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PHYSICAL DATA — 551B090-150
LEGEND
Bhp —
Brake Horsepower
UNIT 551B 090 102 120 150
NOMINAL CAPACITY (tons)
7
1
/
2
8
1
/
2
10 12
1
/
2
OPERATING WEIGHT (lb)
Unit
755 760 915 930
EconoMi$er
62 62 62 62
Perfect Humidity™ Dehumidification Package
29 29 33 33
Roof Curb
143 143 143 143
COMPRESSOR
Scroll
Quantity
2222
Oil (oz) (each compressor)
53 53 50 60
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Standard Unit
Circuit 1
7-10 7-14 9-3 9-8
Circuit 2
8- 2 8- 5 10-3 9-5
Unit With Perfect Humidity Dehumidification Package
Circuit 1
10-10 10-11 12- 8 12-6
Circuit 2
12- 8 10-10 12-14 12-2
CONDENSER FAN
Propeller Type
Quantity...Diameter (in.)
2...22 2...22 2...22 2...22
Nominal Cfm
6500 6500 7000 7000
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts Input (Total)
650 650 650 650
CONDENSER COIL
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
Standard Unit
Rows...Fins/in.
2...17 2...17 2...17 2...17
Total Face Area (sq ft)
20.5 20.5 25.0 25.0
Unit with Perfect Humidity Dehumidification Package
Rows...Fins/in.
1...17 1...17 1...17 1...17
Total Face Area (sq ft)
6.3 6.3 8.4 8.4
EVAPORATOR FAN
Centrifugal Type, Belt Drive
Size (in.)
15 x 15 15 x 15 15 x 15 15 x 15
Nominal Cfm — Standard
3000 3400 4000 5000
Maximum Continuous Bhp
Standard
2.90 2.90 3.70 5.25
High Static
4.20 4.20 5.25 —
Motor Frame
56 56 56 56
Fan Rpm Range
Standard
840-1085 840-1085 860-1080 900-1260
High Static
860-1080 860-1080 830-1130 —
Motor Bearing Type
Ball Ball Ball Ball
Maximum Fan Rpm
2100 2100 2100 2100
Motor Pulley Pitch Diameter A/B (in.)
Standard
3.4/4.4 3.4/4.4 4.0/5.0 2.8/3.8
High Static
4.0/5.0 4.0/5.0 2.8/3.8 —
Nominal Motor Shaft Diameter (in.)
7
/
8
7
/
8
7
/
8
7
/
8
Fan Pulley Pitch Diameter (in.)
Standard
7.0 7.0 8.0 5.8
High Static
8.0 8.0 5.8 —
Belt — Quantity...Type...Length (in.)
Standard
1...A...51 1...A...51 1...A...51 1...BX...46
High Static
1...A...55 1...A...55 1...BX...46 —
Pulley Center Line Distance (in.)
16.75-19.25 16.75-19.25 15.85-17.50 15.85-17.50
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Standard
50 50 45 60
High Static
60 60 60 —
Movable Pulley Maximum Full Turns
From Closed Position
Standard
5556
High Static
556—
Factory Setting — Full Turns Open
5555
Factory Speed Setting (rpm)
Standard
840 840 860 960
High Static
860 860 890 —
Fan Shaft Diameter at Pulley (in.)
1111
EVAPORATOR COIL
High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Acutrol™ Metering Device
Rows...Fins/in.
3...15 3...15 4...15 4...15
Total Face Area (sq ft)
8.9 8.9 11.1 11.1
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
450 ± 50
Cutout
428
Reset (Auto.)
320
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH (Liquid Line) (psig)
Cutout
7 ± 3
Reset (Auto.)
22 ± 5
FREEZE-PROTECTION THERMOSTAT
Opens (F)
30 ± 5
Closes (F)
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 4...20 x 20 x 2
0TFQ004-012
551B036-150