Bryant 581A/B manual Physical Data 581A155,180, Unit 581A

PHYSICAL DATA — 581A155,180

UNIT 581A			155							180
		208/230		460		575	208/230			460	575
NOMINAL CAPACITY (tons)			12							15
OPERATING WEIGHT (lb)
Unit
Al/Al*			1725					1800
Al/Cu*			1875					1950
Cu/Cu*			2005					2080
EconoMi$er IV			90							90
EconoMi$er2			85							85
Roof Curb†			200							200
Hot Gas Reheat Dehumidification Package				—						40
COMPRESSOR
Quantity...Model (Ckt 1, Ckt 2)				2...ZR72KC			1...ZR94KC, 1...ZR72KC
Number of Refrigerant Circuits			2							2
Loading (% of full capacity)			0,53,100					0,60,100
Crankcase Heater Watts			70							70
Oil (oz) (Ckt 1, Ckt 2)			60,60					85,60
REFRIGERANT TYPE						R-22
Expansion Device						TXV
Operating Charge (lb)
Circuit 1**			20.7							19.5
Circuit 2			13.4					13.45
CONDENSER FAN						Propeller Type
Nominal Cfm			10,500					10,500
Quantity...Diameter (in.)			3...22					3...22
Motor Hp...Rpm			1/ ...1050					1/		...1050
Watts Input (Total)			2					2
			1100					1100
CONDENSER COIL				Cross-Hatched 3/ -in. Copper Tubes, Aluminum Lanced, Aluminum
			8
					Pre-Coated, or Copper Plate Fins
Rows...Fins/in.			4...15					4...15
Total Face Area (sq ft)			21.7							21.7
EVAPORATOR FAN						Centrifugal Type
Quantity...Size (in.)				2...12 X 12					2...12 x 12
Type Drive				Belt						Belt
Nominal Cfm			5200					6000
Std Motor Hp			2.9			3.0				5
Opt Motor Hp			3.7			N/A				N/A
Motor Nominal Rpm			1725					1745
Std Maximum Continuous Bhp			3.13			3.38				6.13
Opt Maximum Continuous Bhp			4.26			N/A
Motor Frame Size				56H					184T
Fan Rpm Range	Low-Medium Static	895-1147				895-1147		873-1021
Motor Bearing Type	High Static	1040-1315				N/A		1025-1200
				Ball						Ball
Maximum Allowable Rpm			1550					1550
Motor Pulley Pitch Dia.	Low-Medium Static		3.1/4.1			3.1/4.1		4.9/5.9
Nominal Motor Shaft Diameter (in.)	High Static		3.7/4.7			N/A		4.9/5.9
	Low-Medium Static		7/8			7/8				11/8
Fan Pulley Pitch Diameter (in.)			6.0			6.0				9.4
Nominal Fan Shaft Diameter (in.)	High Static		6.0			6.0				8.0
	Low-Medium Static		13/16			13/16				17/16
Belt, Quantity...Type... Length (in.)		1...BX...45				1...BX...45			1...BX...50
Pulley Center Line Distance (in.)	High Static	1...BX...45				1...BX...45			1...BX...48
		14.5-16.0				14.5-16.0		13.3-14.8
Speed Change per Full Turn of Movable
Pulley Flange (Rpm)	Low-Medium Static		45			45				37
Movable Pulley Maximum	High Static		45			N/A				44
Full Turns From Closed Position			6			6				4††
Factory Speed			3.5			3.5				3.5
Factory Speed Setting (Rpm)	Low-Medium Static		987			987				965
	High Static		1155			N/A		1134
EVAPORATOR COIL		Cross-Hatched 3/ -in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split
			8
Rows...Fins/in.			4...15					4...15
Total Face Area (sq ft)			17.5							17.5
FURNACE SECTION
Rollout Switch Cutout Temp (F)***			190							190
Burner Orifice Diameter (in...drill size)
Natural Gas	Std		0.1285...30/ 0.136...29					0.1285...30/ 0.136...29
Liquid Propane†††	Alt		0.1065...36/0.1065...36					0.1065...36/0.1065...36
Thermostat Heat Anticipator Setting
208/230/460/575 v
Stage 1 (amps)		0.98		0.8		0.98	0.98			0.8	0.98
Stage 2 (amps)		0.44		0.44		0.44	0.44			0.44	0.44
Gas Input (Btuh) Stage 1				172,000/230,000					206,000/270,000
Stage 2			225,000/300,000					275,000/360,000
Efficiency (Steady State) (%)			81							81
Temperature Rise Range			15-45/30-60					15-45/20-50
Manifold Pressure (in. wg)
Natural Gas	Std		3.3							3.3
Liquid Propane†††	Alt		3.3							3.3
Gas Valve Quantity			1							1
Gas Valve Pressure Range (Min-Max Allowable) (in. wg)			5.5-13.5					5.5-13.5
(psig)			.235-.487					.235-.487
Field Gas Connection Size (in.-FPT)			3/4							3/4
HIGH-PRESSURE SWITCH (psig)
Cutout						426
Reset (Auto.)						320
LOW-PRESSURE SWITCH (psig)
Cutout						27
Reset (Auto.)						44						581A155
FREEZE PROTECTION THERMOSTAT (F)
Opens						30 ± 5
Closes						45 ± 5
OUTDOOR-AIR INLET SCREENS						Cleanable
Quantity...Size (in.)						2...20 x 25 x 1
						1...20 x 20 x 1						-300
RETURN-AIR FILTERS						Throwaway
Quantity...Size (in.)						4...20 x 20 x 2
						4...16 x 20 x 2

LEGEND

Al — Aluminum

Bhp — Brake Horsepower

Cu — Copper

TXV — Thermostatic Expansion Valve

*Evaporator coil fin material/condenser coil fin material. †Weight of 14-in. roof curb.

**Circuit 1 uses the lower portion of condenser coil and lower portion of evaporator coils, and Circuit 2 uses the upper portion of both coils.

††Due to belt and pulley style, moveable pulley cannot be set to 0 to 1/2 turns open.

***Rollout switch is manual reset.

†††A Liquid Propane kit is available as an accessory. Kit may be used at elevations as high as 2000 ft.

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