Optional Bas-Ready Economizer Power Exhaust Damper Set Point Adjustment; Optional Variable Air Volume (Vav) - York ZF210 Instruction Manual

Table 14: Simplicity SE Economizer Board Details (Continued)
Cover Label
C
COM
R
24V~
BLDG
IN8
PRES
C
COM
PURGE
IN9
24V~
EX VFD
FLT
IN10
24V~
Power Exhaust Damper Set Point
With power exhaust option, each building pressurization
requirement will be different. The point at which the power
exhaust comes on is determined by the economizer damper
position (Percent Open). The Exhaust Air Adjustment Screw
should be set at the Percent Open of the economizer damper at
which the power exhaust is needed. It can be set from 0 to
100% damper open.
Indoor Air Quality AQ
Indoor Air Quality (indoor sensor input): Terminal AQ accepts a
+2 to +10 Vdc signal with respect to the (AQ1) terminal. When
the signal is below it's set point, the actuator is allowed to
modulate normally in accordance with the enthalpy and mixed
air sensor inputs. When the AQ signal exceeds it's set point
setting and there is no call for free cooling, the actuator is
proportionately modulated from the 2 to 10 Vdc signal, with 2
Vdc 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 it's set point (Demand Control
Ventilation Set Point) 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 AQ voltage input.
• Optional CO Space Sensor Kit Part # 2AQ04700324
2
• Optional CO Sensor Kit Part # 2AQ04700424
2
Johnson Controls Unitary Products
Description
24 VAC common/0-10 VDC negative for the air
monitoring station sensor
24 VAC hot supplied for the building pressure
sensor
0-5 VDC positive input from the Building
Pressure sensor
24 VAC common/0-5 VDC negative for the
building
pressure sensor
BINARY INPUTS at right on lower edge of economizer board
24 VAC hot input from the PURGE dry contact
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 & Comments
Connects through circuit trace to 24V~ IN pin COM
Connects through circuit trace to 24V~ IN pin HOT
BldgPres parameter reports input status (-.250-.250"/w/-.062-
.062kPa). Used for modulating power exhaust functions when
ExFType selection is Modulating Damper or Variable Frequency
Fan.
Connects through circuit trace to 24V~ IN pin COM
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
Replace the top rear access panel on the unit.
Optional BAS-Ready Economizer Power Exhaust
Damper Set Point Adjustment
Remove the economizer access panel from the unit. Loosen,
but do not remove the two panel latches. Locate the
economizer actuator, where the following adjustment can be
made.
With power exhaust option, each building pressurization
requirement will be different. The point at which the power
exhaust comes on is determined by the economizer's outdoor
damper position. The actuator's auxiliary switch adjustment
screw should be set at the damper position at which the power
exhaust is needed. The adjustment screw can be set between
25 to 85 degrees open.
Replace the economizer access panel.

Optional Variable Air Volume (VAV)

A variable air volume (VAV) option using a variable frequency
drive (VFD) is available for applications requiring a constant
supply duct static pressure. A differential pressure transducer is
used to monitor supply duct static pressure and return a speed
reference signal to the VFD to control the output of the indoor
blower motor.
1088917-YIM-B-1014
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