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Table 1 — Physical Data — 581B036-072
LEGEND
*Single phase/three phase.
†Indicates automatic reset.
**60,000 and 72,000 Btuh heat input units have 2 burners. 90,000 and
120,000 Btuh heat input units have 3 burners. 115,000 Btuh heat input units
and 150,000 Btuh Heat input units have 3 burners.
††An LP kit is available as an accessory. If an LP kit is used with low NO
x
units,
one low NO
x
baffle must be removed and the units will no longer be classified
as low NO
x
units.
||California compliant three-phase models.
***California SCAQMD compliant low NO
x
models have combustion products that
are controlled to 40 nanograms per joule or less.
UNIT SIZE 581B 036 048 060 072
NOMINAL CAPACITY 3456
OPERATING WEIGHT (lb)
Unit 530 540 560 635
EconoMi$er IV 50 50 50 50
Perfect Humidity™ Dehumidification System 15 23 23 29
Roof Curb 115 115 115 115
COMPRESSOR Scroll
Quantity 1111
Oil (oz) 42 53 50 60
REFRIGERANT TYPE R-22
Operating Charge (lb-oz)
Standard Unit 5-8 10-2 10-0 12-8
Unit With Perfect Humidity Dehumidification System 9-0 15-8 17-0 21-0
CONDENSER FAN Propeller
Quantity...Diameter (in.) 1...22 1...22 1...22 1...22
Nominal Cfm 3500 3500 4100 4100
Motor Hp...Rpm
1
/
4
...825
1
/
4
...825
1
/
4
...1100
1
/
4
...1100
Watts Input (Total) 180 180 320 320
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in. 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 14.6 16.5 16.5 16.5
EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Metering Device
Standard Unit
Rows...Fins/in. 2...15 2...15 4...15 4...15
Total Face Area (sq ft) 5.5 5.5 5.5 5.5
Unit with Perfect Humidity Dehumidification System
Rows...Fins/in. 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 3.9 3.9 3.9 5.2
EVAPORATOR FAN Centrifugal Type, Belt Drive
Quantity...Size (in.) 1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10
Nominal Cfm 1200 1600 2000 2400
Maximum Continuous Bhp Std 1.20 1.20 1.30/2.40* 2.40
Hi-Static 2.40 2.40 2.90 2.90
Motor Frame Size Std 48 48 48/56* 56
Hi-Static 56 56 56 56
Fan Rpm Range Std 680-1044 770-1185 1035-1460 1119-1585
Hi-Static 1075-1455 1075-1455 1300-1685 1300-1685
Motor Bearing Type Ball Ball Ball Ball
Maximum Fan Rpm 2100 2100 2100 2100
Motor Pulley Pitch Diameter A/B (in.) Std 1.9/2.9 1.9/2.0 2.4/3.4 2.4/3.4
Hi-Static 2.8/3.8 2.8/3.8 3.4/4.4 3.4/3.4
Nominal Motor Shaft Diameter (in.) Std
1
/
2
1
/
2
5
/
8
5
/
8
Hi-Static
5
/
8
5
/
8
5
/
8
7
/
8
Fan Pulley Pitch Diameter (in.) Std 4.5 4.0 4.0 4.0
Hi-Static 4.5 4.0 4.5 4.5
Belt — Type...Length (in.) Std 1...A...36 1...A...36 1....4...40 1...A...38
Hi-Static 1...A...39 1...A...39 1...A...40 1...A...40
Pulley Center Line Distance (in.) 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 65 70 75 95
Hi-Static 65 65 60 60
Movable Pulley Maximum Full
Turns from Closed Position
Std 5565
Hi-Static 6655
Factory Setting — Full Turns Open Std 3333
Hi-Static 3
1
/
2
3
1
/
2
3
1
/
2
3
1
/
2
Factory Speed Setting (rpm) Std 826 936 1248 1305
Hi-Static 1233 1233 1396 1396
Fan Shaft Diameter at Pulley (in.)
5
/
8
5
/
8
5
/
8
5
/
8
Bhp — Brake Horsepower