Bryant 581A/B manual 211

PERFORMANCE DATA (cont)

COOLING CAPACITIES — STANDARD UNITS (cont)

581A240 (20 Tons)

Temp (F)											Evap Air — Cfm/BF
				6,000/0.04							7,000/0.05							8,000/0.05
Air Ent
											Evap Air — Ewb (F)
Cond
		54	58	62	67	72	76	80	54	58	62	67	72	76	80	54	58	62	67	72	76	80
	TC	235	242	248	267	288	306	323	247	251	256	274	296	312	330	257	259	262	279	300	317	333
60	SHC	235	224	212	178	143	115	86.6	247	238	230	191	151	119	87	257	251	246	204	159	123	86.7
	kW	11.5	11.6	11.7	12	12.4	12.7	13	11.7	11.8	11.8	12.1	12.5	12.8	13.1	11.9	11.9	11.9	12.2	12.6	12.9	13.1
	TC	231	237	242	261	282	300	316	242	246	250	268	289	305	323	252	254	256	273	293	310	326
70	SHC	231	220	209	175	141	113	84.5	242	234	227	189	149	117	84.9	252	247	243	201	156	120	84.6
	kW	13.1	13.2	13.3	13.6	14	14.3	14.6	13.3	13.3	13.4	13.7	14.1	14.4	14.8	13.4	13.5	13.5	13.8	14.2	14.5	14.8
	TC	228	234	239	257	278	295	311	239	243	246	264	285	301	318	249	250	252	269	290	305	322
75	SHC	228	218	208	174	139	112	83.1	239	232	225	187	147	115	83.6	249	245	241	199	155	119	83.5
	kW	13.9	14	14.1	14.5	14.9	15.2	15.6	14.1	14.2	14.2	14.6	15	15.3	15.7	14.3	14.3	14.4	14.7	15.1	15.4	15.8
	TC	223	227	231	250	270	287	303	234	236	238	256	277	292	310	243	244	245	261	282	296	314
85	SHC	223	213	204	171	136	109	80.5	234	227	221	184	144	112	80.9	243	240	236	196	152	116	81.3
	kW	15.6	15.7	15.8	16.2	16.6	17.1	17.4	15.8	15.9	15.9	16.3	16.8	17.2	17.6	16	16.1	16.1	16.5	16.9	17.3	17.7
	TC	216	219	223	241	260	277	292	226	228	230	247	267	282	298	235	235	236	251	272	285	303
95	SHC	216	208	200	167	132	105	77.2	226	221	217	180	141	109	77.7	235	233	231	192	148	112	78
	kW	17.4	17.5	17.6	18.1	18.6	19	19.4	17.7	17.7	17.8	18.2	18.7	19.1	19.6	17.9	17.9	17.9	18.3	18.9	19.2	19.7
	TC	208	211	214	231	249	265	279	218	219	220	236	256	270	285	226	226	226	241	260	273	290
105	SHC	208	202	195	163	129	101	73.6	218	215	212	176	137	105	74	226	226	225	188	145	108	74.4
	kW	19.3	19.4	19.5	20	20.6	21	21.5	19.6	19.6	19.7	20.2	20.8	21.2	21.6	19.9	19.9	19.9	20.3	20.9	21.3	21.8
	TC	200	202	204	220	237	253	266	209	210	210	225	243	257	271	217	217	217	229	248	260	275
115	SHC	200	195	190	158	124	97.2	69.5	209	207	206	171	132	101	70	217	217	217	183	140	104	70.4
	kW	21.3	21.4	21.5	22	22.7	23.2	23.6	21.7	21.7	21.7	22.2	22.9	23.3	23.8	21.9	21.9	21.9	22.4	23	23.4	23.9
	TC	191	192	193	208	224	239	251	199	199	200	212	230	243	255	207	207	206	216	232	245	257
125	SHC	191	188	185	153	120	92.8	65.3	199	199	199	166	128	96.4	65.7	207	207	206	178	135	99.8	65.5
	kW	23.5	23.5	23.6	24.2	24.8	25.4	25.9	23.8	23.8	23.8	24.4	25	25.5	26	24.1	24.1	24.1	24.5	25.1	25.7	26.1
581A240 (20 Tons) (cont)
Temp (F)							Evap Air — Cfm/BF
				9,000/0.06							10,000/0.07
Air Ent
							Evap Air — Ewb (F)
Cond
		54	58	62	67	72	76	80	54	58	62	67	72	76	80
	TC	265	266	267	284	305	321	338	272	272	272	287	307	325	340
60	SHC	265	262	260	216	166	126	87	272	271	271	227	173	130	86.7
	kW	12	12	12	12.3	12.7	12.9	13.2	12.1	12.1	12.1	12.4	12.7	13	13.3
	TC	260	261	261	277	298	315	331	266	267	267	281	301	317	333
70	SHC	260	258	256	213	164	124	85	266	267	267	225	171	127	84.7
	kW	13.6	13.6	13.6	13.9	14.3	14.6	14.9	13.7	13.7	13.7	14	14.3	14.6	15
	TC	256	257	258	273	294	310	326	263	263	263	277	296	312	327
75	SHC	256	255	254	211	162	123	83.7	263	263	263	223	169	126	83.4
	kW	14.5	14.5	14.5	14.8	15.2	15.5	15.8	14.6	14.6	14.6	14.9	15.2	15.6	15.9
	TC	250	250	250	265	285	301	316	257	256	256	268	287	303	317
85	SHC	250	250	249	208	159	120	81	257	256	256	220	166	123	80.7
	kW	16.2	16.2	16.2	16.5	17	17.4	17.7	16.4	16.4	16.4	16.6	17	17.4	17.7
	TC	242	242	242	255	274	288	304	248	248	248	258	276	292	306
95	SHC	242	242	242	204	155	116	77.8	248	248	248	215	162	120	77.6
	kW	18.1	18.1	18.1	18.4	18.9	19.3	19.7	18.3	18.3	18.2	18.5	19	19.4	19.7
	TC	233	233	233	244	263	275	291	239	239	239	247	264	279	291
105	SHC	233	233	233	200	152	112	74.2	239	239	239	211	158	116	73.9
	kW	20.1	20.1	20.1	20.4	21	21.4	21.8	20.3	20.2	20.2	20.5	21	21.5	21.8
	TC	223	223	223	232	250	262	276	229	228	228	235	251	263	276
115	SHC	223	223	223	195	147	108	70.2	229	228	228	206	154	111	69.9
	kW	22.2	22.1	22.1	22.5	23.1	23.5	24	22.3	22.3	22.3	22.6	23.1	23.6	24
	TC	213	212	212	219	234	247	258	218	217	217	222	235	248	259
125	SHC	213	212	212	189	142	103	65.4	218	217	217	200	148	106	65.2
	kW	24.3	24.3	24.3	24.6	25.2	25.7	26.2	24.5	24.5	24.5	24.7	25.3	25.8	26.2

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:

tldb	= tedb –			sensible capacity (Btuh)
					1.10 x cfm
tlwb	= Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
		rator coil (hlwb)
hlwb		= hewb	–		total capacity (Btuh)
					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)
	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
.10	.98	1.96	2.94	3.92	4.90	Use formula
.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).

4. Use chart below for bypass factor.

			ENTERING WET-BULB (F)
CFM	54	58	62	67	72	76	80
			Bypass Factor
6,000	0.386	0.197	0.108	0.109	0.134	0.000	0.000
7,000	0.444	0.260	0.131	0.121	0.138	0.000	0.000
8,000	0.492	0.321	0.163	0.133	0.145	0.000	0.000
9,000	0.532	0.375	0.205	0.146	0.154	0.000	0.000
10,000	0.566	0.420	0.245	0.158	0.164	0.000	0.000

581A155-300

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