List the operational sequence for Figure 39-24
What will be an ideal response?
With the system switch in the heat position, the heating thermostat closes when the room temperature drops. This initiates a call for heat, creating a path from the Red side of the transformer to the W terminal on the thermostat, through the limit and roll out switches to the ignition control on line 14. The ignition control energizes the draft fan relay coil (DRF line 14), closing the DFR contacts, which energize the draft fan motor (DFM line 3). The draft fan motor operates for 60 seconds Operation of the draft fan motor causes the draft pressure switch (DPS) to close line 13. The ignition control energizes the ignition relay coil (IR line 16), closing its contacts and energizing the igniter, line 1. The igniter is energized for 60 seconds before the gas valve is energized. The gas valve is energized and the flame rectification circuit looks for the presence of flame, line 12. If flame is sensed, the gas valve remains energized and the igniter is de-energized. The heating fan relay coil
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Identify the ways in which people use llamas
What will be an ideal response?
Why is the case of Catiline important?
a. The plot was a real danger to the state. b. It offered Cicero the opportunity to suppress the conspiracy, the greatest achievement of his career. c. The actions of Catiline and his followers were symptomatic of the troubles of the late Republic. d. It led the Senate to recall Sulla from retirement to suppress the conspiracy.
NOx readings at idle should be less than ________
A) 1 ppm B) 10 ppm C) 100 ppm D) None of these is correct
Which of the following is NOT a type of plastic piping?
A. CSST B. PVC C. CPVC D. ABS