6
GB
•
Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is shorted or
operated forcibly, or parts other than those specified by Mitsubishi Electric are
used, fire or explosion may result.
•
To dispose of this product, consult your dealer.
•
The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- Choose the appropriate wire size and the switch capacities for the main power
supply described in this manual if local regulations are not available.
•
Pay special attention to the place of installation, such as basement, etc.
where refrigeration gas can accumulate, since refrigerant is heavier than
the air.
•
This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction con-
cerning use of the appliance by a person responsible for their safety.
•
Children should be supervised to ensure that they do not play with the
appliance.
1.2. Precautions for devices that use R410A
refrigerant
Caution:
•
Do not use existing refrigerant piping.
- The old refrigerant and refrigerant oil in the existing piping contains a large
amount of chlorine which may cause the refrigerant oil of the new unit to dete-
riorate.
- R410A is a high-pressure refrigerant and can cause the existing piping to burst.
•
Use refrigerant piping made of phosphorus deoxidized 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, shaving particles, oils, moisture, or any other contami-
nant.
- 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 failure may result.
•
Apply a small amount of ester oil, ether oil, or alkyl benzene to flares. (for
indoor unit)
- Infiltration of a large amount of mineral oil may cause the refrigerant oil to dete-
riorate.
•
Use liquid refrigerant to fill the system.
- If gas refrigerant is used to fill 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 mixed with R410A, the chlorine in the refrig-
erant may cause the refrigerant 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
refrigerant oil to deteriorate.
•
Do not use the following tools that are used with conventional refrigerants.
(Gauge manifold, charge hose, gas leak detector, reverse flow check valve,
refrigerant charge base, refrigerant recovery equipment)
- If the conventional refrigerant and refrigerant oil are mixed in the R410A, the
refrigerant may deteriorate.
- If water is mixed in the R410A, the refrigerant oil may deteriorate.
- Since R410A does not contain any chlorine, gas leak detectors for conven-
tional refrigerants will not react to it.
•
Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
•
Do not use antioxidant or leak-detection additive.
•
Be especially careful when managing the tools.
- If dust, dirt, or water gets into the refrigerant cycle, the refrigerant may deterio-
rate.
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 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.
- 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 treatment 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, con-
densation may drip from the indoor unit or BC controller. Perform collective
drainage work together with the outdoor unit, as required.
1.4. Before installation (relocation) - electri-
cal 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 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 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 con-
densation.
- Improper drain piping may cause water leakage causing 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 20 kg.
- Some products use PP bands for packaging. Do not use any PP bands as a
means of transportation. It is dangerous.
•
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.
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.
•
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 refriger-
ant piping, compressor, and other refrigerant cycle parts. Your hands may suf-
fer 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, drain-
age water leakage or mechanical failure of sensitive parts may occur.
WT06421X02.book Page 6 Wednesday, April 25, 2012 8:43 AM
