furnace sequence of operation

What is step 9 in the sequence

• Gas valve closes -gas flows to manifold

• Pressure switch closes

• Call for heat ends/satisfies

• Everything stops

The (a)   has to be closed before sequence can begin

What is step 13 in the sequence

• Call for heat

• Do a jumping jack

• Burners light

• Fan shuts off on time or temp

What is step one of the sequence

• Get up off couch

• Call for heat

• Flame rectification

• Burners light

What is step 10 of sequence

• Pressure switch closes

• Inducer starts

• Air conditioner turns on

• Gas valve opens-gas flow stops to manifold

What are these

(a)  

in step 2 of sequence, the (a)   has to start to go on to step 3

What happens in step 6 of sequence

• Fan starts on time or temp

• Burners light

• Limit circuit opens

• Heat comes out of register

In step 3 the __has to close to allow the energizing of __ to move onto step 5

(a)  

What is this

(a)