Bryant 581A/B manual 158

PERFORMANCE DATA — 579F (cont)

COOLING CAPACITIES (cont)

	579F300 (25 Tons)
	Temp (F)							Evaporator Air Quantity — Cfm
	Air Entering					7,000							8,000
	Condenser							Evaporator Air — Ewb (F)/BF
	(Edb)
			54/0.44	58/0.26	62/0.13	67/0.12	72/0.12	76/0.19	80/0.01	54/0.49	58/0.32	62/0.15	67/0.14	72/0.13	76/0.17	80/0.00
		TC	—	256	270	298	325	349	370	266	268	280	304	324	352	379
	75	SHC	—	243	229	198	164	133	106	266	251	246	209	168	137	107
		kW	—	19.3	20.0	20.3	21.0	21.6	22.2	19.5	19.6	19.9	20.5	20.9	21.8	22.4
		TC	249	251	265	289	315	340	361	260	262	272	294	321	344	367
	85	SHC	249	238	226	194	160	130	103	260	254	243	205	167	135	104
		kW	21.3	21.3	21.7	22.4	23.1	24.3	24.4	21.6	21.6	22.0	22.5	23.3	23.9	24.6
		TC	244	245	257	279	306	328	349	254	256	262	284	310	332	355
	95	SHC	244	230	223	190	156	127	99	254	249	238	201	163	131	100
		kW	23.6	23.5	24.1	24.6	25.6	26.2	26.7	23.8	23.9	24.1	24.8	25.5	26.2	26.9
		TC	237	238	247	269	293	315	336	246	247	253	274	298	319	343
	105	SHC	237	233	218	185	152	122	95	246	245	233	197	159	127	96
		kW	25.9	25.9	26.3	27.0	27.8	28.5	29.2	26.3	26.3	26.5	27.2	28.0	28.7	29.5
		TC	229	231	237	258	283	302	322	238	239	243	264	286	306	328
	115	SHC	229	225	213	181	148	119	91	238	239	228	193	155	123	91
		kW	28.6	28.6	28.9	29.6	30.3	31.2	31.9	28.9	28.9	29.1	29.7	30.6	31.4	32.1
		TC	228	230	236	256	279	299	—	237	237	241	260	283	304	—
	117	SHC	228	225	212	180	147	118	—	237	237	227	192	154	122	—
		kW	29.1	29.1	29.4	30.2	31.0	31.7	—	29.4	29.5	29.6	30.4	31.2	31.9	—
		TC	226	226	232	252	276	—	—	234	234	238	257	280	—	—
	120	SHC	226	225	211	179	145	—	—	234	234	225	190	152	—	—
		kW	30.0	30.0	30.3	30.9	31.8	—	—	30.3	30.3	30.5	31.1	32.0	—	—
	579F300 (25 Tons) (cont)
	Temp (F)							Evaporator Air Quantity — Cfm
	Air Entering					9,000							10,000
300-	Condenser							Evaporator Air — Ewb (F)/BF
	(Edb)
			54/0.53	58/0.37	62/0.18	67/0.15	72/0.14	76/0.17	80/0.00	54/0.57	58/0.41	62/0.23	67/0.16	72/0.15	76/0.17	80/0.00
579F180	75	TC	277	276	286	310	336	361	385	286	284	291	314	341	365	390
		kW	22.2	21.9	22.1	22.7	23.4	24.1	24.8	22.1	22.1	22.2	22.8	23.6	24.2	24.9
		SHC	277	269	261	221	178	142	108	286	284	274	232	186	147	108
		kW	19.8	19.5	20.0	20.6	21.3	22.0	22.6	20.0	20.2	20.2	20.8	21.5	22.1	22.7
		TC	271	272	277	300	326	349	373	278	278	282	304	330	354	378
	85	SHC	271	264	257	217	175	139	104	278	278	269	228	182	143	105
		TC	263	263	268	289	316	337	360	270	270	273	293	319	341	364
	95	SHC	263	263	251	213	171	135	100	270	270	262	223	177	139	101
		kW	24.1	24.1	24.3	24.9	25.9	26.4	27.1	24.4	24.4	24.4	25.1	25.8	26.5	27.2
		TC	255	255	258	278	302	326	346	261	262	264	282	306	328	352
	105	SHC	255	255	246	208	166	132	96	261	262	254	219	173	135	97
		kW	26.5	26.5	26.6	27.3	28.1	29.0	29.6	26.8	26.8	26.9	27.5	28.3	29.0	29.8
		TC	247	246	249	267	290	311	—	253	253	255	270	293	315	—
	115	SHC	247	246	239	204	162	127	—	253	253	245	214	168	131	—
		kW	29.1	29.2	29.3	30.0	30.8	31.5	—	29.3	29.3	29.6	30.1	30.9	31.7	—
		TC	244	244	247	265	288	308	—	251	251	253	268	291	—	—
	117	SHC	244	244	237	203	161	126	—	251	251	243	213	168	—	—
		kW	29.7	29.7	29.8	30.4	31.3	32.1	—	30.0	30.0	30.0	30.6	31.4	—	—
		TC	241	242	244	261	—	—	—	248	248	250	264	—	—	—
	120	SHC	241	242	235	201	—	—	—	248	248	239	212	—	—	—
		kW	30.6	30.6	30.7	31.3	—	—	—	30.8	30.8	31.0	31.5	—	—	—

		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 evaporator 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
0.05	1.04	2.07	3.11	4.14	5.18
0.10	0.98	1.96	2.94	3.92	4.91
0.20	0.87	1.74	2.62	3.49	4.36
0.30	0.76	1.53	2.29	3.05	3.82	Use formula
0.40	0.65	1.31	1.96	2.62	3.27	shown below.
0.50	0.55	1.09	1.64	2.18	2.73
0.60	0.44	0.87	1.31	1.74	2.18
0.70	0.33	0.65	0.98	1.31	1.64

Interpolation is permissible.

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

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