term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
1. A call for heat is established
2. ?
2. The tstat senses a drop in room temp. And closes the R-W terminals
2. T-stat senses a drop in room temp. And closes R-W terminals
3. ?
3. Sends 24 volt ac power to a relay that starts and induced fan
3. R-W terminals close, which sends 24 volt power to a relay that starts the induced fan.
4. ?
4. Once induced fan is up to speed, a pressure switch ( sensing the air pressure in response to the fan) closes its contacts which allows power to flow to the ignition module
4. A pressure switch closes its contacts and allows power to flow to ignition module
5. ?
5. Once module is powered, it does a safe-start check to prove there is no false flame signal
6. ?
6. Off app is proved to be off, the module initiates ignition sequence, if app was on it is shut down
6. Upon successful completion of the safe-start check, the module initiates the ignition sequence
7. ?
7. The module closes switches that simultaneously energize the pilot gas valve and the spark generator, and flame sensor
7. Pilot gas valve, spark generator and flame sensor circuit are powered
8. ?
8. Pilot lights
9. ?
9. The sensor circuit senses the flame and turns spark generator circuit off
9. Once flame is proven, the spark generator circuit is turned off
10. ?
10. If flame sensor senses pilot flame, the module firing the main burner will energize the main gas valve, if the flame goes out system will be shut down
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!