Hitachi RAS-(4-6)HVRNS2E - Protection and Safety Control for IVX Series; Compressor Protection; Safety and Control Device Setting for the Outdoor Units

5 Control System
126
SMGB0064 rev.0 - 08/2011
5.3 Protection and safety control
5.3.1 Protection and safety control for IVX Series
Compressor protection
The following devices and their combinations protect the compressor
High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
Oil heater
This band heater protects against the oil carry-over during the cold starting, as the band heater is
energized while the compressor is stopped.
Fan motor protection
Internal thermostat that is embedded in the fan motor winding: this internal thermostat cuts out the
operation of the fan motor when the temperature of the fan motor winding exceeds the setting.
Safety and control device setting for the outdoor units
RAS-(3-6)H(V)RNM2E
Model RAS-3HVRNM2E RAS-4H(V)RNM2E RAS-5H(V)RNM2E RAS-6H(V)RNM2E
For compressor
High pressure switch Cut-out
MPa
4.15
–0.05
–0.15
Cut-in 3.20±0.15
For control
Fuse
A1φ 230V, 50Hz 40 40 50 50
3φ 400V, 50Hz 2X20 2X20 2X20
CCP timer
setting time
min
Non adjustable
3
For condenser fan
motor
°C Automatic reset, non-adjustable (each one for each motor)
Internal thermostat Cut-out
For control circuit
Fuse capacity on PCB
A 5
RAS-(8-12)HRNM
Model RAS-8HRNM RAS-10HRNM RAS-12HRNM
For compressor Automatic reset, non-adjustable (each one for each compressor)
High pressure switch Cut-out
MPa
4.15
–0.05
–0.15
Cut-in 3.20±15
For control
Fuse
A
3 φ400V, 50Hz 40
CCP timer
setting time
min
Non adjustable
3
For condenser fan motor
Automatic reset, non-adjustable
(each one for each compressor)
Internal thermostat
DC
Cut-out
°C
120±5
Cut-out 120±5
AC Cut-in 96±15
For control circuit
Fuse capacity on PCB 1.5
A
5
Fuse capacity on PCB 3 10