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PMGB0406B rev.1
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The electrical wiring capacity of the outdoor unit should be referred according to the "Installation and
Maintenance Manual" for the outdoor unit. Adjusting the DIP switches may be required depending on the
arrangement with the outdoor unit.
Select wiring capacity; then, install a GFCI (Ground Fault Circuit Interrupter) and main switch as shown in
each of the system diagrams as shown below.
21.2.2 Details of Electrical Wiring Connection
21.2.1 Field Minimum Wire Sizes for Power Supply
x
This equipment can be installed with a Ground Fault Circuit Interrupter (GFCI), which is a recognized
measure for added protection to a properly grounded unit. Install appropriate sized breakers /
fuses / overcurrent protection switches and wiring in accordance to local, state and NEC codes and
requirements. The equipment installer is responsible for understanding and abiding by applicable codes
and requirements. Failure to use a GFCI can result in electrical shock or
¿
re.
x
Do not operate the system until all the check points have been cleared.
(A) Verify that electrical resistance is more than one megaohm by measuring the resistance between
ground and the terminals of the various electrical components. If less than one megaohm, do not
activate the system until the electrical current drain is found and repaired.
(B) Check to ensure that the stop valves for the outdoor unit are fully opened, and then start the system.
(C) Check to see that the main power has been switched ON for longer than 12 hours prior activating
the system. Power to the crankcase heater needs this time interval to warm the compressor oil up to
operating temperature.
x
Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the
pipes at the discharge side are heated higher than 194
o
F (90
o
C).
21.2 Electrical Wiring Capacity
(1) Make sure that the
¿
eld-selected electrical components: (main power switches, circuit breakers, wires,
conduit connectors, and wire terminals) have been properly labeled in accordance with electrical data
as speci
¿
ed in the Engineering Manual. Make sure that the components comply with the National
Electrical Code (NEC).
(2) Check to ensure that the power supply voltage is within ±10% of the rated voltage.
(3) Check the capacity of the electrical wires.
If the power supply capacity is too low, the system cannot be started due to a voltage drop.
(4) Verify that the ground wiring is securely connected.
Ɣ
Secure all cables together with cable clamps and seal the connecting hole against the onslaught of
moisture and insects.
Ɣ
Run the electrical wiring through the connecting hole in the side cover when using conduit.
21.1 General
Check
(Ins)DX-Kit̲4e-rev1.indd 50
(Ins)DX-Kit̲4e-rev1.indd 50
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2016/11/25 15:32:56