2.3. Pipe requirement
2.3.1. Protection of pipes
• Protect the pipes to prevent the entry of moisture and dust.
• Especially, pay attention when passing the pipes through a hole or connecting the end
of a pipe to the outdoor unit.
Location
Working period
Protection method
1 month or more
Pinch pipes
Outdoor
Less than 1 month
Pinch or tape pipes
Indoor
-
Pinch or tape pipes
2.3.2. Refrigerant pipe size and allowable piping length
CAUTION
• Keep the piping length between the indoor unit and outdoor unit within the allowable
tolerance.
• The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
LZ series
(includes cold region model)
Model
LM series
9, 12 models
15 model
1/4 (6.35) /
Pipe diameter <Liquid/Gas> [in (mm)]
1/4 (6.35) / 3/8 (9.52)
1/2 (12.70)
Max. piping length (L)
[ft (m)]
65 (20)
Max. height difference (H)
49 (15)
<Indoor unit to outdoor unit>
[ft (m)]
L
View (Example)
H
2.4. Power source
WARNING
• Always use a special branch circuit and install a special receptacle to supply power
to the room air conditioner.
• Use a circuit breaker and receptacle matched to the capacity of the air conditioner.
• Install a leakage circuit breaker in accordance with the related laws and regulations
and electric company standards.
• The circuit breaker is installed in the permanent wiring. Always use a circuit that can
trip all the poles of the wiring and has an isolation distance of at least 3 mm between
the contacts of each pole.
CAUTION
• The power source capacity must be the sum of the air conditioner current and
the current of other electrical appliances. When the current contracted capacity is
insuffi cient, change the contracted capacity.
• When the voltage is low and the air conditioner is diffi cult to start, contact the power
company the voltage raised.
2.5. Electric requirement
CAUTION
• Be sure to install a breaker of the specifi ed capacity.
• Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Voltage rating
1 ø 208/230 V (60 Hz)
Operating range
187-253 V
Cable
Type
Remarks
2 cable + Earth (Ground), 1
Power supply cable
14AWG
ø 208/230 V
3 cable + Earth (Ground), 1
Connection cable
14AWG
ø 208/230 V
Select the correct cable type and size according to the country or region’s regulations.
Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire
diameter when the wire length is long.