73
PHYSICAL DATA — 549B036-072
LEGEND
*Single phase/three phase.
UNIT SIZE 549B 036 048 060 072
NOMINAL CAPACITY (tons) 3456
OPERATING WEIGHT (lb)
Unit 550 560 630 630
EconoMi$erIV 50 50 50 50
Roof Curb 115 115 115 115
COMPRESSOR Scroll
Quantity 1111
Oil (oz) 42 42 53 80
REFRIGERANT TYPE R-22
Operating Charge (lb) 12.0 12.0 18.3 17.7
OUTDOOR COIL Enhanced Copper Tubes, Aluminum Fins, Fixed Orifice Metering Device
Rows...Fins/in. 2...17 2...17 2...17 2...17
Total Face Area (sq ft) 16.53 16.53 21.25 21.25
OUTDOOR FAN Propeller Type
Quantity...Diameter (in.) 1...22 1...22 1...22 1...22
Nominal Cfm 3500 3500 3500 3500
Motor Hp...Rpm
1
/
8
...825
1
/
8
...825
1
/
4
...1100
1
/
4
...1100
INDOOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Fixed Orifice Metering Device
Rows...Fins/in. 2...15 3...15 4...15 4...15
Total Face Area (sq ft) 5.5 5.5 7.33 7.33
INDOOR FAN Centrifugal Type
Quantity...Size (in.) Std 1...10 x 10 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 Belt Belt Belt Belt
High-Static Belt Belt Belt Belt
Nominal Cfm 1200 1600 2000 2400
Maximum Continuous Bhp Std 1.20 1.20 1.30/2.40* 2.40
High-Static 2.40 2.40 2.90 2.90
Motor Frame Size Std 48 48 56 56
High-Static 56 56 56 56
Nominal Rpm High/Low Std 1620 1620 1725 —
High-Static 1725 1725 1725 1725
Fan Rpm Range Std 680-1044 770-1185 1035-1460 1119-1585
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 1.9/2.9 1.9/2.9 2.4/3.4 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
5
/
8
5
/
8
High-Static
5
/
8
5
/
8
5
/
8
5
/
8
Fan Pulley Pitch Diameter (in.) Std 4.5 4.0 4.5 3.7
High-Static 4.5 4.5 4.5 4.5
Belt, Quantity...Type...Length (in.) Std 1...A...34 1...A...34 1...A...39 1...A...40
High-Static 1...A...39 1...A...39 1...A...40 1...A...40
Pulley Center Line Distance (in.) Std 10.0-12.4 10.0-12.4 14.7-15.5 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 48 70 80 80
High-Static 65 65 60 60
Movable Pulley Maximum Full Turns
From Closed Position Std 5565
High-Static 6655
Factory Setting Std 3333
High-Static 3
1
/
2
3
1
/
2
3
1
/
2
3
1
/
2
Factory Speed Setting (rpm) Std 826 936 1249 1305
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 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.
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 2...16 x 25 x 2
Bhp — Brake Horsepower
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