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

581B,C

Table 2 — Physical Data 581C (cont)

UNIT SIZE 581C		024	036	048	060
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	removed and the units will no longer be classified as Low NOx units.
Bhp — Brake Horsepower	ll Three-phase standard models have heating inputs as shown. Single-phase stan-
	dard models have one-stage heating with heating input values.

**60,000 and 72,000 Btuh heat input units have 2 burners. 90,000 and 120,000 Btuh	***California compliant three-phase models.
heat input units have 3 burners. 115,000 Btuh heat input units and 150,000 Btuh
	†††California SCAQMD compliant low NOx models have combustion products that are
Heat input units have 3 burners.
	controlled to 40 nanograms per joule or less.
††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

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