Fujitsu AG * V09LAC Series Service Instruction page 83

SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION MANUAL
(PART No. 9316421028-01)
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:
(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant (R22) models,
some of the piping and installation and service tools are special.(See the table below.)
Especially, when replacing a conventional refrigerant (R22) 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 (R22) and for safety. Therefore, check
beforehand.[The charging port thread diameter for R410A is 1/2 threads per inch.]
(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant
(R22) models. Also, when storing the piping ,securely seal the opening 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
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 (-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) 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 amount of residual oil is less than 40 mg/10m. Do not
use copper pipes having a collapsed, deformed or discolored
portion (especially on the interior surface). Otherwise, the ex-
pansion value or capillary tube may become blocked with
contaminants.
As an air conditioner using R410A incurs pressure higher than
when using R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table1.Never us copper pipes thinner than 0.8mm even
when it is available on the market.
(1) Do not use the existing (for R22) piping and flare nuts.
• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury,
etc.(Use the special R410A materials.)
(2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A)
to enter the refrigerant cycle.
• If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value
and cause breakage, injury, etc.
When installing pipes shorter than 3m, sound of the outdoor unit will be transferred to the indoor unit, which will
cause large operating sound or some abnormal sound.
(V09LA)
(V12LA)
Contents of change
Table 1 Thicknesses of Annealed Copper Pipes
Thickness (mm)
Nominal Outer diameter
R410A
diameter (mm)
1/4 6.35 0.80
3/8 9.52 0.80
WARNING
CAUTION
For authorized service personnel only.
(1) For the room air conditioner to operate satisfactory, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This
installation manual describes the correct connections using the standard accessories and the parts specified in this
installation manual.
(3) Have installation work done by authorized service personnel only.
(4) Do not use an extension cord.
(5) Do not turn on the power until all installation work is complete.
G Be careful not to scratch the air conditioner when handling it.
G After installation, explain correct operation to the customer, using the operating manual.
G Let the customer keep this installation manual because it is used when the air conditioner is serviced or moved.
G The maximum length of the piping is 20 m. The maximum height difference of the piping is 15 m,
if the units are further apart than these, correct operation can not be guaranteed.
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 trouble.
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.
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.
SELECTING THE MOUNTING
POSITION
Decide the mounting position with the customer as follows:
(1) If possible, do not install the unit where it will be exposed to direct sunlight.
(If necessary, install a blind that does not interfere with the air flow.)
(2) Do not install the unit where a strong wind blows or where it is very dusty.
(3) Do not install the unit where people pass.
(4) Take your neighbors into consideration so that they are not dis-
[ref.] R22
turbed by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 2 so that the air flow is not blocked.
0.80
Also for efficient operation, leave open three of the four directions
front, rear, and both sides.
0.80
WARNING
Install at a place that can withstand the weight of the
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) In places where the outdoor temperature drops to 0˚C or
lower, the drain water may freeze and may stop up the drain
or cause other outdoor unit trouble. Therefore take meas-
ures so that the drain water will not freeze and clog the drain.
(4) In the area with heavy snowfall, if the intake and outlet of
outdoor unit is blocked with snow, it might become difficult
to get warm and it is likely to cause of the breakdown. Please
construct a canopy and a pedestal or place the unit on a high
stand (local configured).
(5) If children under 10 years old may approach the unit, take
preventive measures so that they cannot reach the unit.
WARNING
ACCESSORY
Fig. 1
Drain pipe
Tapping screw
Rear hooks
Front hooks
Connector cover
INSTALLATION DIAGRAM OF
OUTDOOR UNIT
Fig. 2
INDOOR UNIT
Connection Cord
Conform to Type245 IEC57
[OUTDOOR UNIT]
10 cm or over
60 cm or over
10 cm or over
20 cm or over
5 cm or over
54 cm
Drain hose
Installation instruction on the back.
Q'ty
1
25 cm or
over
Outdoor
unit bottom