Carrier 90MU, 90MA specifications FPT = Female Pipe Thread MPT = Male Pipe Thread

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TABLE 1B - 90MA/MU PHYSICAL DATA – R-407C , ENGLISH UNITS (See Table 2B for SI units)

 

BASE UNIT (90MA/MU)

 

UNITS

404

 

406

 

408

 

412

 

NOMINAL CAPACITY

 

Tons

3

 

5

 

7.5

 

10

 

REFRIGERANT

 

 

 

 

 

R-

407C

 

 

OPERATING WEIGHT

 

 

 

 

 

 

 

 

 

 

 

Base unit 90MA

 

Pounds

390

 

427

 

895

 

950

 

 

Base Unit 90MU

 

Pounds

330

 

360

 

835

 

890

 

 

Discharge Plenum

 

Pounds

25

 

25

 

50

 

50

 

COMPRESSOR TYPE

 

 

 

Scroll

 

Semi-Hermetic, Recip

 

 

Qty Cylinders

 

 

 

N/

 

4

 

6

 

 

Qty Unloading Cylinders

 

 

 

N/

 

0

 

2

 

 

Qty Capacity Steps

 

 

 

1

 

1

 

2

 

DISCHARGE

PRESSURE SWITCH

 

 

 

 

 

 

 

 

 

 

 

Opens (90MA)

 

PSIG

 

 

395+/

-10

 

 

 

 

Closes (90MA)

 

PSIG

 

295+/-10

 

 

 

 

Opens (90MU)

 

PSIG

 

 

 

426+/-7

 

 

 

 

Closes (90MU)

 

PSIG

 

320+/-20

 

 

 

SUCTION

PRESSURE SWITCH

 

 

 

 

 

 

 

 

 

 

 

Opens

 

PSIG

 

 

 

27+/-4

 

 

 

 

Closes

 

PSIG

 

 

 

67+/-4

 

 

 

REFRIGERANT

 

 

 

 

 

 

 

 

 

 

 

Typ

 

 

 

 

 

R-

407C

 

 

 

Qty (90MA ONLY))

 

Pounds

3.1

 

5.3

 

11.2

 

10.0

 

CONDENSER

(90MA ONLY)

 

 

 

 

 

 

 

 

 

 

 

Number...Type

 

 

 

 

1…Tube

in Tube

 

 

 

 

Water Volume

 

Gallons

0.39

 

0.86

 

2.42

 

 

EVAPORATOR AIR FAN

 

 

Adjustable, Belt Driven Centrifugal: 1750 RPM Motor @ 60hz

 

 

Nominal Flow

 

CFM

1200

 

2000

 

3000

 

4000

 

 

Standard Speed Range

 

RPM

647-914

 

647-915

 

487-690

 

591-838

 

 

Maximum Allowable Speed

 

RPM

 

 

 

1250

 

 

 

 

Belt Qty/Pulley Pitch Diameter

 

Inches

1 / 6.4

 

1 / 6.4

 

1 / 8.5

 

1 / 7.0

 

 

Motor Pulley Pitch Diameter Range

 

Inches

 

 

2.4 to 3.4 inches

 

 

 

Motor Nominal Rating (@ 60Hz)…Frame Size

 

 

 

 

 

 

 

 

 

 

 

Standard

 

HP

1/3…56

 

3/4…56

 

1…56

 

2…56

 

 

Alternate (SeeNote 1)

 

HP

3/4…56

 

1…56

 

2…56

 

3…56

 

 

Alternate (See Note 1)

 

HP

N/

 

N/

 

3…56

 

N/

 

EVAPORATOR COIL

 

 

 

3/8 OD, Copper Tubes, Aluminum Fin

 

 

 

Tube

 

 

 

 

 

Prime

 

 

 

Qty Rows…Fin Spacing

Fins/Inch

2…14.4

 

3…14.4

 

3…12.5

 

 

 

Face Area

 

Sq Ft

5

 

5

 

7.3

 

8.5

 

RETURN

AIR FILTERS

 

 

 

 

Factory Supplied, Cleanable

 

 

 

Qty…Size

 

Inches

2…16 x 25 x 1

 

4…16 x 20 x 1

 

CONDENSER

CONNECTIONS (90MA ONLY)

 

 

 

 

 

 

 

 

 

 

 

Water Inlet (bottom)

Inches FPT

1/2

 

3/4

 

1

 

1

 

 

Water Outler (top)

Inches FPT

1/2

 

3/4

 

1

 

1

 

 

Maximum Working Pressure (Refrigerant Side)

 

PSIG

 

 

 

400

 

 

 

CONDENSATE DRAIN CONNECTIONS

Inches FPT

 

 

 

3/4

 

 

 

ACCESSORY ELECTRIC HEAT

 

 

 

 

 

 

 

 

 

 

 

Capacity @ 460 volts

 

Watts

 

5.25

 

17.5

 

 

 

Capacity @ 400 volts

 

Watts

 

4.03

 

13.4

 

 

 

Number of Electric Heat Stages

 

 

 

1

 

2

 

LEGEND

 

 

 

 

 

 

 

 

 

FPT = Female Pipe Thread MPT = Male Pipe Thread

ODF = Outside Diameter Female

 

 

 

 

NOTES:

1. Motors other than those furnished with unit must be purchased separately. Contact your Carrier Marine representative

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations

Printed in U.S.A.

Pg 3

90MA-3SI SUPERCEDES FORM 62-02971-00 09-2009

 

 

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Contents Installation, Operation and Service Instructions Single-PackageMarine Cooling UnitsCOMPONENT ARRANGEMENT - *04/*06 COMPONENT ARRANGEMENT - *08/*12ODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe ThreadFPT = Female Pipe Thread MPT = Male Pipe Thread Page ODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe ThreadODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe ThreadFPT = Female Pipe Thread MPT = Male Pipe Thread TYPICAL UNIT SHOWN FIGURE 2 - UNIT DIMENSIONSStep 4 - Rig and Place Unit FIGURE 1 - BASE UNIT INTERIOR DETAILSFIGURE 5 - TYPICAL CONDENSER WATER PIPING FIGURE 3 - HORIZONTAL WHEEL CENTERINGFIGURE 4 - CONCENTRIC WHEEL ALIGNMENT Step 10 - Make Condenser ConnectionsFIGURE 6 - CONNECTION LOCATIONS FIGURE 7 - CONDENSATE DRAIN TRAP To Shut Down Unit OPERATIONStep 12 - Make Electrical Connections To start unitSERVICE FIGURE 8 - FAN PULLEY ADJUSTMENTReturn-AirGrille Removal Water Regulating Valve FIGURE 9 - GRAVITY FLOW METHODFIGURE 10 - FORCED CIRCULATION METHOD Charging the System 90MU R-407C, R-404A,and R-134aunits FIGURE 12 WIRING SCHEMATIC - 90MA/MU*04/*06 FOR NOTES AND LEGEND, SEE FIGURE90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM FIGURE 13 COMPONENT ARRANGEMENT - 90MA/MU*04/*06FIGURE 14 - ELECTRICAL SCHEMATIC - 90MA/MU*08/*12 FOR NOTES AND LEGEND, SEE FIGURE90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM