Before Starting The Test Run; Installation Location - Mitsubishi Electric P25 Installationshandbuch

1. Safety precautions
1.2. Before installation (relocation)
Caution:
• Be extremely careful when transporting the units. Two or more persons 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 pack-
aging and to move it, as you can injure your hands on the fins or 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.
• Thermal insulation of the drainpipe is necessary to prevent condensation. If
the drainpipe is not properly insulated, condensation will be formed and the
ceiling, floor, or important items may be damaged.
1.3. Before electric work
Caution:
• Be sure to install circuit breakers. If not installed, electric shock may result.
• For the power lines, use standard cables of sufficient capacity. Otherwise, a
short circuit, overheating, or fire may result.
• When installing the power lines, do not apply tension to the cables. If the
connections are loosened, the cables can snap or break and overheating or
fire may result.

1.4. Before starting the test run

Caution:
• Turn on the main power switch more than 12 hours before starting operation.
Starting operation just after turning on the power switch can severely dam-
age the internal parts. Keep the main power switch turned on during the op-
eration 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.
• Do not operate the air conditioner without the air filter set in place. If the air
filter is not installed, dust may accumulate and breakdown may result.

2. Installation location

D
B
Fig. 2-1
C
Fig. 2-2
A
E
C
D
W
H
A
B
• Install the drainpipe according to this Installation Manual to ensure proper
drainage. Place thermal insulation on the pipes to prevent condensation. If
the drainpipe is installed incorrectly, water leakage and damage to the ceil-
ing, floor, furniture, or other possessions may result.
• The 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.
• Do not clean the air conditioner unit with water. Electric shock may result.
• Tighten 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.
• Be sure to ground the unit. Do not connect the ground wire to gas or water
pipes, lighting rods, or telephone grounding lines. If the unit is not properly
grounded, electric shock may result.
• Use 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.
• Do not touch any switch with wet hands. Electric shock may result.
• Do not touch the refrigerant pipes with bare hands during operation. The
refrigerant pipes are hot or cold depending on the condition of the flowing
refrigerant. If you touch the pipes, burns or frostbite may result.
• After stopping operation, be sure to wait at least five minutes before turning
off the main power switch. Otherwise, water leakage or breakdown may re-
sult.
2.1. Refrigerant pipe (Fig. 2-1)
s Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe are
within the limits shown below.
A Pipe length
Models
(one way)
P25 max. 30 m
P35, 50 max. 40 m
P60-140 max. 50 m
• Height difference limitations are binding regardless of which unit, indoor or outdoor,
is positioned higher.
D Indoor unit
E Outdoor unit
2.2. Choosing the outdoor unit installation location
• Avoid locations exposed to direct sunlight or other sources of heat.
• Select a location from which noise emitted by the unit will not inconvenience
neighbors.
• Select a location permitting easy wiring and pipe access to the power source and
indoor unit.
• Avoid locations where combustible gases may leak, be produced, flow, or accumu-
late.
• Note that water may drain from the unit during operation.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit can be covered by snow. In areas where heavy snow
fall is anticipated, special precautions such as raising the installation location or
installing a hood on the air intake must be taken to prevent the snow from blocking
the air intake or blowing directly against it. This can reduce the airflow and a mal-
function may result.
• Avoid locations exposed to oil, steam, or sulfuric gas.
• Use the transportation handles of the outdoor unit to transport the unit. If the unit is
carried from the bottom, hands or fingers may be pinched.
2.3. Outline dimensions (Outdoor unit) (Fig. 2-2)
Models W D
P25, 35 900 330+20
P50-71 900 330+20
P100 900 330+20
P125, 140 1050 330+20
B Height C Number of
difference bends (one way)
max. 30 m max. 9
max. 40 m max. 12
max. 50 m max. 15
(mm)
H A B C
650 500 200 370
855 500 200 370
1260 500 200 370
1260 600 225 370
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