This file is the T834C heating-cooling thermostat user manual, which introduces the product's features and usage methods.
The T834C thermostat controls 24 to 30 Vac single‑stage heating‑cooling systems and is offered in several model variants (e.g., T834C1137, T834C1541, T834C2267, T834C2309) for standard, gas‑ or oil‑fired, and heat‑pump applications. The manual explains the device’s internal mercury switch, system and fan switching functions, and the adjustable heat anticipator.
Installation instructions cover locating the thermostat about 5 ft above the floor, avoiding drafts, mounting on a wall or outlet box with Honeywell part numbers 193121A or 202689A, and wiring according to local codes. Setting procedures detail temperature lever adjustment, heat anticipator calibration, fan‑switch operation, and a detailed recalibration process using a calibration wrench.
| Control voltage | 24 to 30 Vac |
|---|
Adjust the heat anticipator indicator to match the current draw of the primary heating control or follow the manufacturer’s recommendation; for electric heat systems set it to the combined current draw of heating and fan relays.