SECTION 15975

DIRECT DIGITAL CONTROL SYSTEMS

PART 1 GENERAL

SECTION INCLUDES

Control equipment.

Software.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____ - __________]: Installation of direct digital control system equipment.

Section 15510 - Hydronic Piping: Installation of control valves, flow switches, temperature sensor sockets, gage taps, flow meters.

Section 15520 - Steam and Steam Condensate Piping: Installation of control valves, flow switches, temperature sensor sockets, gage taps, flow meters.

Section 15910 - Ductwork Accessories: Installation of automatic dampers, smoke detectors. Connection of damper end switches.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section [_____ - __________]: Central computer, printers, and terminals.

Section 15658 - Reciprocating Refrigerant Compressors: Connection of cylinder unloaders.

RELATED SECTIONS

Section [_____ - __________]: Building management system.

Section 15973 - Pneumatic Control Systems.

Section 15980 - Instrumentation: Thermometer sockets, gage taps.

Section 15985 - Sequence of Operation.

Section 16180 - Equipment Wiring Systems.

REFERENCES

ASHRAE 85 - Automatic Control Terminology for Heating, Ventilating, Air Conditioning.

ASME MC85.1 - Terminology for Automatic Control.

NEMA EMC1 - Energy Management Systems Definitions.

DEFINITIONS

Ensure terminology used in submittals conforms to

[ASHRAE 85.] [ASME MC85.1.] [NEMA EMC1.]

SYSTEM DESCRIPTION

Automatic temperature control field monitoring and control system using field programmable micro-processor based units[.] [with communications to Building Management System specified in Section [_____].]

Central and remote hardware, software, and interconnecting wire and conduit.

Terminal unit controls for variable air volume terminals, radiation, reheat coils, unit heaters, fan coils, pneumatic or electric unless indicated otherwise.

Damper Motors and Valve Operators: [Pneumatic.] [Electronic.]

SUBMITTALS

Submit under provisions of Section [01300.] [01340.]

Shop Drawings:

Trunk cable schematic showing programmable control unit locations, and trunk data conductors.

List of connected data points, including connected control unit and input device.

System graphics indicating monitored systems, data (connected and calculated) point addresses, and operator notations.

System configuration with peripheral devices, batteries, power supplies, diagrams, modems, and interconnections.

Descriptive data and sequence of operation of operating, user, and application software.

Product Data: Provide data for each system component and software module.

Samples: Submit [two] [_____] samples [___x___] inches ([___x___] mm) in size of each exposed control component illustrating [____________________].

Manufacturer's Installation Instructions: Include for all manufactured components.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [01720.]

Accurately record actual location of control components,

including panels, thermostats, and sensors.

Revise shop drawings to reflect actual installation and operating sequences.

Include data specified in "Submittals" in final "Record Documents" form.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700.] [01730.]

Include interconnection wiring diagrams complete field installed system with identified and numbered, system components and devices.

Include keyboard illustrations and step-by-step procedures indexed for each operator function.

Include inspection period, cleaning methods, cleaning materials recommended, and calibration tolerances.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

Installer: Company specializing in applying the work of this Section [with minimum [_____] years [documented] experience.] [approved by manufacturer.]

Design system software under direct supervision of a Professional Engineer experienced in design of this work and licensed [at the place where the Project is located.] [in the State of [____________________].]

PRE-INSTALLATION CONFERENCE

Convene a conference [one] [_____] week prior to commencing work of this Section, under provisions of Section [01200.] [01220.]

Require attendance of parties directly affecting the work of this Section.

Review [________________________________________.]

COORDINATION

Coordinate work under provisions of Section [01005.] [01040.] [01041.]

Ensure installation of components is complementary to installation of similar components in other systems.

Coordinate installation of system components with installation of mechanical systems equipment such as air handling units and air terminal units.

Ensure system is completed and commissioned.

WARRANTY

Provide [five] [_____] year warranty under provisions of Section [01700.] [01740.]

Warranty: Include coverage for [field programmable micro-processor based units.] [____________________.]

MAINTENANCE SERVICE

Furnish service and maintenance of energy management and control system for [one] [two] [_____] years.

Provide [two] [four] [_____] complete inspections [per year], one in each season, to inspect, calibrate, and adjust controls as required, and submit written reports.

****** [OR] ******

Provide complete service of systems, including call backs. Make minimum of [_____] complete normal inspections of approximately [_____] hours duration in addition to normal service calls to inspect, calibrate, and adjust controls, and submit written reports.

EXTRA MATERIALS

Submit maintenance materials under provisions of Section [01700.] [01750.]

Provide [two] [_____] of each type of exposed sensor under provisions of Section [01700.] [01750.]

PROTECTION OF SOFTWARE RIGHTS

Prior to delivery of software, the Owner and the party providing the software will enter into a software license agreement with provisions for the following:

Limiting use of software to equipment provided under these specifications.

Limiting copying.

Preserving confidentiality.

Prohibiting transfer to a third party.

[___________________________________.]

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Product [_____________.]

[______________________________] Product [_____________.]

[______________________________] Product [_____________.]

Substitutions: Under provisions of Section [01600.] [01630.]

LOCAL OPERATOR ACCESS AND DISPLAY PANEL

Provide local display and adjustment panel. Panels shall be [portable] [or] [integral to] programmable control unit. Panel contains a six character digital display, and a numerical keyboard. Display and adjust:

Input/output point information.

Controller set points.

Controller tuning constants.

Program execution times.

High and low limit values.

Limit differential.

Time, date, year.

Provide [two] [_____] auxiliary keyboard pushbuttons for custom programming special functions. Provide dedicated pushbuttons for manual/auto override, system test, and enter functions.

Provide status lights to annunciate controller test, trouble, alarm, auto control, override, and auxiliary button operation.

OPERATOR STATION

Operator Input/Output Devices:

Utilize ASCII (American Standard Code for Information Interchange) Code.

Interface with standard EIA (Electronic Industries Association) hardware through EIA RS-232-C communications port over telephone lines through a [1200] [_____] baud modem interface, or via dial-up network with auto-answer modems.

System loading shall be through [cassette tape.] [floppy disk.]

Communication between the central processing unit and programmable control units, and between programmable control units shall be normally 9600 baud, by block mode transmission with cyclical redundant error checking, supervised for system integrity and for monitoring field point status.

Station includes multiple input/output devices which can be used simultaneously, having on-line definable characteristics.

Provide Building Environmental Control Center consisting of video display terminal, hard copy printer, and audible alarm horn.

Printer:

Wide carriage with output of [ten] [twelve] [fifteen] characters per inch and 132 characters per line of paper, capable of using fan-fold paper.

Minimum operating speed of [120] [_____] characters per second.

Terminal:

300 mm diagonal display with adjustable tilt.

24 line, 80 character, [mono-chrome] [color] screen.

Automatic screen blanking after timed inactivity.

Low profile, detachable, keyboard having standard typewriter layout plus a 10 key numeric keypad, dedicated function keys.

CONTROL UNITS

Units: Modular in design and consisting of processor board with programmable RAM memory, local operator access and display panel, and integral interface equipment.

Battery Backup: For minimum of 100 hours for complete system including RAM without interruption, with automatic battery charger.

Provide the following functions:

Mathematical: Absolute value, calculate, square root, power, sign, average, totalize.

Logic: OR, AND, compare negate.

Fixed Formula: High and low select, span, rate, ramp, enthalpy, wet bulb, dewpoint, relative humidity, humidity ratio, filter.

Data Manipulation: Store, file and set.

Display Panel: Display adjust, override, time, day, date, year, alarm scan, override scan.

Control Routines: Proportional, integral, lead lag, hysteresis correction and incremental control.

Energy Management: Duty cycling, load shed, optimal run time, holiday and daylight savings time correction.

Provide self-test procedure for checking digital display and computer. Display advisories for maintenance, performance, or software problems. Identify variables as reliable or unreliable. Variables identified as unreliable will flash when displayed and calculation will use default.

Indicate alarms and deviations. Alarm scan shows alarms and identification. Continue alarm indication until acknowledged and alarm condition is corrected.

Provide two communication interface ports permitting communication between processor, process interface equipment, other processors, and central processing unit specified in Section [_____.]

DATA INTERFACE UNITS

Provide equipment required to connect all sensors, transducers and interface relays required to monitor and control equipment in sequence of operation.

Provide each data interface equipment module with minimum of [_____] binary and [_____] analog inputs, and [_____] binary and [_____] analog outputs.

INPUT/OUTPUT SENSORS

Temperature:

Resistance temperature detectors with resistance tolerance of plus or minus 0.1 percent at 21 degrees C, interchangeability less than plus or minus 0.2 percent C, time constant of 13 seconds maximum for fluids and 200 seconds maximum for air.

Measuring current maximum 5 MA with maximum self-heat of 0.017 degrees C/MW in fluids and 0.008 degrees C/MW in fluids and 0.008 degrees C/MW in air.

Provide 3 lead wires and shield for input bridge circuit.

Use insertion elements in ducts not affected by temperature stratification or smaller than one square meter. Use averaging elements where larger or prone to stratification sensor length 2.5 m or 5 m as required.

Insertion elements for liquids shall be with brass socket with minimum insertion length of 2-1/2 inches (60 mm).

Supply room sensors with locking cover[.] [matching the pneumatic thermostats used.]

Provide outside air sensors with watertight inlet fitting, shielded from direct rays of sun.

Humidity Sensors:

Elements: Accurate within 5 percent full range with linear output.

Room Sensors: With locking cover [matching pneumatic thermostats used], span of [10 to 60 percent relative humidity .] [30 to 80 percent relative humidity.]

Duct and Outside Air Sensors: With element guard and mounting plate, range of 0 - 100 percent relative humidity.

Static Pressure Sensors:

Undirectional with ranges not exceeding 150 percent of maximum expected input.

Temperature compensated with typical thermal error or 0.06 percent of full scale in temperature range of 40 to 100 degrees F (5 to 40 degrees C).

Accuracy: One percent of full scale with repeatability 0.3 percent.

Output: 0 - 5 vdc with power at 12 to 28 vdc.

Equipment Operation Sensors:

Status Inputs for Fans: Differential pressure switch with adjustable range of 0 to 5 inches wg (0 to 1250

Pa).

Status Inputs for Pumps: Differential pressure switch piped across pump with adjustable pressure differential range of 8 to 60 psi (50 to 400 kPa).

Status Inputs Where Differential Pressure Sensing is Impractical: Current sensitive relay with current transformers, adjustable and set to 175 percent of rated motor current.

Digital to Pneumatic Transducers: Convert [plus or minus 12 vdc pulse width modulation outputs] [continuous proportional current or voltage] to 0 to 20 psi (0 to 138 kPa).

Damper Position Indication: Potentiometer mounted in handbox enclosure with adjustable crankarm assembly connected to damper to transmit 0 - 100 percent damper travel.

Carbon Monoxide Detectors:

Single or multichannel dual level detectors, using solid state sensors with three year minimum life. Sensor replacement shall take maximum 15 minutes. Suitable over temperature range of 23 to 130 degrees F (-5 to 55 degrees C).

Provide individual indicators and contactors for each level, initially calibrated for 50 ppm and 100 ppm.

Maximum response time to 100 ppm CO calibration gas shall be two minutes.

OPERATING SYSTEM SOFTWARE

System Format:

Divide points of control or monitoring by system.

Identify points with unique, structured point identifier reflecting "specific area" or "specific system", and "specified point".

Input Process:

Select, from menu, one of four general types of commands based upon password clearance, command points, information points, build parameters, and modify parameters. Commands not available by password clearance shall be deleted from video display.

Enter memory changes through keyboard.

Select entry modes, Aid or Direct, based on operator's degree of capability and familiarity with system.

Aid Mode shall prompt operator through each step indicating available options.

Direct Mode shall allow experienced operator to input command string directly.

Enter commands as alpha/numeric character strings. Where commands require data for limits, setpoint, and time, enter value in same engineering units as controlled variable.

Operator input shall not inhibit alarm reporting. Echo input on associated output device, to either

execute or abort.

Operator Access Control: Restrict any operator commands through use of software password.

Information Access: Obtain point status information from any designated output device with access command. Point status consists of point identification, numerical value (analog points) and associated engineering units, and individual function label indicating that point is on or off or in Alarm Normal condition. Output includes date and time of execution.

Point Display: Video display includes status of single point or group of points with high and low limits (if applicable). Refresh display at least every 20 seconds.

Alarm summary includes status of points in Alarm condition.

Off-normal summary includes status of points in Off-Normal condition.

Alarm Reporting:

Alarm outputs contain descriptor, point identification, point data, engineering units, and date and time.

Print on line changeable message, up to [60] [_____] characters in length, for each alarm point specified, immediately.

Display alarm reports on video. Display multiple alarms in order of occurrence.

Inhibit reporting of associated analog and binary alarms upon HVAC system shutdown. Upon restart, inhibit alarm reporting for operator pre-determined time.

Operator specifies if alarm required acknowledgement.

Advisories:

Lockout summary which contains status of points in locked out condition.

Continuously interrogate system hardware and programmable control units for failure or tampering and report if operational or not operational.

Power failure detection, time and date.

System communication failure with operator device, field interface unit, point, programmable control unit.

Data Base Save/Restore:

Provide program which allows saving or restoring of operating data.

[Cassette tape] [Floppy disk] unit shall save or restore system operating data.

Data includes:

Analog limits and differentials

Start-stop times

Access/secure times

Lockout/unlock times

Setpoint values and adjustment times

Limits and differential values

Totalization points, limits, and current values

Alarm messages and their assignments

Load control program operational parameters

HVAC control program operational parameters

Power Failure Motor Restart: Provide program to restore systems to normal operating conditions following power outage, and to enforce emergency operating conditions during power outage. Automatically restart loads to correct operating condition if normal or emergency power is available.

BASIC OPERATING FEATURES

Binary Capabilities:

Monitor binary sensors, continuously storing present contact condition in memory.

Indicate if point is off-normal, in alarm, or off-line.

Program output points for Open/Closed, Test/Reset, Start/Stop.

Feedback Start/Stop points. Employ point unique, feedback delay timer to temporarily suppress alarm reporting after input to allow time for response.

Output advisory message if response is not as commanded.

Hold points in present operating condition if controls power failure occurs.

Analog Capabilities:

Measure, transduce, transmit and display analog values.

Express analog point values in proper engineering units, displaying with up to [seven] [six] significant digits.

Have sensor to readout accuracy of plus or minus [one degree F (0.56 degrees C).] [0.5 degrees F (0.28 degrees C).]

Use [English] [S.I. Metric] system of measurement.

Provide for operator designated ranges either linear, series of linear approximations, split ranges, or square root extractions of exponential functions.

Compare analog read to high and low limits and annunciate Alarm or Off-Normal condition.

Output alarm, including point identification current value and associated engineering units, high or low value, and time and date.

Automatically disable alarm reporting upon associated system shutdown. Allow sufficient time to return to normal operating conditions before allowing alarm reporting.

Provide limit and differential summary.

Analog Point Adjust:

Remotely adjust controller set points or dampers. Automatically adjust points based upon preselected time or value.

Employ feedback so that if point fails to respond, responds with wrong value, or drifts from set point value by plus or minus 2 percent, output alarm message. Employ feedback delay timer to temporarily suppress alarm reporting after input to allow time for response.

Hold points in present operating condition if controls power failure occurs.

Automatic Alarm Lockout: Automatically inhibit alarm reporting of analog and binary points upon associated system shutdown. Inhibit reporting for operator predetermined time, upon restart of HVAC systems.

LOAD CONTROL PROGRAMS

General:

Provide means to reduce electrical energy usage, using control algorithms designed for electrical energy control.

Apply algorithms to other energy sources, such as steam or natural gas.

Support [English] [S.I. Metric] units of measurement.

Demand Limiting:

Monitor total power consumption per power meter and shed associated loads automatically to reduce power consumption to an operator-presettable maximum demand level.

Use floating window type demand determination to monitor demand and compare to target value.

Automatically shed loads throughout the demand interval selecting loads with independently adjustable on and off time of between one and 255 minutes.

Output advisory if loads are not available to satisfy required shed amount, advise shed requirements[.] [and requiring operator acknowledgement.]

Operator commands:

Add/delete demand meter point.

Define load point.

Define load priority target.

Define control target.

Begin new billing period.

Lock/unlock program.

Activate/inactivate/restore load.

Request load control system control summary.

Request load control system load summary.

Load control system summary:

Demand interval

Current kW power and measured demand.

Projected load limit.

Total energy available from HVAC system

Maximum, average, and current expendable load.

Maximum, average and current deferrable load.

Demand limit status, target value, and recent

control action.

Duty cycle status, target value, and recent control action.

Covergence time.

Restore band width.

Load summary:

Load priority.

Expendable/deferrable load type.

Point type, ID, status.

Load rating.

Minimum off, maximum off, and minimum on times.

Duty Cycling:

Periodically turn selected loads off to evenly reduce power consumption to target value, selecting loads with independently adjustable on and off time of between one and 255 minutes.

Operator commands:

Define load point.

Define control target.

Activate/inactivate/restore load.

Request load control system load summary.

HVAC CONTROL PROGRAMS

General:

Support [English] [S.I. Metric] units of measurement.

Identify each HVAC Control system.

Optimal Run Time:

Control start-up and shutdown times of HVAC equipment for both heating and cooling.

Base on occupancy schedules, outside air temperature, seasonal requirements, and interior room mass temperature.

Start-up systems by using outside air temperature, room mass temperatures, and adaptive model prediction for how long building takes to warm up or cool down under different conditions.

Use outside air temperature to determine early shut down with ventilation override.

Analyze multiple building mass sensors to determine seasonal mode and worse case condition for each day.

Operator commands:

Define time schedule.

Add/delete fan status point.

Add/delete outside air temperature point.

Add/delete mass temperature point.

Define heating/cooling parameters.

Define mass sensor heating/cooling parameters.

Lock/unlock program.

Request optimal run time control summary.

Request optimal run time mass temperature summary.

Request HVAC point summary.

Request HVAC saving profile summary.

Control summary:

HVAC Control system begin/end status.

Optimal run time lock/unlock control status.

Heating/cooling mode status.

Optimal run time time schedule.

Start/stop times.

Selected mass temperature point ID.

Optimal run time system normal start times.

Occupancy and vacancy times.

Optimal run time system heating/cooling mode parameters.

Mass temperature summary:

Mass temperature point type and ID.

Desired and current mass temperature values.

Calculated warm-up/cool-down time for each mass temperature.

Heating/cooling season limits.

Break point temperature for cooling mode analysis.

Linear compensation factor for heating mode analysis.

HVAC point summary:

Control system identifier and status.

Fan status. point ID and status.

Outside air temperature point ID and status.

Mass temperature point ID and status.

Calculated optimal start and stop times.

Period start.

Supply Air Reset:

Monitor heating and cooling loads in building spaces, terminal reheat systems, both hot deck and cold deck temperatures on dual duct and multizone systems, single zone unit discharge temperatures.

Adjust discharge temperatures to most energy efficient levels satisfying measured load by:

Raising cooling temperatures to highest possible value.

Reducing heating temperatures to lowest possible level.

Operator commands:

Add/delete fan status point.

Lock/unlock program.

Request HVAC point summary.

Add/Delete discharge controller point.

Define discharge controller parameters.

Add/delete air flow rate.

Define space load and load parameters.

Request space load summary.

Control summary:

HVAC control system status (begin/end).

Supply air reset system status.

Optimal run time system status.

Heating and cooling loop.

High/low limits.

Deadband.

Response timer.

Reset times.

Space load summary:

HVAC system status.

Optimal run time status.

Heating/cooling loop status.

Space load point ID.

Current space load point value.

Control heat/cool limited.

Gain factor.

Calculated reset values.

Fan status point ID and status.

Control discharge temperature point ID and status.

Space load point ID and status.

Air flow rate point ID and status.

Enthalpy Switchover:

Calculate outside and return air enthalpies using measured temperature and relative humidity; determine energy expended and control outside and return air dampers.

Operator commands:

Add/delete fan status point.

Add/delete outside air temperature point.

Add/delete discharge controller point.

Define discharge controller parameters.

Add/delete return air temperature point.

Add/delete outside air dewpoint/humidity point.

Add/delete return air dewpoint/humidity point.

Add/delete damper switch.

Add/delete minimum outside air.

Add/delete atmospheric pressure.

Add/delete heating override switch.

Add/delete evaporative cooling switch.

Add/delete air flow rate.

Define enthalpy deadband.

Lock/unlock program.

Request control summary.

Request HVAC point summary.

Control summary:

HVAC control system begin/end status.

Enthalpy switchover optimal system status.

Optimal return time system status.

Current outside air enthalpy.

Calculated mixed air enthalpy.

Calculated cooling cool enthalpy using outside air.

Calculated cooling cool enthalpy using mixed air.

Calculated enthalpy difference.

Enthalpy switch.over deadband.

Status of damper mode switch.

CHILLER CONTROL PROGRAMS

Control function of condenser water reset, chilled water reset, and chiller sequencing. Support [English] [S.I. Metric] units of measurement.

Condenser Water Reset: Automatically reset controlled condenser water temperature using measured outside wet

bulb temperature and load being handled.

Chilled Water Reset: Automatically reset controlled chilled water temperature satisfying cooling coil requiring greatest cooling.

Chiller Sequencing: Determine which combination of chillers will most efficiently satisfy chilled water load, by cycling chillers, based on comparing load to switchover limits defined for each chiller.

PROGRAMMING APPLICATION FEATURES

Trend Point:

Sample up to [_____] points, real or computed, with each point capable of collecting [_____] samples at intervals specified in minutes, hours, days, or month.

Output trend logs as line graphs or bar graphs. Output graphic on terminal, with each point for line and bar graphs designated with a unique [pattern] [color], vertical scale either actual values or percent of range, and horizontal scale time base. Print trend logs up to 12 columns of one point/column.

Alarm Messages:

Allow definition of minimum of [_____] messages, each having minimum length of [_____] characters for each individual message.

Assign alarm messages to system messages including point's alarm condition, point's off-normal condition, totalized point's warning limit, hardware elements advisories.

Output assigned alarm with "message requiring acknowledgement".

Operator commands include define, modify, or delete; output summary listing current alarms and assignments; output summary defining assigned points.

Weekly Scheduling:

Automatically initiate equipment or system commands, based on preselected time schedule for points specified.

Provide program times for each day of week, per point, with [one] [_____] minute resolution.

Automatically generate alarm output for points not responding to command.

Provide for holidays, minimum of [366] [_____] consecutive holidays.

Operator commands:

System logs and summaries.

Start of stop point.

Lock or unlock control or alarm input.

Add, delete, or modify analog limits and differentials.

Adjust point operating position.

Change point operational mode.

Open or close point.

Enable/disable, lock/unlock, or execute interlock sequence or computation profile.

Begin or end point totalization.

Modify totalization values and limits.

Access or secure point.

Begin or end HVAC or load control system.

Modify load parameter.

Modify demand limiting and duty cycle targets.

Output summary: Listing of programmed function points, associated program times, and respective day of week programmed points by software groups or time of day.

Interlocking:

Permit events to occur, based on changing condition of one or more associated master points.

Binary contact, high/low limit of analog point or computed point shall be capable of being utilized as master. Same master may monitor or command multiple slaves.

Operator commands:

Define single master/multiple master interlock process.

Define logic interlock process.

Lock/unlock program.

Enable/disable interlock process.

Execute terminate interlock process.

Request interlock type summary.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Install electrical work in accordance with Section 16180. Electrical material and installation shall be in accordance with appropriate requirements of Division 16.

Provide with 120v AC, 15 amp dedicated emergency power circuit to each programmable control unit.

MANUFACTURER'S FIELD SERVICES

Prepare and start systems under provisions of Section [01600.] [01650.]

Start-up and commission systems.	Allow sufficient time for start-up and commissioning prior to placing control systems in permanent operation.

Provide service engineer to instruct Owner's representative in operation of systems plant and equipment for [3] [_____] day period.

Provide basic operator training for [_____] persons on data display, alarm and status descriptors, requesting data, execution of commands and request of logs. Include a minimum of 40 hours dedicated instructor time.

DEMONSTRATION

Provide systems demonstration under provisions of Section [01670.] [_____.]

Demonstrate complete and operating system to Owner.

INPUT/OUTPUT SCHEDULE

POINT_DESCRIPTION	POINT	POINT	POINT

Digital Input

Demand Meter (kw)

Auxiliary Contact

Switches

Switch Closing

Flow Switch

Optical

Current

Pressure

Digital Output

Control Relay

Solenoid

Contactor

Analog Input

Temperature Sensors

Outdoor Air Space

Pipe Supply

Pipe Return

Duct Supply

Duct Return

Duct Mixed Air

Stack Temperature

Humidity Sensors

Outdoor

Space

Duct

Pressure/Vacuum

Filter

Flow

Current

Liquid Level

Photocell

Alarm

****** [OR] ******

INPUT/OUTPUT SCHEDULE

POINT_DESCRIPTION	POINT	POINT	POINT

POINT_TYPE

Inputs

Temperature

Relative Humidity

Pressure

Flow

Level

Position

Energy

Power

Outputs

Status

Alarm

Pneumatic Position

Electronic Position

Set Point Adjust

Start/Stop

Off/Low/High

Software Features

PID Control (DDC)

High Limit

Low Limit

Run Time Totalization

Consumption Totalization

Program Start/Stop

Load Shed

Duty Cycle

Enthalpy Switchover

Optimal Run Time

Supply Air Reset

O.A. Interlock

O.A Temp. Reset

Free Cooling Mode

Warm-up Mode

Boiler Interlock

Chiller Sequencing

Energy Calculation

ALARM SCHEDULE

TYPE	DESCRIPTION

A1	High Limit

A2	Low Limit

A3	Run Time

A4	Maintenance

A5	Status

A6	Override

A7	Freeze

A8	Low Pressure

END OF SECTION