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WS-2DV prevents flooding and property damage by detecting moisture 

caused by accumulation of air-conditioning condensate, drain leaks, etc. 

When moisture is detected, the contacts controlling the system are disconnected. 

An additional contact connection is included, that may be used to operate an alarm 

device as well. Multiple WS-2DV may be connected in series (within the electrical 

limits of the power supply), to expand coverage area. WS-2DV incorporates isolated 

relay contacts, for added flexibility in installations with electronic control boards 

where breaking one lead from the transformer is not possible.

Installation

1. Turn off power to the system.

2. Place WS-2DV, padded side down, on the surface to be monitored. 

3. Connect wiring as shown in the diagrams on page 2. 

    Wires may be extended, but avoid excess run lengths. 

4. Restore power to the system.

5. Press “TEST” to assure proper function.

      It is recommended to verify operation of WS-2DV using the 

TEST

 and 

RESET

 

buttons at time of installation and at least annually thereafter.

Status Indications & Operation

Normal State:

 When power is applied and no moisture is detected, the 

“POWER ON” LED will be lit green, and the “MOISTURE” LED will be OFF.
Pressing the 

TEST

 button simulates moisture detection and confirms 

proper function of WS-2. “MOISTURE” LED will be lit red, & “POWER” 

LED will be OFF. 
Press the 

RESET

 button to return WS-2DV to normal state. 

When moisture is detected, the control circuit is opened, and the “MOISTURE” 

LED is lit red. WS-2DV will remain in this state until the problem is corrected 

and the 

RESET

 button is pressed, or power is disconnected. After correcting 

the moisture problem, & with power disconnected, use a clean, absorbent 

cloth to thoroughly dry the sensor pad 

on the bottom of WS-2DV. Any residual 

moisture in the pad may cause a 

false detection. A warm air 

device (such as a hair drier 

on low heat ONLY) may be 

used to help dry the pad.

800.995.2222

www.diversitech.com

CONDENSATE MANAGEMENT

No Power

ORG

-

GRN WHT

ORG

-

GRN WHT

12 to 30 VAC

12 VDC

Dry & Power

ORG

-

GRN WHT

ORG GRN

-

WHT

Wet & Power

ORG GRN

-

WHT

ORG

-

GRN WHT

Controlling Selected Components

System components such as compressors, electric valves, condenser pumps, chill 

water pumps, or other 24 VAC controls may be connected selectively and 

independently to WS-2DV.

WS-2DV can be powered from either VAC and VDC sources. Operation of the 

contacts varies depending on type of power provided:

NOTE: 

"-"

 indicates relay connection. 

LED Indicators
Wet Switch

Schematic

TEST & RESET

Buttons

Installation Instructions

Wet Switch

Dual Voltage Flood Detector WS-2DV

®

CONTACTS

RED ( + )

BLACK ( - )

ORANGE 

GREEN 

WHITE 

PUSH

TO

TEST

PUSH

TO

RESET

POWER IN

POWER ON

MOISTURE

12-30VAC

OR 12VDC

Wet Switch

®

 Flood Detector

DUAL VOLTAGE

MODEL NO. WS-2DV

CLASS II

CIRCUIT

240V

50/60HZ

3A MAX

50/60HZ 1.5 MAX

1.5 MAX

SEE USER GUIDE

FOR WARNINGS

Wet Switch

®

 is a registered trademark

of DiversiTech Corp.

Plenum Rated

0421

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