Hitachi RPI-4.0FSN4E - RPIM - Ducted Indoor Unit (0.8-1.5)FSN4 E(-DU)

3 Piping work and
refrigerant charge
118
SMGB0077 rev.0 - 01/2013
3.5.9 RPIM - Ducted indoor unit (0.8-1.5)FSN4E(-DU)

Refrigerant pipe installation
The pipe connections are inside the unit. Access the refrigerant
pipe connection by removing the fan cover on the unit.
Pipe connection
Lower panel
Electrical box
The correct position for the refrigerant pipe connection is shown below.
Models Gas pipe mm (inches) Liquid pipe mm (inches)
RPIM(0.8–1.5)FSN4E Ø12.70 (1/2) Ø6.35 (1/4)
N O T E
When installing the pipes, leave enough space for maintenance work in the electrical box of the unit.

Drain pipe installation
Drain hose installation:
1 Insert the drain hose in the clamp “A”.
2 Push the drain hose towards the boss until it reaches the end
of the pan.
3 Tighten the screw on the wire clamp to secure the pipe around
the drain connection without causing water leaks.
4 Insulate the drain hose around the wire clamp to avoid
condensation.
5 Insert the drain pipe into the drain hose and secure it using the
wire clamp “B”.
Clamp B
Drain pipe
Clamp A
Insulation
Drain pipe
Drainage