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YMGI • Your Modern Green Idea 

 

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

 

 

 

INSTALLING TECHNICIAN/CONTRACTOR'S RESPONSIBILITIES

 

 

 

Discuss  with  the  customer  detailed  information  about  the  structure  to  be  conditioned,  local  weather  (typical  design,  extreme 
temperature/humidity conditions, cooling and heating hours), previous and existing HVAC  equipment (if any), usage and depende nce on 
new HVAC equipment or YMGI products. 

 

 

Performing a cooling/heating load calculation by using commercially available professional programs/methods such as Right -J (Manual J) 
for residential HVAC applications and Right-CommLoad (ASHRAE RTS/CLTD) for light commercial and commercial HVAC applications. 

 

 

Contact  your  YMGI  distributor/sales  department  or  contact  YMGI  directly  to  obtain  additional  information  to  fully  understand  your  YMGI 
products, including but not limited to product features, cooling/heating performance at standard ratings/conditions and extreme conditions, 
allowed indoor and outdoor temperature and humidity ranges, installation, operation, maintenance, service, warranty, parts and any other 
issues pertaining to YMGI products. 

 

 

Select the correct (most suitable) YMGI product unit models and accessories necessary for your HVAC applications and list them in the 
proposal/quote, in writing, on company's quotation form or letter head, based upon the information you collected from 1, 2 and 3 listed above. 
5. List your currently valid HVAC license number and EPA number in your proposal/quote. 

 

 

Make sure you are the only party to perform the entire installation and you will not sub-contract any part of the installation to any non-licensed 
parties or persons. 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. You are the only one qualified to determine what 
other materials you need to complete the installation. 

 

 

When connecting electrical wires, follow all NEC, state and local codes and ensure the installation of all YMGI units and acc essories meet 
these requirements. 

 

 

Connect the unit to a correctly sized electrical power source. If the unit is installed in an area where lightning or storms occur frequently, a 
correctly sized and type of power surge protector must be installed between the outdoor unit and the power source. 

 

  Select the correct types and sizes of HVAC circuit breakers, disconnect switch boxes, wires and conduit from circuit breaker to disconnect 

box and then from disconnect box to outdoor unit. 

 

  Select the proper location for installing indoor units and outdoor units with all factory requirements being followed (cooling/heating air inlets 

and outlets are not blocked, or restricted, mounting structure is secure, installation for convenience is considered, allow adequate clearance 
for maintenance/service and all applicable codes are met). 

 

  Cap/tape the two ends of every copper line before running them through any structure to keep any foreign substances from entering the 

copper line causing contamination. Label the copper lines A-A, B-B, C-C, D-D, or any other identifying 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 to one another. 

 

  Secure the wiring cables that connect between the indoor unit and outdoor unit, following all applicable NEC, state and local codes for your 

installation. If there are no special NEC, state or local codes to govern how these wires are to be installed, you can tape/cable tie them along 
with insulated copper line. 

 

  Tighten all pipe and wire connections ensuring there is no leakage or false/loose connections. 

 

  Conduct a positive pressure leakage test, checking each of the inter-connecting copper lines between each indoor unit and outdoor unit by 

charging  with  dry-nitrogen  at  th

e  outdoor  unit’s  service  port  (

NOTE:

 

do  not  back-seat  stopping  valve

).  A  liquid  soap  solution  shall  be 

applied at all pipe connections to check for leakage. A 1/4” - 5/16” hose/valve adaptor may be needed if you have a 1/4” traditional manifold 
hose connection. 

 

  If there is no positive leaking, then conduct a negative pressure leakage test, checking all inter-connecting copper lines between each indoor 

unit and outdoor unit by pulling vacuum at the outdoor unit’s service port (

NOTE: do not back-seat stopping valve

) and checking that a 

vacuum level of 500 Microns can be held for at least 60 minutes. 

 

 

If there is no leakage found at any of the refrigeration pipe connections, flip up the indoor unit’s face panel and remove its filter, carefully pour 
some clear water onto the up-

right aluminum coil surface to test if the water can drain freely out of each of the indoor unit’s without finding 

any leakage. 

 

  If there is water leakage found, locate the source of the leak and correct it. Only after everything is clear and all the necessary inspections 

made, engage the correct electrical power to the system. 

 

  Then back-seat stopping valves of the outdoor unit to release refrigerant from the outdoor unit into the inter-connecting pipes and the indoor 

unit. 

 

  Make sure both the indoor unit and outdoor unit are powered on correctly, operating the indoor unit in fan mode first. Then move on to test 

cooling, dehumidifying/drying, heating and other modes. 

 

  Read refrigerant pressures and pipe/valve temperatures only after the system is stabilized (normally 10 minutes after cooling/heating mode 

is started successfully). Record this data into the technician checklist in the lower half section of the Limited Product War ranty Registration 
Card/Form. 

 

  Adjust  refrigerant  charging  level  (remove  refrigerant  if  pipe  is  shorter,  the  temperature  is  colder;  add  refrigerant  if  pipe  is  longer  the 

temperature  is  warmer),  following  the  manufacturer's  instructions.  If  the  average  pipe  length  is  shorter  or  longer  than  25'  a nd 
pressure/temperature readings at the outdoor unit service valves are not falling into normal ranges. 

 

  Explain to the user/owner about proper unit operation and maintenance. Leave your contact information to allow them to reach  you. If the 

customer finds the unit does not work properly and cannot resolve the issue themselves, check the customer's units/parts/accessories and 
correct the issue if there is one. Communicate with YMGI-technical support line at (866)833-3138 x 703, if further help if necessary. 

 

 

 

Following these requirements will aid in ensuring that the units to be installed meet general HVAC practicing standards and necessary factory 
requirements. Finding any possible problems early and preventing any further damage to the unit will help to ensure a properly working unit 
for many years.

  

 

 

Содержание WMMS-12EC-V2B592

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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