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
5 of 6
INDICATION/CONTROLS DESCRIPTION
Red LED
......................................LED illuminates when water is detected
Green LED ..................................LED illuminates when normal power is applied
Reset Button (SW1)
.....................
Resets manual alarm contact (only if water is no longer present)
FIELD CONFIGURABLE JUMPER (J1) SET UP
The jumpers on J1 are used to set whether the relays
are “Latching” or “Non-Latching”, and whether they are
“Supervised” or “Unsupervised”. These setting are described
in the Operation Sequence section below.
OPERATION SEQUENCE
When power is applied, the green LED will illuminate and
the unit will start to detect for water at the sensor probe.
When there is no detection of water (normal condition), the
relays are not in an alarm state and the red LED remains
off. For units in the “Unsupervised” relay mode, the relays are de-energized. For units in the “Supervised” relay
mode (default), the relays will be energized. (Note: When there is a loss of power, a supervised relay will drop out
indicating a water detection alarm.)
Within 5 seconds of water detection, the relays go into an alarm state and the red LED illuminates. For units in the
“Unsupervised” relay mode, the relays are energized. For units in the “Supervised” relay mode (default), the relays
are de-energized.
If the unit is in “Non-latching” or auto-reset (default) operation, then the alarm state will automatically reset when the
water has dried up. If the unit is in “Latching” or manual-reset operation, then the unit will stay in an alarm state until
the reset button is pressed or power is cycled. If there is still water detected during a reset button push, the unit will
not reset. If there is still water detected after a power interrupt, the unit will initiate another alarm within 5 seconds.
COMMISSIONING
1. After the unit is installed and wired, turn on the power. (24VAC +/- 10%)
2. Check that the green LED is “on”. If it is not “on”, check the power source.
3. Dampen a cloth or sponge and touch both the sensor probe tip and the sensor base. An alarm should occur
within 5 seconds.
4. The red LED should illuminate and the relay(s) should de-energize, or energize if set up as unsupervised. (To
check relay status, measure the resistance at the relay contacts or monitor the status from the BAS screen.)
5. Remove the dampened rag or sponge to clear the alarm. If the unit is set up for a non-latching relay (J1 jumper
across the “N” pins), the red LED and relay(s) will energize, or de-energize if set up as a unsupervised relay. If
the unit is set up for a latching relay (J1 jumper across the “L” pins), the operator must push the reset switch on
the detector board or interrupt power to clear the alarm.
6. Check the depth screw (see Mounting Section) to be sure it’s at the appropriate water depth for alarm.
Set Up and Commissioning
Detectable Liquids
The sensors are designed to detect the presence of water and other conductive fluids. BAPI has performed tests on
multiple liquid types to see which are detectable and which are not. Before leaving the installation, always check the
sensor with the liquid you are trying to detect as every environment and application may be different.
DETECTABLE:
Water, De-ionized water, Distilled Water, Reverse Osmosis (RO) Water
NOT DETECTABLE:
Oil, Diesel Fuel, Unleaded Fuel
Fig. 16:
Reset Button
Fig. 17:
Jumper J1 Settings
Non-Latching
Unsupervised
Latching
Unsupervised
Non-Latching
Supervised
Latching
Supervised
