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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. 90MA-3SI SUPERCEDES FORM 62-02971-00 09-2009
Pg 2
TABLE 1A - 90MA/MU PHYSICAL DATA – R-134A , ENGLISH UNITS (See Table 2A for SI units)
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
BASE UNIT (90MA/MU) UNITS 308 312
NOMINAL CAPACITY
Tons 5.5 8
REFRIGERANT
OPERATING WEIGHT
Base unit 90MA Pounds 895 950
Base Unit 90MU
Pounds N/ N/
Discharge Plenum
Pounds 50 50
COMPRESSOR TYPE
Qty Cylinders 4 6
Qty Unloading Cylinders
0 2
Qty Capacity Steps
1 2
DISCHARGE PRESSURE SWITCH
Opens (90MA) PSIG
Closes (90MA)
PSIG
Opens (90MU)
PSIG
Closes (90MU)
PSIG
SUCTION PRESSURE SWITCH
Opens PSIG
Closes
PSIG
REFRIGERANT
Typ
Qty (90MA ONLY))
Pounds 11.2 10
CONDENSER (90MA ONLY)
Number...Type
Water Volume Gallons
EVAPORATOR AIR FAN
Nominal Flow CFM 3000 4000
Standard Speed Range
RPM 487-690 591-838
Maximum Allowable Speed
RPM
Belt Qty/Pulley Pitch Diamete
r
Inches 1 / 8.5 1 / 7.0
Motor Pulley Pitch Diameter Range
Inches
Motor Nominal Rating (@ 60Hz)…Frame Size
Standard
HP 1…56 2…56
Alternate (SeeNote 1)
HP 2…56 3…56
Alternate (See Note 1)
HP 3…56 N/
EVAPORATOR COIL
Tube
Qty Rows…Fin Spacing
Fins/Inch
Face Area
Sq Ft 7.3 8.5
RETURN AIR FILTERS
Qty…Size Inches
CONDENSER CONNECTIONS (90MA ONLY)
Water Inlet (bottom) Inches FPT 1 1
Water Outler (top)
Inches FPT 1 1
Maximum Working Pressure (Refrigerant Side) PSIG
CONDENSATE DRAIN CONNECTIONS
Inches FPT
ACCESSORY ELECTRIC HEAT
Capacity @ 460 volts Watts
Capacity @ 400 volts
Watts
Number of Electric Heat Stages
R-
R-
Semi-Hermetic, Recip
1…Tube in Tube
1250
Adjustable, Belt Driven Centrifugal: 1750 RPM Motor@ 60hz
7+/-3
22+/-5
2.42
335+/-10
235+/-10
N/
N/
2.4 to 3.4 inches
3/8 OD, Copper Tubes, Aluminum Fin
3…12.5
Prime
Factory Supplied, Cleanable
4…16 x 20 x 1
17.5
13.4
2
400
3/4