What is the difference between a contactor and a sequencer?
A sequencer uses low-voltage electrical energy to warp the bimetal inside it. It then passes power to devices that are in the high-voltage circuit. A contactor uses low-voltage electrical energy to magnetize the solenoid and then pass power to high-voltage devices.
How does a sequencer relay work?
Sequencers are basic relays that use a heater coil and a bimetal switch. Control voltage is applied to the heating coils which heats the bimetal switch. The heat causes the bimetal switch to flex, making contact across the switch and sending power to the elements.
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.
What causes a sequencer to fail?
Several issues can contribute to the failure of this part: Frequent use throughout the season causing flexing and straightening of the bimetal switch. Sequencers are basic relays that use a heater coil and a bimetal switch. Control voltage is applied to the heating coils which heats the bimetal switch.
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. What are two ways that manufacturers illustrate electrical circuits?
How many Btus is a 1200 watt heater?
4094 BTU
W 1200-Watt/600-Watt 4094 BTU Electric Wall Heater 240-Volt White.
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.
What is the advantage of a sequencer over a contactor?