Bryant 581A operation manual Physical Data

Table 1 — Physical Data

UNIT 581A		210	240	300
NOMINAL CAPACITY (tons)		18	20	25
OPERATING WEIGHT (lb)
Al/Al*		2224	2272	2526
COMPRESSOR
Quantity		3	3	2
Number of Refrigerant Circuits		3	3	2
Oil (ounces) Ckt A...Ckt B...Ckt C		68...68...90	90...90...90	110...110...N/A
REFRIGERANT TYPE		R-22	R-22	R-22
Expansion Device		TXV	TXV	TXV
Operating Charge (lb)
Circuit A		13.1	13.8	21.8
Circuit B		12.7	13.9	20.3
Circuit C		15.2	15.5	N/A
CONDENSER FAN
Nominal Cfm (Total, all fans)		14,000	14,000	21,000
Quantity...Diameter (in.)		4...22	4...22	6...22
Motor Hp...Rpm		1/4...1100	1/4...1100	1/4...1100
Watts Input (Total)		1400	1400	2100
CONDENSER COIL
Rows...Fins/in.		2...17	2...17	2...17
Total Face Area (sq ft)		57.78	57.78	66.67
EVAPORATOR FAN
Quantity...Size		2...15x11	2...15x11	2...15x11
Type Drive		Belt	Belt	Belt
Nominal Cfm		7000	8000	10,000
Motor Bearing Type		Ball	Ball	Ball
Maximum Allowable Fan Rpm		1400	1400	1400
EVAPORATOR COIL
Rows...Fins/in.		3...15	4...15	4...15
Total Face Area (sq ft)		23.33	23.33	27.22
FURNACE SECTION
Rollout Switch Cutout Temp (F)		225	225	225
Burner Orifice Diameter (in. ...drill size)		0.136...29	0.136...29	0.136...29
Gas		Natural	Natural	Natural
Thermostat Heat Anticipator Setting
Stage 1 (amps)		0.98	0.98	0.98
Stage 2 (amps)		0.44	0.44	0.44
Gas Input (Btuh) HIGH HEAT	Stage 1	317,000	317,000	317,000
	Stage 2	400,000	400,000	400,000
Efficiency (Steady State) %	Vertical	82	82	82
Temperature Rise Range (F)		25-55	25-55	25-55
Gas Input (Btuh) MEDIUM HEAT	Stage 1	281,000	281,000	281,000
	Stage 2	365,000	365,000	365,000
Efficiency (Steady State) %	Vertical	81	81	81
Temperature Rise Range (F)		25-55	25-55	25-55
Gas Input (Btuh) LOW HEAT	Stage 1	199,000	199,000	199,000
	Stage 2	250,000	250,000	250,000
Efficiency (Steady State) %	Vertical	82	82	82
Temperature Rise Range (F)		15-45	15-45	15-45
Manifold Pressure
Natural Gas (in. wg)	Vertical	3.00	3.00	3.00
Natural Gas (in. wg)	Horizontal	2.95	2.95	2.95
Gas Valve Quantity		1	1	1
Gas Valve Pressure Range	(in. wg)	5.5-13.0	5.5-13.0	5.5-13.0
Min-Max Allowable	(psig)	.235-.469	.235-.469	.235-.469
Field Gas Connection Size (in. FPT)		3/4	3/4	3/4
HIGH-PRESSURE SWITCH (psig)
Cutout		426	426	426
Reset (Auto)		320	320	320
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)		3...20x25	3...20x25	3...20x25
RETURN-AIR FILTERS
Quantity...Size (in.)		9...16x25	9...16x25	9...18x24
LEGEND		*Aluminum evaporator coil and aluminum condenser coil.
N/A — Not Applicable
TXV — Thermostatic Expansion Valve

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