Outdoor Unit; Installation Location; Precautions About Installation In Regions With Snowfall And Cold Temperatures; Refrigerant Piping Connection - Toshiba RAS-09 12EK Series Installation Manual

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.
Precautions about Installation in Regions
with Snowfall and Cold Temperatures
• 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.
Snow protection plate
Front
Snow protection hood
Snow accumulation line
Anchor
bolts
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 baffl e. To minimize the effect of strong winds,
specially in windy areas, install the unit as shown below.

Refrigerant Piping Connection

Flaring
1. Make sure you have enough pipe to reach to the indoor unit.
2. Cut the pipe with a pipe cutter.
90
3. Insert a fl are nut into the pipe and fl are the pipe.
1110251291-2 EN.indd 7 1110251291-2 EN.indd 7

OUTDOOR UNIT

OUTDOOR UNIT
Install the unit at least
19-11/16 in. (500 mm)
above the snow
accumulation line.
At least
19-11/16 in. (500 mm)
Holding frame
Strong
wind
Obliquity Roughness Warp

Tightening connection

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.
Half union
Externally
threaded side
Use a wrench to secure.
CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Outer dia. of copper pipe
Ø1/4 in. (Ø6.35 mm)
Ø3/8 in. (Ø9.52 mm)
• 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 specifi ed
tightening torque using a torque
wrench.

Wiring Connection

NOTE
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.
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.
FIELD CONNECTION WIRING
OUTDOOR UNIT
L1
L1
FIELD POWER SUPPLY
L2 L2
208/230/1/60
S
DISCONNECT PER
L1
NEC AND LOCAL CODE
L2
GND GND
7
Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Tightening torque
10 to 13 lbf.ft (14 to 18 N·m)
24 to 31 lbf.ft (33 to 42 N·m)
Flare at
indoor unit side
Flare at
outdoor unit side
DISCONNECT
PER NEC AND
LOCAL CODE INDOOR UNIT
S S
L1 L1
L2 L2
GND
LEGEND
Field high voltage and ground wiring
Factory wiring
Field signal wiring
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EN
SI