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PHYSICAL DATA
548F036-072
LEGEND
*Weight of 14-in. roof curb.
†Single phase/three phase.
NOTE:
The 548F units have a loss-of-charge switch located in the liquid line.
UNIT SIZE 548F 036 048 060 072
NOMINAL CAPACITY (tons)
3456
OPERATING WEIGHT (lb)
Unit
500 520 550 590
Economizer
Durablade
34 34 34 34
EconoMi$er
47 47 47 47
Roof Curb*
115 115 115 115
COMPRESSOR
Hermetic
Quantity
1111
Oil (oz)
45 54 50 54
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Circuit 1
5-1 6-0 8-0 11-2
Circuit 2
————
OUTDOOR COIL
Enhanced Copper Tubes, Aluminum Lanced Fins, Fixed Orifice Metering Device
Rows...Fins/in.
1...17 1...17 2...17 2...17
Total Face Area (sq ft)
10.31 14.58 12.25 16.53
OUTDOOR FAN
Propeller Type
Nominal Cfm
4000 4000 4000 4000
Quantity...Diameter (in.)
1...22.0 1...22.0 1...22.0 1...22.0
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts Input (Total)
325 325 325 325
INDOOR COIL
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Fixed Orifice Metering Device
Rows...Fins/in.
2...15 2...15 3...15 3...15
Total Face Area (sq ft)
4.2 4.2 5.5 5.5
INDOOR FAN
Centrifugal Type
Quantity...Size (in.) Std
1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10
Alt
1...10 x 10 1...10 x 10 1...10 x 10 —
High-Static
1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10
Type Drive Std
Direct Direct Direct Belt
Alt
Belt Belt Belt —
High-Static
Belt Belt Belt Belt
Nominal Cfm
1200 1600 2000 2400
Maximum Continuous Bhp Std
.34 .75 1.20 2.40
Alt
1.00 1.00 1.30/2.40†—
High-Static
2.40 2.40 2.90 2.90
Motor Frame Size Std
48 48 48 56
Alt
48 48 56 —
High-Static
56 56 56 56
Nominal Rpm High/Low Std
860/800 1075/970 1075/970 —
Alt
1620 1620 1725 —
High-Static
1725 1725 1725 1725
Fan Rpm Range Std
———1070-1460
Alt
760-1000 835-1185 900-1300 —
High-Static
1075-1455 1075-1455 1300-1685 1300-1685
Motor Bearing Type
Ball Ball Ball Ball
Maximum Allowable Rpm
2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std
———2.8/3.8
Alt
1.9/2.9 1.9/2.9 2.4/3.4 —
High-Static
2.8/3.8 2.8/3.8 3.4/4.4 3.4/4.4
Nominal Motor Shaft Diameter (in.) Std
1
/
2
1
/
2
1
/
2
5
/
8
Alt
1
/
2
1
/
2
5
/
8
—
High-Static
5
/
8
5
/
8
5
/
8
5
/
8
Fan Pulley Pitch Diameter (in.) Std
———4.5
Alt
4.5 4.0 4.5 —
High-Static
4.5 4.5 4.5 4.5
Belt, Quantity...Type...Length (in.) Std
———1...A...40
Alt
1...A...34 1...A...34 1...A...39 —
High-Static
1...A...39 1...A...39 1...A...40 1...A...40
Pulley Center Line Distance (in.) Std
———14.7-15.5
Alt
10.0-12.4 10.0-12.4 14.7-15.5 —
High-Static
10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5
Speed Change per Full Turn of
Movable Pulley Flange (rpm) Std
———80
Alt
48 70 80 —
High-Static
65 65 60 60
Movable Pulley Maximum Full Turns
From Closed Position Std
———5
Alt
555—
High-Static
6655
Factory Setting Std
———3
Alt
333—
High-Static
3
1
/
2
3
1
/
2
3
1
/
2
3
1
/
2
Factory Speed Setting (rpm) Std
———1225
Alt
856 975 1060 —
High-Static
1233 1233 1396 1396
Fan Shaft Diameter at Pulley (in.)
5
/
8
5
/
8
5
/
8
5
/
8
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
450 ± 50
Cutout
428
Reset (Auto.)
320
LOSS-OF-CHARGE SWITCH (psig)
Cutout
7 ± 3
Reset (Auto.)
22 ± 7
FREEZE-PROTECTION THERMOSTAT (F)
Opens
30 ± 5
Closes
45 ± 5
OUTDOOR-AIR INLET SCREENS
Cleanable
Quantity...Size (in.)
1...20 x 24 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
2...16 x 25 x 2
Bhp —
Brake Horsepower
50TFQ004-012
548F036-120