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ELECTRICAL WIRING
3 Connecting drain piping.
a. Prepare a polyvinyl chloride pipe with a 26mm outer
diameter. (VP20 (based on JIS K6741) is recommended.)
b. When the drain hose is used, do not create rising part or
twist.
c. Insulate surely the polyvinyl chloride pipe after
connecting.
d. Tighten the hose clamp after surely inserting the polyvinyl
chloride pipe.
e. The drain pipe must be performed with a down-slope
pitch of 1/25 to 1/100.
f. Wrap the insulation (accessory) around the hose clamp
to cover drain hose, drain pan, hose clamp without gap.
?
N O T E
•
Do not connect the drain pipe with sanitary or sewage piping or any
other drainage piping.
•
Do not tighten the drain pipe and the refrigerant pipe together by the
hose clamp.
Drain hose
Hose clamp
(attach to
(accessory)
indoor unit)
Drain boss
Gluing
is not
required
Drain
pan
Insulation
Connect tightly
(attached to drain hose)
Insulation (accessory)
?
N O T E
•
Connect the field-supplied drain pipe to the drain hose by the polyvinyl
chloride adhesive. Perform firmly cleaning the connection surface,
applying the adhesive, inserting the pipe, retaining and curing
according to the adhesive manufacturer information. The adhesive
Eslon No.73 (Sekisui Chemical Co. Ltd) is recommended.
15 ELECTRICAL WIRING
!
D A N G E R
•
The electrical wiring work must be performed by authorized
installers. If not, it may cause an electric shock or a fire.
•
Perform the electrical work according to each regulation of
region and Installation and Operation Manual, and the dedicated
electrical circuit must be used. If not performing the electrical
wiring work completely or a capacity shortage of the power
circuit, it will cause an electric shock or a fire.
•
Use the specified cables for wiring between the outdoor unit and
indoor units. Selecting incorrect cables will cause an electric
shock or a fire.
•
Install an ELB (Earth Leakage Breaker) and CB (Circuit Breaker)
in the power source. Failure to do so may lead to electric shock
or a fire in the event of electrical failure.
•
Turn OFF the main power switch of the indoor unit and the
outdoor unit before an electrical wiring work or a periodical
check is performed. If not, it will cause an electric shock or a fire.
22
PMML0551 rev.4 - 07/2023 - A10762310A
Hose clamp
(accessory)
Insulate without
gap and wrap the
tape around the
connection
Insulation
(field-supplied)
Create down-slope
for well drainage.
Polyvinyl chloride
pipe (VP20, field-
supplied)
Gluing is not required
Insulation (accessory)
•
Insert the drain hose completely. If not, or twisted, it will cause water
leakage.
•
Attach the hose clamp to be the screw part upward not to touch the
screw part to the air filter.
•
If the polyvinyl chloride adhesive is used to the drain boss which is
ABS resin made, a crack and water leakage may occur.
•
The tightening torque for hose clamp shall be 3.0 to 3.5Nm.
•
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.
4 After the drain piping work is completed, check that water
flows smoothly by pouring water into the drain pan by hose.
?
N O T E
The optional drain-up mechanism is required when the drain piping is
connected from the upper surface of indoor unit. The details shall be
referred to Installation and Operation Manual of the drain-up mechanism.
Insulation
(accessory)
Rear side piping
!
C A U T I O N
Pay attention not to splash water to the electrical parts such as the fan
motor, the float switch or thermistors.
•
Check to ensure that the indoor fan and the outdoor fan have
stopped before electrical wiring work or a periodical check is
performed.
•
Protect the wires, drain pipe, electrical parts, etc. from rats or other
small animals. If not protected, rats may gnaw at unprotected
parts and at the worst, a fire will occur.
•
Tighten screws according to the following torque.
M3.5: 1.2 Nm
M4: 1.0 to 1.3 Nm
•
Connect earth wires for the outdoor / indoor unit to prevent an
electrical shock or an unexpected accident. The earth resistance
must be less than 1 megohm. The earth work must be performed
by authorized installers.
•
Turn completely OFF the power source to prevent an electrical
shock when opening the service cover to perform the electrical
work or the maintenance.
•
Pay attention not to bite electrical wirings when attaching the
service cover. It may cause an electrical shock or fire.
Hose clamp
Right side piping
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