Indoor Installation - Mitsubishi Electric PFAV-P250VM-E Data Book

2. Indoor Installation

(1) Requirement on installation site
1. In the way that the supply air is evenly distributed throughout the room,
2. In a place where the intruding air does not affect the unit's performance,
3. In a place where the flow of supply or return air is not obstructed,
4. In a place where airborne flammable oil droplets or steam are not present,
5. In a place where the risk of flammable gas leakage, migration, and/or accumulation is absent,
6. In a place where no high-frequency emitting devices are used,
7. In the way that the sensor of a fire alarm is not located on the supply air outlet side.
(Heated supply air may trigger a false alarm during heating operation.)
8. Do not install the unit in a place where acid solutions are frequently used.
9. Do not install the unit in a place where special chemical sprays (e.g., sulfuric gas) are used.
10. Do not install the unit in a place where corrosive gas or organic solvents are present.
11. In an environment high in oil mist, formic acid that is generated from a mixture of oil and drain water
can corrode the copper pipe and seriously shorten its life.
12. Corrosive gasses (e.g., sulfuric gas) that are generated in a place where food items are processed
and/or stored can damage the indoor unit and seriously shorten its life.
<Caution>
• If the units are operated for a long time at the dew point temperature of 23˚C[73˚F] or more, condensate
may collect and drip from the indoor units. If the units are operated under such conditions, cover the
entire surface of all indoor units with insulating materials with a thickness of between 10 mm[7/16 in.]
and 20 mm[13/16 in.] to prevent condensate from collecting.
• Indoor units that are installed in a machine room and connected to an adjacent room with a duct may
collect condensate if the temperature and humidity in the machine room rise high enough. If this
situation happens, circulate the air in the machine room and in the adjacent room to lower the
temperature and humidity in the machine room.
• If the unit is installed in a room with good airtightness, negative pressure may be created in the room,
which can hold the door shut. Create an air passage to prevent negative pressure from developing in the
room.
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