System Requirements; Wiring - Carrier DLFEHA Serie Instructions D'installation

DLFEHA: Installation Instructions

SYSTEM REQUIREMENTS

Allow sufficient space for airflow and servicing unit. See Fig. 7 — on page 8 for minimum required distances between unit and walls or ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated separately.
Table 3 lists the pipe sizes for the indoor unit. Refer to the outdoor unit installation instructions for other allowed piping lengths and
refrigerant information.
UNIT SIZE
in
Gas Pipe
(mm)
in
Liquid Pipe
(mm)

WIRING

All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. Use the 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 caution note, only stranded copper conductors with a 600 volt rating
and double insulated copper wire must be used. The use of BX cable is
not recommended.
Recommended Connection Method for Power and Communication
Wiring − Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/3
power/communication wiring from the outdoor unit to the indoor unit
consists of four (4) wires and provides the power for the indoor unit. Two
wires are high voltage AC power, one is communication wiring and the
other is a ground wire.
Recommended Connection Method for Power and Communication
Wiring (To minimize communication wiring interference) Power
Wiring:
The main power is supplied to the outdoor unit. The field supplied power
wiring from the outdoor unit to the indoor unit consists of three (3) wires
and provides the power for the indoor unit. Two wires are high voltage
AC power and one is a ground wire.
To minimize voltage drop, the factory recommended wire size is 14/2
stranded with a ground.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 3 — Indoor Unit Pipe Sizes
12K (115V) 9K (208/230V)
1/2 3/8
12.7 9.52
1/4 1/4
6.35 6.35
4
12K (208/230V)
1/2
12.7
1/4
6.35
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600 volt
rating and double insulated copper wire, must be used as the
communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
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 rating and double
insulated copper wire.
18K (208/230V) 24K (208/230V)
1/2 5/8
12.7 16
1/4 3/8
6.35 9.52