Bryant manual ALTITUDE COMPENSATION* Ð 580D090-150, Evaporator-Fanmotor Efficiency

PERFORMANCE DATA (cont)

ALTITUDE COMPENSATION* Ð 580D090-150

	125,000, 180,000,		250,000 BTUH
	AND 224,000 BTUH
			NOMINAL INPUT
	NOMINAL INPUT
ELEVATION
(ft)	Natural	Liquid	Natural	Liquid
	Gas	Propane	Gas	Propane
	Ori®ce	Ori®ce	Ori®ce	Ori®ce
	Size²	Size²	Size²	Size²
0-2,000	31	41	30	38
2,000	32	42	30	39
3,000	32	42	31	40
4,000	32	42	32	41
5,000	33	43	33	42
6,000	34	43	34	43
7,000	35	44	35	43
8,000	36	44	36	44
9,000	37	45	37	44
10,000	38	46	38	45
11,000	39	47	39	45
12,000	40	47	40	46
13,000	41	48	41	47
14,000	42	48	42	47

*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes.

²Ori®ces available through your local distributor.

EVAPORATOR-FAN MOTOR EFFICIENCY

UNIT		MOTOR EFFICIENCY (%)
580D036,048		75
580D060		74
580D072		84
580D090-120		80
580D150		87
579F180 (3.7	Hp)	85.8
579F216 (5 Hp)		87.5
579F240 (7.5	Hp)	88.5
579F300 (10 Hp)		89.5

NOTE: All indoor-fan motors 5 hp and larger meet the minimum effi- ciency requirements as established by the Energy Policy Act of 1992 (EPACT) effective October 24, 1997.

ALTITUDE COMPENSATION* Ð

579F180-300

ELEVATION	NATURAL GAS ORIFICE SIZE²
(ft)	Lo Heat	High Heat
0-2,000	28	29
2,000	29	29
3,000	29	30
4,000	29	30
5,000	30	30
6,000	30	30
7,000	31	31
8,000	31	31
9,000	31	31
10,000	32	32

*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes.

²Ori®ces available through your local distributor.

ALTITUDE DERATING FACTOR* Ð

ALL UNITS

ELEVATION	MAXIMUM HEATING VALUE
(ft)	(Btu/ft3)
0-2,000	1,100
2,001-3,000	1,050
3,001-4,000	1,000
4,001-5,000	950
5,001-6,000	900

*Derating of the unit is not required unless the heating value of the gas exceeds the values listed in the table above, or if the elevation exceeds 6000 ft. Derating conditions must be 4% per thousand ft above sea level. For example, at 4000 ft, if the heating value of the gas exceeds 1000 Btu/ft3, the unit will require a 16% derating. For elevations above 6000 ft, the same formula applies. For example, at 7000 ft, the unit will require a 28% derating of the maximum heating value per the National Fuel Gas Code.

Fan Performance Using Accessory Power Exhaust (579F180-300)

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