Mitsubishi Electric PUZ-WZ50VAA Service Manual page 18

2-6. Protective zone
CAUTION:
The unit contains R290 refrigerant which is highly flammable. Great care must be taken when installing and servicing the unit
which must be installed/serviced by a competent electrician, with the requisite professional qualifications to install this unit in your
jurisdiction. In the event of a refrigerant leak, the installer and/or person in possession of the unit must ensure that no person
is endangered outdoors or in adjacent buildings and no refrigerant has the potential to travel from the unit into the building and
drainage systems. If you are concerned about a possible refrigerant leak from your unit, please contact your installer/supplier
immediately or contact Mitsubishi Electric in your region directly for more information.
A protective zone must be maintained around the area closest to the unit. See shaded in Fig. 2-2.
WARNING:
• There must not be any building openings, entrance to the basement, grooves or entrance into the waste-water system. (such
as windows, doors, ventilation openings or similar opening, flat-roof windows, light shafts, subsidence or depressions in the
ground, pump shafts, inlets in sewers and waste water shafts, downpipes etc.)
• The protective zone must not extend to adjacent buildings or public traffic areas. (such as property boundaries or neighboring
properties, footpaths and driveways)
• Ignition sources must not be present in the protective zone, either permanently or for a short period of time. (such as open
flame, electrical systems, sockets, lamps, light switches, electrical house connections, sparking tools, objects with high surface
temperatures of 370°C or higher)
Protective zone
OCH816
Fig. 2-2
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