Performance Data 579F, Cooling Capacities

						PERFORMANCE DATA — 579F (cont)
							COOLING CAPACITIES (cont)

579F180 (15 Tons) (cont)
Temp (F)				Evaporator Air Quantity — Cfm
Temp (F)						7500
Air Entering						7500
Condenser					Evaporator Air — Ewb (F)/BF
(Edb)
(Edb)		54/0.65	58/0.52		62/0.41	67/0.30	72/0.28	76/0.27	80/0.03
		54/0.65	58/0.52		62/0.41	67/0.30	72/0.28	76/0.27	80/0.03
	TC	188	183		193	206	223	239	256
75	SHC	188	183		170	148	120	95	70
	kW	12.9	12.8		13.0	13.2	13.6	13.9	14.2
	TC	183	183		187	199	215	233	249
85	SHC	183	183		167	145	117	94	68
	kW	14.4	14.4		14.4	14.7	15.1	15.9	16.3
	TC	177	177		181	191	207	222	237
95	SHC	177	177		161	142	114	90	65
	kW	15.9	15.9		16.0	16.3	16.7	17.0	17.3
	TC	171	171		175	183	199	213	228
105	SHC	171	171		154	138	111	87	62
	kW	17.6	17.6		17.7	18.0	18.4	18.7	19.0
	TC	164	164		169	175	190	203	217
115	SHC	164	164		146	135	108	84	59
	kW	19.4	19.4		19.5	19.7	20.2	20.5	20.9
	TC	163	163		167	173	188	201	—
117	SHC	163	163		145	134	107	84	—
	kW	19.7	19.7		19.9	20.0	20.5	20.9	—
	TC	161	161		165	170	—	—	—
120	SHC	161	161		143	133	—	—	—
	kW	20.2	20.3		20.4	20.6	—	—	—

		LEGEND		3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
BF	—	Bypass Factor			Below 80 F edb, subtract (corr factor x cfm) from SHC.
BF	—	Bypass Factor			Above 80 F edb, add (corr factor x cfm) to SHC.
Edb	—	Entering Dry-Bulb			Above 80 F edb, add (corr factor x cfm) to SHC.
Edb	—	Entering Dry-Bulb
Ewb	—	Entering Wet-Bulb					ENTERING AIR DRY-BULB TEMP (F)
kW	— Compressor Motor Power Input				BYPASS		ENTERING AIR DRY-BULB TEMP (F)
ldb	—	Leaving Dry-Bulb			BYPASS	79	78	77	76	75	under 75
lwb	—	Leaving Wet-Bulb			FACTOR
					FACTOR	81	82	83	84	85	over 85
					(BF)
SHC	—	Sensible Heat Capacity (1000 Btuh) Gross			(BF)
SHC	—	Sensible Heat Capacity (1000 Btuh) Gross						Correction Factor
TC	—	Total Capacity (1000 Btuh) Gross						Correction Factor
NOTES:					0.05	1.04	2.07	3.11	4.14	5.18
NOTES:					0.10	0.98	1.96	2.94	3.92	4.91
1.	Direct interpolation is permissible. Do not extrapolate.				0.10	0.98	1.96	2.94	3.92	4.91
2.	The following formulas may be used:				0.20	0.87	1.74	2.62	3.49	4.36
	tldb =	tedb –	sensible capacity (Btuh)		0.30	0.76	1.53	2.29	3.05	3.82	Use formula
	tldb =	tedb –	1.10 x cfm		0.40	0.65	1.31	1.96	2.62	3.27	shown below.
			1.10 x cfm		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
	tlwb =	Wet-bulb temperature corresponding to enthalpy of air			0.60	0.44	0.87	1.31	1.74	2.18
	tlwb =	leaving evaporator coil (hlwb)			0.70	0.33	0.65	0.98	1.31	1.64
		leaving evaporator coil (hlwb)

	hlwb =	hewb –	total capacity (Btuh)		Interpolation is permissible.
	hlwb =	hewb –	4.5 x cfm		Interpolation is permissible.
			4.5 x cfm		Correction Factor = 1.10 x (1 – BF) x (edb – 80).
					Correction Factor = 1.10 x (1 – BF) x (edb – 80).

Where: hewb = Enthalpy of air entering evaporator coil

579F180-300

153

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Bryant 581A/B manual Performance Data 579F, Cooling Capacities

Models: 581A/B

PERFORMANCE DATA — 579F (cont)

COOLING CAPACITIES (cont)

SHC

SHC

SHC

SHC

SHC

SHC

SHC

ENTERING AIR DRY-BULB TEMP (F)

BYPASS

FACTOR

SHC

4.5 x cfm

Where: hewb = Enthalpy of air entering evaporator coil

579F180-300

581A/B specifications