The line from my panel comes into a junction box just above the heaters. Single-pole thermostats are sometimes known as "two-wire" thermostats, while double-pole thermostats are called "four-wire." For wall-mounted installation, these instructions also assume that an electrical box has been installed in the proper location in the wall. Extend a fish tape down into the thermostat's opening. Route remaining thermostat wires marked T1 and T2 to the baseboard heater. Criteria to Choose the right Baseboard Heater Thermostat Connect each wire in the wiring box with one wire from the thermostat. With double-pole thermostats, both hot wires entering the thermostat box are attached to the thermostat. Thermostats also can wear out and require replacement. In single-pole thermostats, only one of the two hot wires entering the thermostat box is attached to the thermostat, and the other wire bypasses the thermostat box and continues to the baseboard heater. I have 120v baseboard heaters. Typically this is done with a short green or bare copper wire attached to the metal box with a green grounding screw, with the other end of the pigtail joined to the circuit grounding wires with a wire connector. How to install: Wall thermostat , double-pole on 240V baseboard | … 8.6/10 our score. Loose Connections . 3. If it does have a green grounding lead, join this to the other circuit grounding wires. Step 8. If not, the arrangement will not function as it ought to be. The Spruce uses cookies to provide you with a great user experience. All four wires in the existing electrical box are hot coming in. By using The Spruce, you accept our, How to Wire a 240-Volt Double-Pole Thermostat, How to Wire a 240-Volt Single-Pole Thermostat, Understanding Electric Water Heater Wiring, How to Install a Line Voltage Thermostat for a Baseboard Heater, How to Make Pigtail Electrical Wire Connections, How to Repair a Wall-Mounted Electric Heater, How to Replace a Standard 120-Volt Outlet Receptacle, How to Install a 240-Volt Electric Baseboard Heater, How to Wire and Install Single-Pole Switches, How to Install a Single-Pole Dimmer Light Switch, How to Fix a Hot or Buzzing Dimmer Switch, Understanding Electrical Grounding in Household Wiring, How to Wire an Electrical Circuit Breaker Panel. Mark the location using the “old work” box as a template. I need to know what black and white wires connect to the source and the black and red wires that connect to the heater. Trace heater circuit and verify the heater is wire properly. Open the main panel door and look for a tripped breaker. 1. Using wire connectors, connect a hot supply wire, which is typically black, to thermostat wire one (typically it is marked L1 or Line). Reduce wattage in circuit. Unpackage the thermostat and carefully read the instructions and the wiring schematic. The thermostat itself usually does not have any grounding connection. Drill a 1/4-inch … Check the wires from the circuit breaker to the baseboard thermostat and look for wire … I have a HHBT-2 thermostat that is for a 220 volt baseboard heater. Use a wire connector to join the white feed wire to the white outgoing wire(s). Get daily tips and tricks for making your best home. The bare copper wires from each cable entering the box need to be joined together with a wire connector, and the metal box also needs to be grounded with a "pigtail" wire that links to the circuit grounding wires. Frank is confused about series and parallel wiring. A 240 volt thermostat doesn't use neutral wires, and as such all wires are hot. Snake the tape down until it is visible in the … This manual thermostat's versatility is increased substantially with its implementation of a 2 or 4 wire non polarized connection. The wires are L1 and L2, T1 and T2. For double-pole thermostats: Step 7. Most baseboard heating systems use 240-volt circuits, but 120-volt heaters are also available; they are often used to provide supplemental heat in individual rooms. Mechanical operation, non-programmable thermostat 120 - 240-Volt; 4 wire Use wire connectors to join the two feed wires entering the box from the power source to the wire leads on the thermostat marked "Line." The thermostat itself usually does not have any grounding connection. Connect the Circuit Breaker. These preliminaries will be already be handled if you are replacing an existing thermostat, but a new heater installation will involve running a new cable, installing a new electrical box, and mounting a baseboard heater on the wall. Connect the black circuit feed wire to the wire lead on the thermostat marked "Line," using a wire connector. 1. A wiring diagram is a streamlined standard pictorial depiction of an electrical circuit. Make sure the circuit breaker controlling the wires is shut off, and use a non-contact circuit tester to test for current at the thermostat box. The easy-to-install Honeywell Manual Electric Baseboard Thermostat works on 4-wire (double pole) electric heat applications (baseboard or line volt) and allows for simple, worry-free operation. King Electric Hoot WiFi Line Voltage Programmable Thermostat, 120/208/240V, Double Pole (2) Model# K902-B ... 2-wire programmable thermostats. The common wire, sometimes referred to as the c-wire, is what’s responsible for delivering constant power to your thermostat. Draw an outline around it. Timothy Thiele is an electrician who advises residential DIYers on how to make home installation projects safe and easy. Make sure power is off. 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