Furnace Wiring

This terminal energizes the outdoor contactor.

• R

• W

• Y

• G

• C

This terminal supplies 24 volts to the thermostat.

• R

• W

• Y

• G

• C

This terminal initiates the heating sequence of operation.

• R

• W

• Y

• G

• C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

This terminal calls for blower operations and fan only in cooling mode.

• R

• W

• Y

• G

• C

Tags

NGSS.MS-PS3-3

This terminal provides a path for voltage to ground.

• R

• W

• Y

• G

• C

What tool is used to detect voltage in a circuit.

• multimeter

• manometer

• thermistor

• ohmmeter

A continuity test can be used to test the following:

• broken wires

• power to circuit

• grounded circuit

• wiring short

Tags

NGSS.MS-PS2-3

In your own words describe the path of current and the low voltage circuit during cooling operation.

Tags

NGSS.MS-PS2-3

Identify 3 hazards and protections for each, that would need to be thought about prior to the removal of this system?

Tags

NGSS.MS-ESS3-2

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What precautions would need to be taken in the removal of this system?

Tags

NGSS.MS-ETS1-1