Hitachi RAS-70YH7 Service Manual page 7

Figure showing the installation of Indoor and Outdoor unit
– 6 –
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the
insulator is insuffi cient, please
use commercial products).
The difference in height
●
between the indoor and
outdoor unit should be kept
max 20m.
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.
Please use insulated drain
hose for the indoor piping
(commercial product).