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• VRV Systems • Outdoor Units
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• Outdoor Units • HEAT PUMP • RWEYQ-MY1
10
Installation of outdoor units
10 - 1 Safety considerations
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1
Ground the air conditioner.
Do not connect the ground wire to gas or water pipes, lightning rod or a telephone ground wire.
Incomplete grounding may result in electric shocks.
2
Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric shocks.
3
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.
4
Install the indoor and outside units, power supply wiring and connecting wiring at least 1 meter away from televisions or radios in order to prevent
image interference or noise.
(Depending on the radio waves, a distance of 1 meter may not be sufficient enough to eliminate the noise.)
5
Remote controller (wireless kit) transmitting distance can result shorter than expected in rooms with electronic fluorescent lamps.
(inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as possible.
6
Install in a machine room that has no water drops.
This unit is for indoor use.
7
Do not install the air conditioner in the following locations:
a
where a mineral oil mist or an 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 result in a malfunction of the unit.
d
where flammable gas may leak, where there are carbon fiber or ignitable dust suspensions in the air, or where volatile flammables such as
thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, oil and eventual other parts, should be done in accordance with the relevant local and national
regulations.
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The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight.
1Clean and dry
Foreign materials (including mineral oils such as SUNISO oil or moisture) should be prevented from getting mixed into the system.
2Tight
R410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce the earth’s protection against harmful ultraviolet
radiation.
R410A 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 the chapter “REFRIGERANT PIPING” carefully and follow these procedures correctly.
Since design pressure is 4.0MPa or 40bar (for R407C units: 3.3MPa or 33bar),the wall thickness of pipes should be more carefully selected.
Since R410A 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 R410A. See the catalog for indoor unit models which can be connected.
(Normal operation is not possible when connected to other units.)
