10
Drain up
When a downward grading cannot be secured on the
drain pipe, a drain-up work is possible.
• Set the height of the drain pipe within 550mm from
the bottom surface of the ceiling.
• Draw out the drain pipe within 100mm from the end
of the drain pipe connecting port of the indoor unit,
and then raise it vertically.
• After the drain pipe has been raised, set a grading so
that it is immediately bent downward.
When the electric work has not finished:
• Pull out the float switch connector (3P: Red) from P.C.
board connector (CN34: Red) of the electric parts box.
(In this time, be sure to check the power is turned off.)
• Connect the single-phase 220-240V 50Hz
(or 220V 60Hz) power to the terminal blocks R (L) and
S (N). (Never apply 220-240V to (A), (B), (U1),and
(U2), otherwise a trouble of P.C. board occurs.)
• Pour water referring to the right figure.
(Amount: 1500cc to 2000cc)
• When the power is turned on, the drain pump motor
drives automatically.
Check water is drained from the drain pipe connecting
port (Transparent), and then check there is no water
leak from the drain pipes.
• After check of draining and water leak, turn off the
power supply, attach the float switch connector to the
original position (CN34) of P.C. board, and then set
the electric parts box as before.
Thermal insulating process
• After check of draining, apply thermal insulation surely
to the pipe connecting part.
• Give taping without clearance to the striking section of
the main unit with thermal insulator at local site.
Rising up 550mm or less
100mm
or less
Indoor unit
220–240V
~
, 50Hz
220V
~
, 60Hz
White
Black
CN34
(RED)
Black
Red
Pull out connector CN34 (Red) from P.C. board.
R(L)
S(N)
Insert the end of hose
up to the near of suction
port of drain pump.
Service plate
Butt heat insulator without clearance.
Heat insulator
(Required at site)
Using tape,
fix the heat insulator.
Heat insulator
(Main unit side)
Hard vinyl
chloride pipe
(Required at site)
Check the draining
After drain piping work, check that water drain is properly performed and water does not leak from the connecting
part of the pipes. In this time, check also there is no abnormal sound of the motor of the drain pump.
Be sure to check draining when installed in the heating period.
When the electric work has finished:
• Before installing a panel, pour water as shown in the following figure, check water is drained from the drain pipe
connecting port (Transparent) in COOL mode, and then check there is no water leak from the drain pipes.
4
DRAIN PIPING WORK
