Bryant 581A/B manual Cooling CAPACITIES, Units with HOT GAS Reheat Option

PERFORMANCE DATA (cont)

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

581A181 (15 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C ON

Temp (F)								Evaporator Air Quantity — Cfm/BF
Air Entering				4500/0.12			5250/0.14			6000/.015			6750/0.18			7500/0.18
Condenser								Evaporator Air — Relative Humidity (%)
	(Edb)
			50	55	60	50	55	60	50	55	60	50	55	60	50	55	60
		TC	133	140	146	134	141	147	135	142	148	136	143	149	137	144	150
65		SHC	73	69	65	75	71	67	77	73	69	79	75	71	81	76	72
		kW	10.7	10.7	10.8	10.7	10.7	10.8	10.7	10.7	10.8	10.7	10.7	10.8	10.7	10.7	10.8
		TC	116	123	128	117	123	129	117	124	130	118	125	131	118	126	132
75		SHC	61	55	50	63	57	52	65	59	54	66	61	56	68	62	57
		kW	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8
		TC	98	105	111	99	106	112	99	106	112	100	107	113	100	107	113
85		SHC	48	41	35	50	43	37	52	45	39	54	46	40	55	48	42
		kW	12.9	13.0	13.0	12.9	13.0	13.0	12.9	13.0	13.0	12.9	13.0	13.0	12.9	13.0	13.0
		TC	81	88	94	81	88	94	81	88	95	81	89	95	81	89	95
95		SHC	36	28	21	38	29	22	39	31	24	41	32	25	42	34	26
		kW	14.0	14.1	14.1	14.0	14.1	14.1	14.0	14.1	14.1	14.0	14.1	14.1	14.0	14.1	14.1

581A210 (18 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE

Temp (F)												Air Entering Evaporator — Cfm/BF
Air Entering				5400/0.03						6300/0.04					7200/0.05					8100/0.06						9000/0.07
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	183		198	215	236	192		206	224	245	201		212	230	252	210		216		235	257	217		222		240	262
		SHC	182		169	143	120	192		184	156	127	201		197	166	134	210		209		177	141	217		218		186	147
		kW	11.5		11.7	11.9	12.2	11.6		11.8	12.1	12.4	11.7		11.9	12.2	12.5	11.9		11.9		12.2	12.5	12.0		12.0		12.3	12.6
85		TC	179		192	210	231	188		200	217	239	197		205	223	244	205		210		227	249	212		215		232	254
		SHC	179		166	142	117	188		181	153	125	197		194	163	131	205		206		173	138	212		213		183	145
		kW	12.8		13.1	13.3	13.7	13.0		13.2	13.5	13.8	13.2		13.3	13.6	13.9	13.3		13.4		13.7	14.0	13.4		13.5		13.7	14.1
95		TC	175		186	202	223	184		193	209	229	193		198	215	236	200		203		219	241	206		208		223	245
		SHC	175		163	142	114	184		177	151	121	193		191	160	128	200		200		170	135	206		207		180	142
		kW	14.1		14.3	14.6	14.9	14.3		14.4	14.7	15.1	14.4		14.5	14.8	15.2	14.6		14.6		14.9	15.3	14.7		14.7		15.0	15.4
105		TC	170		180	197	215	179		186	201	222	187		192	208	226	194		197		212	230	200		202		215	235
		SHC	170		160	136	111	179		174	147	118	187		186	158	125	194		195		168	131	200		201		178	138
		kW	15.6		15.8	16.1	16.5	15.8		15.9	16.2	16.6	15.9		16.0	16.3	16.7	16.1		16.1		16.4	16.8	16.2		16.2		16.5	16.9
115		TC	165		173	189	208	173		179	195	214	181		184	199	218	187		189		203	222	193		194		205	225
		SHC	165		157	133	109	173		170	144	116	181		181	154	122	187		188		164	128	193		194		173	134
		kW	17.2		17.4	17.7	18.1	17.4		17.5	17.8	18.2	17.5		17.6	17.9	18.3	17.7		17.7		18.0	18.4	17.8		17.9		18.1	18.5
125		TC	159		166	181	199	167		171	186	203	174		177	190	207	180		182		193	210	186		187		196	213
		SHC	159		154	130	105	167		166	140	112	174		175	151	118	180		181		160	124	186		187		170	130
		kW	18.9		19.1	19.5	19.9	19.1		19.2	19.6	20.0	19.3		19.4	19.7	20.1	19.5		19.5		19.8	20.1	19.6		19.6		19.8	20.2
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A IN REHEAT, B AND 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		61		63	65		62		64	66		63		65	66		63		65		67		64		66		68
65		SHC		38		35	34		40		37	35		41		39	37		43		41		39		44		42		40
		kW		5.0		5.0	5.0		5.0		5.0	5.0		5.0		5.0	5.0		5.0		5.0		5.0		5.0		5.0		5.0
		TC		47		48	50		47		49	51		48		50	51		48		50		52		49		51		52
75		SHC		24		21	18		26		23	20		28		25	22		29		26		24		31		28		25
		kW		5.4		5.4	5.4		5.4		5.4	5.4		5.4		5.4	5.4		5.4		5.4		5.4		5.4		5.4		5.4
		TC		32		33	35		32		34	35		33		34	36		33		35		36		34		35		37
85		SHC		11		7	3		13		9	5		14		11	7		16		12		9		17		14		10
		kW		5.9		5.9	5.9		5.9		5.9	5.9		5.9		5.9	5.9		5.9		5.9		5.9		5.9		5.9		5.9
		TC		17		18	19		18		19	20		18		19	20		19		20		21		19		20		21
95		SHC		–3		–8	–12		–1		–6	–10		1		–4	–8		3		–2		–6		4		0		–4
		kW		6.3		6.3	6.3		6.3		6.3	6.3		6.3		6.3	6.3		6.3		6.3		6.3		6.3		6.3		6.3

581A155-300

		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.

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
.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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