Bryant 502A manual Performance Data, Gross Cooling Capacities, Evaporator FAN Performance

PERFORMANCE DATA (cont)

GROSS COOLING CAPACITIES (cont)

502A048

Temp						Evaporator Air Quantity Cfm/BF
Air Ent				1200/0.06				1600/0.08				2000/0.10
Condenser						Evaporator Air Ewb Temp (F)
	(F)
			72	67	62	57	72	67	62	57	72	67	62	57
		TC	56.0	52.1	47.9	44.4	57.7	54.5	50.6	49.6	59.4	56.0	52.7	52.3
85		SHC	27.8	34.8	41.6	44.4	30.2	39.6	48.0	49.6	32.8	43.9	52.5	52.3
		kW	3.77	3.68	3.59	3.53	3.81	3.74	3.66	3.64	3.85	3.77	3.70	3.69
		TC	54.0	50.1	45.7	42.4	55.7	52.3	48.6	47.3	57.4	53.8	51.0	50.9
95		SHC	27.1	34.0	40.4	42.4	29.6	38.8	47.0	47.3	32.4	43.2	50.9	50.9
		kW	4.21	4.11	4.01	3.95	4.25	4.18	4.09	4.07	4.31	4.21	4.15	4.15
		TC	51.8	47.9	42.3	40.2	53.6	50.0	45.1	45.0	54.6	51.4	48.9	48.6
105		SHC	26.3	33.1	38.8	40.2	29.0	38.0	44.8	45.0	31.3	42.4	48.9	48.6
		kW	4.69	4.58	4.45	4.40	4.75	4.65	4.54	4.53	4.77	4.69	4.63	4.63
		TC	49.5	45.5	38.6	37.7	51.2	47.6	41.9	42.1	52.2	49.1	45.8	45.8
115		SHC	25.5	32.2	37.0	37.7	28.3	27.3	41.8	42.1	30.7	42.0	45.8	45.8
		kW	5.21	5.09	4.92	4.89	5.27	5.17	5.03	5.03	5.30	5.23	5.14	5.14

LEGEND

BF — Bypass Factor

Ewb — Entering Wet-Bulb

kW — Compressor Motor Power Input (kilowatts)

SHC — Gross Sensible Heat Capacity (1000 Btuh)

TC — Gross Total Cooling Capacity (1000 Btuh)

NOTES:

1.Performance based on nominal condenser airflow listed in physical data table on page 3.

2.SHC is based on 80 F db temperature of air entering the coil.

Below 80 F db, subtract (corr factor x cfm) from SHC.

Above 80 F db, add (corr factor x cfm) to SHC.

BYPASS	ENTERING AIR DRY-BULB TEMPERATURE (F)
	79	78	77	76	75	Under 75
FACTOR
	81	82	83	84	85	Over 85
(BF)
			Correction Factor
.025	1.07	2.12	3.19	4.25	5.32
.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
.35	.71	1.42	2.13	2.83	3.54

Correction Factor = 1.10 x (1 – BF) x db – 80)

502A060

Temp						Evaporator Air Quantity — Cfm/BF
Air Ent				1500/0.06				2000/0.09				2250/0.10
Condenser						Evaporator Air Ewb Temp (F)
(F)
		72			67	62	72		67	62	72		67	62
	TC	64.8			58.5	52.9	68.0		61.5	56.3	68.9		62.5	58.0
85	SHC	33.2			41.1	48.5	37.2		47.3	55.7	38.9		50.0	57.7
	kW	4.49			4.29	4.13	4.59		4.83	4.22	4.62		4.41	4.27
	TC	61.9			55.7	50.2	65.1		58.7	54.0	66.1		59.7	55.8
95	SHC	32.3			40.1	47.3	36.4		46.5	54.0	38.2		49.3	55.8
	kW	4.94			4.72	4.57	5.04		4.81	4.67	5.07		4.84	4.72
	TC	58.5			52.4	47.2	61.5		55.2	51.4	62.6		56.3	53.3
105	SHC	31.1			38.8	45.8	35.2		45.2	51.4	37.1		48.1	58.2
	kW	5.41			5.20	5.04	5.51		5.28	5.16	5.55		5.32	5.22
	TC	54.9			49.0	44.1	57.8		51.7	48.7	58.7		52.6	50.4
115	SHC	29.8			37.5	44.0	34.0		43.9	48.7	35.9		46.7	50.4
	kW	5.93			5.72	5.56	6.04		5.80	5.70	6.07		5.83	5.75
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 col (hlwb).

hlwb = hewb –	total capacity (Btuh)
	4.5 x cfm

Where:

hewb = Enthalpy of air entering evaporator coil

EVAPORATOR FAN PERFORMANCE

					UNIT SIZE — 502A
CFM		024		036			048*			060*
	ESP		Fan kW	ESP	Fan kW	ESP		Fan kW	ESP		Fan kW
600	.60		.20	—	—	—		—	—		—
700	.54		.22	—	—	—		—	—		—
800	.43		.24	—	—	—		—	—		—
900	.29		.26	.69	.44	—		—	—		—
1000	.11		.29	.57	.46	—		—	—		—
1100	—		—	.42	.49	1.10		.45	1.11		.52
1200	—		—	.23	.52	1.01		.49	1.045		.55
1300	—		—	—	—	.90		.51	.97		.57
1400	—		—	—	—	.79		.55	.88		.59
1500	—		—	—	—	.67		.58	.78		.62
1600	—		—	—	—	.54		.61	.67		.64
1700	—		—	—	—	.39		.64	.53		.67
1800	—		—	—	—	.22		.67	.52		.70
1900	—		—	—	—	.03		.70	.40		.74
2000	—		—	—	—	—		—	.28		.78

LEGEND

ESP — External Static Pressure (in. wg)

kW — Total Fan Motor Power Input (kilowatts)

*Standard direct drive indoor (evaporator) fan motor (IFM). For optional belt drive IFM performance, see table on page 8.

NOTES:

1.Above fan performance is based on wet coil and deducted casing losses, and clean factory-installed permanent cleanable filter.

2.Evaporator fans are direct drive (except 048, 060 special order evaporator-fan motor option). Refer to Belt Drive Evaporator Fan Performance table on page 8.

3.Interpolation is permissible, do not extrapolate.

4.For units installed with accessory electric heaters, see Electric Heater Static Pressure Drop table for additional performance losses.

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