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Week 2 HVAC- Electrical Questions And Answers With Verified Solutions Latest Updated 2024
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Week 2 HVAC- Electrical Questions And Answers With Verified Solutions Latest Updated 2024
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Week 2 HVAC- Electrical Questions AndAnswers With Verified Solutions Latest
Updated 2024
Contactor (switch) - ANSWER✔✔ Energizes compressor and fan motor located in
the condenser.
Transformer - ANSWER✔✔ Transfers high voltage to low voltage (voltage
changer). Used for "control voltage". (Primary side = High Voltage / Secondary
Side = Low voltage)
Sequencer (switch) - ANSWER✔✔ Energizes the high voltage for the Heating
Element when producing heat in an electric air handler.
Blower (indoor) - ANSWER✔✔ Circulates indoor air for cooling or heating the
area.
Fan Relay (switch) - ANSWER✔✔ Energizes high voltage to the indoor blower
motor on a selected speed for cooling or heating mode.
Capacitor - ANSWER✔✔ Stores electrical energy and produces starting torque for
induction motors, producing a two-phase electrical flow.
Fan Motor (outdoor) - ANSWER✔✔ Transfers heat out of the refrigerant into the
outdoor air to enhance condensing process.
Thermal Limit & Fuse Link (switch) - ANSWER✔✔ Maintains the maximum
temperature a Heating Element can reach in the air handler (Limit/safety switch)
Thermostat (T-STAT) - ANSWER✔✔ Energizes cooling and heating mode for the
system by using low voltage to energize high voltage.
Breaker (switch) - ANSWER✔✔ Completes (energizes) the circuit from line
voltage (L1/L2) to the loads.
Heating Element - ANSWER✔✔ When energized by the sequencer (switch) it
produces heat in the electric air handler.
, Inverting - ANSWER✔✔ DC to AC
Rectifying - ANSWER✔✔ AC to DC
Alternating Current (AC) - ANSWER✔✔ Elections flow along a conductor first in
one direction, then in the other.
Ohm's Law - ANSWER✔✔ If resistance remains the same, If you increase your
voltage you increase your amps.
If your voltage goes down your amps goes down.
If voltage remains the same if your resistance goes up your amps goes down.
If your voltage remains the same, the resistances goes down your amps goes up.
Three phase motor - ANSWER✔✔ 230- low voltage 208- low voltage 460- high
voltage
3 phase motor wiring - ANSWER✔✔ On a three phase motor you wire on one of
the phases than connect to system.
Low voltage - ANSWER✔✔ Parallel wiring
High Voltage - ANSWER✔✔ Series wiring
(No Voltage) - ANSWER✔✔ If motor is 120v and it reads 78v the motor isn't
running.
voltmeter - ANSWER✔✔ EmF/Voltage
Ammeter - ANSWER✔✔ Current/Amps
ohmmeters - ANSWER✔✔ resistance/Ohms (turn off system when selected)
24 volts - ANSWER✔✔ Our control voltage. Low voltage circuits usually operate
at this.
R - ANSWER✔✔ Power
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