Carrier 50LJ - Manual (Page 4)

Table 1a — Physical Data, 48LJ Units
BASE UNIT 48LJ D024 E024
NOMINAL CAPACITY (tons) lb 20 20
OPERATING WEIGHT (lb)* 2895 2975
COMPRESSORS (2 each unit)
Capacity Steps (%)
Hermetric, 3600 Rpm
50, 100
REFRIGERANT
Operating Charge (lb), Sys 1/Sys 2
R-22 Controlled by Acutrol™ Metering Device
16 0/16.0
CONDENSER COILS
Face Area (sq ft)
Fins Per In. (Al)
3-Row, %-in. Tube Diameter
24.75
17.0
EVAPORATOR COILS
Face Area (sq ft)
Fins Per In.
4-Row, %-in. Tube Diameter
20.3
15
FURNACE SECTION
Number of Heat Exchangers
Input (MBtuh)
Output (MBtuh)
Temperature Rise (°F)
Burner Orifice Diameter (in. ...drill no.)
Pilot Orifice Diameter (in. ...drill no.)
Firing Stages
Number of Gas Valves
5
242
194
10-40
.129...30
.046...56
2
1
10
475
380
30-60
.129 ..30
.055...54
2
2
CONDENSER FANS (2 each unit)
Nominal Cfm
Nominal Hp
Propelier Type, 30-in. Diameter, 1130 Rpm
13,000
1 0
EVAPORATOR FANS (1 each unit)t
Nominal Cfm
Maximum Allowable Cfm
Maximum Allowable Rpm
Centrifugai Type, 18 x 15-in., 1.438-in. Fan Pulley Bore
8,000
10,000
1,200
Standard Motor and Drive
Motor Hp
Full Load Efficiency (%)
Motor Frame Size
Fan Pulley Pitch Diameter (in.)
Motor Pulley Pitch Diameter (in.)
Resulting Fan Rpm
1750 Rpm
5
84.3
184T
10.6
4.75
780
Optional Motor and Drive
Motor Hp
Full Load Efficiency (%)
Motor Frame Size
Fan Pulley Pitch Diameter (In.)
Motor Pulley Pitch Diameter (in.)
Resulting Fan Rpm
1750 Rpm
7.5
84.8
213T
8.0
4.12
900
Optional Power Exhaust
Motors...Hp
Fans...Diameter (in.)
Propeller Type, 1140 Rpm
1.. 1.0
1 .24
Filters (Quantity...L x W xD)
20% Standard Efficiency Disposable
2. 18
X
24
X
2
4...24
X
24
X
2
'Weights include economizer, but not rainhood. See Fig. 1 for weights of options and accessories.
tStandard fan motor is supplied with standard fan drive and belts Optional motor is supplied with optional fan drive,
pulleys, and belts. Other combinations are field supplied.