Hitachi FSG Série Manuel D'installation page 19

12.2. 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).
1~1.5m
1m 1m 1m
Indoor Unit
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.
12.3. REFRIGERANT PIPING WORK FOR OUTDOOR UNIT
DANGER:
Use refrigerant R410A (For RAS-5~30FSN(E),
RAS8~30FXN(E) in the refrigerant cycle. Do not
charge oxygen, acetylene or other flammable and
poisonous gases into the refrigerant cycle when
performing a leakage test or an air-tight test. These
types of gases are extremely dangerous and can
cause an explosion. It is recommended that
compressed air, nitrogen or refrigerant be used for
these types of tests.
Piping Materials
1. Prepare field-supplied copper pipes.
2. Select the piping size from the table in pages 16.
2. Select clean copper pipes. Make sure there is no dust
and moisture inside. Blow the inside of the pipes with
nitrogen or dry air, to remove any dust or foreign
materials before connecting pipes.
NOTE:
-
For connecting Ø19.05 pipe to RAS-8FXN(E) unit, use
the pipe flange (factory-supplied).
-
For connecting Ø22.2 pipe to RAS-10FSN(E)/FXN(E)
unit, use the pipe flange (factory-supplied).
-
For connecting Ø25.4 pipe to RAS-24FXN
unit, use the pipe flange (factory-supplied).
-
For connecting Ø28.6 pipe to RAS-16FSN/FXN unit, use
the pipe flange (factory-supplied).
-
For connecting Ø28.6 pipe to RAS-20-24FSN/
RAS-20~30FXN unit, use the pipe flange (factory-
supplied).
-
For connecting Ø31.75 pipe to RAS-30FSN/FXN unit,
use the pipe flange (factory-supplied)
For suspending
Heavies
There are two Kinds of surface treatment such as; standard
chromatin and ceramic coating treatment (*)
*Ceramic Coating Coating Treatment with triple strong
coating on the iron material surface, and has the following
Fire-Proof
characters.
Section
1. Corrosion Resistance: Superior in adhesion and
Treatment
corrosion resistance due to triple coating
2. Weather Resistance and Heat Resistance: Strong
resistance due to ultra-violet rays and solar heat due to
ceramic coating
3. Surface Hardness: Superior in excoriation resistance
due to high hardness of the surface
RAS-8FXN(E)
RAS-16FSN
RAS-30FXN
RAS-24FXN
REFRIGERANT PIPING
15
For Piping Along For Instant
The Wall Installation Work
RAS-10FSN(E)/10FXN(E)
RAS-16FXN/20FXN
RAS-20/24FSN
RAS-16/20/24FXN
RAS-30FSN/FXN