Oil Burner CAD Cell Operation, Heating, 2025-2026 Manual D Test, Mechanical
Law Exam, Mechanical A/C Service Exam, Heating, Michigan Mechanical
Code 100% Correct
Primary Control
Controls oil burner operation in that it will not give flame and signal if conditions around
it are bad.
CAD Cell
Watches for light to recognize the ignition for an oil burner, with resistances under 1600
ohms.
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TT Terminals
Located on the rear side to connect to a signal that would ignite the oil burner when the
CAD cell criteria have been met.
Power Wires
White and black wires feed power supply into the primary control.
Electronic Transformer
Takes 120 volts from the primary control and sends 20,000 volts into the ignition.
Motor
Receives 120 volts from the primary control in order to pump and circulate air.
Solenoid
Stops fuel flow when power is removed and it cannot circulate oil without ignition.
,Resistance Value
Below 1600 ohms readings of CAD cell signal the primary control to turn on.
Multimeter
Device used to check resistance in CAD cell to ensure that it is working correctly.
Light Exposure
CAD cell resistance is affected by light exposure. The lower the reading the more light is
present.
Mega Ohms
CAD cell will read high resistance when exposed to light as part of normal operation.
Zero Ohms
Indicates faulty CAD cell. This reading should change depending on light exposure.
F Terminals
CFAD cell readings to identify if it is appropriate to turn the oil burner on.
Kiloohm
Unit of measure for electrical resistance, 1 kiloohm = 1000 ohms
Oil Primary Control
Device that monitors the CAD cell resistance detecting a flame
,Reset Button
Button used to reset an oil primary control system
Alligator Clip
Clip connected to multimeter for a resistance reading
Flame Resistance
Ideal CAD cell resistance range to detect a good flame, under 1600 ohms
Transformer
Device that changes voltage for the oil primary control system
120 Volts
Common voltage output for the oil primary control system
Frame Grounding
Ensures no electrical terminals come in contact with the system frame for safety
Electrodes
Pieces of the system that produce a spark for ignition in the oil burner system
70 degrees Fahrenheit is about the same
as how many degrees Celsius?
21
28 degrees Celsius is equilateral to ______ degrees Fahrenheit.
82
, On a low-pressure residential steam boiler, the relief device opens at?
15
If too much primary air is used the flame will __________?
lift off the burner
What operates the heat anticipator in a low voltage thermostat?
24 volts a/c
A limit control is located where in the electrical circuit?
either the 24 or 120- volt circuit
What is the usual oil pressure at the nozzle in a high pressure gun type oil burner?
100 psig
What license is required to perform a CSD-1 on An boiler that has an input rating of
1.7MBTU?
Mechanical Contractor Category 6
A psychrometer is a ________?
a hygrometer consisting of a wet-bulb and dry-bulb thermometer, the difference in the
two readings used to determine the atmospheric humidity.
A psychrometric chart is a ________?
chart where various property of air is plotted
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