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6
Table 1 — Physical Data
LEGEND
*Evaporator coil fin material/condenser coil fin material.
†Weight of 14-in. roof curb.
**Circuit 1 uses the lower portion of condenser coil and lower portion of evap-
orator coils, and Circuit 2 uses the upper portion of both coils.
††Due to belt and pulley style, pulley cannot be set from 0 to 1
1
/
2
turns open.
UNIT 50HJ
015
017
025
UNIT VOLTAGE
208/230 460
575
208/230
460
575
208
230 and 460
575
NOMINAL CAPACITY (tons)
12
15
20
OPERATING WEIGHT (lb)
Unit
Al/Al*
1575
1650
1750
Al/Cu*
1725
1800
1900
Cu/Cu*
1855
1930
2030
EconoMi$er
80
80
80
Roof Curb†
200
200
200
MoistureMiser Dehumidification Package
40
40
40
COMPRESSOR
Quantity...Model (Ckt 1, Ckt 2)
1...ZR72KC, 1...ZR57KC
1...ZR94KC, 1...ZR72KC
1...ZR125KC, 1...ZR108KC
Number of Refrigerant Circuits
2
2
2
Crankcase Heater Watts
70
70
70
Loading (% of Full Capacity)
0, 56, 100
0, 60, 100
0, 60, 100
Oil (oz) (Ckt 1, Ckt 2)
60, 66
85, 60
110, 110
REFRIGERANT TYPE
R-22
Expansion Device
TXV
Operating Charge (lb)**
Circuit 1
20.7
19.5
18.5
Circuit 2
11.9
13.45
13.3
CONDENSER COIL
Cross-Hatched
3
/
8
-in. Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated,
or Copper Plate Fins
Rows...Fins/in.
4...15
4...15
4...15
Total Face Area (sq ft)
21.7
21.7
21.7
CONDENSER FAN
Propeller Type
Nominal Cfm
10,500
10,500
14,200
Quantity...Diameter (in.)
322
3...22
2...30
Motor Hp...Rpm
1
/
2
...1050
1
/
2
...1050
1...1075
Watts Input (Total)
1100
1100
3400
EVAPORATOR COIL
Cross-Hatched
3
/
8
-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split
Rows...Fins/in.
4...15
4...15
4...15
Total Face Area (sq ft)
17.5
17.5
17.5
EVAPORATOR FAN
Centrifugal Type
Quantity...Size (in.)
2...10 x 10
2...12 x 12
2...12 x 12
Type Drive
Belt
Belt
Belt
Nominal Cfm
5200
6000
8000
Std Motor Hp
2.9
3.0
5
7.5
Opt Motor Hp
3.7
N/A
Motor Nominal Rpm
1725
1745
1745
Std Maximum Continuous Bhp
3.13
3.38
6.13
9.47
10.33
9.47
Opt Maximum Continuous Bhp
4.38
N/A
N/A
N/A
Motor Frame Size
56H
184T
213T
Fan Rpm Range
Low-Medium Static
834-1064
1105-1321
873-1021
1002 -1151
High Static
1161-1426
N/A
1025-1200
1193-1369
Motor Bearing Type
Ball
Ball
Ball
Maximum Allowable Rpm
1,550
1,550
1,550
Motor Pulley Pitch Dia.
Low-Medium Static
3.1/4.1
4.3/5.3
4.9/5.9
5.4/6.6
High Static
3.7/4.7
N/A
4.9/5.9
5.4/6.6
Nominal Motor Shaft Diameter (in.)
7
/
8
7
/
8
1
1
/
8
1
3
/
8
Fan Pulley Pitch Diameter (in.)
Low-Medium Static
6.0
6.4
9.4
9.4
High Static
5.2
N/A
8.0
7.9
Nominal Fan Shaft Diameter (in.)
1
3
/
16
1
3
/
16
1
7
/
16
1
7
/
16
Belt, Quantity...Type...Length (in.)
Low-Medium Static
1...BX...42
1...BX...45
1...BX...50
1...BX...54
High Static
1...BX...42
N/A
1...BX...48
1...BX...50
Pulley Center Line Distance (in.)
13.5-15.5
13.5-15.5
13.3-14.8
14.6-15.4
Speed Change per Full Turn of Movable
Low-Medium Static
58
55
37
37
Pulley Flange (Rpm)
High Static
67
N/A
44
44
Movable Pulley Maximum Full Turns
From Closed Position
4††
4††
4††
4††
Factory Speed
3.5
3.5
3.5
3.5
Factory Speed Setting (Rpm)
Low-Medium Static
978
1240
965
1095
High Static
1327
N/A
1134
1303
HIGH-PRESSURE SWITCH (psig)
Cutout
426
Reset (Auto.)
320
LOW-PRESSURE SWITCH (psig)
Cutout
27
Reset (Auto.)
44
FREEZE PROTECTION THERMOSTAT (F)
Opens
30 ± 5
Closes
45 ± 5
OUTDOOR-AIR INLET SCREENS
Cleanable
Quantity...Size (in.)
2...20 x 25 x 1
1...20 x 20 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
4...20 x 20 x 2
4...16 x 20 x 2
Al
—
Aluminum
Bhp
—
Brake Horsepower
Cu
—
Copper
TXV
—
Thermostatic Expansion Valve
Summary of Contents for 50HJ015-025
Page 20: ...20 Fig 29 MoistureMiser Operation Diagram...
Page 32: ...32 Fig 36 Typical Wiring Schematic 50HJ017 460v Shown...
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