Honeywell C7400 Manual page 13

C7660 Solid State Temperature Sensor
The C7660 Solid State Temperature Sensor is used with a
solid state economizer control and damper actuator to
proportion an outdoor air damper in a ventilation system.
CONTROL
Fig. 18. Partial psychrometric chart with single C7400A Solid State Enthalpy Sensor and W7212A or W7459 Solid State
CONTROL POINT
CURVE APPROX. °F (°C)
AT 50% RH
A 73 (23)
B 70 (21)
C 67 (19)
D 63 (17)
50
(10)
D
45
(7)
40
(4)
35
(2)
35 40 45 50
(2) (4) (7) (10)
APPROXIMATE DRY BULB TEMPERATURE— °F (°C)
1
HIGH LIMIT CURVE FOR W7210D, W7212A, W7213, W7214, W7340B.
Economizer Logic Module performance curves.
When outdoor air temperature is higher than changeover set
point, the outdoor air damper closes to the minimum position.
When the outdoor air temperature is below the changeover
set point, the outdoor air damper proportions open on a call
for cooling.
The dip switch settings for the C7660 Sensor are shown in
Fig. 21.
(29)
80
(27)
75
(24)
70
(21)
65
(18)
60
(16)
A
55
(13)
B
C
A
B
C
D
55 60 65 70 75 80
(13) (16) (18) (21) (24) (27) (29)
13
SOLID STATE ECONOMIZER SYSTEM
85 90 95 100 105 110
(32) (35) (38) (41) (43)
1
85 90 95 100 105 110
(32) (35) (38) (41) (43)
M11160D
63-2484—03