Trane ReliaTel - Page 15

RT-SVD03G-EN 15
Module Flow Diagram
Figure 5. Honeywell Economizer Module (ECA)
Refrigeration
Module
24 VAC
Honeywell Economizer Module
Power Exhaust
ModBus Communication
24 VAC
PWR
EXH
relay
D
B
A
C
Enthalpy/Temperature
Setpoint Pot.
0-50% Minimum
Position Pot.
C0
2
Setpoint Adjustment
(500-1500 ppm)
Mixed Air Temp (AIP)
10K 25C Neg Coeff
Return Air Relative Humidity (AIP)
4-20 mA Pos Coeff
Return Air Temp (AIP)
10K 25C Neg Coeff
Outdoor Air Relative Humidity (AIP)
4-20 mA Pos Coeff
IAQ Sensor (C0
2
) (AIP)
0-10 VDC
Remote Minimum Position Pot. (AIP)
0-270 Ohm
MA Sensor
RH Sensor
RA Sensor
RH Sensor
Potentiometer
C0
2
Sensor
Status LED
E
ECA