Mercury Thermostat Wiring Oil Furnace

The line voltage feeding the furnace to operate the fan blower motor is transformed down to a safer level of 24 volts the gas control valve needs 24 volts to open and after making a series loop through at least one safety device the most basic and mandatory one is an over temperature shut down the power goes up to the thermostat and when the room temperature falls below the set point.

Mercury thermostat wiring oil furnace. When it gets too cold in the room the spring tilts the w end down and the mercury completes the furnace circuit asking for heat. New thermostats are safer for the. What i want to talk about today is mercury thermostats how theyre more energy efficient and can allow you to save up to 200 a year on cooling or heating costs. Changing a mercury thermostat to a digital.

This one covers the limitations of thermostat wiring that can be done with the oil furnace primary control. To wire a thermostat of this kind basic electrical skills tools and safety techniques are required. You can also check for a voltage listing inside the cover of the thermostat or on the heat pump furnace inside the access door boiler or the electrical baseboard unit itself. These run from the thermostat to the furnace and control the heat in a home.

Some many homes and businesses still have these thermostats in use so we will offer a. Two wire thermostats typically have a red and a white wire. By contrast wires for low voltage thermostats are very thin similar to wiring for doorbells or telephone jacks. The mercury switch thermostat hvac control mercury switch thermostats are not available for purchase in many statesthey have been banned because they contain mercury and it is important to properly dispose of these thermostats that contain mercury if they are changed out for newer digital thermostats.

This video is part of the heating and cooling series of training videos made to.