This building has a dual system so if both chilled and heated water are circulating, the unit will use whatever is called for. If both loops are running it makes it harder to select the proper room temperature in winter. There is very little deadband in between the heat and cool setting. If the chilled water pump is off, the room temperature will stay more even in winter without introducing unnecessary cold air.

There are two types of control knobs for these units. One turns clockwise and the other turns counterclockwise. Take care to replace broken knobs with the proper type or change the label to indicate the proper direction for the desired change.

The filters should be examined and possibly cleaned twice a year.

If a cabinet is missing the front support for the filter a piece of aluminum angle can be cut to fit and inserted to support the filter.

If you place a thermometer in the path of the return airflow at the floor you are reading the temp or the coldest room air. This is where the internal thermostat reads as well 

To clean obsolete pencil off of the escutcheon, use Dawn on a paper towel.

Write in pencil with a mark the location of the dial. Write the temp and use a C for A/C cooling and a H for heat.