Termination and Troubleshooting
Water Leak Detector (BA/LDT) 5 Amp Relays
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
rev. 09/01/21
26268_ins_LDT
6 of 6
Specifications subject to change without notice.
Specifications
Maintenance
Check the water sensor probe once a year to be sure there is no dirt or debris collected around the probes. Dirt or
debris around the probes may cause nuisance alarms in moist situations. Change the service intervals depending
on environmental conditions. In very clean conditions the probe may never need maintenance. Rope sensor may be
wiped down with isopropyl alcohol, warm soapy water on a cotton cloth or placed in a dishwasher.
Power:
24VAC ±10% (If VDC power is required, call your BAPI rep.), 5 Amp Relays: 4 Watt / 4 VA max
Rectification:
Half Wave
Wiring:
Screw Terminals: 2 to 4 pair of 12 to 22AWG (BAPI recommends 16 to 22AWG).
Water Detection Sensor: 2 wires (provided), optional Flex Connector or Liquid Tight Fitting for strain relief
Sensor:
Rope Sensor: Plenum-rated sensor cable, detects 1/8” of water. Max length: 100’ (30.5m)
Attached Sensor: Sensor w/ adjustable depth screw from 0.063 to 0.84” (1.60 to 21.34mm)
Remote Sensor: Sensor w/ adjustable depth screw from 0.062 to 0.5” (1.57 to 12.70mm)
(Attached and Remote Sensors are designed to be mounted to flat surfaces or on the rims of drip pans.)
Latching and Supervised Relay Options:
Latching ............
Relay stays in alarm until manually reset or power is cycled
Non-Latching
....
Relay automatically resets after water is removed (default)
Unsupervised....
Relay energizes on water detection
Supervised
........
Relay de-energizes on water detection (default) Note: Relay de-energizes on loss of power
Reset Action:
If latching, local pushbutton or power interrupt
Local Indication:
One green power LED, one red alarm LED
Alarm Relay Contacts:
LDT3: One SPDT, 5 Amp relay output
LDT4: Two SPDT, 5 Amp relay outputs
Operating Environment
Remote Sensor: -20 to 185ºF (-20 to 70ºC), 0 to 100%RH, condensing
Rope Sensor: 32 to 167ºF (0 to 75ºC), 0 to 95%RH, non-condensing
Detector (BB): -4 to 158ºF (-20 to 70ºC), 0 to 95%RH, non-condensing
Enclosure Material and Ratings:
NEMA 4 (IP66), UV-resistant polycarbonate, UL94 V-0
Agency:
RoHS, UL
Warranty:
5 years
Diagnostics
Possible Solution
1. Check for proper power to the unit (see power specs).
1. Check for proper power to the unit (see power specs).
2. Physically check for water to verify it’s touching both screws on the Attached
Sensor or Remote Spot, or touching the Rope Sensor.
3. Adjust sensor probe depth on the Attached Sensor or Remote Spot if necessary.
4. For Rope Sensor units, check the sensitivity adjustment as described on page 4.
1. Check for the presence of water or debris on the sensor.
2. Be sure the sensor wires are not shorted.
3. Push the reset button and/or cycle power.
4. For rope sensor units, check the sensitivity adjustment as described on page 4.
Possible Problem
Green LED Not On
Red LED Not
Working Or Alarm
Contact Not
Changing State
Unit Will Not Reset
