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MAINTENANCE
11
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11.12. SAFETY AND PROTECTION CONTROL
The safety and protective devices are equipped with the
unit to ensure dependable and long life operation.
! Compressor protection
1. Fuse and thermal relay equipped in the control box cut
out each compressor operation when the current to the
compressor exceeds the setting
2. The internal thermostat embedded in the motor winding
cuts out each operation, when the temperature exceeds
the setting
3. The oil heater in the compressor prevents from oil
foaming during cold starting. This heater warms the oil,
while the compressor is stopped
! Refrigeration Cycle
1. The high pressure switch and low pressure control
protect against excessive discharge pressure and
exceedingly low suction pressure. The switch and
control cut out compressor operation when discharge
pressure or suction pressure is abnormal.
Model
For Compressor
High Pressure Switch
Cut-Out
Low Pressure Switch
(Pressure Sensor)
Cut-Out
Internal Thermostat for
Compressor
Cut-Out
Cut- In
Compressor Motor
(380-415V/50Hz)
Fuse
Thermal Relay
Circuit Protector(Option)
Oil Heater
Capacity
Discharge Gas Thermostat
Cut-Out
Cut- In
CCP Timer
Setting Time
Star-Delta
Unloading during Starting
For Control Circuit
Fuse
Capacity
For Refrigerant Circuit
Pressure Relief Valve
Setting Pressure
Freeze Protection Thermostat
Cut-Out
Cut- In
Fan Motor ( 380-415V / 50Hz)
Fuse
Internal Thermostat
Cut-Out
Cut- In
Circuit Protector(Option)
RCUE-AG1
40
50
60
70
MPa
2,74
2,74
2,74
2,74
MPa
0,05
0,05
0,05
0,05
°C
115
115
115
115
°C
93
93
93
93
A
125
125
125
160
Manual Reset, Adjustable ( One Three-Phase Set for Each Compressor Motor )
A
54
65
70
90
Manual Reset, Adjustable ( One Three-Phase Set for Each Compressor Motor )
A
112
136
136
160
W
150
150
150
150
°C
140
140
140
140
°C
110
110
110
110
S
180
180
180
180
S
5
5
5
5
S
30
30
30
30
A
6
6
6
6
MPa
3,0
3,0
3,0
3,0
°C
2
2
2
2
°C
6
6
6
6
A
12
12
12
12
°C
135
135
135
135
°C
82
82
82
82
A
10
10
10
10
Their functions should be carefully noted, and field
adjustment is not recommended, if the setting is maintained
at the point listed in the table.
2. The pressure relief valve is equipped on discharge gas
line. When high pressure exceeds the setting, gas
refrigerant will be discharged to prevent abnormal high
pressure
! Condenser Fan Motor Protection
Fuse and internal thermostat are equipped
The internal thermostat embedded in fan motor winding
cut out fan operation and compressor operation, when
the temperature of the motor winding exceeds the
setting
! Water Cooler
Pump interlock, freeze protection thermostat, low
pressure control and suction gas thermostat can protect
water cooler against water cooler freezing
80
100
120
140
150
Manual Reset, Non-Adjustable ( One Switch for Each Compressor Motor )
2,74
2,74
2,74
2,74
2,74
Electronic Control
0,05
0,05
0,05
0,05
0,05
Manual Reset, Non-Adjustable ( One Switch for Each Compressor Motor )
115
115
115
115
115
93
93
93
93
93
125
125
125
160
125
54
65
70
90
65
112
136
136
160
136
One Heater for Each Compressor Motor
150
150
150
150
150
( One for Each Cycle )
140
140
140
140
140
110
110
110
110
110
Non-Adjustable ( One Timer for Each Compressor )
180
180
180
180
180
5
5
5
5
5
30
30
30
30
30
6
6
6
6
6
( One for Each Circuit )
3,0
3,0
3,0
3,0
3,0
( One for Each Water Cooler )
2
2
2
2
2
6
6
6
6
6
12
12
12
12
12
135
135
135
135
135
82
82
82
82
82
Manual Reset, Adjustable ( One Three-Phase Set for Each Fan Motor )
10
10
10
10
10
180
200
240
270
300
2,74
2,74
2,74
2,74
2,74
0,05
0,05
0,05
0,05
0,05
115
115
115
115
115
93
93
93
93
93
125
160
125
160
125
70
90
70
90
70
136
160
136
160
136
150
150
150
150
150
140
140
140
140
140
110
110
110
110
110
180
180
180
180
180
5
5
5
5
5
30
30
30
30
30
6
6
6
6
6
3,0
3,0
3,0
3,0
3,0
2
2
2
2
2
6
6
6
6
6
12
12
12
12
12
135
135
135
135
135
82
82
82
82
82
10
10
10
10
10
330
360
400
2,74
2,74
2,74
0,05
0,05
0,05
115
115
115
93
93
93
160
125
160
90
70
90
160
136
160
150
150
150
140
140
140
110
110
110
180
180
180
5
5
5
30
30
30
6
6
6
3,0
3,0
3,0
2
2
2
6
6
6
12
12
12
135
135
135
82
82
82
10
10
10
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