– 33 –
Gravitational drainage
Drain up
1
Reattach the drain cap.
* For gravitational drainage, remove the white connector
(CN504) on the upper left of the circuit board in the
electrical control box.
2
Insert flexible drain hose into lower drain pipe and
fix it with hose band.
3
Remove drain pump connector CN504.
When a down-gradient cannot be secured for the drain pipe, drain-up
piping is possible.
• The height of the drain pipe must be 850 mm or less from the underside
of the indoor unit.
• Take the drain pipe out of the drain pipe joint with the indoor unit in 300
mm or less, and bend up the pipe vertically.
• Immediately after the pipe is bent up vertically, lay the pipe making a
down-gradient.
Move the drain cap from
the lower pipe to the
upper pipe.
Lower pipe
Upper pipe
Red
CN504
Black
85
0 or
l
e
ss
Drain up setup dimensions
Flexible drain hose
(supplied)
618 or
less
For drain pipes that will be
connected after setup, make a
downward slope of 1/100 or more.
300 or less
Check the draining
In the test run, check that water drain is properly performed and water does not leak from the connecting part of
the pipes. When doing this, also check that no abnormal sounds are heard from the drain pump motor. Check
draining also when installed in heating period.
When the electrical and wiring work has been completed
Pour some water by following the method shown in the following figure. Then, while performing a cooling operation,
check that the water drains from the drain pipe connecting port (transparent) and that no water is leaking from the
drain pipe.
When the electrical and wiring work has not been completed
• Disconnect the float switch connector (3P: red) from the connector (CN34: red) on the printed circuit board inside
the electrical control box. (Before doing this, the power must be turned off.)
• Connect a 220 V to 240 V supply voltage to (L) and (N) on the power supply terminal block. (Do not apply a 220
V to 240 V voltage to (A), (B) of the terminal block. Otherwise, the printed circuit board may be damaged.)
• Pour the water by following the method shown in the following figure. (Amount of water poured: 1500 cc to 2000
cc)
• When the power is turned on, the drain pump automatically starts running. Check whether the water is draining
from the drain pipe connecting port, and check that no water is leaking from the drain pipe.
• After checking that the water drains and there are no water leaks, turn off the power, connect the float switch
connector to its original location (CN34) on the printed circuit board, and return the electrical control box to its
original position.
Supply water hose
220 V to 240 V
Pull out connector CN34
(Red) from P.C. board.
White
Red
Black
Black
65-EN
66-EN
+00EH99884801-2_01EN.book Page 33 Monday, January 28, 2013 7:54 PM
