Hitachi RAI-50PPD Installations- Und Betriebshandbuch Seite 25

DRAIN PIPING
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Drainage and water leakage check
After performing drain piping work and the electrical wiring and
before installing the air panel, check to ensure that water flows
smoothly according to the following procedure.
• Drainage operation by float switch
The following is regular procedure to check the float switch
operation.
a. Turn ON the power supply.
b. Pour 1500cc to 2000cc of water gradually into the drain
pan.
c. Check to ensure that the water flows smoothly inside the
transparent drain pipe and drained at the pipe end, and
that no water leakage occurs.
d. If the end of the drain pipe cannot be checked visually,
pour another 1500 ~ 2000cc of water to the drain pan.
If the water overflows from the drain pan, there might
be some failure inside the drain pipe. Recheck the drain
pipe.
Vinyl tape
(Gray)
Position for checking drainage
Pouring water through air outlet
Insert the end of the
hose between the
heat exchanger and
the drain pan and
bend it down
!
C A U T I O N
Be careful that water does not splash on the electrical parts such as the
fan motor, float switch or thermistors.
17 PMML0477 rev.0 - 07/2017
Drain hose
(Accessory)
for checking drainage
(Transparent)
Drain pan
Pump
Water
(1500 to 2000cc)
Bucket
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Simplified Operation of Drain-up Mechanism
The following is the simplified operation procedure of the drain-
up mechanism.
a. Turn OFF the power supply.
b. Turn ON the power supply and start the simplified
operation of the drain-up mechanism by set the SW503
to "TEST" position.
c. Turn OFF the power supply.
d. Set back the SW503 position to "NORMAL".
.
SW503
PCB
Terminal block
Insulate the drain pipe after connecting the drain hose. Do not
use adhesive between the drain pipe connection and the drain
hose.
Insulation (5T×25×500)
(Accessory)
Completely wrap up the
transparent area of the drain
pipe end connection
?
N O T E
If there is excessive clearance between the drain pipe connection and the
drain hose, add a sealing material between both parts in order to fit and
not deform the drain hose.
Indoor unit
Electrical box
Air panel
(mm)
Insulation (5T×100×200)
(Accessory)
Wrap up the drain hose completely
to cover the hose band
Hose band (accessory)