Hitachi RCI-1.0FSN3 Service Manual page 129

3 Piping work and
refrigerant charge
NOTE
When installing the pipes, leave enough space for maintenance work in the electrical box of the unit.
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Drain pipe installation
For condense draining, prepare a polyvinyl chloride pipe with a Ø25mm (outer diameter).
Fasten the field supplied pipe to the drain hose with adhesive.
The drain piping should be perfomed with a down-slope pitch of 1/25 to 1/100.
Connect a syphon, as shown at the figure below.
NOTE
Keep Electrical Box and Drain Pipe connection free of refrigerant pipes.
C A U T I O N
It is very important the syphon installation in order to guarantee the proper condensate draining.
NOTE
If the relative humidity of the inlet air or the ambient air
exceeds 80% in the place where the unit is installed, fit an
auxiliary drain pan (field-supplied) below the indoor unit, as
indicated in the figure.
117
SMGB0077 rev.0 - 01/2013
>75 mm
Slope 2%
Plug
Indoor unit
Auxiliary drain pan
(field-supplied)
3