Hitachi RAC-18WSPA, Service Manual

Page: 7 / 101

Figure showing the installation of lndoor and Outdoor unit
MODEL RAK-18PSPA/RAC-18WSPA
above
50mm
above 50mm
above 50mm
t
u
o
b
a
300mm
a
tu
ob
0.45m
must
t
o
n
bend
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the insulator is
insufficient, please use commercial
products.)
s The refrigerating machine oil is
easily affected by moisture. Use
caution to prevent water from
entering the cycle.
s The difference in height between
the indoor and outdoor unit
should be kept below 10m.
s
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)
above 100mm
above 200mm
above 50mm
give clearance
as wide as
possible
above
200mm
Be sure to
completely
seal any gap
with putty.
above 50 mm when
installed on the
ceiling of balcony
above 200mm
2,300 mm or more
Maximum pipe length 20m Minimum pipe length 5m
RAK-25PSPA/RAC-25WSPA
RAK-35PSPA/RAC-35WSPA
(Procure locally)
Plug
plug