Low Range ZPM - Zone Pressure Sensor
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
Specifications subject to change without notice.
3 of 4
Installation & Operations
38926_ins_ZPM_LR
rev. 04/09/20
LED Off:
No power is applied or the unit is in 4 to 20 mA Mode
LED On:
LED is on when power is applied and voltage output is selected.
When 4 to 20 mA output is selected, the light is on for 2 seconds at power up
then goes off.
LED Blinking Fast:
Auto-Zero or Error Mode
LED Blinking Slow:
The pressure measurement is above or below the
selected pressure range. Note: When the reading is above or below the
selected pressure range, the LCD on the face of the unit will alternate between
showing the actual reading and showing “err”.
Output Termination
Status LED Operation
Fig 7:
Status LED on the
inside of the cover
Auto-Zeroing must be done after the initial setup and after any changing of
settings.
1. Make sure power is applied
2. Deadhead ports
4. Press the Auto-Zero button for 2 seconds (LED blinks)
5. Remove deadhead after LED stops blinking
6. Attach system tubing
Auto-Zero Operation
Fig 6:
Auto-Zero
Button
BAPI recommends wiring the product with power disconnected.
Proper supply voltage, polarity and wiring connections are important
to a successful installation. Not observing these recommendations
may damage the product and void the warranty.
PWR
Terminal
GND/4-20
Terminal
Vout
Terminal
Fig. 7:
ZPM Wiring Terminals
To ensure that all wires are properly terminated, twist the stripped ends of each
wire together before inserting into the terminals. Gently tug on the wire after
inserting into the terminal to verify a good connection.
Output Signal
PWR Terminal
GND/4-20 Terminal
Vout Terminal
4 to 20 mA
7 to 40 VDC
4 to 20 mA Signal To
Controller Analog Input Not Used
0 to 5 or 1 to 5 VDC
7 to 40 VDC
or 18 to 32 VAC
To Controller Ground
VDC Signal To Controller
Analog Input
0 to 10 or 2 to 10 VDC
13 to 40 VDC
or 18 to 32 VAC
To Controller Ground
VDC Signal To Controller
Analog Input
Table 1: ZPM Termination
