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Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install
the unit without a torque wrench, you may follow the installa-
tion method mentioned below.
After the work is finished, make sure to check that there
is no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque suddenly
increases. From that position, further tighten the flare nut the
angle shown below:
Table 3
Further tightening
Pipe size
angle
φ 6.4 (1/4")
60 to 90 degrees
φ 9.5 (3/8")
60 to 90 degrees
φ 12.7 (1/2")
30 to 60 degrees
φ 15.9 (5/8")
30 to 60 degrees
7.
DRAIN PIPING WORK
〈〈 〈〈 〈〈 〈〈Rig the drain pipe as shown below and take measures
against condensation. Improperly rigged piping could lead
to leaks and eventually wet furniture and belongings.〉〉 〉〉 〉〉 〉〉
(1) Carry out the drain piping
Connect the drain hose
(1) using the attached
hose and parts, as
shown in the right
drawing.
Piping process
inside unit
Tilt
• If converging multiple drain pipes, install according to the pro-
cedure shown below.
Slope downwards at a gradient
of at least 1/100
Select converging drain pipes whose gauge is suitable for the
operating capacity of the unit.
(2) After piping work is finished, check drainage flows
smoothly.
• Add approximately 1 liter of water slowly from the air out-
let and check drainage flow.
(3) Be sure to insulate all indoor pipes
6
Recommended arm length
of tool
Approx. 150mm
Approx. 200mm
Approx. 250mm
Approx. 300mm
Drip pan
Metal clamp
(accessory) (2)
Drain hose
(accessory) (1)
50 or more
3/4 B drain pipe
Cut to suitable length
(length : mm)
CAUTION
• Drain piping connections
Do not connect the drain piping directly to sewage pipes that
smell of ammonia. The ammonia in the sewage might enter
the indoor unit through the drain pipes and corrode the heat
exchanger.
• Keep in mind that it will become the cause of getting drain
pipe blocked if water collects on drain pipe.
8.
ELECTRIC WIRING WORK
8-1
GENERAL INSTRUCTIONS
• All field supplied parts and materials, electric works conform
to local codes.
• Use copper wire only.
• Follow the "WIRING DIAGRAM" attached to the unitbody to
wire the outdoor unit, indoor units and the remote controller.
For details on hooking up the remote controller, refer to the
"INSTALLATION MANUAL OF REMOTE CONTROLLER."
• All wiring must be performed by an authorized electrician.
• One BEV unit is connected to one indoor unit. Mark each
indoor unit and BEV unit as unit A, unit B..., and be sure the
terminal board wiring to the outdoor unit are properly
matched. If wiring and piping between the outdoor unit and
an indoor unit and BEV unit are mismatched, the system
may cause a malfunction.
• A circuit breaker capable of shutting down the power supply
to the entire system must be installed.
• Refer to the installation manual attached to the outdoor unit
for the size of power supply wiring connected to the outdoor
unit, the capacity of the circuit breaker and switch, and wiring
instructions.
• Be sure to ground the air conditioner.
• Do not connect the ground wire to gas and water pipes, light-
ning rods, or telephone ground wires.
• Gas pipes : might cause explosions or fire if gas leaks.
• Water pipes : no grounding effect if hard vinyl piping is used.
• Telephone ground wires or lightning rods : might cause
abnormally high electric potential in the ground during
lighting storms.
8-2
SPECIFICATIONS FOR FIELD WIRE
The remote controller wiring should be procured locally.
Refer to the Table 4 when preparing one.
Table 4
Wire
H05VV - U4G
Inter-unit wiring
(NOTE 1)
Vinyl cord with sheath
Remote
or cable
controller wiring
(2 wire) (NOTE 2)
NOTE
1. Shows only in case of protected pipes. Use H07RN-F in
case of no protection.
2. Insulated thickness : 1mm or more
3. Refer to the installation manual of the BEV unit.
2
Length
Size (mm
)
2.5
(NOTE 3)
Max.
0.75 - 1.25
500m
English
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