74
PHYSICAL DATA — 549B090-120
LEGEND
BASE UNIT 549B 090 102 120
NOMINAL CAPACITY (tons) 7
1
/
2
8
1
/
2
10
OPERATING WEIGHT (lb)
Unit 870 1000 1000
EconoMi$erIV 75 75 75
Roof Curb 223 223 223
COMPRESSOR Scroll
Quantity 222
Oil (oz) (each compr) 57 70 57
REFRIGERANT TYPE R-22
Operating Charge (lb)
Circuit 1 9.5 11.0 10.7
Circuit 2 9.5 11.0 10.8
OUTDOOR COIL Enhanced Copper Tubes, Aluminum Fins, Fixed Orifice Metering Device
Rows...Fins/in. 2...17 2...17 2...17
Total Face Area (sq ft) 20.5 25.1 25.1
OUTDOOR FAN Propeller
Quantity...Diameter (in.) 2...22 2...22 2...22
Nominal Cfm 6500 6500 6500
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
INDOOR COIL
Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Fixed Orifice Metering Device
Rows...Fins/in. 3...15 4...15 4...15
Total Face Area (sq ft) 8.9 11.1 11.1
INDOOR FAN Centrifugal Type
Quantity...Size (in.) Standard 1...15 x 15 1...15 x 15 1...15 x 15
High-Static 1...15 x 15 1...15 x 15 1...15 x 15
Type Drive Standard Belt Belt Belt
High-Static Belt Belt Belt
Nominal Cfm 3000 3400 4000
Maximum Continuous Bhp Standard 2.90 2.90 3.70
High-Static 3.70 3.70 5.25
Motor Frame Size Standard 56 56 56
High-Static 56 56 56
Nominal Rpm Standard 1725 1725 1725
High-Static 1725 1725 1725
Fan Rpm Range Standard 730-950 840-1085 860-1080
High-Static 860-1080 860-1080 922-1219
Motor Bearing Type Ball Ball Ball
Maximum Allowable Rpm 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Standard 3.4/4.4 3.4/4.4 4.0/5.0
High-Static 4.0/5.0 4.0/5.0 3.1/4.1
Nominal Motor Shaft Diameter (in.) Standard
7
/
8
7
/
8
7
/
8
High-Static
7
/
8
7
/
8
7
/
8
Fan Pulley Pitch Diameter (in.) Standard 8.0 7.0 8.0
High-Static 8.0 8.0 5.8
Belt, Quantity...Type...Length (in.) Standard 1...A...51 1...A...51 1...A...53
High-Static 1...A...53 1...A...53 1...BX...48
Pulley Center Line Distance (in.) Standard 16.75-19.25 16.75-19.25 15.85-17.50
High-Static 16.75-19.25 16.75-19.25 15.85-17.50
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Standard 45 45 45
High-Static 45 45 60
Movable Pulley Maximum Full
Turns from Closed Position
Standard 555
High-Static 556
Factory Setting Standard 555
High-Static 555
Factory Speed Setting (rpm) Standard 730 840 860
High-Static 860 860 972
Fan Shaft Diameter at Pulley (in.) 111
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief 625
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
Closes (F) 45
OUTDOOR-AIR INLET SCREENS Cleanable.
Screen quantity and size varies with option selected.
OUTDOOR-AIR INLET SCREENS Cleanable.
Quantity...Size (in.) 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2
Bhp — Brake Horsepower
