YMGI WMMS-09C-V2A/B(58) 2 Installation Instructions Manual Download Page 13

* To be installed at the position where the air 
  delivered from the unit can reach every comer of 
  the room.
* To avoid being affected by the outdoor air.
* To avoid blockage to the air inlet or outlet of the unit.
* To avoid too much oil, smoke or steam.
* To avoid possible generation, inflow, lingering or 
  leakage of flammable gases.
* To avoid high-frequency facilities (such as high 
  frequency arc welders, etc.).
* To avoid the places where acid solutions are 
  frequently used.
* To avoid the places where some special sprayers 
  (sulfides) are frequently used.

* Not to install on top of the musical instruments, TV, 
  computer etc. valuable appliance.
* Not to install a fire alarming device near the air 
  outlet of the unit (during operation, the fire alarm 
  device might be erroneously triggered by the warm 
  air from the unit).

All Units Shall Be Installed by Licensed Contractor or Technician.

Read Manuals before Installation.

Check the unit for damage and missed parts or accessories. If damage is found or parts are found missing, call 
the distributor right away.
Spin fan wheels 

 blades to check and make sure they can rotate freely. If fan wheel scratches with housing, 

call the distributor right away and do not to proceed with the installation before it is fixed.

and

Check the unit to make sure no foreign materials 

 been left in the unit.

have

Check all the parts and accessories that are needed other than those provided with the unit. 
It is strongly recommended to only use YMGI supplied or recommended parts and accessories.
Be sure a properly sized circuit breaker is for the electric power to the units.
Pre-build the support platform on the ground or bracket for the wall before or during construction and before 
installation. Refer to the table below for footprint dimensions.
Read installation instructions of all units thoroughly.
Ask rep./distributor/us anything you are not sure about.
Get your tools and parts ready for installation.

CAUTION & SUGGESTIONS TO FOLLOW PRIOR TO INSTALLATION

* Either the indoor unit or the outdoor unit can be 
  higher, but the height difference must comply the 
  stated requirements.
* Try to reduce the bending of the piping line as much 
  as possible so as to avoid possible negative impacts 
  upon the performances of the units.
* Make P-trap if elevation drop difference is more 
  than 25", as illustrated below.  

Indoor unit

Outdoor unit

Lift

Indoor unit

Outdoor unit

Drop

Oil-Trap

18 Ft

Locate the central hole at the stud (firn structure)

At least 6"

6" or more 
from sidewall

Respect the slope

Plumb

Mounting Plate

Anchors of self-
tappping screw

6" or 

more from 

sidewall

Install Mounting Plate and Drill Hole for Combination of Copper Line/Wire Cable/Drain Hose

NOTES: 

Anchors must be put into the holes, where the solid 
arrows are pointing, as shown above, to secure the 
mounting plate firmly and to hold the weight of indoor 
unit. If more screws/anchors are to be used, make 
sure to keep the two holes close to each other, at 
least 2 inches apart.

Mounting plate should be attached to the structural 
part of the wall. Minimum clearance, as shown below, 
is required in order to ensure proper airflow and 
enough service room.

      INSTALL WALL MOUNT PLATE

* Check unit to make sure the unit is   good shape and ready to install.

in

* Check unit to make sure the installation location is firm enough to hold the weight of the whole unit and is 
  convenient to install, maintain, and service.

* Install Indoor unit. Enough anchor bolts/nuts shall be used to secure mounting plates for indoor units. 
  Brackets should be at level position.

Mark drill positions. At least 4 anchor holes, one at each perimeter corner of the plate are needed to secure the 
plate, where the bold arrows are pointing, as shown in the picture above. Refer to the specification sheet for 
unit weight so that enough anchors are installed at proper positions.

Pre-drill guiding holes where are marked for anchors or screws on the wall

Confirm the position of the holes and finish drill to the depth needed for anchors (NOT for screws)

Align mounting plate holes with those holes drilled on the wall and put anchors or screws into the holes to 
secure mounting plate.

STEPS TO MOUNT PLATE:

a

b

c

Drill mounting holes 
to make sure at least 
either one of three 
dimensions a, b and 
c is 16" center to 
center.

INSTALLATION-INDOOR UNIT

INSTALLATION POSITIONS FOR OUTDOOR UNIT

INSTALLATION LOCATIONS & CAUTIONS

If pipes need to come out of the right side (facing 
the front of indoor unit) of the indoor unit, snap off 
portion

1

on plastic casing.

If pipes need to come out of the bottom side 
(facing the front of indoor unit) of the indoor unit, 
snap off portion

2

on plastic casing.

If pipes need to come out of the left side (facing 
the front of indoor unit) of the indoor unit, snap off 
portion

3

on plastic casing.

DRILL 3IN HOLE FOR PIPING/WIRING/DRAIN

Locate the 

 where the hole will need to 

drilled.

center

Drill the holes of 2.5-3Inch diameter. A down pitch 
about 1/4" per foot, as illustrated below, is needed 
for the hole, in order to drain the condensate 
properly.

PREPARE INDOOR UNIT- COPPER LINE SET/DRAIN HOSE

1

2

3

INST

ALLER'S 

INSTRUCTION

INST

ALLER'S 

INSTRUCTION

P23 OF 38

P24 OF 38

* The location and structure shall also be convenient for both installation and service.
* The location shall NOT be where discharge air and noise could bother your neighbor.

* The location shall NOT be somewhere drain may cause any damage to property or bother the neighbor.

* The location shall NOT be somewhere soldering or torching work  may cause fire or smoke to the materials around.

* The location shall NOT be somewhere near flammable gases.

* The location shall NOT be in or close to corrosive gases.

* The location shall NOT be somewhere children can access.

Hole Diameter: 2.5~3 In

Align ruler 
with straight 
line

Hanger certer

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

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

Summary of Contents for WMMS-09C-V2A/B(58) 2

Page 1: ...red free from defects in material and workmanship for normal use and maintenance 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 YMGI Otherwise damage to equipment or property and even injury to people may occur Installer Currently licensed HVAC technician only Read m...

Page 2: ... differ from manufacturer to manufacturer and model to model Any ignoring or negligence may cause unit failure or damage which could be irrevocable and permanent 5 All of YMGI s products are fully tested and have passed rigorous safety and performance standards and others related to the industry before being packed and shipped YMGI only uses famous brands as suppliers for their parts that are also...

Page 3: ...es and wires are to be installed 11 If all the suggestions have been taken and all the necessary steps are followed CUSTOMER AND TECHNICIAN MUST READ The cost of not having your unit installed properly can be more expensive than spending the little extra money that hiring the right contractor will cost Protect your investment and warranty eligibility by doing it right the first time THE FOLLOWING ...

Page 4: ...trical 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 Unit D 13 What is the elevation ...

Page 5: ...erience or professional knowledge to correct the problem RECEIVING AND FREIGHT DAMAGE ATTENTION Freight package unit shall be checked thoroughly for damage at receiving before accepting by signing on the carrier s delivery paperwork Upon shipment being signed for acceptance it becomes a binding document as to the condition of the products on delivery We cannot process any shipping damage claim if ...

Page 6: ...y help you in the following steps in sequence from 1 to 3 CUSTOMER AND TECHNICIAN MUST READ If the damage is minor or partial that you choose to accept you can contact the distributor or YMGI to discuss the possible replacement of the damaged part If refusal of the shipment is needed due to severe freight damage DO NOT sign the carrier s delivery receipt document indicating that you accept the pro...

Page 7: ...send to you the Customer Request to Ship Products to YMGI Service Center for Inspection and Repair and Authorization to Charge form 2 You will review the form and fill all fields appropriately sign and send back to the YMGI Group 3 Once the form has been completed and sent back to YMGI remove the units and ship back to YMGI Please make a note describing the problem and communication history if pos...

Page 8: ...ns of general up flow condensing units are limited such as apartments condos lofts multi families and high rise buildings and others named or unnamed a Indoor unit s delivers the thermal and acoustical comfort to the rooms Air is drawn through the coil from the front or topside and then discharged from the bottom In cooling mode air passing through coil is cooled in heating mode air passing throug...

Page 9: ... copper tube Aluminum fin copper tube Axial flow Axial flow T1 T1 1 4 1 4 5 8 5 8 I IP24 560 170 Automatic Defrosting Automatic Defrosting WMMS 30C V2B 58 2 WMMS 36C V2B 58 2 MITSUBISHI MITSUBISHI 125 125 25 25 2860 2860 50 60 50 60 Cross flow fan 1 Aluminum fin copper tube 0 28 2 2 PCB 3 15A Transformer 0 2A PCB 3 15A Transformer 0 2A 52 50 48 40 52 50 48 40 62 60 58 50 62 60 58 50 Aluminum fin c...

Page 10: ...led on a wall or balcony close to the indoor unit the following are some benefits for contractors and customers Each system is thoroughly tested before leaving the factory Each unit is acoustically thermally and systematically designed to give optimum quality and reliability P17 OF 38 INDOOR UNIT MAJOR COMPONENTS Remode Control Display Auto Directional Louvers Up and Down Test Reset Switch Front P...

Page 11: ...12K 18K 24K Unit W 30 30 35 0 36 2 D1 12 6 21 3 11 3 12 6 21 3 11 3 15 6 22 0 24 0 11 5 15 7 16 8 D 10 1 10 1 13 4 14 6 P20 OF 38 USER NOTES AND SERVICE LOG 6 6 12 100 6 20 12 6 20 18 21 11 INSTALLATION CLEARANCE REQUIREMENTS GENERAL 155 163 161 170 31 3 31 3 30K 36K 38 5 38 5 16 8 16 8 YMGI Engineered Comfort Products for A Sustainable and Efficient Green World YMGI Engineered Comfort Products fo...

Page 12: ...g Tape Level Flash Light Screw Driver Phillps and Flat Hammer Knife Scissors Goggled Glass Mask Gloves Ladder 2 Refrigeration Related Work RECOMMENDED TOOLS FOR INSTALLATION 3 Electrical Related Installation Wire Cutter Wire Stripper Sharp Plier Cable Ties Black Tape for Electrical Use Meter Electrical Clamp Meter Not Shown Manifold Infra Thermometer Not Shown 4 Trial Running Units and Inspection ...

Page 13: ... are to be used make sure to keep the two holes close to each other at least 2 inches apart Mounting plate should be attached to the structural part of the wall Minimum clearance as shown below is required in order to ensure proper airflow and enough service room INSTALL WALL MOUNT PLATE Check unit to make sure the unit is good shape and ready to install in Check unit to make sure the installation...

Page 14: ... in condensing unit othewise condensate may ice up causing damage to the condensing unit Suggest to use YMGI provided brackets and condensate drainage fitting accessories Indoor unit front Bottom the rib of indoor unit the mounting plate Slice the insulation before bending Hold the 90 degree bend root bend one tube one time slowly no quicker than 10 seconds 90 degree bend If pipes need to come out...

Page 15: ... perpendicular to the pipe surface Don t cut too fast or too hard Turn and tighten the tube cutter slowly Remove residual left and de bur at the cutting edge The cutting edge should be clear and clean and smooth Running Interconnection Refrigerant Lines Use clean refrigeration grade of copper pipe only Keep the copper lines from kinking and transmitting noise to walls cabinets etc Pipe length not ...

Page 16: ...nation securely on the external wall with proper clamps at 6 feet apart Fill the gap between the wall hole and wall sleeve with putty to keep from rain or dust entering inside PIPING GUIDE Set the packed pipes vertically and then slowly unwind Don t unwind only one end of the coiled pipes Use pulley to keep the safe bending radius May also use rolling wheel to reduce internal pipe tension and avoi...

Page 17: ...efrigerant Charge Level Reference Temperature Pressure Table Split Condensing Unit R410A AC Product Series YMGI Group Mini Split Version 01 11 2010 Reference Temperature Pressure Table Split Condensing Unit R410A Heat Pump Product Series YMGI Group Mini Split System Version 01 11 2010 Outdoor Dry Bulb F Outdoor Dry Bulb C Outdoor Wet Bulb F Outdoor Wet Bulb C Indoor Dry Bulb Indoor Wet Bulb Discha...

Page 18: ...ng indoor fan motor works Heating all stop running 3s off blink four times 1 Forcibly lift up the panel at a specific angle from the two ends of the front panel following the arrow direction Then pull the air filter downwards to remove it Fig a 2 Mount the healthy filter onto the air filter Fig b If the air filter cannot be installed please mount the healthy filter on the front case Fig c 3 Mount ...

Page 19: ...ge is not staable cooling dehumidifying compressor will stop indoor fan motor works Heating all will stop 1 Check the Input voltage if the Voltage is lower than 150VAC restart the machine when the power supply is normal 2 Checking the reactor L connection off 3s blink 21 times PL Low DC Bus voltage protection Outdoor temp sensor hasn t connected well or damaged please refer to the sensor resistanc...

Page 20: ... 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...

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