Installation guide

En-4
• For left piping, left bottom piping and left rear piping, align the marks on the wall hook
bracket and shape the connection pipe.
• Bend the connection piping at a bend radius of 70 mm or more and install no more
than 35 mm from the wall
Connection pipe large
Connection pipe small
Bend R70 mm with
a pipe bender
Align the marks
CAUTION
Install the wall-hook bracket both horizontally and vertically aligned.
Misaligned installation may cause water leakage.
6.5. Forming the drain hose and pipe
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Rear piping, Right piping, Bottom piping
• Install the indoor unit piping in the direction of the wall hole and bind the drain hose
and pipe together with vinyl tape.
•
Install the piping so that the drain hose is at the bottom.
•
Wrap the pipes of the indoor unit that are visible from the outside with decorative tape.
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For Left rear piping (Drain hose), Left piping (Drain hose)
Interchange the drain cap and the drain hose.
CAUTION
• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting the drain hose, no other material than water should be applied.
Application of other material than water will cause deterioration of the hose, and may
cause water leakage.
• After you remove a drain hose, be sure to attach the drain cap.
• When you secure the piping and drain hose with tape, arrange the drain hose so that
it is at the bottom of the piping.
• For drain hose piping in low temperature environment, you need to apply freeze
protection to prevent a frozen drain hose.
After cooling operation is performed in low temperature environment (when outdoor
temperature under 0 °C), water in the drain hose could be frozen. Frozen drain water
will block the water ow in the hose, and may cause water leakage at the indoor unit.
Right piping
Bottom piping
Bind with vinyl tape
(Rear)
Refrigerant pipes (top)
Rear piping
Indoor unit drain hose (bottom)
For left outlet piping
(Drain hose), cut off
the piping outlet cutting
groove with a hacksaw.
Indoor unit
drain hose
Drain cap
Remove the drain cap by pull-
ing at the projection at the end
of the cap with pliers, etc.
(Rear)
Removing the drain hose
Remove the screw at the left of
drain hose and pull out drain hose.
Installing the drain hose
Vertically insert the drain hose toward the
inside, so that the drain xture (white) can
accurately align with the screw hole around
the drain cock.
After inserting and before replacing, please
reinstall and x the removed screws.
• Please hold around the joint of the drain hose during work.
•
As the screw is inside, be sure to use screwdrivers treated with magnet.
Screw
Drain xture
Drain hose
Screw hole
Drain cock
Drain hose
Screw
Drain xture
Installing the drain cap
Use a hexagonal wrench 4 mm at opposite side to
insert the drain cap, till the drain cap contacts the tip
of the drain cock.
•
After passing the indoor piping and drain hose through the wall hole, hang the indoor unit on
the hooks at the top and bottom of the wall hook bracket.
CAUTION
Insert the drain hose and drain cap into the drain port, making sure that it comes
in contact with the back of the drain port, and then mount it. If the drain hose is not
connected properly, leaking will occur.
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Installing the indoor unit
• Hang the indoor unit from the hooks at the top of the wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate
the bottom of the indoor unit from the wall.
Top hooksCenter of upper rail
(Fittings) Bottom hooks
Indoor unit
Wall hook bracket
(Spacer)
• After hooking the indoor unit to the top hook, hook the ttings of the indoor unit to the
bottom hooks while lowering the unit and pushing it against the wall.
6.6. Pipe connection
CAUTION
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the are nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a ame.
6.6.1. Flaring
Use special pipe cutter and are tool designed for R410A pipework.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.
(3) Insert the are nut (always use the are nut attached to the indoor unit(s) and outdoor
unit or branch box respectively) onto the pipe and perform the are processing with a
are tool. Use the special R410A are tool, or the conventional are tool. Leakage of
refrigerant may result if other are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Die
A
Pipe
B
L
Check if [L] is flared uniformly
and is not cracked or scratched.
No gap
Hexagonal
wrench
Drain
cock
Drain cap
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