Hitachi RCI Serie Manual De Instalación Y Funcionamiento página 14

IMPORTANT NOTICE
2
DANGER:
Pressure Vessel and Safety Device: This air
-
conditioner is equipped with a high pressure vessel
under PED (Pressure Equipment Directive). The
pressure vessel has been designed and tested before
shipment according to PED. Also, in order to prevent
the system from an abnormal pressure, a high
pressure switch, which needs no field adjustment, is
utilized in the refrigeration system.
Therefore, this air conditioner is protected from
abnormal pressures. However, if abnormally high
pressure is applied to the refrigeration cycle including
the high pressure vessel(s), it will result in serious
injury or death due to explosion of the pressure
vessel. Do not apply a pressure higher than the
following pressure to the system, by modifying or
changing the high pressure switch.
Maximum Allowable Pressure and High Pressure Cut-out Value:
-
Product Series
HRNM Series
NOTE:
The label for the vessel under PED are attached on
the high pressure vessel. The pressure vessel
capacity and vessel category are indicated on the
vessel.
Location of High Pressure Switch
Compressor
DANGER:
Do not change the high-pressure switch locally or change the high pressure cut-out set value locally. If changed, it will
-
cause serious injury or death due to explosion.
Do not attempt to turn service valve rod beyond its stop
-
Outdoor Unit
Refrigerant
Model
RAS-8~12HRNM R410A
Connected to the
electrical wire
Start-up and Operation: Check to ensure that all the
-
stop valves are fully opened and no obstacle exists at
the inlet/outlet sides before start-up and during the
operation.
Maintenance: Periodically check the high pressure
-
side pressure. If the pressure is higher than the
maximum allowable pressure, stop the system and
clean the heat exchanger or remove the cause.
Maximum High Pressure
Allowable Switch Cut-out
Pressure (MPa)
4.15
NOTE:
The high pressure switch is indicated on the electrical
wiring diagram in the outdoor unit as "PSH"
connected to printed circuit board (PCB1) in the
outdoor unit.
Structure of High Pressure Switch
Contact Point
Value (MPa)
4.00 ~ 4.10
Pressure Detected