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Product Description
Hitachi Water Cooled Screw Chillers:MODEL CODE
Hitachi Water Cooled Screw Chillers:UNIT STRUCTURE
Hitachi Water Cooled Screw Chillers:HIGH EFFICIENCY AND ECO-FRIENDLY
1. Adopt the latest R134a high efficiency twin-screw compressor with great capability and higher stability.
2. Equip refrigerant distributors for both inlet and outlet of evaporator improving refrigerant distributions and heat exchanger
efficiency. The sub cooler is installed in the condenser, which could increase condensate depression and cycle efficiency.
3. Flooded units equip with efficient oil + scavenge pump + oil level optoelectronic switch, which is simple, reliable and
without operating risk of that the compressor is lack of oil.
Flooded units equip with Application of Differential Pressure Flow Switches with effective anti-freezing capability
Hitachi Water Cooled Screw Chillers:WZY SERIES OPERATION RANGE
In 1972 we manufactured the first semi-hermetic twin-screw compressor in refrigeration areas. Until now we have delivered
more than 200000 Hitachi twin-screw compressors to countries around the world. WZ Series adopt the latest Hitachi G-type
compressors, which provides greater service to clients
INDEPENDENTLY DEVELOPED HITACHI G-TYPE SEMI-HERMETIC TWIN-SCREW COMPRESSOR
1. Independently developed new rotors decrease internal leakage of refrigerant during the compression process as possible.
2. The rotors are manufactured by the most advanced abrasive process equipment and 3d measurement technique with high
precision, the best operating clearance, the least friction, high plot ratio under the film seal, which could operate efficiently and reduce the vibration and noises.
3. Capacity Control: Stepless Adjustment 100%~25%.
4. Double-Casing Design, reducing the operating noises.
5. Capacity Adjusting Valve automatically resets to the minimum load decreasing starting current.
6. Internal motor, without couplings, prevents discharge of refrigerant, using refrigerant cooling motor to lower fault rate and
prolong the service life.
7. Installed thermostats, protecting the motor and lube.
8. Pressure differential oil supply (no oil pump), with the least components, ensuring operating reliability, easy to maintain.
9. Internal exhaust non-return valve, effectively preventing reversion of rotors caused by compressed air back surging when
stopping.
10. Internal Suction Filter, filtering large grained impurity, protecting screw surface from damages.Compressor equipped with oil heater, oil sight glass, oil, repair hole and exhaust valve, convenient for maintaining.
Hitachi Water Cooled Screw Chillers:Characteristics of condenser
1. Perfect forced cooling design, enlarge cooling capacity, improve refrigerating efficiency.
2. High efficiency warping tube, enlarge heat exchange area, enhance refrigerant disturbed flow of tube, improving heat exchange rate.
Hitachi Water Cooled Screw Chillers:CYCLONE OIL SEPARATOR
The adoption of centrifugal oil separator is one of the major features of the Hitachi unit. Compared with the traditional filter type oil separator, there is no resistance produced by the oil filter net, and the energy consumption of the compressor is reduced.The oil separation efficiency is greatly improved, the oil entering the heat exchanger is greatly reduced, the COP of the unit is greatly improved, and the lubrication of the compressor is effectively ensured.
Hitachi Water Cooled Screw Chillers:100-125RT EVAPORATOR
1. Dry Type evaporator, with low quantity of refrigerant sealed, has a good performance of oil return, dispensing with external oil pump or oil return filter. It has no easy damaged parts and has low costs of maintenance.
2. The outlet and inlet of the refrigerant appear asymmetric in distribution. By utilizing the refrigerant, it increases efficiency of heat transfer.
3. The inlet of the refrigerant, designed to mesh distributor, implement the most reasonable distribution of the refrigerant.
4. Multi-condensing units circulate independently, which makes good performance on standby application
Hitachi Water Cooled Screw Chillers:155-520RT EVAPORATOR
1. Flooded-evaporator, with the latest researched heat transfer tube, increases the refrigerant's capability of distributing, and improves the efficiency of heat transfer.
2. The outlet and inlet of the refrigerant appear asymmetric in distribution. By utilizing the refrigerant, it increases efficiency of heat transfer.
3. The refrigerant distributor in the evaporator implement the most reasonable distribution of the refrigerant.
Hitachi Water Cooled Screw Chillers: REFRIGERANT CIRCUIT
Each compressor can operate independently, with good standby application, including exhaust check valve, safety valve, pipe ball valve, filter, service valve, pressure switch, pressure sensor, thermistor and etc.
ADVANCED MICROCOMPUTER CONTROL SYSTEM
Clear User-friendly LCD touch Console
1. 7-inch LCD touch console, visual, simple, intuitive.
2. The display makes it easy to view the current operating status and simplify the setting procedure.Various parameters can be confirmed at a glance. Regardless of operating status, the console allows you to set a variety of operation modes.
3. A warning log function makes it possible to recall the latest 10 recent warning events.
4. The user interface is provided in both English and Chinese, suitable for domestic and international market demand.
Hitachi Water Cooled Screw Chillers: ACCURATE UNIT CONTROL
CONTINUOUS CAPACITY CONTROL
The combination of Microcomputer Control System and Continuous Compressor Technology makes continuous capacity control and temperature adjustment more stable, partial load regulation more accurate.
BALANCED COMPRESSOR OPERATION
Multiple compressors automatically balance operating time by each of themselves.
EXTENSIVE FUNCTIOINS
Support linkage between the main machine and water pumps. Ensure operating safety.
TEMPERATURE CONTROL
Available to choose the inlet or outlet water temperature. Set point of control accuracy: ±0.5°C Satisfied various needs
CENTRALIZED-CONTROL SYSTEM (SATISFYING INTELLECTUAL USAGE NEEDS )
MODBUS-RTU IS ALTERNATIVE, WHICH CAN CONNECT WITH THE BUILD MANAGEMENT SYSTEM
The thermostat delays the compressor starting time, avoiding starting frequently so as to protect the
COMPLETE PROTECTIONS
SAFETY VALVE
If the pressure of condenser is too high, and all the other protectors are out of work, the safety valve will start to protect the units from being damaged.
THREE-SECTION OVER-CURRENT PROTECTION
When the current of the compressor is higher than its set value, the overcurrent relay will turn off the circuit and the compressor will stop the service.
OVER-HIGH EXHAUST TEMPERATURE PROTECTION
If the temperature of the exhausting is too high, the liquid-side refrigerant will start to protect the compressor.
DIFFERENTIAL WATER PRESSURE SWITCH PROTECTION
When the chilled water flow is too low or even cutoff, the water pressure differential will start to work and the unit will stop working. It will protect the evaporator from being frozen.
COMPRESSOR MOTOR TEMPERATURE PROTECTION
The thermostat is installed into compressor motor and could shut the motor down when its temperature is higher than normal.
OIL HEATER
Ensure the great lubricating performance. Prevent the oil foaming induced by Starting
AVOIDING FREQUENTLY STARTING AND STOPPING OF COMPRESSORS
The thermostat delays the compressor starting time, avoiding starting frequently so as to protect the compressor.
PROTECTION FOR OPTOELECTRICAL OIL LEVEL SWITCH
Stop and alarm when the compressor operates beyond 1min with oil shortage, which avoids risks caused by oil shortage.
HIGH - PRESSURE PROTECTION& LOW - PRESSURE PROTECTION
The protector turns on to make the compressor stop when the discharge pressure exceeds the set point or suction pressure is lower than set point.
ANTI-FREEZING PROTECTION
The anti-freezing protector turns on when the compressor temperature is lower than the set point, which avoids crystallization of refrigerating fluid in evaporator.
REVERSING PROTECTING DEVICE
The device inducts the phases of power supply, which protects compressors from reversing operation caused by wrong phase of the power supply
Product Parameters
| Model |
RCUF125WZY |
RCUF155WZY |
RCUF210WZY |
RCUF260WZY |
RCUF310WZY |
RCUF365WZY |
RCUF420WZY |
RCUF470WZY |
RCUF520WZY |
Nominal
Cooling
Capacity |
kW |
443.1 |
548.9 |
732.1 |
914.9 |
1,098 |
1,281 |
1,464 |
1,647 |
1,830 |
| RT |
126.0 |
156.1 |
208.2 |
260.2 |
312.3 |
364.3 |
416.3 |
468.4 |
520.4 |
| Compressor |
Quantity |
2 |
1 |
1 |
1 |
2 |
2 |
2 |
2 |
2 |
Starting
current(A) |
211/211 |
392 |
509 |
599 |
392/392 |
509/392 |
509/509 |
599/509 |
599/599 |
Rated
current(A) |
154 |
166 |
221 |
276 |
166/166 |
166/213 |
213/213 |
213/267 |
267/267 |
Total
power(kw) |
86.91 |
98.19 |
130.9 |
163.7 |
196.4 |
221.1 |
252.7 |
284.4 |
316.0 |
| Maximum current(A) |
230 400/400 |
249 |
331 |
415 |
249/249 |
240/320 |
320/320 |
320/400 |
400/400 |
| Condenser |
Chilled
waterflow
(m³/h) |
95.26 |
118.0 |
157.4 |
196.7 |
236.1 |
275.4 |
314.7 |
354.1 |
393.4 |
water-side
pressure drops
(kPa) |
54.7 |
87.8 |
90.1 |
92.3 |
87.8 |
91.0 |
93.3 |
95.6 |
97.8 |
| Evaporator |
Chilled
waterflow
(m³/h) |
76.20 |
94.41 |
125.9 |
157.4 |
188.9 |
220.3 |
251.8 |
283.3 |
314.7 |
water-side
pressure drops
(kPa) |
70.3 |
50.2 |
50.2 |
50.2 |
59.2 |
61.2 |
63.2 |
65.3 |
67.3 |
| Unit capacity range % |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
0,25-100 |
| Refrigerant |
Type |
R134a |
Quantity of
circuit |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| Dimension |
Length(mm) |
3,216 |
3,320 |
3,320 |
3,320 |
4,693 |
4,693 |
4,693 |
4,693 |
4,693 |
| Width(mm) |
1,097 |
1,700 |
1,700 |
1,700 |
1,766 |
1,766 |
1,766 |
1,766 |
1,766 |
| Height(mm) |
1,568 |
2,258 |
2,258 |
2,258 |
2,318 |
2,318 |
2,318 |
2,318 |
2,318 |
| Dry weight |
Kg |
2,190 |
3,494 |
3,900 |
4,060 |
7,011 |
7,293 |
7,571 |
7,812 |
8,052 |
External dimensions
RCUF100/125WZY DIMENSIONAL DATA
RCUF155/210/260WZY DIMENSIONAL DATA
RCUF310/365/420/470/520WZY DIMENSIONAL DATA
Detailed Photos
Company Exhibition Hall
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