Mitsubishi Electric Mr.SLIM PUZ-ZMDA Serie Manuel D'installation page 4

1. Safety precautions
Warning:
○
Pipe-work shall be protected from physical damage.
• The installation of pipe-work shall be kept to a minimum.
• Compliance with national gas regulations shall be observed.
• Keep any required ventilation openings clear of obstruction.
○
Do not use low temperature solder alloy in case of brazing the refrigerant pipes.
○
When performing brazing work, be sure to ventilate the room sufficiently.
Make sure that there are no hazardous or flammable materials nearby.
When performing the work in a closed room, small room, or similar location, make
sure that there are no refrigerant leaks before performing the work.
If refrigerant leaks and accumulates, it may ignite or poisonous gases may be
released.
1.1. Before installation
Caution:
• Do not use the unit in an unusual environment. If the air conditioner is installed in
areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas
exposed to high salt content such as the seaside, or areas where the unit will be
covered by snow, the performance can be significantly reduced and the internal
parts can be damaged.
• D o not install the unit where combustible gases may leak, be produced, flow, or
accumulate. If combustible gas accumulates around the unit, fire or explosion
may result.
1.2. Before installation (relocation)
en
Caution:
• B e extremely careful when transporting or installing the units. Two or more per-
sons are needed to handle the unit, as it weighs 20 kg or more. Do not grasp the
packaging bands. Wear protective gloves to remove the unit from the packaging
and to move it, as you can injure your hands on the fins or the edge of other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials, such
as nails and other metal or wooden parts may cause stabs or other injuries.
1.3. Before electric work
Caution:
• B e sure to install circuit breakers. If not installed, electric shock may result.
• F or the power lines, use standard cables of sufficient capacity. Otherwise, a short
circuit, overheating, or fire may result.
• W hen installing the power lines, do not apply tension to the cables. If the con-
nections are loosened, the cables can snap or break and overheating or fire may
result.
1.4. Before starting the test run
Caution:
• T urn on the main power switch more than 12 hours before starting operation.
Starting operation just after turning on the power switch can severely damage
the internal parts. Keep the main power switch turned on during the operation
season.
• Before starting operation, check that all panels, guards and other protective parts
are correctly installed. Rotating, hot, or high voltage parts can cause injuries.
1.5. Using R32 refrigerant air conditioners
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. (Refer to 4.1.) 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. (Refer to 4.1.)
• 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 packag-
ing.) 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.
2
○
The appliance shall be stored in a well-ventilated area where the room size cor-
responds to the room area as specified for operation.
○
Keep gas-burning appliances, electric heaters, and other fire sources (ignition
sources) away from the location where installation, repair, and other air condi-
tioner work will be performed.
If refrigerant comes into contact with a flame, poisonous gases will be released.
○
Do not smoke during work and transportation.
• Do not perform pump down work when there is a gas leak. The intake of air or
other gases causes abnormally high pressure in the refrigeration cycle, which
may cause explosion or injury.
• The outdoor unit produces condensation during the heating operation. Make
sure to provide drainage around the outdoor unit if such condensation is likely to
cause damage.
• W hen installing the unit in a hospital or communications office, be prepared for
noise and electronic interference. Inverters, home appliances, high-frequency
medical equipment, and radio communications equipment can cause the air con-
ditioner to malfunction or breakdown. The air conditioner may also affect medical
equipment, disturbing medical care, and communications equipment, harming
the screen display quality.
• T he base and attachments of the outdoor unit must be periodically checked for
looseness, cracks or other damage. If such defects are left uncorrected, the unit
may fall down and cause damage or injuries.
• D o not clean the air conditioner unit with water. Electric shock may result.
• T ighten all flare nuts to specification using a torque wrench. If tightened too
much, the flare nut can break after an extended period and refrigerant can leak
out.
• B e sure to ground the unit. Do not connect the ground wire to gas or water pipes,
lightning rods, or telephone grounding lines. If the unit is not properly grounded,
electric shock may result.
• U se circuit breakers (ground fault interrupter, isolating switch (+B fuse), and
molded case circuit breaker) with the specified capacity. If the circuit breaker
capacity is larger than the specified capacity, breakdown or fire may result.
• D o not touch any switch with wet hands. Electric shock may result.
• D o not touch the refrigerant pipes with bare hands during operation. The refriger-
ant pipes are hot or cold depending on the condition of the flowing refrigerant. If
you touch the pipes, burns or frostbite may result.
• A fter stopping operation, be sure to wait at least five minutes before turning off
the main power switch. Otherwise, water leakage or breakdown may result.
• Servicing shall be performed only as recommended by the manufacturer.
• Do not use refrigerant other than R32 refrigerant.
• Use the following tools specifically designed for use with R32 refrigerant.
The following tools are necessary to use R32 refrigerant. Contact your nearest
dealer for any questions.
Tools (for R32)
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.
Flare tool
Size adjustment gauge
Vacuum pump adapter
Electronic refrigerant charging scale