Before Installation (Relocation)Electrical Work; Before Starting The Test Run; About The Product - Mitsubishi Electric PUMY-P VKM Serie Installationshandbuch

1.2. Precautions for devices that use
R410A refrigerant
Caution:
• Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Make sure the insides of the
pipes are clean and do not contain any harmful contaminants such
as sulfuric compounds, oxidants, debris, or dust. Use pipes with the
specified thickness. Note the following if reusing existing pipes that
carried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
- Do not use thin pipes.
• Store the pipes to be used during installation indoors and keep both
ends of the pipes sealed until just before brazing. (Leave elbow
joints, etc. in their packaging.) If dust, debris, or moisture enters the
refrigerant lines, oil deterioration or compressor breakdown may
result.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the
refrigeration oil applied to the flared sections. If mineral oil is mixed in
the refrigeration oil, oil deterioration may result.
• Do not use refrigerant other than R410A refrigerant. If another
refrigerant is used, the chlorine will cause the oil to deteriorate.
• Use the following tools specifically designed for use with R410A
refrigerant. The following tools are necessary to use R410A refrigerant.
Contact your nearest dealer for any questions.
en
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
• B e sure to use the correct tools. If dust, debris, or moisture enters the
refrigerant lines, refrigeration oil deterioration may result.
• Do not use a charging cylinder. If a charging cylinder is used, the
composition of the refrigerant will change and the efficiency will be
lowered.
1.3. Before installation
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
instruments, 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.
- Inverter equipment, private power generator, high-frequency medical equip-
ment, 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 treat-
ment or image broadcasting.
• Do not install the unit on or over things that are subject to water
damage.
- When the room humidity exceeds 80% or when the drain pipe is clogged,
condensation may drip from the indoor unit. Perform collective drainage
work together with the outdoor unit, as required.
1.4. Before installation (relocation) -
electrical work
Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or
telephone ground lines. Improper grounding may result in electric shock.
2. About the product
• This unit uses R410A-type refrigerant.
• Piping for systems using R410A may be different from that for systems using
conventional refrigerant because the design pressure in systems using
R410A is higher. Refer to the Data Book for more information.
• Some of the tools and equipment used for installation with systems that use
other types of refrigerant cannot be used with the systems using R410A.
Refer to the Data Book for more information.
2
Tools (for R410A)
Flare tool
Size adjustment gauge
Vacuum pump adapter
Electronic refrigerant charging scale
• Never connect in reverse phases.
Never connect the Power Line L1, L2, and L3 to Terminal N.
- If the unit is miss wired, when power is supplied, some electrical parts will
be damaged.
• 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 a leak circuit breaker, as required.
- If a 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 the use of a substitute simple
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
condensation.
- Improper drain piping may cause water leakage and damage to furniture
and other possessions.
• Be very careful about transporting the product.
- One person should not carry the product. Its weight is in excess of 20kg.
- Some products use PP bands for packaging. Do not use any PP bands as
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, support it at the specified positions on
the unit base. Also support the outdoor unit at four points so that it cannot
slip sideways.
• 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 has not been torn
apart, they face the risk of suffocation.
• Be sure to install N-Line.
- Without N-Line, it could cause damage to the unit.
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 irreversible damage to internal parts. Keep the power switch turned
on during the operational season. Make sure of the phase order of power
supply and voltage between each phase.
• Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can result in an electric shock.
• Do not touch the refrigerant pipes during and immediately after
operation.
- During and immediately after operation, the refrigerant pipes may be hot
or 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 5 minutes before turning off the power. Otherwise,
drainage water leakage or mechanical failure of sensitive parts may occur.
• Do not touch the surface of the compressor during servicing.
Warning:
When installing the unit, securely connect the refrigerant pipes before
starting the compressor.
1.6. Test run
• Depending on the operating conditions, the outdoor unit fan may stop while
the compressor is operating, but this is not a malfunction.
Caution:
• Do not vent R410A into the atmosphere.