How to Install Night Owl Smart Doorbell WDB-20

Overview

Step-by-step install guide for the Night Owl WDB-20 Smart Video Doorbell replacing an existing wired doorbell. Covers pairing the doorbell to the Night Owl Protect app before mounting, installing the included Digital Chime Power Amplifier at the indoor mechanical chime, wiring the doorbell at the front door, and testing the ring and live view through the app.

What's Included

• 1 Night Owl WDB-20 doorbell with faceplate
• 1 Digital Chime Power Amplifier (in-wall unit)
• 1 mounting plate with screws and anchors
• 1 wedge mount and corner mount kit
• 1 reset pin tool (SIM-eject style)
• 1 USB-C charging cable for pre-pairing

Got your materials ready? Here's what to check first.

Before You Start

• Existing wired doorbell powered by 16V to 24V AC
• Mechanical indoor chime or digital chime
• 2.4GHz Wi-Fi reaching the front door at 3+ bars
• Wi-Fi security set to WPA2 (not WPA3)
• Night Owl Protect app and account already created
• Circuit breaker access for doorbell transformer

Tools & Requirements

Installation Steps

1

Cut Power and Measure Voltage

At the breaker panel flip off the circuit feeding the doorbell transformer (often labeled Doorbell or lives on a shared lighting circuit). Use a non-contact voltage tester at the existing doorbell wires to confirm power is off. Remove the old doorbell. Restore power briefly and use a multimeter to confirm 16V to 24V AC across the two wires. Cut power again before proceeding.

Needed for this step

Klein Tools 80196 Digital Multimeter Kit with C...

$46.15

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2

Pair the Doorbell Indoors First

Do not mount yet. Plug the included USB-C cable into the port under the faceplate and charge the internal battery to full (about 2 hours). Open Night Owl Protect, tap the plus icon, choose Video Doorbell, and scan the QR code on the back of the doorbell. When prompted connect to your 2.4GHz SSID. Wait for the voice prompt Device Connected before disconnecting USB-C.

3

Install the Chime Power Amplifier

Open the cover of your mechanical indoor chime. Note the Front, Trans, and sometimes Rear screw terminals. Wire the included Digital Chime Power Amplifier per the WDB-20 Smart Doorbell manual: one Amp lead to Front, the other Amp lead to Trans. This regulates current so your chime rings cleanly on press and does not buzz continuously. Tuck the Amp neatly inside the chime housing and close.

Needed for this step

201PCS Wire Stripper Tool Kit,Self-Adjusting 8"...

$28.99

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4

Mount and Wire the Doorbell

Hold the mounting plate against the door frame where the old doorbell sat. Pre-drill screw holes (3/32 inch bit in wood, masonry bit in brick). Screw the plate flush. Loop each existing bell wire clockwise under the two screw terminals on the mounting plate and tighten. Click the WDB-20 body onto the plate until it locks. Use the wedge or corner mount kit if the door frame is not flush.

Needed for this step

DEWALT 20V MAX* Cordless Drill/Driver Kit with ...

$168.71

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5

Restore Power and Test

Turn the breaker back on. The WDB-20 boot voice prompt plays within 30 seconds. Open Night Owl Protect and confirm the doorbell is Online. Press the doorbell ring button. The indoor mechanical chime should ring cleanly once and a push alert should hit your phone within 5 seconds. Open live view to verify the camera view. Reattach the faceplate and snap home with the included security screw.

Installation Tips

Still stuck? This is usually the deeper cause below.

Need More Help? Night Owl Security Support

Note: The contact information below connects you directly to Night Owl Security's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.