7
Table 1 — Physical Data (cont)
LEGEND
UNIT 50HG 024 028
VOLTAGE
208/230
and 460
575 ALL
NOMINAL CAPACITY (Tons)
20 20 25
OPERATING WEIGHT (lb)
50 SERIES (Cooling Only)
2187 2187 2446
COMPRESSOR
Quantity
33 2
Number of Refrigerant Circuits
33 2
Oil (ounces) Ckt A...Ckt B...Ckt C
72...72...72 72...72...72 110...110...NA
REFRIGERANT TYPE
R-22
Expansion Device
TXV TXV TXV
OperatingCharge (lb)
Circuit A
13.8 13.8 23.9
Circuit B
13.9 13.9 21.5
Circuit C
15.5 15.5 NA
CONDENSER COIL
Rows...Fins/inch
2...17 2...17 2...17
TotalFaceArea(sq.ft)
57.78 57.78 66.67
CONDENSER FAN
Nominal Cfm (Total, all fans)
14,000 14,000 21,000
Quantity...Diameter (in.)
4...22 4...22 6...22
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts input (Total)
1400 1400 2100
EVAPORATOR COIL
Face Split
Rows...Fins/inch
4...15 4...15 4...15
TotalFaceArea(sq.ft)
23.33 23.33 27.22
EVAPORATOR FAN
Quantity...Size
2...15x11 2...15x11 2...15x11
Type Drive
Belt Belt Belt
Nominal Cfm
8000 8000 10,000
Std Motor Hp
557
1
/
2
Alt Motor Hp
7
1
/
2
7
1
/
2
10
Motor NominalRpm
1725 1725 1725
Std Maximum Continuous Bhp
5.75 5.75 8.63
Std Maximum Continuous Watts
4290 4290 6438
Alt Maximum Continuous Bhp
8.63 8.63 11.50
Alt Maximum Continuous Watts
6438 6438 8579
Motor Frame Size Standard
S184T 184T S213T
Motor Frame Size Alternate
S213T S213T S215T
Fan Drive Rpm Range Std motor/Std drive
658-808 658-808 799-965
Std motor/Alt drive
794-974 794-974 939-1152
Altmotor/Std drive
949-1145 949-1145 945-1187
Altmotor/Altdrive
1126-1328 1126-1328 1152-1366
Motor Bearing Type
Ball Ball Ball
Maximum Allowable Rpm
1400 1400 1400
Motor Pulley Pitch Diameter Std motor/Std drive
4.3-5.3 4.3-5.3 5.4-6.6
Std motor/Alt drive
4.3-5.3 4.3-5.3 4.2-5.2
Altmotor/Std drive
5.4-6.6 5.4-6.6 4.2-5.2
Altmotor/Altdrive
5.5-6.5 5.5-6.5 5.2-6.2
Motor Shaft Diameter (in.) Standard
1
1
/
8
1
1
/
8
1
3
/
8
Motor Shaft Diameter (in.) Alternate
1
3
/
8
1
3
/
8
1
3
/
8
Belt, Quantity...Type...Length (in.) Std motor/Std drive
1...BX...46 1...BX...46 1...BX...50
Std motor/Alt drive
1...BX...42 1...BX...42 2...AX...38
Altmotor/Std drive
1...BX...46 1...BX...46 2...BX...38
Altmotor/Altdrive
1...BX...42 1...BX...42 2...BX...38
Pulley center line distance (in.)
10.0-12.2 10.0-12.2 9.6-12.0
Speed changeper fullturn of moveable
pulley flange(rpm) Std motor/Std drive
25 25 28
Std motor/Alt drive
30 30 36
Altmotor/Std drive
33 33 40
Altmotor/Altdrive
34 34 36
Moveable pulley maximum (full turns
66 6
from closed position)
Factory Pulley Setting
(turns from closed position)
33 3
Fan Shaft Diameter (in.)
1
3
/
16
1
3
/
16
1
3
/
16
Factory Speed Setting (rpm)
733 733 882
HIGH PRESSURE SWITCHES(psig)
Cutout
426 426 426
Reset (Auto)
320 320 320
OUTDOOR AIR INLET SCREENS
Quantity...Size (in.)
3...20x25 3...20x25 3...20x25
RETURN AIR FILTERS
Quantity...Size (in.)
9...16x25 9...16x25 9...20x25
Bhp —
Brake Horsepower
TXV —
Thermostatic Expansion Valve
