York ZV-06 Installation Manual page 47

Smart Equipment™ economizer board - binary outputs
Board Cover
Location
label label
24V~
ACT-A
ACT-B
COM
E J3
EX-FAN
COM
Smart Equipment™ economizer board - 24V
Board Cover
Location
label label
C
COM
F
R
HOT
Smart Equipment™ economizer board - binary inputs
Board Cover
Location
label label
PURGE 24 VAC hot input from the PURGE dry contact
IN9
24V~
G
EX VFD
FLT
IN10
24V~
Indoor air quality
Indoor air quality (IAQ) is regulated by an indoor sensor input.
The IAQ sensor is connected to the economizer board through
the IAQ analog input terminal and the associated COM and
24V~ inputs on the economizer board. Terminal IAQ accepts a
0 to +10 VDC signal with respect to the IAQ terminal. When the
signal is below its setpoint, the actuator is allowed to modulate
normally in accordance with the enthalpy and mixed air sensor
inputs. When the IAQ signal exceeds its setpoint setting and
there is no call for free cooling, the actuator is proportionately
modulated from the 0 to 10 VDC signal, with 0 VDC
Johnson Controls Ducted Systems
Description
24 VAC hot supplied for an incremental
(floating control) economizer actuator
24 VAC hot outputs to position an incremental
(floating control) economizer actuator
24 VAC return
24 VAC common for an incremental (floating
control) economizer actuator
24 VAC hot output to energize power exhaust
fan contactor coil/VFD enable relay coil
24 VAC common/0-10 VDC negative for
economizer actuator
IN connections
~
Description
24 VAC transformer Common referenced to
cabinet ground
24 VAC transformer HOT
Description
24 VAC hot supplied for the purge dry contact
24 VAC hot input from the power Exhaust
Variable Frequency Drive Fault contact
24 VAC hot supplied for the power exhaust
variable frequency drive fault contact
Function and comments
Connects through circuit trace to 24V~ IN pin HOT
Unused in current control revision
Unused in current control revision
Connects through circuit trace to 24V~ IN pin COM
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.
Connects through circuit trace to 24V~ IN pin COM
Function and comments
24 VAC common connection to power the economizer board.
Connects through circuit traces to C/COM terminals and pins
distributed on the economizer board.
24 VAC hot connection to power the economizer board.
Connects through circuit traces to R/24V~ terminals and pins
distributed on the economizer board.
Function and comments
Purge parameter reports input status (False with 0 VAC input-
True with 24 VAC input). When Purge status is True, heating and
cooling operation is prevented, the indoor blower and power
exhaust fan operate, the economizer actuator is positioned to
100%.
Connects through circuit trace to 24V~ IN pin HOT
ExFanVFDFlt parameter reports input status (Normal with 0 VAC
input-Alarm with 24 VAC input) when ExFType selection is
Variable Frequency Fan. When ExFanVFDFlt status is Alarm,
EX-FAN fan output is prevented.
Connects through circuit trace to 24V~ IN pin HOT
corresponding to full closed and 10 VDC corresponding to full
open. When there is no call for free cooling, the damper
position is limited by the IAQ max. damper position setting.
When the signal exceeds its setpoint (demand control
ventilation setpoint) setting and there is a call for free cooling,
the actuator modulates from the minimum position to the full
open position based on the highest call from either the mixed
air sensor input or the IAQ voltage input.
2
• Optional CO space sensor kit - part no. 2AQ04700524
2
• Optional CO sensor kit - part no. 2AQ04700624
5567611-BIM-B-1218
47