PAD 100-DRTS Duct Remote Test Switch

The Potter PAD 100-DRTS (P/N 3992711) is a duct remote test switch for the Potter PAD-series addressable duct smoke detectors. Duct smoke detectors are installed inside HVAC ductwork where direct access for testing is difficult or impossible without opening ductwork panels or using ladders — creating safety hazards and lengthy maintenance windows. The PAD 100-DRTS solves this by providing a remote accessible test point that technicians can use to trigger a test function on the duct smoke detector from an accessible wall-mounted location without entering the duct or working at height.

Duct smoke detector testing is a mandatory requirement under NFPA 72 and is one of the most labor-intensive fire alarm inspection tasks in commercial HVAC-integrated systems. The PAD 100-DRTS significantly reduces the time and safety risk involved in this testing — a single technician can perform the test from ground level rather than requiring a two-person crew with lift equipment. For commercial smoke detector maintenance programs in large facilities with extensive HVAC systems, the PAD 100-DRTS is a high-value component that pays for itself in reduced inspection labor costs.

The switch is addressable and communicates directly with the fire alarm slc loop, allowing the fire alarm control panel to identify the specific duct detector being tested without manual zone identification. This is particularly valuable in large buildings with multiple ac smoke detector installations where zone confusion during testing can create documentation errors in fire alarm inspection and test records.

Mounting Location

Install the PAD 100-DRTS at an accessible wall location near the duct smoke detector it serves — typically within the same mechanical room or HVAC equipment room. The remote test switch must be clearly labeled to identify which duct detector it controls. NFPA 72 requires duct smoke detectors to be tested at each required inspection interval, and the PAD 100-DRTS makes this test accessible without ductwork penetration.

SLC Addressing

The PAD 100-DRTS is an addressable device that must be assigned a unique address on the fire alarm slc loop before commissioning. Verify the address assignment matches the system design drawings and that the fire alarm control panel correctly identifies the device during the commissioning test. Document the address assignment in the fire alarm inspection and test records.

Annual Testing Protocol

During annual fire alarm inspection, use the PAD 100-DRTS to trigger the test function on each connected PAD-series duct smoke detector. Verify the fire alarm control panel receives and correctly identifies the alarm from the tested detector. Fire alarm inspection and test records must document each duct detector test and retain records for the AHJ-required retention period.

Is the PAD 100-DRTS required for all duct smoke detectors?

While not always mandatory, the PAD 100-DRTS is strongly recommended wherever the duct smoke detector is installed in a location that makes direct access for testing impractical or unsafe. NFPA 72 requires duct detectors to be tested, and if the detector cannot be safely accessed without special equipment, a remote test switch is the practical compliance solution.

Is this compatible with conventional (non-addressable) duct detectors?

No. The PAD 100-DRTS is designed exclusively for the Potter PAD-series addressable duct smoke detectors. Conventional duct detectors use different remote test switch configurations. Using an addressable remote test switch with a conventional detector is not supported and will not function correctly.

How does the DRTS reduce inspection time?

Without a remote test switch, testing a duct smoke detector requires direct access to the detector — typically involving a ladder, lift equipment, and ductwork panel removal. The PAD 100-DRTS allows the smoke detector checker function to be triggered from ground level with a simple switch activation, reducing the time required per detector test from 15-30 minutes to under 2 minutes in accessible installations.