14
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
EconoMi$erIV or EconoMi$er2 50 50 50 50
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
3
/
8
-in. OD 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
3
/
8
-in. OD 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 770-1175 878-1192 —
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 556—
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 856 932 1035 —
High-Static 1233 1233 1416 1416
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 and size depend on options selected.
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 2...16 x 25 x 2
Bhp — Brake Horsepower
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