$18,000 - $20,000. More than $20,000. The total amount spent per pupil by district in the 2011-12 school year by elementary and K-12 districts. The darker the color, the higher the spending.
b) Set a voltmeter to the 300 volts scale. Place test probes on terminals 1L and 3L (see diagram) of the high limit portion of the thermostat. The meter reading should be the input voltage of the heater (see rating plate of the water heater). If not correct voltage, check for loose connections and blown fuse or tripped circuit breaker. c) To verify that the high limit switch is closed, place test probes onto terminals 2L and 4L (see diagram).
Where ever a thermostat is required, communication and control wiring and in some cases an addition power circuit either a control voltage such as 24 volts or line voltage of 120 volts must be installed. Adding this power source may require the installation of a control transformer to convert 120 volts to 24 volts.n a VAV application, the VAV boxes (assuming these are not replaced) will need a new control module for the heating coils, dampers, and fans. There will also be the requirement to replace the temperature and air flow sensors for each box.