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1. Safety precautions
1.3. Before electric work
A\ Caution:
¢ Be sure to install circuit breakers. If not installed, electric shock may result.
IMPORTANT
Make sure that the current leakage breaker is one compatibie with higher
rue
oe
Always
use a current leakage breaker that is compatible with higher har-
monics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of in-
am
¢ For the power lines, use standard cables of sufficient capacity. Otherwise, a
short circuit, overheating, or fire may result.
« When
installing the power
lines, do not apply tension to the cables.
If the
connections are loosened, the cables can snap or break and overheating or
fire may result.
¢ Be sure to ground the unit. Do not connect the ground wire to gas or water
pipes, lighting rods, or telephone grounding
lines. If the unit is not properly
grounded, electric shock may result.
¢ Use
circuit breakers
(ground
fault interrupter,
isolating
switch
(+B fuse),
and
molded
case
circuit breaker) with the specified
capacity.
If the circuit
breaker capacity
is larger than the specified
capacity,
breakdown
or fire
may result.
1.4. Before starting the test run
Z\ Caution:
« Turn
on the main
power switch
more than
12 hours
before
starting opera-
tion.
Starting operation just after turning on the power switch can severely dam-
age the internal
parts. Keep
the main
power switch
turned
on during
the
operation season.
¢ Before starting operation, check that all panels, guards and other protective
parts are correctly installed. Rotating,
hot, or high voitage
parts can cause
injuries.
« Do not touch any switch with wet hands. Electric shock may result.
¢ Do
not touch
the refrigerant pipes with
bare hands
during
operation.
The
refrigerant pipes are hot or cold depending
on the condition of the flowing
refrigerant. If you touch the pipes, burns or frostbite may result.
« After stopping
operation,
be sure to wait at least five minutes
before turn-
ing off the main power switch. Otherwise, water leakage or breakdown
may
result.
1.5. Using R410A refrigerant air conditioners
A\ Caution
«Use
C1220
copper
phosphorus,
for copper
and
copper
alloy
seamless
pipes, to connect the refrigerant pipes. Make
sure the insides of the pipes
are clean
and
do not contain
any
harmful
contaminants
such
as sulfuric
compounds,
oxidants,
debris,
or dust. Use
pipes with the specified thick-
ness. (Refer to page 6) Note the following
if reusing existing pipes that car-
ried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
Do not use thin pipes. (Refer to page 6)
Store the pipes to be used
during
installation indoors and
keep
both ends
of the
pipes
sealed
until just before
brazing.
(Leave
elbow joints, etc. in
their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil
deterioration or compressor breakdown
may result.
Use ester oil, ether oil, alkylbenzene
oil (small amount)
as the refrigeration
oil applied to the flared sections.
If mineral oil is mixed
in the refrigeration
oil, oil deterioration may resuit.
2. Installation diagram & parts
« Do not use refrigerant other than R410A refrigerant. If another refrigerant is
used, the chlorine will cause the oil to deteriorate.
« Use the following tools specifically designed for use with R410A refrigerant.
The following
tools are necessary
to use
R410A
refrigerant.
Contact your
nearest dealer for any questions.
Tools
R410A
Flare tool
manifold
hose
Size
Gas leak detector
Vacuum
T
wrench
Electronic
t
scale
« Be sure to use the correct tools. If dust, debris, or moisture
enters the re-
frigerant lines, refrigeration oil deterioration may result.
« Do not use a charging cylinder. If a charging cylinder is used, the composi-
tion of the refrigerant will change and the efficiency will be lowered.
Branch box
5-branches type
Outdoor unit
2.1. Before installation (Fig. 2-1)
This installation manual
is only for the outdoor unit installation. In install-
ing the indoor units and
branch
box, refer to the installation
manual
at-
tached to each unit.
Any structural alterations necessary for the installation must comply with the local
building code requirements.
This diagram is intended to show the configuration of accessories.
For actual installation, the outdoor unit is to be turned 180°.
Units should be installed by licensed contractor according to local code require-
ment.
Note:
The dimensions
given along the arrows
above
are required to guarantee the
air conditioner's
performance.
Install the unit in as wide a piace as possible
for later service or repairs.
Parts to be focally procured
®
Branch box/outdoor unit connecting wire
1
(3-core, Refer to 7.3. External wiring procedure)
®| Extension pipe
1
@| Wall hole sleeve
1
@®| Wall hole cover
1
Pipe fixing band
®
(The quantity depends on the pipe length.)
2to7
e
Fixing screw for @ 4 x 20 mm
(13/16")
207
(The quantity depends on the pipe length.)
©}
Piping tape
1
@| Putty
1
@)|
Drain hose (hard PVC pipe O.D. 20 mm
(13/16"))
1
@| Refrigeration oil
1
@
Power supply cord
1
(2-core, Refer to 7.3. External wiring procedure)
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