Bryant 581A/B Economizer Changeover Curves, ECONOMI$ER IV Sensor Usage Chart, Enthalpy Sensor

APPLICATION DATA (cont)

85	90	95	100	105	110
(29)	(32)	(35)	(38)	(41)	(43)

CONTROL

CURVE

A

B

C

D

1 8

1 6

1 4

1 2

CONTROL POINT

APPROX. °F (°C)

AT 50% RH

73(23)

70(21)

67(19)

63(17)

												PO	U	N
											R
									P	E		32
								TU
						—	B			30
				LP	Y		28
			HA
		NT		26
	E		4
		2
2	2

2 0

50

(10)

45 D

(7)

40

(4)

35

(2)

						IR		40
			Y	A			3	8
		DR
D				3	6
	3	4

65

(18)

60

(16)

A

55

(13)B

C

4 4

42

70

(21)

1	0	0		0
			9

46

80

(27)

75

(24)

80 70

6 0

50

D C B A

4 0

	A	T	IVE
REL

3 0

					%	)
			Y	(
		IDIT
HU	M

20

0 1

HIGH LIMIT

CURVE

35	40	45	50	55	60	65	70	75	80	85	90	95	100	105	110
(2)	(4)	(7)	(10)	(13)	(16)	(18)	(21)	(24)	(27)	(29)	(32)	(35)	(38)	(41)	(43)

a50-7751

APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

Economizer Changeover Curves

ECONOMI$ER IV SENSOR USAGE CHART

	ECONOMI$ERIV WITH OUTDOOR AIR	ECONOMI$ERIV WITH SINGLE
APPLICATION	DRY BULB SENSOR	ENTHALPY SENSOR
	Accessories Required	Accessories Required
Outdoor Air Dry Bulb	None. The outdoor air dry bulb sensor is factory installed.	CRTEMPSN002A00*
Differential Dry Bulb	CRTEMPSN002A00*	(2) CRTEMPSN002A00*
Single Enthalpy	HH57AC078	None. The single enthalpy sensor is factory installed.
Differential Enthalpy	HH57AC078
	and	CRENTDIF004A00*
	CRENTDIF004A00*
CO2 for DCV Control using a	CGCDXSEN004A00
Wall-Mounted CO2 Sensor
CO2 for DCV Control using a	CGCDXSEN004A00†
	and
Duct-Mounted CO2 Sensor	CGCDXASP001A00**

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed for installation.

†CGCDXSEN004A00 is an accessory CO2 sensor.

**CGCDXASP001A00 is an accessory aspirator box required for duct-mounted applications.

266