YMGI WMMS-21CH Installer'S Instruction & User'S Manual Download Page 7

MUST READ

BRIEF UNIT INFORMA

TION

P11 OF 34

P12 OF 34

NAMES OF THE PARTS

TECHNICAL DATA

* Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric shock 
  might happen.

* Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash your air 
  conditioner in any case.

* Volatile liquids such as thinner or gasoline will cause damage to the appearance of air conditioner. (Only use 
  soft dry cloth moist cloth clean the air conditioner cabinet).

* This product must not be disposed together with the domestic waste.
  This product has to be disposed at an authorized place for recycling of electrical and electronic appliances.

* The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper 
  tube.

NO.

WMMS-21CH
WMMS-30CH

WMMS-24CH
WMMS-36CH

MOD

Electricity supply

HVAC type fuse or circuit breaker

Minimum power cord size

Refrigerant charge (R410A)

Size

Electricity data

1

Air Discharge grille

2

Wiring Panel/Handle

3

Valves

Front side panel/handle

Valves

Air Discharge grille

WMMS-42CH

WMMS-48CH

W1

D0

H

1

2

3

Air Discharge grille

Valves

Valves

Air Discharge grille

Front side panel/handle

Front side panel/handle

Before cleaning, it is necessary 
to stop unit operation and off the 
power supply.

WARNINGS FOR INSTALLATION, OPERATION, MAINTAINING AND SERVICE

Must connect the unit to dedicated
HVAC circuit breaker of proper 
size.

Shall not turn on and then off the
unit back and forth frequently.

Must not cut off or damage power 
cables and control wires.

In case of any damage found on
wires, must replace with good one
without any delay.

Don't entangle electrical wires or 
leave extra length of wire in the 
unit.

Never use indoor wires for outdoor 
use.

Not to connect unit to the wall 
switch. 

Disconnect the power supply, if 
not using the unit for quite a while. 

Never drag wires too hard, or use
wire to hang or band or fasten 
anything.

Must turn off unit and disconnect
electrical power, before cleaning
or servicing the unit.

Suggest to put a warning sign at
the switch, to avoid accidental
turning on the power by somebody
who doesn't know service is in
process.

Don't attempt to install or repair the 
unit by yourself. Saving on these 
work is not worthy, since you miss 
chance to have the professional 
look into the unit for a full diagnosis 
and complete repair. Also, 
factory warranty will be lost.

Handy man may 
successfully conduct some work. 
But, it is about responsibility and 
liability. Customer will have to take 
responsibility and liability for the
DIY installation or or repair.  

Don't step onto the top of unit.

Don't place anything atop of it.

The unit must be securely 
grounded.

The cable shall be connected to 
the grounding device in the 
home or building.

When smelling a burning or smoke,
turn off unit and disconnect the 
power and contact your installation
or service technician 
without delay.

If the abnormal or danger is not 
found and removed, keeping on 
operating the unit will damage the 
unit or even cause electric shock 
or fire.

Only apply correct electrical power
to the unit (208-230/1/60).

The compressor will vibrate if the
voltage is too low or too high. 
Electrical components may fail, if 
voltage is too high.

Mounting bracket must be sturdy
and secured.

Outdoor unit, 
especially the 
heatpump 
outdoor unit, must be installed at 
least 3-5 inches above the ground, 
to keep from possible ice being 
built up in cold weather. 

WMMS-60CH

Valves

Air Discharge grille

Front side panel/handle

1

2

3

1

2

3

1

2

3

1

2

3

W1

D0

H

30

10

56

33.3

15.0

23.5

30

30/40

10

8

88

35.25

35.25

15.75

27.6

27.6

WMMS-42CH

WMMS-21CH

WMMS-30CH

WMMS-48CH

WMMS-24CH

WMMS-36CH

40

8

37.4

15.75

27.5

15.75

208-230/1/60

AWG

OZ

Inch

Inch

Inch

AMP

88

88

WMMS-60CH

50

8

40.25

17.5

43.5

169

UNIT

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-21CH

Page 1: ...NY CHOIR OUTDOOR UNIT CH This product is designed and manufactured free from defects in material and workmanship for normal use and maintenance Installation operation maintenance and service shall fol...

Page 2: ...or your NEW home unit is not checked or used yet is closed whichever comes later by the owner s to Warranty Department YMGI Group POB 1559 O Fallon MO 63366 USA A full copy of Warranty Registration C...

Page 3: ...leakage before and after connecting them 28 Do you list the working details in the invoice and leave a copy to the customer 19 Did you charge the inter connection copper pipes and indoor unit with nit...

Page 4: ...operly 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 FOLLO...

Page 5: ...ity to claim freight damage is lost and YMGI will not replace the unit on this basis Contact the distributor or YMGI report the damage by forwarding the marked delivery receipt copy and pictures Only...

Page 6: ...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 co...

Page 7: ...rag wires too hard or use wire to hang or band or fasten anything Must turn off unit and disconnect electrical power before cleaning or servicing the unit Suggest to put a warning sign at the switch t...

Page 8: ...39K 7140 7820 9180 2200 1000 4650 12 12 18K 42K 7820 7820 8500 2200 1000 4650 9 9 9 9K 36K 6800 6800 6800 6800 2480 1000 4650 9 9 9 12K 39K 1750 1750 1750 2750 2480 1000 4650 9 9 12 12K 42K 1500 1500...

Page 9: ...a flat solid floor When mounting the unit on a wall or the roof make sure the support is firmly secured so that it cannot move in the event of intense vibrations or a strong wind Do not install the o...

Page 10: ...SIZES UNITS MADE AFTER 09 2012 Unit Connection Copper Pipe Sizes Min Max Length Elevation Wires from Outdoor to Each Indoor Unit Mini Wire Size from Outdoor to Circuit Breaker HVAC Type Circuit Break...

Page 11: ...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 Oil trap if elevation drop difference is more than 25 as illu...

Page 12: ...N 1 2 3 N 1 2 3 D C B A Left Right YMGI Engineered Comfort Products for A Sustainable and Efficient Green World YMGI Engineered Comfort Products for A Sustainable and Efficient Green World ELECTRICAL...

Page 13: ...IRING DIAGRAMS WARNING L BN WH BL YE AC L1 AC N1 AC N3 AC L3 27RD 36RD PR N 26BK 35BK W38 W37 X5 X3 X4 U V W P N W39 AP2 AP3 AP4 PR N AC L1 AC N1 XH 3 20BN 21BU X6 X1 X101 X12 X14 19YEGN E X10 AC L X9...

Page 14: ...h Capacity Size Inch 17 7 21 7 15 4 18 3 320 360 09K 18K 18K 60K Made of stainless steel Model BRKT 0918 ST1 BRKT 1860 ST1 A B LBs Btu h Capacity Size Inch 17 7 21 7 15 4 18 3 320 360 09K 18K 18K 60K...

Page 15: ...sure the unit is ready for trial running check wires and pipes and air intake and discharge and power and thermostat and others necessary components liquid connecting pipe liquid closing valve gas co...

Page 16: ...ranty registration card If not filed or not filled completely or correctly your factory warranty may not be qualified Possible Problems or Consequences PRESSURE TABLES Warning R410A refrigerant bears...

Page 17: ...ments for the refrigerant R410A Do not use any refrigerant other than R410A Do not clean the unit using mineral oil WARRANTY AND TECH SUPPORT YMGI warrants to the purchaser owner s that YMGI products...

Page 18: ...t history No Date Service Maintenance Conducted Person Phone USER NOTES Put down whatever questions you have or problems you have seen as a unit history No Date Questions or Problems Remarks USER NOTE...

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