
91
JOHNSON CONTROLS
FORM 145.05-NOM2 (807)
MENU ITEM
DEFINITION
# DUCT SENSORS - 1 OR 2 Identifi es the number of duct static inputs the Unit Control is programmed for.
AC - S/A DEW EN
This enables dew point supply air temperature cooling control (FlexSys units
only).
AC DX TEMP
This is the coil temperature cooling PID loop generated by comparing the DX
coil temperature to 40.0° F. This is a reverse acting PID loop, as the temperature
approaches 40.0° F the output increases. (FlexSys units only).
AC R/A TEMP
This is the return air cooling PID loop generated by comparing the return air
temperature to the AC/Econ-R/A SP.
AC S/A DEW
This is the DEW POINT COOLING PID loop generated by comparing the dew
point temperature of the supply air to a derived dew point temperature set point
(FlexSys units only).
AC S/A TEMP
This is the supply air cooling PID loop generated by comparing the supply air
temperature to the AC/Econ-S/A SP.
AC/ECON-RA SP
This item is used to program the return air temperature set point for cooling or
economizer operation.
AC/ECON-S/A SP
This item is used to program the supply air temperature set point for cooling or
economizer operation.
AC-R/A TEMP EN
This item is used to enable and disable cooling Return Air Temperature Control.
AC-S/A DEW DIF
This item is used to program the offset from the Slab Temperature that the con-
trol will use in deriving the DEW POINT COOLING PID loop (FlexSys units
only).
AC-S/A DEW MAX
This item is used to program the maximum value for the derived cooling dew
point set point (FlexSys units only).
AC-S/A DEW MIN
This item is used to program the minimum value for the derived cooling dew
point set point (FlexSys units only).
AC-S/A TEMP EN
This item is used to enable and disable cooling Supply Air Temperature Control.
AIR FLOW SWITCH
This gives the status of the air proving switch in the unit. It should show ON
when the blower is operating and OFF when the blower is turned off.
ALARM OUT
This is the status of the digital fault alarm output.
ALARM OUTPUT
This Item is used to force the normally OPEN contacts that signify a fault to
CLOSE.
AUX DAMPER
This is not used in this product.
AUX FAN OUT
This item is used to force the normally OPEN contacts that signifi es the supply
fan is on to CLOSE.
B/P DAMPER MOD
This is the analog output to the by-pass damper (FlexSys units only).
BOX OPEN
This item is used to force the normally OPEN contacts used to open the VAV
boxes to CLOSE.
BYPASS DAMP
This item is used to force an analog output to the bypass damper (FlexSys units
only).
CALC DUCT STATIC
When multiple duct static transducers are used this is the derived duct static
input used by the Unit Controller for the control of the supply fan VFD.
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Continued on next page
SECTION 7 – PARAMETER DESCRIPTIONS AND OPTIONS
TABLE 16 – DEFINITIONS
Summary of Contents for YSCD
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