Sequence of Operation
Manual
This option uses a manually adjustable outdoor air damper that can set in a fixed 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 fixed 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
The damper will open to the programmed “ECONOMIZER MINIMUM POSITION” whenever the following conditions are met:
•The unit is in the occupied mode.
•There must be a
•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”.
FORM
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 within +/- 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
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.
90 | JOHNSON CONTROLS |
