System description5
NOTE
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
Compressor
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
Pressure detected
Connected to the electrical wire
DANGER
• 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.
5 SYSTEM DESCRIPTION
• Long piping for high-rise buildings.
• Various combinations of indoor units type.
• Flexibility of indoor unit control.
• High reliability.
• Space saving.
• Easy installation.
Maximum piping length Lo-i:
- Actual length
- Equivalent length
50
70
Maximum height difference Ho-i:
- Outdoor unit is higher than indoor unit
- Indoor unit is higher than outdoor unit
30
20
NOTE
RCI-FSN3 (High efciency – 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.
Model
Unit Gross Weight
(kg)
RAS-(2-2.5)HVNP1 48
RAS-3HVNC1 49
RAS-3HVRNS3 49
1
515 mm
180 mm
275 mm
Center of
gravity
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