DIVISION 1 - GENERAL REQUIREMENTS - IDEAS-EC

A. Install a pressure gauge adjacent to each pressure sensor, transmitter and pressure switch.3 .7 THERMOMETERSA. Install thermometers in piping as shown.3 .8 WIRINGA. Install wiring in conduit and in accordance with Section 16050.B. Support conduits in a neat and workmanlike manner. Prevent sagging or vibration.1. Run exposed conduits in equipment rooms parallel to or at right angles to the buildingstructure. Install exposed conduits to avoid conflicts with mechanical equipment, ducts,and piping.2. Conceal wiring in finished areas. Surface mounted wiring is not acceptable.C. Install 30-inches of flexible metal conduit for final connection to all well and duct sensors topermit sensor removal.3 .9 SEQUENCE OF OPERATIONA. Occupied - Unoccupied Mode:1. During occupied mode, outside air supply and exhaust fans operate continuously andoutside air dampers are open. Chilled water and hot water pumps operate continuously.2. During unoccupied cycle, exhaust fans are off and outside air dampers are closed. Outsidemakeup air handling unit AH-1 is off. Chiller and boiler operate same as in occupiedmode. Chilled water and hot water pumps cycle on and off under the control of the centralsetback thermostat.3. During unoccupied mode, bypass timers will allow the system to operate in occupied modefor up to 3 hours (adjustable).B. Chilled Water:1. One of the two chilled water pumps is manually selected to operate as lead pump.2. Above 65°F outside air temperature, lead chilled water pump starts.3. When chilled water flow switch makes, chiller is energized.4. Chiller operates to maintain 45°F supply water temperature.C. Hot Water:1. One of the two hot water pumps is manually selected to operate as lead pump.2. Below 60°F outside air temperature, lead hot water pump starts.3. When hot water pump flow switch makes, boiler is energized.15915-6ELECTRIC AND ELECTRONIC CONTROLS