1. www.hvac.vn Water Detectors The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.

2. www.hvac.vn Overview WD – Water Detector and Sensor Tape WD3 – Water Leak Detector

3. www.hvac.vn WD - Introduction Designed for dependable detection of low levels of conductive liquids Water sensing tape attaches to module and if any liquid comes in contact with the tape the resistance is changed and the alarm will be triggered Tape is hydrophobic. Faster drying time since tape doesn’t absorb

4. www.hvac.vn WD - Key Specifications Switch Type: DPDT Electrical Rating: 1 A @ 24 VAC/VDC Power Requirements: 24 VAC, 24 to 30 VDC Power Consumption: 35 mA maximum Enclosure: Extruded aluminum Sensor Tape: 1˝ (25.4 mm) wide and 5´ (1.5 meters), 10´, 15´ or 25´ (8 meters) long

5. www.hvac.vn WD - Features Sensing tape is 1˝ wide and can be bought in lengths of 5´ (1.5meters), 10´, 15´ and 25´ (8meters) Multiple tapes can be connected together to extend the coverage area (120 meter max) Power and alarm LED’s, Other features include alarm test switch, continuous tape integrity self check and extendable tape sensor

6. www.hvac.vn WD - Applications Leak detection for large equipment Furnaces, boilers, chillers, Data Centers, etc Tape can cover the whole floor under the equipment

7. www.hvac.vn WD - Applications Evaporator pans under refrigerators, freezers, and air handlers General utility rooms in plants

8. www.hvac.vn WD3 - Introduction Detects the presence of water to prevent water damage Audible and visual alerts provide local indication of the alarm condition Internal switch will give remote indication or control to prevent further build up of water

9. www.hvac.vn WD3 -Key Specifications Switch Type: Battery Powered Models: SPST NO External Powered Models: DPDT Audible Alarm: At least 85 dB @ 1 foot distance (depends on model). Visual Alarm: Red LED for water level Yellow LED for low battery (battery powered models only) Green LED for power condition (external powered models only)

10. www.hvac.vn WD3 - Key Specifications Enclosure Material: ABS and polycarbonate with flammability classification UL 94 V-0. Enclosure Rating: Audible Alarm Models: Water-tight up to 3/4 of the body height Non-Audible Alarm Models: NEMA 6P (IP 68) submersible Agency Approvals: CE, RoHS

11. www.hvac.vn WD3 - Technology The sensor consists of two electrical contacts When the water level reaches a certain level, it bridges the contacts and allows current to flow

12. www.hvac.vn WD3 - Features Depending on the model ordered Audible and visual alerts provide local indication of the alarm condition Internal switch will give remote indication or control to prevent further build up of water Sensing height can be adjusted by using bracket Mounting bracket can attach to any flat surface by either using the attached adhesive strips or mounting screws Can be battery-powered or externally powered

13. www.hvac.vn WD3 - Applications Condensate leak detection Air handlers, fan coil units, unit ventilators, data centers

14. www.hvac.vn WD3 - Applications Under-floor air systems Raised floors serve as the air circulation space for heating and cooling