Daikin FXTQ12PAVJU, Installation Manual

English 

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It is recommended to install a ground fault circuit inter-

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rupter if one is not already available. This helps prevent 
electrical shocks or fi re.

Securely fasten the outside unit terminal cover (panel). 

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If the terminal cover/panel is not installed properly, dust 
or water may enter the outside unit causing fi re or 
electric shock.

When installing or relocating the system, keep the 

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refrigerant circuit free from substances other than the 
specifi ed refrigerant (R-410A) such as air. Any presence 
of air or other foreign substance in the refrigerant cir-
cuit can cause an abnormal pressure rise or rupture, 
resulting in injury.

Do not change the setting of the protection devices. If 

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the pressure switch, thermal switch, or other protection 
device is shorted and operated forcibly, or parts other 
than those specifi ed by Daikin are used, fi re or explo-
sion may occur.

 CAUTION

Do not touch the switch with wet fi ngers. Touching a 

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switch with wet fi ngers can cause electric shock.

Do not allow children to play on or around the unit to 

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prevent injury.

Do not touch the refrigerant pipes during and immedi-

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ately after operation as the refrigerant pipes may be hot 
or cold, depending on the condition of the refrigerant 
fl owing through the refrigerant piping, compressor, and 
other refrigerant cycle parts. Your hands may suffer 
burns or frostbite if you touch the refrigerant pipes. To 
avoid injury, give the pipes time to return to normal 
temperature or, if you must touch them, be sure to wear 
proper gloves.

Install drain piping to proper drainage. Improper drain 

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piping may result in water leakage and property damage.

Insulate piping to prevent condensation.

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Be careful when transporting the product.

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Do not turn off the power immediately after stopping 

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operation. Always wait for at least 5 minutes before turn-
ing off the power. Otherwise, water leakage may occur.

Do not use a charging cylinder. Using a charging cylin-

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der may cause the refrigerant to deteriorate.

Refrigerant R-410A in the system must be kept clean, 

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dry, and tight.

Clean and Dry -- Foreign materials (including min-

(a) 

eral oils such as SUNISO oil or moisture) should be 
prevented from getting into the system.

Tight -- R-410A does not contain any chlorine, does 

(b) 

not destroy the ozone layer, and does not reduce the 
earth’s protection again harmful ultraviolet radiation. 
R-410A can contribute to the greenhouse effect if it 
is released. Therefore take proper measures to 
check for the tightness of the refrigerant piping 
installation. Read the chapter Refrigerant Piping and 
follow the procedures.

Since R-410A is a blend, the required additional refriger-

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ant must be charged in its liquid state. If the refrigerant 
is charged in a state of gas, its composition can change 
and the system will not work properly.

The indoor unit is for R-410A. See the catalog for indoor 

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models that can be connected. Normal operation is not 
possible when connected to other units.

Remote controller (wireless kit) transmitting distance 

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can be shorter than expected in rooms with electronic 
fl uorescent lamps (inverter or rapid start types). Install 
the indoor unit far away from fl uorescent lamps as 
much as possible.

Indoor units are for indoor installation only. Outdoor 

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units can be installed either outdoors or indoors. This 
unit is for indoor use.

Do not install the air conditioner or heat pump in the 

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following locations:

Where a mineral oil mist or oil spray or vapor is 

(a) 

produced, for example, in a kitchen.
Plastic parts may deteriorate and fall off or result in 
water leakage.

Where corrosive gas, such as sulfurous acid gas, is 

(b) 

produced.
Corroding copper pipes or soldered parts may result 
in refrigerant leakage.

Near machinery emitting electromagnetic waves.

(c) 

Electromagnetic waves may disturb the operation of 
the control system and cause the unit to malfunc-
tion.

Where fl ammable gas may leak, where there is 

(d) 

carbon fi ber, or ignitable dust suspension in the air, 
or where volatile fl ammables such as thinner or 
gasoline are handled. Operating the unit in such 
conditions can cause a fi re.

Take adequate measures to prevent the outside unit 

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from being used as a shelter by small animals. Small 
animals making contact with electrical parts can cause 
malfunctions, smoke, or fi re. Instruct the customer to 
keep the area around the unit clean.

 NOTE

Install the power supply and control wires for the indoor 

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and outdoor units at least 3.5 feet away from televisions 
or radios to prevent image interference or noise. De-
pending on the radio waves, a distance of 3.5 feet may 
not be suffi cient to eliminate the noise.

Dismantling the unit, treatment of the refrigerant, oil and 

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additional parts must be done in accordance with the 
relevant local, state, and national regulations.

Do not use the following tools that are used with con-

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ventional refrigerants: gauge manifold, charge hose, 
gas leak detector, reverse fl ow check valve, refrigerant 
charge base, vacuum gauge, or refrigerant recovery 
equipment.

If the conventional refrigerant and refrigerator oil are 

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mixed in R-410A, the refrigerant may deteriorate.

This air conditioner or heat pump is an appliance that 

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should not be accessible to the general public.

As design pressure is 450 psi, the wall thickness of 

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fi eld-installed pipes should be selected in accordance 
with the relevant local, state, and national regulations.