Hitachi RAS-3FSVNE Betriebshandbuch Seite 23

11.2. SUSPENSION OF REFRIGERANT PIPING
Suspend the refrigerant piping at certain points and prevent
the refrigerant piping from touching the weak part of the
building such as wall, ceiling, etc...
(If touched, abnormal sound may occur due to the vibration
of the piping. Pay special attention in case of short piping
length).
1~15m
Indoor Unit
11.3. PIPING CONNECTION FOR OUTDOOR UNIT
1. 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.
Nº Description
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

REFRIGERANT PIPING & REFRIGERANT CHARGE
Do not fix the refrigerant piping directly with the metal
fittings (The refrigerant piping may expand and contract).
Some examples for suspension method are shown below.
For Suspending
Fire-Proff
Section
Treatment
2. Mount the piping cover in order to avoid water entering
into the unit. Seal the holes where pipes and wires are
inserted, by using the insulator and rubber bushes as
shown below.
3. If the field-supplied piping is connected with stop valves
directly, it is recommended use a tube bender.
For Suspending
heavles along the wall
Ruber Bush (Accessory)
Add cross cutting to the center of the eubber
bushing.
Attach Ruber Bushing to the hole for wiring.
In case that conduit tube is used, rubber
Piping Cover bush is not necessary.
Gas Pipe
Power Source and
Operating Wiring
Liquid Pipe
Insulation (Accessory)
Attach insulation to the pipe as shown in the
figure and space shall not exist at the piping
hole.
Cut insulation as shown in the figure when
attaching work is difficult.
11
15
For Instant
Installation work