Standard furnace components Flashcards
List different configurations of furnaces
Flow down for horizontal
Why is a thermostat better for controlling the furnace
It will turn on and off the furnace
Three operating controls on furnace
Transformer, gas valve, fan control
Three examples of safety controls
High limit rollout, flame sensor, thermocouple
Define thermocouple
To buy metals to create DC volts 30 to 20 V
How much should a flame be in a thermocouple tip?
3/8 to half inch
Two names of thermal piles
Power piles, pile generator
A combustion gas fill consist of many different currents. What are they?
Regulator different bolts, ignition capacities
What is normally used to detect temperature and temperature sensing devices
Bi metal temp sensing element
What are different categories of thermostats?
Mechanical
electronic
What’s the purpose of heat anticipator?
To make thermostat believe it’s at room temperature before it actually is
Electronic thermostats use what type of temperature sensor
Thermistor
List fan limits
Fan on 120 Fahrenheit to 140 Fahrenheit
Fan off 90-100
Fahrenheit
If the High limit control is open, what would it cut power to
Gas valve
Where are rollout switch is located
Above the burners power in the furnace in the cabinet high limit
