Watts BMS User manual

IS-FloodSensor-AirGap-BMS
You are required to consult the local building and plumbing codes prior to
installation. If the information in this manual is not consistent with local
building or plumbing codes, the local codes should be followed. Inquire
with governing authorities for additional local requirements.
WARNING
!
Monitor relief valve discharge with smart and connected
sensor technology to detect flooding and transmit notification.
The BMS Sensor Connection Kit activates the flood sensor,
enabling functions that detect flood conditions. When excessive
relief valve discharge occurs, the flood sensor energizes a
relay signaling flood detection and triggers real-time notification
of potential flood conditions through the building management
system, or BMS.
Use of the SentryPlus Alert®technology does not replace the
need to comply with all required instructions, codes, and regu-
lations related to the installation, operation, and maintenance of
the backflow preventer to which it is attached, including the
need to provide proper drainage in the event of a discharge.
Watts®is not responsible for the failure of alerts due to
connectivity or power issues.
NOTICE
Installation Instructions
BMS Sensor Connection Kit
Air Gap Flood Sensor
2" Male NPT Connection
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use infor-
mation can result in death, serious personal injury,
property damage, or damage to the equipment.
Keep this Manual for future reference.
WARNING
!

2
Contents
Kit Components .....................3
Requirements .......................3
Install the Flood Sensor................4
Mount the Sensor Activation Module .....5
Connect the Module Cable to
the BMS Controller ...................7

3
Kit Components
The sensor connection kit includes the following four components. If any item is missing, speak with
your account representative.
Requirements
• #2 Phillips screwdriver
• Polytetrafluoroethylene (PTFE) tape (optional)
• Instrument with small tip to change DIP switch settings
• Power source, ranging from 12V to 24V
• Wire stripper
A. Flood sensor with male 2" NPT connection
The connection kit is suitable for installation on a metal air gap
or pipe fitting with 2" female NPT connection.
NOTICE
B. Sensor activation module with an 8' 4-conductor electrical
cable, ground wire, and 4 attachment screws
C. 24V DC power adapter (requires a 120VAC, 60Hz,
GFI-protected electrical outlet)

4
1. (Optional) Apply PTFE tape to the threads of the flood
sensor for the best results.
2. Align the flood sensor to the air gap with a 2" female
NPT connection.
3. Twist on the sensor until it is flush with the air gap. Hand-
tighten the sensor up to 15 ft-lb. Do not overtighten.
Install the Flood Sensor
Attach the flood sensor to a metal device with 2" female NPT connection. Shown here with an
air gap.

5
Mount the Sensor Activation Module
Set the SW1 DIP switch on the sensor activation module by the wet threshold table
below then attach the module to the flood sensor.
DIP switches on the sensor activation module can be used to specify the wet threshold
(sensitivity to water discharge) through SW1 and the timer delay (duration before alarm)
through SW2. Scan the QR code for more information.
The sensor activation module receives a signal from the flood sensor when a discharge is detected. If the
discharge meets the conditions of a qualifying event, the normally open contact is closed to provide a
signal to the BMS input terminal.
The wet threshold value must be set to 50 to detect dis-
charges higher than 3 gpm. Change the value from 40
(default) to 50.
NOTICE
1. Use the #2 Phillips screwdriver to detach the four screws
on the sensor activation module to remove the cover.
2. Use an instrument with a pointed tip to slide the SW1
switches to the positions noted in the following table for
the wet threshold value of 50.
SW1: WET THRESHOLD OPTION
SWITCH POSITION REPORTED SWITCH
VALUE
WET THRESHOLD
VALUE
1 2 Illustrated
OFF OFF 0 40
OFF ON 2 50

6
Retain the dust cover to protect the flood sensor during
temporary instances when the sensor activation module
may need to be removed or replaced.
NOTICE
3. Press the RESET button to activate the new settings.
(Not required whenever SW1 is set before the power
adapter is connected to a power supply.)
4. Reattach the cover with the four screws, making sure
the O-ring inside the cover is properly seated to maintain
a seal.
5. Remove the dust cover from the flood sensor. 6. Remove the O-ring from the dust cover and place it on
the sensor activation module to create a seal between
the module and the flood sensor.
7. Align the sensor activation module with cable with the
flood sensor.
8. Tighten the screws attaching the activation module to the
flood sensor.

7
Connect the Module Cable to the BMS Controller
The 4-conductor sensor activation module cable must be attached to the BMS controller to transmit a
normally open contact signal and provide power to the sensor activation module. The contact signal
closes when a discharge is detected.
To connect the module cable to
the controller
1. Use the wire stripper to cut away enough insulation to
expose 1 to 2 inches of the conductor wires.
2. Insert the white and green wires into the input terminal.
Either the BMS power source (ranging from 12V to 24V)
or the 24V DC power adapter provided can be used. With
each power source, an earth ground connection is required.
If using the optional power adapter, skip to the next set of
instructions. Be sure to use the ground wire provided if there
is no other earth ground on the BMS controller.
NOTICE
To use the optional 24V DC power adapter
Distinguish the positive wire from the negative one. The
positive wire has white stripes and must be inserted into the
power terminal; the negative wire, into the ground terminal.
1. Connect the positive power adapter wire (black with white
stripe) to the red wire of the sensor activation module
cable and insert the wires into the power terminal.
2. Connect the negative power adapter wire (black with
no stripe) to both the black wire of the sensor activation
module cable and the ground wire (if needed) then insert
the wires into the ground terminal.
3. Plug the power adapter into a 120VAC, 60Hz, GFI-
protected electrical outlet.
The flood sensor LED is steady green when the unit is ready.
The earth ground must be connected to the BMS controller
before the flood sensor is put in operation.
WARNING
!
3. Insert the red wire in the power terminal. (A power source
ranging from 12V to 24V is required.)
4. Insert the black wire in the ground terminal.

IS-FloodSensor-AirGap-BMS 2304 0834333 © 2023 Watts
Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under
normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company
will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE
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FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the
Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of
repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays,
vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over
which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper
maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of inci-
dental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights,
and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS
IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE
DATE OF ORIGINAL SHIPMENT.
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