Before Getting Installed; Before Getting Installed (Moved) - Electrical Work; Before Starting The Test Run; Indoor Unit Accessories - Mitsubishi Electric CITY MULTI PFFY-P20VCM-E Installation Manual

• Use refrigerant piping made of C1220 (Cu-DHP) phosphorus deoxidized
copper as specified in the JIS H3300 "Copper and copper alloy seamless
pipes and tubes". In addition, be sure that the inner and outer surfaces of
the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shav-
ing particles, oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause the refrigerant
residual oil to deteriorate.
• Store the piping to be used during installation indoors and keep both ends
of the piping sealed until just before brazing. (Store elbows and other
joints in a plastic bag.)
- If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and
compressor trouble may result.
• Use liquid refrigerant to fill the system.
- If gas refrigerant is used to seal the system, the composition of the refrigerant in
the cylinder will change and performance may drop.
• Do not use a refrigerant other than R410A.
- If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may
cause the refrigerator oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve.
- The vacuum pump oil may flow back into the refrigerant cycle and cause the
refrigerator oil to deteriorate.
• Do not use the following tools that are used with conventional refriger-
ants.
(Gauge manifold, charge hose, gas leak detector, reverse flow check
valve, refrigerant charge base, vacuum gauge, refrigerant recovery equip-
ment)
- If the conventional refrigerant and refrigerator oil are mixed in the R410A, the
refrigerant may deteriorated.
- If water is mixed in the R410A, the refrigerator oil may deteriorate.
- Since R410A does not contain any chlorine, gas leak detectors for conventional
refrigerants will not react to it.
• Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deterio-
rate.

1.3. Before getting installed

Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
• Do not use the air conditioner where food, pets, plants, precision instru-
ments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the
air conditioner or damage its parts.
• When installing the unit in a hospital, communication station, or similar
place, provide sufficient protection against noise.
- The inverter equipment, private power generator, high-frequency medical
equipment, or radio communication equipment may cause the air conditioner to
operate erroneously, or fail to operate. On the other hand, the air conditioner
may affect such equipment by creating noise that disturbs medical treatment or
image broadcasting.
• Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80% or when the drain pipe is clogged, con-
densation may drip from the indoor unit. Perform collective drainage work
together with the outdoor unit, as required.

2. Indoor unit accessories

The unit is provided with the following accessories:
Part No. Accessories
1 Tie band
2 Drain hose
3 Washer

3. Selecting an installation site

• Select a site with sturdy fixed surface sufficiently durable against the weight of
unit.
• Before installing unit, the routing to carry in unit to the installation site should be
determined.
• Select a site where the unit is not affected by entering air.
• Select a site where the flow of supply and return air is not blocked.
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1.4. Before getting installed (moved) - electrical work

Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or tele-
phone ground lines. Improper grounding may result in electric shock.
• Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and cause a fire.
• Install an leak circuit breaker, as required.
- If an leak circuit breaker is not installed, electric shock may result.
• Use power line cables of sufficient current carrying capacity and rating.
- Cables that are too small may leak, generate heat, and cause a fire.
• Use only a circuit breaker and fuse of the specified capacity.
- A fuse or circuit breaker of a larger capacity or a steel or copper wire may result
in a general unit failure or fire.
• Do not wash the air conditioner units.
- Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause personal injury or
property damage.
• Install the drain piping according to this Installation Manual to ensure
proper drainage. Wrap thermal insulation around the pipes to prevent con-
densation.
- Improper drain piping may cause water leakage and damage to furniture and
other possessions.
• Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than 20 kg.
- Some products use PP bands for packaging. Do not use any PP bands for a
means of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so may cut your fingers.
- When transporting the outdoor unit, suspend it at the specified positions on the
unit base. Also support the outdoor unit at four points so that it cannot slip side-
ways.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts, may cause
stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that children will not play
with them. If children play with a plastic bag which was not torn apart, they face
the risk of suffocation.

1.5. Before starting the test run

Caution:
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result
in severe damage to internal parts. Keep the power switch turned on during the
operational season.
• Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can cause electric shock.
• Do not touch the refrigerant pipes during and immediately after operation.
- During and immediately after operation, the refrigerant pipes are 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 operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
• 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.
Qty Part No.
3 4 Leg
1 5 Screw
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• Select a site where refrigerant piping can easily be led to the outside.
• Select a site which allows the supply air to be distributed fully in room.
• Do not install unit at a site with oil splashing or steam in much quantity.
• Do not install unit at a site where combustible gas may generate, flow in, stag-
nate or leak.
• Do not install unit at a site where equipment generating high frequency waves
(a high frequency wave welder for example) is provided.
Accessories Qty
2
6