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W

ARRANTY

 POLICIES 

AND REGISTRA

TION 

CARD/FORM

WARRANTY AND TECH.SUPPORT

YMGI warrants to the purchaser/owner(s) that YMGI products be free from defects in 
workmanship under the normal use and maintenance, with the standard Limited Product Warranty 
Policies that comes with the unit or sales package.

material and 

YMGI IS NOT RESPONSIBLE FOR

CONTACT FOR FIELD SERVICE OR REPAIR

The following people, in a prioritized sequence, will take care of your request or issue:
1) The original installer; otherwise,
2) Your current service contractor; otherwise,
3) Authorized contractor in YMGI list that is close to you; otherwise,
4) Authorized Distributor in YMGI Distributor list; otherwise,
5) Contractor/Distributor you prefer who is close to you.

CONTACT FOR GENERAL TECHNICAL QUESTIONS OR SUPPORT, IN A SEQUENCE:

1) The original installer; otherwise,
2) The current service contractor; otherwise,

3) The distributor; where the unit is purchased from otherwise,
4) YMGI Technical Support:
    Tel: (866) 833-3138*703          Email: [email protected]

* Regular equipment maintenance or field service or field inspection.

* Damage or repairs required as a consequence Customer do-it-yoursely(DIY) installation and/or any other faulty 
   installation or improper application.

* Failure to start due to voltage conditions, blown fuses, open circuit breakers, or other damages due to the 
  inadequacy or interruption of electrical service.

* Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing, unauthorized 
  alteration, or improper operation.
* Damage as a result of floods, winds, fires, lightening, accidents, corrosive atmosphere, or other conditions 
  beyond the control of YMGI.

* Parts not supplied or designated by YMGI.
* Products installed outside USA or Canada.

* Any damages to person or property of whatever kind, direct or indirect, special or consequential, whether 
  resulting from use or loss of use of the product.

The original licensed installer or current service contractor should be contacted first of all, since they installed 
the unit and/or know more details than anybody else.
They will check the unit and find out the problems with the professional knowledge about HVAC and electric 
product installation by using special tools or instrument.
They can contact YMGI technical support for technical help during unit installation or inspection.
Product model and serial numbers needed, which can be found on unit nameplate sticker, so that our 
technician can quickly identify the unit, parts and wiring diagrams, among our many products and models.

* Any problems due to improper cooling and heating load calcuation of the room/building the air conditioner/heat 
  pump system is to be installed. Equipment users can get the calculation schedule from your room/building 
  architect or your installation or related service HVAC contractor, who should have the knowledge and the tools 
  to do these calculations correctly.
* Any problems due to improper sizing and selecting air conditioner/heat pump system. These equipment sizing 
  and selection work should be conducted by either your room/building architect or your installation or related 
  service HVAC contractor, who should have the knowledge and the tools to do these calculations correctly, and 
  get your approval, before purchasing the air conditioner or heat pump equipment.
* Any problems due to improper installing of the air conditioner/heat pump system. Installation should be 
  conducted by currently licensed HVAC technician, following manufacturer installation instructions, all governing 
  safety codes, with care and professionalism. 
* Any problems due to improper operation of the air conditioner/heat pump system. Users shall keep the manual 
  and refer to it for the correct understanding of how the unit will work and how to operate the unit correctly.
* Any problems due to improper maintenance of the air conditioner/heat pump system. Like a car, regular 
  maintenance or yearly checking is necessary for the unit to work properly for you, before the season comes. For 
  example, air filter shall be checked for cleaness from time to time. Remote control batteries shall be checked for 
  enough power, before judging the unit is not working...

P7 OF 32

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

P8 OF 32

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

* It is very strict that the refrigerant pipes should be clean and dry.
* The R410A is a mixed refrigerant, when add the refrigerant to the unit, it must keep the refrigerant in its liquid 
  state. If the refrigerant is in gas state, the composition has been changed and the capability of the unit will 
  decrease.
* When the refrigerant is leak out, please do not touch the leakage. Otherwise, it will result in frostbite.
* It does not support to let a lot of refrigerant go into the ambient atmosphere, because it will strengthen the 
  green house effect. Otherwise, it will produce toxic gas when the refrigerant contacts with the fire.

ATTENTION FOR INSTALLATION

PRECAUTIONS FOR R410A

The unit is 

i

s more than 

240 lbs

, so more than two pe

ople

 will be needed to move the unit. 

Do not lift by packaging

.

* When remov

ing

 

packaging

, place the hands on the corner

s

 and 

be careful

 not to 

cut

 hands 

on

 the fins.

D

ispose 

of 

the 

packaging

to 

in a

 garbage bin after the installation.

PRECAUTION FOR INSTALLATION

In order to protect the compressor from vibrating during transportation 2 metal gaskets are used. They must 
be removed prior to commissioning and 

re

ti

ghten

 the nut

s

 firmly; otherwise the unit 

may

 not operate well.

PRECAUTION FOR OPERATION TEST

ACCESSORIES

The accessories of the unit, please look out the Packing List in the package.

The

 Super

 Match System adopts inverter compressor technology. According to change 

displacement of compressor, stepless capacity regulation within range of 10%~150% can be realized. 
Various product line-up is provided with capacity up to 90,000 Btu , which can be widely used in 
residential, light commercial, institutional and some industrial applications with variable load change. YMGI 
commercial air conditioner is absolutely your best choice.

 YMGI

 Any

 PRODUCT INTRODUCTION

NAMES OF MAIN PARTS

NO.

Name

Fan 

motor

Axial flow 

fan blade

Electrical 

box

Gas side 

stop valve

Liquid side 

stop valve

COMBINATIONS FOR OUTDOOR 
AND INDOOR UNITS

Sorts

No. of indoor units to 

be connected

Min

2

2

 Max

 8

9

Total capacity of indoor units 

to be connected(Btu/h)

WMMS-80CH

-V2B(59)2 

WMMS-90CH

-V2B(59)2 

 Max

Min

 24000

 28000

80000

90000

Intake air

Intake air

Intake air

Discharge air

Discharge air

BRIEF UNIT INFO

Summary of Contents for SYMPHONY CHOIR 80CH

Page 1: ... Installation operation maintenance and service shall follow professional practices for regular cooling and heating equipment NEC State City or Local Codes and related manuals from us Otherwise damage to equipment or property even injury to people may occur Installer Currently licensed HVAC installer only Read this manual before installation Sign on the warranty registration card User Keep this ma...

Page 2: ...ORTANT NOTE YMGI HOLDS FINAL EXPLANATION The quality of the installation plays a key role in whether the units will work well and for an extended period of time The information we provide in our manuals is for the sole purpose of reminding you and your installer It is our ultimate goal to help insure that your YMGI units are installed properly and correctly from the very beginning to the very end ...

Page 3: ...re humidity ranges installation operation maintenance service warranty parts and so on 4 Properly select correct most suitable YMGI product models of units and accessories for your HVAC applications jobs and list them in your proposal quote in writing on your company s quote form or letter head basing upon the information you get from 1 2 and 3 above 5 List your currently valid HVAC license and EP...

Page 4: ... the installation 5 Supply electrical power V Ph Hz measured at wiring terminal block of Indoor unit outdoor unit 7 Wire gauge length and terminal colors between circuit breaker disconnect switch to outdoor unit 9 The size of HVAC circuit breaker fuse or disconnect switch to the outdoor unit 11 What is the refrigerant pipe length between each indoor unit and the outdoor unit Unit A Unit B Unit C U...

Page 5: ... the tools to do these calculations correctly and get your approval before purchasing the air conditioner or heat pump equipment Any problems due to improper installing of the air conditioner heat pump system Installation should be conducted by currently licensed HVAC technician following manufacturer installation instructions all governing safety codes with care and professionalism Any problems d...

Page 6: ...the appointed service center A place which is full of machine oil A region with saline sodic soil near the sea A place where the sulphide fog exists such as the sulphur spring A place where the high frequency facilities exist such as radio equipment electric welder and medical equipment An environment with special conditions 1 When the place of the installation is exposed to strong wind When stron...

Page 7: ...is strength and level so that the unit will not cause any operating vibration or noise after installation 2 In accordance with the foundation drawing in the Fig 6 please drill 4 holes in the installation location A Discharge air side B Bottom view inches C Drain holes 3 Fix the unit securely with the foundation bolts You can get the M10 or M8 foundation bolts nuts and washers from the market 4 Rub...

Page 8: ...RANT PIPES Y type branch pipe must be installed in vertical or horizontal direction In the inlet of the branch pipe keep at least 19 69inch straight pipe 1 Pipe connections should be follow the following rules Outdoor unit shall be installed close to the indoor unit hence to minimize the length and bends of connection pipes The gap of outdoor unit and indoor units should be as small as possible Th...

Page 9: ...e operation 2 As shown in the following figure expel the gas from the refrigerant pipes by the vacuum pump 3 Open the pump and turn on the knobs to evacuate the gas in the liquid and gas pipes 4 When the pressure of the system is less than 0 1Mpa 1bar keep the system for more than one hour under the condition 5 Then turn off the knobs and the pump and if the pressure of the pressure vacuum gauge d...

Page 10: ...sure vacuum gauge 6 7 8 9 Hi knob Lo knob R410A tank Scale When the liquid and gas stop valves have not been opened the system is under the vacuum 1 Refer to the left of the Fig 20 connect the R410A tank to the system 2 Turn on the R410A tank and the Hi knob charge the R410A refrigerant into the system from the liquid side stop valve The Lo knob should be closed completely 3 Turn off the R410A tan...

Page 11: ...ground terminal should be provided and the ground wire cannot be connected to any of the following places a Water pipe b Coal gas pipe c Sewage pipe d Lightning rod e Telephone line f Other unreliable places considered by a professional ELECTRICAL WIRING WORK The ground connection should be reliable and the ground wire should be connected to the dedicated device of the building by the professional...

Page 12: ... or outdoor unit is blocked Remove the obstacles Air inlet or outlet of indoor unit or outdoor unit is blocked Remove the obstacles Temperature setting is improper Adjust the setting of remote controller or wire controller Air speed is set too low Adjust the setting of remote controller or wire controller Improper airflow direction Adjust the setting of remote controller or wire controller Door or...

Page 13: ... board of the outdoor unit Check for more details about the meaning of each error Conditions Causes When restart the unit soon after it is stopped The overload protection switch of the unit let the startup delayed for three minutes As soon as power supply is on The unit will stand by for approximate one minute When the cooling operation starts The hi humidity air indoor is cooled quickly The unit ...

Page 14: ...ing to include a 1 year installation service warranty at no extra charge Check with them to see if that is available If available include that in the contract 14 Verify and confirm the installation is done completely and all the unit functions have been checked and are working properly all the items in the checklist have been checked and marked well in the warranty registration card form prior to ...

Page 15: ...e exceptions Most have resulted in equipment failure due to lack of knowledge and experience A few of the problems result from DIY s lack of knowledge in the following areas Sizing and selecting correct type size and model of cooling and or heating equipment Sizing and installing correct electric circuit breakers and wires Wiring the units correctly and properly Taping the ends connecting to indoo...

Page 16: ...different from what are typical in traditional split type air conditioning and heat pump systems and similar systems made by other manufacturers These are not defects Take some time to learn the functions of your unit We will be happy to assist you with any questions you may have concerning the functions of your new unit 1 Part repair or replacement after trouble shooting This is the most common a...

Page 17: ...ND INSTALLATION SERVICE MAINTENANCE NOTES Notes Asked for Your Technician for Help Did You Ask YMGI Tech for Help INSTALLATION NOTES Original Installation Company Name Technician Name Phone HVAC License Job Not Performed by Technician Technician Checklist Completed Fully SERVICE MAINTENANCE NOTES No Date Contents of Service Maintenance Technician s Company Name Technician Name Phone HVAC License P...

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