Bryant 580J manual Cooling Capacities, Stagecooling, Tons

Table 29 – COOLING CAPACITIES						2-STAGE COOLING									10 TONS
		580J12 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
							AIR ENTERING EVAPORATOR --- CFM
TEMP (F) AIR ENT				3000/0.04					4000/0.06				5000/0.07
CONDENSER (Edb)
								Air Entering Evaporator --- Ewb (F)
			72		67	62		72		67	62	72		67	62
		TC	142.85		129.44	116.93		152.09		138.44	125.76	157.99		144.23	132.06
75		SHC	58.38		74.88	91.58		67.96		89.45	111.02	76.63		102.94	127.93
		kW	7.19		6.97	6.79		6.92		7.12	7.35	7.45		7.22	7.02
		TC	132.33		119.68	107.86		140.92		128.03	116.10	146.41		133.41	121.98
85
		SHC	48.44		65.56	82.83		57.37		79.50	101.68	65.65		92.58	118.12
		kW	7.98		7.77	7.58		7.72		7.92	8.14	8.25		8.01	7.82
		TC	121.41		109.52	98.43		129.35		117.22	106.04	134.43		122.20	111.50
95
		SHC	38.19		55.92	73.78		46.47		69.22	92.01	54.34		81.92	107.96
		kW	8.87		8.66	8.48		8.61		8.80	9.03	9.14		8.90	8.71
		TC	110.04		98.92	88.56		117.27		105.94	95.53	121.88		110.46	100.54
105
		SHC	27.59		45.94	64.39		35.16		58.57	81.98	42.56		70.82	97.40
		kW	9.86		9.66	9.48		9.61		9.79	10.02	10.12		9.89	9.70
		TC	98.09		87.74	78.13		104.62		94.08	84.45	108.76		98.13	89.01
115		SHC	16.52		35.47	54.53		23.37		47.44	71.46	30.32		59.25	86.31
		kW	10.95		10.76	10.60		10.72		10.89	11.10	11.19		10.98	10.81
	580J12 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
			3000	4000		5000	3000		4000		5000	3000	4000		5000
		TC	44.78	39.41		31.89	53.22		49.44		43.38	60.56	58.12		53.32
80
		SHC	--- 0.44	--- 0.57		--- 0.69	--- 0.37		--- 0.51		--- 0.61	--- 0.33	--- 0.46		--- 0.56
		kW	6.96	6.77		6.52	7.26		7.13		6.91	7.54	7.45		7.27
		TC	45.84	40.46		32.86	54.28		50.51		44.45	61.61	59.19		54.40
75
		SHC	0.53	0.40		0.29	0.60		0.47		0.37	0.64	0.52		0.42
		kW	6.77	6.56		6.29	7.11		6.95		6.72	7.41	7.31		7.12
		TC	46.91	41.48		33.50	55.36		51.59		45.50	62.69	60.28		55.49
70		SHC	1.51	1.38		1.27	1.57		1.45		1.35	1.61	1.50		1.40
		kW	6.54	6.32		6.02	6.90		6.74		6.49	7.23	7.13		6.92
		TC	48.88	43.42		35.76	57.29		53.56		47.48	64.56	62.16		57.42
60		SHC	3.44	3.34		3.24	3.51		3.40		3.31	3.55	3.45		3.37
		kW	6.45	6.16		6.70	6.93		6.72		6.39	7.38	7.24		6.96
		TC	50.83	45.28		37.67	59.22		55.52		49.43	66.05	64.03		59.34
50
		SHC	5.38	5.29		5.20	5.45		5.36		5.28	5.48	5.40		5.33
		kW	6.46	6.01		6.34	6.98		6.71		6.29	8.15	7.38		7.02
		TC	52.82	47.29		39.50	61.14		57.48		51.39	68.23	65.88		61.25
40
		SHC	7.32	7.24		7.20	7.38		7.31		7.24	7.43	7.36		7.29
		kW	6.29	6.09		6.12	7.05		6.72		6.29	7.78	7.55		7.10

NOTE: Perfect Humidity only available on 2---stage RTPF models.

LEGEND			NOTES:
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

49