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5.2. Install the drain pipe
CAUTION
Be sure to fix the drain hose to the drain port with the hose band. Do not apply glue to
the drain port. Otherwise it will cause water leakage.
(1) Be sure to use
supplied drain
hose (a) and hose
band (b).
(b) Hose band (accessories)
Drain port
(a) Drain hose (accessories)
Hard PVC side
Hose band
4 mm or less
20 mm
(b) Hose band
(a) Drain hose
Fasten the hose band (b) at the position where
horizontal against ground.
The hose band (b) must be positioned at the right
side of the drain hose (a) as in the figure.
(2) Be sure to connect
Drain pipe with adhe
-
sive (polyvinyl chloride)
so that there is no
leakage.
Applying
area of
adhesive
Joint pipe (lo
-
cally purchased)
Drain pipe (VP25)
(locally purchased)
4 mm or less
CAUTION
Do not connect to the drain hole with adhesive. Using adhesive may cause damage and
water leaks.
(3) After installing the drain hose (a), check if the drainage is smooth.
CAUTION
To prevent excessive force on drain hose (a), avoid bends or twists. (To bend or twist
may cause water leaks.)
(4) After checking for
drainage, attach
the drain hose
insulation B (c) to
insulate, following the
instructions as in the
figures.
To avoid space with
drain hose (a) and
hose band (b), press
firmly the drain hose
insulation B (c).
(c) Drain hose insulation B
(accessories)
Ensure there
is no space.
• STEP1 - STEP3
Butt the insulation
against the unit.
STEP 1
Unit
Slit
Press firmly
Press firmly
STEP 2
Slit
Press firmly
Roll the in
-
sulation over
the joint.
Press firmly
STEP 3
Press firmly
Slit
4.4. Installing heat insulation
Install the heat insulation material after performing a refrigerant leak check (refer to the
installation manual for the outdoor unit for details).
4.4.1. Coupler heat insulation
• Insulate by the coupler heat insulation
(accessories) around the gas pipe and
liquid pipe of indoor side.
• After installing the coupler heat insula
-
tion, wrap both end with vinyl tape so
that there is no gap.
• After affixing the coupler heat insulation,
secure it with 2 cable ties (large), one on
each end of the insulation.
• Make sure that the cable ties overlap the
heat insulation pipe.
Coupler heat
insulation
(accessories)
Cover this portion with
heat insulation.
Cable tie (large)
(accessories)
Heat insulation
CAUTION
After checking for gas leaks (refer to the Installation Manual of the outdoor unit), per
-
form this section.
Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do
so may cause water leaks.
5. INSTALLING DRAIN PIPES
WARNING
Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat ex
-
change erosion may occur)
Insulate the parts properly so that water will not drip from the connection parts.
Check for proper drainage after the construction by using the visible portion of transpar
-
ent drain port and the drain piping final outlet on the body.
CAUTION
Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)
5.1. Drain piping
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an insulation material as needed, to prevent the pipes from freezing.
• Install the pipes in a way that allows for the removal of the control box.
Gap of 1.5 to 2 m
700 mm or less
Horizontal or
upward gradient
Drain hose (accessories)
Ceiling
Supporter
Max. 300 mm
Locally arranged pipe
GOOD
VP25 [O.D
32 mm or more]
Rise
Air bleeding
Trap
Drain hose is not used
PROHIBITED
Observe the following procedures to construct centralized drain pipe fittings.
VP30 or more [O.D 38 mm or more]
Downward gradient 1/100 or more
700 mm or less
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