System Description; Transportation And Handling - Hitachi Ras-2Hvnp Installations- Und Betriebshandbuch

5

1 System description

N O T E
The label for the vessel under PED are attached on the high pres-
sure vessel. The pressure vessel capacity and vessel category
are indicated on the vessel.
Location of High Pressure Switch
5 SYSTEM DESCRIPTION
• Long piping for high-rise buildings.
• Various combinations of indoor units type, capacity from 2.0kW to 8.0kW.
• Flexibility of indoor unit control.
• High reliability.
• Space saving.
• Easy installation.
Maximum piping length Lo-i:
Actual length
-
Equivalent length
-
Maximum height difference Ho-i:
Outdoor unit is higher than indoor unit
-
Indoor unit is higher than outdoor unit
-
N O T E
RCI-FSN3 (High efficiency – 4 step fan speed) indoor unit can connect in 1 indoor unit combination only. For use in 2 indoor units
combination, please contact your Hitachi dealer or service contractor.

6 TRANSPORTATION AND HANDLING

When hanging the unit, ensure a balance of the unit, check safety
and lift it up smoothly.
Do not remove any packing materials.
Hang the unit under packing condition with two ropes.
For safety reasons ensure that the outdoor unit is lifted smoothly
and does not lean.
Unit Gross Weight
Model
RAS-(2-2.5)HVNP
RAS-3HVNC
RAS-3HVRNS3
14
Compressor
(kg)
46
49
49
PMML0248A
N O T E
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
Connected to the electrical wire
D A N G E R
• Do not change the high-pressure switch locally or chan-
ge 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.
50
70
30
20
Pressure detected
Center of
1
gravity
515 mm 180 mm