Refrigerant Charge - Hitachi RAS-4FSNME1 Instruction Manual

REFRIGERANT CHARGE

C Multi-kit after the first CH-Box or cooling only section (2
pipes section)
Total indoor unit HP
<12
12-15.6
E Header branch for 2 pipes section
Total indoor unit HP Nº of header branches
4-10
F Header branch for 3 pipes section
Total indoor unit HP Nº of header branches
2-8
9 REFRIGERANT CHARGE
!
D A N G E R
Do not charge OXYGEN, ACETYLENE, or other flammable and
poisonous gases into the refrigerant because an explosion can
occur. It is recommended that oxygen free nitrogen be charged for
these types of tests cycle when performing a leakage test or an
airtight test. These types of gases are extremely dangerous.
9.1 CAUTION OF THE PRESSURE BY CHECK JOINT

RAS-(4-6)FS(V)NME1
When the pressure is measured,
use the check joint of gas stop
valve (A), and use the check joint
(B). Connect the pressure gauge
according to the following table
because of high pressure side
and low pressure side changes by
operation mode.
A For gas stop valve
B For piping
For liquid stop valve
C
21 PMML0532 rev.1 - 12/2020
Model
E-102SN4
(*1) E-162SN4
E-162SN4
(*1) E-242SN3
Model
8 MH-108XN
Model
4 MH-84AN1
Cooling Heating
Low pressure High pressure
High pressure Low pressure
Exclusive for vacuum pump and
refrigerant charge
4-10
G CH-Box
CH-Box model Branch
CH-AP160SSX 1
CH-AP280SSX 1
CH-AP04MSSX 4
CH-AP08MSSX 8
CH-AP12MSSX 12
CH-AP16MSSX 16
?
N O T E
(*) Up to two 8.0, 10.0HP type indoor units can be connected to the CH-Box
within the "Indoor unit maximum connection capacity". Make sure to
increase the pipe connection size by using the appropriate accessory pipe.
!
C A U T I O N
Charge the correct refrigerant quantity according to the description of
label at the inside of service cover. Overcharging or insufficient charging
could cause a compressor failure.

RAS-(8-12)FSXNME1
B
To measure the pressure use the
check joints (A) and (B). Connect
C
the pressure gauge according to
the following table.
A
Cooling/ Heating
For piping High pressure
A
B For piping Low pressure
?
N O T E
For all models, be careful that refrigerant and oil do not splash to the
electrical parts at removing the charge hoses.
8 MH-108AN
IU maximum
Nº of
connection capacity
connectable
for 1 branch
IU per branch
(HP)
(HP)
7 ≤6.0
8 ≤10.0 ≤10.0
6 ≤16.0 ≤6.0 (*)
6 ≤30.0 ≤6.0 (*)
6 ≤30.0 ≤6.0 (*)
6 ≤30.0 ≤6.0 (*)
A
B
≤6.0