9
Wiring Connections
WARNING
!
Isolate the power supply before accessing unit
electrical terminals.
Install unit so that unit disconnect is accessible.
Follow all local and national codes, as well as this
installation instruction, during installation. Do NOT
overload electrical circuit, as this may lead to failure
and possible fi re.
Use specifi ed wiring and cable to make electrical
connections. Clamp cables securely and make sure
that connections are tight to avoid strain on wiring.
Insecure wiring connections may result in equipment
failure and risk of fi re.
Wiring must be installed so that all cover plates can
be securely closed.
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).
Refer to unit nameplate for minimum circuit ampacity and
maximum overcurrent protection size.
NOTE - Three-conductor shielded cable must be used for
the communication wiring. This is necessary to
ensure
proper system communication and operation.
CAUTION
!
This unit must be properly grounded and protected
by a circuit breaker. The ground wire for the unit must
not be connected to a gas or water pipe, a lightning
conductor or a telephone ground wire.
Do not connect power wires to the outdoor unit until
all other wiring and piping connections have been
completed.
Install all wiring at least 3 feet away from televisions,
radios or other electronic devices in order to avoid
the possibility of interference with the unit operation.
Do not install the unit near a lighting appliance that
includes a ballast. The ballast may affect remote
control operation.
1. Lift indoor unit front panel to access the control box
over. Remove the screw(s) securing the cover. Remove
the plate.
2. Locate the terminal strip in the control box. Connect the
power wiring (sized per NEC/CEC and local codes) and
communications cable
(three-conductor, shielded
cable).
Refer to unit nameplate for rated voltage.
3. If the indoor unit is the fi nal unit in a group that is wired
in series, install the provided resistor across terminals
P and Q.
4. Remove spacer. Secure bottom of unit to wall mounting
bracket. Continue with installation of outdoor unit and
system commissioning.
CONTROL BOX
COVER
POWER WIRING
COMMUNICATIONS
WIRING
Figure 11. Accessing Control Box
Network Address and Commissioning
After the system has been installed, each indoor unit must
be assigned an address as part of the commissioning
procedure.
