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How does a fan sequencer work?
The sequencer is essentially a series of conduits that prevent the voltage from entering the electric furnace from turning on all the heating elements at one time. The heating elements are the electrical coils that warm up as electricity passes through them; they’re what actually heats the air.
What is a fan sequencer?
The sequencer does the job of staggering the heating elements so they turn on one at a time, in “sequence.” The sequence does this by acting as a series of circuits that close one at a time, allowing electrical power to move farther down the system to each of the heating elements in turn.
How do you know if a sequencer is bad?
The Signs a Furnace Sequencer Is Bad Your heating elements may not turn on at all, and then the furnace won’t be able to heat your house. It’s also possible that the sequencer will lose control over the coils so that they all come one at once. When that happens, the circuit breaker will probably trip.
What is the difference between a contactor and a sequencer?
A sequencer uses low-voltage electrical energy to warp the bimetal inside it. A contactor uses low-voltage electrical energy to magnetize the solenoid and then pass power to high-voltage devices.
What type of coil is inside the sequencer?
The sequencer sits between the heating elements and the thermostat on the furnace. Its outer housing is a square of heat-resistant plastic through which a small heating coil passes. Stacked above the heating coil are two or more heat-reactive circuits. There is one such circuit for each heating element.
Is a sequencer a switch?
Sequencers are basic relays that use a heater coil and a bimetal switch. The heat causes the bimetal switch to flex, making contact across the switch and sending power to the elements.
How many contacts can a sequencer have?
Some sequencers may have 5 circuits- three heat circuits, a fan circuit and a circuit to pass power to another sequencer if needed.
How many heaters can a typical package sequencer energize?
AS MANY AS 3 SEQUENCERS MAY BE CONNECTED THROUGH THE AUXILIARY SWITCH TO CONTROL UP TO 9 HEATING ELEMENTS. THE SEQUENCER CAN BE USED ON MOST FURNACES USING LINE VOLTAGE LIMITS FOR 240 VOLT AND 240/120 VOLT ISOLATED FAN AND 240 VOLT COMBIN- ATION RATED WIRING SYSTEMS.
Where is a sequencer located?
The sequencer is between the heating elements and the thermostat. When you turn the thermostat to a setting requiring the furnace come on, the thermostat a current to the sequencer first. The sequencer contains a series of heat reactive circuits that prevent the current from passing through them all at once.
What is a step sequencer?
A step sequencer is a sequencer that operates by dividing a measure into a pre-determined number of divisions, or “steps.” Each step can then trigger notes, send a voltage, control a parameter value, or trigger or control other events.
What are the different types of fan motors?
As you probably know, fan motors can be designed for several different purposes. Most common of these are single phase motors. Other types of fan motors, like split phase and capacitor start motors, are intended for industrial environments and they are very common in factories and warehouses.
How do you test a fan motor with a multimeter?
How to Test a Fan Motor With a Multimeter. Test the first set of wires: Now is the time to test the white – brown and white wires. The white wire is called the run wire. Take your multimeter and set it to ohms. Take the black multimeter standard test lead and touch the white wire with it.
What causes a fan motor to stop working?
One more thing before you start testing. The top cause of fan motor ‘breakdowns’ is a bad run capacitor. Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible.
Which wire is the run wire on a fan motor?
The white wire is called the run wire, the brown wire is called the start wire and the black wire is called the common wire. If your fan motor differs in any way to the configuration described here make sure to get the manual and check it for details.