4
32801000401
Specifications subject to change without notice.
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and servicing unit (see Fig. NO TAG).
Piping
IMPORTANT:
Both refrigerant lines must be insulated separately.
S
Minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
S
Table 1 lists the pipe sizes for the indoor unit. Refer to the outdoor unit installation instructions for other allowed piping lengths and refrigerant
information.
Table 1—Indoor Unit Pipe Sizes
System Size
12K
(208/230V)
18K
(208/230V)
24K
(208/230V)
36K
(208/230V)
48
(208/230V)
58
(208/230V)
Suction Pipe (size - connection type)
In
(mm)
1/2 (12.7)
1/2 (12.7)
5/8 (15.9)
5/8 (15.9)
5/8 (15.9)
5/8 (15.9)
Liquid Pipe (size - connection type)
In
(mm)
1/4 (6.35)
1/4 (6.35)
3/8 (9.52)
3/8 (9.52)
3/8 (9.52)
3/8 (9.52)
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.
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 and (S) between outdoor unit and indoor unit landing the
shield onto ground in the outdoor unit only.
!
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.
CAUTION
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.
CAUTION