Bryant 581A/B manual 580F151 121/ Tons Temp F

580F036-151

PERFORMANCE DATA (cont)

COOLING CAPACITIES (cont)

580F151 (121/ TONS)
	2
Temp (F)							Air Entering Evaporator — Cfm/BF
Air Entering				3750/0.08			4300/0.09			5000/0.11			6250/0.13
Condenser							Air Entering Evaporator — Ewb
	(Edb)
			72	67	62	72	67	62	72	67	62	72	67	62
		TC	164.6	152.0	139.9	167.3	155.3	142.6	170.9	158.2	146.2	173.9	162.0	151.0
75		SHC	81.3	101.9	121.7	84.5	108.1	130.0	88.9	115.9	139.8	96.7	128.7	150.8
		kW	10.24	9.96	9.71	10.31	10.05	9.78	10.42	10.12	9.84	10.50	10.23	9.95
		TC	159.9	147.1	133.6	162.6	150.2	137.4	166.3	153.0	141.3	169.5	156.8	147.1
85		SHC	79.7	99.9	119.1	83.1	106.3	128.0	88.3	114.1	137.7	96.1	127.4	146.9
		kW	11.38	11.05	10.82	11.45	11.14	10.87	11.58	11.20	10.97	11.66	11.32	11.08
95		TC	154.2	141.5	124.4	157.2	144.6	129.3	159.9	147.6	134.5	164.0	150.9	142.3
		SHC	77.9	98.0	114.8	81.8	104.5	124.1	86.3	112.5	133.8	94.4	125.8	142.2
		kW	12.59	12.26	11.95	12.68	12.36	12.04	12.75	12.44	12.15	12.88	12.54	12.31
		TC	147.8	134.2	114.0	150.7	137.2	119.1	153.3	140.4	136.4	156.4	143.7	136.7
105		SHC	75.4	95.2	109.5	79.6	101.9	118.2	84.4	110.6	126.5	92.2	124.0	136.6
		kW	13.84	13.48	13.12	13.92	13.58	13.24	14.01	13.69	13.37	14.06	13.80	13.58
		TC	139.7	120.4	102.8	142.1	124.2	109.1	145.5	127.5	117.1	148.4	133.2	128.1
115		SHC	72.5	89.8	102.6	76.7	97.0	109.1	82.1	105.7	116.6	90.4	120.1	128.0
		kW	15.03	14.70	14.34	15.12	14.80	15.24	15.24	14.90	14.65	15.35	15.04	14.86
		TC	130.5	107.0	92.5	132.8	109.7	135.5	135.5	112.7	105.0	138.2	121.1	118.3
125		SHC	69.8	84.4	92.4	73.7	91.5	99.2	79.0	99.9	104.9	87.7	114.6	118.3
		kW	16.32	15.91	15.67	16.43	16.00	15.79	16.52	16.11	15.97	16.59	16.21	16.10

		Standard Ratings
		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:

t	= t	edb	– sensible capacity (Btuh)
ldb			1.10 x cfm
tlwb	= Wet-bulb temperature corresponding to enthalpy of air
	leaving evaporator coil (hlwb)

h	lwb	= h	ewb	– 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
.05	1.04	2.07	3.11	4.14	5.18
.10	.98	1.96	2.94	3.92	4.90	Use formula
.20	.87	1.74	2.62	3.49	4.36	shown below.
.30	.76	1.53	2.29	3.05	3.82

Interpolation is permissible.

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

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