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English 10
The drainage can be checked with the water level change
in the drain pan through the water inlet.
CAUTION
• Do not touch the drain pump.
Otherwise, an electric shock may be received.
• Do not impose external force on the float switch.
Otherwise, a failure may result.
5. On completion of the drainage check, shut off the power
supply and disconnect the power supply wiring.
6. Put the control box cover to the original position.
[After electrical work]
• After completion of 8. DUCT WORK provide approximately
1/4 gal (1 ) of water gradually into the drain pan through the
water inlet on the bottom of the drain socket, and check that
the water is drained while the air conditioner is in cooling
operation according to 11. FIELD SETTING and 12. TEST
OPERATION. Make sure that the water is not spilled onto the
electric parts of the drain pump and others.
(3) Be sure to conduct thermal insulation work on the fol-
lowing portions, or otherwise water leakage may occur
as a result of dew condensation.
• Drain piping indoors
• Drain socket
• On completion of the drainage check, refer to the follow-
ing illustration, and use the provided large sealing pad
(6) and insulate the metal clamp (1) and drain hose (2).
8. DUCT WORK
Pay utmost attention to the following items and conduct
ductwork.
• Check that the duct will not be in excess of the setting range
of external static pressure for the unit. (Refer to Engineering
Data for the setting range. Each model has each setting
range of external static pressure.)
• Attach a canvas duct each to the air outlet and air inlet so that
the vibration of the equipment will not be transmitted to the
duct or ceiling.
Use a sound-absorbing material (insulation material) for the
lining of the duct and apply vibration insulation rubber to the
suspension bolts.
• At the time of duct welding, protect the opening of the duct so
that the sputter will not come in contact with the drain pan or
the filter.
• If the metal duct pass through a metal lath, wire lath, or metal
plate of a wooden structure, separate the duct and wall elec-
trically.
• Be sure to insulate the duct for the prevention of dew conden-
sation. (Material: Glass wool or styrene foam; Thickness:
1 in. (25 mm))
• Be sure to attach a field supplied air filter to the air inlet of the
unit or field supplied inlet in the air passage on the air suction
side. (Be sure to select an air filter with a duct collection effi-
ciency of 50 weight percent.)
• Explain the operation and cleaning method of the field sup-
plied components (i.e., the air filter, air inlet grille, and air out-
let grille) to the customer.
• Locate the air outlet grille on the indoor side for the preven-
tion of drafts in a position where indirect contact with people.
• The air conditioner incorporates a function to adjust the fan to
rated speed automatically. (11. FIELD SETTING)
Therefore, do not use booster fans midway in the duct.
Connection method of ducts on air inlet and outlet sides.
• Connect the field supplied duct in alignment with the inner
side of the flange.
• Connect the flange and unit with the flange connection screw
(3).
• Wrap aluminum tape around the flange and duct joint in order
to prevent air leakage.
CAUTION
Connect the flange to the unit with the flange connection screw
(3) even in case of no duct connection.
Water inlet
Drain socket
Drain pan
Control box cover
Terminal block for
power supply
Screw
Water inlet cover
Control box
Refrigerant piping
Air outlet
Socket for maintenance
(with rubber cap)
Drain pump position
Plastic water container
Make sure that the
seam faces upward.
Metal clamp (1)
(accessory)
Large sealing pad (6)
(accessory)
3/16 in. (4 mm) max.
Unit
Flange on air outlet side
(provided with the unit)
Insulation material
(field supply)
Canvas duct
(field supply)
Flange on air inlet side
(provided with the unit)
Insulation material
(field supply)
Air inlet
Air outlet
Screws for duct
flanges (3)
(accessory)
Screws
for duct
flanges (3)
(accessory)
01_EN_3P530815-1.fm Page 10 Tuesday, July 10, 2018 6:20 PM
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