Fujitsu AS*9LSACW Service Instructions Manual page 80

INDOOR UNIT
CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING
(1) Cut a 65 mm diameter hole in the wall at the position shown in (Fig.
6).
(2) When cutting the wall hole at the inside of the installation frame, cut
the hole within the range of the left and right center marks 40 mm
below the installation frame.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 10 mm below over.
(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the
inside end.
(4) Always align the center of the wall hole. If misaligned, water leakage
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. 6)
(6) For left piping and right piping, cut the hole a little lower so that drain
water will flow freely. (Fig. 6)
INSTALLING THE WALL HOOK BRACKET
(1) Install the wall hook bracket so that it is correctly positioned horizon-
tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.
(2) Install the wall hook bracket so that it is strong enough to withstand
the weight of an adult.
G
Fasten the wall hook bracket to the wall with 6 or more screws through
the holes near the outer edge of the bracket.
G
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.
CAUTION
Install the wall hook bracket horizontally and
perpendicularly.
FORMING THE DRAIN HOSE AND PIPE
[Rear piping, Right piping, Bottom piping]
G
Install the indoor unit piping in the direction of the wall hole and bind
the drain hose and pipe together with vinyl tape. (Fig. 8)
G
Install the piping so that the drain hose is at the bottom.
G 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
After removing the drain hose, do not forget to install
the drain cap.
Drain cap
Insert the drain cap and drain hose
until it butts against the drain port.
OUTDOOR UNIT
OUTDOOR UNIT INSTALLATION
G Set the unit on a strong stand, such as one made of concrete blocks
to minimize shock and vibration.
G
Do not set the unit directly on the ground because it will cause trou-
ble.
Connector cover removal
G
Remove the tapping screws.
Installing the connector cover
(1) After inserting the two front hooks, then insert the rear hook.
(2) Tighten the tapping screws.
AIR PURGE
Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged in the
outdoor unit at the factory.
Close the high pressure side valve of the gauge manifold fully and do
not operate it during the following work.
1. Check if the piping connections are secure.
2. Check that the stems of 2-way valve and 3-way valve are closed
fully.
3. Connect the gauge manifold charge hose to the charging port
of the 3-way valve (side with the projection for pushing in the
valve core).
4. Open the low pressure side valve of the gauge manifold fully.
5. Operate the vacuum pump and start pump down.
6. Slowly loosen the flare nut of the 3-way valve and check if air
enters, then retighten the flare nut.
(When the flare nut is loosened the operating sound of the
vacuum pump changes and the reading of the compound
pressure gauge goes from minus to zero.)
7. Pump down the system for at least 15 minutes, then check if the
compound pressure gauge reads -0.1 MPa (-76 cmHg, -1 bar).
8. At the end of pump down, close the low pressure side gauge of
the gauge manifold fully and stop the vacuum pump.
9. Slowly loosen the valve stem of the 3-way valve. When the
compound pressure gauge reading reaches 0.1-0.2 MPa,
retighten the valve stem and disconnect the charge hose
from the 3-way valve charging port.
(If the stem of the 3-way valve is opened fully before the
charge hose is disconnected, it may be difficult to disconnect
the charge hose.)
Fig. 6
Center mark
Lower
5 to 10
65 mm dia. hole
mm low
Fasten with
vinyl tape
(Wall pipe)
(Wall cap)
(Inside) Wall (Outside)
Fig. 7
Wall hook bracket
Tapping screw
Wall hook
bracket
Fig. 8
Bind with vinyl tape
Right piping
Pipe (top)
Rear piping
Indoor unit drain hose
Bottom
(bottom)
piping
Indoor unit
drain hose
Indoor unit
Drain cap
drain hose
WARNING
(1) Install the unit where it will not be tilted by more
than 5°.
(2) When installing the outdoor unit where it may ex-
posed to strong wind, fasten it securely.
Fig. 12
CAUTION
(1) Refrigerant must not be discharged into
atmosphere.
(2) After connecting the piping , check the joints for
gas leakage with gas leak detector.
10. Fully open the valve stems of the 2-way valve and 3-way valve
using a hexagon wrench. (After the valve stem begins to turn,
turn it with a torque of less than 2.9 N
stops turning.)
11. Firmly tighten the 2-way valve and 3-way valve blank cap and
the charging port cap.
Fig. 13
Compound pressure gauge
-0.1 MPa
2-way valve
3-way valve
(-76 cmHg
Flare nut -1 bar)
Low pressure
side valve
Valve stem
Blank cap
Charge hose
Charging port
Charging port cap
Table 4
Tightening torque
Blank cap 19.6 to 24.5 N m (200 to 250 kgf
•
Charging port cap 12.3 to 15.7 N m (125 to 160 kgf
•
G For left piping and left rear piping, align the marks on the wall hook
bracket and shape the connection pipe.
G
Bend the connection piping at the bend radius of 70 mm or more and
install no more than 35 mm from the wall.
G
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]
Lower
G
Hang the indoor unit from the hooks at the top of the wall hook bracket.
G
Insert the spacer, etc. between the indoor unit and the wall hook
bracket and separate the bottom of the indoor unit from the wall.
10 mm
or over
65 mm dia. hole
Indoor unit
Wall hook bracket
CONNECTING THE PIPING
CONNECTION
Center notch
(1) Install the outdoor unit wall cap (supplied with the optional installation set
or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
Hook
(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.
(Table 2)
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
String burrs.
(3) Insert the flare nut onto the pipe and flare
the pipe with a flaring tool.
Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv-
entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .
INDOOR UNIT WIRING
(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.
Fig. 11
Right bottom of
indoor unit
Cord clamp
(There is a
terminal block
inside.)
Screw
For left outlet piping,
cut off the piping
outlet cutting groove
with a hacksaw. (1) Match the terminal block numbers and connection
cord colors with those of the outdoor unit.
Erroneous wiring may cause burning of the elec-
Remove the drain
tric parts.
cap by pulling at the
projection at the end (2) Connect the connection cords firmly to the terminal
of the cap with
block. Imperfect installation may cause a fire.
pliers, etc.
Additional charge
Refrigerant suitable for a piping length of 15 m is charged in the outdoor
unit at the factory.
When the piping is longer than 15 m, additional charging is necessary.
For the additional amount, see the table below.
Table 5
Pipe length
Additional refrigerant
OUTDOOR UNIT WIRING
(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.
Fig. 14
Tapping screw
Rear hooks
Front hooks
Connector cover
Connection cord wiring
Run the connection cord to the rear of the outdoor unit within the A
m (30 kgf cm) until it
• •
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)
(1) Match the terminal block numbers and connection
cord colors with those of the indoor unit.
Erroneous wiring may cause burning of the electric
parts.
Gauge manifold
(2) Connect the connection cords firmly to the terminal
Pressure gauge
block. Imperfect installation may cause a fire.
LO
HI
High FINISHING
pressure
(1) Insulate between pipes.
side valve
G
For rear, right, and bottom piping, overlap the connection pipe heat insulation and
(closed)
indoor unit pipe heat insulation and bind them with vinyl tape so that there is no gap.
G
For left and left rear piping, butt the connection pipe heat insulation and indoor unit
pipe heat insulation together and bind them with and vinyl tape so that there is no gap.
Charge
G
For left and left rear piping, wrap the area which accommodates the rear piping housing
hose
section with cloth tape.
G
For left and left rear piping, bind the connection cord to the top of the pipe with vinyl
tape.
G
For left and left rear piping, bundle the piping and drain hose together by wrapping
Vacuum pump
them with cloth tape over the range within which they fit into the rear piping housing
section.
(2) Temporarily fasten the connection cord along the connection pipe with vinyl tape. (Wrap
to about 1/3 the width of the tape from the bottom of the pipe so that water does not
enter.)
(3) Fasten the connection pipe to the outside wall with saddles, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain
water and wind cannot blow in.
(5) Fasten the drain hose to the outside wall, etc.
Fig. 16
(Saddle)
cm)
•
cm)
•
Pipe
Fig. 9
Bend (R70) with
a pipe bender
(Spacer)
Indoor unit
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. 10
Check if [L] is flared uniformly
Table 2
and is not cracked or scratched.
Flare nut
6.35 mm dia.
9.52 mm dia.
Table 3
Pipe outside
Die
diameter
A
ø 6.35 mm (1/4")
Pipe
ø 9.52 mm (3/8")
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the connection cord with a cord clamp.
Connection cord
Connection cord
CAUTION
(3) Always fasten the outside covering of the connec-
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
(4) Securely earth the power cord plug.
(5) Do not use the earth screw for an external connector.
Only use for interconnection between two units.
(1) When adding refrigerant, add the refrigerant from
(2) The maximum length of the piping is 20 m. If
15 m 20 m
Between 15 m and 20 m, when using a connection pipe other than
that in the table, charge additional refrigerant with 20g/1 m as the
None 100 g
criteria.
Earth screw
Control box
Cord clamp
Earth screw
Cord clamp
Fig. 15
Connector cord
CAUTION
(3) Always fasten the outside covering of the connec-
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
(4) Securely earth the power cord plug.
(5) Do not use the earth screw for an external connector.
Only use for interconnection between two units.
(Outside wall cap)
(Sealer putty)
Wall
(Outdoors)
Connection pipe
(6.35 mm dia.)
Align the marks.
Connection pipe
(9.52 mm dia.)
Top hooks
Wall hook
bracket
Bottom hooks
(Fitting)
Tighten with two wrenches.
Wrench (fixed)
Flare nut
Torque
wrench
To prevent gas leakage, coat the flare
Connection pipe
surface with refrigerator oil.
Indoor unit pipe
Flare nut tightening torque
Tightening torque standard
Tightening torque
(using a 20 cm wrench)
15.7 to 17.6 N • m
Wrist strength
(160 to 180 kgf cm)
•
29.4 to 41.1 N • m
Arm strength
(300 to 420 kgf cm)
•
Pipe outside diameter
A (mm)
Conventional (R22) flare tool
Flash tool for
R410A, clutch type
Clutch type Wing nut type
0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 1.5 to 2.0
Cord clamp
Tab
Square hole
Screw
Insert the tab into the square hole of the
indoor unit and fasten with a screw.
CAUTION
the charging port at the completion of work.
the units are further apart than this, correct
operation can not be guaranteed.
Sheath
Earth screw
Indoor unit terminal block Outdoor unit terminal block
Connection cord
Connector cord
Fig. 17
Overlap the insulation
Connection pipe
(heat insulation)
Indoor unit pipe
(heat insullation)
Bind the pipes together so
Vinyl tape
that there is no gap.
Pipe
Wrap with cloth tape
Drain hose
Cloth tape
Left piping
For connection from the left rear
Connection cord
Wall pipe Connection cord
Connection
pipe
Drain hose
Pipe
Drain hose
BAD BAD
BAD
Check the following:
Drain hose
GOOD
Saddle
Lifted up Wave End in water
P/N 9313209018-01