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WorksheetsHeat pump
Total questions: 20
Worksheet time: 10mins
What does the 'O' terminal in a thermostat wiring diagram represent?
Outdoor sensor
Overload protection
Reversing valve in cooling mode
Operational mode selector
What does the color yellow in thermostat wiring indicate?
Common for 24 volt power
24 volt power
Compressor
Fan
What is the purpose of the 'E' terminal in thermostat wiring?
Energy saving mode
Evaporator fan
External unit control
Emergency heat
What does 18:8 thermostat wire signify?
18 volts and 8 amps capacity
18 gauge wire with 8 wires inside
18 meters long and 8 mm thick
18 wires inside and 8 gauge wire
What is the significance of having additional wires in thermostat wiring?
To replace faulty wires
To increase voltage capacity
For aesthetic purposes
For future upgrades
What does the 'B' terminal in a thermostat wiring diagram represent?
Blower control
Base temperature setting
Reversing valve in heating mode
Battery power
What does the color green in thermostat wiring indicate?
Emergency heat
Fan
Compressor
Reversing valve
What does the 'C' terminal in thermostat wiring represent?
Cooling mode
Circulation fan
Compressor control
Common for 24 volt power
What is the purpose of the 'AUX' terminal in thermostat wiring?
Airflow uniformity exchange
Auxiliary heat
Auxiliary power supply
Automatic unit exchange
What does the color red in thermostat wiring indicate?
Fan
Emergency heat
Compressor
24 volt power
What does the color blue in thermostat wiring indicate?
Common for 24 volt power
Condensation control
Cooling mode
Compressor
What does the color white in thermostat wiring typically indicate?
Emergency heat
Cooling mode
Fan
Common for 24 volt power
What does the color orange in thermostat wiring indicate?
Outdoor sensor
Operational mode selector
Resistance heating
Reversing valve
What is the purpose of the 'G' terminal in thermostat wiring?
Ground connection
Gas valve control
Geothermal heat pump control
Fan
What does the 'Y' terminal in thermostat wiring represent?
Yellow wire for compressor
Year-round control
Yield control
Youth mode
What component controls the flow of refrigerant in a heat pump system
Reversal valve
What is a comforting temperature for a 410a system on a 90 degree day
72 degrees Fahrenheit
65 degrees Fahrenheit
85 degrees Fahrenheit
55 degrees Fahrenheit
What does the 'W' terminal in thermostat wiring represent?
Water valve control
Wattage control
Heating control
Weather sensor
What role does the 'RH' terminal play in thermostat wiring?
Regulates humidity
Provides power for heating
Reverses the heat pump
Regulates refrigerant flow
What does the color black in thermostat wiring typically indicate?
Common for 24 volt power
Emergency heat
Cooling mode
Line for multi-stage heating and cooling
