Hitachi RAS-4FSN3E Manuel D'utilisation page 18

REFRIGERANT PIPING & REFRIGERANT CHARGE
8.2 PIPING CONNECTION FOR OUTDOOR UNIT
1 To open/close the service cover:
• Remove the screws following the instructions to the above
figure.
• Slowly press down the cover.
?
N O T E
Hold the cover with a hand to remove screws as the cover may fall down.
Hook (three places): two fans
2 Confirm that the valve is closed.
3 Prepare a field-supplied bend pipe for liquid line. Connect
it to the liquid valve by flare nut through the square hole of
bottom base.
4 For Gas Piping Connection.
Prepare a field-supplied bend pipe for gas line. Braze it and
the factory-supplied pipe flange at the outside of the unit.
5 The pipes can be connected from 4 directions. Make holes
in the piping cover or cabinet for taking out pipes. Take the
piping cover away from the unit, and make holes by cutting
along the guideline at the rear of the cover or punching
with a driver. Remove the burr with a cutter, and place a
insulation (field supplied) to protect cables and pipes.
Nº
 Rear side piping work
 Pipe Cover

Right side piping work

Bottom side piping work (Knock out hole)
 Front side piping work
 Piping work

Stop Valve
 Removing Direction for Service Cover
8 PMML0389B rev.1 - 07/2016
Service cover
Description
a. For the front and side piping
To use racking or conduit tubes, check the size and
remove part following the slit.
?
N O T E
Place insulation (field supplied) to protect cables and pipes from
being damaged by plate edges.
b. For the downward piping
Cables
Liquid piping
?
N O T E
Cables shall not contact directly to the pipes.
c. For the rear side piping
?
N O T E
Remove the rear pipe cover under the rear cover and remove
part following the slit.
Front piping hole
Side piping hole
Gas piping
Knock-out hole
Bottom base
Rear Cover