Daikin RXYMQ48MVJU [11/31] Caution
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Daikin RXYMQ48MVJU [11/31] Caution

Daikin RXYMQ48MVJU [11/31] Caution
Installation EDUS39-606A-N
10 Installation of Outdoor Units
• Before touching electrical parts, turn off the power.
• When installing or relocating the system, be sure to
keep the refrigerant circuit free from substances
other than the specified refrigerant (R-410A) such as
air.
Any presence of air or other foreign substance in the
refrigerant circuit causes an abnormal pressure rise or
rupture, resulting in injury.
• Do not reconstruct or change the settings of the pro-
tection 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 result.
• Placing a flower vase or other containers with water
or other liquids on the unit could result in a shock
hazard or fire if a spill occurs.
• Do not touch the switch with wet fingers.
Touching a switch with wet fingers can cause electric
shock.
• Be sure to install a ground leakage breaker.
Failure to install a ground leakage breaker may result in
electric shocks, or fire.
• Heat exchanger fins are sharp enough to cut.
To avoid injury wear glove or cover the fins when working
around them.
• Do not touch the air outlet or horizontal blades while
the swing flap is in operation because fingers can
get caught and injured.
• Do not allow children to play on or around the unit as
they could be injured.
• Refrigerant pipes may be very hot or very cold dur-
ing or immediately after operation.
Touching them could result in burns or frostbite. To avoid
injury give the pipes time to return to normal temperature
or, if you must touch them, be sure to wear proper gloves.
• While following the instructions in this installation manual,
install drain piping in order to ensure proper drainage and
insulate piping in order to prevent condensation.
Improper drain piping may result in water leakage and
property damage.
• Be very careful about product transportation.
• Do not touch the refrigerant pipes during and imme-
diately after operation.
During and immediately after operation, the refrigerant
pipes may be hot and may be 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.
• Do not remove the front panel because some parts
inside are dangerous to touch. In addition, some
parts may be damaged by touching them. For check
-
ing and adjust internal parts, contact your dealer.
• Do not turn off the power immediately after stopping
operation.
Always wait at least five minutes before turning off the
power. Otherwise, water leakage and trouble may occur.
• Do not use a charging cylinder.
Using a charging cylinder may cause the refrigerant to
deteriorate.
• The refrigerant R-410A requires strict cautions for
keeping the system clean, dry and tight.
A. Clean and dry
Foreign materials (including mineral oils such as
SUNISO oil or moisture) should be prevented from get
-
ting mixed into the system.
B. Tight
CAUTION
R-410A does not contain any chlorine, does not destroy
the ozone layer, and does not reduce the earth’s protec-
tion against harmful ultraviolet radiation.
R-410A can contribute slightly to the greenhouse effect if
it is released. Therefore we should take special attention
to check the tightness of the installation.
Read Section 6, REFRIGERANT PIPING WORK care-
fully and follow these procedures correctly.
• Since R-410A is a mixed refrigerant, the required
additional refrigerant must be charged in its liquid
state. (If the refrigerant is charged in a state of gas,
its composition changes and the system will not
work properly.)
The indoor unit is for R-410A. See the catalog for indoor
unit models which can be connected.
(Normal operation is not possible when connected to other
units.)
• For installation of the indoor units, refer to the instal-
lation manual supplied together with each indoor
unit.
• Check the unit stand for damage on a continuous
basis, especially if it has been in use a long time. If
left in a damaged condition, the unit may fall and
cause injury.
• Never operate the air conditioner with the discharge
pipe thermistor (R3T), suction pipe thermistor (R2T)
and pressure sensors (S1NPH, S1NPL) removed.
Such operation may burn out the compressor.
• Make sure to provide for adequate measures in order
to prevent that the outdoor unit be used as a shelter
by small animals.
Small animals making contact with electrical parts can
cause malfunctions, smoke or fire. Please instruct the cus-
tomer to keep the area around the unit clean.
NOTE
• Install the indoor and outdoor units, power supply wiring
and transmission wiring at least 3.5 ft. away from televi
-
sions or radios in order to prevent image interference or
noise.
Depending on the radio waves, a distance of 3.5ft. may not
be enough to eliminate the noise.
• Dismantling of the unit, treatment of the refrigerant, oil
and eventual other parts, should be done in accor-
dance with the relevant local and national regulations.
• Do not use the following tools that are used with con-
ventional refrigerants: Gauge manifold, charge hose,
gas leak detector, reverse flow check valve, refrigerant
charge base, vacuum gauge, refrigerant recovery
equipment.

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