Hitachi SET FREE Serie Manual De Instrucciones página 15

TRANSPORT, LIFTING AND HANDLING OF THE UNITS
!
D A N G E R
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.
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 Allowable Pressure and High Pressure Cut-out Value:
Refrigerant
R410A
?
N O T E
The label indicating compliance with the directive on pressure equipment,
the vessel category and capacity is located on the vessel itself.
Location of high pressure switch
High pressure switch
Acuumulator
5 TRANSPORT, LIFTING AND HANDLING OF THE UNITS
5.1 TRANSPORT OF OUTDOOR UNIT
B
When transporting the unit, make sure that it is securely and
correctly fastened to the vehicle to avoid damage. To avoid
damage, use appropriate textile slings -A- and cardboard
protection -B- to ensure that the unit is immobilised without
damaging it.
Use a suitable crane with the required loading capacity on flat
ground when loading and unloading the unit.
5 PMML0392B rev.1 - 07/2016
Maximun Allowable Pressure (MPa)
4.15
Compressor
A
C
!
D A N G E R
Do not handle, modify or change the high pressure switch in the
air conditioning unit. If abnormally high pressure is applied to the
elements in the air conditioning unit refrigerant cycle, including the
high pressure vessels, these could explode resulting in serious
injury or loss of life.
High Pressure Switch Cut-out Value (MPa)
4.00 ~ 4.10
?
N O T E
The high pressure switch is marked on the electric circuit diagrams of the
outdoor unit as PSH and is connected to the printed circuit board PCB1
of the unit.
Structure of High Pressure switch
Contact point
Connected to the electrical switch
!
C A U T I O N
Do not place other material on top of the outdoor units during transport
and storage.
If the unit is not installed immediately, it should be stored in a
suitable location, protected from the elements, especially in
saline atmospheres and from rodents. The unit must be stored
with all the transport protection with which it was supplied and
with the wooden base -C- fitted.
Pressure detected