5 Drain Piping
CAUTION
• Do not create an upper-slope or rise for the drain piping, since drain water can ow back to the indoor unit causing leakage into the
room when the system operation is stopped.
• Do not connect the drain pipe with sanitary or sewage piping or any other drainage piping.
• When the common drain piping is connected with other indoor units, the connection position of each indoor unit must be higher
than the common drain pipe, meanwhile, the pipes must be large enough according to the unit size and number of nuts.
• After performing drain piping work and electrical wiring, check to ensure that water ows smoothly as in the following procedure.
• Checking the Float Switch:
a Switch ON the power supply.
b Pour 1.8 liters of water into the drain pan.
c Check to ensure that the water ows smoothly or whether no water leakage occurs. When water cannot be found at the end
of the drain piping, pour another 1.8 liters of water into the drain.
d Switch ON the power supply and press the RUN/STOP button.
• In case of pouring water through the access door.
Pump
Access Door
Insert the end of hose
between heat exchanger
and drain pan
Water (2000cc to 2500cc)
• In case of pouring water through the air outlet.
Water (2000cc to 2500cc)
Pump
Drain Pan
Insert the end of hose
between heat exchanger
and drain pan
INSTALLATION AND MAINTENANCE
HO2019289HA
19
EN
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