Bryant 581A/B manual 581A300 25 Tons Unit with HOT GAS Reheat in Cooling Mode

PERFORMANCE DATA (cont)

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

581A300 (25 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE

Temp (F)													Air Entering Evaporator — Cfm/BF
Air Entering				7000/0.042						8250/0.052						9500/0.062						10,750/0.072						12,000/0.082
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	245		268	293	318	259			282	303	333	274		291		314	340	289		301		322	348	305		309			332	356
		SHC	245		229	197	162	259			254	213	173	274		271		230	183	289		287		247	195	305		298			267	203
		kW	16.4		17.0	17.6	18.2	16.7			17.4	17.9	18.6	17.1		17.6		18.2	18.8	17.5		17.8		18.4	19.0	18.0		18.1			18.6	19.2
85		TC	233		259	278	309	256			273	293	324	271		282		305	330	285		290		312	337	298		303			321	343
		SHC	233		228	186	158	256			252	211	171	271		264		229	180	285		276		246	191	298		295			261	201
		kW	17.9		18.7	19.3	19.9	18.5			19.1	19.7	20.4	19.0		19.4		20.0	20.8	19.3		19.6		20.2	21.1	19.8		19.9			20.4	21.3
95		TC	230		252	276	303	251			265	284	314	269		274		290	326	274		282		300	332	283		293			308	334
		SHC	230		225	191	156	251			249	202	166	269		269		220	181	274		274		238	190	283		280			259	197
		kW	20.0		20.8	21.4	22.1	20.7			21.2	21.5	22.4	21.3		21.4		21.9	23.0	21.5		21.7		22.1	23.2	21.6		22.0			22.5	23.3
105		TC	226		245	268	292	242			253	277	301	255		264		284	308	266		275		290	314	278		281			294	319
		SHC	226		223	188	153	242			241	205	163	255		255		221	171	265		265		240	185	278		278			253	194
		kW	22.0		22.8	23.3	24.3	22.7			23.1	23.7	24.7	23.1		23.4		24.0	25.0	23.6		23.7		24.3	25.2	24.0		24.1			24.4	25.4
115		TC	221		233	258	281	232			242	267	290	247		253		274	297	253		260		275	302	267		269			279	306
		SHC	221		217	183	149	232			230	200	160	247		246		217	170	253		254		233	179	267		267			248	189
		kW	24.3		25.1	25.7	26.7	24.8			25.4	26.1	27.1	25.3		25.8		26.4	27.2	25.8		26.0		26.5	27.3	26.1		26.3			26.7	27.4
125		TC	216		223	247	268	225			230	253	275	237		240		256	280	247		248		260	285	254		255			263	288
		SHC	216		212	181	145	225			223	196	155	237		236		211	163	247		247		228	174	254		254			242	184
		kW	26.9		27.1	28.0	29.0	27.4			27.5	28.3	29.4	27.8		27.9		28.5	29.6	28.2		28.3		28.7	29.8	28.5		28.6			28.9	29.9
581A300 (25 TONS) UNIT WITH HOT GAS REHEAT — A IN REHEAT, B OFF
Temp (F)													Evaporator Air Quantity — Cfm/BF
Air Entering				7500/0.045						8250/0.055						9500/0.065						10,750/0.075						12,000/0.085
Condenser													Evaporator Air — Relative Humidity (%)
	(Edb)
				50		55	60			50		55	60		50		55		60		50		55		60		50			55		60
		TC		79		83	87			80		84	88		81		85		89		82		86		90		83			87		91
65		SHC		39		33	28			41		35	30		43		37		32		45		39		34		47			41		36
		kW		11		11	11			11		11	11		11		11		11		11		11		11		11			11		11
		TC		56		61	65			57		62	66		59		63		67		60		64		68		61			65		69
75		SHC		18		11	5			20		12	6		22		15		8		24		16		10		26			18		12
		kW		11		11	11			11		11	11		11		11		11		11		11		11		11			11		11
		TC		34		38	42			35		39	43		37		41		45		38		42		46		39			43		47
85		SHC		–2		–11	–19			–1		–10	–18		1			–8	–16		3			–7	–14		4			–5		–13
		kW		11		11	12			11		12	12		12		12		12		12		12		12		12			12		12
		TC		12		16	19			13		17	21		15		19		22		16		20		24		17			22		25
95		SHC		–23		–33	–42		–22			–32	–41		–20		–31		–40		–19		–30		–39		–17		–28			–38
		kW		12		12	12			12		12	12		12		12		12		12		12		12		12			12		12
581A300 (25 TONS) UNIT WITH HOT GAS REHEAT — A IN REHEAT, B ON
Temp (F)													Evaporator Air Quantity — Cfm/BF
Air Entering				7500/0.045						8250/0.055						9500/0.065						10,750/0.075						12,000/0.085
Condenser													Evaporator Air — Relative Humidity (%)
	(Edb)
				50		55	60			50		55	60		50		55		60		50		55		60		50			55		60
		TC		211		222	231		215			226	235		220		232		241		226		237		247		230			242		252
65		SHC		123		115	109		129			121	115		139		131		124		147		139		133		155			147		140
		kW		19		19	20			19		19	20		19		19		20		19		20		20		19			20		20
		TC		182		193	202		185			196	205		189		200		210		192		204		214		196			208		218
75		SHC		103		93	85		110			100	91		120		110		101		128		118		110		136			126		118
		kW		20		21	21			20		21	21		21		21		21		21		21		21		21			21		21
		TC		153		164	174		155			166	176		157		169		178		159		171		181		161			173		184
85		SHC		84		72	62			90		78	68		100		88		78		110		97		87		118			106		95
		kW		22		22	22			22		22	22		22		22		22		22		22		22		22			22		22
		TC		124		135	145		125			136	146		125		137		147		126		138		148		127			139		149
95		SHC		64		50	38			71		57	45		81		67		55		91		76		64		99			85		72
		kW		23		23	23			23		23	23		23		23		24		23		23		24		23			24		24

		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)

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.

								581A155
BYPASS		ENTERING AIR DRY-BULB TEMP (F)
	79	78	77		76	75	under 75
FACTOR
	81	82	83		84	85	over 85
(BF)
				Correction Factor				-300
.05	1.04	2.07	3.11		4.14	5.18	Use formula
.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).

total capacity (Btuh)

hlwb = hewb –4.5 x cfm

Where: hewb = Enthalpy of air entering evaporator coil

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