
The T451 is a heat-only controller - I'm guessing yours may be controlling electric heat. Illustration at left of the Honeywell T415A and T651A from product literature. These controls are widely used to directly control 120-V equipment such as valves, fans, motors, contactors, and electric heat systems as well as fan coil units in heating/cooling systems. The Honeywell T451A room thermostat (illustration at left) is a line-voltage (120V) wall thermostat, a member of the product family including the T651 and T694 light duty line voltage wall thermostats. Serious electrical shock, burns or possible death. That power cannot be turned on by accident. Lock, tape or tag circuit breaker or fuse so

Watch out: Turn off power source to the heater before attempting installation, There is a two wire ( black and White ) 120 volt line I have a two wire honey well thermostat T451A - I want to replace this thermostat with a programmable. Reader Question: how do I replace & wire a Honeywell T451A electric-heat thermostat? LINE VOLTAGE THERMOSTAT INSTALLATION INSTRUCTIONS by BRAND & MODEL.INSTALLING an ELECTRICAL RECEPTACLE "OUTLET" on AN ELECTRIC HEAT BASEBOARD.WIRING a BUILT-IN THERMOSTAT on ELECTRIC BASEBOARD HEAT UNITS.WIRING a COOLING & HEATING CONVECTOR UNIT FAN THERMOSTAT.

WIRING a PROGRAMMABLE HEAT-ONLY LINE VOLTAGE THERMOSTAT.WIRING a MARLEY ELECTRIC BASEBOARD HEAT THERMOSTAT.WIRING 120VAC ELECTRIC BASEBOARD HEAT LINE VOLTAGE THERMOSTATS such as the Honeywell T451A, T651A, T694A,B,D,F.Shown here: a drawing of an older classic Honeywell wall-mounted thermostat controlling electric baseboard heat. To help you find a replacement thermostat for your original model we include manufacturer's electric heat thermostat cross-reference sheets. We list brands and models of electric heat thermostats including programmable and non-programmable models. In this article we give examples of wiring instructions for both 120VAC and 230/240VAC electric heat thermostats, including both wall-mounted models and "built-in" electric baseboard heater thermostats that mount at either end of the electric heating baseboard itself. Line Voltage Thermostats: choices, wiring, repair, replacement We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article describes types of line voltage wall or floor thermostats used to control heating or heating & cooling equipment where switching of 120V or 240V devices is required.

Guide to line voltage thermostats 120V or 240V room thermostats for electric heat, fan heaters, radiant floor heat, convector heaters. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
