York ZT SERIES - Smart Equipment Economizer Board; SE-ECO1001-0 Economizer Controller

6021980-UIM-A-1120
44 Johnson Controls Ducted Systems
Smart Equipment™ economizer board
Figure 25: SE-ECO1001-0 economizer controller
The following tables describe the details of the economizer board. See Figure 25 for connection locations.
A
B
C D E
F
GH
Smart Equipment™ economizer board - analog inputs
Location
Board
label
Cover
label
Description Function and comments
A
C
COM
24 VAC common/0-10 VDC negative for
economizer actuator position feedback
Connects through circuit trace to 24V~ IN pin COM
IN2
ECOFB
0-10 VDC positive input from economizer
actuator position feedback
The EconDampPos parameter reports input status (0-100%).
Used to meet California Title 24 requirements for economizer
actuator position feedback.
R
24V~
24 VAC hot supplied for economizer actuator
position feedback
Connects through circuit trace to 24V~ IN pin HOT
C
COM
Mixed air temperature sensor input from 10KΩ
@ 77°F, Type III negative temperature
coefficient thermistor
The MAT parameter reports input status (°F/°C), 3.65 VDC
reading MAT (+) to COM (−) with open circuit. Read-only use in
current control revision.
IN1
MAT
H
R
24V~
24 VAC hot supplied for the outdoor air
humidity sensor
Connects through circuit trace to 24V~ IN pin HOT
IN3
OAH
0-10 VDC positive input from the Outdoor Air
Humidity sensor
OAH parameter reports input status (0-100%H). Used in outdoor
air enthalpy calculation for dual enthalpy economizer free cooling
changeover.
C
COM
24 VAC common/0-10 VDC negative for the
outdoor air humidity sensor
Connects through circuit trace to 24V~ IN pin COM
R
24V~
24 VAC hot supplied for the supply air humidity
sensor
Connects through circuit trace to 24V~ IN pin HOT
IN4
SAH
0-10 VDC positive input from the Supply Air
Humidity sensor
SAH parameter reports input status (0-100%H). Unused in
current control revision.