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036-33072-001 Rev. A (0601)

Unitary Products Group

5

Location -To ensure unit operates at maximum efficiencies,
choose a dry indoor area where the temperature is controlled
between 50 deg F and 115deg F. Consideration of surround-
ing areas should be taken when choosing a location to install
the unit. Common vibration and sound levels associated with
commercial equipment may be objectionable to people or
equipment. Install thermostats, air supplies and returns so
that each unit will operate only on individual unit control.

UNIT MOUNTING

The 5 through 25 ton models are shipped as a fully assem-
bled integral package. The 5-15 ton units may be field split
between the evaporator/compressor section and the upper
blower section; to allow for passage through doors, elevators,
hallways, etc. Units are not intended for outdoor installation.

Floor mounted units should be secured on a solid, level sur-
face or sturdy stand. (refer to typical installation diagram on
Page 4). The use of an isolating rubber sheet is recom-
mended to reduce vibration and noise transmission. Ensure
that the entire base is continuosly supported -do not support
unit at corner points only!

GENERAL DATA

TABLE 1: GENERAL UNIT INFORMATION

Note: The water cooled coaxial condensers in these units
have copper tubing and are NOT suitable for salt or brackish
water. Do not install these units outdoors, or in any area
where the surrounding temperature may drop below 32
degrees F.

LOCK

ALL

ELECTRICAL

POWER

SUPPLY

SWITCHES IN THE OFF POSITION BEFORE
INSTALLING THE UNIT. FAILURE TO DISCON-
NECT POWER SUPPLY MAY RESULT IN ELEC-
TRICAL SHOCK OR EVEN DEATH.

WARNING

Model

CU060

CU096

CU120

CU180

CU240

CU300

Nominal Cooling (Ton)

5

8

10

15

20

25

Cooling Performance

Gross Cooling Capacity (Btuh)

63300

100600

127800

188600

246800

322000

Design CFM

2000

3200

4000

6000

8000

10000

Compressor - Type

Scroll

Number Used

1

2

2

2

2

2

Evaporator Coil - Type

Copper Tubes, Aluminum Fins

Face Area (sq. ft.)

5.00

9.37

10.50

15.11

19.00

19.79

Rows/FPI

3/12

3/12

3/13

3/12

3/14

4/12

Condenser - Type

Coaxial

Number Used/Tons Capacity

1/5

2/4

2/5

2/7.5

2/10

3/7.5

Nominal Water flow rate (gpm)

15

24

30

45

60

75

Unit Water Connection Size

1” FPT

1-1/4” FPT

1-1/4” FPT

1-1/2” FPT

2” FPT

2” FPT

Evaporator Fan - Type

Centrifugal, Forward Curved

Number Used

1

1

1

2

2

2

Diameter x Width (in.)

12x9

15x12

15x12

15x9

15x11

15x11

Drive

Adjustable Belt

Motor HP (Standard/Oversize)

0.75/1

1.5/2

2/3

3/5

5/7.5

7.5/10

Filters

Number Used-Size (in.)

2-20x16

4-14x25x2

6-14x20x2

2-16x20x2
4-16x25x2

6-20x25x2

8-20x20x2

Condensate Drain Connection

3/4 FPT

Weight

Shipping

625

815

975

1350

1525

1825

NOTE: Cooling performance is rated at 80 degrees F dry bulb 67 degrees F wet bulb entering air temperature, CFM listed,

85 degrees F entering 95 degrees F leaving water temperature, and water flow rate listed.

Gross capacity does not include the effect of evaporator fan motor heat.

Summary of Contents for CU096

Page 1: ...ANUAL WATER COOLED AIR CONDITIONING UNITS MODELS CU060 096 120 180 240 300 036 33072 001 Rev A 0601 CONTENTS GENERAL 3 INSTALLATION 4 GENERAL DATA 5 DIMENSIONAL DATA 6 WATER PIPING 8 DUCTWORK 11 EVAPORATOR BLOWER DISCHARGE CONVERSION 12 ELECTRICAL WIRING 12 MOTOR AND PULLEY DATA 16 MAINTENANCE SERVICE 19 ...

Page 2: ...IONAL DATA 6 WATER PIPING 8 CONDENSOR PRESSURE CONTROL 9 DUCTWORK 11 SUPPLY AIR I RETURN AIR CONFIGURATION 11 EVAPORATOR BLOWER DISCHARGE CONVERSION 12 ELECTRICAL WIRING 12 MOTOR AND PULLEY DATA 16 BLOWER SPEED ADJUSTMENT 16 START UP AND OPERATION 16 MAINTENANCE SERVICE 19 FILTERS 19 EVAPORATOR AND CONDENSER COILS 19 BLOWERS 19 DRIVE BELTS 19 REFRIGERANT CIRCUIT S 19 Tables GENERAL UNIT INFORMATIO...

Page 3: ...ressure switches All models are equipped with an adjustable thermal expansion valve with external equalizer one valve per circuit Each refrigerant cir cuit is also equipped with a liquid line filter drier sight glass moisture indicator and service access ports An electrically re setable lock out relay will shut off the compressor in the event of pressure switch trip during operation Control circui...

Page 4: ... no leaks have occurred during shipment Install gauge set to high and low pressure ports to confirm pressure has been maintained and no leaks have occurred during shipment Repair any damage prior to installation to ensure safe operation NOTE Record any unit damage on the Bill of Lading and report to carrier and factory immediately Shipping and han dling damages are not warranty items RIGGING Units...

Page 5: ... these units outdoors or in any area where the surrounding temperature may drop below 32 degrees F LOCK ALL ELECTRICAL POWER SUPPLY SWITCHES IN THE OFF POSITION BEFORE INSTALLING THE UNIT FAILURE TO DISCON NECT POWER SUPPLY MAY RESULT IN ELEC TRICAL SHOCK OR EVEN DEATH WARNING Model CU060 CU096 CU120 CU180 CU240 CU300 Nominal Cooling Ton 5 8 10 15 20 25 Cooling Performance Gross Cooling Capacity B...

Page 6: ...036 33072 001 Rev A 0601 6 Unitary Products Group DIMENSIONAL DATA FIGURE 2 DIMENSIONS CU060 CU096 CU120 ...

Page 7: ...036 33072 001 Rev A 0601 Unitary Products Group 7 FIGURE 3 DIMENSIONS CU180 ...

Page 8: ...be provided on the water supply and return lines if noise and vibration trans mission could be a problem Water piping should include shutoff balancing valves so that the unit can be serviced without shutting down and draining the entire water supply circuit Since units are piped in paral lel piping circuits the shutoff valves may be used to equalixe the pressure drop to each branch for even conden...

Page 9: ...djusting screw clockwise will lower the opening point and lower the condensing pressure being maintained If mains water is being used make sure the valve closes soon after the compressor stops If the flow does not stop after a few minutes raise the opening pressure by turning the adjusting shaft caunter clockwise until the flow stops If the unit is running on mains water we recommend adjust ing th...

Page 10: ...036 33072 001 Rev A 0601 10 Unitary Products Group FIGURE 5 WATERSIDE PRESSURE DROP STANDARD UNIT MANIFOLDED CONDENSERS ...

Page 11: ...om the con ditioned space 5 15 ton models with optional return air grille or mechanical room 20 and 25 ton models If a ducted return is desired duct connection flanges may be secured directly to the air intake opening of the 5 through 15 ton units filters are accessible from the right hand side The filter frame on 20 and 25 ton models has duct attachment flanges incorporated into the filter rack S...

Page 12: ...tion In order to utilize the rear vertical or rear horizontal dis charge on 5 through 15 ton models the upper fan module must be rotated a Disconnect power wiring at motor terminal box b Remove corner connecting brackets which secure the blower module to the lower evaporator unit c Carefully lift the blower module and rotate 1800 Reposition the blower module on top of the evapora tor compressor un...

Page 13: ...s utilizing space or return air thermostatic controls A low volt age terminal block is provided for hook up of conventional or programmable thermostats The CU6300 25 ton models feature three independent com pressor stages A multi stage commercial thermostat ie Honeywell T7300 series or other type of multi step control ler is recommended for use with these models Alternatively two of the three comp...

Page 14: ...0 1800 64 65 31 20 25 23 80 40 30 CU240A 208 230 3 60 460 3 60 575 3 60 2 2 2 33 6 17 3 13 5 225 0 114 0 80 0 5 00 5 00 5 00 14 0 6 6 5 7 1800 1800 1800 89 60 45 53 36 08 110 60 45 CU300A 208 230 3 60 460 3 60 575 3 60 3 3 3 32 1 16 4 12 0 195 0 95 0 80 0 7 50 7 50 7 50 22 2 10 8 8 4 1800 1800 1800 126 53 64 10 47 40 150 80 50 MODEL VOLTAGE COMPRESSOR EVAPORATOR MIN CCT MAX FUSE QTY RLA LRA HP RLA...

Page 15: ... 77 760 1 91 797 2 05 837 2 21 878 2 38 919 2 54 960 2 70 1001 2 87 1040 3 05 CU180A 5400 645 1 52 709 1 79 770 2 06 829 2 35 885 2 65 939 2 96 991 3 28 1042 3 61 1092 3 96 1140 4 32 1190 4 71 6000 700 2 00 759 2 30 815 2 60 870 2 91 922 3 23 973 3 56 1022 3 90 1070 4 25 1116 4 62 1162 4 99 6600 761 2 63 815 2 94 867 3 26 917 3 60 966 3 94 1014 4 29 1060 4 66 1104 5 02 CU240A 7200 659 2 10 714 2 3...

Page 16: ...ll rotate in either direction depending upon phasing of the power Since there is a 50 50 chance of connecting power in such a way as to cause rota tion in the reverse direction it is important to ensure proper rotation direction is achieved when the system is installed and operated Verification of proper direction is made by observing that suc tion pressure drops and discharge pressure rises when ...

Page 17: ...rnal protector will trip If opposite rotation is needed disconnect and reverse any two leads of the three phase supply Reconnect power and observe for correct rotation Observe unit operation and check for unusual noise or vibra tion TABLE 6 REFRIGERANT CHARGES TABLE 7 PRESSURE SWITCH SETTINGS ALL Ref Charge 5 TON 8 TON 10 TON 15 TON 20 TON 25 TON No of Cir cuits 1 2 2 2 2 3 Per Circuit LB 4 625 4 ...

Page 18: ...036 33072 001 Rev A 0601 18 Unitary Products Group FIGURE 7 TYPICAL WIRING DIAGRAM 208 230V 3PH 60 HZ ...

Page 19: ...ew is properly set Check that the blower wheel is tight on the shaft and that the hub set screws are properly torqued DRIVE BELTS Examine belts periodically for wear Glazed areas on the drive surfaces indicate overheating due to belt slippage Ideal tension is the lowest tension at which the belt will not slip under peak load conditions Over tensioning shortens belt and bearing life The tension on ...

Page 20: ...ject to change without notice Printed in U S A 036 33072 001 Rev A 0601 Copyright by Unitary Products Group 2000 All rights reserved Supersedes Nothing Unitary 5005 Norman Product York OK Group Drive 73069 ...

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