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Installation instructions
Wiring
· Turn OFF the main power switch to the indoor unit and the outdoor unit and wait for a minimum of 3 minutes before
performing electrical wiring work or a periodical check.
· Make sure that the indoor and outdoor fans have stopped completely before performing electrical work or a periodical
check.
· Protect the wires, electrical parts, etc. from rats or other small animals. If not protected, fire could occur.
· Prevent the wiring from touching refrigerant pipes, plate edges, and electrical parts inside the unit.
· Install an ELB (Electric Leakage Break)in the power source.
If ELB is not used, it can cause electric shock or fire.
· This unit uses an inverter, which means that it must be used an earth leak detector capable handing harmonics in order
to prevent malfunctioning of the earth leak detector itself.
· The use of intermediate connection wires, stranded wires(see <Attentions when Connect the power supply wiring>),
extension cables or control line connection, is prohibited. The use of such connections may cause electric shock or fire.
· The tightening torque of each screw shall be as follows.
to 1
.0 lb ft (1.0 to 1.3 N·m)
f· .
M4:
0.7
f·ft.
M5: 1.5 to 1.8 lb
(2.0 to 2.5 N·m)
f·ft.
M6: 3.0 to 3.7 lb
(4.0 to 5.0 N·m)
f·ft.
M8: 6.6 to 8.1 lb
(9.0 to 11.0 N·m)
f·ft.
M10: 13.3 to 217 lb
Keep the above tightening torque when wiring work.
· Seal all wiring holes to protect from moisture, insects, etc.
· Tightly secure the power source wiring using the cord clamp inside the unit.
Note: Secure the rubber bushing with adhesive when conduit tubes to the outdoor unit are not used.
General check
(1) Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and
wire terminals) have been properly selected according to the electrical data and that they all comply with National
Electrical Code (NEC).
(2) Ensure that the voltage of power supply is within +10% of nominal voltage and earth/ground wire is connected at that power
supply. Failing to do so will damage electrical components.
(3) Ensure that the power supply is adequately sized.
Failure to properly size the power supply may cause compressor malfunction or failure.
(4) Ensure that the earth/ground wire is connected.
(5) Install a main switch. Multi-pole main switch with a space of 0.14 in. (3.5mm) or more, single phase main switch with a space
of 0.12 in. (3.0mm) or more between each phase.
(6) Ensure that the electrical resistance is more than 2 MΩ, by measuring the resistance between ground and the terminal of the
electrical parts. If not, do not operate the system until the electrical leakage is found and repaired.
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(18.0 to 23.0 N·m)
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WARNING
CAUTION
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