A.o. Smith 100076100 Surge Protection Box Kit

Product Description

The A.O. SMITH 100076100 is a surge protection box kit designed to safeguard tankless water heater electronics from voltage spikes and electrical surges. Tankless water heaters rely on sensitive control boards and ignition electronics that are vulnerable to power fluctuations. This kit provides a protective barrier between the incoming power supply and the unit's internal components, helping preserve the service life of the water heater and reducing the risk of surge-related failures. It is installed by licensed plumbers and HVAC technicians as part of new installations or added during service calls on existing tankless units.

This surge protection kit is intended for use with A.O. SMITH tankless water heater models across multiple product families, including both natural gas and propane configurations. It is applicable in residential tankless installations where electrical surge protection is required or recommended. The kit is compatible with a wide range of A.O. SMITH tankless units in indoor, outdoor, direct-vent, and non-condensing configurations.

Key Features

• Protects tankless water heater control electronics from voltage surges and spikes
• Compatible with both natural gas and propane tankless water heater models
• Covers indoor and outdoor unit configurations including direct-vent installations
• Packaged as a complete kit for straightforward field installation
• OEM part ensuring proper fit and function for listed A.O. SMITH models

Compatibility

Compatible with the following A.O. SMITH tankless water heater models: TK-310C-NI (NG), T-KJR2U-IN (NG), T-H3S-OS (NG), T-H3J-DV (NG), T-H3J-DV (LP), T-H3-OS (LP), T-D2U-IN (NG), T-K3-SP (NG), T-H3J-OS (NG), T-D2U-OS (NG), T-H3S-OS (LP), T-K3-SP (LP), TK-540P-PEH (LP), TK-110C-NI (NG), T-K4U-IN (NG), T-K2 (LP), T-K2 (NG), T-H3S-DV (NG), T-H3-DV (LP), T-KD20 (LP), TK-540P-PIH (LP), T-KJR2U-OS (NG), TK-540P-NEH (NG), T-H3S-DV (LP), T-H3-OS (NG), T-K3-OS (NG), T-K3-OS (LP), T-H3-DV (NG), T-H3J-OS (LP), T-KD20 (NG), T-K4U-OS (NG), TK-540P-NIH (NG), TK-510C-NI (NG).

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off power to the water heater at the circuit breaker before beginning any electrical work. Follow all applicable local electrical codes and manufacturer wiring guidelines when connecting the surge protection kit. Do not restore power until all connections are secure and the installation is complete.