Emcs Software Specifications

This Appendix provides a sample of the descriptive portion of an EMCS software specification for a new construction junior high school in Connecticut. The school is constructed of red brick, has a pitched, well insulated roof and comprises 140,000 sq. ft. Entry ways are double doored. Windows comprise a moderate percentage of outside wall area and are of the double pane construction. The building is fully air conditioned. The HVAC systems consists of a central boiler/chiller plant and single duct distribution without static air pressure control. Equipment is as follows: 1) a bank of 10 modular oil fired hot water boilers controlled by the manufacturer's microprocessor controller that stages the units on as needed to maintain a temperature reset schedule as determined by the outside air temperature, 2) 2 two-stage reciprocating chillers connected in parallel, 3) a single cell cooling tower with a two speed fan, 4) one condenser water circulator, 5) a pair of space heating circulators to circulate hot water, 6) a pair of space cooling circulators to circulate chilled water, 7) 17 air handling units—10 of which contain a preheat coil, a supply air fan, an outside air damper and a return air damper supply air to terminal units—7 of the units which contain a cooling coil, a heating coil, a supply air fan, an outside air damper and a return air damper supply air directly to the space, 8) one makeup air unit with an outside air damper, 9) 100 space terminal units each containing a reheat coil, a chilled water coil and a damper, 10) an oil fired domestic service hot water heater and associated circulator to supply heat energy to a heat exchanger in the domestic service hot water storage tank, 11) one circulator to circulate domestic service hot water through the building, 12) 21 attic exhaust fans, 13) 14 cabinet unit heaters, and 14) 27 toilet exhaust fans all to be controlled by a distributive DDC EMCS with peer-to-peer communication. There are several exhaust fans for ventilating mechanical rooms, fume hoods, science rooms, the auditorium stage and storage rooms. These units are locally controlled on an as needed basis. Occupancy sensors perform space lighting control.

The reader should note that sequencing logic requirements are organized into three sections: 1) administrative, 2) system, and 3) operating.

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