Operation with Advanced Microprocessor Controls
Analog Setup
For installation of analog sensors, see 4.5.1 - Connecting the Analog Sensors.
After selecting a compatible sensor and properly wiring it to the terminals, set up the control to mon- itor the sensor as follows:
Adding an intercept of 100 to the slope example above, 1 volt would be 125: 100 + (1x[50/2]); 2 volts
would be 150: 100 + (2x[50/2]); 3 volts would be 175: 100 + (3x[50/2]); etc.
NOTE
For a
Set Status Display
The Status Display can be set to display the return air temperature and humidity SENSOR READ- INGS or the temperature and humidity control SETPOINTS through this selection. When SET- POINTS is selected, the status display indicates so by displaying “SETPTS.” If SENSOR READINGS is selected, the Status Display will show the return air sensor readings.
Calibrate Actuator
For systems that use a valve actuator for chilled water or GLYCOOL cooling, the actuator timing may be calibrated or adjusted. This is the time it takes for the valve to travel from full closed to full open. It is programmable from 0 to 255 seconds. The factory default time is 165 seconds and should not be changed unless the actual valve travel time is not correct. The full valve travel time is used by the control to determine the appropriate valve position. For example, if the valve travel time is 165 sec- onds and 50% cooling is being called for, the valve will open for 83 seconds to acheive 50% open. To change the valve travel time, first enter the “CALIBRATE ACTUATOR” screen. The display will show the present period used by the control for valve actuator full travel. Press ENTER and adjust the time using the UP/DOWN arrows. When the correct time is displayed, press ENTER to store the new time to memory.
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