Fujitsu AB Series A18LATN Service Instruction page 127

Floor Console/Under Ceiling Dual Type
INSTALLATION
INSTRUCTION SHEET
(PART NO. 9375754020)
For authorized service personnel only.
This mark indicates procedures which, if improperly performed, are most likely to result in the death of or
DANGER
serious injury to the user or service personnel.
This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of
WARNING
the user.
This mark indicates procedures which, if improperly performed, might possibly result in personal harm to
CAUTION
the user, or damage to property.
DANGER
Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After
turning off the power, always wait 5 minutes or more before touching electrical components.
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant models.
However, pay careful attention to the following points:
1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and
installation and service tools are special. (See the table below.)
Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the
conventional piping and flare nuts with the R410A piping and flare nuts.
2 Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with
conventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is
1/2 UNF 20 threads per inch.]
3 Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also, when
storing the piping, securely seal the openings by pinching, taping, etc.
4 When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and
always charge from the liquid phase side whose composition is stable.
Special tools for R410A
Tool name Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
Gauge manifold
It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm 2 ) for high pressure. –0.1 to
3.8 MPa (–76 cmHg to 38 kgf/cm 2 ) for low pressure.
Charge hose To increase pressure resistance, the hose material and base size were changed.
Vacuum pump A conventional vacuum pump can be used by installing a vacuum pump adapter.
Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the
Thicknesses of Annealed Copper Pipes (R410A)
amount of residual oil is less than 40 mg/10 m. Do not use copper pipes
Pipe outside diameter
having a collapsed, deformed or discolored portion (especially on the interior
surface). Otherwise, the expansion valve or capillary tube may become 6.35 mm (1/4 in.)
blocked with contaminants.
9.52 mm (3/8 in.)
As an air conditioner using R410A incurs pressure higher than when
12.70 mm (1/2 in.)
using conventional refrigerant, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in the table. 15.88 mm (5/8 in.)
Never use copper pipes thinner than that in the table even when it is
19.05 mm (3/4 in.)
available on the market.
STANDARD PARTS
Name and Shape Q'ty
The following installation parts are furnished. Use them as required. Drain hose
INDOOR UNIT ACCESSORIES 1
Name and Shape Q'ty Application
Cover plate (left)
Insulation (drain hose) Adhesive type 70 × 230
1
1
Cover plate (right)
VT wire For fixing the drain hose
1 L 280 mm
1
Tapping screw (ø4 × 10)
2
Installation template For positioning the indoor
unit
1 For under ceiling type
Bracket (left) For suspending the indoor
unit from ceiling
1
Bracket (right)
1
Anchor bolt (M12)
4
Spring washer
4
Special nut
4
Wall bracket For suspending the indoor
unit on the wall.
2
Tapping screw (ø4 × 20) For fixing the wall bracket.
6
Coupler heat insulator For indoor side pipe joint
(large) (Large pipe)
1
Coupler heat insulator For indoor side pipe joint
(small) (Small pipe)
1
Nylon fastener For fixing the drain hose
1
For authorized service personnel only.
WARNING
1 For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
2 Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from our standards parts. This instal-
lation instruction sheet describes the correct connections using the installation set available from our standard parts.
3 Installation work must be performed in accordance with national wiring standards by authorized personnel only.
4 Do not turn on the power until all installation work is complete.
CAUTION
This installation instruction sheet describes how to the indoor unit only.
To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.
To install the remote controller, refer to the installation instruction sheet included with the remote controller unit.
• • • • • Be careful not to scratch the air conditioner when handling it.
• • • • • After installation, explain correct operation to the customer, using the operating manual.
• • • • • Let the customer keep this installation instruction sheet because it is used when the air conditioner is serviced or moved.
CONNECTION PIPE REQUIREMENT
CAUTION
Refer to the installation instruction sheet of the outdoor unit for description of the length of connecting pipe or for difference of
its elevation.
18,000 24,000
MODEL
BTU/h model BTU/h model
Small
6.35 mm (1/4 in.) 6.35 mm (1/4 in.)
Diameter
Large
12.70 mm (1/2 in.) 15.88 mm (5/8 in.)
• • • • • Use pipe with water-resistant heat insulation.
CAUTION
Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70 %, install heat
insulation around the refrigerant piping. If the expected humidity level is 70-80 %, use heat insulation that is 15 mm or thicker and
if the expected humidity exceeds 80 %, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 20 °C).
ELECTRICAL REQUIREMENT
Connection cord (mm 2 )
MAX. MIN.
2.5 1.5
• • • • • Use conformed cord with Type 245 IEC57.
• • • • • Install all electrical works in accordance to the standard.
• • • • • Install the disconnect device with a contact gap of at least 3 mm in all poles nearby the units. (Both indoor unit and outdoor unit)
Thickness
0.80 mm
0.80 mm
0.80 mm
1.00 mm
1.20 mm
SELECTING THE MOUNTING POSITION
Application
WARNING
Install at a place that can withstand the weight of the indoor and outdoor units and install positively so that the units will not
topple or fall.
CAUTION
1 Do not install where there is the danger of combustible gas leakage.
2 Do not install near heat sources.
3 If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.
Decide the mounting position with the customer as follows:
INDOOR UNIT
(1) Install the indoor unit level on a strong wall, floor, ceiling which is not subject to vibration.
(2) The inlet and outlet ports should not be obstructed : the air should be able to blow all over the room.
(3) Install the unit near an electric outlet or special branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc., into consideration and leave the spaces as shown in the figure. Also install the unit where the filter can be removed.
• • • • • Floor console • • • • • Under ceiling
Left Right 15 cm (6") or more
30 cm (12") or more 30 cm (12") or more
Floor console Under ceiling
To outdoor unit
Indoor unit
INSTALLATION PROCEDURE
Install the room air conditioner as follows:
1
PREPARING INDOOR UNIT
INSTALLATION
1. REMOVE THE INTAKE GRILLE
Open the intake grille and remove the three screws.
Machine screw
Tapping screw
Tapping screw
Intake grille
Remark: The main unit can be wired before the indoor unit is in-
stalled. Select the most appropriate installation order.
2
INDOOR UNIT INSTALLATION
A. FLOOR CONSOLE TYPE
1. DRILLING FOR PIPING
Select piping and drain directions.
The piping and drain can be made in three directions as shown below.
VIEW
For direction , bore the oval hole shown in the above figure.
The drain hose can be connected to either the left or right side.
Drain hose
Drain hose
(Left side) (Right side)
When the directions are selected, drill a 10 cm (4") dia. hole on the wall so
that the hole is tilted downward toward the outdoor for smooth water flow.
When the pipe is led out from the rear, make a hole as shown in the figure,
at the position shown.
Wall
6 mm (1/4")
100 mm (4")
Indoor side
Outdoor side
3
CONNECTING THE PIPE
CAUTION
1 Do not use mineral oil on flared part. Prevent mineral
oil from getting into the system as this would reduce
the lifetime of the units.
2 While welding the pipes, be sure to blow dry nitrogen
gas through them.
3 The maximum lengths of this product are shown in the
table. If the units are further apart than this, correct
operation can not be guaranteed.
1. 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 (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 conventional flare tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
Ceiling
Die
Left Right
Indoor unit
A
Pipe
30 cm (12") or more
Dimension A (mm)
Ceiling
Pipe outside diameter
Flare tool for R410A, clutch type
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
230 cm (90-1/2") 12.70 mm (1/2 in.) 0 to 0.5
2 cm (3/4")
or more
or more
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
Floor
Pipe outside diameter Dimension B
-0.4
6.35 mm (1/4 in.) 9.1
9.52 mm (3/8 in.) 13.2
12.70 mm (1/2 in.) 16.6
15.88 mm (5/8 in.) 19.7
19.05 mm (3/4 in.) 24.0
When using conventional flare tools to flare R410A pipes, the dimension
A should be approximately 0.5 mm more than indicated in the table (for
flaring with R410A flare tools) to achieve the specified flaring. Use a thick-
ness gauge to measure the dimension A.
Pipe outside Width across flats
Width across
flats diameter of Flare nut
6.35 mm (1/4 in.) 17 mm
9.52 mm (3/8 in.) 22 mm
12.70 mm (1/2 in.) 26 mm
15.88 mm (5/8 in.)
29 mm
19.05 mm (3/4 in.) 36 mm
Indoor unit
To outdoor unit
When installing set to wall install the accessory wall bracket at the posi- B. UNDER CEILING TYPE
tion as shown in the figure, and mount the set to it.
Using the installation template, drill holes for piping and anchor bolts (for
99 cm (39")
holes).
24.5 cm
50 cm (20")
(9-5/8") Wall bracket
900 mm (35-7/16")
Side of set
6.5 cm (2-1/2") 200 mm
10 cm (4") hole (7-7/8" )
5 cm (2") hole
12.5 cm (5") 10 cm (4")
2. INSTALLING THE DRAIN HOSE 1. DRILLING FOR PIPING
Select whether the drain hose will be connected to the left or right side.
Select piping and drain directions.
Insert the drain hose into the drain pan, then secure the drain hose with a
nylon fastener.
Drain pan
Nylon fastener
Drain hose
Wrap the insulation (drain hose) around the drain hose connection.
For direction , bore the oval hole shown in the above figure.
Drain pan
Insulation (Drain hose)
Install the drain hose at the rear; it should not be installed
on the top or right side.
Drain hose
When the directions are selected, drill 80 mm (3-1/8") and 50 mm (2") or
150 mm (6") dia. hole on the wall so that the hole is tilted downward to-
ward the outdoor for smooth water flow.
Be sure to arrange the drain hose so that it is leveled lower than the drain
hose connecting port of the indoor unit.
Good Bad Bad
Indoor side
Hole
2. DRILLING HOLES FOR ANCHOR BOLTS AND
INSTALLING THE ANCHOR BOLTS
Arrange the drain
Drain hose
With a concrete drill, drill four 12.7 mm (1/2") dia. holes.
hose lower than
this portion.
CAUTION
Do not install the unit so that the drain hose side is too
high. Height A should be less than 5 mm.
Insert the anchor bolts into the drilled holes, and drive the pins completely
into the anchor bolts with a hammer.
Drain hose
Bad Bad
2. BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse them.
Flare nut
Do not bend the pipes in an angle more than 90°.
6.35 mm (1/4 in.) dia.
When pipes are repeatedly bend or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or stretch
9.52 mm (3/8 in.) dia.
the pipes more than three times.
12.7 mm (1/2 in.) dia.
CAUTION
15.88 mm (5/8 in.) dia.
1 To prevent breaking of the pipe, avoid sharp bends.
19.05 mm (3/4 in.) dia.
Bend the pipe with a radius of curvature of 150 mm or
over.
Do not remove the cap from the connection pipe before connecting
the pipe.
2 If the pipe is bent repeatedly at the same place, it will
break.
Be sure to connect the large pipe after connecting the small
3. CONNECTION PIPES
pipe completely.
(1) Centering the pipe against port on the indoor unit, turn the flare nut
with your hand.
Be sure that the small pipe is completely installed before connecting 4. HEAT INSULATION ON THE PIPE JOINTS
the large the pipe.
(INDOOR SIDE ONLY)
Put coupler heat insulator on the joints (indoor side only).
CAUTION
Be sure to apply the pipe against the port on the indoor
B unit correctly. If the centering is improper, the flare nut
cannot be tightened smoothly. If the flare nut is forced to
turn, the threads will be damaged.
(2) Install the outdoor unit wall cap (supplied with the optional installation
set or procured at the site) to the wall hole pipe.
No gap
(3) Connect the outdoor unit and indoor unit piping.
(4) After matching the center of the flare surface and tightening the nut
Coupler heat
hand tight, tighten the nut to the specified tightening torque with a insulator
torque wrench. (large)
Tighten with two wrenches.
Wrench (fixed)
Flare nut
Torque wrench
0 (mm)
Indoor unit
Connection pipe To prevent gas leakage,
pipe
coat the flare surface with
alkylbenzene oil (HAB).
Do not use mineral oil.
3. INSTALLING BRACKETS
Install the brackets with nuts, washers and spring washers.
Bracket (Left)
Drilling position
for anchor bolt
Installation
template
Ceiling
Bracket (Right)
Wall
Spring
washer
Bracket
Drilling position Special nut
for piping
4. INSTALLING INDOOR UNIT
Top
Reset the hex bolts as shown in the figure.
Rear
(Install the drain hose in this direction.)
Hex bolt
Right
Indoor unit 8 to 13 mm
Hole
(5/16" to 1/2")
Apply the indoor unit to the brackets.
VIEW
CAUTION
Bracket
Bolt
Indoor unit
Now, securely tighten the hex bolts in both sides.
5. INSTALLING THE DRAIN HOSE
Wall
Select whether the drain hose will be connected to the left or right side.
Insert the drain hose into the drain pan, then secure the drain hose with a
nylon fastener.
6 mm (1/4") Wrap the insulation (drain hose) around the drain hose connection.
Be sure to arrange the drain hose so that it is leveled lower than the drain
hose connecting port of the indoor unit.
Outdoor side
Remove the hole cover.
Drain hose
Arrange the drain hose
lower than this portion.
Good Bad
When drain hose is arranged backward.
Secure the drain hose with the VT wire.
ø 12.7 mm (1/2")
Base (Bottom)
VT wire
VT wire
hole
Intake grille
Drain hose
Pass the drain hose
Cut the grille
through here.
4
Flare nut tightening torque
BARRIER AND RFM BASE
Tightening torque
REMOVAL
14 to 18 N·m (140 to 180 kgf·cm)
33 to 42 N·m (330 to 420 kgf·cm) BARRIER AND RFM BASE REMOVAL
AND INSTALLATION
50 to 62 N·m (500 to 620 kgf·cm)
63 to 77 N·m (630 to 770 kgf·cm)
(1) Remove the barriers by removing the 4 fixing screws (2 screws each).
(2) Remove the RFM base by removing the 2 fixing screws and unhooking
100 to 110 N·m (1,000 to 1,100 kgf·cm)
the 1 hook.
(3) After completing the work, install the barriers and RFM base as they
were originally.
CAUTION
Fixing screw
(2 positions)
Barrier
Indoor unit
Fixing screw
(2 positions) RFM base
Install the barriers in the correct direction.
Coupler heat
insulator (small)
Be sure to overlap
the insulation
Large pipe Small pipe
No gap
Coupler heat
insulation
(Continued to the next page)