Bryant 581B installation instructions Ð Specications

Table 1 Ð Speci®cations

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 Ð 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	65				70			75			93
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns		5			5			5			5
from Closed Position
Factory Setting Ð 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		High	Low	Medium	High	Low	Medium	High	Low	Medium	High
Rollout Switch Cutout Temp (F)*	Heat		Heat	Heat	Heat	Heat	Heat	Heat	Heat	Heat	Heat	Heat
	195		195	195	195	195	195	195	195	195	195	195
Burner Ori®ce Diameter (in. ...drill size)²
Natural Gas Ð 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 Ð 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 Ð Brake Horsepower

*Indicates automatic reset. ²581B036072-072072 units have 2 burners.

581B036115-072115 and 581B048150-072150 units have 3 burners. **Indicates an accessory.

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