Bryant 581C024--060, 581B036--072 installation instructions Unit Size 581B

581B,C

Table 1 — Physical Data 581B (cont)

UNIT SIZE 581B			036		048		060		072
FURNACE SECTION
Rollout Switch Cutout Temp (F)†			195		195		195		195
Burner Orifice Diameter (in. ...	drill size)**
Natural Gas —Std		071/072	.113	...33	.113	...33	.113	...33	.113	...33
		114/115	.113	...33	.113	...33	.113	...33	.113	...33
		149/150	—		.129	...30	.129	...30	.129	...30
		060N	.102	...38	.102	...38	.102	...38	—
		090N	.102	...38	.102	...38	.102	...38	—
		120N	—		.116	...32	.116	...32	—
Propane —Alt††		071/072	.089	...43	.089	...43	.089	...43	.089	...43
		114115	.089	...43	.089	...43	.089	...43	.089	...43
		149/150	—		.102	...38	.102	...38	.104	...39
		060N	.082	...45	.082	...45	.082	...45	—
		090N	.082	...45	.082	...45	.082	...45	—
Thermostat Heat Anticipator Setting (amps)		120N	—		.094	...42	.094	...42	—
208/230/460 v
First Stage			.14		.14		.14		.14
Second Stage			.14		.14		.14		.14
Gas Input (Btuh)
First Stage/Second Stage (3---	phase units)	072	50,000/ 72,000		50,000/ 72,000		50,000/ 72,000		50,000/ 72,000
		115	82,000/115,000		82,000/115,000		82,000/115,000		82,000/115,000
		150	—		120,000/150,000		120,000/150,000		120,000/150,000
		071II	—/72,000		—/72,000		—/72,000		—
		114II	—/115,000		—/115,000		—/115,000		—
		149II	—		—/150,000		—/150,000		—
		060N***	—/ 60,000		—/60,000		—/60,000		—
		090N***	—/ 90,000		—/90,000		—/90,000		—
		120N***	—		—/120,000		—/120,000		—
Efficiency (Steady State) (%)		072	82		82		82		82
		115	80		81		81		81
		150	—		80		80		80
		071	82		82		82		—
		114	80		81		81		—
		149	—		80		80		—
		060N	80		80		80		—
		090N	80		80		80		—
		120N	—		80		80		—
Temperature Rise Range		072	15---	45	15---	45	15---	45	15---	45
		115	55---	85	35---	65	35---	65	35---	65
		150	—		50---	80	50---	80	50---	80
		071	15---	45	15---	45	15---	45	—
		114	55---	85	35---	65	35---	65	—
		149	—		50---	80	50---	80	—
		060N	20---	50	20---	50	20---	50	—
		090N	30---	60	30---	60	30---	60	—
Manifold Pressure (in. wg)		120N	—		40---	70	40---	70	—
Natural Gas —Std			3.5		3.5		3.5		3.5
Propane —Alt††			3.5		3.5		3.5		3.5
Maximum Static Pressure (in. wg)			1.0		1.0		1.0		1.0
Field Gas Connection Size (in.)			1/2		1/2		1/2		1/2

HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief	450	±	50
Cutout	428
Reset (Auto.)	320
LOSS-OF-CHARGE SWITCH/LOW-PRESSURE
(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. Screen quantity and size varies with option selected.
RETURN-AIR FILTERS	Throwaway
...Quantity Size (in.)	...2 16 x 25 x 2			...4 16 x 16 x 2

LEGEND

Bhp — Brake Horsepower

**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.

††A propane kit is available as an accessory. Kit may be used at elevations as high as 2000 ft. If a propane kit is used with Low NOx units, the Low NOx baffle must be removed and the units will no longer be classified as Low NOx units.

ll Three-phase standard models have heating inputs as shown. Single-phase stan- dard models have one-stage heating with heating input values.

***California compliant three-phase models.

†††California SCAQMD compliant low NOx models have combustion products that are controlled to 40 nanograms per joule or less.

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