6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

GENERAL NOTES

MIAMI UNIVERSITY

PHYSICAL FACILITES DEPARTMENT

OXFORD, OHIO

CPA BUILDING

HVAC MODIFICATIONS

PROJECT GOALS/TIMELINE REFERENCE DRAWINGS

SPECIFICATIONS

DRAWING LIST BUILDING INFORMATION

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

joining method.

Ball Valves shall be Anvil International, Inc., Victaulic Company, with bronze body with threaded ends.

Ball valves shall be two-piece, full-port, brass ball valves with stainless-steel trim rated at 150 psig.

Domestic cold water insulation shall be mineral-fiber, preformed pipe insulation, Type I: 1 inch thick. Domestic hot and

recirculated hot water shall be mineral-fiber, preformed pipe insulation, Type I: 1 inch thick.

match joining method.

Valves in Insulated Piping shall have a 2-inch stem extension. Ball Valves shall have extended operating handle of

non-thermal-conductive material, and protective sleeve that allows operation of valve without breaking the vapor seal or disturbing

insulation. Butterfly Valves shall have extended neck.

Valves shall always be placed in accessible positions for operation and repairs.

Provide chain operators on all valves installed more than 7'_0" above floor.

Valves 2" and smaller in copper pipe shall have solder ends and in steel pipe, they shall have threaded ends. Valves 2-1/2" and

larger shall be flanged valves.

Valves 2-1/2" and smaller shall be ball valves unless shown otherwise and valves 3" and larger shall be butterfly valves unless

shown otherwise.

Ball Valves shall be Watts, Nibco, or equal, full ported ball valves with cast bronze body with sweat or threaded ends, chromium

plated bronze ball, stem, handle, teflon packing rings, seals, seats, etc. Each valve shall be rated 400 PSI WOG and 150 PSI

steam and shall be bubbletight against 100 PSI.

Gate valves in steel pipe shall be forged steel with union bonnet, outside screw and yoke, rising stem, solid wedge, designed for

Butterfly valves shall be Keystone Figure 222, Milwaukee, Watts, Grinnell, or equal butterfly valves, suitable for 225 PSI line

pressure, and shall be bubbletight bidirectionally against 225 PSI differential pressure and 250 PSI dead end pressure.

Automatic Butterfly Valves shall be of same type, manufacturer, and construction as manually_operated butterfly valves.

The valve shall be equipped with an electric actuator capable of producing sufficient output torque for infrequent operation and

shall be mounted in a NEMA 4X enclosure.

A servo amplifier and speed control module shall incorporate a solid_state comparator and switching circuits with zero, gain, span

and deadband adjustments. The speed control function shall vary actuator operating times. Opening and closing speeds shall be

adjusted independently.

A valve position transmitter which provides a 4_20 mA output signal which is proportional to the actuator position. A

power supply shall be supplied as part of the control package.

Balance Valves shall be Bell & Gossett "Circuit Setter" type C.B., or Armstrong Type CBV, all bronze, calibrated balancing valves

with indicator and two capped readout ports.

Piping 6" shall be supported by steel clevis or split ring malleable iron hangers with adjustable rods; hangers shall be spaced not

more than 10'-0" apart; provide one additional hanger at each location where pipe changes direction. On piping conveying chilled

water, the pipe rings shall go around outside of the covering; provide galvanized steel formed half diameter bearing plates around

the bottom half of pipe covering; for piping insulated with fiberglass insulation, plates to be lined with short length of foam glass

insulation, plate shall be 12" long, 12 gauge. Supports for hangers shall be solid rods of ASTM A-107 steel with threads on both

end rods or all-thread rods. Rods shall be sized according to the requirements of NFPA bulletins. Piping shall not be supported

from ductwork, electric conduit, plumbing, or other utility lines, and vice versa. Each utility shall be a separate installation and each

shall be independently supported from the building structure. Hangers shall be supported by Rawl or Hilti expansion bolts installed

per manufacturer's installation instructions and load ratings (with 5:1 safety factor) and installed in concrete slabs or masonry as

required. Any cutting and patching required to install hangers, supports, rods, or inserts shall be performed by this contractor.

All new equipment shall have a concrete foundation with chamfered edges of height and 3" larger in plan than the equipment

base. Provide and set requisite anchor bolts.

Install hangers and supports to allow controlled expansion movement of piping systems.

TAGGING

All new valves shall be identified with numbered 2" diameter brass tags attached to valve wheels or stems with brass chains.

Tags shall have stamped letters, to designate piping system, and numbers, i.e., - heating H-1, chilled water CH-1, etc. Contractor

shall prepare a printed chart, designating the location function of each valve marked.

PIPING IDENTIFICATION

The contractor shall include identification of all piping installed under the contract. Such identification shall be in the form of

stenciling.

Pipe Identification shall comply with ANSI A13.1 for lettering size, length of color field, colors, and installed viewing angles of

identification devices.

Piping contents shall be labeled as follows:

Service Color: Arrows and Bands Designation

Drain Gray DR

Domestic Cold Water Hard Blue C.W.H.

Chilled Water Green -White CH.W.

Chilled Water Return Green -Yellow CH.W.R.

Heating Hot Water Supply Yellow-Red H.H.W.S.

Heating Hot Water Return Yellow-Orange H.H.W.R.

Low Pressure Steam Black-Orange STM-LOW

All underground pipe shall be marked with a continuous, underground-type plastic line marker. Tracer wire shall also be installed

over piping. Confirm location of markers with the University.

HVAC Ductwork Identification

Provide plastic laminate or stenciled signs and arrows, in black or white (whichever provides most contrast with the ductwork

color).

Type of Service Color: Arrows Designation

Supply Air - - SUPPLY

Return Air - - RETURN

General Exhaust - - EXHAUST

Equipment Identification

Contractors shall include identification of all equipment.

Identification shall be on the form of a plastic laminate sign on each major item of mechanical equipment.

Testing, Adjusting, and Balancing

TAB Contractor shall be certified by NEBB and shall have a TAB Field Supervisor: Employee of the TAB contractor

and certified by NEBB, and TAB Technician: Employee of the TAB contractor and who is certified by NEBB as a TAB

technician.

Use standard TAB contractor's forms approved by Owner.

Instrumentation Type, Quantity, Accuracy, and Calibration: As described in

"Instrumentation."

Provide equipment for testing. Make necessary temporary connections to perform testing. Test piping systems before

insulation is installed. Tests shall be performed before any work is concealed, covered, or painted.

Hydrostatic tests shall be maintained for a minimum of eight (8) hours; air tests shall be maintained for a minimum of

twenty-four (24) hours.

All hydronic piping shall be tested and made tight initially under air pressure and then under hydrostatic pressure each

equal to 1-1/2 times the working pressure but not less than 125 PSI.

Contractor shall perform air balance of existing air handling systems prior to removal of equipment.

Contractor shall examine systems for installed balancing devices, and verify that locations of these balancing devices

are accessible. Examine the approved submittals for HVAC systems and equipment.

Examine HVAC equipment and filters and verify that bearings are greased, belts are aligned and tight, and equipment

with functioning controls is ready for operation.

Examine terminal units and verify that they are accessible and controls are connected and functioning.

Examine valves for proper installation.

Examine heating and cooling coils for correct piping connections and for clean and straight fins.

Examine operating safety interlocks and controls on HVAC equipment.

Perform testing and balancing procedures on each system according to the procedures contained in NEBB's

"Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems" and comply with requirements

Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and recommended testing

procedures. Crosscheck the summation of required outlet volumes with required fan volumes.

Develop a plan to simulate diversity for variable-air-volume systems.

Check airflow patterns from the outdoor-air louvers and dampers and the return- and exhaust-air dampers.

Locate start-stop and disconnect switches, electrical interlocks, and motor starters.

Verify that motor starters are equipped with properly sized thermal protection.

Check dampers for proper position to achieve desired airflow path.

Check for airflow blockages.

Check condensate drains for proper connections and functioning.

Check for proper sealing of air-handling-unit components.

Verify that air duct system is sealed.

Compensating for Diversity: When the total airflow of all terminal units is more than the indicated airflow of the fan, place a

selected number of terminal units at a minimum set-point airflow with the remainder at maximum-airflow condition until the total

airflow of the terminal units equals the indicated airflow of the fan. Select the reduced-airflow terminal units so they are distributed

evenly among the branch ducts.

After the fan systems have been adjusted, adjust the variable-air-volume systems as follows:

Set outdoor-air dampers at minimum, and set return- and exhaust-air dampers at a position that simulates full-cooling load. Select

the terminal unit that is most critical to the supply-fan airflow and static pressure. Measure static pressure. Adjust system static

pressure so the entering static pressure for the critical terminal unit is not less than the sum of the terminal-unit manufacturer's

recommended minimum inlet static pressure plus the static pressure needed to overcome terminal-unit discharge system losses.

Measure total system airflow. Adjust to within indicated airflow. Set terminal units at maximum airflow and adjust controller or

regulator to deliver the designed maximum airflow. Use terminal-unit manufacturer's written instructions to make this adjustment.

When total airflow is correct, balance the air outlets downstream from terminal units the same as described for constant-volume air

systems. Set terminal units at minimum airflow and adjust controller or regulator to deliver the designed minimum airflow. Check

air outlets for a proportional reduction in airflow. If air outlets are out of balance at minimum airflow, report the condition but leave

outlets balanced for maximum airflow. Remeasure the return airflow to the fan while operating at maximum return airflow and

minimum outdoor airflow. Adjust the fan and balance the return-air ducts and inlets. Measure static pressure at the most critical

terminal unit and adjust the static-pressure controller at the main supply-air sensing station to ensure that adequate static pressure

is maintained at the most critical unit. Record final fan-performance data.

Procedures For Hydronic Systems

Prepare test reports with pertinent design data, and number in sequence starting at pump to end of system. Check the sum of

branch-circuit flows against the approved pump flow rate. Correct variations that exceed plus or minus 5 percent.

Prepare hydronic systems for testing and balancing according to the following: Open all manual valves for maximum flow. Check

control valves for specified sequence of operation, and set at indicated flow. Set system controls so automatic valves are wide

open to heat exchangers. Check air vents for a forceful liquid flow exiting from vents when manually operated.

Hydronic Systems

Measure flow at all automatic flow control valves to verify that valves are functioning as designed.

Measure flow at all pressure-independent characterized control valves, with valves in fully open position, to verify that valves are

functioning as designed.

Set calibrated balancing valves, if installed, at calculated presettings.

Measure flow at all stations and adjust, where necessary, to obtain first balance.

Adjust balancing stations to within specified tolerances of indicated flow rate as follows: Determine the balancing station with the

highest percentage over indicated flow. Adjust each station in turn, beginning with the station with the

highest percentage over indicated flow and proceeding to the station with the lowest percentage over indicated flow. Record

settings and mark balancing devices.

Check settings and operation of each safety valve. Record settings.

Heat-Transfer Coils

Measure, adjust, and record the following data for each water coil: Entering- and leaving-water temperature. Water flow rate.

Water pressure drop. Dry-bulb temperature of entering and leaving air. Wet-bulb temperature of entering and leaving air for

cooling coils. Airflow. Air pressure drop.

Tolerances

Set HVAC system's air flow rates and water flow rates within the following tolerances: Supply and Return Fans and Equipment

with Fans: Plus or minus 5 percent. Air Outlets and Inlets: Plus or minus 5 percent. Heating-Water Flow Rate: Plus or minus 5

percent. Cooling-Water Flow Rate: Plus or minus 5 percent.

Final Report

Prepare a certified written report; tabulate and divide the report into separate sections for tested systems and balanced systems.

Include a certification sheet at the front of the report's binder, signed and sealed by the certified testing and balancing engineer.

Include a list of instruments used for procedures, along with proof of calibration.

Final Report Contents: Fan curves. Manufacturers' test data. Field test reports prepared by system and equipment installers.

Other information relative to equipment performance.

General Report Data: Title page. Name and address of the TAB contractor. Project name. Project location. Engineer's name

and address. Contractor's name and address. Report date. Signature of TAB supervisor who certifies the report. Table of

Contents with the total number of pages defined for each section of the report. Number each page in the report. Summary of

contents. Nomenclature sheets for each item of equipment. Data for terminal units. Notes to explain why certain final data in the

body of reports vary from indicated values. Test conditions for fans and pump performance forms including the following: Settings

for outdoor-, return-, and exhaust-air dampers. Conditions of filters. Cooling coil, wet- and dry-bulb conditions. Fan drive settings

including settings and percentage of maximum pitch diameter. Settings for supply-air, static-pressure controller. Other system

operating conditions that affect performance.

Air-Handling-Unit Test Reports:

Unit Data: Unit identification. Location. Make and type. Model number and unit size. Manufacturer's serial number. Unit

arrangement and class. Discharge arrangement. Sheave make, and bore. Center-to-center dimensions of sheave, and amount of

adjustments. Number, make, and size of belts. Number, type, and size of filters.

Motor Data: Motor make, and frame type and size. Horsepower and rpm. Volts, phase, and hertz.

Full-load amperage and service factor. Center-to-center dimensions of sheave, and amount of adjustments.

Test Data (Indicated and Actual Values): Total air flow rate in cfm. Total system static pressure in inches wg. Fan rpm.

Discharge static pressure in inches wg. Filter static-pressure differential in inches wg. Cooling-coil static-pressure differential in

inches wg. Heating-coil static-pressure differential in inches wg. Outdoor airflow in cfm. Return airflow in cfm. Outdoor-air damper

position. Return-air damper position.

Apparatus-Coil Test Reports:

Coil Data: System identification. Location. Coil type. Number of rows. Fin spacing in fins per inch o.c. Make and model

number. Face area in sq. ft. Tube size in NPS. Tube and fin materials.

Test Data (Indicated and Actual Values): Air flow rate in cfm. Average face velocity in fpm. Air pressure drop in

inches wg. Outdoor-air, wet- and dry-bulb temperatures in Return-air, wet- and dry-bulb temperatures in

Entering-air, wet- and dry-bulb temperatures in Leaving-air, wet- and dry-bulb temperatures in

Water flow rate in gpm. Water pressure differential in feet of head or psig. Entering-water temperature in

Fan Test Reports: For supply or return fans, include the following:

Fan Data: System identification. Location. Make and type. Model number and size. Manufacturer's serial number.

Arrangement and class. Sheave make, size, and bore. Center-to-center dimensions of sheave, and amount of

adjustments in inches.

Motor Data: Motor make, and frame type and size. Horsepower and rpm. Volts, phase, and hertz. Full-load

amperage and service factor. Sheave make, size, and bore. Center-to-center dimensions of sheave, and amount of

adjustments. Number, make, and size of belts.

Test Data (Indicated and Actual Values): Total airflow rate in cfm. Total system static pressure in inches wg. Fan

rpm. Discharge static pressure in inches wg. Suction static pressure in inches wg.

Duct Traverse Reports :

Report Data: System and air-handling-unit number. Location and zone. Traverse air temperature in Duct

static pressure in inches wg. Duct size in inches. Duct area in sq. ft. Indicated air flow rate in cfm. Indicated velocity

in fpm. Actual air flow rate in cfm. Actual average velocity in fpm. Barometric pressure in psig.

Air-Terminal-Device Reports :

Unit Data: System and air-handling unit identification. Location and zone. Apparatus used for test. Area served.

Make. Number from system diagram. Type and model number. Size. Effective area in sq. ft.

Test Data (Indicated and Actual Values): Air flow rate in cfm. Air velocity in fpm. Preliminary air flow rate as needed

in cfm. Preliminary velocity as needed in fpm. Final air flow rate in cfm. Final velocity in fpm. Space temperature in

Inspections

Initial Inspection:

After testing and balancing are complete, operate each system and randomly check measurements to verify that the

system is operating according to the final test and balance readings documented in the final report.

Check the following for each system: Measure airflow of at least 10 percent of air outlets. Measure water flow of at

least 5 percent of terminals. Measure room temperature at each thermostat/temperature sensor. Compare the

reading to the set point. Verify that balancing devices are marked with final balance position. Note deviations from the

Contract Documents in the final report.

Final Inspection: The TAB contractor's test and balance engineer shall conduct the inspection in the presence of the

Owner.

TAB Work will be considered defective if it does not pass final inspections. If TAB Work fails, proceed as follows:

Recheck all measurements and make adjustments. Revise the final report and balancing device settings to include all

changes; resubmit the final report and request a second final inspection. If the second final inspection also fails,

Owner may contract the services of another TAB contractor to complete TAB Work according to the Contract

Documents and deduct the cost of the services from the original TAB contractor's final payment.

Additional Tests

Within 90 days of completing TAB, perform additional TAB to verify that balanced conditions are being maintained

throughout and to correct unusual conditions.

Seasonal Periods: If initial TAB procedures were not performed during near-peak summer and winter conditions, perform

additional TAB during near-peak summer and winter conditions.

Insulation

No insulation shall be applied until pipe work has been tested for tightness and approved by the Engineer.

All hanger rods must be perpendicular to piping before pipe insulation is applied.

Where clevis hangers are installed outside insulation; provide 12" long section of foamglass insulation at each hanger the same

thickness as the adjoining insulation; also provide saddles.

Existing insulation cut or damaged in the course of the work shall be repaired.

All insulation, jackets, tapes, vapor barriers, adhesives, etc. shall be fire_safe (flame spread rating of 25 or less, fuel contribution

rating of 35 or less, and smoke developed rating of 50 or less). All adhesives used and required in the application of pipe covering

and insulation shall be applied per the manufacturer's recommendations for the specific application. All insulating materials,

adhesives, jackets, etc. shall be of approved non_combustible or flame retardant type complying with the Local and State Basic

Building Codes and N.F.P.A. Bulletin No. 90A.

All insulated piping which penetrates walls, floors, and/or roofs with a fire-resistive rating shall be insulated with molded foamglass

"ASJ-SSL" covering, including a dual purpose fireproof, kraft aluminum foil laminated (white) jacket.

Insulation For All Exposed Ducts shall be Johns-Manville, Owens Corrning, or Knauf

Glass Fiber Duct Insulation

Rectangular Ducts: All rectangular insulated ducts shall be insulated on the outside with 1-1/2" rigid, 3 lb. density fiberglass board,

tightly secured with sheet metal washers and screws or weld pins 12" to 18" on centers. On cold ducts, all joints shall be sealed

with 3" wide vaporsealing tape.

Round Ducts: All round duct shall be insulated on the outside with 1-1/2" thick fiberglass insulation in one piece molded sections

with foil kraft universal fire-resistive and vaporseal jacket. Insulation shall be applied with white vapor barrier ASJ Plus jacket.

Joints shall be tightly butted and covered with factory furnished vapor barrier tapes, coated with vapor barrier adhesive, the ends

of the tape overlapped and held securely with outward-clinch staples. Staples to be coated with vapor barrier adhesive. Ends of

insulation shall be sealed off with vapor barrier adhesive or mastic.

Sound Insulation

Supply ducts shall be sound insulated on inside with 1" thick, non_combustible AP Armaflex SA self-adhering close-cell

elastomeric sheet. shall be butted tightly together to provide effective insulation and to prevent condensation.

Should condensation appear on ductwork with internal lining, the contractor shall repair or replace insulation or shall provide

external duct insulation. For lined ducts, dimensions of duct shown on drawing is dimension inside sound lining

Piping Insulation

Insulation of Steam, and Return Piping shall be insulated with Schuller or Pabco asbestos-free hydrous calcium silicate or

expanded perlite sectional pipe insulation with fireproof vapor barrier ASJ-PLUS (white) jacket. Insulation thickness shall be

Fittings, flanges, etc. shall be insulated with fabricated mitered segments of insulation equal in thickness to the insulation

of adjoining pipe. Fittings may be insulated with insulating cement of equal thickness. Insulation on fittings shall be cement

smooth. Valves, Strainers, etc. shall be insulated with a removable insulating cover. Entire piping, valves, fittings, flanges, etc.

shall be completely insulated on all steam and return piping.

Insulation Of Hot Water (Heating) Piping And Humidifier Piping shall be Johns-Manville "Micro_Lok", Owens Corning ASJ, Knauf,

Certainteed, or equal, insulation shall be 1-1/2" thick fiberglass insulation in one piece molded sections with fire_resistive and

vaporseal white ASJ-Plus jacket. End joints shall be tightly butted and all joints shall be lapped and neatly stapled 3" on centers.

All fittings shall be insulated with preformed sectional rigid fiberglass units, mechanically secured and spiral wrapped with cloth

tape with white exterior surface.

Insulation of Chilled Water Supply and Return shall be Johns-Manville "Micro_Lok", Owens Corning ASJ-Plus, Knauf, Certainteed.

Insulation shall be in one piece molded sections with foil kraft universal fire_resistive and vaporseal (white) jacket. Insulation shall

be applied with kraft foil vapor barrier jacket. Insulation thickness shall be thick. The longitudinal seams shall be

overlapped and shall be coated with a vapor barrier adhesive. End joints shall be tightly butted and covered with factory furnished

vapor barrier tapes, heavily coated with vapor barrier adhesive. Staples shall be coated with vapor barrier adhesive. Ends of

insulation shall be sealed off with vapor barrier adhesive or mastic. All fittings, flange, valves, etc. shall be insulated with

preformed sectional fiberglass units, mechanically secured and spiral wrapped with special vaporsealing tape with white exterior

surface. Cover with lagging cloth.

Medium Pressure Supply Ducts: Medium pressure supply ducts shall be fabricated from AK Steel, or equal, zincgrip galvanized

steel sheets. Ducts shall conform with all SMACNA Duct Construction Standards for 4" Pressure Class for Gauge and

Reinforcement.

Low Pressure Supply Return And Exhaust Ducts: Low pressure supply ducts shall be fabricated from galvanized

iron or steel sheets. Ducts shall conform with all SMACNA Duct Construction Standards for Gauge and Reinforcement for 2"

pressure class.

Stainless Steel Ducts: Within 18" of outdoor air and exhaust air louvers, ducts shall be constructed of 304-2B stainless steel with

mill finish and shall be 26 gauge.

Casings: Air plenum for new air conditioning units shall be constructed as shown and shall be of self_supporting type consisting of

prefabricated insulated steel panels forming a complete enclosure on top, bottom, sides, and ends. Panels shall consist of 2" thick,

3 lb. density insulation (Owens Corning, Pittsburgh, or Schuller manufacture), encased in inner and outer galvanized sheet steel

shells of 22 gauge, except interior of outdoor air intake plenum within 5 feet of louver shall be constructed from No. 20 gauge,

304-28 mill finished stainless steel. Outer shell and inner face shall be adequately braced and stiffened to form a self_supporting

structure of neat appearance. Junction posts between panels, corner posts, etc. shall be formed of 18 gauge sheet steel with panels

secured to posts. Each assembly shall be gasketed or caulked to be airtight at 4" H20 pressure difference. Access doors shall be

24" x 48", of similar construction. Doors shall be set in reinforced frames, and shall be fitted with gaskets and heavy duty hinges and

door handles. Submit complete shop drawings showing details of construction for approval.

Duct Sealing: Retain one of two paragraphs below. Retain first paragraph if retaining subparagraphs for seal class and leakage

class in "Duct Schedule" Article; otherwise, delete first and retain second paragraph.

Outdoor, Exhaust, and Return-Air Ducts: Seal Class C. Unconditioned Space, Supply-Air Ducts in Pressure Classes Higher than

2-Inch wg and Lower: Seal Class B. Unconditioned Space, Supply-Air Ducts in Pressure Classes Higher than 2-Inch wg: Seal

Duct Cleaning

PART 1 - Retain this article for applications where construction dust and debris in duct system must be removed before

air-system operation, or if applying for LEED certification.

PART 2 -

Start-Up" requires that distribution systems be clean of dirt and debris.

Clean new duct system(s) before testing, adjusting, and balancing.

Mechanical Cleaning: Clean metal duct systems using mechanical cleaning methods that extract contaminants from within duct

systems and remove contaminants from building. Use vacuum-collection devices that are operated continuously during cleaning.

Connect vacuum device to downstream end of duct sections so areas being cleaned are under negative pressure. Use mechanical

agitation to dislodge debris adhered to interior duct surfaces without damaging integrity of metal ducts, duct liner, or duct

accessories. Clean fibrous-glass duct liner with HEPA vacuuming equipment; do not permit duct liner to get wet. Replace

fibrous-glass duct liner that is damaged, deteriorated, or delaminated or that has friable material, mold, or fungus growth. Clean

coils and coil drain pans according to Keep drain pan operational. Rinse coils with clean water to remove latent

residues and cleaning materials; comb and straighten fins. Provide drainage and cleanup for wash-down procedures. Antimicrobial

Agents and Coatings: Apply EPA-registered antimicrobial agents if fungus is present. Apply antimicrobial agents according to

manufacturer's written instructions after removal of surface deposits and debris.

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

Custom Indoor Central Station Air Handling Units

Drawings and general provisions of the Contract, including General and Supplementary Conditions apply to this Section.

Furnish custom air handling units with arrangement and capacities as shown.

Units shall be furnished complete with housing (including outside air, discharge and mixing plenums), air mixing section,

panel supply air fans, panel return air fans, filter section (with filters), direct drives, motors, auto control dampers, internal

fan isolation, cooling and heating coils, drain pans, humidifier section, access sections, and all necessary

appurtenances. Units shall have insulated, hinged access doors as shown on the Drawings.

Filters and filter racks shall be furnished with units. Coordinate racks with actual manufacturer being furnished. Filters

shall be upstream side serviceable. Filters shall not be delivered to the job site until the construction filters are to be

removed and the first set of actual filters are to be installed.

Provide fan curves and sound power ratings with submittals. Fan curves to include entire range of fan, speeds and

static pressures.

Auto control dampers to be provided with the units.

Provide the following: Custom Air Handling Units. Detailed drawing to scale of unit. Certified fan-performance

curves with system operating conditions indicated. Certified fan-sound power ratings. Certified coil-performance ratings

with system operating conditions indicated. Motor ratings, electrical characteristics, and motor and fan accessories.

Material gages and finishes. Filters with performance characteristics. Dampers, including housings, linkages

and operators. Operation and maintenance data for all above items.

Delivery, Storage, And Handling

Protect internal parts against rust and corrosion. Store equipment indoors and maintain at higher than ambient

dew-point temperature. If outdoor storage is necessary, store off the ground in watertight enclosures. Unit will be

required to be knocked down to permit rigging into the building reassembled.

Quality Assurance

Air handling performance data shall be certified in accordance with ARI Standard 430. Unit sound performance data

shall be rated per ARI Standard 260 and reported as sound power. Unit insulation and insulation adhesive shall comply

with NFPA-90A requirements for flame spread and smoke generation. Insulation adhesive shall be UL listed.

Products

Units are based on Temtrol. Units by the following manufacturers of the same size, type, and style and meeting ALL

other requirements may be furnished at the contractor's option: Haakon, Air Enterprises, Climate Craft.

Unit Frame And Casing: The entire air handling unit shall be fabricated of an arc welded unitized tubular steel and

channel framework complete with heavy gauge structural tubular steel base rails equipped with lifting lugs for rigging.

The structural base frame (not less than high) shall be fitted with cross members to support all interior components

and finished with a "double bottom" construction of 20 gauge outer and 12 gauge aluminum treadplate inner floor

surface with a total foam insulation thickness of 4".

Welded structural members shall be spaced to reinforce the casing panels for maximum anticipated static pressures.

The unit base and casing framework shall be painted with one coat of zinc chromate primer and one coat of rust

resistant enamel paint prior to panel attachment.

Casing panels shall be double die formed, lock forming quality G-90 galvanized steel secured to framework with neoprene gasketed

cad-plated screws on 10" centers. All panels to be gasketed with closed cell neoprene gasket and completely removable without

affecting the structural integrity of the unit.

The entire casing shall be double wall construction. Sections of units shall be furnished with 20 gauge galvanized steel solid inner

liner. All fan sections shall be perforated.

Panels shall be constructed so that each section can be washed clean with a hose when necessary. Provide a floor drain in each

section for this purpose. Drains shall be trapped and piped through the side of the base channel. All drains except the cooling coil

drain pan to be initially capped.

Insulation: Unless otherwise noted, unit casing shall be internally insulated with 3" thick, variable density duct liner type fiberglass.

Average density shall be 3 lb per ft3. All exposed surfaces such as angles, braces, etc., in contact with exterior surfaces shall be

covered with insulation in such a manner to prevent condensation on the exterior casing. Insulation shall be installed in such a

manner as not to be disturbed if panels are removed. Insulation shall be secured to the casing surfaces and framework with

adhesive over entire surfaces and further secured with mechanical fasteners on approximate 24" centers. All insulation and

accessories including adhesives and facing shall have a composite fire and smoke hazard rating tested by ASTM E84, NFPA 225,

and UL 723 not exceeding: Flame Spread 25, Smoke Developed 50.

Access Panels and Doors: Same materials and finishes as cabinet and complete with hinges, latches, handles, gaskets, and

windows.

Each unit section shall have an access door. Through properly designed access, ease of maintenance, removability of components,

unit serviceability shall be assured. Access doors shall be of the same construction as the panels described above.

They shall be guaranteed tight closing by one of the following two means: Two continuous separate 45 degree bevel angle

gaskets to assure a true, perpendicular, tight, non-shearing compression fit. Door and frame shall be fabricated with integral offset

rims, working together to form a double gasketed seal effective against pressure differences in either direction. Access doors shall

have an integral offset lip that supports a neoprene gasket that mates to door frame and door frame shall be likewise.

Single gasket seals or 90 degree gasket configurations with offset hinges are not acceptable.

Door frame shall be constructed of not less than 10 gauge sheet metal using materials congruent to panel and door construction.

All access doors shall be provided with a minimum of two chrome plated, high-pressure die-cast zinc or stainless steel, heavy duty,

flush offset hinges with nylon bearings. Offset in hinges shall be sufficient to prevent over compression of the doors gasketed

sealing system and minimize gasket wipe.

All access doors shall be provided with at least two handles operable from either side. Handles shall be heavy-duty, chrome plated,

latches die-cast from non-corrosive zinc-aluminum alloy or stainless steel. Handles shall provide adequate pressure to form a

positive gasket seal without excess that causes gasket deterioration.

Each access door shall have a built-in static pressure probe port for ease of pressure readings across various internal components

and to limit unnecessary or unauthorized access inside the unit.

Other door accessories shall include self-locking nut for handles, Teflon striker plates, windows and hardware that will assure long

term proper door operation.

Doors shall be hinged to open against the fan pressure. Access doors shall be provided with vision panels.

Drain Pans

Formed sections of stainless steel sheet complying with requirements in ASHRAE 62. Fabricate pans with slopes in two planes to

collect condensate from cooling coils (including coil piping connections and return bends) and humidifiers when units are operating

at maximum catalogued face velocity across cooling coil. Double-Wall Construction: Fill space between walls with foam insulation

and seal moisture tight. Drain Connections: Both ends of pan. Pan-Top Surface Coating: Elastomeric compound. Units with

stacked coils shall have an intermediate drain pan or drain trough to collect condensate from top coil. Provide drain lines from

intermediate drain pans to primary drain pan. All internal compartments

shall be individually drained with drain connections on accessible side of unit. Drain connections on both sides where both area

accessible. Cap all drain connections except for cooling coil drain pan connection.

Supply And Return Fans

The supply and return fan systems shall consist of the number and diameter of fans shown on the drawings and air handling unit

schedule. Each fan to be direct drive, arrangement 4, aluminum airfoil fan wheels constructed per AMCA requirements and bearing

the AMCA seal. All fans to be Class 3 construction. The use of Class 1 or Class II fans is not permitted. The fan systems shall be

selected to deliver the specified airflow quantity at the specified operating Total Static Pressure. The specified fan/motor speed

frequency shall not exceed 60 HZ. The fan system consisting of multiple fans shall be selected to operate at a system Total Static

Pressure that does not exceed 90% of the specified fan's peak static pressure producing capability at the specified fan/motor speed.

If one active fan in the fan system fails or is turned off then the backdraft damper shall close allowing the balance of the fans in the

fan system to operate to maintain unit CFM setpoint by the means of fan speed increase.

Each fan/motor shall include an 11 gauge, A60 galvanized steel intake wall, 14 gauge spun steel inlet funnel, and an 11

gauge G90 galvanized steel motor support plate and structure. The fan intake wall, inlet funnel, and motor support structure shall be

coated for superior corrosion resistance. All fans, electrical motors and in the array shall be permanently labeled and

sequentially tagged in order to identify them by maintenance personnel.

The fan array shall be provided with acoustical silencers that reduce the bare fan discharge sound power levels by a minimum of 15

dB re watts throughout the eight octave bands with center frequencies of 125, 250, 500, 1000, 2000, 4000, and 8000 HZ

when compared to the same unit without the silencers. The silencers shall not increase the fan total static pressure, nor shall it

increase the airway tunnel length of the air handling unit when compared to the same array unit without the silencer array.

Acoustical material to be Melamine.

Alternate manufacturers must submit acoustical data for review and approval prior to the bid indicating that the proposed alternate

equipment can meet all specified performance requirements without impacting the equipment performance or design features

including duct connection location, unit weights, acoustical performance, and specified total fan HP for each array. Proposals

submitted which indicate a higher connected fan HP than specified or scheduled will not be accepted.

The fan array shall consist of multiple fan and motor spaced in the air way tunnel cross section to provide a uniform airflow

and velocity profile across the entire air way tunnel cross section and components contained therein.

Each fan cube shall be factory wired to a master control panel(s). Wire sizing shall be determined and installed in accordance with

applicable current NEC standards and the Electrical Specifications.

Provide barometric backdraft dampers for multiple array systems. Backdraft dampers shall not add additional pressure drop to the

system.

The fan array shall produce a uniform air flow profile and velocity profile within the airway tunnel of the air handling unit not to

exceed the specified cooling coil and/or filter bank face velocity when measured at a point from the intake side of the fan array

One fan assembly in the fan array for each adjustable frequency drive (AFD) shall be supplied with a complete flow measuring

system, which indicates airflow via differential pressure. The flow measuring system shall consist of a flow measuring station with

four static pressure taps and four total pressure tubes located at the throat of the fan inlet cone. The flow measuring station shall not

obstruct the inlet of the fan and shall have no effect on fan performance (flow or static pressure) or sound power levels. The flow

measuring station shall have accuracy of 0.05% of actual flow. A surface mounted indicator, located on the unit exterior, shall

provide a 4-20 mA DC output control signal for use by the Temperature Control Contractor.

Discharge and inlet fan sound power levels shall not exceed the values scheduled for the array. If alternate fan systems are

proposed by the Contractor it shall be the responsibility of the Contractor proposing the alternate to guarantee that noise levels in

the occupied space will not exceed that per the basis of design system. Any acoustical treatment for alternate fan systems must be

approved by the Engineer prior to installation, and any such acoustical treatment or subsequent treatment will be done at the sole

expense of the Contractor proposing the alternate fan system.

Each fan/motor cartridge shall be dynamically balanced to meet ANSI/AMCA Standard 204-05, Fan Application Category BV-5, to

meet or exceed Balance Quality Grade G 0.56 or 0.022 IN/SEC vibration velocity. AHU's manufacturer shall

Provide detailed documentation and calculations of actual residual unbalance and vibration analysis for fan array with

the unit submittal.

Motor Specification: All motors shall be standard pedestal mounted type. Motors shall be equal to Baldor Super E

(Premium Efficiency) TEAO enclosure with Class F insulation and 200 degree C inverter spike resistant magent wire.

Motor weight shall not exceed 175 lb. Maximum motor size to be 10 HP and shall be maximum, 1750 RPM. NEMA

Design B; T-Frame, 1.15 service factor. The motors shall be tested to IEEE standard 841-2001. All motors shall meet

the energy policy act (EPACT) regulations. Motors shall meet the electrical characteristics as specified for voltage,

RPM, and efficiencies in the unit schedule and specifications.

Furnish and install motor shaft grounding rings similar to AEGIS SGR for all motors with AFD's.

Manufacturer shall provide flexible metal conduit from the motor junction box to a field mounted wire raceway.

Each motor shall be wired through a Square D GV2 overload/disconnect/circuit breaker mounted in a main control panel.

Each motor is to be wired to a terminal block to accept main power from the variable frequency drive(s).

As required by system design, all electrical devices must be coordinated to accept Adjustable Frequency Drives (AFD)

for normal operation and a three contactor bypass circuit configuration for across the line bypass operation. AFDs will

be provided by the unit manufacturer and shall be shipped loose for field installation and wiring by the manufacturer's

personnel. The bypass contactor and the Adjustable Frequency Drive shall be sized accordingly to start and hold all

motors in the Fan Wall served by the AFD. Provide short circuit protection for drive and bypass contactor through

means of using circuit breakers.

Motor circuit protectors shall be used for each motor in the fan array. Motor circuit protectors will be mounted in a

remote enclosure that is separate from VFD enclosure. Variable frequency drive enclosures and remote motor circuit

protector enclosures must be mounted at a minimal distance from fan array motors and from each other.

Provide three phase power distribution wiring and control wiring as required. All three phase power components shall

have a rating listed for Short Circuit Current Rating.

Sound Power Data

Bare fan sound power for the supply air and return air fan walls shall not exceed the levels in the following tables:

Supply Air Fans

Bare Fan Sound Power (dB re: 10E-12 watts)Hz ; 100 lwa inlet, 91 outlet

Return Air Fans

Bare Fan Sound Power (dB re: 10E-12 watts) Hz, 88 lwa inlet, 83 outlet

Heating And Cooling Coils

Coils shall be designed with aluminum plate fins and OD, seamless copper tubes. fins shall have

collars drawn, belled and firmly bonded to the tubes by means of mechanical expansion of the tubes. No soldering or

tinning shall be used in the bonding process. Coils shall be mounted in the unit casing to be accessible for service and

can be removed from the unit either through the side or top. Capacities, pressure drops and selection procedure shall

be certified in accordance with ARI Standard 410. Coils to be furnished with same end connections and designed for

water supply in the bottom and out the top.

Hot water heating coil(s) shall be enclosed in a coil section. Coil headers and U-bends shall not be exposed. Coil shall have a

supply header to ensure distribution of hot water to each tube of coil. Coil shall be proof tested to 300 psig and leak tested to 200

psig, air pressure underwater.

Chilled water coil(s) shall be enclosed in a coil section. Coil headers and U-bends shall not be exposed. Water flow shall be

counter to airflow. Coils shall be proof tested to 300 psig and leak tested to 200 psig air pressure underwater. Headers shall be

either round copper or cast iron. Steel pipe headers are not acceptable. Chilled water casing shall be stainless steel.

Each coil section shall be supported by a separate rack. This rack shall allow any one coil section to be removed through the unit

casing, normal to the direction of air flow, without disturbing any other coil section. At coils, each side of the casing shall have a

removable access panel.

Each cooling coil section shall have a 14 gauge, stainless steel condensate drain pan extending at least thirty (30) inches

downstream of the coil face. Upper drain pans shall be individually piped down to the unit pan.

The unit shall be constructed with the drain pan high enough in the unit to permit proper condensate drain trapping at full unit design

static pressure. See detail on drawings.

Unit manufacturer shall extend piping from coil headers to outside the unit as shown on the coil details.

Filters

Prefilters filters shall be 2" thick Farr 30/30, medium efficiency, pleated, disposable type. Each filter shall consist of a non-woven

cotton fabric media, media support grid and enclosing frame. The filter shall be listed by Underwriters' Laboratories as Class II. The

filter media shall have an average efficiency of 25-30% on ASHRAE Test Standard 52-76 MERV 8. The effective filter media shall

be no less than 7.0 square feet of media per 1.0 square foot of filter face area. Initial resistance at 500 fpm approach velocity shall

not exceed 0.35 inches W.G. The media support shall be a welded wire grid bonded to the filter media. The enclosing frame shall

be constructed of a rigid, heavy-duty, high wet strength beverage board, with diagonal support members bonded to the air-entering

and air-exit side of each pleat, to insure pleat stability. The inside periphery of the enclosing frame shall be bonded to the filter pack,

thus eliminating the possibility of air bypass. Equivalent filters as manufactured by American Air Filter may be provided at the

manufacturer's option.

Final filters shall be 12" thick Farr Riga-Air, high performance, deep pleated, totally rigid and totally disposable type. Each filter shall

consist of high density microfine glass fiber media, media support grid, control stabilizers, diagonal support bracing and enclosing

frame. Filter media shall be of high density microfine glass fibers, which are laminated to a non-woven synthetic backing to form a

lofted filter blanket. The filter media shall have an average efficiency of 90-95% on ASHRAE Test Standard (52-76) MERV 13. It

shall have an average arrestance of not less than 98% on that standard. Filters shall be listed by Underwriters' Laboratories as

Class 2. Equivalent filters as manufactured by American Air Filter may be provided at the manufacturer's option.

The filter housing assembly shall be capable of housing all pre-filters and final filters in a single assembly. Filter frames to be

installed in air handling units by unit manufacturer. Air handling unit manufacturer shall coordinate requirements for the filter housing

assembly prior to manufacturing units. Provide all required springs and clips for the installation of the filter media to the filter housing

frames. Filters shall be arranged for upstream servicing.

The air handling unit manufacturer shall provide two (2) complete sets of filters for each filter bank. Install one set of filters in units

when construction is complete. Furnish the other set as a spare to the University when the project is complete. HVAC contractor

shall provide temporary filters for use during construction.

All supply ductwork connections to be made with bellmouth fittings provided by the air handling unit manufacturer.

Light Fixtures

Unit manufacturer shall furnish and install a vapor tight, compact fluorescent, marine type, guarded, service light fixture in each

section. Fixtures shall have 100 watt A-21 R.S. lamps.

A 30 minute timer (no-hold) with pilot light shall be provided adjacent to the supply air section access door for control of all air

handler lights. Manufacturer may, at their option, provide separate timers with pilot light at each section.

All lights and timer switches shall be factory wired to a single junction box location requiring a single point 120V connection from the

Electrical Contractor. Wiring between shipping sections shall be the responsibility of the HVAC Contractor.

All electrical work shall be in accordance with the requirements of project electrical specifications.

Humidifiers shall be provided by the HVAC Contractor as specified and factory installed by the air handling unit manufacturer. Piping

shall be extended to the exterior of the unit at the factory. Coordinate requirements with humidifier manufacturer.

Provide 14 gauge, stainless steel, drain pan in entire humidifier section.

Auto Control Dampers

Outside air and return air dampers shall be furnished by the air handling unit manufacturer. Air handling unit manufacturer shall

coordinate the size of openings required. Dampers shall be sized as shown on drawings. Dampers shall be mounted in the unit at

the factory. Damper actuators shall be furnished and installed by the Temperature Control Contractor. Coordinate motor mounting

with Temperature Control Contractor.

Auto control dampers shall be as specified.

Execution

Extend piping from condensation drain pan(s) to floor drain. Coordinate exact location of floor slab depressions (if required) for the

installation of the cooling coil trap assembly. Before startup of unit, flood drain pan and test for leaks; repair as required.

Power wiring shall be by the Electrical Contractor.

Outside air and return air dampers shall be furnished with the units. Dampers and operators shall be mounted in the unit at the

factory. Coordinate motor mounting with Temperature Control Contractor.

Coils shall be mounted in suitable supporting frames so that coils are readily removable. Provide blank-off sections and gaskets as

required to prevent air leakage around the coils.

Startup Service

Final Checks before Startup: Perform the following: Verify that shipping, blocking, and bracing are removed. Verify that unit is

secure on mountings and supporting devices and that connections to piping, ducts, and electrical systems are complete. Verify that

proper thermal-overload protection is installed in motors, starters, and disconnect switches. Perform cleaning and adjusting

specified in this Section. Disconnect fan drive from motor, verify proper motor rotation direction, and verify free fan wheel rotation

and smooth bearing operations. Reconnect fan drive system, align belts, and install belt guards. Lubricate bearings, pulleys, belts,

and other moving parts with factory-recommended lubricants. Set outside- and return-air mixing dampers to minimum outside-air

setting. Comb coil fins for parallel orientation. Install clean filters. Verify that manual and automatic volume control and fire and

smoke dampers in connected duct systems are in fully open position.

Cleaning

Clean air handling units internally, on completion of installation, according to manufacturer's written instructions. Clean fan interiors

to remove foreign material and construction dirt and dust. Vacuum clean fan wheels, cabinets, and coils entering air face.

After completing system installation and testing, adjusting, and balancing modular indoor air-handling and air distribution systems,

clean filter housings and install new filters.

Humidifier (ALTERNATE BID)

Supply a direct steam injection humidifier, Neptronic model SKD or Dri-Steem, or equal. The construction of the grid type manifold

must be in stainless steel 304, without condensate drip or objectionable steam noise. The humidfier consists of a number of vertical

steam dispersion tubes connected to a horizontal header which is custom built. Steam is emitted into the air stream though brass

nozzles, located on the vertical tubes, designed to provide even dry steam distribution across the entire area of the plenum.

Electronic Steam Controller (ESC): The ESC shall have a micro-processor based with backlit LCD display to

automatically control the humidification system for a dry operation and energy saving cycles. It will display in the scroll

mode the humidity set point, the humidity level, the humidity demand and output, the temperature value from the

sensors. It will also indicate special diagnostic parameters such as abnormal operation and alarms. The ESC shall be

programmable using the menu UP/DOWN buttons to program %R.H. set point, control parameters and indication on

number of actual service hours. . In conjunction with the temperature sensor installed at the outlet of the steam

separator, the ESC will insure that the system has reached the adequate temperature prior to opening the control valve

for an optimum operation of the system.

Temperature Sensor: Provide RTD temperature sensor inserted in a brass thermal well to monitor the media

temperature inside the piping and to prevent cold operation of the humidifier.

Control Valve: Provide brass construction steam control globe valve, with equal percentage flow characteristics. Valve

shall be normally closed when not powered. Valve Actuator: Electric, 24vac, 2-10vdc and with failsafe feature. Actuator

must have a variable speed stroke to achieve a slower opening of the steam valve to prevent condensate accumulation

to be injected into the air stream.

Trap: Provide float-and-thermostatic steam trap, sized for maximum condensate flow with cast iron body.

Separator: Provide stainless steel separator with internal baffles and silencing chamber to receive steam at operating

pressure, and to ensure dry steam supply to the control valve. Provide connections for steam inlet, control valve, and

drain.

Strainer: Provide strainer with cast iron body.

Modulation Control: Modulation is achieved though variation of the position of seat opening of the steam supply globe

valve.

Capacity Reduction: The maximum output can be programmed from 0 to 100% by using the Working Capacity feature

(ESC).

Dual Duct Terminal Units

Dual duct terminal units shall be ultra low leakage type of the following manufacturers: Nailor Industries Inc., Price

Industries, Titus, Trane, Tuttle & Bailey.

Configuration: Two volume dampers inside unit casing with mixing attenuator section and control components inside a

protective metal shroud.

Casing: 0.032-inch steel single wall

PART 1 - casing Lining: Adhesive attached, 1/2-inch thick, coated, fibrous-glass duct liner complying with

and having a maximum flame-spread index of 25 and a maximum smoke-developed index of 50, for both

Cover liner with nonporous foil. Air Inlets: Round stub connections or S-slip and drive connections for duct attachment.

Air Outlet: S-slip and drive connections. Access: Removable panels for access to parts requiring service, adjustment,

or maintenance; with airtight gasket.

Volume Damper: Galvanized steel with peripheral gasket and self-lubricating bearings.

Velocity Sensors: Multipoint array with velocity sensors in cold- and hot-deck air inlets and air outlets.

Direct Digital Controls: Single-package unitary controller and actuator specified.

Direct Digital Controls: Bidirectional damper operators. Control devices shall be compatible with controls specified and

shall have the following features: Damper Actuators: powered closed, spring return open. Terminal Unit

Controller: Pressure-independent, variable-air-volume controller with electronic airflow transducers factory calibrated to

minimum and maximum air volumes, and having the following features: Retain applicable subparagraphs below.

a. occupied and unoccupied operating mode. Remote reset of airflow or temperature set points. Adjusting

and monitoring with portable terminal. Communication with temperature-control system specified.

DDC Work

Before commencing work DDC contractor shall meet with the owner and review and further define the sequences of operation for

the systems. This contract shall include the furnishing of all labor and materials required for the installation of new temperature

regulating systems to monitor, control, and regulate automatically the new heating, air conditioning, and ventilating systems, as

shown on the drawings. The temperature control equipment shall be installed by trained mechanics and technicians employed by

the manufacturer and working in conjunction with the other contractors.

Bids shall be based upon a Siemens Apogee system by local branch office, with electronic sensors for indication and control

functions, electronically actuated devices including new dampers, valves, etc., and all connections to sensors and actuated

devices. The DDC system for this project shall be fully integrated into the existing Miami University Campus System. This

integration shall provide BACnet Level 6 capability. All bidders of controls shall submit to Engineer, prior to bid date, a complete

brochure containing literature covering each item of control, and identifying its application. Prior to award of contract, bidders may

also be required to furnish preliminary temperature control layout drawings and description of operation of same.

Contractor shall remove certain existing controls for portions of building HVAC systems scheduled to be removed. Remove

unused exposed air piping; plug unused concealed air piping at walls. All items including thermostats, controllers, DDC sensors,

DDC controllers and actuators which will not be reused shall be carefully removed by the contractor and shall remain the property

of Miami University.

Where existing systems are not specifically mentioned in this specification, they shall remain, as is. Contractor will not be

responsible for proper operation of existing controls.

All BACnet devices and services supplied as part of this project shall conform strictly to the ASHRAE/ANSI BACnet standard. Any

deviations, limitations, or omissions when compared to the standard shall be fully outlined in writing as part of the required

submittals.

BACnet Conformance Classes: All control system devices provided and installed shall strictly conform to the conformance classes

defined under the current version of the BACnet protocol at the time of bidding. Any changes in the protocol from the time of

award of contract through the end of the warranty period shall be provided and installed free of cost to the University. All BACnet

devices supplied shall be able to initiate and execute service requests as indicated in each conformance class. Control system

devices included in this project shall conform to conformance class one (1).

BACnet Functional Groups: All new digital system devices provided and installed shall conform to the requirements of current and

future BACnet functional groups for all object types and control applications found in the I/O schedule in this specification.

The following BACnet functional groups shall be fully supported: Clock Functions, Hand Held Workstation (HHWS), Personnel

Computer (PCWS), Event Initiation, Event Response, Files, Reinitialize, Virtual Operator Interface, and Virtual Terminal.

Interface Responsibility: It shall be the control contractors responsibility to ensure that the BACnet interface between the existing

Siemens or ALC control system network and the new digital controllers perform as specified. All new data points and control

programs shall appear to the existing operators console as native points and shall interoperate with the existing system hardware

and software so that all alarms, commands, set point adjustments, time schedules, point databases and controller programs are

totally functional through the BACnet gateway interface. It shall be the contractor's responsibility to map the new controller points

and all functionality into the gateway.

DDC controller shall be programmed to perform the following seasonal changeover mode of operation for each air handling unit.

When the outside air enthalpy is less than return air enthalpy, each air handling unit shall operate in the Economizer mode of

operation.

When the outside air enthalpy is greater than return air enthalpy, or when outside air temperature rises above 75 deg. F. (DDC

adjustable), each air handling unit shall switch to Non-Economizer, wherein chilled water is used to condition the space.

The following changeover functions shall occur.

Air Handling Unit supply fans and return fans shall operate continuously.

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739

For new Air Handling Unit, when supply fans are operating: Cause outdoor air and exhaust air dampers to open. Cause outdoor

air, return air, and exhaust air dampers to be fully operational, during Economizer mode. Cause heating coil valve to be

operational. Cause cooling coil valve to be operational during Non-Economizer mode and cause valve to close during Economizer

mode. Cause humidifier to be operational when unit is not in economizer mode or when in cooling mode.

ACU-2

New AC-2 will supply conditioned air to the building. The unit shall operate continuously. Variable frequency drives associated

with supply fans and return fans will operate fans at varying speed settings to provide supply air volume at setpoint. New static

pressure sensors shall also be utilized to limit high static.

Provide new controls, consisting of DDC controller, electronic sensors, etc., to monitor and control the system.

Operation of Controls.

DDC controller shall cause supply and return fans to operate continuously. Permit outdoor air, return air, and exhaust air dampers

to be operational during Economizer mode; close outdoor air and exhaust air dampers and open return air dampers during

Non-Economizer mode. Permit cooling coil valve to be operational only as described herein. Permit heating coil valve to be

operational only as described herein. Permit humidifier to be operational as described herein. Permit supply fan and return fan

speed control devices to be operational.

Mixed Air Controls

A manually inputted command at DDC controller shall permit manual closing of outdoor air and exhaust air dampers and manual

opening of return air dampers when supply fans are operating. When supply fans are indexed to "off" or when fans stop because

of a fire condition, low temperature cutout condition or high supply air static pressure condition; DDC controller shall close outdoor

air and exhaust air dampers and shall open return air dampers.

When air handling unit is operating in Economizer mode, DDC controller shall modulate bypass outdoor air, return air and exhaust

air dampers to maintain mixed air temperature at supply air temperature setpoint minus 2 deg. F. (DDC adjustable).

Air flow tracking operation: DDC controller, receiving signals from air flow monitoring stations located in the outdoor air, return air,

and supply air plenums and future zone occupancy sensors in all spaces shall begin to increase the percent open position of the

outdoor air damper if necessary to maintain the outdoor air CFM ventilation requirement setpoint as calculated by ASHRAE

62-1989 multiple zone equation, using Owner's latest application of this standard.

Cooling coil valve controls: When outside air temperature is above 50 deg. F., DDC controller shall modulate cooling coil valve to

maintain preset supply air temperature reset schedule based on outside air temperature. Supply air temperature shall be F. -

F. When the supply fan is not operating, or outside air temperature falls below 50 deg. F., DDC Controller shall close cooling

coil valve.

Heating coil valve controls: DDC controller shall modulate heating coil valve to maintain preset supply air temperature reset

schedule based on outside air temperature. Supply air temperature shall be based on the following reset schedule (DDC

adjustable). When supply fan is not operating, or outside air temperature rises above 50F DDC controller shall close hot water

heating valve.

Supply Air Temperature Outside Air Temperature

Fan Speed Controls:

DDC controller, receiving signal from supply air flow devices and air static pressure sensor, shall vary supply air flow devices and

fan speed in order to maintain airflow and static air pressure at setpoint in supply ductwork. In addition, DDC controller shall vary

return fan speed based on measured airflow values (supply air, return air and outside air) and a fixed pressurization constant (5%

of system total supply air) in order to cause return fan speed to track behind supply fan speed and maintain a positive pressure

within the building.

Zone Controls:

All variable air volume (VAV) terminal units shall use electronic damper valve actuators as specified. The damper/valve actuators

shall move in a smooth, steady progression without overloading the actuator in any way. The Direct Digital Control Contractor

shall be responsible for properly sizing actuators to the torque requirements of each terminal unit damper. Electronic actuated

valves shall be capable of being manually opened or closed.

Provide terminal equipment controllers (TEC's) for all variable air volume terminal boxes. Each TEC shall be a

microprocessor based direct digital control unit and shall be capable of operating either as a stand-alone controller or

on a multi-drop communications network originating at a direct digital controller at associated air handling unit direct

digital controller.

Provide an airflow sensor with multi-point, center averaging velocity sensors. The multi-point sensor shall provide an

average of the box total air flow at the box discharge. The controller shall modulate the terminal damper actuator from

the minimum to maximum CFM set points specified for each VAV terminal box. The Direct Digital Control Contractor

shall adjust the volume indication at the controller to the actual volume found at the minimum and maximum setpoint

of the terminal box.

Each terminal equipment controller controlling space temperature shall be provided with a matching room temperature

sensor. The sensor shall be an RTD providing the following minimum performance requirements: Accuracy: 0.5

Degrees F., Operating range: 35 Degrees F. to 115 Degrees F., Setpoint range: 55 Degrees F to 95 Degrees F.,

Modes: Occupied, Unoccupied, Heating, and Cooling, and Calibration adjustments: None.

Room temperature sensor shall include a terminal jack integral to the sensor assembly. The terminal jack shall be

used to connect a portable laptop or similar operator's terminal to control and monitor all hardware and software points

associated with the controller.

The room temperature sensor shall include the following auxiliary devices: Setpoint adjustment buttons dial, LCD

temperature indicator, and Occupied override pushbutton.

Each controller shall include algorithms incorporating proportional, integral and derivative (PID) gains for all

applications. All PID gains and biases shall be field adjustable by the user via a portable computer.

Terminal controller's shall be capable of having occupied/unoccupied setpoint controlled by a dry contact located in

certain room's occupancy sensor(s) also used for direct control of room lighting. For rooms without occupancy

sensors, room terminal controller shall be provided with a time of day schedule to allow for scheduling of rooms HVAC

operation.

Terminal controller hardware inputs/outputs required: Terminal box discharge air velocity sensor (analog), Terminal

box discharge air temperature sensor (analog), Room temperature sensor (analog), Room temperature setpoint dial

(analog), Damper actuators (analog), Reheat valve actuator (analog).

Digital Inputs: Occupied/Unoccupied switch-over signal.

Safety Controls

Smoke Sensor: If products of combustion are sensed by air duct smoke sensors, a hard wired smoke shutdown

control relay furnished and installed in the DDC panel shall perform the following: Shut down the supply fan variable

frequency controller, Shut down the return fan variable frequency controller, Close all outdoor air and exhaust air

dampers and open the return air damper, Shut down all associated exhaust fans, and Signal DDC of smoke condition.

High Static Pressure Cutout: If a high static air pressure condition is sensed by static pressure device located in

supply air duct, a hardwired high pressure shutdown control relay in the DDC panel shall perform the following: Shut

down the supply fan variable frequency controller, Shut down the return fan variable frequency controller, Close all

outdoor air and exhaust air dampers and open the return air damper, Shut down all associated exhaust fans, and

Signal DDC of high static pressure condition.

Low Temperature Cutout: If a low temperature of 40 deg. F. occurs at the inlet to the heating coil, a hardwired low

temperature shutdown control relay in the DDC panel shall perform the following: Shut down the supply fan variable

frequency controller, Shut down the return fan variable frequency controller, Close all outdoor air and exhaust air

dampers and open the return air damper, Shut down all associated exhaust fans, and Signal DDC of low temperature

condition.

Direct Digital Controllers

Furnish, install, connect and program, requisite direct digital controllers of Siemens Building Technologies.

Each controller shall be capable of performing the energy management functions and optimization program execution.

Programs shall include algorithms for proportional, integral, and derivative control as needed. Adjustments to the

controller shall include: proportional, gain, and integral rate, the velocity and acceleration constants associated with

incremental control, and on/off values of two position control. All setpoints shall be adjustable at DDC control panel.

Each DDC control panel shall have the ability to override its controlled device. Provide hand-off-auto operator override

switches for all outputs.

The DDC system shall be Web-based and interoperable using BACnet communications. The web server shall be configured and

licensed in such a way that permits a minimum of 25 simultaneous users. Manufacturer's products shall be in accordance with

ANSI/ASHRAE 135, ANSI/ASHRAE 135.1, ASME B31.1 and NFPA 70.

Locate DDC controller cabinets in the most accessible space close to the controlled equipment.

With each DDC panel, furnish a surge protection device. Wiring within DDC panels of different voltages shall be isolated from

each other.

Valve Actuators

Modulating actuators shall be provided as required by the sequence of operations. Actuators shall provide the minimum torque

required for proper valve close-off. The valve actuator shall be sized based on valve manufacturer's recommendations for flow

and pressure differential. All direct shaft mount rotational actuators shall have external adjustable stops to limit the travel in either

direction.

Modulating Actuators shall accept 24 VAC or VDC and 120 VAC power supply and be UL listed. The control signal shall be 2-10

VDC or 4-20 mA and the actuator shall provide a clamp position feedback signal of 2-10 VDC. The feedback signal shall be

independent of the input signal.

Control Valves

Valves shall be: Belimo PICCV, Pressure Independent Characterized Ball Control Valves.

The control valves shall accurately control the flow from 0 to 100% full rated flow with an equal percentage flow characteristic. A

maximum of 5 psi shall be across the valve.

Forged brass body rated at no less than 400 PSI, chrome plated brass ball and stem, union ends, dual EPDM lubricated O-rings

and TEFZEL characterizing disc.

Combination of actuator and valve shall provide a minimum close-off pressure rating of 200 PSID.

Proportional actuators shall be Multi-Function Technology by Belimo. A separate feedback wire shall be capable of providing a

signal which indicates the valve position and flow rate.

Damper Actuators shall be of the push-pull or rotary type for modulating, floating, control as required by the application. The

actuator shall use a synchronous motor or an electric motor with end switches to de-energize the motor at the end of the stroke

limits. Control voltage shall be 24 VAC, 2-10 VDC, or 4-20 ma as required. Actuators shall be provided with spring return to the

normal position where shown. Actuators shall have a position indicator for external indication of damper position and a manual

override capability.

Control Dampers

All dampers shall be installed by Sheet Metal Contractor and shall be of the louver type, and shall be perfectly balanced and of

parallel or proportioning type construction as required.

All dampers shall be constructed and factory inspected so that the leakage will not exceed 1% under normal operating conditions;

dampers shall be equipped with replaceable butyl rubber seal installed along top, bottom, and sides of the frame and along both

edges of each blade. Dampers shall be low leakage dampers. Submit name of damper manufacturer and descriptive data for

damper with bid.

Sensors

Temperature sensors shall be linear precision elements with ranges appropriate for each specific application.

The sensor shall be of the resistance type, and shall be either two-wire 1000 ohm nickel RTD, or two-wire 1000 ohm platinum

RTD. Water Temperature - + +

Duct Temperature - +

Thermowells for immersion sensors shall be stainless steel or brass as required for application.

Low Temperature Protection Thermostat: Shall be the manual reset type. The thermostat shall operate in response to the coldest

one-foot length of the sensing element. The element shall be properly supported to cover the entire downstream side of the coil.

Separate thermostats shall be provided for each 25 square feet of coil face area. The thermostat shall have a repeatability of +/-

Humidity Sensors shall consist of an electronic measuring circuit and a capacitive humidity sensing element. The electronic

measuring circuit shall convert the sensor's signal to a continuous 0 to 10 VDC or 4 - 20 ma signal which shall correspond to

0-100% relative humidity. The sensor shall be suitable for duct mounting. 24 volt AC control power for the operation of the sensor

shall originate at the DDC control panel. The accuracy shall be +/- 2% over the range of 0 - 95% RH.

Air Flow Monitoring

TEK-AIR Systems Inc., Model IAQ or equal, central airflow monitoring system to directly measure supply ducts, exhaust, return,

outdoor airflow rates. Each airflow monitoring system shall consist of a central processing monitor panel and transducer mounted

in close proximity to air conditioning unit and a requisite number of Series IAQ-Tek airflow and temperature sensing probes located

in supply ductwork serving the auditorium and stage and the outdoor air, return air, and exhaust air ducts and plenums.

IAQ-2000 Outdoor Air Volume Measurement System:

System Accuracy (Velocity for 0.1" transducer): 1000 to 200 fpm: +/- 5% of reading, 200 to 75 fpm: +/- 10% of reading

Probe and Transducer - Operating temperature range: -40 to F., Air Velocity, Discharge of Intake louver - 75 to 750 fpm.,

Free air, before damper - 100 to 1000 fpm.

Probe - Material: PVC/ABS, Fire Rating: UL-94-VO and UL-94-VB, Size: 8.5" Dia., 7.5" depth, Tubing Connections: 1/4" barb

fittings.

Transducer - Enclosure: NEMA 4X watertight, Size: 6" W x 4.75" H x 3.5" D, Tubing Connections: 1/4" barb fittings.

Monitor - Operating temperature range: 30 to F., Enclosure: NEMA 4X watertight, Power Requirement: 24 VAC, 25 VA,

Analog Output: 4 - 20 ma into 0 - 600 ohm, Display: LCD, 4 - 20 lines, backlit.

Quantities and locations of sensors will be as indicated on shop drawings. Sensors will be provided for each duct for outdoor air,

supply air, and return air.

Submittals

Submit manufacturers' specification sheets for each type of equipment to show compliance with the project specification.

Functional Performance Test

The Functional Performance test (FPT) shall be executed by the Contractor and approved by the University.

Demonstrate compliance of the heating, ventilating, and air conditioning control system with the contract documents including

proper labeling of controls and wiring.

Functional Performance testing will include workstation operations, calibration results for input and output devices required by

manufacturer, proper tuning of control loops, and ensuring proper execution of the sequence of operation. Use the BACnet

protocol analyzer during the performance testing to demonstrate communications reliability.

Notify the University when phone lines or network connections are needed at least 30 days prior to installation of the workstation.

Verify integrity/safety of all electrical connections. Verify proper interface with fire alarm system. Verify proper communications

over network segments and between controllers. Co-ordinate with TAB contractor to obtain control settings that are determined

from balancing procedures. Test, calibrate, and set all digital and analog sensing and actuating devices as required. Check

sequences have been installed and tested. Check all alarms are programmed. Check all trends are operating. Check all

schedules are operating. Complete all "as-built" record drawings.

Training

Provide (2) 4 hour sessions of training to the Owner.

Performance Guarantee

In addition to the guarantee on workmanship and materials, the DDC Contractor shall guarantee the successful

6862 Summerfield Drive

Mason, Ohio 45040

JMR Engineering LLC

Phone: 513-515-6739