EN
SI
7
OUTDOOR UNIT
OUTDOOR UNIT
Installation Location
• A location which provides enough spaces around the outdoor unit as
shown in the diagram above.
• A location which can bear the weight of the outdoor unit and does not
allow an increase in noise level and vibration.
• A location where the operation noise and discharged air do not disturb
your neighbors.
• A location which does not expose the unit to strong winds.
• A location free of combustible gases leaks.
• A location which does not block a passage.
• A location where drain water does not cause any problems.
• Depending on snow level, use a
fi
eld fabricated ice or snow stand.
• When the outdoor unit is to be installed in an elevated position, be sure to
secure it as described in the section above.
CAUTION
1. Install the outdoor unit in a location where there are no obstructions
near its air intake or air outlet.
2. When the outdoor units is installed in a place that is always exposed
to strong winds like on the coast or on a high story of a building, use
a
fi
eld fabricated wind baf
fl
e. To minimize the effect of strong winds,
specially in windy areas, install the unit as shown below.
Strong
wind
90
Refrigerant Piping Connection
1. Make sure you have enough pipe to reach to the indoor unit.
2. Cut the pipe with a pipe cutter.
Flaring
Obliquity
Roughness
Warp
3. Insert a
fl
are nut into the pipe and
fl
are the pipe.
Wiring Connection
1. MOUNT THE OUTDOOR UNIT POWER DISCONNECT.
2. RUN POWER WIRING FROM MAIN BOX TO DISCONNECT PER NEC
AND LOCAL CODES.
3. Remove the valve cover and the cord clamp from the outdoor unit.
4. Fix conduit connector to conduit plate by lock nut and secure it tightly.
Connect the power supply and connecting cables to the terminal block as
shown in the
fi
gure in the next page and secure it tightly with screws.
5. You should not have extra cables.
6. Secure the power cord and the connecting cable with the cord clamp.
7. Attach the electric parts cover and the valve cover to the outdoor unit.
8. RUN PIPING AND INTERCONNECTING CABLE TO THE INDOOR
UNIT.
All wiring and connections must comply with NEC, CEC, and local codes.
• Connect all wires to the correct terminal on the wiring terminal blocks.
• Make sure that all connectors are secure.
• Size connectors per the ratings listed in the system requirement section.
• System interconnections should be minimum AWG14.
NOTE
CAUTION
Align the centers of the connecting pipes and tighten the
fl
are nut as far as
possible with your
fi
ngers. Then tighten the nut with a two wrenches as show
below.
Tightening connection
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Outer dia. of copper pipe
Tightening torque
Ø1/4 in. (Ø6.35 mm)
10 to 13 lbf.ft (14 to 18 N·m)
Ø3/8 in. (Ø9.52 mm)
24 to 31 lbf.ft (33 to 42 N·m)
•
Tightening torque for connection of
fl
are pipe
The pressure of R410A is higher than
R22. (Approx. 1.6 times.) Therefore
securely tighten the
fl
are pipes
which connect the outdoor unit and
the indoor unit with the speci
fi
ed
tightening torque using a torque
wrench.
Half union
Flare nut
Externally
threaded side
Internally
threaded side
Flare at
indoor unit side
Flare at
outdoor unit side
Use a wrench to secure.
Use a torque wrench to tighten.
• Do not use the supplied drain nipple for draining water. Drain the water
from all drain holes directly.
• To protect the outdoor unit from snow accumulation, install a holding
frame, and attach a snow protection hood and plate.
* Do not use a double-stacked design.
Precautions about Installation in Regions
with Snowfall and Cold Temperatures
Snow protection plate
Snow protection hood
Snow accumulation line
Holding frame
At least
19-11/16 in. (500 mm)
Install the unit at least
19-11/16 in. (500 mm)
above the snow
accumulation line.
Anchor
bolts
Front
L2
L1
L2
L1
S
S
S
L1
L1
L1
L2
L2
L2
GND
GND
GND
FIELD POWER SUPPLY
208/230/1/60
DISCONNECT PER
NEC AND LOCAL CODE
INDOOR UNIT
OUTDOOR UNIT
LEGEND
DISCONNECT
PER NEC AND
LOCAL CODE
Field high voltage and ground wiring
Factory wiring
Field signal wiring
FIELD CONNECTION WIRING
1110251291-2 EN.indd 7
1110251291-2 EN.indd 7
12/13/13 5:00 PM
12/13/13 5:00 PM
Summary of Contents for RAS-09 12EA Series
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