Fujitsu 9318739183 Installation Manual page 4

5.4. Installing the wall hook bracket
(1) Install the wall hook bracket so that it is correctly positioned horizontally and vertically.
If the wall hook bracket is tiled, water will drip to the fl oor.
(2) Install the wall hook bracket so that it is strong enough to support the weight of the unit.
• Fasten the wall hook bracket to the wall with 6 or more screws through the holes near the
outer edge of the bracket.
• Check that there is no rattle at the wall hook bracket.
Wall hook bracket
Install the wall hook bracket level, both horizontally and vertically.
5.5. Forming the drain hose and pipe
[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.
[For Left rear piping, Left piping]
Interchange the drain cap and the drain hose.
• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting, be sure not to attach any material besides water. If any other
material is attached, it will cause deterioration and water leakage.
• After removing drain hose, be sure not to forget mounting drain cap.
• Be sure to fi x the drain hose with tape to the bottom of piping.
• Prevent drain water freezing under low temperature environment.
When installing indoor unit's drain hose outdoors, necessary measure for frost
protection should be taken to prevent drain water freezing.
Under low temperature environment (when outdoor temperature under 32 °F (0 °C)),
after cooling operation is executed, water in the drain hose could be frozen. Once drain
water is frozen, the drain hose will be blocked and water leakage may result at the
indoor unit.
Installation method of Drain cap
Right piping
Bottom
Indoor unit
drain hose
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.
• Attach the Drain hose insulation to the drain hose.
Drain hose
En-4
Tapping screw (large)
(Quantity: 8)
CAUTION
CAUTION
Bind with vinyl tape
Pipe (top)
Rear piping
Indoor unit drain hose
(bottom)
piping
For left outlet piping, cut
off the piping outlet cutting
groove with a hacksaw.
Remove the drain cap by
pulling at the projection at
the end of the cap with pli-
ers, etc.
Drain cap
CAUTION
Drain hose insulation
• For left 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 3-15/16 in. (100 mm) or more and install
no more than 1-3/8 in. (35 mm) from the wall.
• 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.
[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.
Indoor unit
Wall hook bracket
Alignment marks
Wall hook
bracket
Connection piping
Indoor
unit
(Fitting)
After hooking the indoor unit to the top hook, hook the fi ttings of the indoor unit to the 2
bottom hooks while lowering the unit and pushing it against the wall.
5.6. Flare connection (Pipe connection)
Tighten the fl are nuts with a torque wrench using the specifi ed tightening method. Oth-
erwise, the fl are nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a fl ame.
5.6.1. Flaring
Use special pipe cutter and fl are tool exclusive for R410A.
(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 fl are nut (always use the fl are nut attached to the indoor unit(s) and outdoor
unit respectively) onto the pipe and perform the fl are processing with a fl are tool. Use
the special R410A fl are tool, or the conventional fl are tool. Leakage of refrigerant may
result if other fl are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from en-
tering the pipes.
Die
A
Pipe
(Spacer)
Small piping
Large piping
Top hooks
Wall hook
bracket
Bottom hooks
CAUTION
Check if [L] is flared uniformly and
is not cracked or scratched.
B
L