Bryant 581A/B manual 300, 581A240 20 Tons Unit with HOT GAS Reheat in Cooling Mode

PERFORMANCE DATA (cont)

COOLING CAPACITIES, UNITS WITH HOT GAS REHEAT OPTION (cont)

581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C OFF

Temp (F)													Evaporator Air Quantity — Cfm/BF
Air Entering				5400/0.03						6300/0.04						7200/0.05						8100/0.06						9000/0.07
Condenser													Evaporator Air — Relative Humidity (%)
	(Edb)
				50		55	60			50		55	60		50		55		60		50		55		60		50			55		60
		TC		90		93	95			91		94	97		92		95		98		93		96		99		94			97		100
65		SHC		38		35	33			40		37	35		41		39		37		43		40		38		44			42		40
		kW		8.8		8.8	8.8			8.8		8.8	8.8		8.8		8.8		8.8		8.8		8.8		8.8		8.8			8.8		8.8
		TC		68		71	73			69		72	74		70		73		75		71		74		76		72			74		77
75		SHC		24		21	18			26		23	20		28		25		22		30		26		23		31			28		25
		kW		9.6		9.6	9.6			9.6		9.6	9.6		9.6		9.6		9.6		9.6		9.6		9.6		9.6			9.6		9.6
		TC		47		49	51			47		50	52		48		50		52		49		51		53		49			51		53
85		SHC		11		7	3			13		9	5		15		11		7		17		12		9		18			14		10
		kW		10.3		10.3	10.3		10.3			10.3	10.3		10.3		10.3		10.3		10.3		10.3		10.3		10.3		10.3			10.3
		TC		25		27	29			26		27	29		26		28		29		26		28		30		27			29		30
95		SHC		–2		–8	–12			0		–5	–10		2			–-3		–8	3		–2			–6	5			0		–5
		kW		11.1		11.1	11.1		11.1			11.1	11.1		11.1		11.1		11.1		11.1		11.1		11.1		11.1		11.1			11.1
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C ON
Temp (F)													Evaporator Air Quantity — Cfm/BF
Air Entering				5400/0.03						6300/0.04						7200/0.05						8100/0.06						9000/0.07
Condenser													Evaporator Air — Relative Humidity (%)
	(Edb)
				50		55	60			50		55	60		50		55		60		50		55		60		50			55		60
		TC		147		155	162		148			157	164		150		158		165		151		160		167		152			161		168
65		SHC		81		76	72			84		79	75		86		81		77		88		83		79		90			85		80
		kW		11.9		12.0	12.0		11.9			12.0	12.0		11.9		12.0		12.0		11.9		12.0		12.0		11.9		12.0			12.0
		TC		128		136	143		129			137	144		130		138		146		131		139		147		132			140		148
75		SHC		67		61	56			70		63	58		72		65		60		74		67		62		76			69		63
		kW		13.2		13.2	13.2		13.2			13.2	13.2		13.2		13.2		13.2		13.2		13.2		13.2		13.2		13.2			13.2
		TC		108		117	124		109			118	125		110		118		126		110		119		127		111			120		127
85		SHC		54		46	39			56		48	41		58		50		43		60		52		45		61			53		46
		kW		14.5		14.5	14.5		14.5			14.5	14.5		14.5		14.5		14.5		14.5		14.5		14.5		14.5		14.5			14.5
		TC		89		98	105			89		98	106		89		98		106		90		99		107		90			99		107
95		SHC		40		31	23			42		33	25		44		34		26		45		36		28		47			37		29
		kW		15.8		15.7	15.7		15.8			15.7	15.7		15.8		15.7		15.7		15.8		15.7		15.7		15.8		15.7			15.7
581A240 (20 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE
Temp (F)													Air Entering Evaporator — Cfm/BF
Air Entering				6000/0.04						7000/0.05						8000/0.06						9000/0.07						10,000/0.08
Condenser													Air Entering Evaporator — Ewb (F)
(Edb)
			57		62	67	72	57			62	67	72	57		62		67		72	57	62		67		72	57	62			67	72
75		TC	216		234	255	279	226			243	265	290	237		251		273		298	247	256		279		305	256	263			284	310
		SHC	213		199	171	141	225			217	185	151	237		232		198		159	247	241		211		168	256	251			223	176
		kW	13.9		14.2	14.6	15.0	14.0			14.4	14.8	15.3	14.3		14.5		15.0		15.4	14.5	14.6		15.1		15.6	14.6	14.8			15.2	15.7
85		TC	211		227	249	272	221			237	258	282	232		243		265		287	242	250		270		293	250	255			275	300
		SHC	209		194	168	141	221			214	182	148	232		228		195		155	242	237		206		163	250	244			220	173
		kW	15.4		15.8	16.2	16.7	15.7			16.0	16.4	16.9	15.9		16.1		16.6		17.1	16.1	16.3		16.7		17.2	16.3	16.4			16.8	17.4
95		TC	207		220	240	262	217			228	250	269	228		235		254		278	236	241		259		286	243	247			264	290
		SHC	205		192	164	134	217			209	179	142	228		222		190		152	236	230		202		161	243	236			214	169
		kW	17.2		17.5	17.9	18.4	17.4			17.7	18.2	18.6	17.7		17.9		18.3		18.8	17.9	18.0		18.4		19.0	18.1	18.2			18.6	19.1
105		TC	201		214	232	253	211			221	238	261	221		228		247		266	229	234		251		271	236	239			255	278
		SHC	197		190	161	131	211			206	172	140	221		216		188		146	229	223		200		155	236	229			212	165
		kW	19.0		19.3	19.8	20.3	19.3			19.5	20.0	20.6	19.5		19.7		20.2		20.7	19.8	19.9		20.3		20.8	20.0	20.0			20.4	21.0
115		TC	195		206	224	245	205			213	230	252	214		219		236		258	221	225		240		262	228	231			243	265
		SHC	191		185	158	129	205			201	171	137	214		209		183		145	221	215		194		152	228	221			207	160
		kW	21.0		21.3	21.8	22.4	21.3			21.5	22.0	22.7	21.6		21.7		22.2		22.8	21.8	21.9		22.3		22.9	22.0	22.1			22.4	23.0
125		TC	189		198	215	235	198			204	221	239	207		210		225		244	214	216		229		248	220	222			232	251
		SHC	184		179	154	125	198			194	167	132	207		201		179		139	214	207		191		147	220	212			202	154
		kW	23.1		23.4	24.0	24.7	23.5			23.7	24.2	24.8	23.8		23.9		24.4		25.0	24.0	24.1		24.5		25.1	24.2	24.3			24.6	25.2

		LEGEND
BF	— Bypass Factor
Edb	—	Entering Dry-Bulb
Ewb —		Entering Wet-Bulb
kW	—	Compressor Motor Power Input
ldb	—	Leaving Dry-Bulb
lwb	—	Leaving Wet-Bulb
SHC —		Sensible Heat Capacity (1000 Btuh) Gross
TC	—	Total Capacity (1000 Btuh) Gross

NOTES:

1.Direct interpolation is permissible. Do not extrapolate.

2.The following formulas may be used:

sensible capacity (Btuh)

tldb = tedb –1.10 x cfm

tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evapo- rator coil (hlwb)

total capacity (Btuh)

hlwb = hewb –4.5 x cfm

Where: hewb = Enthalpy of air entering evaporator coil

3.The SHC is based on 80 F edb temperature of air entering evaporator coil. Below 80 F edb, subtract (corr factor x cfm) from SHC.

Above 80 F edb, add (corr factor x cfm) to SHC.

BYPASS		ENTERING AIR DRY-BULB TEMP (F)						581A155
	79	78	77		76	75	under 75
FACTOR
(BF)	81	82	83		84	85	over 85
				Correction Factor
.05	1.04	2.07	3.11		4.14	5.18	Use formula	-300
.10	.98	1.96	2.94		3.92	4.90
.20	.87	1.74	2.62		3.49	4.36	shown below.
.30	.76	1.53	2.29		3.05	3.82

Interpolation is permissible.

Correction Factor = 1.10 x (1 – BF) x (edb – 80).

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