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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 3
TABLE 1B - 90MA/MU PHYSICAL DATA – R-407C , ENGLISH UNITS (See Table 2B 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 404 406 408 412
NOMINAL CAPACITY
Tons 3 5 7.5 10
REFRIGERANT
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
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 3.1 5.3 11.2 10.0
CONDENSER (90MA ONLY)
Number...Type
Water Volume Gallons 0.39 0.86
EVAPORATOR AIR FAN
Nominal Flow CFM 1200 2000 3000 4000
Standard Speed Range
RPM 647-914 647-915 487-690 591-838
Maximum Allowable Speed
RPM
Belt Qty/Pulley Pitch Diamete
r
Inches 1 / 6.4 1 / 6.4 1 / 8.5 1 / 7.0
Motor Pulley Pitch Diameter Range
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
Tube
Qty Rows…Fin Spacing
Fins/Inch 2…14.4 3…14.4
Face Area
Sq Ft 5 5 7.3 8.5
RETURN AIR FILTERS
Qty…Size Inches
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
CONDENSATE DRAIN CONNECTIONS
Inches FPT
ACCESSORY ELECTRIC HEAT
Capacity @ 460 volts Watts
Capacity @ 400 volts
Watts
Number of Electric Heat Stages
1
R-407C
395+/-10
295+/-10
426+/-7
320+/-20
N/
N/
R-407C
Scroll Semi-Hermetic, Recip
27+/-4
67+/-4
1…Tube in Tube
3/8 OD, Copper Tubes, Aluminum Fin
Prime
2.42
Adjustable, Belt Driven Centrifugal: 1750 RPM Motor @ 60hz
1250
3…12.5
Factory Supplied, Cleanable
2…16 x 25 x 1 4…16 x 20 x 1
2.4 to 3.4 inches
17.5
13.44.03
400
3/4
5.25
1 2