4
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and service of the unit. See Fig. 5 for the required minimum distances between the unit, walls or ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated separately.
S
Table 3 contains piping information for the product covered within this document.
Table 3—Piping and Refrigerant Information
System Size
9K (115V)
12V (115V)
9K (208-230V)
12K (208-230V)
18 (208-230V)
24K (208-230V)
Piping
Min. Piping Length
ft. (m)
10(3)
10(3)
10(3)
10(3)
10(3)
10(3)
Standard Piping Length
ft. (m)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
Max. outdoor-indoor
height difference
(OU higher than IU)
ft. (m)
32(10)
32(10)
32(10)
32(10)
65(20)
65(20)
Max. outdoor-indoor
height difference
(IU higher than OU)
ft. (m)
32(10)
32(10)
32(10)
32(10)
65(20)
65(20)
Max. Piping Length with
no additional refrigerant
charge per System
(Standard Piping length)
ft. (m)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
25(7.5)
Total Max. Piping
Length per system
ft. (m)
82(25)
82(25)
82(25)
82(25)
98(30)
164(50)
Additional refrigerant
charge (between Standard
– Max piping length)
Oz/ft
(g/m)
0.161(15)
0.161(15)
0.161(15)
0.161(15)
0.161(15)
0.322(30)
Suction Pipe
(size - connection type)
In (mm)
3/8(9.52)
1/2(12.7)
3/8(9.52)
1/2(12.7)
1/2(12.7)
5/8(15.9)
Liquid Pipe
(size - connection type)
In (mm)
1/4(6.35)
1/4(6.35)
1/4(6.35)
1/4(6.35)
1/4(6.35)
3/8(
9.52
)
Refrigerant Type
Type
R410A
R410A
R410A
R410A
R410A
R410A
Refrigerant
Cooling Only Models
Charge Amount
Lbs (kg)
1.06(0.48)
1.30(0.59)
1.06(0.48)
1.30(0.59)
2.09(0.95)
2.65(1.2)
Heat Pump Models
Charge Amount
Lbs (kg)
1.76(0.8)
2.12(0.96)
1.76(0.8)
2.12(0.96)
3.30(1.5)
3.968(1.8)
All outdoor units have an electronic expansion valve to manage the refrigerant flow of the fan coil connected.
WIRING
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use Electrical
Data table MCA (minimum circuit amps) and MOCP (maximum
over current protection) to correctly size the wires and the
disconnect fuse or breakers respectively.
Per the caution note, only stranded copper conductors with a 600
volt insulation rating wire must be used.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
14/3 stranded wire with ground with a 600 volt insulation rating,
power/communication wiring from the outdoor unit to indoor unit
consists of four (4) wires and provides the power for the indoor
unit. Two wires are line voltage AC power, one is communication
wiring (S) and the other is a ground wire. Wiring between indoor
and outdoor unit is polarity sensitive. The use of BX wire is NOT
recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be
used to replace L2/N and (S) between outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Wires should be sized based on NEC and local codes.
Use copper conductors only with a 600 volt insulation
rating wire.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may cause
the terminal to overheat or result in unit malfunction. A fire
hazard may also exist. Ensure all wiring is tightly connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.