Hitachi RPI-4.0FSN4E - RPI - Ducted Indoor Unit (2.0-6.0)FSN4 E

3 Piping work and
refrigerant charge
114
SMGB0077 rev.0 - 01/2013
Prepare a polyvinyl chloride (PVC) pipe with an outer diameter of
32 mm.
Fasten the tubing to the drain hose with an adhesive and the
factory-supplied clamp. The drain piping must be performed with a
down-slope pitch of 1/25 to 1/100.
Insulate the drain pipe after connecting the drain hose.
NOTE
If the relative humidity of the inlet air or the ambient air
exceeds 80% in the place where the unit is installed, t an
auxiliarydrainpan(eld-supplied)belowtheindoorunit,as
indicatedinthegure.
Indoor unit
Auxiliary drain pan
(field-supplied)
3.5.7 RPI - Ducted indoor unit (2.0-6.0)FSN4E

Refrigerant pipe installation
The correct position for the refrigerant pipe connection is shown below.
RPI-(2.0-6.0) RPI-(8.0/10.0)
1
2
3
4
1
2
4
3
1 Gas pipe
2 Liquid pipe
3 Drain hose
4 Electrical box