Basic Wire Diagrams Flashcards
Schematic diagrams are also know as
Pictorial diagrams are also know as
Ladder type
Connection
Where can the limit control be wired into
Into the 24volt circuit connected to the gas valve or by having it wired into the 120 volt circuit that controls the Transformer
Difference between a schematic diagrams and pictorial
Schematic is a simplified diagram that shows symbols that represent the parts
Pictorial is a visual representation of physical location, shows components
What state are schematic diagrams shown
A de-energized state
Thermopile output voltage
250millvolt to 1000millvolt
Name the symbols in the picture, and component it makes up
Thermopile, gasvalve, door switch,limit switch, thermostat
What is the symbol in the picture? What are the symbols inside of it
Combination fan and limit control
Switch(summer switch)
Adjustable fan
High limit
What is this symbol
Humdistat
This portion of the circuit is what
Humidifier
Two types of anticipators where is it connected?
Fixed and adjustable
In the thermostat, need to set it for the amp draw of the circuit
Name this symbol
Adjustable fan control
How many volts in a millivolt
1000
What does a flow chart represent
Process of how equipment operates
Which side of schematic diagrams is “hot” and “neutral”
The left is hot and the right is neutral
What is this symbol, and what does it represent
A transformer and it stepping down 120v to 24v
What does this symbol represent
Field connections
What does this symbol represent
A solenoid, a gas valve in the furnace
What does this symbol represent
A thermocouple
Name these symbols on what position they are in
High limit control, N.C. opens on temp rise
Fan control, N.O. closes on the temp rise
Heating Tstat, N.O. closes on the temp fall
