INST
ALLA
TION
INSTUCTIONS
INST
ALLA
TION
INSTUCTIONS
P18 OF 34
P17 OF 34
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
INSTALLATION POSITIONS FOR OUTDOOR UNIT
* 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).
The installation must be done by trained and
qualified service personnel with reliability
according to this manual.
Contact service center if you have any
questions, be for or during or after installation,
in order to avoid the malfunction or failure due
to unprofessional installation.
Picking up and moving the units, you must be
guided by trained and qualified personal, with
proper tool.
Ensure that the recommended clearance is left
around the unit, for proper installation,
operation and service in the future..
WMMS-42CH-V2B(59)(2) (1 to 4)
WMMS-21CH-V2B(59)(2) (1 to 2)
WMMS-30CH-V2B(59)(2) (1 to 2)
WMMS-48CH-V2B(59)(2) (1 to 4)
WMMS-24CH-V2B(59)(2) (1 to 3)
WMMS-36CH-V2B(59)(2) (1 to 3)
Inch
Model
B
E
Inch
13.5
21.7
13.5
22.75
13.5
22.75
13.5
22.5
INSTALLATION CLEARANCE
WMMS-60CH-V2B(59)(2) (1 to 5)
16.9
24.75
>18"
>18"
Other Brackets
Heavy-Duty PVC Riser
for Ground Mounting
Coated Brackets
W A ccessories
Bracket Accessories
INSTALLATION-OUTDOOR UNIT
INSTALL OUTDOOR UNIT
Strongly suggest to install the outdoor unit above the ground either on platform or brackets as shown below.
Heat pump unit must be lift up from ground level, since condensate must be drained out of the drain pan of the
condensing unit; othewise, condensate may be iced and built up to damage the condensing unit.
Suggest to use YMGI-provided brackets and condensate drainage fitting accessories.
(Actual unit/parts or installation may look differently from the illustrated)
PIPING AND WIRING 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 Breaker
21/30CH
2*(1/4+3/8")
15/75/25/35
N(1)/2/3/G
12AWG
30AMP
24/36CH
3*(1/4+3/8")
15/75/25/35
N(1)/2/3/G
10AWG
42CH
48CH
60CH
4*(1/4+3/8")
15/75/25/35
N(1)/2/3/G
10AWG
4*(1/4+3/8")
2*(1/4+3/8")+2*(1/4+1/2")
+(1/4+5/8")
15/75/25/35
15/75/25/35
N(1)/2/3/G
N(1)/2/3/G
8AWG
8AWG
30AMP
40AMP
40AMP
50AMP
Disconnect switch box for outdoor unit
Non-Metalic Power Whip
for Outdoor Use
(Field-Supplied, Not Spliced
and Not Knotted,
Water-Proof Sealed Tight,
UL Approved)
Bring in line-voltage power input
wires from circuit breaker to line-
voltage wire terminal block at outdoor
unit. Pass through certified wire pipes,
harnesses and knockouts. Enough
length shall be left for future service.
Only copper wire is allowed.
Strictly follow NEC or state or local
codes to select wires, circuit breaker,
conduits and to perform installation
work.
INSTALLATION & PICTURES-WALL MOUNT BRACKET FOR OUTDOOR UNIT(S)
(PART VARIES UPON MODELS/AVAILABILITY)
* Select a secured location where the outdoor unit will be installed properly.
* Orient the unit rear side (intake grill) towards wall and front side (discharge grill) away from wall.
* For ground installation, use factory-provided riser and accessories. Not to bolt unit feet directly onto ground.
Riser or brackets shall be levelled at outdoor unit foot surfaces. Secure unit foot by tightening bolts, nuts and
anti-vibration pads.
* For wall mount installation, use factory-provided brackets, anchors and accessories.
* Remove the wiring diagram cover where also the
handle for moving unit is located.
* Follow the wiring diagrams on the unit or the wiring
diagram manual that comes with the indoor unit to
get familiar with wiring and make sure nothing is
made wrong. If there is any discrepancy, always use
the one put in the units.
* Connect wires between indoor unit and outdoor
unit-power wire from outdoor to Indoor, control wires
from Indoor unit to outdoor unit. Pass wire through
certified wire pipes, harnesses and knockouts.
Enough length shall be left for future service. Only
copper wire is allowed.
CONNECT WIRING BETWEEN OUTDOOR UNIT AND INDOOR UNIT
OUTDOOR WIRING: OUTDOOR-INDOOR UNIT & DISCONNECT SWITCH
BOX/CIRCUIT BREAKER/FUSE
WIRING OUTDOOR UNIT
* Check the nameplate for rated electrical data. Connect unit to the correct electrical power source.
O
O
* Select power wire of proper type and size. Suggest to use UL approved 105 C/221 F multi-strand copper wire
for outdoor use. Refer to the following tables, for proper selection of wire gauge, size and circuit breaker.
WIRING OUTDOOR UNIT
INSTALLATION-OUTDOOR UNIT
