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5 Drain piping work
1. Ensure that the drain piping is downward (pitch of more than
1/100) to the outdoor (discharge) side. Do not provide any trap
or irregularity on the way. (Fig. 5-1)
2. Ensure that any cross-wise drain piping is less than 20 m
(excluding the difference of elevation). If the drain piping is long,
provide metal braces to prevent it from waving. Never provide
any air vent pipe. Otherwise drain may be ejected.
3. Use a hard vinyl chloride pipe VP-25 (with an external diameter
of 32 mm) for drain piping.
4. Ensure that collected pipes are 10 cm lower than the unit
body's drain port.(Fig. 5-2)
5. Do not provide any odor trap at the drain discharge port.
6. Put the end of the drain piping in a position where no odor is
generated.
7. Do not put the end of the drain piping in any drain where ionic
gases are generated.
8. The intake of the drain piping can be made 41 cm higher than
the drain discharge port. If there are some obstacles under the
ceiling, use elbows to make it at least height according to the
site. (Fig. 5-3)
Note:
If the rise portion is long, there will be a lot of returned water
in an operation stop, generating slime or odor during off-sea-
son. Ensure that the rise portion is at a minimum.
Caution:
Pipe the drain piping to ensure that it discharges drain, and
insulate it to prevent dew condensation. A failure to the pip-
ing work may cause water leakage and so wet your property.
6 Confirming drain discharge
Make sure that the drain-up mechanism operates normally for discharge
and that there is no water leakage from the connections.
•Be sure to confirm the above in a period of heating operation.
•Be sure to confirm the above before ceiling work is done in the case of a new
construction.
1. Insert the enclosed connector
control box.
2. Remove the polyethylene plugB on the same side as the indoor unit piping.
3. Fill water into the feed water pumpA using a feed water tank. In filling, be
sure to put the end of the pump in drain pan. (If the insertion is incomplete,
water may flow over the machine.)
4. Turn on the main power. The drain pump is forced to operate without any
remote controller operation. Make sure using a transparent drain hose(acces-
sory) that drain is discharged.
5. After confirmation, turn off the main power, remove the connector, and insert
the polyethylene plug into its original position, insulate drain hose.
➆
into the red connector (2P) on the side of the
Fig. 5-1
25 cm
Downward pitch of
more than 1/100
Fig. 5-2
Indoor unit
Collecvtive piping
Fig. 5-3
Hard vinyl chloride 90˚
elbow (field supply)
Hard vinyl
chloride (VP-25)
(field supply)
Hard vinyl chloride 90˚
elbow (field supply)
Be sure to use the supplied drain hose (Accessory).
Connect each connection with vinyl chloride adhesive. But never
use any adhesive over the indoor unit discharge port. Otherwise
the drain-up mechanism cannot be serviced later. Also, the end
connection may be eroded by resin and so cracked.
A Insert the pump's end 2 to 4 cm.
B Remove the polyethylene plug.
C About 1000 ml
D Water
E Filling port
7
Metal brace
1.5 – 2 m
Insulating material
Take as large as possible.
About 10 cm
Indoor unit
Indoor unit
Less than 300 mm
Drain hose
(Accessory)
Tie band (small)
(Accessory)
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