Installation Manual

INSTALLATION INSTUCTIONS INSTALLATION INSTUCTIONS
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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
ELECTRICAL CONNECTIONS
1) Remove the handle at the right side plate of the outdoor unit (one screw).
2) Remove the cable clamp, Connect the interconnecting power cable to the terminal block and secure the
connection. Be sure to match terminal to terminal matching the indoor unit wiring. The fitting line distributing
must be consistent with the indoor unit, terminal of line bank. Wiring should meet that of indoor unit.
3) Fix power connection wire by wire clamp.
4) Ensure wire has been fastened well.
5) Replace handle when done.
An all-pole disconnection switch having a
contact separation of at least 1/10" all poles
should be connected in with wires that are
secured to the unit meta structure.
Wrong wire connection may cause malfunction
of some electric components. After fixing cable,
ensure that leads between connection to fixed
point are well separated..
The connection pipes and the connectiong
wiring of the unit A and unit B must be
corresponding to each other respectively.
The system shall be installed in accordance
with NEC.
WMMS-21CH-V2B(59)(2) (1 to 2) / WMMS-30CH-V2B(59)(2) (1 to 2)
Handle
Indoor Unit B Indoor Unit A
3
2
N(1)
Interconnection
cable
3
2
N(1)
Interconnection
cable
L2
L1
Incoming Power
208~230/1/60
Power cord
N(1)
2
3
N(1)
2
3
B A
N(1)
2
3
N(1)
2
3
Outdoor unit
Indoor unit
B A
(Left) (Right)
HEIGHT LIMITS OF INDOOR AND OUTDOOR UNITS
Indoor unit
Outdoor unit
Lift
* Either the indoor unit or the outdoor unit can be higher, but the height difference must comply with 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 Oil-trap if elevation drop difference is more than 25", as illustrated below.
Indoor unit
Outdoor unit
Drop
Oil-Trap
≤18 ft
Refrigerant Pipe Min/Max. Length, Rise and Drop Height
1,000 Btu/h
09-12
18-24
30-36
Max. Length (Ft.)
50
75
100
Max. Rise Height (Ft.)
20
25
35
Max. Drop Height (Ft.)
28
35
50
Min. Length (Ft.)
15
15
15
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+5/8")
1/4+3/8")+2*(1/4+1/2")
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 in the manual that comes with the indoor
unit. Before attempting to wire the units review the
wiring diagrams to get familiar with procedure.
Always review all wiring before applying any power
to the unit. If there is any discrepancy between the
* 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.
INSTALLATION-OUTDOOR UNIT
printed manual and the unit wiring diagram always
use the information that is provided on the unit itself.