Hitachi UTOPIA RAS-4HVRP2E - Control and Safety Devices

5 Control System
Control and safety devices
SMGB0136 rev.0 - 07/2021
93
5
5.4 Control and safety devices
1 Compressor protection: the compressor is protected by High Pressure switch, this switch stops the compressor when
the discharge pressure exceeds the set value.
2 Oil heater: this band-type heater protects against the formation of foam on the oil during cold starts and remains
enabled when the compressor is at a standstill.
Model RAS-3HVRC2
For Compressor
Pressure switches
Automatic reset, non-adjustable (Each one
for each compressor)
High
Cut-out
MPa
-0.05
4.15
-0.15
Cut-in 3.20±0.15
Low Cut-out
MPa
2.85±0.1
(For control) Cut-in 3.6±0.15
Fuse capacity on PCB (PF1) 1~ 230V 50Hz A 25
CCP timer - Non adjustable
Setting time min 3
For fan module
Fuse capacity
On PCB (PF4) (for fan motor) A 15
On PCB (EFR1) (for control circuit) A 3
Model RAS-(4-6)HV(R/N)(C/P)2E RAS-(4-6)H(R/N)(C/P)2E
For Compressor
Pressure switches
Automatic restart, non adjustable (each one for each
compressor)
High pressure
Cut-Out MPa 4.15
-0.05
-0.15
4.15
-0.05
-0.15
Cut-In MPa 3.20
+0.15
-0.20
3.20
+0.15
-0.20
Fuse capacity
1~ 230V 50Hz A 50 -
3N~ 400V 50Hz A - 32
Oil heater capacity W 24 24
CCP timer - Not adjustable
Time setting min. 3 3
For fan module
Fuse capacity (for both fans)
DC 310V A 3.15 5
3N~ 400V 50Hz A - -