Specifications - SWUD 20

General Data

Compressors       Evaporator Coil Economizer Coil
No. Hp Capacity Steps % Gross EER Face Area Face Area
Row Sq Ft FPF Type Row Sq Ft FPF
2 10 100, 53, 0 9.7 2 21.8 144 2 Row 2 21.8 168
              4 Row 4 21 .8 108
Fan Unit Weight     Filters
No. Size Base Unit With 2 Row Economizer With 4 Row Economizer Refrigerant Charge Quantity Size
1 16.5" 3180 3310 3510 48 Lbs 4 20 x 18 x 2
            4 20 x 20 x2

Notes:

1. Compressors are Trane 3D™ scroll.

2. EER based on 80/67 degrees F to the evaporator coil, nominal airflow, and 85-95 degree condenser water.

3. All units operate with R-22. Unit ships with full operating charge.

4. Shipping weights will exceed weights in table by approximately 150 lbs.

5. Unit weights include inlet guide vanes and controls, full refrigerant charge, and valves on units with waterside economizer.

6. SWUD 20 does not have enhanced capacity refrigerant tubes.

Electrical Data

Compressors (Each)

200 V

230 V

460 V

575V
Hp Kw RLA LRA RLA LRA RLA LRA RLA LRA
10 10.9 33.0 213 35.0 247 14.5 95 11.5 76
Evaporator Fan Motors Hp Kw FLA LRA FLA LRA FLA LRA FLA LRA
5 4.7 18.0 105 15.2 91 7.6 46 6.1 37
7.5 6.6 25.3 152 22.0 132 11.0 66 9.0 54
10 8.6 32.2 193 28.0 168 14.0 84 11.0 66
15 13.2 48.3 290 42.0 252 21.0 126 17.0 102
20 17.2 62.1 373 54.0 324 27.0 162 22.0 132
25 21.2 78.2 469 68.0 408 34.0 204 27.0 162

Notes:

RLA - Rated load amps

Compressor LRA - Locked rotor amps

Fan Motor LRA - Locked rotor amps, N.E.C. Table 430 - 151

FLA - Full load amps, N.E.C. Table 430 - 150

Compressor KW - Based on 80/70 degrees F to evaporator coil, nominal airflow, and 105 degrees F condensing temperature, 3 phase, 60 Hertz

Fan Motor KW - Based on rated motor horsepower, 3 phase, 60 Hertz Voltage utilization range is + 10 percent

Determination of minimum circuit ampacity (MCA).

MCA 1.25 x largest motor amps (FLA or RLA) + the sum of the remaining motor amps.

Determination of maximum fuse size (MFS) and maximum circuit breaker size (MCB). When compressor is largest load:

MFS and MCB = 2.25 x largest compressor RLA + the sum of the remaining compressor RLA!s + supply fan (FLA).

When supply fan is largest load:

MFS and MCB = 4.0 x supply fan FLA + the sum of the remaining compressor RLxs.

NOTE: Maximum fuse size is for non-time delay fuses.

Electrical Data

Electric Heat Kw 208 V 480 V
Amps Amps
  18.0 50 21.7

Note:

Electric heat amperage should not be considered when determining minimum circuit ampacity. The current of the unit in the heating mode will not exceed the current of the unit in the cooling mode.

Unit Operating Limits

Max. fan Rpm Max. fan Motor Hp Design Airflow Min. Gpm  

Max Gpm

 Min. Water Temp. Maximum Waterside Pressure
Maximum Cfm Minimum Cfm With Econ Without Econ Without Valve With Valve
1505 25 8500 6325 41 36 80 55 F 35 F 400 PSI

Note : Maximum Cfm limits are set to prevent moisture carryover on the evaporator coil. Minimum Cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.