Springfield Technical Community College

ACADEMIC AFFAIRS

Course Number:	ENGY 220	Department:	Energy Systems Technology	
Course Title:	Combustion Control Circuits	Semester:	Spring	Year:	1997	

Objectives/Competencies

Course Objective	Competencies	
1.	Stack-mounted primary control.

2.	Cad cell primary control.

3.	Forced hot water control schematics.

4.	Hot water zoning schematics.

5.	Commercial cad cell control systems.

6.	Commercial cad cell control systems.

7.	Commercial primary controls.

8.	Gas trains/pressure switches.

9.	Flame rod sensing devices.

10.	Optical flame detectors.

11.	Photocell detector.

12.	Infrared detector.

13.	Ultraviolet detector.

14.	Honeywell 890F and Fireye M-series controls.

15.	Programming controls.

16.	Electro-mechanical programmers.

17.	Microcomputer controls.

18.	Industrial boiler wiring circuits.

	1.	Explain how to install control.
2.	Define temperature limits of control.
3.	Explain how to adjust ignition timing.
4.	Explain recycle feature of control.

1.	Explain operation of 3 and 4 wire control.
2.	Describe how control is wired to limit circuit.
3.	Explain reset procedure on electronic control.
4.	Explain reason for jumping T-T.

1.	Describe wiring of low limit and circulation control.
2.	Explain operation of high limit control.
3.	Explain function of 1k relay.

1.	Explain function of ZR and ZC terminals.
2.	Explain thermostat activation of burner/circulating pump.
3.	Explain zoning with relay and separate circulator.
4.	Explain zoning with zone valves.
5.	Operation of end switch and how a valve is driven open.

1.	Explain use of add-on timers.
2.	Explain use of solenoid valves.

1.	Explain how burner motor is activated using a contactor.

1.	Explain flame failure response time.
2.	Explain function of combustion air proving switch.
3.	Explain reason for pilot flame.
4.	Define direct spark ignition.
5.	Define pre-purge.

1.	Explain components in gas train.
2.	Explain operation of pressure switches.
3.	Explain operation of vent valves.
4.	Define low and high gas pressures.

1.	Define term rectification.
2.	Explain reason for rectification.
3.	Describe location of flame rod.

1.	List types of optical flame detectors.
2.	Describe difference from cad cell control.
3.	Describe advantages over sending controls.

1.	Describe type of fuel’s flame it will detect.
2.	Describe flame signal readings.
3.	Describe rectifying photocell.
4.	Explain use of filters and orifices.

1.	Explain type of flame it must see.
2.	Explain construction of cell.
3.	Explain flame signal readings.
4.	List types of flames it will detect.

1.	Describe glass used with UV detector.
2.	List types of flames it will detect.
3.	Describe mini and self-check UV detectors.

1.	List advantages owner cad cell control.
2.	List limitations of controls.
3.	Describe ignition trials.
4.	Describe re-light feature of control.

1.	List additional features over primary controls.
2.	Define ignition trials.
3.	List proper sequence of timed operations.
4.	Explain modulating control circuit.

1.	Describe operation of timer motor and contacts.
2.	Explain internal schematic of relays and contacts.
3.	Describe service of contacts.

1.	Describe inputs and outputs of control.
2.	Describe display features of control.
3.	Describe flame signal readings.

1.	Identify components in limit circuit.
2.	Identify components in pre-ignition interlock circuit.
3.	Identify components in lockout circuit.
4.	Identify components in modulation circuit.
5.	Identify components in blower motor circuit.
6.	Explain various types of pre-purge.
7.	Describe operation of modulating motor and control.