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August 31, 2026 2 min read
HAI UPB Powerline Phase Coupler (39A00-1) — Installation Instructions
Installation and operating instructions for the HAI UPB™ Powerline Phase Coupler, model 39A00-1, which couples the UPB™ powerline signal from one electrical phase to another (e.g. Line 1 to Line 2) to ensure adequate signal strength for whole-home UPB™ lighting/control systems in larger homes.
The UPB™ protocol is robust and less susceptible to powerline noise than older X10-style protocols, but HAI still recommends installing a Powerline Phase Coupler in every UPB™ installation to guarantee the powerline signal reaches devices on both electrical phases of a split-phase (residential) service panel.
The unit is wired between two 15A breakers on opposite phases (Line 1 and Line 2) in the breaker panel, with the Phase Coupler itself mounted in a single-gang wall box near the panel, per the wiring diagrams in the original manual.
HAI warrants this product against defects in material and workmanship, under normal use and service, for two (2) years from the date of purchase. During the warranty period HAI will repair or replace the product at its sole option. The warranty does not cover removal/reinstallation costs, normal wear, damage while in the customer's possession (other than from defect), improper installation (including failure to follow written instructions), alteration, misuse, or abuse. Implied warranties are limited to two years from the purchase date; some limitations may not apply depending on state law.
For warranty/repair service within the continental United States, send the defective unit (postage prepaid, carefully packaged) with a description of the trouble, name, return address, and phone number to: HAI, Repair Department, 4330 Michoud Blvd, New Orleans, LA 70129. HAI pays return shipping via normal ground service. Outside the continental U.S., contact an Authorized Distributor.
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