Honeywell W7750A specifications T7242 or equivalent, 74-2958 114, MAmAmAmA AmA mA mA

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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

CONTROL

CURVE

A

B

C

D

18 16 14 12

CONTROL POINT
APPROX. ° F (° C)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)						DRY
					POUND
						34
				PER
					32
		BTU
	—			30
		28
26
ENTHALPY
24
22
20
						55
					(13)
					50
				(10) C
			45 D
		(7)
40

AIR	40
	38
36

65

(18)

60

(16)

A

B

44 42

70

(21)

100 90

46

80 (27)

75

(24)

80 70

60

50

40

RELATIVE

30

HUMIDITY

20

(%)

(4)

35

(2)

10

D C B A 1

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)

APPROXIMATE DRY BULB TEMPERATURE—°F (° C)

M11160

1 HIGH LIMIT CURVE FOR W6210D,W7210D.

Fig. 60. Partial psychometric chart for a C7400A Solid State Enthalpy Sensor.

See Fig. 61 for a C7400A Solid State Enthalpy Sensor output current vs. relative humidity.

	100	C7400A OUTPUT CURRENT
	90
	80
RH	70
PERCENT	60		20	18	16	14	12	10	8	6	4
							m				m
	50		mAmAmAmA AmA mA mA								A
	40											D = 17 MA
												C = 15.5 MA
	30											B = 13.5 MA
												A = 11 MA
	20
	10				D C		B	A
	40	50		60					80		90	100
							70
	(4)	(10)	(16)			(21)			(27)		(32)	(38)
					TEMPERATURE ° F (° C)							M11605

Fig. 61. C7400A Solid State Enthalpy Sensor output

current vs. relative humidity.

Sensor Type: T7242 or equivalent

74-2958— 1 114