Daikin Quaternity H-Series, Engineeiring Data

EDUS04-906_b

Installation Manual

Room Air Conditioners H-Series

21

• Do not change the setting of the protection devices. If 

the pressure switch, thermal switch, or other 
protection device is shorted and operated forcibly, or 
parts other than those specified by Daikin are used, 
fire or explosion may occur.

• Do not touch the switch with wet fingers. Touching a 

switch with wet fingers can cause electric shock.

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

prevent injury.

• Do not touch the refrigerant pipes during and 

immediately after operation as the refrigerant pipes 
may be hot or cold, depending on the condition of the 
refrigerant flowing 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 

piping may result in water leakage and property 
damage. 

• Insulate piping to prevent condensation.

• Be careful when transporting the product.

• Do not turn off the power immediately after stopping 

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

• Do not use a charging cylinder. Using a charging 

cylinder may cause the refrigerant to deteriorate.

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

dry, and tight. 

 (a) Clean and Dry -- Foreign materials (including 

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

 (b) Tight -- R-410A does not contain any chlorine, 

does 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 

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

• Remote controller (wireless kit) transmitting distance 

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

• Indoor units are for indoor installation only. Outdoor 

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 

following locations:
(a) Where a mineral oil mist or oil spray or vapor is 

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

(b) Where corrosive gas, such as sulfurous acid gas, is 

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

(c) Near machinery emitting electromagnetic waves.       

Electromagnetic waves may disturb the operation of 
the control system and cause the unit to 
malfunction.

(d) Where flammable gas may leak, where there is 

carbon fiber, or ignitable dust suspension in the air, 
or where volatile flammables such as thinner or 
gasoline are handled. Operating the unit in such 
conditions can cause a fire.

• Take adequate measures to prevent the outside unit 

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

• Install the power supply and control wires for the indoor 

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

• Dismantling the unit, treatment of the refrigerant, oil 

and 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 

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

• If the conventional refrigerant and refrigerator oil are 

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

• This air conditioner or heat pump is an appliance that 

should not be accessible to the general public.

• As design pressure is 478 psi, the wall thickness of 

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