Hitachi YUTAKI S Serie Manuel D'installation page 28

10.3. REFRIGERANT CHARGING QUANTITY
■ Outdoor unit factory refrigerant charge before shipment:
10.4. CAUTION OF THE PRESSURE BY CHECK JOINT
When the pressure is measured, use the check joint of gas stop
valve ((A) in the figure below) and use the check joint of liquid
piping ((B) in the figure below).
At that time, connect the pressure gauge according to the
following table because of high pressure side and low pressure
side changes by operation mode.
Cooling Operation
Check joint for gas stop
valve "A"
Check joint for piping "B"
Check joint for Liquid
valve "B"
30
PMML0215A rev.1 - 02/2012
O/U MODEL
RAS-8.0HRNME-AF
RAS-10.0HRNME-AF
Heating Operation
Low pressure High pressure
High pressure Low pressure
Exclussive for Vacuum Pump and
refrigerant charge
Wo (Kg)
7.3
7.8

NOTE:
Be careful that refrigerant and oil do not splash to the
electrical parts at removing the charge hoses.
PIPING AND
REFRIGERANT CHARGE
When the cap is removed, obscure
sound may be heard because the
gas trapped at O-ring thread face is
released.
However, this is not gas leakage.