Table 75: Smart Equipment
™
Economizer Board Details
Board Label Cover Label Description Function and Comments
ANALOG OUTPUTS Pin at center on upper edge of economizer board
EX VFD
2-10 VDC positive output for the modulating power
Exhaust fan Variable Frequency Drive/discharge damper
modulating power exhaust actuator
ExFanVFD parameter reports output status (0-100%) when ExFType selection is
Variable Frequency Fan; EAD-O parameter reports output status (0-100%) when
ExFType selection is Modulating Damper. Used to ramp the power exhaust fan
VFD/position the discharge damper actuator.
COM
24 VAC common/0-10 VDC negative for the power exhaust
variable frequency drive/discharge damper modulating
power exhaust actuator
Connects through circuit trace to 24V~ IN pin COM
24V~
24 VAC hot supplied for the discharge damper modulating
power exhaust actuator and economizer actuator
Connects through circuit trace to 24V~ IN pin HOT
ECON 2-10 VDC output for the Economizer actuator
Econ parameter reports output status (0-100%). Used to position the
economizer actuator for minimum position, free cooling, demand ventilation,
cooling economizer loading and purge functions
J4
COM
24 VAC common/0-10 VDC negative for economizer
actuator
Connects through circuit trace to 24V~ IN pin COM
BINARY OUTPUTS Pin at right on upper edge of economizer board
24V~
24 VAC hot supplied for an incremental (floating control)
economizer actuator
Connects through circuit trace to 24V~ IN pin HOT
ACT-A
24 VAC hot outputs to position an incremental (floating
control) economizer actuator
Unused in current control revision
ACT-B 24 VAC return Unused in current control revision
COM
24 VAC common for an incremental (floating control)
economizer actuator
Connects through circuit trace to 24V~ IN pin COM
EX-FAN
24 VAC hot output to energize power exhaust fan
contactor coil/VFD enable relay coil
ExFan parameter reports output status (Off-On) when ExFType selection is Non-
Modulating, Modulating Damper or Variable Frequency Fan. Used to turn on/
enable the power exhaust fan motor.
J3
COM
24 VAC common/0-10 VDC negative for economizer
actuator
Connects through circuit trace to 24V~ IN pin COM
24V~ IN Pin connections at right on upper edge of economizer board
C COM
24 VAC transformer Common referenced to cabinet
ground
24 VAC common connection to power the economizer board. Connects through
circuit traces to C/COM terminals and pins distributed on the economizer board.
R HOT 24 VAC transformer HOT
24 VAC hot connection to power the economizer board. Connects through circuit
traces to R/24V~ terminals and pins distributed on the economizer board.
ANALOG INPUTS Terminal on lower edge of economizer board
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.
C COM
24 VAC common/0-10 VDC negative for the supply air
humidity sensor
Connects through circuit trace to 24V~ IN pin COM
R 24V~ 24 VAC hot supplied for the indoor air quality sensor Connects through circuit trace to 24V~ IN pin HOT
IN5 IAQ 0-10 VDC positive input from the Indoor Air Quality sensor
IAQRange parameter sets the CO2 parts per million measured by the indoor
air quality sensor when it outputs 10 VDC; IAQ parameter reports input status
(0-5000ppm). Used for demand ventilation functions if the NetIAQ parameter
indicates ?Unrel.
C COM
24 VAC common/0-10 VDC negative for the indoor air
quality sensor
Connects through circuit trace to 24V~ IN pin COM
R 24V~ 24 VAC hot supplied for the outdoor air quality sensor Connects through circuit trace to 24V~ IN pin HOT
IN6 OAQ
0-10 VDC positive input from the Outdoor Air Quality
sensor
OAQRange parameter sets the CO2 parts per million measured by the outdoor
air quality sensor when it outputs 10 VDC; OAQ parameter reports input status
(0-5000ppm). Used for demand ventilation function when DVent-Mode selection
is Diff between IAQ and OAQ and the NetOAQ parameter indicates ?Unrel.
C COM
24 VAC common/0-10 VDC negative for the outdoor air
quality sensor
Connects through circuit trace to 24V~ IN pin COM
R 24V~ 24 VAC hot supplied for the air monitoring station sensor Connects through circuit trace to 24V~ IN pin HOT
IN7 FR AIR
0-10 VDC positive input from the air monitoring station
sensor
MOA-Range parameter sets the cubic feet per minute/liters per second
measured by the air monitoring station sensor when it outputs 10 VDC; Fr Air
parameter reports input status (0-50000CFM/23595lps). Used for economizer
minimum position reset in speed-controlled indoor blower applications.
C COM
24 VAC common/0-10 VDC negative for the air monitoring
station sensor
Connects through circuit trace to 24V~ IN pin COM
R 24V~ 24 VAC hot supplied for the building pressure sensor Connects through circuit trace to 24V~ IN pin HOT
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A116
Johnson Controls Ducted Systems
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