Q Mar. 2008
H I TA C H I WAT E R - C O O L E D C H I L L E R S
E
The High-efficiency water-cooled chiller WUZ series uses a new refrigerant, R407C. Reliability is higher due to a new screw
F
Energy saving with high efficiency
WUZ
Example of COP comparison
COP is 5.19 on RCUP43WUZ of the new series, an increase of 18% from RCU50SY3E of the conventional series.
118%
[%]
100% 100
5.19
4.39
compressor with a cyclone oil separator, Hitachi’s unique technology. Many industrial applications are possible due to
0
RCU50SY3E
RCUP43WUZ * Comparison when RCU50SY3E is 100%
precise control of water temperature and wide range of operation. Industry-leading partial load properties
Cooling operation
E
F
COP ratio (%)
High COP is possible even at minimum load.
100.0
15
At full load (100%)
20
30
40
50
60
70
80
90
Capacity ratio (%)
1
2
Plate heat exchangers
Hitachi uses less refrigerant to help protect the environment, such as by using plate heat exchangers.
As shown in the drawing , refrigerant R22 and R407C deliver similar cooling performance. The use of R407C makes the size more compact than R134a refrigerant.
ISO 9001
ISO 14001
Refrigerant and COP
Performance coefficient
Hitachi uses R407C
1.1
R134a
R22
1.0
R407C 0.9
0.8
0.7 0.5
1.0
Cooling ability
100
1.5
H I TA C H I WAT E R - C O O L E D C H I L L E R S
E
F
Continuous capacity control
A simple structured high-performance new twin screw compressor
60sec.
Start
Inlet water temperature
Load-up signal
Inlet water temperature
2sec. 60sec.
Outlet water temperature
Outlet water temperature
8
New screw compressor operation image
Neutral zone standard
6
Externally attached oil separator
• Working range is extended by 15%. • The number of parts is reduced to 1/10 of the reciprocating compressor.
When there is a big difference between set temperature and actual temperature.
2sec.
The temperature of the chilled water outlet can be kept at the set temperature ±1°C by continuous capacity control, so it is suitable for industrial use.
Hitachi’s new screw compressor has the following features: • Oil carry-out ratio is by less than 1% due to cyclone oil separator.
Load-up signal
WUZ
Externally attached oil pump
4
Lapsed time
Cyclone oil separator
Discharged gas
Load-down signal
A given load status is maintained.
Suctioned refrigerant gas
Stop temperature standard
Stop
2sec.
Screw rotor
The inlet water temperature is detected at a stop, and it is restarted by a raise in inlet water temperature.
60sec.
Oil
Building Management System
Many applications
Oil reservoir
Standard Type
Differential pressure lubrication mechanism
HARC70-CE
Hitachi uses Building Management System through LONWORKS . For chiller airconditioning, Hitachi provides its own central station system. Simply connect chiller and LONWORKS via a HARC70-CE. No complicated work is necessary.
HITACHI made
R
Low vibration
Vibration comparison Type
No exclusive vibration control equipment is necessary due to the low-vibration screw compressor.
Comp. speed (rpm) 50/60Hz Full amplitude Vib. frequency
At leg of comp. At base frame At leg of comp.
At base frame Acceleration energy
3
Compact and light
Reciprocating
Screw
1,430/1,720 20-30
2,880/3,470 5-8
20
Less than 10
23.8/28.7
48.5/57.8
Conventional Mountable model (HP) new models (HP)
21% decreased
40 50 60 80 100 120 150 180 200
Installation space
22% decreased Net weight
21% decreased Volume
Conventional model
New model
RCU60SY3E
RCUP43WUZ
2.19 1.47 970
1.74 1.14 765
Installation space (m2) Net weight (kg)
Comparison with RCU-SY3E series
*
System example of step control type
As Hitachi's new type of water-cooled chiller holds less water, so fewer facilities are necessary.
Mixed 3-way valve
Hitachi's CSC-5S central station system newly developed for the Hitachi screw chiller provides monitoring as well CSC-5S as individual and quantity control. It can control up to 8 chillers and be installed according to the customer's air-conditioning environment needs. Unlike conventional machines, the functions can be checked from the control room via remote control, thus reducing the need to visit the machine room for manual checking.
BMS System （Supplied by BMS Maker）
Remote Setting
Remote Monitor
■ ON
■ ON
/ OFF operation ■ Chilled water temperature (inlet or outlet)
Pump
Pump P
P
HARC70-CE
HITACHI made Connectable up to 1 Units（maximum）
* BMS System （Supplied by BMS Maker）
Remote Setting
Remote Monitor
■ ON
■ ON
/ OFF operation ■ Chilled water temperature (inlet or outlet)
Tank
/ OFF status chilled water temp.(inlet or outlet) ■ Current water temp. of inlet and outlet ■ Alarm code ■ Operating status : Discharge gas pressure (each cycle) ■ Setting
Suction gas pressure (each cycle) Discharge gas temperature (each cycle) Suction gas temperature (each cycle)
P
Pump
/ OFF status chilled water temp.(inlet or outlet) ■ Current water temp. of inlet and outlet ■ Alarm code ■ Setting
Option Type
System example of continuous capacity control type
Load
Decreased holding water quantity
Bypass pipe
F
60 80 80 150 150 150 180 180 240
Recommended
Load
E
4
Connectable up to 4 Units（maximum）
New models fit in the same space as smaller conventional models
(m3)
**
48/57.8 23.8/28.7 Screw: 1/5 of reciprocating type
Volume
As shown in the drawing on the right, the volume, installation space and weight are all reduced, making installation easy.
R
Tank
* Decrease in tank capacity, mixed 3-way valve, one pump, bypass pipe, etc. are not required.
trademarks of Echelon Corporation registered in the * "LUnitedW States" "LandMother" arecountries. ON
ORKS
ON ARK
WUZ
H I TA C H I WAT E R - C O O L E D C H I L L E R S
GENERAL DATA
DIMENSIONAL DATA
Model Continuous Control Type RCUP34WUZ RCUP43WUZ RCUP51WUZ RCUP67WUZ RCUP85WUZ RCUP101WUZ RCUP128WUZ RCUP151WUZ RCUP171WUZ RCUP202WUZ
50Hz Nominal Cooling Capacity 60Hz
kW
118
150
180
236
300
355
450
530
600
710
kcal/h
101,480
129,000
154,800
202,960
258,000
305,300
387,000
455,800
516,000
610,600
USRT
33.6
42.7
51.2
67.1
85.3
101.0
128.0
150.7
170.6
201.9
kW
132
170
200
265
335
400
510
600
670
800
kcal/h
113,520
146,200
172,000
227,900
288,100
344,000
438,600
516,000
576,200
688,000
USRT
37.5
48.3
56.9
75.4
95.3
113.8
145.0
170.6
190.5
227.5
RCUP34WUZ, 43WUZ, 51WUZ and 67WUZ Check Valve
Electrical Box
Holes for Power Supply Wiring (φ64.5)
1,524
Capacity Control Step Control Type
100, 75, 50, 25, 0
100, 75, 50, 0
%
Screw Compressor
Oil Heater
Hole for Control Circuit Wiring(φ32.5)
100, 66, 33, 17, 0 Expansion Valve
100~15, 0
%
Continuous Control Type
Units : mm
Outer Dimension
Water Cooler Economizer
38
mm
1,524
1,524
1,524
1,524
1,672
1,672
1,672
1,646
1,646
1,646
Width
mm
1,225
1,225
1,225
1,400
1,260
1,260
1,260
1,207
1,300
1,300
Depth
mm
934
934
934
934
1,661
1,661
1,661
2,466
2,466
2,466
Height
Net Weight
Kg
750
765
830
950
1,550
1,650
Refrigerant
1,750
2,470
2,550
[only for 67WUZ]
Condenser
Dimensions table Dimen.
Terminal (for Earth)
45
2,670
Solenoid Valve for Economizer
Stop Valve Fusible Plug
B
A
B
34WUZ
1,225
1,135
43WUZ
1,225
1,135
51WUZ
1,225
1,135
67WUZ
1,400
1,310
Model
[only for 67WUZ]
639 934
A
56
R407C Electronic Expansion Valve
Flow Control
2
1
Number of Circuits Compreesor Type
RCUP85WUZ, 101WUZ and 128WUZ
3
Units : mm
Semi-Hermetic Screw Type
Check Valve
Electrical Box
Model Step Control Type Continuous Control Type
30ASCP-H
40ASCP-H
30ASCP-Z
40ASCP-Z
Quantity
60ASCP-H
40ASCP-H
50ASCP-H
60ASCP-H
50ASCP-H
50ASCP-H
60ASCP-H
50ASCP-Z
60ASCP-Z
40ASCP-Z
50ASCP-Z
60ASCP-Z
50ASCP-Z
50ASCP-Z
60ASCP-Z
2
1
Oil Heater
3
6 1,672
Plate Type
Condenser
Plate Type
Water Cooler
Screw Compressor
Hole for Control Circuit Wiring(φ32.5) Water Cooler
Thermal Overcurrent Relay for Compressor (R,T Phase), High-Pressure Switch, Safety Devices
Economizer
Low-Pressure Control, Oil Heater, Internal Thermostat for Compressor, Fusible Plug,
[only for 128WUZ]
Condenser
Freeze Protection Device, Reverse Phase Protection Device, Operation Hour-Meter
Terminal (for Earth)
Victaulic Type
Piping Connections for Condencer
Expansion Valve
Inlet
3B
3B
3B
3B
3B
3B
3B
3B × 3
3B × 3
3B × 3
Outlet
3B
3B
3B
3B
3B
3B
3B
3B × 3
3B × 3
3B × 3
1,142 1,170
Inlet
3B
3B
3B
3B
3B
3B
3B
3B × 3
3B × 3
3B × 3
Outlet
3B
3B
3B
3B
3B
3B
3B
3B × 3
3B × 3
3B × 3
[only for 128WUZ]
1,270
1,260
Victaulic Type
Piping Connections for Water Cooler
45
Solenoid Valve for Economizer
Fusible Plug
Stop Valve
56
1,661
RCUP151WUZ, 171WUZ and 202WUZ NOTE : 1. The nominal cooling capacities are based on the following conditions. Temperature Conditions Chilled Water Inlet Temperature : 12˚C Condenser Water Inlet Temperature : 30˚C Chilled Water Outlet Temperature : 7˚C Condenser Water Outlet Temperature : 35˚C 2. Applicable Power Supplies Main Power Source (3φ) : Control (1φ) :
Options
Electrical Box
Check Valve
Water Strainer
3. Working Range Condenser Water Outlet Temperature : Condenser Water Temperature Difference : Chilled Water Outlet Temperature : Chilled Water Temperature Difference :
Oil Heater
Pressure Gauge for Low and High Pressure
Economizer [only for 171WUZ
22˚C to 37˚C 3.5˚C to 10˚C at 50Hz, 4.2˚C to 10˚C at 60Hz 5˚C to 20˚C 2.5˚C to 10˚C at 50Hz, 3.0˚C to 10˚C at 60Hz
Condenser
Expansion Valve
Water Cooler
Terminal (for Earth) Dimensions table
Fusible Plug
5. Provide a 20 mesh water strainer at the chilled and condenser water inlet. The 20 mesh strainer is available by Hitachi as an optional accessory.
7. Specifications in the above table are subject to change without notice in order that Hitachi may bring the latest innovations their customers.
and 202WUZ]
Hole for Control Circuit Wiring(φ32.5)
4. The common chilled water piping (filed-supplied) between each water cooler shall be connected directly at site. The water coolers in the same unit shall be connected to the same common piping.
6. Support the water pipes with stay not to give the weight of water pipes directly to the unit.
Screw Compressor
Holes for Power Supply Wiring (φ64.5×3)
HARC70-CE CSC-5S
220V 60Hz, 380V 50Hz, 415V 50Hz 220V 60Hz, 220V 50Hz, 240V 50Hz
Units : mm
1,646
5
50ASCP-H
Holes for Power Supply Wiring (φ115)
Solenoid Valve for Economizer [only for C B A
50
Dimen.
Stop Valve 2,084 2,466
A
B
C
151WUZ
1,207
1,099
949
171WUZ
1,300
1,274
1,124
202WUZ
1,300
1,300
1,124
Model
171WUZ and 202WUZ]
50