Installing Dryer In Liquid Line - Hitachi FSG1 Series Technical Catalogue

REFRIGERANT PIPING AND REFRIGERANT CHARGE
13
/32
- In case of gas piping connection from bottom, connect
the field-supplied pipe to the flange pipe (Factory-
supplied)
Factory-Supplied
Factory-Supplied
Pipe Flange
Pipe Flange
Factory-supplied
Elbow Pipe
Reducer
Field-Supplied
Reducer
Pipe Flange
(Piping connection
from Front or Rear)
§ Remove the flange and the gasket attached to the unit
before shipping, and attach the new gasket (factory-
supplied) before connecting the pipe flange to the gas valve.
Gas Valve
Gasket
(To remove)
Flange
(To remove)
Factory-Supplied
Pipe Flange
Field-Supplied Bend Pipe
?
NOTE:
- Attach the gasket after soldering the pipes.
- Do not place the gasket between flanges.
- Connect the pipe flange to the gas valve after
soldering the field-supplied bend pipe and the flange
pipe.
- Check to ensure that no pressure increase is observed
one hour after vacuum pumping completion.
Field-Supplied
Pipe Flange
(Piping connection
from Bottom)
Gasket
(Factory-Supplied)

13.5.5. INSTALLING DRYER IN LIQUID LINE

The refrigeration oil for the G series outdoor units easily
absorbs moisture. Therefore, it is required to perform
sufficient vacuum pumping and to use a dryer in the liquid
line, in order to remove moisture in the field-supplied piping.
The following dryer Kits are selected to keep moisture lower
than 100 ppm when the moisture level is 200 ppm with the
maximum refrigerant charge before installing. If the actual
moisture level is higher than 200 ppm, charge the dryer
several times according to the level
Dryer Kit Model D-P6V
Dryer D-P6
Applicable 0.U.
RAS-8FSG, RAS-
RAS-5FSG
Model
A=380
B=70
Dryer
Thermal Insulator
for Dryer
Thermal Insulator
for Liquid Valve
Liquid Valve
Liquid Valve
3/8
Connection
Tape for Temporary
Use
D-P10V D-P20V D-P30V
D-P10 D-P20 D-P30
RAS-16FSG, RAS-24FSG1
RAS-20FSG RAS-30FSG1
10FSG
RAS-20FXG1 RAS-30FXG1
A=341 A=497 A=497
B=70 B=85 B=85
1/2 5/8 5/8
4 sheets