20
PHYSICAL DATA (cont)
548F090-120
LEGEND
*Weight of 14-in. roof curb.
NOTE:
The 548F units have a loss-of-charge switch located in the liquid line.
UNIT SIZE 548F 090 102 120
NOMINAL CAPACITY (tons)
7
1
/
2
8
1
/
2
10
OPERATING WEIGHT (lb)
Unit
940 965 1015
Economizer
Durablade
44 44 44
EconoMi$er
62 62 62
Roof Curb*
143 143 143
COMPRESSOR
Hermetic
Quantity
222
Oil (oz)
45 ea 54 ea 54 ea
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Circuit 1
5-14 8- 6 7-14
Circuit 2
5-13 8-13 8- 3
OUTDOOR COIL
Enhanced Copper Tubes, Aluminum Lanced Fins Fixed Orifice Metering Device
Rows...Fins/in.
1...17 2...17 2...17
Total Face Area (sq ft)
20.50 18.00 18.30
OUTDOOR FAN
Propeller Type
Nominal Cfm
6500 6500 6500
Quantity...Diameter (in.)
2...22 2...22 2...22
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts Input (Total)
500 500 500
INDOOR COIL
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Fixed Orifice Metering Device
Rows...Fins/in.
3...15 3...15 3...15
Total Face Area (sq ft)
8.0 8.0 11.1
INDOOR FAN
Centrifugal Type
Quantity...Size (in.) Std
1...15 x 15 1...15 x 15 1...15 x 15
Alt
1...15 x 15 — 1...15 x 15
High-Static
1...15 x 15 1...15 x 15 1...15 x 15
Type Drive Std
Belt Belt Belt
Alt
Belt — Belt
High-Static
Belt Belt Belt
Nominal Cfm
3000 3600 4000
Maximum Continuous Bhp Std
2.40 2.40 2.40
Alt
2.40 — 2.90
High-Static
3.70 3.70 5.25
Motor Frame Size Std
56 56 56
Alt
56 — 56
High-Static
56 56 56
Nominal Rpm High/Low Std
———
Alt
———
High-Static
1725 1725 1725
Fan Rpm Range Std
590- 840 685- 935 685- 935
Alt
685- 935 — 835-1085
High-Static
860-1080 860-1080 830-1130
Motor Bearing Type
Ball Ball Ball
Maximum Allowable Rpm
2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std
2.4/3.4 2.8/3.8 2.8/3.8
Alt
2.8/3.8 — 3.4/4.4
High-Static
4.0/5.0 4.0/5.0 2.8/3.8
Nominal Motor Shaft Diameter (in.) Std
5
/
8
5
/
8
5
/
8
Alt
5
/
8
—
7
/
8
High-Static
7
/
8
7
/
8
7
/
8
Fan Pulley Pitch Diameter (in.) Std
7.0 7.0 7.0
Alt
7.0 — 7.0
High-Static
8.0 8.0 5.8
Belt, Quantity...Type...Length (in.) Std
1...A...49 1...A...49 1...A...49
Alt
1...A...49 — 1...A...49
High-Static
1...A...55 1...A...55 1...BX...46
Pulley Center Line Distance (in.) Std
16.75-19.25 16.75-19.25 15.85-17.50
Alt
15.75-19.25 — 15.85-17.50
High-Static
15.75-19.25 16.75-19.25 15.85-17.50
Speed Change per Full Turn of
Movable Pulley Flange (rpm) Std
50 50 50
Alt
50 — 50
High-Static
60 60 60
Movable Pulley Maximum Full Turns
From Closed Position Std
555
Alt
5 — 5
High-Static
556
Factory Setting Std
555
Alt
5 — 5
High-Static
555
Factory Speed Setting (rpm) Std
590 685 685
Alt
685 — 835
High-Static
860 860 887
Fan Shaft Diameter at Pulley (in.)
111
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 ± 5
FREEZE-PROTECTION THERMOSTAT (F)
Opens
30 ± 5
Closes
45 ± 5
OUTDOOR-AIR INLET SCREENS
Cleanable
Quantity...Size (in.)
1...20 x 25 x 1
1...16 x 25 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
4...16 x 20 x 2 4...16 x 20 x 2 4...20 x 20 x 2
Bhp —
Brake Horsepower
50TFQ004-012
548F036-120
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