Carrier 90MU, 90MA FPT = Female Pipe Thread MPT = Male Pipe Thread, ODF = Outside Diameter Female

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TABLE 2A - 90MA/MU PHYSICAL DATA – R-134A , SI UNITS

BASE UNIT (90MA/MU)

UNITS

308

 

312

NOMINAL CAPACITY

kW

19.3

 

28.1

REFRIGERANT

 

 

R-

 

OPERATING WEIGHT

 

 

 

 

 

Base unit 90MA

kg

406

 

431

 

Base Unit 90MU

kg

N/

 

N/

 

Discharge Plenum

kg

22.7

 

22.7

COMPRESSOR TYPE

 

 

Semi-Hermetic, Recip

 

Qty Cylinders

 

4

 

6

 

Qty Unloading Cylinders

 

0

 

2

 

Qty Capacity Steps

 

1

 

2

DISCHARGE

PRESSURE SWITCH

 

 

 

 

 

Opens (90MA)

kPa

 

2310+/-69

 

Closes (90MA)

kPa

 

1620+/-138

 

Opens (90MU)

kPa

 

N/

 

Closes (90MU)

kPa

 

N/

SUCTION

PRESSURE SWITCH

 

 

 

 

 

Opens

kPa

 

48+/

-12

 

Closes

kPa

 

152+/-35

REFRIGERANT

 

 

 

 

 

Typ

 

 

R-

 

 

Qty (90MA ONLY))

kg

5.1

 

4.5

CONDENSER (90MA ONLY)

 

 

 

 

 

Number...Type

 

 

1…Tube

in Tube

 

Water Volume

Liter

 

9.2

EVAPORATOR AIR FAN

 

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

 

Nominal Flow

m3/hr

4245

 

5660

 

Standard Speed Range

RPM

402-570

 

488-692

 

Maximum Allowable Speed

RPM

 

1250

 

Belt Qty/Pulley Pitch Diameter

cm

1 / 21.6

 

1 / 17.8

 

Motor Pulley Pitch Diameter Range

cm

 

6.1 to

8.6 cm

 

Motor Nominal Rating (@ 60Hz)…Frame Size

 

 

 

 

 

Standard

kW

0.75…56

 

1.5…56

 

Alternate (SeeNote 1)

kW

1.5…56

 

2.2…56

 

Alternate (See Note 1)

kW

2.2…56

 

N/

EVAPORATOR COIL

 

3/8 OD, Copper Tubes, Aluminum Fin

 

Tube

 

 

Prime

 

Qty Rows…Fin Spacing

Fins/cm

 

3…4.9

 

Face Area

m2

0.68

 

0.79

RETURN

AIR FILTERS

 

Factory Supplied, Cleanable

 

Qty…Size

cm

 

4…40.6 x 50.8 x 2.5

CONDENSER CONNECTIONS (90MA ONLY)

 

 

 

 

 

Water Inlet (bottom)

Inches FPT

1

 

1

 

Water Outler (top)

Inches FPT

1

 

1

 

Maximum Working Pressure (Refrigerant Side)

kPa

 

2758

CONDENSATE DRAIN CONNECTIONS

Inches FPT

 

3/4

ACCESSORY ELECTRIC HEAT

 

 

 

 

 

Capacity @ 460 volts

kW

 

17.5

 

Capacity @ 400 volts

kW

 

13.4

 

Number of Electric Heat Stages

 

 

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 5

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

 

 

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Contents COMPONENT ARRANGEMENT - *04/*06 Single-PackageMarine Cooling UnitsCOMPONENT ARRANGEMENT - *08/*12 Installation, Operation and Service InstructionsODF = 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 Step 4 - Rig and Place Unit FIGURE 2 - UNIT DIMENSIONSFIGURE 1 - BASE UNIT INTERIOR DETAILS TYPICAL UNIT SHOWNFIGURE 4 - CONCENTRIC WHEEL ALIGNMENT FIGURE 3 - HORIZONTAL WHEEL CENTERINGStep 10 - Make Condenser Connections FIGURE 5 - TYPICAL CONDENSER WATER PIPINGFIGURE 6 - CONNECTION LOCATIONS FIGURE 7 - CONDENSATE DRAIN TRAP Step 12 - Make Electrical Connections OPERATIONTo start unit To Shut Down UnitReturn-AirGrille Removal SERVICEFIGURE 8 - FAN PULLEY ADJUSTMENT FIGURE 10 - FORCED CIRCULATION METHOD Water Regulating ValveFIGURE 9 - GRAVITY FLOW METHOD Charging the System 90MU R-407C, R-404A,and R-134aunits 90MA-3SISUPERCEDES FORM FIGURE 12 WIRING SCHEMATIC - 90MA/MU*04/*06FOR NOTES AND LEGEND, SEE FIGURE 90MA-3SISUPERCEDES FORM FIGURE 13 COMPONENT ARRANGEMENT - 90MA/MU*04/*0690MA-3SISUPERCEDES FORM FIGURE 14 - ELECTRICAL SCHEMATIC - 90MA/MU*08/*12FOR NOTES AND LEGEND, SEE FIGURE 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM