Bryant 581A/B manual 154

PERFORMANCE DATA — 579F (cont)

COOLING CAPACITIES (cont)

	579F216 (18 Tons)
	Temp (F)							Evaporator Air Quantity — Cfm
	Air Entering					5400							6000
	Condenser							Evaporator Air — Ewb (F)/BF
	(Edb)
			54/0.49	58/0.31	62/0.20	67/0.18	72/0.16	76/0.19	80/0.05	54/0.53	58/0.35	62/0.23	67/0.19	72/0.17	76/0.19	80/0.05
		TC	194	198	206	223	243	260	277	200	203	210	227	246	263	—
	75	SHC	194	178	169	146	121	99	79	200	191	177	152	125	102	—
		kW	13.6	13.7	13.9	14.2	14.6	15.0	15.2	13.7	13.8	14.0	14.4	14.7	15.1	—
		TC	189	192	200	217	235	252	269	195	195	204	220	239	255	—
	85	SHC	189	176	166	143	118	97	76	195	195	174	149	123	100	—
		kW	15.1	15.2	15.4	15.9	16.3	16.6	16.9	15.3	15.3	15.7	16.0	16.4	16.8	—
		TC	183	184	193	209	227	243	—	189	190	196	212	230	246	—
	95	SHC	183	181	162	140	115	94	—	189	190	170	146	120	97	—
		kW	16.8	16.8	17.1	17.6	18.0	18.4	—	17.0	17.0	17.2	17.6	18.1	18.5	—
		TC	177	178	185	201	218	234	—	183	185	189	204	221	237	—
	105	SHC	177	178	159	137	112	91	—	183	185	166	143	116	94	—
		kW	18.6	18.6	18.8	19.3	19.8	20.2	—	18.8	18.6	18.9	19.4	19.9	20.3	—
		TC	171	171	177	192	209	224	—	176	177	181	195	212	226	—
	115	SHC	171	171	154	133	109	88	—	176	177	161	139	113	90	—
		kW	20.5	20.5	20.7	21.2	21.8	22.1	—	20.7	20.7	20.8	21.3	21.8	22.2	—
		TC	170	170	176	191	207	222	—	175	175	180	193	210	224	—
	117	SHC	170	170	154	132	108	87	—	175	175	160	138	112	90	—
		kW	20.9	20.9	21.1	21.6	22.1	22.5	—	21.1	21.1	21.2	21.7	22.2	22.6	—
		TC	168	168	173	188	204	—	—	173	173	177	191	207	—	—
	120	SHC	168	168	152	131	107	—	—	173	173	159	137	111	—	—
		kW	21.5	21.5	21.7	22.2	22.7	—	—	21.7	21.7	21.8	22.3	22.8	—	—
	579F216 (18 Tons) (cont)
	Temp (F)							Evaporator Air Quantity — Cfm
	Air Entering					7000							8000
300-	Condenser							Evaporator Air — Ewb (F)/BF
	(Edb)
			54/0.58	58/0.42	62/0.29	67/0.21	72/0.20	76/0.20	80/0.05	54/0.62	58/0.48	62/0.36	67/0.23	72/0.22	76/0.21	80/0.04
579F180	75	TC	209	209	215	232	251	268	—	216	217	221	236	255	272	—
		kW	15.5	15.5	15.7	16.1	16.5	16.9	—	15.7	15.7	15.8	16.2	16.6	17.0	—
		SHC	209	209	189	162	132	106	—	216	217	198	171	138	109	—
		kW	13.9	13.9	14.1	14.5	14.9	15.2	—	14.1	14.1	14.2	14.5	15.0	15.3	—
		TC	203	204	209	224	243	260	—	211	211	215	228	247	263	—
	85	SHC	203	204	185	159	129	103	—	211	211	192	168	135	107	—
		TC	197	197	202	216	235	251	—	204	204	209	220	238	254	—
	95	SHC	197	197	180	156	126	100	—	204	204	185	165	132	104	—
		kW	17.2	17.2	17.4	17.8	18.2	18.7	—	17.4	17.4	17.6	17.9	18.3	18.7	—
		TC	191	191	195	208	225	241	—	197	197	202	211	228	244	—
	105	SHC	191	191	175	152	123	97	—	197	197	177	161	128	100	—
		kW	19.0	19.0	19.2	19.5	20.0	20.5	—	19.2	19.2	19.3	19.6	20.1	20.6	—
		TC	184	184	188	199	215	230	—	190	190	194	202	218	—	—
	115	SHC	184	184	168	149	119	94	—	190	190	170	158	125	—	—
		kW	21.0	21.0	21.1	21.5	22.0	22.4	—	21.1	21.1	21.2	21.6	22.1	—	—
		TC	183	183	187	197	214	228	—	188	188	192	200	216	—	—
	117	SHC	183	183	166	148	118	93	—	188	188	171	157	124	—	—
		kW	21.3	21.4	21.5	21.8	22.4	22.7	—	21.5	21.5	21.7	22.0	22.5	—	—
		TC	180	180	185	194	210	—	—	186	186	190	197	—	—	—
	120	SHC	180	180	163	147	117	—	—	186	186	172	156	—	—	—
		kW	21.9	22.0	22.1	22.4	23.0	—	—	22.1	22.1	22.2	22.5	—	—	—

		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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