Indoor Unit - Friedrich MR18C3F Installation Manual

INDOOR UNIT

1.
CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING
(1) Cut a 3-2/16''(80 mm) diameter hole in the wall at the position shown
in (Fig.1).
(2) When cutting the wall hole at the inside of the wall hook bracket,
cut the hole within the range of the left and right center marks
3/8''(10 mm) below the installation frame.
When cutting the wall hole at the outside of the wall hook bracket,
cut the hole at least 3/8''(10 mm) below less.
(3) Cut the hole so that the outside end is lower 3/16'' to 3/8'' (5 to 10 mm)
than the inside end.
(4) Always align the center of the wall hole. If misaligned, water leak-
age will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into the wall
cap, fasten the cap with vinyl tape, and stick the pipe through the
hole. (The connection pipe is supplied in the installation set.)
(Fig.1)
(6) For left piping and right piping, cut the hole a little lower so that
drain water will flow freely. (Fig.1)
2.
INSTALLING THE WALL HOOK BRACKET
(1) Install the wall hook bracket so that it is correctly positioned hori-
zontally and vertically. If the wall hook bracket is titled, water will
drip to the floor.
(2) Install the wall hook bracket so that it is strong enough to with-
stand the weight of an adult.
●
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.
WARNING
If the wall pipe is not used, the cord interconnecting
the indoor and outdoor units may touch metal and
cause electric leakage.
3.
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. (Fig. 3)
●
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.
CAUTION
(1) In order to align the drain hose and drain cap, be
sure to insert securely and vertically. Incline in-
sertion will cause water leakage.
(2) When inserting, be sure not to attach any mate-
rial besides water. If any other material is attached,
it will cause deterioration and water leakage.
(3) After removing drain hose, be sure not to forget
mounting drain cap.
(4) Be sure to fix the drain hose with tape to the bot-
tom of piping.
(5) Prevent drain water frozen under low tempera-
ture environment.
When installing indoor unit's drain hose outdoors,
necessary measure for frost protection should be
taken to prevent drain water frozen.
● Under low temperature environment (when out-
door temperature under 32 °F), after cooling op-
eration 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 be resulted
for indoor unit.
Center mark
Fig. 1
3-2/16''(80 mm)
dia. hole
Lower
Lower
3/8''(10 mm) 3/8''(10 mm)
or over or over
3-2/16''(80 mm) dia. hole
(A 2-9/16''(65mm)
Fasten with 3/16'' to 3/8''
diameter hole is
vinyl tape (5 to 10 mm)
possible for the right-
low
hand side.)
(Wall pipe)
(Wall cap)
(Inside)
(Outside)
Wall
Center notch
Wall hook bracket
Fig. 2
Tapping screw
Wall hook
bracket
Counter weight
CAUTION
Install the wall hook bracket horizontally and perpen-
dicularly.
Fig. 3
Bind with vinyl tape
Right piping
Pipe (top)
Rear piping
Bottom 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
Indoor unit
at the projection at the end of
drain hose Drain cap
the cap with pliers, etc.
Removal method of drain Installation method of
hose drain hose
● ●
Remove the screw at the left of Vertically insert the drain hose
toward the inside, so that the
drain hose and pull out drain
drain fixture (blue) can accu-
hose.
rately align with the screw hole
around the drain cock.
After inserting and before re-
Screw
Drain hose
placing, please reinstall and fix
the removed screws.
Drain fixture (blue)
Screw hole
Drain fixture
(blue)
Drain cock
●
Be sure to install around the drain hose connector.
●
As the screw is inside, be sure to use screwdriver treated with magnet.
●
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 2 - 3/4''(70 mm) or
more and install no more than 1- 3/8''(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
Hook
4.
CONNECTING THE PIPING
CONNECTION
String
(1) Install the outdoor unit wall cap (supplied with the optional in-
stallation set or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the
nut hand tight, tighten the nut to the specified tightening torque
with a torque wrench. (Tighten the flare nut of the outdoor unit
3-way valve after air purging.)
FLARING
(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 the burrs.
(3) Insert the flare nut onto the pipe and flare the pipe with a flaring
tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
L dimension
Thin pipe 1/4" (6.35 mm)dia. ...... 1/16" (1.4 to 1.7 mm)
Thick pipe 1/2" (12.7 mm)dia. ...... 5/64" (1.9 to 2.2 mm)
BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse them.
Extend the pipe
OK
by unwinding it.
Do not bend the pipes in an angle more than 90°.
Screw
When pipes are repeatedly bent or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or stretch
the pipes more than three times.
Drain hose
Fig. 4
Align the marks.
Bend 2-3/4''(R70)
with a pipe bender
Connection pipe
(1/2''(12.7 mm) dia.)
(Spacer)
Indoor unit
(Fitting)
After hooking the indoor unit to the top hook, hook the fittings of the
indoor unit to the two bottom hooks while lowering the unit and
pushing it against the wall.
Fig. 5
Tighten with two wrenches.
Wrench (fixed)
Flare nut
Torque wrench
Connection pipe
Indoor unit pipe
Table 2 Flare nut tightening torque
Flare nut
1/4" (6.35 mm)dia.
1/2" (12.7 mm)dia.
CAUTION
(1) Fasten a flare nut with a torque wrench as instructed in this manual. If
fastened too tight, the flare nut may be broken after a long period of time
and cause a leakage of refrigerant.
(2) During installation, make sure that the refrigerant pipe is attached firmly
before you run the compressor. Do not operate the compressor under the
condition of refrigerant piping not attached properly with 2-way or 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
NO
Connection pipe
(1/4" (6.35 mm) dia.)
Top hooks
Wall hook
bracket
Bottom hooks
To prevent gas leakage,
coat the flare surface
with refrigerator oil.
Tightening torque
11.57 to 13.02 ft•lbs
(160 to 180 kgf•cm)
36.17 to 39.78 ft•lbs
(500 to 550 kgf•cm)