Advanced controls for HVAC

Controls can be _______________

• electrical

• mechanical

• electro-mechanical

• all answers are acceptable

A power consuming device.

• relay points

• SPST

• bulb

• limit

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-4

A power passing device

• motor

• xfmer

• spst

• bulb

A non-power consuming device

• overload

• run winding

• transformer

• relay coil

This connects to the voltage supply

• load side of a switch

• line side of a switch

• grounding lug

• control side of the thermostat

What color thermostat wire comes from 24v hot?

• red

• green

• white

• yellow

What color wire connects to the fan control of the thermostat?

• red

• green

• white

• yellow

What color wire connects to the heat control on the thermostat?

• red

• green

• white

• yellow

What color wire connects to the compressor contactor from the thermostat?

• red

• green

• white

• yellow

This can be thought of as a set of switches.

• compressor

• transformer

• thermostat

• IFR