English 13
• When directly connecting a hard vinyl chloride pipe joint (nominal diameter 13mm) to the drain hose
connected to the indoor unit (i.e. for embedded piping, etc.), use a commercially available hard vinyl
chloride pipe joint (nominal diameter 13mm). (Refer to Fig. 18)
(2) Make sure the drain works properly.
• After drain work is complete, perform a drain
check by opening the front panel, removing
the air filter, pouring water into the drain
pan, and making sure water flows smoothly
out of the drain hose. (Refer to Fig. 19)
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.
7. ELECTRIC WIRING WORK
7-1 GENERAL INSTRUCTIONS
• All field supplied parts and materials and electric works must conform to local codes.
• Use copper wire only.
• For electric wiring work, refer to also “WIRING DIAGRAM” attached to the unit body.
• For remote controller wiring details, refer to the installation manual attached to the remote controller.
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each indoor unit as unit A, unit B..., and be sure the
terminal board wiring to the outdoor unit and BS unit are properly matched. If wiring and piping between the
outdoor unit and an indoor unit are mismatched, the system may cause a malfunction.
• A circuit breaker capable of shutting down 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 earth the air conditioner.
• Do not connect the earth wire to gas pipes, water pipes, lightning rods, or telephone earth wires.
• Gas pipes: might cause explosions or fire if gas leaks.
• Water pipes: no earthing effect if hard vinyl piping is used.
• Telephone earth wires or lightning rods: might cause abnormally high electric potential in the earth dur-
ing lighting storms.
Drain hose connected
to the indoor unit
Commercially available
hard vinyl chloride pipe
joint (nominal diameter 13mm)
Commercially available
hard vinyl chloride pipe
(nominal diameter 13mm)
Fig. 18
Plastic container
for pouring
Drain pan
Make sure not to splash the water.
Fig. 19
01_EN_3P366851-14C.fm Page 13 Wednesday, October 14, 2015 3:02 PM
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