HITACHI AIR-COOLED WATER CHILLERS

Nominal Capacity Range 11200 kcal/h to 44800 kcal/h at 50Hz 13000 W to 52100 W 44400 Btu/h to 177800 Btu/h

Technical Catalog I

- Design Information -

Models : RCU-56A RCU-86A RCU-106A

RCU-166A RCU-206A

65MP6097

FEATURES HITACHI Air-Cooled Water Chillers has been developed for outdoor installation, featuring economical and reliable air conditioning systems covering residential, commercial and industrial cooling requirements. READY-TO-OPERATE All units are completely piped, charged, wired and tested with actual heat load before shipment and units are ready to operate only by connecting water piping and power wiring. HIGH EFFICIENCY By the combination of super slit-finned tube condenser and brazed plate heat exchanger cooler, highly-efficient cooling operation has been achieved. ADVANCED COOLER WITH BRAZED PLATE HEAT EXCHANGER Due to the benefit of brazed plate heat exchanger, the occupied volume can be reduced in a large scale and even get better cooling capacity. CLEAN WATER COOLER By using brazed plate heat exchanger cooler of stainless steel and pure copper, this chillers can eliminate rust and corrosion. Providing a reliable source of water that meets the highest purity requirements for industry use. RUST AND CORROSION PREVENTION All covers are in material of galvanized steel with electrodeposition synthetic resin and baking paints. And all covers fixing screws are in stainless steel to prevent rust and corrosion occurred.

REDUCED INSTALLATION SPACE Thinly compact and completely packaged in weather-proof cabinet design to offer quick and low cost transportation and installation even for narrow locations. SILENCER FOR DISCHARGED AIR The optimum design with high efficiency fan and forward curve air discharge duct to reduce sound. REMOTE CONTROL CONNECTING TERMINAL Reserved connecting terminals for remote control usage. It is easily for remote controlling from indoor control switch or fan coil units control switch. CONVENIENT CONTROL MODE SELECT The unit has a Control Mode Selection Switch to furnish Local Control or Remote Control modes switching. When proceeding service or maintenance works, the Local Control mode can provide convenient ON/OFF operating control and also isolate remote control circuit for preventing from accident.

RCU-56A~RCU-106A

RCU-166A~RCU-206A

HITACHI1

GENERAL DATA Unit General Data

NOTES:

Cooling capacity is based on the standard of JIS standard B8613-1987: Chilled Water Inlet Temperature : 12 (53.6) Chilled Water Outlet Temperature : 7 (44.6) Condenser Air Inlet Temperature : 35 (95.0)

Model RCU-56A RCU-86A RCU-106A RCU-166A RCU-206A

Nominal Cooling Capacity at 35 Outdoor Temperature 50Hz

kcal/h W

Btu/h

11200 13000 44400

18400 21400 73000

22200 25800 88100

38200 44400

151700

44800 52100

177800

Capacity Control % 100-0 100-0 100-0 100-50-0 100-50-0

Starting System Direct-On-Line Starting

Cabinet Color

Synthetic Resin Painted on Galvanized Steel Plates Beige

Height mm (ft-in) 1950

(6-4 12/16) 1950

(6-4 12/16) 1950

(6-4 12/16) 1982

(6-6 1/16) 1982

(6-6 1/16)

Depth mm (ft-in) 455

(1-5 15/16) 585

(1-11 1/16) 585

(1-11 1/16) 685

(2-2 15/16) 685

(2-2 15/16) Outer Dimensions

Width mm (ft-in) 900

(2-11 7/16) 1070

(3-6 1/8) 1070

(3-6 1/8) 1797

(5-10 3/4) 2140

(7-0 1/4)

Net Weight kg (lbs) 250

(551) 340

(749) 360

(793) 660

(1455) 700

(1543)

Refrigerant Number of Circuits 1 1 1 2 2

Compressor

Model Quantity

Hermetic Scroll

483DH-77D1 1

Hermetic Scroll

901EH-144D31

Hermetic Scroll

1101EH-170D3 1

Hermetic Scroll

901EH-144D32

Hermetic Scroll

1101EH-170D32

Control of Refrigerant Flow Capillary Tube

Condenser Multi-Pass Cross Finned Tube

Condenser Fan Motor Quantity

kW (hp)

0.3 (0.40)

1

0.4 (0.53)

1

0.4 (0.53)

1

0.4 (0.53)

2

0.4 (0.53)

2

Water Cooler Brazed Plate Heat Exchanger

Pum

p

Head mAq 19.5 29.5 28 22 32

Standard Flow Rate m3/h 2.24 3.68 4.44 7.64 8.96

Pressure Drop mAq 9.1 10.2 11.2 12.7 17.9

Chi

ller

wat

er

Unit outside Head mAq 10.4 19.3 16.8 9.3 14.1

Safety Devices Over-Current Relay, Thermostat, High Pressure Switch, Low Pressure Switch, Freeze Protection Thermostat, and Fuses for Control Circuit

Connections Water Cooler Inlet & Outlet Outer Diameters FPT 1-1/4 FPT 1-1/2 FPT 1-1/2 FPT 2 FPT 2

Wiring Holes mm (in) 62

(2 7/16) 62

(2 7/16) 62

(2 7/16) 62

(2 7/16) 62

(2 7/16)

Height mm (ft-in) 2112

(6-11 1/8) 2014

(6-7 5/16) 2014

(6-7 5/16) 2160

(7-1 1/16) 2160

(7-1 1/16)

Depth mm (ft-in) 596

(1-11 7/16) 726

(2-4 9/16) 726

(2-4 9/16) 830

(2-8 11/16) 830

(2-8 11/16)

Width mm (ft-in) 1034

(3-4 11/16) 1204

(3-11 3/8) 1204

(3-11 3/8) 1941

(6-4 7/16) 2284

(7-5 7/8)

Approximate Packing List

Measurements m3 1.30 1.76 1.76 3.47 4.09

Shipping Weight kg (lbs) 285

(628) 380

(837) 400

(881) 700

(1543) 740

(1631)

HITACHI 2

UNIT DIMENSIONS

Unit Dimensions RCU-56A

RCU-86A & 106A

HITACHI3

UNIT DIMENSIONS

Unit Dimensions RCU-166A & 206A

HITACHI 4

DIMENSIONAL DATA and SELECTION DATA

Operation Space

Dimensions (Unit : mm) Model

A B C D L

RCU-56A 1000 0 500 500 1000

RCU-86A 1000 0 500 500 1000

RCU-106A 1000 0 500 500 1000

RCU-166A 1000 0 500 500 1000

RCU-206A 1000 0 500 500 1000

NOTE: The dimension B is indicated that the wall could be near units lower cover. But the wall still shall be kept not to block the air discharge.

Center of Gravity

Center of Gravity

X Y Z

RCU-56A 490 600 180

RCU-86A 450 620 240

RCU-106A 450 500 240

RCU-166A 915 270 307

RCU-206A 1134 270 309

HITACHI5

SELECTION DATA

Pump Head Curves And Unit Water Pressure Drop Curves

HITACHI 6

SELECTION DATA and ELECTRICAL DATA Conversion Multiplier 1 kcal/h = 1.163 W = 3.968 Btu/h 1 mAq = 9.81 kPa

RCU-56A RCU-86A RCU-106A RCU-166A RCU-206A ABT COT

CAP

5.0 12.1 20.8 24.6 41.7 49.2 7.0 12.5 21.9 25.9 44.2 51.9 9.0 12.8 22.8 26.8 46.6 54.8

20.0

11.0 13.1 23.6 27.7 48.9 57.5 5.0 11.5 19.0 22.9 38.9 45.3 7.0 12.3 20.3 24.3 41.0 48.3 9.0 12.8 21.5 25.5 43.3 51.2

28.0

11.0 13.2 22.2 26.8 45.5 53.8 5.0 10.4 17.5 21.1 36.1 42.2 7.0 11.2 18.4 22.2 38.2 44.8 9.0 11.9 19.4 23.7 40.1 47.5

35.0

11.0 12.6 20.3 24.9 42.1 49.9 5.0 9.7 16.5 19.5 33.9 39.2 7.0 10.4 17.3 20.9 35.9 42.1 9.0 11.2 18.3 22.0 37.8 44.8

40.0

11.0 11.8 19.0 23.2 39.6 47.2 ABT : Condenser Air Inlet Temperature () COT : Chilled Water Outlet Temperature () CAP : Cooling Capacity (x 1,000al/h) NOTE Chilled Water Flow RateStandard (Ref. Unit General Date.)

Electrical Data

Unit Main Power

Applicable Instantaneous Voltage Model

VOL Hz Maximum Minimum

Maximum Unit

Current (A)

minimum Starting Voltage

(V)

RCU-56A 380 415 50 50

418 456

342 374

13 323

RCU-86A 380 415 50 50

418 456

342 374

22 323

RCU-106A 380 415 50 50

418 456

342 374

26 323

RCU-166A 380 415

50 50

418 456

342 374

43

323

RCU-206A 380 415

50 50

418 456

342 374

51

323

VOL : Rated Unit Power Supply Voltage (V) (Plated) Hz : Frequency (Hz)

NOTE The maximum unit current is the total running current of the unit under the following conditions, which consume the

maximum current within the unit working range: Supplied voltage: 342V Condenser Air Inlet Temperature 43 Chilled Water Outlet Temperature 15 Capacity Control 100% Chilled water flow rate Standard Therefore, the sizes of wiring and fuses must be determined according to the applicable national and local codes.

HITACHI7

WORKING RANGE and COMPONENT DATA

Working Range Power Supply Working Voltage : 90% to 110% of the Rated Voltage Voltage Imbalance : Within a 3% Deviation from Each Voltage at the Compressor Terminals

Chilled Water Temperature and Outdoor Temperature NOTE

1.Chilled water flow rate range shall be 100%~150% standard flow rate (ref to page 2). 2.Because it will cause Anti-Freeze Switch action that is too small of chilled water flow rate ,so please request

fortifications to add the chilled water flow switch 63W (ref to. ELECTRICAL WIRING DIAGRAM).

Chilled Water Outlet Temperature Condenser Air Inlet Temperature

Maximum Minimum Maximum Minimum

15 (59)

5 (41)

43 (109.4)

10 (50)

Test

Item Content

chilling water qualitystandards

Cooling water qualitystandards

1 PH(25)

6.0 - 8.0 6.5 - 8.0

2 Electrical Conductivity (25)S/cm 200 below 800 below

3 Chlorine lon (Cl-) (mg Cl-/ l) 50 below 200 below

4 Sulfur Acid on (SO2-4)( mg SO2-4 / l) 50 below 200 below

5 M Alkalinity PH(4.8)(CaCO3) ( mg CaCO3 / l)

50 below 100 below

6 Total Hardness (CaCO3)( mg CaCO3 / l) 50 below 200 below

7 Total Iron (Fe) ( mg Fe / l) 0.3 below 1.0 below

8 Sulfur Lon (S2 -) ( mg S2-/ l)

9 Ammonium Ion (NH+4)( mg NH+4 / l) 0.2 below 1.0 below

10 Silica L SiO2 ( mg SiO2 / l) 30 below 50 below

HITACHI 8

Water quality standards table:

()

CONTROL SYSTEM

Refrigerant Circuit In addition to the basic air-cooled water chiller components (compressor, condenser and water cooler), the following components are equipped in each circuit. Strainer This strainer is equipped at the liquid refrigerant piping, and filter foreign particles from the liquid refrigerant. Capillary Tubes The capillary tubes are equipped for refrigerant flow control.

Standard Electrical Control Sequence A field-supplied main power switch supplies power to the unit. When all safety devices and the thermostat are calling the cooling operation, the condenser fan and the compressor are automatically operating by pushing the operation switch. The compressor are protected against the harmful cycling operation by timer relay and manual restarting system; the timer relay cut in the compressor operation approximately three minutes after the thermostat has called. For details, refer to the typical wiring diagrams.

HITACHI9

CONTROL SYSTEM

Protection and Safety Control The safety and protection devices are equipped in the unit to ensure dependable and long life operation. Their functions should be carefully noted, and field adjustment is not recommended, if the setting is maintained at the point listed in the table. Compressor Protection 1. The pressure switch protects against excessive

discharge pressure. This switch cuts out compressor operation when the discharge pressure exceeds the setting.

2. Over-current relays equipped in the magnetic switch box cut out each compressor operation when the current to the compressor exceeds the setting.

3. The surface thermostat on the top shell of compressor is cut out the compressor operation when the temperature

of the top shell exceeds the setting. Condenser Fan Motor Protection The over-current relays for the condenser fan motors cut out fan operation and compressor operation, when the current to the fan motor exceeds the setting. Refrigerant Circuit Protection 1. The fusible plug equipped immediately upstream of the

capillary tube melts, when refrigerant temperature exceeds the melting point.

2. The freeze protection thermostat, of which sensor is located on the refrigerant tube near the refrigerant outlet of water cooler, cuts out the compressor operation, when the surface temperature of the tube decreases below the setting.

CCP Timer : Compressor Cycling Protection Timer

Unit Model RCU-56A RCU-86A RCU-106A RCU-166A RCU-206A For Compressor

Dual Pressure Switch Automatic Reset, Non-Adjustable High

Cut-Out Cut-In

kg/cm2GkPa

kg/cm2GkPa

28.0 2,850 22.0

2,260

28.0 2,850 22.0

2,260

28.0 2,850 22.0

2,260

28.0 2,850 22.0

2,260

28.0 2,850 22.0

2,260

Over-current Relay Automatic Reset, Non-Adjustable

380V / 415V 50HZ A 12.1 20 25 25 25 Temperature Protection Automatic Reset, Non-Adjustable

Thermostat Type External External External Internal Internal

Cut-Out Cut-In

1205 9811

1205 9811

1205 9811

1205 9811

1205 9811

Crankcase Heater Capacity W 60 60

CCP Timer Non-Adjustable Setting Time Min. 3 3 3 3 / 3.5 3 / 3.5

For Condenser Fan Motor Over-current Relay 380V / 415V 50HZ

A

1.6

1.8

1.8

1.8

1.8 For Control Circuit

Fuse Capacity 220V-240V

A

3

3

3

3

3

Freeze Protection Thermostat

(One for Each Unit)

Cut-Out Cut-In

11.5 7

11.5 7

11.5 7

11.5 7

11.5 7

10HITACHI

CONTROL SYSTEM ELECTRICAL WIRING DIAGRAM OF HITACHI AIR-COOLED WATER CHILLER (SCROLL TYPE) (MODEL : RCU-56A)

11

CONTROL SYSTEM

ELECTRICAL WIRING DIAGRAM OF HITACHI AIR-COOLED WATER CHILLER (RECIPROCATING TYPE) (MODEL : RCU-86A)

12

CONTROL SYSTEM

ELECTRICAL WIRING DIAGRAM OF HITACHI AIR-COOLED WATER CHILLER (SCROLL TYPE) (MODEL : RCU-106A)

13

CONTROL SYSTEM

ELECTRICAL WIRING DIAGRAM OF HITACHI AIR-COOLED WATER CHILLER (RECIPROCATING TYPE) (MODEL : RCU-166A)

14

CONTROL SYSTEM

ELECTRICAL WIRING DIAGRAM OF HITACHI AIR-COOLED WATER CHILLER (RECIPROCATING TYPE) (MODEL : RCU-206A)

15

INSTALLATION DATA

Foundation Provisions

Dimensions

A B Model

deg. mm deg. mm

RCU-56A 0.5 (5) 0.5 (10)

RCU-86A 0.5 (5) 0.5 (10)

RCU-106A 0.5 (5) 0.5 (10)

RCU-166A 0.5 (5) 0.5 (15)

RCU-206A 0.5 (5) 0.5 (15) Foundation The recommended foundation is the concrete curb as shown below.

Dimensions for Foundation

NOTE: The foundation should be provided as shown in the figures in order to reduce peration sounds of the compressor, coming from the gap between the base frame of the unit and the foundation.

Wiring Provisions

Field Wiring The units are internally wired at the factory according to generally accepted electrical technology. Required Field Wiring Main power wiring to the unit, wiring for the chilled water circulation pump and earth wiring are required in the field. Required Components The following components are required: main power switch, main power fuses or fuse free breakers and conduit couplings.

Wire and Fuse of Fuse Free Breaker Selection Wire and fuse or fuse free breaker sizes should be selected in accordance with national and local codes, taking the design maximum temperature into account. The unit maximum current shall be the sum of the compressor maximum current and condenser fan motor current.

Dimensions Model

a b c d e f g

RCU-56A 930 1030 290 390 M10X125 95 10

RCU-86A 1100 1200 420 520 M10X125 95 10

RCU-106A 1100 1200 420 520 M10X125 95 10

RCU-166A 1817 1917 462 562 M12X170 140 12

RCU-206A 2160 2260 462 562 M12X170 140 12

16HITACHI

SPECIFICATIONS

Installation Example * : Field-Supplied

NOTES: 1. To purge air from the water system, secure the gradient, over 1/200 against the air purge location. 2. Install the expansion tank in the suction line to the water pump in order to accept the water expansion, and secure

the level of expansion tank shall be higher than the top point of the whole chilled water piping system for over 1m. 3. The Y-shape stranger has been installed in the unit already. It shall be checked its situation at state periods,

especially after the first-time test running.

HITACHI17

APPLICATION DATA

Standard Specifications UNIT The unit shall be an air-cooled scroll or reciprocating water chiller for application with R-22 refrigerant. And shall be factory-completed with compressor(s), refrigeration cycle(s), air-cooled condenser(s), a brazed plate heat exchanging water cooler, condenser fan motor(s), a direct-on-line starter, protective and safety devices, capillary tube(s), and shall be factory assembled, piped, internally wired and charged with R-22 refrigerant. The unit shall be completely weather-proofed for outdoor installation. The unit shall comply with Japanese Industrial Standards. CAPACITY The cooling capacity of the unit shall be __________ kcal/h or greater under the following conditions: __________ m3/h chilled water flow rate, __________ chilled water inlet temperature, __________ chilled water outlet temperature, __________ condenser air inlet temperature, and water cooler fouling factor of __________ m2h/kcal or greater. The pressure drop of the water cooler shall not exceed __________ mAq. The compressor input shall not exceed __________ kW under the prescribed conditions. POWER SUPPLY The unit shall operate on __________ V, __________ Hz, 3 phase, and shall be capable of operating within maximum __________ V and minimum __________ V. DIMENSIONS The unit shall have a height of __________ mm, a width of __________ mm, and a depth of __________ mm. CABINET The cabinet shall be constructed of galvanized steel, baked with synthetic resin paint. The service cover shall be easily removable for service access to the electrical components, including compressor(s), magnetic switches and electrical devices. COMPRESSOR The unit shall be hermetic scroll compressor.

WATER COOLER The water cooler shall be brazed plate heat exchanging type. The refrigerant side of the heat exchanger shall be cleaned, dehydrated and tested for leakage at the maximum permissible working pressure of __________ kg/cm2. The water side of the heat exchanger shall be tested for water leakage at the maximum permissible working pressure of __________ kg/cm2. The cooler shall be equipped with a freeze protection thermostat to protect against freezing. CHILLED WATER PUMP The unit shall contain stainless centrifugal chilled water pump. The pump must supply water flow rate __________ m3/h. And water head __________ m Aq FAN AND FAN MOTOR The condenser fan shall be the propeller type directly driven by a __________ W motor. The winding and hearing of the condenser fan motor shall be of weather-proof construction. CONDENSER The condenser shall be the multi-pass, cross-finned tube type equipped with aluminum plate fins, mechanically bonded to seamless, oxygen-free copper tubes. The coil shall be cleaned, dehydrated and tested for leakage at the maximum permissible working pressure.

18

HITACHI Specifications in this catalog are subject to change without notice, in order that HITACHI may bring the latest innovations to our customers.

Catalog No. TCU-TC1, 2006 Printed in Taiwan