Table 3 90MA/MF Physical Data -- Refrigerant 134a

 

 

 

 

 

 

 

 

 

 

 

 

R--134a -- English Units

 

R--134a -- Metric Units

BASE UNIT 90MA/MF

UNITS

308

 

312

 

308

 

312

 

English (Metric)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMINAL CAPACITY

Tons (kW)

5.5

 

8

 

19.3

 

28.1

OPERATING WEIGHT

 

 

 

 

 

 

 

 

Base Unit

Pounds (kg)

895

 

950

 

406

 

431

Discharge Plenum

Pounds (kg)

50

 

50

 

22.7

 

22.7

COMPRESSOR TYPE -- Reciprocating

 

Semi--

Hermetic

 

Semi--

Hermetic

Quantity of Cylinders

 

4

 

6

 

4

 

6

Quantity of Unloading Cylinders

 

0

 

2

 

0

 

2

Quantity of Capacity Steps

 

1

 

2

 

1

 

2

DISCHARGE PRESSURE SWITCH

 

 

 

 

 

 

 

 

Opens

psig (kPa)

 

335￿10

 

2310￿69

 

Closes

psig (kPa)

 

235￿20

 

1620￿138

 

SUCTION PRESSURE SWITCH

 

 

 

 

 

 

 

 

Opens

psig (kPa)

 

7￿3

 

48￿21

 

Closes

psig (kPa)

 

22￿5

 

152￿35

 

OPERATING CHARGE

pounds (kg)

11.2

 

10

 

5.1

 

4.5

CONDENSER

 

 

 

 

 

 

 

 

Number & Type

 

1....Tube In Tube

 

1....Tube In Tube

Water Volume

gallon (liter)

 

2.42

 

9.2

 

EVAPORATOR AIR FAN

 

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

Nominal Flow

cfm (m3/h)

3000

 

4000

 

4245

 

5660

Standard Speed Range

RPM

495--700

 

600--850

 

412--583

 

500--708

Maximum Allowable RPM

 

 

 

1050

 

 

 

Belt Quantity / Pulley Pitch Diameter

inches (cm)

1 / 8.5

 

1 / 7.0

 

1 / 21.6

 

1 / 17.8

Motor Pulley Pitch Diameter Range

inches (cm)

 

2.4 to 3.4

 

6.1 to 8.6

 

Motor Nominal Rating(@60 Hz)...Frame Size

 

 

 

 

 

 

 

 

Standard

horse power

1...56

 

2...56

 

.75 / 56

 

1.5 / 56

Alternate (See Note 1)

horse power

2...56

 

3...56

 

1.5 / 56

 

2.2 / 56

Alternate (See Note 1)

horse power

3...56

 

----

 

2.2 / 56

 

----

EVAPORATOR COIL

 

 

3/8

OD(0.95) cm, Copper

Tubes, Aluminum

Fins

 

Tube Type

 

 

 

Prime

 

 

 

Quantity of Rows...fin Spacing

fins/inch(cm)

 

3...12.5

 

3...14.9

 

Face Area

sq ft (sq m)

7.3

 

8.5

 

0.68

 

0.79

RETURN AIR FILTERS

 

 

 

Factory Supplied, Cleanable

 

Quantity...Size

inches (cm)

4...16 x 20 x 1

 

4...40.6 x 50.8 x 2.5

CONDENSER CONNECTIONS

 

 

 

 

 

 

 

 

Water Inlet (bottom) & Outlet (top)

inches FPT

1

 

1

 

1

 

1

Maximum Working Pressure (refrigerant side)

psig (kPa)

 

400

 

2758

 

CONDENSATE DRAIN CONNECTIONS

inches FPT

 

3/4

 

3/4

 

ACCESSORY HEATING COILS

 

 

 

 

 

 

 

 

HOT WATER

 

 

 

 

 

 

 

 

Quantity of Rows...fin spacing

fins/inch(cm)

2...14

 

2...14

 

2...5.5

 

2...5.5

Face Area

sq ft (m)

6

 

6

 

0.56

 

0.56

Water Inlet (top) & Outlet Connection (bottom)

inches (cm)

 

1--1/4

MPT

 

1--1/4

MPT

 

STEAM

 

 

 

 

 

 

 

 

Quantity of Rows...fin spacing

fins/inch(cm)

1...14

 

1...14

 

1...5.5

 

1...5.5

Face Area

sq ft (m)

6.9

 

6.9

 

0.64

 

0.64

Water Inlet (top) & Outlet Connection (bottom)

inches (cm)

 

1--1/4

MPT

 

1--1/4

MPT

 

LEGEND

 

 

 

 

 

 

 

 

FPT = Female Pipe Thread MPT = Male Pipe Thread

ODF = Outside Diameter Female

 

 

 

NOTES:

1.Motors and drives other than those furnished with unit must be purchased separately. Contact your Carrier Transicold represen- tative.

62--10458--00

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Carrier 90MA/MF/MU manual Base Unit 90MA/MF Units

90MA/MF/MU specifications

The Carrier 90MA/MF/MU series represents a significant advancement in HVAC technology, designed for commercial applications needing reliability, efficiency, and precision in climate control. These units are renowned for their ability to cater to varying thermal loads while minimizing energy consumption, making them an ideal choice for various settings including offices, retail spaces, and industrial facilities.

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