Bryant 581A/B manual 212

PERFORMANCE DATA (cont)

COOLING CAPACITIES — STANDARD UNITS (cont)

581A300 (25 Tons)

Temp (F)											Evap Air — Cfm/BF
				7,500/0.05							8,250/0.06							9,500/0.07
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	287	296	304	331	359	385	408	297	304	310	336	367	390	414	311	315	319	345	375	398	421
60	SHC	287	274	261	220	178	145	110	297	285	273	229	185	148	110	311	303	294	246	194	152	111
	kW	15.5	15.7	15.9	16.5	17.3	17.9	18.6	15.7	15.9	16	16.7	17.4	18.1	18.7	16	16.1	16.2	16.9	17.6	18.3	19
	TC	279	286	293	318	345	367	392	288	293	298	323	350	372	397	301	303	306	329	357	381	403
70	SHC	279	267	255	214	173	139	105	288	278	268	224	178	142	105	301	294	287	239	188	147	105
	kW	17	17.2	17.3	18	18.7	19.3	20	17.2	17.3	17.5	18.1	18.8	19.4	20.1	17.5	17.6	17.7	18.3	19	19.7	20.3
	TC	275	281	287	311	338	360	383	283	288	293	316	343	365	388	296	298	300	323	349	372	394
75	SHC	275	264	252	212	170	136	102	283	274	265	221	176	139	103	296	290	284	237	185	144	103
	kW	17.9	18.1	18.2	18.8	19.5	20.1	20.8	18.1	18.2	18.4	18.9	19.7	20.3	20.9	18.4	18.5	18.5	19.1	19.8	20.5	21.1
	TC	267	272	277	299	324	345	366	274	278	282	304	329	350	370	286	287	289	311	334	355	375
85	SHC	267	257	247	207	165	131	97.3	274	267	259	216	171	134	97.3	286	282	278	232	180	139	97.3
	kW	19.8	19.9	20	20.6	21.2	21.8	22.4	20	20.1	20.1	20.7	21.4	22	22.6	20.2	20.3	20.3	20.9	21.5	22.1	22.7
	TC	259	263	267	288	311	331	350	267	270	273	293	315	335	354	278	279	281	299	322	340	358
95	SHC	259	251	242	202	160	126	92.5	267	261	255	212	166	129	92.5	278	276	273	227	175	134	92.4
	kW	22.1	22.2	22.3	22.8	23.4	23.9	24.5	22.3	22.4	22.5	22.9	23.5	24	24.6	22.6	22.6	22.6	23.1	23.6	24.2	24.7
	TC	253	256	260	279	301	318	335	260	262	264	282	304	322	338	269	270	270	287	308	326	342
105	SHC	253	246	239	198	156	122	87.9	260	255	250	207	162	125	87.8	269	268	267	222	171	129	87.7
	kW	24.9	25	25.1	25.4	25.9	26.4	26.9	25.1	25.1	25.1	25.5	26	26.5	26.9	25.2	25.2	25.2	25.6	26.1	26.6	27.1
	TC	246	249	252	270	291	305	320	253	255	256	274	294	309	323	262	262	262	277	298	312	328
115	SHC	246	240	235	195	152	118	83.5	253	250	246	204	158	121	83.4	262	261	261	218	167	125	83.9
	kW	28.1	28.2	28.3	28.6	29	29.3	29.6	28.3	28.3	28.3	28.6	29	29.4	29.7	28.4	28.4	28.4	28.7	29.1	29.4	29.9
	TC	238	240	242	259	279	293	305	245	246	246	262	281	295	310	253	253	253	266	284	298	313
125	SHC	238	234	230	190	148	114	79.2	245	243	240	199	153	116	79.7	253	253	253	214	162	120	79.9
	kW	31.6	31.7	31.7	32	32.4	32.6	32.9	31.8	31.8	31.8	32.1	32.4	32.7	33	31.9	31.9	31.9	32.1	32.5	32.7	33.1
581A300 (25 Tons) (cont)
Temp (F)							Evap Air — Cfm/BF
				10,750/0.08							12,000/0.09
Air Ent
							Evap Air — Ewb (F)
Cond
		54	58	62	67	72	76	80	54	58	62	67	72	76	80
	TC	322	324	327	351	380	404	429	332	333	334	357	386	410	432
60	SHC	322	317	313	260	203	157	111	332	330	329	276	212	162	111
	kW	16.3	16.4	16.4	17	17.8	18.5	19.2	16.6	16.6	16.6	17.2	18	18.6	19.2
	TC	311	312	314	336	364	386	408	320	320	321	341	368	392	414
70	SHC	311	308	305	255	198	151	105	320	320	319	269	206	156	106
	kW	17.8	17.8	17.9	18.4	19.2	19.8	20.5	18	18	18	18.5	19.3	20	20.6
	TC	306	307	308	329	356	378	398	315	315	315	333	360	383	404
75	SHC	306	304	302	252	195	149	103	315	314	314	266	203	153	103
	kW	18.7	18.7	18.7	19.3	20	20.6	21.3	18.9	18.9	18.9	19.4	20.1	20.8	21.4
	TC	295	296	297	315	340	362	379	303	303	303	319	344	365	385
85	SHC	295	295	294	246	189	144	97.3	303	303	303	260	198	148	97.9
	kW	20.5	20.5	20.5	21	21.7	22.3	22.8	20.7	20.7	20.7	21.1	21.8	22.4	23
	TC	286	286	286	303	327	344	364	293	293	294	307	330	347	366
95	SHC	286	286	286	241	185	138	93	293	293	294	255	193	142	92.8
	kW	22.7	22.7	22.7	23.1	23.8	24.3	24.9	22.9	22.9	22.9	23.2	23.9	24.4	24.9
	TC	277	277	277	290	312	329	347	284	284	285	295	314	331	352
105	SHC	277	277	277	236	179	133	88.3	284	284	285	250	188	137	88.7
	kW	25.4	25.4	25.4	25.7	26.2	26.7	27.2	25.5	25.6	25.6	25.8	26.3	26.7	27.3
	TC	268	269	269	281	300	315	332	274	274	275	283	303	317	333
115	SHC	268	269	269	232	176	129	84.4	274	274	275	245	184	133	84
	kW	28.5	28.5	28.5	28.7	29.2	29.5	30	28.6	28.6	28.6	28.8	29.2	29.5	30
	TC	260	259	259	269	287	300	316	265	265	264	271	289	302	318
125	SHC	260	259	259	227	171	125	80	265	265	264	240	179	129	80.1
	kW	32	32	32	32.1	32.5	32.8	33.2	32.1	32.1	32.1	32.2	32.5	32.8	33.3

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:

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
7,500	0.407	0.208	0.097	0.104	0.123	0.000	0.000
8,250	0.443	0.256	0.110	0.112	0.128	0.000	0.000
9,500	0.494	0.324	0.138	0.123	0.136	0.000	0.000
10,750	0.536	0.380	0.181	0.134	0.145	0.000	0.000
12,000	0.571	0.427	0.232	0.145	0.154	0.000	0.000

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