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Table 1 — Physical Data
UNIT 50EJ,EK,EW,EY 024 028 030 034
NOMINAL CAPACITY (tons) 20 25 27 30
OPERATING WEIGHT (lb)*
Unit
Al/Al† 4016 4102 4102 4102
Al/Cu† 4236 4322 4322 4322
Roof Curb (14-in. curb) 365 365 365 365
COMPRESSOR
Type Ckt 1 06D328 06D328 06D537 06D537
Ckt 2 06D818 06D328 06D328 06D537
Number of Refrigerant Circuits 22 2 2
Oil (oz) (Ckt1, Ckt 2) 115, 88 115 ea. 115 ea. 115 ea.
REFRIGERANT TYPE R-22
Operating Charge (lb-oz)
Circuit 1** 25-0 25-0 25-0 25-0
Circuit 2 31-0 25-0 25-0 25-0
CONDENSER COIL Cross-Hatched
3
⁄
8
Љ Copper Tubes, Aluminum Lanced or Copper Fins
Quantity 11 1 1
Rows...Fins/in. 4...15 4...15 4...15 4...15
Total Face Area (sq ft) 33.3 33.3 33.3 33.3
CONDENSER FAN Propeller Type
Nominal Cfm 13,420 13,420 13,420 13,420
Quantity...Diameter (in.) 2...30 2...30 2...30 2...30
Motor Hp (1075 Rpm) 11 1 1
EVAPORATOR COIL Cross-Hatched
3
⁄
8
Љ Copper Tubes, Aluminum or Copper Plate Fins, Intertwined Circuits
Rows...Fins/in. 4...15 4...15 4...15 4...15
Total Face Area (sq ft) 31.7 31.7 31.7 31.7
EVAPORATOR FAN Centrifugal Type
Quantity...Size (in.) 2...20x15 2...20x15 2...20x15 2..20x15
Type Drive Belt Belt Belt Belt
Nominal Cfm 8,000 10,000 11,000 12,000
Motor Hp 5 10†† 15 7.5 10†† 15 10 15†† 20 10 15†† 20
Motor Frame Size S184T S215T S254T S213T S215T S254T S215T S254T S256T S215T S254T S256T
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 1200 1200 1200 1200
Motor Pulley Pitch Diameter 4.6 6.6 6.9 4.9 6.1 7.1 6.6 6.7 7.5 6.4 6.9 7.5
Nominal Motor Shaft Diameter (in.) 1
1
⁄
8
1
3
⁄
8
1
5
⁄
8
1
3
⁄
8
1
3
⁄
8
1
5
⁄
8
1
3
⁄
8
1
5
⁄
8
1
5
⁄
8
1
3
⁄
8
1
5
⁄
8
1
5
⁄
8
Fan Pulley Pitch Diameter (in.) 11.1 12.5 11.1 11.1 11.1 11.1 13.7 11.1 11.1 12.5 11.1 11.1
Nominal Fan Shaft Diameter (in.) 1
11
⁄
16
1
11
⁄
16
1
11
⁄
16
1
11
⁄
16
Belt, Quantity...Type 1...BX59 1...BX60 1...5VX590 1...BX56 1...BX56 1...5VX590 1...BX62 1...5VX590 1...5VX600 1...BX60 1...5VX590 1...5VX600
Belt, Length (in.) 62 63 59 59 59 59 65 59 60 63 59 60
Pulley Center Line Distance (in.) 16.0-18.7 15.6-18.4 15.0-17.9 15.6-18.4 15.6-18.4 15.0-17.9 15.6-18.4 15.0-17.9 15.6-18.4 15.0-17.9
Factory Speed Setting (rpm) 725 924 1088 773 962 1119 843 1056 1182 896 1088 1182
HIGH-PRESSURE SWITCH (psig)
Cutout 426 426 426 426
Reset (Auto.) 320 320 320 320
LOW-PRESSURE SWITCH (psig)
Cutout 77 7 7
Reset (Auto.) 22 22 22 22
RETURN-AIR FILTERS
Quantity...Size (in.) 10...20x24x2 10...20x24x2 10...20x24x2 10...20x24x2
OUTDOOR-AIR FILTERS 8...16x25 8...16x25 8...16x25 8...16x25
Quantity...Size (in.) 4...20x25 4...20x25 4...20x25 4...20x25
POWER EXHAUST Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired For High Speed) and Forward Curved Fan
Motor, Quantity...Hp 4...1
Fan, Diameter...Width (in.) 11...10
LEGEND
Al — Aluminum
Cu — Copper
*Weightofunit doesnotinclude variablefrequency drive(VFD),barometric relief,or power
exhaust. If a VAV unit (a VFD is installed), add the VFD weight in the table at right.
†Evaporator coil fin material/condenser coil fin material.
**Sizes024-034: Circuit1 usesthelower portionof condensercoil, Circuit2 usesthe upper
portion. Sizes 038-048:Circuit 1 usesthe left condensercoil, Circuit 2 theright.All units
have intertwined evaporator coils.
††Motor and driveshown will deliver approximately 2.5in. wg net externalstatic. For more
drive information, see Table 2.
NOTES:
1. See Table 2 for evaporator fan motor data.
2. Sizes 038 and 048 are 50EJ,EW units only.
VFD
(Hp)
VFD WEIGHTS (lb)
208/230 v 460 v 575 v
5 20 22 60
7.5 51 37 64
10 51 61 64
15 61 63 109
20 63 111 109
25 105 112 174
30 172 118 180
9