Trane ReliaTel - Electromechanical Economizer Functions

RT-SVD03G-EN 11 3
Electromechanical Economizer Functions
Figure 65. Economizer Actuator (ECA) connected to the unit
Figure 66. Economizer Actuator (ECA) connected to the unit
G 24VAC
Outdoor Thermostat
B 24VAC Common
Y1 1st stage cool
Y2 2nd stage cool
Mixed Air Sensor
TR TR1
SO
SR
+
+
5
2
4
1
3
T
T1
P P1
Minimum
Position
Open CW
Close CCW
A
B
C
D
CC1
CC2
RED
BLUE
WHITE
Outdoor Enthalpy Control
Return Enthalpy Control
Mixed Air Sensor
Remote Minimum
Position Potentiometer
Y1 1st stage cool
Y2 2nd stage cool
CC1
CC2
TR
TR1
SO
SR
A
B
C
D
Minimum
Position
Open CW
Close CCW