Parts and Functions
In an electric furnace, what brings the elements on 1 at a time?
Sequencer
In an electric furnace, What is the fail safe safety called?
Fusible link
What are the ends of the motor called?
End bells
Capacitor
Gives extra power to start the motor
On the control board, what protects the low side voltage?
fuse
In an electric furnace, what type of flue pipe is used ?
None, it don't have a flu pipe
What is the part that chases the poles called?
Rotor
Pressure switch
Wont let the furnace turn on if there is obstruction
On a gas furnace, this makes sure theres no obstructions in the flu.
inducer motor
In a 90 plus gas furnace, at first sight, what is the first giveaway that its a 90 plus?
pvc pipe
What is the part that creates a magnetic field?
Stator
Flame roll out switch
Will shut the furnace down if flames come out of the box
What type of motor doesn't need a capacitor
dc motor or commutated
What inside the furnace makes it a 90 plus?
Secondary heat exchanger
What mechanism takes out the start windings?
Centrifugal switch
Heat anticipator
Fools the thermostat to shut off early so it doesn't overshoot in temperature
What is the 6th order in the sequence of operation?
Gas valve
In a gas furnace What is the 8th function in the sequence of operation?
Blower
Why don't they use the centrifugal switch in condenser motors?
Because they arc when disengaged
Cold anticipator
Tricks the system to come on earlier