Product Specification; Precautions For Using R410A Refrigerant; Installation Tools; Accessories - Fujitsu 9384203007-04 Manuel D'installation

• The fi rst 36 in (915 mm) of supply air plenum and ductwork must be constructed of
sheet metal as required by NFPA 90B. The supply air plenum or duct must have a
solid sheet metal bottom directly under the unit with no openings, registers or fl exible
air ducts located in it. If fl exible supply air ducts are used they may be located only in
the vertical walls of a rectangular plenum, a minimum of 6 in (152 mm) from the solid
bottom. Metal plenum or duct may be connected to the combustible fl oor base, if not, it
must be connected to the unit supply duct fl anges such that combustible fl oor or other
combustible material is not exposed to the supply air opening from the downfl ow unit.
Exposing combustible (non-metal) material to the supply opening of a downfl ow unit
can cause a fi re resulting in property damage, personal injury or death.
Exceptions to downfl ow warnings:
• Installations on concrete fl oor slab with supply air plenum and ductwork completely
encased in not less than 2 in (51 mm) of concrete (See NFPA 90B).
• Unit must be reconfi gured for vertical down or horizontal right supply air discharge
applications. The coil must be repositioned so the vertical drainpan is on the bottom
for vertical down discharge applications or the horizontal drip pan is below coil for
horizontal right discharge applications. Failure to reconfi gure the unit for these applica-
tions can result in property damage and poor system performance.
• In compliance with recognized codes, an auxiliary drain pan must be installed under
all equipment containing evaporator coils that are located in any area of a structure
where damage to the building or building contents may occur as a result of an over-
fl ow of the coil drain pan or a stoppage in the primary condensate drain piping.
NOTE:
When used in cooling applications, excessive sweating may occur when unit is installed in
an unconditioned space. This can result in property damage.
NOTE:
Improper installation, or installation not made in accordance with the Underwriters Labora-
tory (UL) certifi cation or these instructions, can result in unsatisfactory operation and/or
dangerous conditions and are not covered by the unit warranty.
NOTE:
Use of this air-handler during construction is not recommended. If operation during construc-
tion is absolutely required, the following temporary installation requirements must be
followed: Installation must comply with all Installation Instructions in this manual including
the following items:
• Properly sized power supply and circuit breaker/fuse
• Air-handler operating under thermostatic control;
• Return air duct sealed to the air-handler;
• Air fi lters must be in place;
• Correct air-fl ow setting for application
• Removing the coil and storing it in a clean safe place is highly recommended until con-
struction is completed and the outdoor unit is installed.
• Clean air-handler, duct work, and components including coil upon completion of the
construction process and verify proper air-handler operating conditions according as
stated in this instruction manual.
• Electric strip heater elements tend to emit a burning odor for a few days if dust has accu-
mulated during construction. Heater elements are easily damaged. Take great care when
cleaning them. Low pressure compressed air is recommended for cleaning elements.
• Carbon Monoxide (CO) Poisoning Can Cause Severe Injury or Death.
• Carbon Monoxide from the exhaust of motor vehicles and other fuel burning devices
can be drawn into the living space by the operation of the central heating and air
conditioning system.
• Exhaust from motor vehicles, generators, garden tractors, mowers, portable heat-
ers, charcoal and gas grills, gasoline powered tools, and outdoor camping equipment
contains carbon monoxide, a poisonous gas that can kill you. You cannot see it, smell
it, or taste it.
• Do NOT operate an automobile or any engine in a garage for more than the few
seconds it takes to enter or exit the garage.
• Do NOT operate any fuel-burning device in an enclosed or partly enclosed space, or
near building windows, doors or air intakes.
• The U.S. Consumer Product Safety Commission (CPSC) and Health Canada recom-
mend the installation of UL or CSA certifi ed Carbon Monoxide Alarm(s) in every home.
9384203007-04.indb 3 9384203007-04.indb 3
WARNING
CAUTION
CAUTION
WARNING

2. PRODUCT SPECIFICATION

2. 1. Precautions for using R410A refrigerant

• The basic installation work procedures are the same as conventional refrigerant
(R22) models.
However, pay careful attention to the following points:
• Since the working pressure is 1.6 times higher than that of conventional refriger-
ant (R22) models, some of the piping and installation and service tools are special.
(Refer to the following table.)
Especially, when replacing a conventional refrigerant (R22) model with a new refriger-
ant R410A model, always replace the conventional piping and fl are nuts with the
R410A piping and fl are nuts.
• Models that use refrigerant R410A have a diff erent charging port thread diameter to
prevent erroneous charging with conventional refrigerant (R22) and for safety. There-
fore, check beforehand. [The charging port thread diameter for R410A is 1/2-20 UNF.]
• 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 open-
ing by pinching, taping, etc.
• 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 where refriger-
ant composition is stable.

2. 2. Installation tools

Tool name
Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,
Gauge manifold the diameter of each port has been changed.
It is recommended to use gauge with seals -30 inHg to 768
psi (-0.1 to 5.3 MPa) for high pressure.
-30 inHg to 551 psi (-0.1 to 3.8 MPa) for low pressure.
To increase pressure resistance, the hose material and base
Charge hose
size were changed.
A conventional vacuum pump can be used by installing a
Vacuum pump
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 0.004 oz/100 ft (40 mg/10 m). Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the expansion
value or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is neces-
sary to choose adequate materials.
WARNING
• Do not use the existing (for R22) piping and fl are nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise
and cause failure, injury, etc. (Use the special R410A materials.)
• Use (refi ll or replace with) specifi ed refrigerant (R410A) only. Use of unspecifi ed refrig-
erant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specifi ed refrigerant (R410A). Infl ow of air or
application of unspecifi ed material makes the internal pressure of the refrigerant cycle
too high, and may cause product malfunction, burst of piping, or injury.

2. 3. Accessories

WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or other
prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit falling,
water leakage, electric shock, or fi re.
• The following installation parts are furnished. Use them as required.
• Keep the Installation Manual in a safe place and do not discard any other accessories
until the installation work has been completed.
Name and Shape
Operating Manual
Installation Manual
(indoor unit)
Coupler heat insulation (large)
Coupler heat insulation (small)
Contents of change
Q'ty Description
1
1 (This book)
For indoor side pipe joint
1
(gas pipe)
For indoor side pipe joint
1
(liquid pipe)
En-3
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