Dwyer Instruments SERIES EWDP Catalog Page

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M20X1.5

[Ø5.95]

SERIES EWDP

WIRELESS COMMUNICATING ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH

EnOcean® Wireless Technology

PRESSURE

[99.21]

The SERIES EWDP Wireless Communication Adjustable Differential Pressure Switch uses EnOcean pressures. The dual scaled adjustment knob in inches of water column and pascals allows changes to the pressure set point to be made without a pressure gage. The battery-powered switch is equipped with radio module for frequencies of 902 MHz or 868 MHz which sends a signal wirelessly to a Series USB-300 receiver at each change of status. The silicone diaphragm makes this series ideal for use with air and other non-combustible gases. The EWDP is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The compact size, adjustment knob, and wireless capabilities make the EWDP the perfect choice for HVAC applications in temporary

installations or retrots of existing buildings.

FEATURES/BENEFITS

• Wireless ability allows for easy installation in buildings with concrete or marble walls

• No wires need to be connected, allowing for remote monitoring reduces downtime

• Dual scaled set point adjustment knob to quickly and easily set the value to activate the switch

wireless technology to monitor pressure, vacuum, and differential

[85.73]

4x 11/64

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CABLE GLAND

SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Diaphragm material: Silicone; Housing material: POM; Switch

Body: PA 6.6; Cover: Polystyrene. Temperature Limits: Process and Ambient: 14 to 158°F (-10 to 70°C); Storage: -40 to 185°F (-40 to 85°C).

Pressure Limits: 40 in w.c. (10 kPa). Process Connections: 5/16˝ (7.94 mm) outside diameter tubing, 1/4˝ (6.0 mm)

inside diameter tubing. Power Requirements: (1) 3 V CR2032 lithium metal battery, installed nonfunctional, user replaceable (included).

Enclosure Rating: NEMA 3 (IP54). Mounting Orientation: Vertically, with pressure connections pointing downwards. Weight: 5.3 oz (150 g). Agency Approvals: CE.

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Differential Pressure Switches

APPLICATIONS

• Monitoring air lters and ventilators

• Monitoring industrial cooling air circuits and ventilation ducts

• Overheating protection for fan heaters

• Controlling air and re protection dampers

MODEL CHART

Model Frequency EWDP-08-2-L-N

EWDP-04-2-L-N EWDP-03-2-L-N EWDP-05-2-L-N EWDP-06-2-L-N EWDP-07-2-L-N EWDP-08-2-L-N EWDP-04-2-L-E EWDP-03-2-L-E EWDP-05-2-L-E EWDP-06-2-L-E EWDP-07-2-L-E

Note: For models that include an installer kit, add –C to the end of the model number. Installer kit

includes two static pressure tips and 7 ft of PVC tubing.

ACCESSORIES Model Description A-288

A-289 A-480 A-481 A-489 USB-300U USB-300

902 MHz 902 MHz 902 MHz 902 MHz 902 MHz 902 MHz 868 MHz 868 MHz 868 MHz 868 MHz 868 MHz 868 MHz

“L” type metal mounting bracket with screws “S” type metal mounting bracket with screws Plastic static pressure tip Installer kit. Includes 2 plastic static pressure tips and 7´ (2.1 m) of PVC tubing

4˝ straight static pressure tip with ange

USB wireless receiver, 902 MHz USB wireless receiver, 868 MHz

Set Point Range in w.c. (Pa)

0.08 to 1.20 (20 to 300)

0.12 to 1.60 (30 to 400)

0.20 to 2.00 (50 to 500)

0.80 to 4.00 (200 to 1000)

2.00 to 10.00 (500 to 2500)

4.00 to 20.00 (1000 to 5000)

0.08 to 1.20 (20 to 300)

0.12 to 1.60 (30 to 400)

0.20 to 2.00 (50 to 500)

0.80 to 4.00 (200 to 1000)

2.00 to 10.00 (500 to 2500)

4.00 to 20.00 (1000 to 5000)

Approx. Deadband @ Min Set Point in w.c. (Pa)

0.04 (10)

0.06 (15)

0.08 (20)

0.4 (100)

0.6 (150)

1.0 (250)

0.04 (10)

0.06 (15)

0.08 (20)

0.4 (100)

0.6 (150)

1.0 (250)

Approx. Deadband @ Max Set Point in w.c. (Pa)

0.05 (12)

0.09 (22)

0.09 (23)

0.5 (130)

0.8 (200)

1.4 (350)