Specifications

Table 1A — Physical Data, Constant Volume Units
UNIT 50 DJ024 DW024 DJ028 DW028 DJ030 DW030
OPERATING WEIGHT (lb)* 2440 2650 2900 3100 2930 3140
COMPRESSORS (2 each unit) Semi-Hermetic, 06D Type, 1750 Rpm
Capacity Steps (%)
Standard 62, 100 60, 100 55, 100
Accessory 21, 42, 62, 80, 100 20, 40, 60, 80, 100 18, 37, 55, 65, 83, 100
REFRIGERANT R-22, Controlled by Thermostatic Expansion Valve
Operating Charge (lb), Circuit 1/Circuit 2 23.1/18.1 22.6/16.3 22.3/18.3
CONDENSER COILS 3-Row,
3
⁄ 8 -in. Tube Diameter
Face Area (sq ft) 24.75
Fins Per in.
Al 17.0 19.0 19.0
Cu 15.7 17.5 17.5
EVAPORATOR COILS 4-Row,
1
⁄ 2 -in. Tube Diameter
Face Area (sq ft) 20.1 23.4 23.4
Fins Per in. 15 15 15
CONDENSER FANS (2 each unit) Propeller Type, 30-in. Diameter, 1140 Rpm
Nominal Cfm 10,000 13,000 15,000
Nominal Hp
3
⁄ 4 (208/230, 460 v);
1 (575 v)
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EVAPORATOR FANS (1 each unit)† Centrifugal Type, 18 x 15-in., Service Factor 1.15
Nominal Cfm 8,000 10,000 10,800
Maximum Allowable Cfm 10,000 12,500 12,500
Maximum Allowable Rpm 1,200 1,200 1,200
Standard Motor and Drive 1.438-in. Fan Pulley Bore
Motor Hp 57
1
⁄ 2 10
Full Load Efficiency (%)
Standard 84.3 84.8 87.4
High 86.5 88.5 89.5
Motor Frame Size 184T 213T 215T
Fan Pulley Pitch Diameter (in.) 10.6 8.0 8.0
Motor Pulley Pitch Diameter (in.) 4.75 4.12 4.50
Resulting Fan Rpm 780 900 980
Optional Motor and Drive 1.438-in. Fan Pulley Bore
Motor Hp 7
1
⁄ 2 10 15
Full Load Efficiency (%)
Standard 84.8 87.4 85.7
High 88.5 89.5 90.0
Motor Frame Size 213T 215T 254T
Fan Pulley Pitch Diameter (in.) 8.0 8.0 8.0
Motor Pulley Pitch Diameter (in.) 4.12 4.50 5.00
Resulting Fan Rpm 900 980 1090
OPTIONAL POWER EXHAUST** Propeller Type, 1140 Rpm
Motors...Hp 1...1
NA
1...1
NA
1...1
NA
Fans...Diam (in.) 1...24 1...30 1...30
FILTERS¶ (Quantity...L xWxD) Throwaway
20% Standard Efficiency
2...18 x 24 x 2 2...18 x 24 x 2 2...18 x 24 x 2
4...24 x 24 x 2 6...20 x 24 x 2 6...20 x 24 x 2
LEGEND
Al — Aluminum
Cu — Copper
*Weights do not include economizer. See Fig. 1 for economizer weights.
†Standard fan motor is supplied with standard fan drive and belts.
Optional fan motor is supplied with optional fan drive, pulleys, and
belts. Other combinations are field supplied.
**Optional unit-mounted power exhaust not available (NA) on 50DW
units.Accessory constant volume power exhaust may be duct mounted
on 50DW installation.
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