B33.REV

DiDDC SYSTEM

NOTE: MASTER COPING DATE: -----, 1983

Part 1 -	GENERAL

1)	GENERAL

A.	Distributed Direct Digital control system to monitor and control mechanical, electrical, fire equipment as noted

1.	Completely modular, physically and electronically from system configuration standpoint

2.	Input, output devices.

3.	Intelligent Remote Data Collection Panels (IRDCP).

4.	Total systems immune from internally and externally generated sources of electrical noise: correct as directed without additional charge

5.	Note that in some cases, transmission cables will be ran with other communication cables from other sources. Shield all cables ran in this condition

6.	Complete DiDDCS to be listed, labeled, or approved by Underwriters Laboratories Inc. and/or Factory Mutual System for fire signaling and smoke control. Alternate techniques to be described in proposal

7.	Provide necessary interlock between the new IRDCP and the existing Fire Alarm System Via data trunk cable for critical information as described elsewhere under these specification. Provide all hardware and wiring

B.	Existing DiDDC system capable of:

1.	Receiving linear or non-linear analog signals, alarm and status-contacts.

2.	Performing on/off control functions in manual or time programmed mode of operation

3.	Performing proportional integral, and derivative positioning of control functions, as noted

4.	Performing special features as noted.

5.	Communicating with new IRDCP's.

6.	Supervising wiring as noted.

7.	Performing control functions as specified.

8.	Printing alarm conditions, trouble signals, change of status.

9.	Performing programmed functions, sequences as noted.

C.	System capacity:

NOTE: INSERT CAPACITY IN MULTIPLES OF 1500

1.	Data trunk cable capable of handling 3000 remote functions.

2.	System modular, to allow change of function and operation in field by plug-in module equipment, software change to expand system capacity on full on-line basis

D.	Performance. Minimum performance of system, sub-systems quality, operation of materials and equipment is intent of specifications, recognizing that manufacturers may produce same end result by diverse means. They describ operational functions of complete, integrated control system and present general requirements for hardware to accomplish functions, not intended to restrict Contractor to exact procedures; alternate procedures allowed, as approved with evidence that completed system equal or superior

E.	Abbreviations used are per General Provisions for DiDDCS.

2)	ENVIRONMENTAL CRITERIA FOR HARDWARE

OTED: DIDDCS CENTRAL HARDWEARE IS SPECIFIED FOR NFPA 72[D CHANGE FOR JOBS THAT DO NOT REQUIRED THIS LISTING

A.	Indoor hardware: 32 deg F to 120 deg F, 10 percent to 90 percent RH.

B.	Outdoor hardware: -30 deg F to 150 deg F, 0 percent to 100 percent RH

Part 2 -	PRODUCTS

1)	DATA COLLECTION HARDWARE

NOTE: DELETE IF N.A.

A.	System architecture:

NOTE: USE APPLICABLE PHRASE

1.	DiDDCS (shall be) hierarchial system consisting of a number of intelligent remote data collection panel (IRDCP)

2.	Number and distribution of IRDCP's described in shop drawings, and approved by authorized representative. Intelligent Remote Data Collection Panels (IRDCP) shall be grouped to cover areas for most efficient wiring arrangement. IRDCP's self-contained sub-systems to monitor, control and perform energy optimization tasks within their area.

3.	Existing HPU shall process information from IRDCP's and provide total system supervision. Existing host functions include communication management and trouble-shooting advisory

4.	Devices connected to IRDCP's at which information digitized, encoded, multiplexed for transmission to existing HPU's via Data Trunk Cable (DTC). No transmission in analog form on DTC. DTC provided between existing HPU and IRDCP's. DTC shall be provided between hospital west new IRDCP and existing IRDCP located in the link level 0 fan room

5.	Remote Data Collection Panels (RDCP) may provide for monitoring, alarm and global applications only. All temperature control panels shall be intelligent IRDCP's

NOTE: INSERT APPLICABLE NO.

B.	Redundancy requirements:

1.	Increased reliability of the fire related portion of the DIDDCs is the intent of this specification. This intent shall be met as follows

a.	Redundancy Methodology: a distributed control approach shall be utilized, Fire related IRDCPs which are intelligent via an existing computer logic must perform all automatic fire related functions as noted elsewhere in this paragraph without having communication with or independently of the SPU or the HPU. No IRDCP may contain more than 100 remote functions. Each IRDCP must automatically actuate 2 separate sets of contacts: one for any fire related alarm and one for trouble and/or a supervisory condition. These contacts shall be hardwired to an existing Class B supervised annunciator panel located in the Fire Management Console Room at the physical plant. There shall be individual indication lights for each fire related IRDCP. The contacts shall be wired such that the IRDCP common trouble contact signals "annunciator supervisor trouble" on its respective alarm circuit. .t 3 Reliability. Provide maximum system and signal reliabilia arm circuit

2.	Line supervision of DTC.

3.	Transmission word format immune to line noise, electrical interference.

4.	Automatic restart after power outage and restoration.

5.	Battery backup for volatile memory and system clock to insure data retention as noted

6.	Error checking bits in message format.

7.	Automatic error analysis to insure against nuisance alarms.

8.	Tamper detection in form of annunciation if printed circuits are removed.

9.	Description of quality assurance procedures in shop drawings for approval by authorized representative

10.	Data handling and transmission equipment: solid state.

11.	Data transmission: digital type only.

12.	Non-interference of simultaneous events in multiplexed transmission.

13.	Signal analysis: detail in shop drawings an analysis of modulation signal transmission characteristics. Include

a.	Description of binary encoding techniques for characterization of resulting signals as functions of time. Determine relationships between signal-to-noise ratio, probability of error, signal levels, scanning rates

b.	Description and analysis of shielding techniques, noise environment assumptions

c.	Description and analysis of effects of signal distortion by multiplexing cable, if applicable

14.	Data transmitted between existing DiDDCS processing units and IRDCP transmitted in digital form. Double transmission, echo transmission or multiparity bit technique or equivalent error detection method used to insure message integrity. Transmission system failure annunciated immediately as "N Response" with display and/or printout of time, address of area failing to respond. Provide hourly log of remote groups not responding

15.	Analog signals converted to digital values within 200 ft of sensing point or transmitted by 4-20 ma signal. Provide same reliability measures stated for digital signal transmission to converted analog signals; double transmission, echo transmission or accuracy check

C.	Line supervision:

1.	Lines from IRDCP to detecting elements supervised using current, voltage, or frequency sensing techniques. 10 percent change to initiate alarm signal

NOTE: CONSULT NFPA 72D TABLES 3-9.1 AND TABLES 3-10.1 FOR PROPER SELECTION

2.	Performance and capacities of initiating device circuits (IDC)

NOTE: TWO WIRE OR FOUR WIRE

a.	Two (2) wire.

(1)	Style A as per NFPA 72D table 3-9.1.

3.	Performance and capacities of signaling line circuits (SLC).

a.	Style (7) as per NFPA 72D table 3-10.1.

4.	Communication channel:

NOTE: USE FOR CAMPUS TYPE SYSTEMS ONLY. REFER TO NFPA 71 (1982) PAGE 39 TABLE "A" FOR PROPER SELECTION

a.	Type 1.

NOTE: APPROVAL

D.	Intelligent Remote Data Collection Panel (IRDCP):

1.	IRDCP: Hardware shall be microprocessor-based processor(s), with microprocessor-based input/output (I/O) modules interfacing controller(s) to sensors and output devices; PROM or RAM memory. Where RAM memory is provided memory shall be protected via battery backup for a minimum of 24 hours. Controllers shall have memory error checking. Upon detection of a memory error, controller processor shall correct error or halt to prevent erroneous operation

2.	IRDCP status or output indication: Controllers shall display indication provisions for ease of maintenance

3.	IRDCP output: Controller analog outputs shall be a proportional electrical or a proportional pneumatic signal via an E to P transducer. Controller digital, two position signals may operate positioning device directly or have an interposing relay to give proper signal level

4.	IRDCP located in mechanical rooms or areas as noted. Locations and dimensions submitted for review prior to placement. Contractor may elect to use his single standard IRDCP, or his multiple standard IRDCP as determined by most economical installation. Where multipl IRDCP used at one location, they may be considered single for intercommunication purposes. Physically, IRDCP lockable, rigid

5.	Factory prewired panel with terminal strips for connection to field sensors, contacts, control devices

6.	IRDCP shall convert information to digital form for transmission.

7.	Slots for plug-in printed circuit point modules.

8.	Modular control and communication link chassis with integral power supply

9.	Pedestal base floor mounted or wall mounted metal cabinet.

10.	Full front hinged door.

11.	Locking handle with master key.

12.	Non-glare baked enamel finish; color: manufacturer's standard, as approved

NOTE: OMIT IF NA

13.	DiDDCS service intercom in face of panel.

14.	Power supply for remote functions as required.

15.	Rechargeable dry type battery back-up for complete IRDCP Fire and Smoke Control functions. Orderly shut-down and start-up. Battery: as per NFPA 72D. Automatic switchover and recharging

E.	Logic Card Design Features:

1.	Key cards to prevent reversal.

2.	Identify each card with its part number denoting card type, card rack and connector position

3.	Plug-in circuit card modules: position in vertical plane.

4.	Utilize bussed power distribution system designed for use with logic modules

F.	Data Trunk Cable:

1.	Shielded jacketed cable.

2.	Coaxial or twisted pair.

3.	In accordance with DiDDCS manufacturer's recommendations. Describe in shop drawings

NOTE: ON LARGE SYSTEMS ONLY

NOTE: ON LARGE SYSTEMS ONLY

NOTE: DELETE IF N.A.

G.	DiDDCS Service Intercom:

1.	Provide voice communication system between existing consoles and each new IRDCP (or local control panel) by talk-listen stations. Console control features

a.	Point or system address of intercom's similar to data logging point selection

b.	Call select, call cancel, push to talk push buttons.

c.	Intercom volume adjustment.

d.	Call in from remote.

e.	"all call" feature.

2)	FUNCTION IDENTIFICATION

A.	Provide consistent Function Identification code to command, report information on existing CRT Terminals and Printers

B.	Consecutive numerical system not acceptable. Simplified translation of code and instruction mnemonics shall be provided at existing CRT terminal. Shop drawings describing code: for approval, following levels of code required

1.	Building name and number.

2.	Building subdivision.

3.	Building floor and room location.

4.	System type: ie: air handler, utilities.

5.	Sub-system: ie: Supply Air, Chilled Water.

6.	Point: ie.,: supply fan.

3)	SYSTEM COMMUNICATIONS

A.	Priorities:

1.	System shall observe following priorities:

a.	Change of state alarm.

b.	Out of limit alarm.

c.	Operate request or command.

d.	Automatic log.

e.	Maintenance alarm.

f.	Advisory message.

B.	Response Time:

1.	Time between occurrence of alarm or status change, its display or printout shall not exceed following times irrespective of other system or operator functions

a.	Electrical, Mechanical: Critical - four seconds.

b.	Electrical, Mechanical: Maintenance - 15 seconds.

2.	In event of simultaneous alarm conditions, print at rate not slower than one per 10 seconds without loss of any alarm signal

C.	Response to Operator Commands or Requests:

1.	Following response times must be achieved subject to previously mentioned response times and priorities at console

a.	Start/stop-15 seconds.

b.	Mode change-15 seconds.

c.	CPA-25 seconds.

d.	Initiation of log-20 seconds.

e.	Summary request-20 seconds.

f.	Program parameter change-60 seconds.

g.	Graphic selection-10 seconds.

4)	SOFTWARE

A.	General:

1.	DiDDCS contractor shall supply fully documented software packages to meet operating requirements and match hardware characteristics to include

a.	IRDCP software.

2.	Programming organized into discrete tasks for installation, maintenance expansion. Document which tasks are performed during installation, off line a factory computer facility, or field programmed while system is operating. Provide details of memory usage, allocation, size of programs for host and satellite processors

3.	Provide for future point expansion capacity as approved and noted.

NOTE: DO NOT USE UNLESS SPECIFICALLY REQUESTED BY OWNER

B.	IRDCP application programs:

1.	General:

a.	These application programs separately described and detailed in shop drawing submittals. Description shall include

(1)	Detailed description of how Contractor's program meets application program specified

(2)	Detailed, complete macro flow chart of program.

(3)	List of remote points utilized for each program.

(4)	History of development and past use, if any, of program.

(5)	Explanation of how each parameter value in program is determined; i.e., measurement, "look-up table," mathematical approximations to empirical curves, internal computation in program

b.	Intent: Provide operable programs. Where references to monitored, controlled, remote, or central operator functions are made in program description, are required for program operation, they shall be provided whether or not they are listed in function schedule or mentioned elsewhere in specification. Includes hardware and software

c.	IRDCP software shall include complete operating system, energy management application packages as standard control algorithm application packages, and an owner/user custom control and calculation application packag complete with interpreter

2.	The IRDCP operating system: software shall be IRDCP resident and operate independently of central computer; control communications between operators terminal, controllers and I/O modules, accept analog and digital inputs, produce analog and digital outputs, provide alarm monitoring, control application packages, and interface necessary sensor and actuator types; contain built-in diagnostic routines as noted; sealing and calibration pof sensor lead length variations to insure instrumentation accuracies; automatic restart of equipment based on current program time without operator intervention. Provide a system advisory loss of communication between I/O microprocessor and the existing central microprocessor; I/O microprocessor failure shall provide a means for local or remote alarm and/or override of selected output functions

3.	IRDCP application software: Provide as integral part of each IRDCP shall not be dependent on higher level computer for operation. Consisting of discreet programs, in any combination, in coordination with control sequences. Provide Proportional Control, Proportional plus Integral (PI) Control, Proportional plus Integral plus Derivative (PID) Control, Time Proportioning Control and Floating Control algorithms in memory and available for use by user analog output of Proportiona control, PI Control and PID control shall continuously be updated and output by program. Between cycles analog output shall retain its last value. IRDCP application software shall be resident and callable through programmers terminal; parameters shall be modifiable through the terminal at appropriate programming level with proper password

4.	Scheduled start/stop program (time of day) programs: An independent start and stop program time shall be provided for each system as noted. Assign independent start and stop times to equipment connected to a controller. Outputs: program start/stop command signals to air handling, heating or cooling systems

5.	Optimum start/stop program: Provide for each piece of equipment or system, as noted. Program to minimize total energy consumption during daily start-up of each heating/cooling system; by calculating a start time for each heating/cooling system which shall bring its respective zone temperature to boundary of comfort zone at the time of occupancy start; control auxiliary devices (i.e. dampers) as noted, to minimize energy consumption during the start-up period. Provide variable algorithm factors (multipliers) to allow program to be "fine tuned" to match builidng's response

a.	Inputs to program shall be space and outside air dry bulb temperatures, outside air dewpoint temperature, "occupied" or "unoccupied" status indicatio of building or zone, and an indication of a standard or extended shutdown period. Separate multipliers shall be entered for summer and winter. Program outputs start commands to air handling, heating, or cooling systems; and morning warm up and cool down damper control. Continuously monitor the space temperature and outside air temperature of each system specified to be under optimized start control. Control algorithm shall start system at latest possible moment as necessary to warm space or, in summer, to cool the space down prior to scheduled occupancy range: field programmable. Selectio of warm up or cool down in to be accomplished automatically by program. Execute a maximum of one optimum start command per day for each point controlled from program. Optimum start program shall interface with enthalpy program as follows

b.	Equipment shall be started. If enthalpy program shows outdoor air as a valid cooling source, outdoor air shall be used for pre-cooling. Otherwise, enthalpy program shall fully close OA dampers

c.	Program shall provide a minimum ventilation "on" state when two conditions are both satisfied

(1)	Occupancy start time has been reached, and space temperature has reached comfort zone (or, if one hour has passed without reaching comfort)

d.	Initial set-up of program by contractor's empirical, or theoretical, calculations considering building construction, orientation, and mass; job sit tuning by simple keyboard entry of multiplier to empirical formula results.

e.	Optimum stop: provide an independent optimum stop program for each system noted to minimize total energy consumption during daily shutdown of eac heating/cooling system; by shutting down system as much before end of occupancy as possible, but not so early as to let temperature drift out of specified comfort range

f.	Program inputs space and outside air dry bulb temperatures, and "occupied" or "unoccupied" status indication for the building or zone, and maximum shutdown advance. Program outputs are stop commands to air handling, heating, or cooling systems

g.	Program shall continuously monitor space temperature and outside air temperature of each system under optimum stop control. If space temperature is at full load end of comfort range, the system shall be shut down at programmed"end of occupancy" time. If space temperature is somewhere within comfort range, shutdown time will be advanced. To prevent occurrence of stuffiness adn occupant discomfort due to inadequate ventilation for an extended period, program shall accept a programmed limit of earliest practical stop time

h.	Optimum stop program shall use space temperature and drift rate to calculate lead time for shutdown

6.	Economizer control program: An independent program for each system as noted. Provide a means to control building cooling cost more efficiently b reducing amount of mechanical cooling required by using airstream having lowest temperature

a.	Program inputs outdoor and return air dry bulb temperature, and discharge air dry bulb temperature

b.	Outputs: main damper control economizer program shall compare outdoor air and return air temperatures and select either minimum outdoor air or local control to provide an air mixture with lowest temperature to cooling coils

7.	Load reset:

a.	Provide for each system as noted; to control heating and/or cooling to minimize energy use in building. Reset heating and cooling supply temperatur only to values necessary to maintain comfort conditions

b.	Inputs to the program are highest and lowest space temperature and space humidity. Program heating and cooling control and heating and cooling setpoints

c.	The load reset program:

(1)	Heating.

(2)	Cooling.

(3)	Heating and cooling.

d.	For heating reset when the lowest zone temperature is below low comfort limit, shall be turned on and heating setpoint reset. If lowest zone temperature is above low comfort limit, the heating shall be turned off. For cooling reset when highest zone temperature is higher than high comfort limit, cooling be turned on and cooling setpoint reset. If high zone temperature i less than high comfort limit, cooling be turned off. If both heating and cooling reset are selected, both heating and cooling can be on if required

8.	Duty cycle program:

a.	Conserve electric energy (KHh) by cycling fan systems on and off that do not need to be left running continuously during normal occupied periods. By calculating off periods allowable to maintain space temperature in a specified comfort range, and translating this to on and off times.

b.	Program inputs: fan status, space high dry bulb temperature, space low dry bulb temperature, maximum off percent, minimum off percent, and minimum of time. Program outputs fan control

c.	During occupancy program shall calculate off period, convert this to times for ON and OFF operation, and change fan ON-OFF state at proper time. Two-speed fans shall be reduced from fast to slow speed and then returned to fast speed

d.	Program shall store high and low space temperature when fan is shut off and shall calculate high and low temperature drift rates when fan is turned on also calculate off period based on relationship between space temperature and comfort range specified. Lowest space temperature indicates heating need and is compared to low comfort limit. A low comfort llimit shall allow no off time, and a midcomfort imit shall allow maximum off. A field programmed, fixed minimum off shall prevent unreasonably short off times. Program shall calculate cooling off period using highest space temperature and high comfort limit. For heating and cooling, shorter of off times shall be usde. For heating only or cooling only, either heating or cooling off time shall be used

e.	Start of occupancy shall be start time of duty cycle program.

(1)	The fan shall cycle no faster than allowable number of starts per hour for motor controlled

(2)	Fan shall not cycle so slow that a 25 to 30 percent off time cannot be achieved under light load with a maximum off time

(3)	Maximum off time percent shall give adequate ventilation.

(4)	Minimum off time shall be as required, by motor manufacturer.

5)	FIELD I/O HARDWARE

NOTE: DELETE NON-APPLICABLE DEVICES

A.	General:

1.	Where performance specifications exceed capabilities of hardware specified, performance governs, instrumentation shall be provided

2.	Provide sensing elements for DiDDCS.

3.	Distance from analog output sensors to IRDCP not to exceed 200 ft. For greater runs signal converted to digital signal output or 4-20 ma current output

4.	Accuracy, full scale, or as noted, overall, from sensed parameter to digital readout

5.	Sensing devices on existing systems may be reused provided that contractor guarantees their performance with regard to life, specified accuracy sensing and control method as if new

6.	Duct mounted item: devices mounted to sheet metal air ducts supported to ducts by self tapping screws, not less than two. Sensing elements exposed to air stream. Attachments to air ducts having exterior insulation provided with standoff spacers of plastic materials with insulating material firmly fitted around spacers, sensing element to leave minimum of exposed duct

B.	Liquid Temperature: Accuracy +/- 0.5 F water temperature. Flange mounted threaded stainless steel wells. Extension neck type for insulated work

C.	Duct Temperature: Accuracy: +/- 1.0 F air temperature. Factory calibrated type

D.	Duct humidity: Dewpoint sensor of accuracy +/- 2 F over a range of 0 to 150 F

1.	Provide two primary fuses for each potential transformer.

E.	Flow Proving Devices (Switches):

1.	Provide differential air pressure switch, sampling probe for air flow proof of operation for fans

2.	Provide differential pressure switch for proof of operation of filters.

3.	Diaphragm operated snap switch.

4.	Adjustable trip point.

5.	Paddle type not permitted.

F.	Start/Stop Interface: maintained or momentary electrical relay with suitable rated isolated contacts for start/stop of devices as scheduled

G.	Set Point Adjust Convertor:

1.	Electric to pneumatic converter module to modulate pressure to control point adjust (CPA) input of local standalone pneumatic controller where applicable

2.	Resolution 0.5 percent.

3.	Operating range 3 to 15 psi.

H.	Fire Management System.

1.	General:

a.	System shall operate as low voltage supervised general evacuation fire alarm system.

b.	System listed, labeled, or approved by Underwriters Laboratories Inc. and/or Factory Mutual System. System shall comply with applicable provisions of following NFPA Standards for local building codes, meet requirements of local authorities having jurisdiction

NOTE: DELETE IF N.A.

(1)	NFPA 71, NFPA 72C, 72D, 72E remote station Protective Signaling System

(2)	NFPA 90A Air Conditioning and Ventilating Systems.

(3)	Wiring in accordance with article 760 of National Electric Code (NFPA 70) and local electrical codes

(4)	USBC and all local codes.

2.	Bracket mounted detectors; extension for mounting surface mounted detectors in hung ceiling locations in front of return air openings. Detector and brackets suitably secured; installed to allow proper air flow for detection

3.	Semi-recessed or flush mounted detector: Minimize visibility of detector portion; no larger than 6 in. in diameter and protrude no more than 1-5/8 in. from ceiling line. Detectors mounted so ceiling type or architectural ceiling detail have no effect on operation

4.	Detectors zoned as follows unless noted:

a.	Duct detectors: Unit mounted per detector; floor return air duct detectors shall be by zones, each detector shall have a discernible remote alarm light below each detector with identifiable nomenclature for area served, submit for approval

5.	Door holder with intergral smoke detector operation:

a.	Door holders with integral smoke detector provided under the architectural door hardware

b.	Door holder with integral smoke detectors shall be connected to IRDCP for zone annunciation and release from the existing Fire Command Station

6.	Fire Alarm Control Unit:

a.	RDCP Mount: Control equipment mounted integral to RDCP's on plug-in printed circuit cards

(1)	Solid state modular design.

(2)	Integral static protection.

(3)	Light emitting diodes (LEDS) for indicating lamps.

(4)	Power supply for control unit and smoke detectors.

(5)	Provide supervised indicating loop circuits for polarized alarm signaling devices

(6)	Common trouble, common alarm, output.

(7)	AC power "on" indication.

(8)	Individual supervisory LED indication for:

(a)	AC power failure.

(b)	Ground fault detection.

(c)	Municipal trip disconnect.

(d)	Low battery.

(9)	Controls for:

(a)	System reset (momentary).

(b)	Silence (momentary).

(c)	Alarm lamp test.

(d)	Municipal disconnect.

(e)	AC power failure silence.

(f)	Battery.

(10)	Supervised initiating circuits with trouble and alarm LED for each zone

(11)	Auxiliary outputs for each zone as noted.

NOTE: CONSULT NFPA 72D TABLES 3-9.1 AND TABLE 3-10.1 FOR PROPER SELECTIO

(12)	Initiaing device circuits (IDC).

NOTE: TWO WIRE OR FOUR WIRE.

(a)	[TWO (2) WIRE.

(A)	[STYLE [A AS PER <NFPA 72D table 3-9.1.

(13)	Signaling line circuits (SLC).

(a)	Style (7) as per NFPA 72D table 3-10.1.

(14)	"Low" battery LED indicator.

(15)	Ground detection LED indicator.

(16)	Test switch for alarm LEDS.

(17)	Controls, indicators, enclosure behind key locked doors, windows to prevent tampering

(18)	Surface mounted enclosure.

NOTE: DELETE IF N.A. COORDINATE WITH HVAC FOR VENTILATION AND LOCATION. COORDINATE WITH ELECTRICAL FOR POWER FEEDERS AND/OR BRANCH CIRCUITS. CHECK I HYDROGEN DETECTOR IS REQUIRED

b.	AC power from Emergency Power bus.

c.	Standby batteries in RDCP's, existing, capable of operating fire alarm system for minimum of 4 hours, then operating indicating units for at least five minutes.

NOTE: DELETE IN N.A.

7.	Manual Pull Stations: Existing.

NOTE: FOR NEW YORK CITY LEAVE STRIPE IN SPECIFICATION.

a.	Painted red.

b.	Rugged die cast construction.

c.	Semi-flush mounting.

d.	Break-glass design; must be key opened to be reset.

e.	Not possible to close station without resetting.

f.	For test, initiate alarm without breaking glass.

g.	Furnish with spare glass rod.

h.	Include auxiliary contacts to DiDDCS as noted.

i.	Alarm contacts: gold plated, dry rated for 1 ma at 5 vdc minimum.

8.	Space Ionization Smoke Detectors: Provide space ionization smoke detectors as noted

a.	Low voltage, dual chamber, ceiling mounted, ionization type, factory adjusted

b.	Factory calibrated, adjusted to sensitivity for Underwriters Laboratories standards

c.	Self compensated for ambient temperature, humidity, atmospheric pressure. Field adjustment of sensitivity not required to compensate for above

d.	Provide for field sensitivity adjustment to suit unusual conditions. If field adjusted, full documentation provided for each detector shall include: detector serial number, detector location, calibration procedure, date performed, sensitivity procedure, date performed. Listing of each adjustable device on detector and its setting upon completion of calibration, sensitivity adjustments. Each field adjusted detector shall have a permanently attached unique model and serial number to facilitate future replacements and recalibration/sensitivity adjustments. Documentation to be included in the techaical manual

e.	Provisions to deter unauthorized removal.

f.	Integral, visual alarm indication, 300 degree field of view.

g.	With remote external indication integral indicator shall remain active.

h.	Auxiliary contacts for local interlock and to AMCS as noted; minimum two sets, SPDT, integral or remote mounted

i.	Provisions for remote reset.

j.	Standard 4x4 or octagonal electric box mounted.

k.	Prewired plug-in connector.

9.	Space Photoelectric Smoke Detector:

a.	Low voltage LED light source.

b.	Multiple cell concept: LED intensity controlled by regulating photo cell circuit matched to smoke detection circuit

c.	Light refractory principle: rate compensation to increase detection sensitivity upon rapid build-up of smoke

d.	Alarm condition: smoke reaches 1.5 percent obscuration.

e.	Integral thermal elements; alarm at 135 deg F.

f.	Integral visual alarm, 180 degree field of view.

g.	Auxiliary contacts, minimum two sets SPDT.

h.	Standard 4x4 or octagonal electric box mounted.

i.	Pre-wired plug-in connector.

10.	Duct Ionization Smoke Detectors: provide duct ionization smoke detectors as noted

a.	Air sampling tubes to detect products of combustion in air handling system ducts; span entire width of duct

b.	Direct mounted; or remote as indicated.

c.	Indicator lights; power "on", alarm.

d.	Test-reset switch.

e.	Meet NFPA 90A requirements.

f.	Auxiliary contacts for local interlock and to DiDDCS as noted; minimum two sets SPDT

g.	Provide minimum of one detector and sampling tube for each 15,000 cfm of system air flow or as noted

11.	Fire alarm horn with flashing light (Audio/Visual horns).

a.	High intensity flashing light and horn.

b.	Integrated unit.

c.	Both components 24V DC polarized.

d.	Light protected by Lexan Lens, stenciled with "Fire".

e.	Light to flash at the rate of two flashes per second.

f.	Minimum sound output at 95 DB or greater.

g.	Single or dual projections as noted.

12.	Fire alarm horn.

a.	Indoor.

b.	24V DC polarized.

c.	Minimum sound output at 95 DB or greater.

13.	Explosion proof fire alarm horn.

a.	Provide for linear accelerator area.

(1)	24 volt DC polarized.

(2)	Minimum sound output: 100 DB at 10 feet.

(3)	Manufacturer.

(a)	Pyrotronic Model No. HDC-EXP.

(b)	Simplex Model No. 2901-9820-41X.

(c)	Approved equal.

14.	Combination fixed rate-of-rise temperature detectors.

a.	Provide for linear accelarater area.

(1)	Explosion proof type.

(2)	Alarm at temperature rate of rise: 15 def F minimum.

(3)	Alarm at 200 deg F.

(4)	Plug in no tools requied, mounting.

(5)	Auxiliary contacts, local interlock and AMCS as noted.

(6)	Manufacturers.

(a)	Pyrotronic Model No. DT-200 EP

(b)	Simplex Model No. UC-2098-9433.

(c)	Approved equal.

15.	Fire Management Program:

a.	Actuation of any fire detection actuating device as noted shall initiate automatic fire management sequence which shall operate continuously until condition is restored to normal or reset by system operator.

b.	Fire detection actuating devices: individual annunciation of zones as noted

c.	Fire detection actuating devices in fire zone shall annunciate alarm at:

(1)	Existing Physical Plant Fire Command Station.

(2)	Existing DiDDCS Console.

d.	Actuating devices to include:

(1)	Existing manual pull station.

(2)	Sprinkler Alarm System:

(a)	Existing water flow and tamper switches.

(b)	Existing dry system valves and alarms.

(c)	Existing low air alarms.

(d)	Running status and current failure - all existing fire pumps.

(3)	HVAC duct smoke detector.

(4)	Existing or new space smoke detectors.

(5)	Smoke detectors in Electrical and Mechanical spaces.

(6)	Elevator lobby smoke detectors.

(7)	Any other existing fire related initiating device.

e.	Provide automatic fire management sequences, when any fire detection actuating device initiates alarm, to achieve following functions

(1)	Annunciate, display and print out alarm at existing DiDDCS consoles.

(2)	Transmit alarm to fire department identifying building.

f.	In addition to above function:

(1)	HVAC system fans will shut down when unit mounted duct smoke detector actuates

(2)	Indicate what kind of signal is being transmitted and to what zones.

(3)	Existing manual pull station shall in the affective fire alarm zone:

(a)	Release cooridor door holder.

(b)	Sound fire alert tone in affective zone and zones not in alarm.

(c)	Send an alarm signal to the existing fire alarm system and sound fire alarm annunciation for all existing floors

(4)	Door holder with integral smoke detector shall in affective fire alarm zone

(a)	Release corridor door holder.

(b)	Sound fire alert tone in affective zone and zone not in alarm

(c)	Shut down air handling units serving affective area.

(d)	Send an alarm signal to the existing fire system and sound fire alarm annuniciation for all existing floors

(5)	Space smoke detectors (existing or new) shall in the affective fire alarm zone

(a)	Release corridor door holder.

(b)	Sound fire alert tone in affective zone and zones not in alarm

(c)	Shut down air handling units serving affective area.

(d)	Send an alarm signal to the existing fire alarm system and sound fire alarm annunciation for all existing floors

(6)	Existing elevator lobby smoke detectors shall in the affective fire alarm zone

(a)	Release corridor door holder.

(b)	Sound fire alert tone in affective zone and zones not in alarm

(c)	Shut down air handling units serving affective area.

(d)	Return elevator to level one if the fire is on level one return to level two

(e)	Send an alarm signal to the existing fire alarm system and sound fire alarm annunciation for all existing floors

(7)	Existing sprinkler water flow switch shall in the affective fire alarm zone

(a)	Release corridor door holder.

(b)	Close return duct smoke dampers.

(c)	Sound fire alert tone in affective zone and zones not on alarm.

(d)	Shut down air handling units serving affective area.

(e)	Return elevator to level one if the fire is on level one return to level two

(f)	Send and alarm signal to the existing fire alarm system and sound fire alarm annuniciation for all existing floors

g.	Supervision:

(1)	The Fire Management System (FMS) shall be electrically supervised to automatically detect and report trouble conditions as follows

(a)	An open circuit in the initiating loop wiring to indicate zone trouble and sound the audible trouble signal

(b)	Other circuit faults shall indicate common trouble and sound the audible trouble signal, and indicate specific fault. Indication shall be provided for municipal trip disconnect, ground fault on any wiring, low battery voltage on standby batteries, primary power failure, and fault on any signaling circuit

(c)	Operation of a momentary silence switch shall silence the audible trouble signal, but the visual trouble indicator shall remain on until the malfunction has been corrected and the system has been reset

Part 3 -	EXECUTION

NOTE: DELETE IF N.A.

1)	BASE BID MANUFACTURERS

A.	DiDDCS:

1.	Johnson Controls

2)	SHOP DRAWINGS

A.	Shop drawing submission shall include software, hardware items subject to interpretation. Submissions in form of drawings, brochures, technical bulletins, narrative descriptions. Specifically include

1.	System override, operational descriptions.

2.	Schedule of input/output instrumentation by type.

3.	Complete input/output point schedules.

4.	Data collection and processing system hardware, software architecture including memory allocation maps

5.	System interfaces.

6.	Point identification, coding.

7.	Operator's terminal functions with respective system responses.

8.	System messages, printouts, advisories, logging formats, etc.

9.	Macro-flowcharts for each program prior to preparation of detailed flowcharts, actual programming

10.	Detailed list of points used for application program input/output.

11.	Spare capacity provisions - hardware, software.

3)	FUNCTION SCHEDULES

A.	Distributed Direct Digital and control system function schedules included to assist contractor in developing schedule of functions for DiDDCS it is not to provide total tabulation of functions

B.	Provide functions listed in schedule or as noted, determined in conjunction with application program specifications and drawings

C.	Schedule indicated initial assignment of remote functions to programs. This shall not override program requirements for on-line flexibility of assignment where designated

D.	Function schedule column headings:

1.	System: name or type of system and location.

2.	Function description: name or type of function which is alarmed, monitored or controlled

3.	Inputs: monitored or alarmed function.

4.	Outputs: controlled functions.

5.	Digital (input): indication signals from contacts associated with on-off, off normal-normal, or other indications initiated by making or breaking of electrical contact

6.	Dig. or digital (output): two state control outputs, except as noted, e.g., on-off, open-close, start/stop. Momentary or maintained as required

7.	Analog: I/O signals which are continuously variable.

8.	Maintenance: digital inputs associated with lower priority maintenance functions

9.	Status only: indication of status of nonalarm digital input.

10.	Change of state: high priority digital alarm resulting from off-normal remote equipment running status. Off-normal is condition when equipment running status differs from that required by operator command or local system operation

11.	Safety: alarm condition indicating change from safe (normal) to unsafe (off-normal) condition; not associated with operator command or local system operation

12.	High: high limit safety alarm.

13.	Low: low limit safety alarm.

14.	Proving device: sensing elements associated with corresponding digital alarm indication. Provided under this section, except as noted

15.	Flowswitch: separate switch element sensing flow resulting from "on" status. Example: differential pressure switch across equipment

16.	Limit switch: separate switch element from equipment under this section which is actuated upon reaching specific state

17.	Auxiliary contact: auxiliary contact on existing equipment which is actuated by reaching specific state. Provide any relays or additional interface equipment required for specified performance

18.	Indicate: indication of current value of analog input.

19.	Limits: ability of DiDDCS system to permit operator to assign high, low limits to corresponding analog indications. If analog point exceeds limits, low priority alarm condition occur

20.	Set-point: analog reset of set-point of local loop controller by DiDDCS system

21.	Start/stop: digital control output to start/stop, open-close, enable-disable, or turn off-on remote equipment

22.	Mode-change: digital control output to change operating mode of local loop controller

23.	Line supervision: requirements for supervision, as specified, of lines from RDCP to remote device

24.	Calculate: software calculation of function from other monitored functions, e.g., Btu, Kilowatts

25.	Totalize: requirement for totalization of variable set up initially by contractor in his software. Totalization program requirements for on-line assignment for totalization remain

26.	Quantities marked "X" are provided for each devide or as zoned on drawings and schedules

Part 4 -	AUTOMATIC CONTROL SYSTEMS

1)	General

A.	DiDDCS contractor shall provide and install instrumentation and required components necessary for complete system, except for items as noted in the following paragraph

B.	HVAC Contractor shall install only smoke detectors, air measuring equiment and wells for water temperature sensors as supplied by DiDDCS Contractor, in piping and duct systems

C.	Provide complete temperature control system with:

1.	Instrumentation.

2.	Interlock and control wiring.

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

3.	[SMOKE DETECTORS.

D.	[MAINTAIN IN CONDITIONED SPACES:

1.	[TEMPERATURE: WITHIN PLUS OR MINUS 1-1/2 [F (1 [C) FROM SET POINT, WITHIN DESIGN CONDITIONS

2.	[RELATIVE HUMIDITY: WITHIN PLUS OR MINUS 2-1/2 PERCENT FROM SET POINT, WITHIN DESIGN CONDITIONS

E.	[MAINTAIN FOLLOWING TEMPERATURES WITHIN PLUS OR MINUS 1-1/2 [F (1C).

1.	[COOLING COILS: LEAVING AIR.

2.	[PREHEAT COILS: LEAVING AIR.

3.	[MIXED AIR.

2)	<SHOP DRAWINGS

A.	Complete full size diagrams 22 in. x 34 in. of Digital control systems, 1 system per drawings showing piping, tubing, wiring, instruments with proper settings, and locations of all devices

B.	Automatic control, diagrams with the following descriptions:

1.	Sequence of operation.

2.	Sequence of interlocking.

3.	Operation of alarms.

4.	Controls schematic.

5.	System flow diagram.

6.	Ladder wiring diagram.

C.	Provide drawings and/or other documents for associated equipment.

1.	Automatic and smoke dampers (provided by others):

2.	Valves (provided by others).

D.	Elements sensing air temperature in ductwork or casings: submit details and proposed method of installation

3)	CONTROL SEQUENCES OF OPERATION

A.	General:

1.	Supply, install necessary sensing, controlling devices and wiring and commissioning of automatic control systems, so as to meet requirements of control sequences hereinafter specified and as noted, in accordance with Contract Documents

2.	Failure mode: if DiDDCS fails to operate, IRDCP will continue to operate according to the Software Program residing in the IRDCP.

3.	Each Stand-alone Control Unit within the DIDDCS shall perform both temperature control functions and energy management routines as defined by the operator

4.	Temperature control functions shall be executed within the stand-alone control unit. Loop control executed via direct digital control algorithms. User to customize control strategies and sequences of control, and be able to define appropriate control loop algorithms and choose the optimum loop parameters for loop control. Control loops shall support the following contro modes

a.	Two-position (on-off, slow-fast, etc).

b.	Proportional (P).

c.	Proportional plus integral (PI).

d.	Proportional, integral, plus derivative (PID).

5.	It shall be possible to fully create, modify or remove control algorithms within a specific stand-alone control unit while it is operating and performin other control functions. Each control loop shall be fully user defineable in terms of

a.	Sensor/actuators that are part of the control strategy.

b.	Control mode.

c.	Gain.

d.	Control action.

e.	Sampling time.

6.	Each stand-alone control unit shall be capable of performing the following energy management routines as a minimum

a.	Time of day scheduling.

b.	Start/stop time optimization.

c.	Peak demand limiting.

d.	Duty cycling (temperature compensated).

e.	Supply air reset.

f.	Chilled water reset.

g.	Economizer control.

h.	Outdoor air reset.

i.	Event initiated programs.

7.	The owner shall be able to create customized control strategies based upon arithmetic, Boolean or time delay logic. The arithmetic functions shall permit simple relationships between variables (i.e., plus, minus, divide, multiply) as well more complex relationships (i.e. square root, exponential)

NOTE: COORDINATE STARTER REQUIREMENTS WITH SECTION PROVIDING SAME.

B.	Operation of typical control safety devices:

1.	HOA switches: supply fans.

a.	Safety devices interlocked with "hand" and "automatic" positions in series with motor controller holding coil circuit

b.	Interlocking with other fans and equipment of system through "automatic" position only

c.	"Hand" position for maintenance only:

d.	Remote starting from DiDDCS through Automatic position only.

2.	HOA switches: return fan, transfer fan, exhaust fan (Interlocked with supply fans)

a.	Remote starting from DiDDCS through "automatic" position only.

b.	"Hand" position for maintenance operation only.

3.	Exhaust fans, such as general or toilet (operating independently).

a.	All safety devices interlocked with "hand" and "automatic" positions in series with motor controller holding coil circuit

b.	Remote starting from DiDDCS through "automatic" position only.

c.	"Hand" position for maintenance operation only.

4.	Safety devices: Provide for all system except as otherwise noted below

a.	Freeze protection thermostat (freezstat) - provide one freeze protection thermostat per coil section, wired to stop supply fan, (VIA HARD WIRED CONNECTIONS) open return air damper and start return fan. Thermostat to be automatic reset type. Whenever freeze protection thermostat opens and alarm will be sounded at the H.P.U

NOTE: AMEND AS REQUIRED - COORDINATE REQUIREMENTS

b.	For systems over 2000 cfm, (provide) a duct mounted smoke detector of the ionization type which will stop the supply associated inerlocked equipment should products of combustion be sensed. Provide auxilliary contacts for alarm and trouble indications at HPU. Fire alarm system shall perform shutdown sequences

c.	Damper end switches shall be hardwired into starter circuit. Provide to prevent operation of fans until damper is fully open. Provide relays so it will not be necessary to hold start button until damper is fully open. Retur air damper end switch shall be locked out of operation to prevent fans shutdow when the damper is modulating while fans are in operation. Provide damper en switches as follows

(1)	On exhaust fan discharge air dampers.

(2)	On outside air and return air dampers.

(3)	On dampers, which if closed with fan running, could cause distribution system damage

(4)	On supply fan discharge smoke dampers.

(5)	On dampers as noted.

(6)	When a fan is commanded to start, the IRDCP will open the dampers, confirm full open position through damper end switch and then start fan all through appropriate hardwired interlocks

C.	Sequences of operation.

NOTE: IN ALL OF THE FOLLOWING SEQUENCES, THE DESIGNER IS GIVEN A CHOICE AS TO WHICH STATEMENTS APPLY TO THE PARTICULAR PROJECT BEING DESIGNED. THESE CHOICE STATEMENTS ARE ENCLOSED IN PARENTHESIS. CHOOSE THE PROPER STATEMENT WORDING TO COMPLETE THE THOUGHT. ELIMINATE NON APPLICABLE STATEMENTS WHICH MA NOT BE ENCLOSED IN PARENTHESIS

<NOTE: FILL IN CORRECT AIR HANDLER DESIGNATIONS

1.	Constant air volume systems with recirculating air: AHU-1-2

a.	General

(1)	Outside air damper, 2 position type, with electronic motor, normally closed

(2)	Cooling coil control valves, modulating type, with electronic motor, normally closed

b.	System off:

(1)	When the system is off, the cooling coil valve and the outside air dampers shall be in their normally closed position as stated above

c.	System on: The unit supply fan shall be automatically started and stopped via the DIDDCS

(1)	When the supply fan is energized the outside air damper shall open 100 percent, closing its end switch allowing the fan to start. When the fan starts, the interlocked exhaust fan shall start and the control system will be energized. The IROCP shall through a temperature sensor in the fan discharge, control the cooling coil valve to maintain its setting

(2)	A freezestat (one per coil section) in the preheat coil discharge will stop the supply and return fans whenever its settings is exceeded. Provided auxilliary contacts for annunciation at the DIDDCS console

(3)	Provide output signal wiring from IRDCP's to electronic motorized valves and dampers. Coordinate with Division 15 ACS contractor for output signal to motors

(4)	Provide power wiring to transformers.

2.	Constant air volume systems with recirculating air: AHU1-1

a.	General

(1)	Minimum outside air damper, 2 position type, with electronic motor, normally closed

(2)	Cooling coil control valves, modulating type, with electronic motor, normally closed

(3)	AHU-1-1 is interlocked with exhaust fan EF-R-2.

(4)	Humidifier valve, modulating with electronic motor, normally closed.

b.	System off:

(1)	When the system is off, the cooling coil valve and the outside air dampers shall be in their normally closed position as stated above

c.	System on:

(1)	The unit supply fan shall be automatically started and stopped via the DIDDCS

(2)	When the supply fan is energized the outside air damper shall open 100 percent, closing its end switch allowing the fan to start. When the fan starts the control system will be energized. The IROCP shall through a temperature sensor in the fan discharge, control the cooling coil valve to maintain its setting

(3)	A freezestat (one per coil section) in the preheat coil discharge will stop the supply and return fans whenever its settings is exceeded. Provided auxilliary contacts for annunciation at the DIDDCS console

(4)	Provide output signal wiring from IRDCP's to electronic motorized valves and dampers. Coordinate with Division 15 ACS contractor for output signal to motors

(5)	Provide power wiring to transformers.

d.	Humidity.

(1)	Return air humidity sensor shall through its IRDCP algorithm maintain humidity by modulating the unit mounted humidifier control valve or override the discharge sensor algorithm and modulating the cooling coil valve to maintai its setting

(2)	To prevent over humidification, output to humidifier control valve subject to a discharge high limit humidity sensor 6 ft minimum downstream of the humidifier

(3)	Provide output signal from IRDCP's to electronic motorized valve. Provide power wiring to transformer. Coordinate with Division 15 for output signal to motor

3.	Constant air volume systems with recirculating air: AHU-R-1

a.	General

(1)	Minimum outside air damper, 2 position type with electronic motor, normally closed

(2)	Maximum outside air damper, modulating type with electronic motor, normally closed

(3)	Return air damper, modulating type with electronic motor, normally closed

(4)	Relief air damper, modulating type with electronic motor, normally closed

(5)	Preheat coil control valves, modulating with electronic motor, normally open

(6)	Cooling coil control valves, modulating with electronic motor, normally closed

(7)	Humidifier valve, modulating with electronic motor, normally closed

(8)	All equipment shall have hardwired interlocks.

(9)	AHU-R-1 is interlocked with exhaust fan EF-R-1.

b.	System on:

(1)	The unit supply fan shall be automatically started and stopped via the DIDDCS

(2)	When the supply fan starts, the interlock return fan and exhaust fan shall start simultaneously. when the system is energized, the minimum outside air damper shall open 100 percent as set by the respective loop control software within the IROCP, the maximum outside air damper will open and the return air damper shall open 100 percent, closing their damper end switches allowing the supply fan and return fan to start. The IRDCP shall, through a temperature sensor located in the supply fan discharge, control the cooling preheat coil control valve in sequence to maintain its setting. The preheat foil control valve will be controlle by an electric/electronic low limit type, preheat coil discharge sensor to a constant discharge temperature of 45 degree F regardless of fan status.

(3)	A sensor located in the mixed air, will through the action of the IRDCP control loop, modulate the outdoor air, return air and relief air dampers in sequence to maintain an adjustable mixed air temperature. The dampers shall be subject to overcall by an economizer program will select either minimum outside air or mixed air control poop to provide an air mixture with the lowest temperature to cooling coil. Master outside air sensor, acting through the IRDCP will return the system dampers to the minimum ventilation position when the outside air temperature exceeds a programmed adjustable setting

(4)	A freezestat (one per coil section) in the preheat coil discharge will stop the supply and return fans whenever its settings is exceeded. Provided auxilliary contacts for annunciation at the DIDDCS console

(5)	Provide output signal wiring from IRDCP to electronic motorized valved and dampers. Coordiante with Division 15 ACS contractor for output signal to motor

(6)	Provider power wiring to transformers.

c.	Warm-up cycle.

(1)	Provide a sensor in the return air, which will, through the action of the IRDCP control loops, upon sensing a return air temperature below design conditions upon initial start up, cause the system to perform as follows

(a)	Outside air and relief exhaust dampers closed.

(b)	Return air damper and preheat coil control valve open.

(c)	Provide signal to open all variable volume boxes.

(2)	When return air temperature reaches design conditions as measured by representative room sensors, the system will automatically return to normal heating mode

d.	Cool down cycle.

(1)	Provide a sensor in the return air, which will, through the action of the IRDCP control loops, upon sensing a return air temperature above design conditions upon initial start up, cause the system to perform as follows

(a)	If outdoor air temperature is below the return air temperature,

(A)	Outside air and relief exhaust dampers open.

(B)	Return air damper closed.

(C)	Cooling coil control valve open.

(b)	When return air temperature reaches design conditions as measured by representative room sensors, the system will automatically return to normal cooling mode

(c)	If outdoor air temperature is above the return air temperature,

(A)	Outside air and relief exhaust dampers closed,

(B)	Return air damper and cooling coil control valve open.

(d)	When return air temperature reaches design conditions as measured by representative room sensors, the system will automatically return to normal cooling mode

e.	Night purge cycle.

(1)	During the cooling cycle, two hours (adjustable) before normal occupancy, the outdoor air temperature will be sampled. If it is determined that the outdoor air temperature is below design temperature, the system will be started on 100 percent outdoor air and exhaust without mechanical cooling and provide signal to open all VAV boxes 100 percent. At the end of this tw hour period the system will go to cool down or normal cooling cycle as determined by the sequences described above

f.	Night heating cycle.

(1)	During the heating cycle, a night room sensor will cycle the system on 100 percent return air to maintain a lower than day time night temperature setting. During this cycle, the preheat coil control valve and the variable volume boxes will be open 100 percent when the fan runs

g.	Humidity.

(1)	Return air humidity sensor shall through its IRDCP algorithm maintain humidity by modulating the unit mounted humidifier control valve or override the discharge sensor algorithm and modulating the cooling coil valve to maintai its setting

(2)	To prevent over humidification, output to humidifier control valve subject to a discharge high limit humidity sensor 6 ft minimum downstream of the humidifier

(3)	Provide output signal from IRDCP to electronic motorized valve.

(4)	Provide power wiring to transformer.

(5)	Coordinate with Division 15 for output signal to motor.

4)	OPERATING INSTRUCTIONS

A.	Printed and personnel instructions:

1.	Printed instructions for operation, maintenance of each major item and component of automatic control system

a.	Equipment identified to enable adjustment and service.

b.	Show terminal identification and equipment designation.

2.	Actual operating instructions for typical periods.

a.	Not necessarily consecutive and over period of one year.

b.	Instruction by competent representative to instruct Owner's personnel in operation, care of automatic control systems, minimum 2 hours per system

5)	AIR PIPING FOR THE DIGITAL TEMPERATURE CONTROL SYSTEM

A.	General

B.	Instrumentation:

1.	Control instruments.

a.	Electric/electronic.

2.	Remote bulb mounting:

a.	Ducts, casings: flanged.

b.	Pipes under 4 in., tanks: brass, separable sockets.

c.	Pipes over 4 in. - stainless steel.

d.	Insulated work: flanges and sockets extension neck type to finish flush with insulation surface

3.	Elements, sensing air temperature in ductwork or casings:

a.	Averaging type.

b.	Sensing length or number of elements to measure air temperature throughout entire cross section of duct or casings

4.	Sensors:

a.	Accuracy:

(1)	Temperature and pressure: plus or minus 1 percent of scale.

(2)	Humidity: plus or minus 2 percent of scale.

b.	Transmitter spans operating point at midscale.

(1)	Room temperature: 50 F (10 C).

(2)	Duct air temperature: 100 F (37.8 C) or 200 F (93 C) as required by maximum duct temperature

(3)	Dew-point temperature: 50 F (10 C).

(4)	Room air return air humidity: 50 percent RH.

(5)	Outside air - 100 deg F .

C.	IRDCP cabinets:

1.	Freestanding or front access wall-mounted type.

2.	Doors: maximum 3 ft (.9m) wide.

3.	Provide with:

a.	Framed, plastic-encased control diagram of respective system secured to cabinet

4.	Provide as required for each:

a.	Air-Conditioning system.

b.	Other controlled systems.

5.	Following flush-mounted on front of cabinet door, operable with door closed

a.	Service intercoms as required.

6.	Other requirements:

a.	Wiring, tubing connections: inside cabinet.

b.	Components requring external field wiring connections: prewired in cabinet to numbered terminal strips

c.	Live terminals operating at less than 50 volts: separately enclosed.

D.	Instrumentation:

1.	General:

a.	Locations: responsibility of control system manufacturer.

b.	Elements sensing air temperature in ductwork or casings, including low temperature safety cutoff thermostats

(1)	Element spread out in sine-curve fashion.

(2)	Supported by stainless steel grid or multiple bulb holders.

2.	Smoke detectors (duct type).

a.	Sampling tube shall cross duct and penetrate far side to facilitate cleaning per NFPA 72E

E.	Wiring and conduit.

1.	Provide following:

a.	Complete electric wiring installed connected to electronic or electric control sensing devices and to control system devices

b.	Wiring in control cabinets: connected to terminal strips.

2.	Wires labeled at ends to show location of opposite ends.

3.	Points of terminated strips permanently labeled to show instrument or item served

4.	Wiring in accordance with applicable codes.

6)	TESTS

A.	Adjustment of control systems and final test:

1.	Automatic control systems adjusted, placed in service by qualified representatives of manufacturer

2.	Control systems tested in presence of Owner and Architect to demonstrate satisfactory operation