Greenheck BAPI Zone Pressure Touch (ZPT) Sensor - Manual (Page 3)

32215_ins_ZPT_SR_NT.pdf
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
Zone Pressure Touch (ZPT) Sensor - Standard Range
Installation and Operation Instructions
rev. 05/09/2014
Specifications subject to change without notice.
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Normal Operation
Parameter Setup
ENTERING AND EXITING PARAMETER SETUP MODE
To perform parameter setup (see setup flow chart, Fig 5, on the last page of this document):
• Open the enclosure cover and press the Setup Start Button on the lower right of the circuit board. (See Fig. 4)
• Close the cover, being careful not to touch the buttons or the BAPI logo.
• Press the right or left arrow buttons to select the entry icon of the parameter needing editing.
• Press the Enter button to select the parameter
• Edit the parameter according to the detailed instructions for each parameter below.
• Be sure that you are at the entry icon for each parameter edited to save the edit.
• To resume normal operation, press the BAPI logo.
Note: You may edit more than one parameter per session. All edits will hold through power downs.
AUTO-ZERO
Perform auto-zero after the unit is mounted and powered.
To auto-zero the BAPI ZPT, remove the tubing from the pressure ports (removing the normal pressure source).
Make sure that the pressure ports are sheltered from drafts, including the technician’s breath. Ideally the two ports
should be connected together with a short piece of tubing, making sure that there are no kinks in the tubing.
Entry Icon for Auto-Zero
• Enter the Auto-Zero Mode as described above in the “Entering and Exiting Parameter Setup Mode”.
• When the unit is in Auto-Zero Mode, press and release the Enter button. The display will show “OFF.”
• Press and release the Right or Left Arrow button until “On” is displayed.
• Press and release the Enter button. The display will show four dashes, “- - - -.”
• When the display shows “AutO,” auto-zero is complete and stored.
• Either resume normal operation or edit another parameter.
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During normal operation, the LCD shows the differential pressure between the high and low pressure ports of the
transmitter. The LCD allows enhanced troubleshooting by showing the actual differential pressure over the entire
operational pressure range of the sensor regardless of which pressure range is selected. For instance, if the 2.50
inch Water Column range is selected and 3.75 inches Water Column is present, the electrical output of the sensor
maxes out. The facility maintenance personnel looking at the sensor output can only tell that the pressure is greater
than 2.50 inches Water Column. With the display showing the actual pressure, it is easier for the maintenance
personnel to determine what is causing the error.
Additional Features:
• Pressing the left arrow button displays the low end pressure of the currently selected pressure range for 5
seconds.
• Pressing the enter button shows the electrical output in percent span for 5 seconds.
• Pressing the right arrow button displays the high end pressure of the currently selected pressure range for 5
seconds.
Note: If the display is set to OFF (see Parameter Setup below), pressing the enter button shows the current
pressure and a second press displays the electrical output in percent of span.