| Supply Voltage | 240 Vac 15A |
| Frequency | 50 Hz; 60 Hz |
| Electrical Connections | 6 in. (150 mm) tinned copper lead wires |
| Electrical Ratings | Maximum Load: 15 A (resistive only), 3120 W @ 208 Vac, 3600 W @ 240 Vac |
| Operating Temperature | 32 F to 120 F |
| Ambient Temperature | 32 F to 158 F |
| Mounting | Vertical |
| Application | Electric Heating; Baseboard heater; Radiant ceiling; Convector or Fan-forced Heater |
| Used With | Aube RC840 Series Electromechanical Relays |
| Dimensions | 4.9 in. X 2.8 in. X 0.9 in. |
| UL | Approved |
| CSA | Approved; Compliant to CAN/CSA-C828-06 |
| Power Method | Hardwired |
| Color | White |
| Sensor Element | Thermistor |
| Differential Temperature (F) | 1 F |
| Switching Action | SPDT |
| Switch Type | Epoxy-soundproofed relay |
| Programmability | 7 Day program |
| Setting Temperature Range (F) | 40 F to 86 F |
Description
The TH115-A-240D-B is a line-voltage thermostat from Resideo (Honeywell Home) for electric resistance heat — baseboard, convectors, radiant ceiling or panel heaters, wired for 240 V.
Line voltage is the distinction that matters here. A low-voltage thermostat switches a 24 V control circuit and lets a furnace or boiler do the work; a line-voltage thermostat carries the full heater current itself. They are not interchangeable, and a low-voltage stat wired to a baseboard circuit fails immediately.
This is a double-pole thermostat: it breaks both legs of the supply, so the heater is fully de-energized when the thermostat is satisfied or turned off. Double-pole is what most jurisdictions require on 240 V baseboard, and it is what makes the heater safe to work on with the thermostat off.
The 7-day schedule lets the heat drop back when the room is empty and recover before it is used again. On electric resistance heat, where every watt is billed at full price, setback is the single largest saving available — there is no efficiency to improve, only run time to remove.
Match the voltage and the pole configuration to the heater circuit, and check the amperage of the heater against the rating of the thermostat. A thermostat sized below the load is the most common cause of a line-voltage stat failing in its first season.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: TH115-A-240D-B/U
- Type: Line-voltage thermostat
- Voltage: 240 V
- Poles: Double-pole
- Control: Programmable 7-day
- UPC: 775264924804
- Category: Line Voltage Thermostats