Wall Thermostat Installation Kit

The Rinnai Wall Thermostat Installation Kit (model 204000045) connects any standard thermostat or Wi-Fi enabled smart thermostat to Rinnai Energy Saver Direct Vent Wall Furnaces (T Series). This kit enables remote temperature control and zone heating customization, replacing the built-in thermostat located on the furnace itself with a wall-mounted thermostat positioned where you actually measure room temperature. The kit allows homeowners to manage heat remotely via smart devices when paired with Wi-Fi thermostats, delivering optimum comfort, efficiency, and convenience.

• Universal Thermostat Compatibility: Connects to any standard thermostat or Wi-Fi enabled smart thermostat system. This flexibility lets you choose the thermostat interface you prefer, from basic dial controls to app-based smart home integration.
• Remote Heat Management: When linked to a Wi-Fi enabled thermostat, the kit allows homeowners to control heat remotely via smart devices. You can adjust temperature from anywhere, program heating schedules, and integrate the furnace into whole-home automation systems.
• Customizable Zone Heating: Enables homeowners to customize supplemental or zone heating to fit usage needs. You control exactly when and how much heat each space receives, improving comfort and reducing gas consumption.
• Optimized Temperature Sensing: Moves temperature control from the floor-adjacent built-in thermostat on the furnace to a wall-mounted location. This produces more accurate room temperature readings and more stable heating cycles, reducing the temperature swings caused by outdoor conditions affecting the furnace-mounted sensor.
• Simple Installation Process: Designed for straightforward installation in both new and existing Rinnai T Series wall furnace setups. The kit includes all necessary wiring components and an installation control board that mounts inside the furnace cabinet.
• Enhanced System Performance: Transforms the furnace from manual on-unit control to fully automated thermostat operation. The system cycles more efficiently, maintaining consistent temperature without constant manual adjustment.

This kit is designed exclusively for Rinnai Energy Saver Direct Vent Wall Furnaces (T Series), including models EX38DT, EX38DTWP, and EX38CTP. The kit requires a 120V electrical outlet behind or near the wall furnace to power the included transformer. The kit does not include a thermostat; you supply any standard 24V heat-only thermostat or Wi-Fi smart thermostat compatible with heating systems. For thermostats requiring a common wire (C wire), the kit provides wiring terminals to support that connection.

Installation involves mounting the control board inside the furnace cabinet, connecting the provided transformer to a 120V outlet, and wiring the thermostat using the included low-voltage wiring and connectors. The transformer is large and requires consideration of outlet placement behind the heater. Wiring the kit to thermostats requiring a common wire uses specific terminal assignments: the blue wire directly across from the black wire on the control board serves as the common terminal, while the opposite blue wire connects to the white transformer wire. The C wire for the thermostat connects to the same terminal as the black wire. Once installed, the kit requires no ongoing maintenance.

• Installation control board
• 24V transformer with power cord
• Low-voltage thermostat wiring
• Wire connectors
• Installation instructions

A: Yes, the Rinnai Wall Thermostat Installation Kit (204000045) is compatible with the EX38DT and other Rinnai Energy Saver Direct Vent Wall Furnaces in the T Series. The kit is specifically designed to connect standard or Wi-Fi thermostats to these furnace models, enabling wall-mounted temperature control.

A: The kit works with any standard thermostat or Wi-Fi enabled smart thermostat designed for heating systems. This includes basic non-programmable thermostats, programmable models, and Wi-Fi smart thermostats that integrate with home automation platforms. The kit provides 24V power and supports thermostats requiring a common wire connection.