York ECO2 YPAL 050, Installation & Operation Manual

Page: 90 / 168

90 JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
Sequence of Operation
Manual
This option uses a manually adjustable outdoor air
damper that can set in a fi xed position to control the
amount of outdoor air that is brought into the building
for ventilation. As long as the supply fan is operative,
ventilation air will be brought into the building. To
adjust the damper:
•
Loosen the wing nut that holds the adjustment
handle in a fi xed position.
•
Move the handle to the desired position.
•
Tighten the wing nut to hold the handle in the
desired position.
Fixed Minimum
The following parameters must be programmed to
enable Fixed Minimum Ventilation:
“ECONOMIZER INSTALLED” – must be enabled
using Parameter 32 under the PROGRAM key
on the Simplicity Elite control board or under the
ECONOMIZER/EXHAUST tab in the Simplicity PC
software package.
“ ECONOMIZER MINIMUM POSITION” – must be
programmed using Parameter 35 under the PROGRAM
key on the Simplicity Elite control board or under the
ECONOMIZER/EXHAUST tab in the Simplicity PC
software package.
Sequence of Operation
T h e d a m p e r w i l l o p e n t o t h e p r o g r a m m e d
“ECONOMIZER MINIMUM POSITION” whenever
the following conditions are met:
•
The unit is in the occupied mode.
•
There must be a 24-volt output from the Simplic-
ity Elite control to the supply fan control circuit.
The output is contained at the “FAN” terminal
of connector P13 on the Simplicity Elite control
board.
•
When the economizer becomes active the position
of the dampers are controlled by the Economizer
PI logic which could move the dampers beyond
the
“ECONOMIZER MINIMUM POSITION” ;
however, the Economizer PI logic can never
close the dampers less then the “
ECONOMIZER
MINIMUM POSITION”.
Demand Ventilation
In this mode the Simplicity Elite control monitors the
CO2 level in the conditioned space. The Simplicity
Elite control modulates the outdoor air damper beyond
the
“ECONOMIZER MINIMUM POSITION” in order
to keep the CO2 level /- 100 PPM of the
“IAQ
SETPOINT”.
In order to use this feature a CO2 sensor must be installed
in the conditioned space and connected to
“DV+” and
the
“DV-“
terminals of the P20 connector.
The following parameters must be programmed to
enable Demand Ventilation:
“ECONOMIZER INSTALLED”
– must be enabled
using Parameter 32 under the PROGRAM key
on the Simplicity Elite control board or under the
ECONOMIZER/EXHAUST tab in the Simplicity PC
software package.
“ECONOMIZER MINIMUM POSITION” – must be
programmed using Parameter 35 under the PROGRAM
key on the Simplicity Elite control board or under the
ECONOMIZER/EXHAUST tab in the Simplicity PC
software package.
“DEMAND VENTILATION (IAQ) ENABLED” – must
be enabled using Parameter 40 under the PROGRAM
key of the Simplicity Elite control board or under the
COMFORT / DEMAND VENTILATION tab in the
Simplicity PC software package.
“IAQ SENSOR RANGE” - must be programmed
using Parameter 41 under the PROGRAM key on the
Simplicity Elite control board or under the COMFORT
/ DEMAND VENTILATION tab in the Simplicity PC
software package.
“IAQ SETPOINT” - must be programmed using
Parameter 42 under the PROGRAM key on the
Simplicity Elite control board or under the COMFORT
/ DEMAND VENTILATION tab in the Simplicity PC
software package.
“MAXIMUM IAQ ECONOMIZER POSITION”
– must
be programmed under the COMFORT / DEMAND
VENTILATION tab in the Simplicity PC software
package.