Mitsubishi HMA100V Technical Manual page 6

・Locations with heavy snow. (If installed, be sure to provide base flame and snow hood mentioned in the manual)
・Locations where the unit is exposed to chimney smoke.
・Locations at high altitude. (more than 1000m high)
・Locations with ammonic atmospheres.
・Locations where heat radiation from other heat source can affect the unit.
・Locations without good air circulation.
・Locations with any obstacles which can prevent inlet and outlet air of the unit.
・Locations where short circuit of air can occur. (in case of multiple units installation)
・Locations where strong air blows against the air outlet of outdoor unit.
It can cause remarkable decrease in performance, corrosion and damage of components, malfunction and fire.
l Do not install the outdoor unit in the locations listed below.
・Locations where discharged hot air or operating sound of the outdoor unit can bother neighborhood.
・Locations where outlet air of the outdoor unit blows directly to plants.
・Locations where vibration can be amplified and transmitted due to insufficient strength of structure.
・Locations where vibration and operation sound generated by the outdoor unit can affect seriously. (on the wall or at the
place near bed room)
・Locations where an equipment affected by high harmonics is placed. (TV set or radio receiver is placed within 5m)
・Locations where drainage cannot run off safely.
It can affect surrounding environment and cause a claim.
l Do not install the remote controller at the direct sunlight.
It can cause malfunction or deformation of the remote controller.
l Do not use the unit for special purposes such as storing foods, cooling precision instruments and preservation of animals,
plants or art.
It can cause the damage of the items.
l Take care when carrying the unit by hand.
If the unit weights more than 20kg, it must be carried by two or more persons. Do not carry by the plastic straps, always use
the carry handle when carrying the unit by hand. Use gloves to minimize the risk of cuts by the aluminum fins.
l Dispose of any packing materials correctly.
Any remaining packing materials can cause personal injury as it contains nails and wood. And to avoid danger of suffocation, be
sure to keep the plastic wrapper away from children and to dispose after tear it up.
l Pay attention not to damage the drain pan by weld spatter when welding work is done near the indoor unit.
If weld spatter entered into the indoor unit during welding work, it can cause pin-hole in drain pan and result in water leakage.
To prevent such damage, keep the indoor unit in its packing or cover it.
l Be sure to insulate the refrigerant pipes so as not to condense the ambient air moisture on them.
Insufficient insulation can cause condensation, which can lead to moisture damage on the ceiling, floor, furniture and any other
valuables.
l Be sure to perform air tightness test by pressurizing with nitrogen gas after completed refrigerant piping work.
If the density of refrigerant exceeds the limit in the event of refrigerant leakage in the small room, lack of oxygen can occur,
which can cause serious accidents.
l Do not touch any buttons with wet hands.
It can cause electric shocks.
l Do not shut off the power supply immediately after stopping the operation.
Wait at least 5 minutes, otherwise there is a risk of water leakage or breakdown.
l Do not control the system with main power switch.
It can cause fire or water leakage. In addition, the fan can start unexpectedly, which can cause personal injury.
l Do not touch any refrigerant pipes with your hands when the system is in operation.
During operation the refrigerant pipes become extremely hot or extremely cold depending the operating condition, and it can
cause burn injury or frost injury.
l Only use R410A refrigerant. R410A is the refrigerant whose pressure is 1.6 times as high as that of conventional refrigerant.
l The size of charging port of service valve and check joint for R410A are altered from that for conventional refrigerant in order
to prevent the system being charged with the incorrect refrigerant by mistake. And the protruding dimension of pipe for flare
processing and flare nut size for R410A are also altered from that for conventional refrigerant in order to reinforce strength
against the pressure for R410A. Accordingly the dedicated tools for R410A listed in the below mentioned table should be
prepared for installation and servicing.
l Do not use charging cylinder. Using charging cylinder may alter the composition of refrigerant, which results in making the
performance of the system worse.
l Refrigerant must be charged always in liquid state from the bottle.
Notabilia for units designed for R410A
Dedicated tools for R410A
a) Gauge manifold
b) Charge hose
c) Electronic scale for refrigerant charge
d) Torque wrench
e) Flare tool
f) Protrusion control gauge for copper pipe
g) Vacuum pump adapter
h) Gas leak detector
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'10 • HM-T-149