operation may damage the unit, causing electric shock or fire. - Page 39 8 hours prior to operation. This is to preheat the crankcase on the compressor. 5. Check that the outdoor unit is firmly secured. 6. If problems are detected, contact your local service professional or MRCOOL Tech Support, ®...
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Page 40: Notice On Maintenance
Refrigeration Equipment Checks Ensure all electrical components are compatible with the product and built to the correct specifications. Follow manufacturer maintenance and service guidelines at all times. When in doubt, consult the MRCOOL Technical ® Department, at (270) 366-0457, for further assistance. - Page 41 1. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus must be at the correct rating. 2. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak. mrcool.com Page 40...
- Page 42 3. Make sure that cylinder is situated on the scales before recovery takes place. 4. Start the recovery machine and operate in accordance with manufacturer's instructions. DO NOT overfill cylinders. Cylinders should have no more than an 80% volume of liquid charge. mrcool.com Page 41...
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Page 43: After Sales Services
When oil is drained from a system, it should be carried out safely. After-Sales Services Any quality or other issues encountered in the purchased air conditioner, please contact the local MRCOOL ® after-sales service department. -
Page 44: 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 43... - Page 45 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 © 2021 MRCOOL, LLC...
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Do you have a question about the Universal Series and is the answer not in the manual?
Questions and answers
Can you adjust fan speed on the air handler. It doesn’t seem to push air Ike our antique system
Yes, the fan speed can be adjusted on the MrCool Universal Series air handler. The manual includes multiple fan speed settings (Speed 1 through Speed 8) with corresponding airflow values (CFM) for different static pressure levels.
This answer is automatically generated