Mitsubishi Electric PUZ-WZ50VAA Service Manual page 16

2-3. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by
rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
2-4. Choosing the outdoor unit installation location
Correct
Correct
Fig. 2-1
OCH816
○ R290 is heavier than air—as well as other refrigerants—so tends to
Correct
• Select a location from which noise emitted by the unit will not incon-
Incorrect
• Select a location permitting easy wiring and pipe access to the power
• Avoid locations where combustible gases may leak, be produced,
flow, or accumulate.
• Note that water may drain from the unit during operation.
• Select a level location that can bear the weight and vibration of the
• 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 malfunc-
tion may result.
• Avoid locations exposed to oil, steam, or sulfuric gas.
• Use the transportation handles of the outdoor unit to transport the
• Refrigerant pipes connection shall be accessible for maintenance
○ Install outdoor units in a place where at least one of the four sides is
• Define a protective zone close around the unit according to section
accumulate at the base (in the vicinity of the floor). If R290 accumu-
lates around base, it may reach a flammable concentration in case
room is small. To avoid ignition, maintaining a safe work environment
is required by ensuring appropriate ventilation. If a refrigerant leak is
confirmed in a room or an area where there is insufficient ventilation,
refrain from using of flames until the work environment can be
improved by ensuring appropriate ventilation.
venience neighbors.
source and indoor unit.
unit.
unit. If the unit is carried from the bottom, hands or fingers may be
pinched.
purposes.
open, and in a sufficiently large space without depressions. (Fig. 2-1)
"2-6. Protective zone".
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