Resideo TL8100A1008/U 7-day Programmable Hydronic Thermostat

Product Description

The RESIDEO TL8100A1008/U is a 7-day programmable electronic thermostat designed for hydronic heating systems. It provides programmable temperature control without requiring separate thermostats for different hydronic applications. The TL8100A1008/U manages heat-only systems by switching 2-way zone valves, 3-way zone valves, or circulator pumps. Licensed HVAC technicians and plumbers install this unit in residential and light commercial hydronic zones where scheduled setback control is needed to reduce energy consumption during unoccupied periods.

This thermostat is suited for a wide range of hydronic heating applications including baseboard convectors, radiant floor systems, and fan coil units controlled by zone valves or circulators. Its heat-only configuration makes it appropriate for boiler-based systems where no cooling control is required. The 7-day programming allows independent schedules for each day of the week, supporting varied occupancy patterns in both residential and small commercial settings.

Key Features

• 7-day programmable scheduling with independent daily programs for maximum scheduling flexibility
• Compatible with 2-way zone valves, 3-way zone valves, and circulator pumps
• Heat-only control eliminates unused cooling circuitry in dedicated hydronic systems
• Single thermostat handles multiple hydronic application types, reducing the need for multiple SKUs on the truck
• Programmable setback capability supports energy savings during unoccupied or overnight periods

Compatibility

Designed as an OEM-style programmable control for hydronic heating systems using 2-way zone valves, 3-way zone valves, or circulator pumps in heat-only residential and light commercial applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber familiar with low-voltage hydronic controls. Power down the boiler and de-energize all zone valve or circulator circuits before removing the existing thermostat or making any wiring connections. Follow all applicable local mechanical and electrical codes, including NEC requirements for low-voltage control wiring. Do not apply line voltage to low-voltage terminals.

Technical Specifications

• Programming Type: 7-Day Programmable
• System Type: Heat Only
• Compatible Outputs: 2-Way Zone Valves, 3-Way Zone Valves, Circulator Pumps
• UPC: 085267298278

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: TL8100A1008/U