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YMGI • Your Modern Green Idea 

 

YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World! 

 

 

 

11 

WHY DOES YMGI GROUP REQUIRE INSTALLATION AND SERVICE TO BE PERFORMED 100% 

BY CURRENTLY LICENSED OR CERTIFIED HVAC TECHNICIANS/CONTRACTORS? 

 

 

Expertise and Safety: 

 

They have the training and experience to accurately and safely install and service your equipment. The equipment runs 

with high-pressure refrigerant, oil and electrical current. The copper lines must be installed properly to prevent leakage 
and foreign substances from contaminating the refrigerant system.  

 

You will save money in the long run:

  

If any problem occurs with the unit that has been fully installed by a currently licensed or certified technician/contractor, 

contact the original licensed or certified HVAC technician to evaluate the unit as they have the training and experience 
to correct the problem quickly and efficiently. A technician may be unwilling to repair an issue on a unit that they did not 
install. If you do find a technician willing to perform this service, there is an increased possibility of higher service fees, 
increased service visits, or delayed service from that technician.  

 

It's the law!

  

The  federal,  state  and/or  local  government  and  authorities  have  various  governing  laws  or  regulations,  guidelines, 

ordinances, etc. These laws may require only licensed or certified professionals can install and service this type of high 
pressure HVAC equipment.  

 

 

SUGGESTIONS TO AID YOU IN HIRING AN HVAC CONTRACTOR: 

 

 

Hire a currently practicing, licensed/certified HVAC professional technician/contractor. Technicians, who are no longer 
practicing (retired, etc.) in this field, may not have current technical knowledge or may lack experience on the equipment 
you have purchased.  

 

Hiring a licensed technician to install your unit as a "side job" rather than a licensed HVAC company may pose possible 
risk.  This  may  result  in  an  incomplete  or  unsatisfactory  installation,  no  guarantee  for  workmanship  and  lack  of 
maintenance and further service to your unit.  

 

Hire a technician/contractor who services customers in your local area and one you are familiar with. Local contractors 
have a faster response time and it will be easier for you to determine if they are reputable.  

 

Use only a reputable licensed/certified HVAC installation professional to prevent any unexpected charges because of 
unethical business practices.  

 

Check  their  references,  verify  they  provide  professional  service  for  their  customers.  N.A.T.E  or  A.C.C.A  certified 
technicians are strongly recommended.  

 

Some contractors/technicians may not feel comfortable installing equipment that has been purchased by someone other 
than 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.  

 

Ask for a detailed quote for the complete installation project. A flat rate quote is the safest contract for both you and the 
contractor.  

 

Local HVAC technicians may charge you on a project basis or on an hourly basis. It has been our general experience; 

a full single head installation normally can cost $800 to $1500

. These costs are estimates, and your actual costs 

may differ due to your specific job requirements and installation location.  

 

Number of hours can vary depending upon each individual situation, some factors are, but not limited to:  

• 

Difficulty or complexity of securely installing the indoor unit.  

• 

Difficulty or length of the inter-connecting pipes and wires to be installed.  

 

A successful installation is dependent on all these suggestions and necessary steps are followed.  

 

If  the  contractor(s)/technician(s)  are  experienced  with  the  systems/brands  you  purchased. 

You  might  save  on  the 

installation cost but remember to always ask for and verify references. 

 

 

The contracts should list and detail all work to be performed and the standards they will follow. Some contractors are 
willing to include a 1-year installation/service warranty at no extra charge. Check to see if this is an available option. If 
available, make sure it is included in the contract.  

 

Verify and confirm the installation is completed and all the unit functions have been tested and working properly. All 
items on the checklist should be checked and clearly marked in the warranty registration card/form, prior to paying the 
contractor in full.  

  

The cost of not having your unit professionally installed can be more expensive than the additional cost of hiring a certified 

contractor. Protect your investment and warranty eligibility by doing it right the first time.  

 

Summary of Contents for WMMS-12EC-V2B592

Page 1: ...ed 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 HVA...

Page 2: ...2 Brief Introduction to Ceiling Cassette Mini Split System 13 Indoor Unit Diagram 14 Specifications 15 Unit Dimensions 16 Wiring Connections 17 Recommended Tools 18 Installation Instructions 19 Instal...

Page 3: ...cessary to perform these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants HVAC R te...

Page 4: ...rized system installer or HVAC professional as soon as possible and provide the following information Data on the unit model number serial number and owner s name A detailed description of the unit s...

Page 5: ...turer may not require certified and licensed personnel to install Reading and following YMGI Group recommendations and requirements contained in the following pages and other documents is the first st...

Page 6: ...Not installing an oil P trap in the copper suction line where the indoor unit is located 18 feet or more below the outdoor unit 3 Cross piping and or cross wiring of any units including more than one...

Page 7: ...entifying marks on each pair of copper lines and wiring cable sets to keep from cross piping or cross wiring in multiple zone installations or where pipes for different single zone systems are close t...

Page 8: ...riginal installation location or 90 days as of original shipping date from YMGI Group whichever comes first This is a standard limited liability warranty and DOES NOT cover the following Any damage or...

Page 9: ...ranty request will be charged accordingly 3 YMGI will ground ship the parts ASAP Expedited shipping is available at the customer s expense 4 Replacement parts that have an approved warranty registrati...

Page 10: ...YMGI Your Modern Green Idea YMGI Engineered Comfort Products for A Sustainable and Efficient Green World 10...

Page 11: ...e and it will be easier for you to determine if they are reputable Use only a reputable licensed certified HVAC installation professional to prevent any unexpected charges because of unethical busines...

Page 12: ...ference between indoor and outdoor unit within 41 F 5 C YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service the unit Improper repairs or servicing...

Page 13: ...g or bracket kit is used some outdoor units can be stacked 2 or 3 units high depending upon unit size and applications Air is discharged horizontally quietly and smoothly These units are a perfect fit...

Page 14: ...YMGI Your Modern Green Idea YMGI Engineered Comfort Products for A Sustainable and Efficient Green World 14 Indoor Unit Diagram...

Page 15: ...aled by Dry Nitrogen Yes Yes Yes Flare Nut Liquid Gas 1 4 3 8 1 4 1 2 1 4 5 8 Drain Hose Connection OD In 1 22 1 22 1 22 Condensate Pump Installed Lift In Yes 25 Yes 25 Yes 25 Refrigerant Environmenta...

Page 16: ...W2 W3 W4 H H1 H2 H3 H4 WMMS 12EC V2B 59 2 25 19 32 25 19 32 23 5 8 23 5 8 16 3 8 2 1 2 9 3 32 7 1 16 1 27 32 4 3 8 5 5 32 WMMS 18EC V2B 59 2 25 19 32 25 19 32 22 13 32 22 13 32 16 3 8 2 1 2 9 3 32 7...

Page 17: ...Products for A Sustainable and Efficient Green World 17 Wiring Connections WMMS 12EC V2B 59 2 WMMS 18EC V2B 59 2 WMMS 24EC V2B 59 2 Model Power Supply MCA A MOP A WMMS 12EC V2B 59 2 208 230V 1ph 60Hz...

Page 18: ...evel Flash Light Screw Driver Phillips and Flat Hammer Knife Scissors Goggled Glasses Mask Gloves Ladder 2 Refrigeration Related Work Flat Surface Wrench Two Flare Nut Tool Set Hex Head Key Set Torch...

Page 19: ...t platform on the ground or bracket for the wall before or during construction and before installation Read installation instructions for all units thoroughly Ask rep distributor YMGI Group anything y...

Page 20: ...L 200 4 Washer 10 10 5 Paper template for installation 1 6 Screws 4 ST4 8 13 F Use for Paper pad for installation 7 Heat preservation Sponge for pipe 2 Encase the tie in 8 Big sealing pad 1 5 160 300...

Page 21: ...door unit and will not increase noise and vibration 4 Select a place easy to drain water and connect with the outdoor unit 5 Make sure there is enough space for maintenance and make sure the distance...

Page 22: ...se a level or vinyl hose filled with water to adjust the unit to level Tighten the bolts to a secure position INSTALLING DRAIN PIPE Install the drain pipe with a downward gradient 1 50 to 1 100 so the...

Page 23: ...HE GRILLE ASSEMBLY TO THE BODY Install the grille assembly to the body with the four bolts spring washers and washers Wireless unit connection wire wiring 1 Connect the connector in accordance with th...

Page 24: ...tward 2 Removing the intake grille 1 Slide the two grille stoppers inward and then open the intake grill 2 Remove the grille hook screws and then open the intake grille 1 The louver angle cannot be ch...

Page 25: ...both inside and outside with refrigerating machine oil and initially tighten by hand 3 or 4 turns Check the pipe connector for gas leaks then insulate it as shown in the drawing below Use sealing pad...

Page 26: ...ire at both indoor unit and outdoor unit wiring terminal Notes The temperature of refrigerant circuit will be high please keep the interconnection cable away from the copper tube An all pole disconnec...

Page 27: ...For the following items take special care during construction and check after installation is finished Items to check If not properly done what is likely to happen Check Is the indoor unit fixed firml...

Page 28: ...iron wire or copper wire may cause the unit to break down or could potentially cause fire Do not check or attempt to repair the unit while it is operating Serious injury or property damage may result...

Page 29: ...ransmitting any noise to walls cabinets etc Pipe length not to exceed 150 feet elevation not to exceed 35 feet Insulate both the liquid and gas copper lines with at least 3 8 inch thick insulation tub...

Page 30: ...er damage to it Fix the pipe combination securely on the external wall with proper clamps 6 feet apart Fill the gap between the wall hole and wall sleeve with putty to keep rain or dust entering insid...

Page 31: ...ice valves remain front seated Turn off manifold valve low to check if the vacuum level is maintained for a minimum of 60 minutes Be certain there is no pressure in the system when repairing a leak Va...

Page 32: ...YMGI Your Modern Green Idea YMGI Engineered Comfort Products for A Sustainable and Efficient Green World 32...

Page 33: ...f in HEAT mode the Indoor Unit will continue to run and blow residual heat out before powering off completely Indoor fan motor will stop when the unit is in DEFROST MODE or the system need to perform...

Page 34: ...d will shift every 3 5 minutes Sleep Function In COOLING and FAN modes the SLEEP function works as follows During the 1st Hour the Set Temperature will be allowed to increase 1 F In the 2nd Hour the T...

Page 35: ...see the word OFF is not displayed next to the current time on the CLOCK the TIMER OFF function is inactive When both times are set on your REMOTE you will see ON OFF next to the CLOCK on the REMOTE C...

Page 36: ...Function is turned on while the fan is running on the Indoor Unit Unit Display The Display on the Indoor Unit will only show current settings when the LIGHT function is turned ON If the Indoor Unit s...

Page 37: ...mes Communication malfunction E6 Blink 6 times Defrost or heating oil return H1 Blink once The indoor ambient temperature sensor is open short circuit F1 Blink once Any indoor evaporator temperature s...

Page 38: ...he distance between signal sender and receiving window should be no more than 8m and there should be no obstacles between them Signal may be experience interference in rooms where there are fluorescen...

Page 39: ...emove the two screws Slide both knobs simultaneously towards center as shown and then pull them downward slowly 2 Remove the air filters Slide knobs on the back of the air intake grille outward and re...

Page 40: ...e Attention Do not wash with hot water 5 Replace the air filter 6 Replace the grille 7 Close the suction grille NOTE Never use water hotter than 113 F to wash the unit or the filters as this can disco...

Page 41: ...the parts that will need to be replaced and bring tools with you for maintenance Step 3 You should not only bring the common tools such as screwdrivers wrenches etc but also you should bring universal...

Page 42: ...rate when Restart right after stopping Once the unit is stopped it stays idle for about 3 minutes to protect the compressor and the unit from any potential damage Press SET TEMP and then release immed...

Page 43: ...ix times 7 Unit modes conflict Seven times 8 Jumper malfunction Fifteen times 9 Defrosting Heating oil return Blink once 10 Compressor overload protection unit stop Three times 11 System Unit malfunct...

Page 44: ...4 5 Over current protection unit stop E5 6 Communication malfunction unit stop E6 7 Unit modes conflict E3 8 Jumper malfunction E3 9 Defrosting Heating oil return Defrost 10 Compressor overload protec...

Page 45: ...H3 Yes E5 11 System is abnormal Blink 4 times H4 No F4 12 Module protection Blink 5 times H5 No E3 13 PFC protection Blink 6 times HC No E5 14 Out of step malfunction of compressor including erase ma...

Page 46: ...connection malfunction at WATER D on main board or the water overflow switch is bad Please check or replace it 3 Indoor ambient temperature sensor is open circuit or short circuit Blink once F1 F0 The...

Page 47: ...seen as a unit history No Date Notes Asked Your Technician for Help Contact YMGI Tech for Help USER NOTES Put down whatever questions you have or problems you have seen as a unit history No Date Insta...

Page 48: ...8 16 and 24 Ton Symphony SOLO DC Inverter 57 2 3 Single Zone 16 SEER 09 36K Btu h 58 4 78 1 Single Zone 18 23 SEER 09 36K Btu h Symphony CHOIR DC Inverter 46 2 DC Inverter Multiple Zone 15 SEER 2x09K...

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