Bryant Gas Heating/Electric Cooling Units 581B User Manual
Page 6
Table 1 — Specifications
BASE UNIT 581B
036
048
060
072
NOMINAL CAPACITY (tons)
3
4
5
6
OPERATING WEIGHT (lb)
Unit
530
540
560
615
With Economizer
564
574
594
649
Roof Curb
115
115
115
115
COMPRESSOR
Scroll
Quantity
1
1
1
1
Oil (oz)
42
53
50
60
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
5-8
8-6
10.0
9-10
CONDENSER FAN
Propeller
Quantity...Diameter (in.)
1...22
1...22
1...22
1...22
Nominal Cfm
3000
3000
4000
4000
Motor Hp...Rpm
1
⁄
8
...825
1
⁄
8
...825
1
⁄
4
...1100
1
⁄
4
...1100
Watts Input (Total)
180
180
300
300
CONDENSER COIL
Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in.
1...17
2...17
2...17
2...17
Total Face Area (sq ft)
14.58
16.53
16.53
16.53
EVAPORATOR FAN
Centrifugal
Size (in.)
10 x 10
10 x 10
10 x 10
10 x 10
Type Drive
Belt
Belt
Belt
Belt
Nominal Cfm
1200
1600
2000
2400
Maximum Continuous Bhp
1.20
1.20
1.80
2.40
Motor Frame Size
48
48
56
56
Fan Rpm Range
760-1090
840-1185
1020-1460
1120-1585
Motor Bearing Type
Ball
Ball
Ball
Ball
Maximum Fan Rpm
2100
2100
2100
2100
Motor Pulley Pitch Diameter A/B (in.)
1.9/2.9
1.9/2.9
2.4/3.4
2.4/3.4
Nominal Motor Shaft Diameter (in.)
1
⁄
2
1
⁄
2
1
⁄
2
5
⁄
8
Fan Pulley Pitch Diameter (in.)
4.5
4.0
4.0
3.7
Belt — Type...Length (in.)
A...33
A...36
A...40
A...38
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)
65
70
75
93
Movable Pulley Maximum Full Turns
from Closed Position
5
5
5
5
Factory Setting — Full Turns Open
3
3
3
3
Factory Speed Setting (rpm)
890
980
1240
1305
Fan Shaft Diameter at Pulley (in.)
5
⁄
8
5
⁄
8
5
⁄
8
5
⁄
8
EVAPORATOR COIL
Enhanced Copper Tubes, Aluminum Double Wavy Fins, Acutrol™ Feed Device
Rows...Fins/in.
2...15
2...15
4...15
4...15
Total Face Area (sq ft)
5.5
5.5
5.5
5.5
FURNACE SECTION
Medium
Heat
High
Heat
Low
Heat
Medium
Heat
High
Heat
Low
Heat
Medium
Heat
High
Heat
Low
Heat
Medium
Heat
High
Heat
Rollout Switch Cutout Temp (F)*
195
195
195
195
195
195
195
195
195
195
195
Burner Orifice Diameter (in. ...drill size)†
Natural Gas — Std
.113...33
.113...33
.113...33
.113...33 .129...30 .113...33
.113...33 .129...30 .113...33
.113...33 .129...30
Liquid Propane — Alt**
.089...43 .089...43 .089...43 .089...43 .102...38 .089...43 .089...43 .102...38 .089...43 .089...43 .102...38
Thermostat Heat Anticipator Setting (amps)
208/230/460 v
Stage 1
.14
.14
.14
.14
.14
.14
.14
.14
.14
.14
.14
Stage 2
.14
.14
.14
.14
.14
.14
.14
.14
.14
.14
.14
Gas Input (Btuh)
Stage 1
50,000
82,000
50,000
82,000
120,000
50,000
82,000
120,000
50,000
82,000
120,000
Stage 2
72,000
115,000
72,000
115,000
150,000
72,000
115,000
150,000
72,000
115,000
150,000
Efficiency (Steady State) (%)
82
80
82
81
80
82
81
80
82
81
80
Temperature Rise Range (F)
15-45
55-85
15-45
35-65
50-80
15-45
35-65
50-80
15-45
35-65
50-80
Manifold Pressure (in. wg)
Natural Gas (Std)
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
Liquid Propane (Alt)**
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
Maximum Static Pressure (in. wg)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Gas Valve Quantity
1
1
1
1
1
1
1
1
1
1
1
Field Gas Connection Size (in.)
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief
450
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 24 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
2...16 x 25 x 2
LEGEND
Bhp — Brake Horsepower
*Indicates automatic reset.
†581B036072-072072 units have 2 burners.
581B036115-072115 and 581B048150-072150 units have 3 burners.
**Indicates an accessory.
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