Bryant 580J manual Cooling Capacities, Stagecooling, Tons

Table 23 – COOLING CAPACITIES						2-STAGE COOLING									7.5 TONS
		580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
							AIR ENTERING EVAPORATOR --- CFM
TEMP (F) AIR ENT				2250/0.05					3000/0.07				3750/0.09
CONDENSER (Edb)
								Air Entering Evaporator --- Ewb (F)
			72		67	62		72		67	62	72		67	62
		TC	103.05		93.02	83.60		109.77		99.52	90.08	114.01		103.69	95.19
75		SHC	43.66		55.34	67.09		50.99		66.29	81.31	57.49		76.27	92.20
		kW	4.90		4.83	4.77		4.82		4.88	4.96	4.99		4.91	4.85
		TC	95.39		85.83	76.88		101.59		91.89	82.95	105.53		95.76	87.77
85
		SHC	36.42		48.47	60.60		43.24		58.99	74.40	49.44		68.68	84.90
		kW	5.49		5.42	5.36		5.40		5.47	5.54	5.58		5.50	5.44
		TC	87.48		78.44	69.97		93.21		84.05	75.61	96.84		87.63	80.14
95
		SHC	28.98		41.46	53.97		35.32		51.53	67.34	41.21		60.92	77.41
		kW	6.16		6.09	6.03		6.08		6.14	6.21	6.24		6.17	6.11
		TC	79.35		70.83	62.84		84.57		75.96	68.04	87.88		79.23	72.26
105
		SHC	21.34		34.26	47.18		27.17		43.86	60.08	32.73		52.95	69.70
		kW	6.93		6.86	6.81		6.85		6.91	6.97	7.00		6.93	6.88
		TC	70.87		62.89	55.42		75.58		67.54	60.15	78.56		70.51	64.06
115		SHC	13.40		26.79	40.14		18.70		35.89	52.54	23.94		44.68	61.67
		kW	7.79		7.74	7.69		7.73		7.78	7.83	7.86		7.80	7.76
	580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN HOT GAS REHEAT MODE
							AIR ENTERING EVAPORATOR --- Ewb (F)
					75 Dry Bulb					75 Dry Bulb				75 Dry Bulb
TEMP (F) AIR ENT				62.5 Wet Bulb					64 Wet Bulb				65.3 Wet Bulb
CONDENSER (Edb)				(50% Relative)					(56% Relative)				(60% Relative)
								Air Entering Evaporator --- Cfm
			2250	3000		3750	2250		3000		3750	2250	3000		3750
		TC	27.60	32.75		30.19	40.09		39.43		37.73	45.06	45.25		44.25
80
		SHC	--- 3.12	5.20		6.71	3.75		5.24		6.75	3.77	5.26		6.78
		kW	4.56	4.51		4.46	4.63		4.60		4.56	4.70	4.67		4.64
		TC	35.40	33.78		31.20	41.14		40.51		38.80	46.15	46.37		45.38
75
		SHC	4.67	6.17		7.69	4.71		6.21		7.73	4.74	6.24		7.76
		kW	4.41	4.36		4.39	4.41		4.36		4.36	4.41	4.39		4.36
		TC	36.36	34.71		32.18	42.10		41.47		39.77	47.08	47.31		46.32
70		SHC	5.63	7.14		8.66	5.67		7.18		8.71	5.70	7.21		8.74
		kW	4.43	4.49		4.41	4.44		4.40		4.39	4.49	4.47		4.44
		TC	38.25	36.64		34.15	43.97		43.37		41.72	48.98	49.22		48.26
60		SHC	7.56	9.09		10.62	7.60		9.13		10.66	7.62	9.15		10.69
		kW	4.56	4.55		4.43	4.57		4.53		4.46	4.56	4.55		4.50
		TC	40.15	38.60		36.14	45.95		45.37		43.73	50.57	50.97		49.56
50
		SHC	9.48	11.03		12.58	9.52		11.07		12.62	9.54	11.10		12.64
		kW	4.63	4.52		4.38	4.45		4.41		4.33	5.25	4.91		5.60
		TC	42.18	40.62		38.11	47.80		47.25		45.43	52.65	52.75		51.83
40
		SHC	11.41	12.98		14.54	11.45		13.02		14.58	11.47	13.04		14.60
		kW	4.32	4.37		4.37	4.65		4.60		4.89	4.96	5.20		5.12

NOTE: Perfect Humidity only available on 2--- stage RTPF models.			NOTES:
LEGEND
Edb	---	Entering Dry--- Bulb	1. Direct interpolation is permissible. Do not extrapolate.
Ewb	---	Entering Wet--- Bulb	2. The following formulas may be used:
kW	---	Compressor Motor Power Input		sensible capacity (Btuh)
Idb	---	Leaving Dry--- Bulb	tldb = tedb –
				1.10 x cfm
Iwb	---	Leaving Wet--- Bulb	tlwb = Wet--- bulb temperature corresponding to enthalpy of air
SHC ---		Sensible Heat Capacity (1000 Btuh) Gross
			leaving evaporator coil (hlwb)
TC	---	Total Capacity (1000 Btuh) Gross		total capacity (Btuh)
			hlwb = hewb –
				4.5 x cfm

Where: hewb = Enthalpy of air entering evaporator coil

580J

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