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Installation conditions
Before installation
Be sure to prepare to the following items before
installation.
Length of refrigerant pipe
Model
Length of
refrigerant pipe
connected to
indoor / outdoor
unit
Item
SP302
SP362
SP422
SP482
16’5” to 164’1”
(5 to 50 m)
Addition of refrigerant
at the local site is
unnecessary for
refrigerant pipe length
up to 98’5” (30 m).
If the refrigerant pipe
length exceeds
98’5” (30 m).
Add refrigerant in
the amount given in
“Charging additional
refrigerant”
* Caution during addition of refrigerant.
When the total length of refrigerant piping exceeds
98’5”(30 m.)
, add 40 g/m of refrigerant up to a
maximum total length of piping at
164’1”(50 m.)
.
(Max. amount of additional refrigerant is 800 g.)
Charge the refrigerant accurately. Overcharging may
cause serious trouble with the compressor.
• Do not connect a refrigerant pipe that is shorter than
16’5” (5 m)
.
This may cause a malfunction of the compressor or
other devices.
Leakage test
1. Before starting an leakage test, further tighten the
spindle valves on the gas and liquid sides.
2. Pressurize the pipe with nitrogen gas charged from
the service port to the design pressure (4.15 MPa)
to conduct an leakage test.
3. After the leakage test is completed, evacuate the
nitrogen gas.
Evacuation
• To evacuate system, use a vacuum pump.
• Do not use refrigerant charged in the outdoor unit
for evacuation.
Electrical wiring
• Be sure to fix the power wires and system
interconnection wires with clamps so that they do
not come into contact with the cabinet, etc.
Grounding
WARNING
Make sure that proper grounding is provided.
Improper grounding may cause an electric shock.
For details on how to check grounding, contact the
dealer who installed the air conditioner or a
professional installation company.
• Proper grounding can prevent charging of electricity
on the outdoor unit surface due to the presence of a
high frequency in the frequency converter (inverter)
of the outdoor unit, as well as prevent electric shock.
If the outdoor unit is not properly earthed, you may
be exposed to an electric shock.
•
Be sure to connect the earth wire. (grounding
work)
Incomplete grounding can cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
Test run
Turn on the leakage breaker at least 12 hours before
starting a test run to protect the compressor during
startup.
CAUTION
Incorrect installation work may result in a malfunction
or complaints from customers.
Installation Location
WARNING
Install the outdoor unit in a location that can
support the weight of the outdoor unit.
Insufficient durability may cause the outdoor unit to
fall, which may result in injury.
CAUTION
Do not install the outdoor unit in a location that
is subject to combustible gas leaks.
Accumulation of combustible gas around the outdoor
unit may cause a fire.
Install the outdoor unit in a location that meets
the following conditions.
• A well-ventilated location free from obstacles near
the air inlets and air outlet
• A location that does not increase the operating
noise or vibration of the outdoor unit
• A location that does not produce any drainage
problems from discharged water
• Location with easy access to power.
Do not install the outdoor unit in the following
location.
• A location with a saline atmosphere (coastal area)
or one that is full of sulfide gas (hot-spring area)
(Special maintenance is required.)
• A location subject to oil, vapor, oily smoke, or
corrosive gases
• A location in which organic solvent is used
• A location where high-frequency equipment
(including inverter equipment, private power
generator, medical equipment, and communication
equipment) is used (Installation in such a location
may cause malfunction of the air conditioner,
abnormal control or problems due to noise from
such equipment.)
• A location in which the discharged air of the
outdoor unit blows against the window of a
neighboring house
• A location where the operating noise of the
outdoor unit is transmitted
• When the outdoor unit is installed in an elevated
position, be sure to secure its feet.
• A location in which drain water poses any problems.
When an outdoor unit is installed in a location that
is always exposed to strong winds like a coast or
on the high stories of a building, one of the following
is recommended.
• Install the unit so that its discharge faces the wall of
the structure.
Keep a distance 19.7” (500 mm) or more between
the unit and wall.
19.7” (500 mm)
• Install the unit so that the discharge is at a right
angle relative to the wind direction.
Strong wind
Strong wind
• Use wind baffle. Produce those parts in the field.
• When outside temperature conditions are 23 °F
(-5°C) or lower and unit is running in cooling mode.
<Example>
Wind baffle
Wind baffle
Wind baffle
13-EN
14-EN
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