Simulates the HEAT and COOL ramp signal of a T7067 dual set point thermostat and the economizer low limit function|Consists of 2 potentiometers and a resistor assembly mounted in a test box|Provides a heat/cool ramp signal from less than 2 VDC (min) to 16.6 VDC (max)|Provides an Economizer low limit signal from 4 VDC (equivalent to 45 deg F at the C7046 discharge sensor) to 4.5 VDC (equivalent to 69 deg F)|Four test lead wires have color-coded bands with corresponding W973 terminal number|Lead wires have alligator clips for easy connection to W973 terminal|For vertical mounting on 2 x 4 in outlet box (at least 1 3/4 in deep)