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INSTALLER'S INSTRUCTION & USER'S MANUAL
Medium Static Pressure Recessed Fan Coil Indoor Unit
Model Numbers:
WMMS-09EF-M2B(59)4
WMMS-12EF-M2B(59)4
WMMS-18EF-M2B(59)4
WMMS-21EF-M2B(59)4
WMMS-24EF-M2B(59)4
Thank you for choosing this YMGI product. Please read the owner's manual carefully before installation and operation and retain for your
records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download
a current electronic version.
This product is designed and manufactured to be free from any defects in material and workmanship during normal use and
maintenance. Installation, operation, maintenance and repair must follow all standards and professional practices for regular cooling
and heating equipment, such as NEC, State, or Local Codes and all related documents/manuals provided by YMGI. Failure to follow
and adhere to all codes and documentation can cause damage to equipment, property even personal injury.
Installer: Currently licensed/certified HVAC technicians only. Must Read the manual and all provided documents prior to installation.
Complete and fill out all required information on the warranty registration card.
User: Retain this manual and all supplied documents for your records and future reference.
Servicer: Use this manual for information concerning servicing and maintenance of this product.
Only qualified technicians should install and service this equipment. The installation, startup, operation and servicing of this equipment
can be hazardous and requires a HVAC professional who has been trained, licensed and certified. Installations, adjustments or any
equipment alterations done by an unqualified person could result in serious injury and even death. When working on the equipm ent,
observe all precautions in the provided documents, on the tags, stickers, and labels that are attached to or placed on the equipment.
YMGI, Engineered Comfort Products for A Sustainable
SYMPHONY SOLO DC INVERTER (59)4 EF
18k-24k, 21 SEER Cooling and Heat Pump
SAFETY WARNING
and Efficient Green World!
NOTICE
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Related Manuals for YMGI WMMS-09EF-M2B4
Summary of Contents for YMGI WMMS-09EF-M2B4
- Page 1 WMMS-24EF-M2B(59)4 Thank you for choosing this YMGI product. Please read the owner’s manual carefully before installation and operation and retain for your records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download a current electronic version.
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Page 2: Table Of Contents
Limited Product Warranty ........................8 Limited Product Warranty Registration Card ..................10 Why Does YMGI Group Require Installation and Service to Be Performed 100% By Currently Licensed or Certified HVAC Technicians/Contractors ..........11 Suggestions to Aid You in Hiring an HVAC Contractor ................11 Introduction to Recessed Fan Coil Indoor Units .................. -
Page 3: Introduction
Refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs), may affect the ozone layer. Not all refrigerants have the same potential impact on the environment. YMGI Group advocates for the responsible handling of all refrigerants including industry replacements for CFCs such as HCFCs and HFCs. - Page 4 This document and the information contained therein are the sole property of YMGI Group and shall not be used or reproduced in whole or in part, without the written permission of YMGI Group. YMGI Group reserves the right to revise this manual at any time and to make changes to its content without obligation to notify anyone about any modifications, revisions or changes.
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Page 5: Note From Ymgi - Must Read
YMGI Group is the MEDIA AUTHORITY: YMGI Group, located in O'Fallon, MO 63366 is the author of all media produced for its products and is the only party able to give any additional explanation for any data, definitions and or descriptions found within any of its media, including but not limited to YMGI product brochures, manuals, pamphlets, catalogs, and videos. - Page 6 In an effort to help protect our customers from possible faulty installations that can lead to premature unit failure, YMGI provides the above information for you and the technician. You can observe while your system is being installed, even though your observation is not a guarantee your system is being or has been installed properly and professionally.
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Page 7: Installing Technician/Contractor's Responsibilities
You will be solely responsible for the entire installation that you have been contracted. Make sure you have all the materials you need to properly, completely and correctly finish the installation. The YMGI units and accessories may be just a portion of what you will need for the project. When support issues arise, remember YMGI employees and YMGI distributors/sales, dealers and agents are not installers and may only provide suggestions. -
Page 8: Limited Product Warranty
Compressor: YMGI will warrant the compressor of an YMGI-validated and approved warranty filing, for a period of 7 years from the date of successful installation at its original installation location. Parts: YMGI will warrant parts of an YMGI-validated and approved warranty filing, for two years from the date of successful installation at original installation location. - Page 9 YMGI Technical support the exact part(s) needed to fix the problem(s). 2. YMGI will check the customer's warranty filing. There will be no charge for Parts with a validated and approved warranty. Any Parts that have not been validated and approved or have an invalid warranty filing resulting in an unapproved warranty request, will be charged accordingly.
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Page 10: Limited Product Warranty Registration Card
YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 11: 100% By Currently Licensed Or Certified Hvac Technicians/Contractors
6. Some contractors/technicians may not feel comfortable about installing equipment that has been purchased by someone other than themselves. They prefer to purchase and install the equipment themselves. You can contact YMGI directly to check and see if there are contractors in your area who have installed our products or any similar products. - Page 12 YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service the unit. Improper repairs or servicing can result in electric shock or fire hazards. Please contact YMGI Group if you need help locating a qualified repair or service technician.
- Page 13 YMGI: Your Modern Green Idea YMGI Group will not be responsible for any personal injury or any property damage caused by improper or incorrect installation, improper service or maintenance or by not following the instructions listed in this manual. DO NOT pull on the power supply cords or refrigeration lines that are connected to the indoor and outdoor units.
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Page 14: Introduction To Recessed Fan Coil Indoor Units
Otherwise, these electrical appliances may have image interference and noise. (Even if the distance is 39- 3/8 in. (1m), when there is strong electric wave, noise may still occur.) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 15: Unit Clearances
2. Improper installation will affect unit’s performance, so do not install the unit by yourself. Please contact local dealer to arrange professional technicians for the installation. Do not connect power until all installation work is finished. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 16: Wiring Requirements
4. Install cut-off device near the unit. The minimum distance between each stage of cut-off device should be 1/8 in. (3 mm) (The same for both indoor unit and outdoor unit). YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 17: Recommended Tools For Installation
Cable Ties Black Tape for Electrical Use Electrical Meter 4) Trial Running Units and Inspection Clamp Meter (Not Shown) Manifold InfraRed Thermometer (Not Shown) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 18: Unit Dimensions
11-13/16” 29-11/16” 27-9/16” 27-9/16” WMMS-12EF-M2B(59)4 (740) (500) (830) (300) (754) (700) (700 WMMS-18EF-M2B(59)4 44-1/2” 39-3/8” 40-15/16” 19-11/16” 11-13/16” 29-11/16” 27-9/16” WMMS-21EF-M2B(59)4 (1130) (1000) (1040) (500) (300) (754) (700 WMMS-24EF-M2B(59)4 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 19: Hanging The Indoor Unit
The washer fixing plate will prevent the washer from falling. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 20 After the indoor unit is installed, remember to check the horizontal status of the whole unit. It should be horizontal from front to back and slant 1% from left to right, following the drainage direction. 5. Remove the washer locating plate and then tighten the nut on it. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 21: Refrigerant Pipe Connection
When the drainage pipelines are used for several units, the position of pipeline should be about 4 in. (100mm) lower than the drainage port of each unit. In this case, thicker pipes should be applied. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 22 5. Install the trap as shown in the illustration below. 6. Install one trap for each unit. Convenience for cleaning trap in the future should be considered when installing it. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 23 10. Drain pipes should have a downward slope of at least 1%~2%, in order to prevent pipes from sagging, install hanger bracket at intervals of 39-3/8~59 in. (1000~1500 mm). YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 24: Testing The Drainage System
2. Check if the water drains smoothly from the drain pipe and check if there is water leakage on the connection pipe. 3. Arrange insulation of drain hose and pipe clamp after checking the drain system. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 25: Installation Of The Air Duct
Size of Air-return Opening Model WMMS-09EF-M2B(59)4 7-5/8” 1” 10-3/8” 26” 1-1/8” 17-3/4” WMMS-12EF-M2B(59)4 (451 mm) (195 (264 (660 WMMS-18EF-M2B(59)4 7-5/8” 37-3/4” 29-9/16” 1” 10-3/8” 1-1/8” WMMS-21EF-M2B(59)4 (751 mm) (195 (960 (264 WMMS-24EF-M2B(59)4 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 26 YMGI: Your Modern Green Idea Installation of Air-out Duct Name Name Hanger Rod Static Pressure Box Return Air Duct Filter Canvas Duct Main Supply Air Duct Return Air Inlet Supply Air Outlet YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 27: Installation Of The Return Air Duct
5. The installation method can be chosen with considering the conditions of the building and maintenance etc., as shown in the illustration below. Name Name Return Air Inlet (with filter) Indoor unit Canvas Duct Supply Air Duct Return Air Duct Grille YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 28: Installation Of The Fresh Air Pipe
Please refer to User Manual of Wired Controller for the installation details. When installation is finished, the unit must be tested and debugged before operation. Please refer to Instruction Manual of ODU for auto addressing and debugging details. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 29: Wiring Connections
Loosen the wiring screws on terminal board. c. Insert the wire into the ring tongue terminal and tighten with a crimping tool. d. Use a screwdriver for securing the wire to the terminal. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 30 2. Place the signal line going through the rubber ring. 3. Insert the signal line to the four-pin socket on the printed circuit board of the indoor unit. 4. Secure the signal line with the binding wire. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Page 31: Setting The External Static Pressure
0.60” 0.16” pressure (wc) Applicable to: 18K/21K/24K Static pressure notch for indoor fan External static pressure (Pa) External static 0” 0.12” 0.24” 0.36” 0.48” 0.60” 0.72” 0.80” pressure (wc) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 32: Routine Maintenance
2. If the unit will not be used for a prolonged period of time, please cut off power supply at the circuit breaker to save energy. Characters and icons on the wired controller screen will disappear after turning off the power supply. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 33: Error Codes
IPM Module protection, could be caused by over-charged refrigerant/high pressure (bad manifold gauge), restricted refrigerant flow or kinks on refrigerant pipes. No feedback of indoor fan motor Zero-crossing protection Jumper cap malfunction protection Loading EEPROM malfunction YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 34: Troubleshooting Prior To Contacting Your Technician
If air conditioner fails to work normally after checking and performing the steps described above, please turn the system off immediately and contact a local service center for assistance. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! -
Page 35: User Notes And Installation/Service/Maintenance Notes
USER NOTES AND INSTALLATION/SERVICE/MAINTENANCE NOTES INSTALLATION NOTES Record any questions or issues you have seen far a unit history: Asked Your Did You Ask YMGI Date Notes Technician for Help? Tech. for Help? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! - Page 36 Record any questions or issues you have seen far a unit history: Installation Company Name, Technician Job Not Performed Technician Checklist Date Name, Phone & HVAC License # by Technician Completed Fully? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 37 SERVICE / MAINTENANCE NOTES Record any questions or issues you have seen far a unit history: Company Name, Technician Name Date Service or Maintenance Performed Phone & HVAC License # YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 38 YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 39 YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
- Page 40 YMGI: Your Modern Green Idea YMGI is dedicated to designing, manufacturing and distributing the highest quality, energy saving and environmentally friendly air conditioner and heat pump products, while providing the best service and support to all of our customers. Our mission is to help build a sustainable, efficient and green world.
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