Hitachi RAC-25WXEN, Service Manual, Page: 8 / 52

The refrigerating machine oil is
easily affected by moisture. Use
caution to prevent water from
entering the cycle.
The difference in height between
the indoor and outdoor unit
should be kept below 10m.
The connecting pipe, no matter
big or small, should all be
insulated with insulation pipe and
then wrapped with vinyl tape.
(The insulator will deteriorate if
it is not wrapped with tape).
The connection of insulated drain
hose.
Inner diameter 16mm
Please use insulated drain hose for
the indoor piping (commercial
product)
Maximum pipe length 30m Minimum pipe length 3m
Figure showing the installation of lndoor and Outdoor unit
MODEL RAC-50WXEN
above 200mm
above
200mm
give clearance
as wide as
possible
above 300mm
above 700mm
above 150mm
8