2012_03_09_MFC_at_Dal_Molin_-_Submittal__1323_(23_34_16.00_42).pdf

MULTIPLE FACILITY COMPLEX, AT DAL MOLIN, VICENZA, ITALY

TRAINING FACILITY BLDG #22

Section 23 34 16.00 42

AIR HANDLING UNITS

SD03 – Product Data

2.3 Packaged air handling units

2.4 Variable air volume (VAV) terminal units

2.5 Series fan powered variable air volume (VAV) terminal units

2.7 Corrosion protection

SD08 – Manufacturer’s Instructions

3.1 Packaged air handling units – installation instruction

3.1 Variable-air-volume (VAV) terminal units – installation instruction

3.1 Series fan powered variable air volume (VAV) terminal units – installation instruction

REV

Revisione

DATE

Data

DESCRIPTION

Descrizione

DRAWN

Redazione

VERIFIED

Verifica

APPROVED

Approvazione

A 8/03/12 Emission B C D

Multiple Facilities Comples, Dal Molin Package C - Training Facility (Bldg. #22)

SECTION 23 34 16.00 42.00 42

AIR HANDLING UNITS

05/02

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

AIR-CONDITIONING AND REFRIGERATION INSTITUTE (ARI)

ARI 430 (1989) Central-Station Air-Handling Units

ITALIAN ELECTROTECHNICAL COMMITTEE (CEI)

CEI 64-8 (1998-01) Electrical installations of buildings (Parts 1 thru 8)

ITALIAN NATIONAL ASSOCIATION FOR UNIFICATION OF STANDARDS (UNI)

UNI 9511/1 (1989) Technical drawings - Representation of installations - Graphical symbols plumbing, heating, ventilation and ducting

UNI 10339 (1995) Air-conditioning systems for thermal comfort in buildings - General, classification and requirements - Offer, order and supply specifications

UNI 10531 (1995) Industrial fans - Performance testing using standardized airways.

UNI 9953 Air-air regenerators in air conditioning plants. Definition and classification, efficiency index and tests

ITALIAN/EUROPEAN HARMONIZATION STANDARDS (UNI EN)(UNI ENV)(CEI

EN)

(UNI EN ISO)

UNI ENV 328 (1993) Heat exchangers - Test procedures for establishing performance of unit air coolers for refrigeration

UNI EN 308 Heat exchangers - Test procedures for establishing performance of air to air and flue gases heat recovery devices

UNI EN 779 (1993/AC:1994) Particulate air filters for general ventilation - Requirements, testing, marking.

UNI EN 1216 (1998) Heat exchangers - Forced circulation air-cooling and air-heating coils - Test procedures for establishing the performance

UNI ENV 1363-3 (2000) Fire resistance tests -

SECTION 23 34 16.00 42 Page 1 N33191-06-C-3229

Verification of furnace performance

UNI EN 1397 (1998) Heat exchanges - Hydronic room fan coil units - Test procedures for establishing the performance

UNI EN 1505 (1997) Ventilation for buildings - Sheet metal air ducts and fittings with rectangular cross section - Dimensions

UNI EN ISO 4535 (1998) Vitreous and porcelain enamels - Apparatus for determination of resistance to hot detergent solutions used for washing textiles.

UNI ISO 5135 (1992) Acoustics - Determination of sound power levels of noise from air terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room

UNI ISO 5136 (1993) Acoustics - Determination of sound power radiated into a duct by fans

- In-duct method.

UNDERWRITERS LABORATORIES INC. (UL)

UL 507 (1999; Bul. 1999 & 2000) Electric Fans

UL 705 (1994; Bul. 1994, R 1996) Power Ventilators

1.2 RELATED REQUIREMENTS

Section 23 03 00.00 42, "Basic Mechanical Materials and Methods," applies to this section with the additions and modifications specified herein.

1.3 SUBMITTALS

Submit the following in accordance with RFP Part 2 General Requirements.

SD-03 Product Data

Packaged air handling units G

Centrifugal fans G

Variable-air-volume (VAV) terminal units G

Series fan powered variable air volume (VAV) terminal units G

Corrosion protection

SD-07 Certificates

Certificate of Coating Specification Compliance

Certificate of Readiness Submit a Certificate of Readiness stating that all equipment, systems, and controls are now complete and ready for functional performance testing to begin. Completed pre-start and startup checklists, signed by the responsible parties including the

SECTION 23 34 16.00 42 Page 2

Commissioning Agent, shall support the certificate. The TAB (Testing Adjusting Balancing) field work shall not commence until the start-up checklists have been completed and signed.

Final system performance verification testing of the TAB and controls will not be conducted until the Certificate of Readiness is submitted to the Contracting Officer. Piping welding procedures, performance qualifications, and list of welder's names and symbols. Submit per IIS (Italian Institute of Welding) and UNI EN ISO 15614, UNI EN ISO 15613.Independent Testing, Adjusting and Balancing (TAB) agency personnel qualifications.

SD-08 Manufacturer's Instructions

Packaged air handling units - installation instructions

Variable-air-volume (VAV) terminal units - installation instructions

Series fan powered variable air volume (VAV) terminal units -installation instructions

SD-09 Manufacturer's Field Reports

Packaged air handling units - field test plan; equipment greater than 944 L/S.

Packaged air handling units - field acceptance test report;

equipment greater than 944 L/S.

SD-10 Operation and Maintenance Data

Packaged air handling units, Data Package 3

Centrifugal fans, Data Package 3

Variable-air-volume (VAV) terminal units, Data Package 2

Series fan powered variable air volume (VAV) terminal units

Submit operation and maintenance data in accordance with RFP Part 2 General Requirements.

PART 2 PRODUCTS

All air conditining equipment will be Energy Star compliant where applicable, or shall meet or exceed the energy efficiency recommended by Energy Star.

2.1 SOURCE MANUFACTURERS

2.1.1 Air Handling Units

The following manufacturers make air handling unit components and systems that generally comply with these specifications:

CARRIER S.p.A.

Via R. Sanzio, 9 20058 Villasanta (MI) Tel: 039/36361 Fax: 039/3636432

SABIANA S.p.A.

Via Poave, 53

SECTION 23 34 16.00 42 Page 3 N33191-06-C-3229 marcor Text Box

20011 Corbetta (MI) Tel: 02/9777021 Fax: 02/9777281

TRANE ITALIA S.r.l.

Via Enrico Fermi, 21/23 20090 Assago (MI) Tel: 02/457951 Fax: 02/4880170

WOODS ITALIANA S.p.A.

Via Monte Nero, 55 20092 Cinisello Balsamo (MI) Tel: 02/6172591 Fax: 02/6185992

2.2 FANS

Total sound power level of the fan shall not exceed 90 dBA when tested per UNI ISO 5136; statically and dynamically balanced. Fan bearing life shall have a minimum average life of 200,000 hours at design operating conditions. Construct housings and impellers of steel, except as specified otherwise. For wiring terminations, provide terminal lugs to match branch circuit conductor quantities, sizes, and materials.

Enclose terminal lugs in terminal box sized to CEI 64-8.

Scheduled fan performance is the performance required under indicated installation conditions. Equipment shall be rated for these conditions.

Fan shafts shall be solid steel, ground and finished as required for the service indicated, with the first critical speed a minimum 25 percent higher than cataloged fan speed. Vibration isolation mountings shall be spring type and shall limit vibration transmissibility to a maximum 5 percent of the unbalanced force at the lowest equipment speed, unless otherwise specified or indicated.

2.2.1 Centrifugal Fans

UNI 10531. EUROVENT Certified with EUROVENT Seal, Impeller shall be constructed of steel with smooth curved rim, back plate, blades, and cast iron or cast steel hub riveted to back plate and keyed to shaft with set screws.Provide centrifugal type exhaust fans with aluminum housing, fan wheel, and bird screen. Provide nominal 2 mesh 1.60 mm wire diameter,stainless steel bird screens for outdoor inlets . Motors shall be completely shielded from the airstream. Provide exhaust opening and gravity closing type automatic backdraft dampers. Provide roof curb for roof mounted exhaust fans as recommended by fan manufacturer. Provide with disconnect and speed controller.

2.3 PACKAGED AIR HANDLING UNITS

ARI 430 with sound rating in accordance with UNI ISO 5135, single- zone type, sound power level, and static pressure, as indicated. Include damper section, supply blower section, filter section with mixing box section or combination filter-mixing box section, and coil or heater section. Filters, housing coils, and heaters must be completely removable from the unit without having to dismantle the unit or adjacent equipment.

2.3.1 Casings

Construct casings of double wall steel, galvanized steel, or aluminum on channel base coated externally with manufacturers standard paint finish. Provide removable panels and access doors for inspection and access to internal parts. Insulate casings with manufacturer's standard

SECTION 23 34 16.00 42 Page 4 N33191-06-C-3229

50mm mimumum casing insulation.materials. For outdoor roof mounted units, provide weatherproof casing in accordance with paragraph entitled "Testing for Corrosion Protection." Finish with seal joints, stationary galvanized steel louvers with bird screen, and bearing UNI ISO 5135.

2.3.2 Dampers

Provide with factory mounted outside and return air dampers in mixing boxes of galvanized steel blades, with vinyl bulb edging and edge seals in galvanized frame, in parallel blade arrangement with non-slip keyed connecting rods and linkages. Permanently secure damper blades on a single shaft with self-lubricating oil impregnated bronze bearings.

Position damper blades across short air opening dimension. Maximum leakage is 2 percent at 1000 Pa gage differential pressure when sized for 10 m/s face velocity.

2.3.3 Supply Fans

2.3.3.1 Double Width Double Inlet (DWDI), Housed Centrifugal Type

a. Fans shall deliver performance specified in the air handling unit schedule and shall be UNI 10531 DWDI. Fan wheels shall be backward inclined or backward inclined air foil type. At rated capacity, the unit shall not exceed sound power levels and surrounding space NC levels as specified in the air handling unit schedule.

b. Fan wheel diameters shall be in accordance with the standard sizes adopted for non-overloading fans. Inlets shall be fully streamlined. Blades shall be welded to backplate and welded to wheel cone. Wheels shall be statically balanced prior to assembly and dynamically balanced as an assembly at the factory at design RPM prior to shipment. Fans shall be balanced at design RPM to a total displacement of less than 1 mil measured at each bearing pad prior to shipment with belts and drives in place.

c. Fan shafts shall be solid steel machined to standard diameters and tolerances for turned, ground and polished shafts. Center shall be provided at one end of shaft for tachometer reading.

Fan shaft shall be designed to be a minimum of 29 percent below critical speed at design RPM. Fan wheels and drive sheaves shall be key-seated to fan shaft.

d. Fan bearings shall be of spherical roller type mounted in self-alignment split pillow blocks and pre-lubricated with No. 2 consistency lithium base grease. Bearings shall be minimum 200,0000 hour L-50 average life. Lube line shall be extended to drive side of unit near access door. Positive locking to shaft shall be provided by means of a tapered adapter, lock nut and lockwasher. Bearings shall be installed to close tolerances at the factory and shall require no field adjustments.

e. All bushings, sheaves and belts necessary for fans to achieve design performance shall be factory selected and installed. All drives shall be sized for a service factor of 1.5 (minimum) times the fan motor horsepower. Multiple groove V belts consisting of matched belts permanently tied together with a tie-band shall be supplied. Provide variable pitch adjustable sheave for motor with scheduled fan speed at mid-point. Provide one spare set of v-belts for each fan.

f. The fan assembly, complete with motor and drive, shall be mounted on a heavy steel base completely isolated from air

SECTION 23 34 16.00 42 Page 5 handling unit casing. Seismically restrained spring type vibration isolators (5 cm deflection) shall be provided to support the fan assembly and isolate all rotating parts. All spring isolators shall be capable of 30 percent over travel before becoming solid and shall be designed stable for a minimum KX/KY (horizontal to vertical spring rate) of 1.0. Provide flexible fan connection and snubber springs at fan discharge.

2.3.3.2 Single Width Single Inlet (SWSI), Plug Type Supply Fans

a. Fans shall deliver performance specified in the air handling unit schedule and shall be UNI 10531 air foil plug type accepted. Fan wheels shall operate to pressurize an acoustical plenum to provide uniform discharge velocity profiles and to allow even face velocities across and through the cooling coil.

At rated capacity, the unit shall not exceed sound power levels and surrounding space NC levels as specified in the air handling unit schedule.

b. Backward inclined air foil blade wheel diameters shall be in accordance with the standard sizes adopted for non-overloading fans. Inlets shall be fully streamlined. Blades shall be welded to backplate and welded to wheel cone. Wheels shall be statically balanced prior to assembly and dynamically balanced as an assembly at the factory at design RPM prior to shipment.

Fans shall be balanced at design RPM to a total displacement of less than one mil measured at each bearing pad prior to shipment with belts and drives in place.

c. Fan shafts shall be solid steel machined to standard diameters and tolerances for turned, ground and polished shafts. Center shall be provided at one end of shaft for tachometer reading.

Fan shaft shall be designed to be a minimum of 29 percent below critical speed at design RPM. Fan wheels and drive sheaves shall be key-seated to fan shaft.

d. Fan bearings shall be of spherical roller type mounted in self-alignment split pillow blocks and pre-lubricated with No. 2 consistency lithium base grease. Bearings shall be minimum 200,000 hour L-50 average life. Lube line shall be extended to drive side of unit near access door. Positive locking to shaft shall be provided by means of a tapered adapter, lock nut and lockwasher. Bearings shall be installed to close tolerances at the factory and shall require no field adjustments.

e. All bushings, sheaves and belts necessary for fans to achieve design performance shall be factory selected and installed. All drives shall be sized for a service factor of 1.6 (minimum) times the fan motor horsepower. Multiple groove V belts consisting of matched belts permanently tied together with a tie-band shall be supplied. Provide variable pitch adjustable sheave for motor with scheduled fan speed at mid-point.

f. The fan assembly, complete with motor and drive, shall be mounted on a heavy steel base. Open spring type vibration isolators (5 mm deflection) shall be provided which support the fan assembly and isolate all rotating parts. All spring isolators shall be capable of 30 percent over travel before becoming solid and shall be designed stable for a minimum KX/KY (horizontal to vertical spring rate) of 1.0.

g. Plug fan modules shall be provided with an expanded metal door guard to prevent unauthorized entry to the fan module.

SECTION 23 34 16.00 42 Page 6

2.3.4 Vibration Isolation

For the entire fan, motor, and drive assembly, provide 50 mm nominal deflection spring vibration isolators, internally mounted at the factory together with fan discharge flexible connection and thrust restraint springs. As an alternate, vibration isolation may be provided external to air handlers. When alternate is chosen, provide 50 mm nominal deflection springs, pipe and duct flexible connections, thrust restraint springs, and spring type pipe hangers on pipes directly-connected to such air handlers.

2.3.5 Filter Sections

Protect permanent holding frames with rust inhibitor coating. Provide visible identification on media frames showing model number and air-flow direction. provide means of sealing to prevent bypass of unfiltered air. Except extended media with self-supporting cartridge and high efficiency particulate filters, performance shall be determined in accordance with UNI EN 779. Provide inclined-type manometers for filter stations of 944 liter per second (L/s) capacity or more, including filters furnished as integral parts of air-handling units. Manometers with 3 mm graduations and spirit level shall be of sufficient length to read at least 76 mm water gage. Equip with over-pressure safety traps and three-way vent valves.

2.3.5.1 Replaceable Air Filters

UNI EN 779, those which, when clean, do not contribute fuel when attacked by flame and emit only negligible amount of smoke , throw-away frames and media , 50 mm nominal thickness, and size as indicated.

2.3.5.2 Disposable Cartridge Air Filters

UNI EN 779, and factory assembled. Provide filter media of cotton and synthetic fibers having 35 to 40 or 80 to 85 percent average dust spot efficiencies as noted below with maximum final resistance 250 Pa gage and maximum face velocity 3 m/s. Construct filter frame of 1.519 mm sheet steel or 1.60 mm aluminum with welded or riveted joints. Calk or gasket entire assembly to prevent air leakage around frames.

2.3.5.3 Extended Media (Pleated) Air Filters

UNI EN 779 , permanent holding frame and filter housing with factory-assembled side access:

a. Pre-Filter: Externally supported cartridge.

Efficiency: 30 percent rated.

Pre-Filter Track: Required.

b. After-Filter: Externally supported cartridge.

Efficiency: 85 percent rated.

2.3.5.4 Filter Housing

Minimum thickness, 1.897 mm thick steel with baked finish inside and out. Joints shall be continuously welded. Flange shall have a fixed air sealing gasket with hollow cross section, closed cell rubber or resilient neoprene, suitable for repetitive reuse. Cabinets shall have flanged ends for connection to adjacent ducts. Hinged access doors on both cabinet sides. Provide access doors with fixed air sealing gaskets to be airtight at the static pressure expected in service. Provide two 10 mm flare connection test ports complete with seal cap, one on each side of the filter. Weld test ports into each filter cabinet or plenum.

Test port shall not penetrate to filter frame or media.

SECTION 23 34 16.00 42 Page 7

2.3.6 Mixing Boxes

Include equally sized openings, sized to individually handle full air flow capacity. Provide automatic dampers.

2.3.7 Outside-Air Intake

Provide each roof top unit with a unit-mounted louver, built-in rain lip, and bird screen.

2.3.8 Heating and Cooling Sections

2.3.8.1 Coils

Provide removable coils per UNI ENV 328, UNI EN 1216 with access to both sides. Enclose heating and cooling coils in a common or individual casing with headers and return bends fully contained within casing.

Cooling coils shall have drain pans with threaded piping connections to remove condensate. Drains pans shall be insulated adequately with water impervious insulation to prevent condensation on its surace. Seal coils to casing to prevent leakage of air around coils.

2.3.8.2 Eliminators

Equip each cooling coil having an air velocity of over 2 m/s through the net face area with moisture eliminators, unless the coil manufacturer guarantees, over the signature of a responsible company official, that no moisture will be carried beyond the drip pans under actual conditions of operation. Construct of minimum 0.635 mm stainless steel, removable through the nearest access door in the casing or ductwork. Eliminators shall have not less than two bends at 0.785 rad and shall be spaced not more than 63 mm center-to-center on face. Each bend shall have an integrally formed hook.

2.3.8.3 Drip Pans

Provide each cooling coil section in both field-and-factory assembled casings with a 1.270 mm stainless steel drip pan with threaded drain connections. Drip pans shall collect, confine, and dispose of all condensate from cooling coils and attachments, including headers, return bends, distributors, and uninsulated pipe and fittings. Where individual eliminator blades are in section (not in one piece from top to bottom of coil bank), provide auxiliary drip troughs at bottom of each section with drains to drip pans. Insulate drip pans with water impervious insulation of sufficient thickness to prevent condensate formation on the exterior at ambient conditions to be encountered.

2.3.9 Ultraviolet Disinfection System

For central station air handling units provide a UVC (ultra violet c-band) disinfection system for mold, bacteria and odor control in each air handler that has a chilled water cooling coil.

Irradiation-emitters and fixtures are to be installed in sufficient quantity and in such an arrangement so as to provide an equal distribution of UVC energy on the coil and in the drain pan. To maintain energy efficiency, the UVC energy produced shall be of the lowest possible reflected and shadowed losses. Energy Efficiency - Power supplies shall be of the high efficiency electronic type and matched to the emitter.

Intensity - The minimal UVC energy striking the leading edge (if installed upstream) or trailing edge (if installed downstream) of all

SECTION 23 34 16.00 42 Page 8 the coil fins shall not be less than 820 uW/cm2 at the closest point and through placement, not less than 60 percent of that value at the farthest point. Equal amounts are to strike the drain pan, either directly or indirectly through reflection.

Installation: Emitters and fixtures shall be installed at right angles to the conforming lines of the coil fins, such that through incident angle reflection, UVC energy bathes all surfaces of the coil and drain pan as well as all of the available line of sight airstream. One complete set of spare bulbs will be supplied.

2.3.10 Energy Recovery Section

Energy Recovery Module cabinet shall be constructed of heavy gauge double wall galvanized steel and be internally insulated to prevent condensation of water vapor on external or internal surfaces.

Energy recovery wheel shall be mounted in a slide out cassette. A wheel drive motor having permanently sealed ball bearings shall be provided with a plug-in connection to a receptacle mounted within the cabinet.

Wheel shall be of the enthalpy type for both sensible and latent heat recovery and be designed to insure laminar flow. Energy transfer ratings must be conducted per UNI EN 308, UNI 9953 with certification seal. Ratings without certification are not acceptable. Desiccant shall be silica gel for maximum latent energy transfer. Wheel shall be constructed of lightweight polymer media to minimize shaft and bearing loads. Polymer media shall be mounted in a stainless steel rotor for corrosion resistance.

Wheel design shall consist of removable segments for ease of service and/or cleaning. Silica gel desiccant shall be permanently bonded to wheel media to retain latent heat capability after cleaning. Wheels with sprayed on desiccant coatings are not acceptable. Wheels with desiccant applied after wheel formation are not acceptable. Energy recovery device.

2.4 VARIABLE-AIR-VOLUME (VAV) TERMINAL UNITS

Sound power level, capacities, static pressures, and other operating conditions as indicated. Include sound-attenuator boxes, variable-volume dampers, adjustable maximum air-volume regulators, and other items for system operation. Equip units with integral air-volume control dampers. Thermostats may be mounted in the units if room air is induced over the thermostats. Maximum air-leak rate shall be 2 percent at static pressures from 100 to 750 Pa gage. Furnish units with round primary damper or valve, and VAV Terminal unit mounting brackets.

2.4.1 Casings

Minimum 0.559 mm galvanized steel or minimum one mm thick aluminum, welded construction. Provide removable access panels that open the entire VAV terminal unit bottom to access where required for inspection, adjustment, and maintenance of internal components without disconnecting ducts.

2.4.2 Insulation

UNI 10339 and UNI 9511/1 for 2 hour fire-rated classification with minimum 13 mm 682 grams glass fiber. Acoustically and thermally insulate internal surfaces of units, air diffusers, and accessories.

Surface coat the insulation to prevent erosion.

SECTION 23 34 16.00 42 Page 9

2.4.3 Controls

Requirements for controls are specified in Prescriptive Section 15910-N, "Direct Digital Control Systems BACNET."

2.4.4 Air-Volume Regulators

Static-pressure-compensated or velocity-pressure type. At any damper position, maintain constant-volume L/s within plus-or-minus 5 percent of design-rated L/s setting. Provide factory-fabricated and field-adjustable set-points to set maximum and minimum L/s.

2.4.5 Air Diffusers

Fixed type. Construct diffusers to operate without loss of Coanda effect.

2.4.6 Reheat Coils

2.4.6.1 Water Coils

One-row or two-row hot water coils for 20 degrees Ctemperature differential, with entering water temperature at 80 degrees C. On reduction in cooling loads, the air supply quantity shall be gradually reduced to a fixed minimum setting. Then, the reheat coil shall be activated in sequence to maintain thermostat setting.

2.5 SERIES FAN POWERED VARIABLE AIR VOLUME (VAV) TERMINAL UNITS

Units shall provide a supply air discharge mix by modulation of conditioned primary air and recirculating of return air. Units shall include casing, centrifugal fan and motor, primary VAV damper or valve, electronic volume regulator, discharge air damper, primary air inlet cone with high and low pressure flow sensors, recirculating air filter frames, filter, and electrical disconnect. Provide hot water heating coils.

a. Casing: Provide removable full bottom access panels for servicing internal components without disturbing duct connections. Insulate inside of casing with manufacturer's standard insulation. Units shall have recirculating air inlet equipped with filter frame, round primary damper or valve, and unit mounting brackets.

b. Fans and motors: Provide centrifugal, forward curved, multiblade, fan wheels with direct-drive motors. Motors shall be high efficiency permanent-split capacitor type with thermal overload protection and permanently lubricated bearings. Motors shall have three speeds or be equipped with solid state speed controllers. Provide isolation between fan motor assembly and unit casing. Fan and motor shall be removable through casing access panel.

c. Flow sensor: Sensor shall be ring or cross type with minimum of two pickup points which average the velocity across the inlet. Flow measurement shall be within plus or minus 5 percent of rated airflow with 1.5 diameters of straight duct upstream of unit and inlet static variation of 124 to 1240 Pa (gage) Flow measuring taps and calibration flowchart shall be supplied with each unit for field balancing airflows.

d. Primary VAV damper or valve: Galvanized steel damper blade shall close against gasket inside unit. Connect damper to operating shaft with a positive mechanical connection. Provide

SECTION 23 34 16.00 42 Page 10 nylon bearing for damper shaft. Cylindrical die cast aluminum valve inlet tapered to fit round flexible ducts with integral flow diffuser and beveled self-centering disc. Damper or valve leakage at shutoff shall not exceed 2 percent of capacity at 249 Pa (gage) pressure.

e. Regulator: Volume regulator shall be electronic. Provide electronic controls contained enclosure sealed from airflow.

Controls shall be mounted on side of unit or on air valve.

System powered regulators shall not be permitted. Volume regulator shall reset primary air volume as determined by thermostat, within upstream static pressure variation noted in paragraph entitled "Flow Sensor." Volume regulators shall be field adjustable and factory set and calibrated to indicated maximum and minimum primary airflows. Volume regulators shall be direct acting and normally open upon loss of pneumatic pressure.

f. Electrical: Unit shall incorporate single point electrical connection with electrical disconnect. Electrical components shall be mounted in control box. Units, when factory assembled as as a unit do not require airflow switch interlock with electric heating coil .

g. Filters: Provide UL listed throwaway 25 mm thick fiberglass filters, standard dust-holding capacity.

2.6 ELECTRICAL

2.6.1 Electrical Motors, Controllers, Contactors, and Disconnects

Furnish with respective pieces of equipment. Motors, controllers, contactors, and disconnects shall conform to Section 26 20 00.00 42, "Interior Distribution System." Provide electrical connections under Section 26 20 00.00 42, "Interior Distribution System." Provide controllers and contactors with maximum of 200 volt control circuits, and auxiliary contacts for use with controls furnished. When motors and equipment furnished are larger than sizes indicated, the cost of providing additional electrical service and related work shall be included under this section. Provide variable frequency drive (VFD) systems in compliance with Section 26 29 23.00 42, "Variable Frequency Drive Systems Under 600 Volts."

2.6.2 Electrical Work

Provide under Section 26 20 00.00 42, "Interior Distribution System."

Provide control wiring under Section 15910n, "Direct Digital Control Systems - BACNET."

2.7 FINISH COATING FOR AIR HANDLING UNIT CASINGS

Comply with UNI EN ISO 4535, except as supplemented and modified by this specification. Protect equipment with a corrosion-inhibiting coating or paint system that has proved capable of satisfactorily withstanding corrosion in accordance with UNI EN ISO 4535. The manufacturer shall submit documentation that his standard cataloged products have met the following coating test requirements: Test 125 hours for equipment installed indoors and 500 hours for equipment installed outdoors or subjected to a marine atmosphere. Upon completion of exposure, evaluate coating or painting in accordance with UNI EN ISO 4535. Coat or paint shall show no indication of deterioration, loss of adhesion, or indication of rust or corrosion extending further than 3 mm on either side of original scratch.

SECTION 23 34 16.00 42 Page 11

PART 3 EXECUTION

3.1 INSTALLATION

Installation of air handling equipment including materials, installation, workmanship, fabrication, assembly, erection, examination, inspection, and testing shall be in compliance with the manufacturer's written installation instructions, including the following:

Packaged air handling units - installation instructions

Variable-air-volume (VAV) terminal units - installation instructions

Series fan powered variable air volume (VAV) terminal units -installation instructions

3.2 FIELD QUALITY CONTROL

Upon completion and before final acceptance of work, test each system in service to demonstrate compliance with the contract requirements.

Adjust controls and balance systems prior to final acceptance of completed systems. Test controls through every cycle of operation.

Test safety controls to demonstrate performance of required function.

Correct defects in work provided by Contractor and repeat tests.

Furnish steam, fuel, water, electricity, instruments, connecting devices, and personnel for tests. Flush and clean piping before placing in operation. Clean equipment, piping, strainers, ducts, and filters.

3.2.1 Equipment

3.2.1.1 Field Testing

Test each item of equipment in operation for continuous period of not less than 24 hours under every condition of operation in accordance with each equipment manufacturer's recommendation. Verify that the equipment operating parameters are within limits recommended by the manufacturer.

3.2.1.2 Field Acceptance Test Plans

a. Manufacturer's Test Plans: Within 120 calendar days after contract award, submit the following plans:

(1) Packaged air handling units field test plan; equipment greater than 944 L/S.

Field test plans shall developed by the equipment manufacturer detailing recommended field test procedures for that particular type and size of equipment. Field test plans developed by the installing Contractor, or the equipment sales agency furnishing the equipment, will not be acceptable.

The Contracting Officer will review and approve the field test plan for each of the listed equipment prior to commencement of field testing of the equipment. The approved field test plans shall be the plan and procedures followed for the field acceptance tests of the equipment and test reporting.

b. Coordinated testing: Indicate in each field test plan when work required by this section requires coordination with test work required by other specification sections. Furnish test procedures for the simultaneous or integrated testing of equipment controls which interlock and interface with controls factory prewired or external controls for the equipment provided.

SECTION 23 34 16.00 42 Page 12

c. Prerequisite testing: Equipment for which performance testing is dependent upon the completion of the work covered by Prescriptive Section 23 08 00.00 20, "HVAC Testing/Adjusting/Balancing" must have that work completed as a prerequisite to testing work under this section. Indicate in each field test plan when such prerequisite work is required.

d. Test procedure: Indicate in each field test plan each equipment manufacturers published installation, start-up, and field acceptance test procedures. Include in each test plan a detailed step-by-step procedure for testing automatic controls provided by the manufacturer.

Each test plan shall include the required test reporting forms to be completed by the Contractor's testing representatives.

Procedures shall be structured to test the controls through all modes of control to confirm that the controls are performing with the intended sequence of control.

Controllers shall be verified to be properly calibrated and have the proper set point to provide stable control of their respective equipment.

e. Performance variables: Each test plan shall list performance variables that are required to be measured or tested as part of the field test.

Include in the listed variables performance requirements indicated on the equipment schedules on the design drawings.

Manufacturer shall furnish with each test procedure a description of acceptable results that have been verified.

Manufacturer shall identify the acceptable limits or tolerances within which each tested performance variable shall acceptably operate.

f. Job specific: Each test plan shall be job specific and shall address the particular item of equipment and particular conditions which exist with this contract. Generic or general preprinted test procedures are not acceptable.

g. Specialized components: Each test plan shall include procedures for field testing and field adjusting specialized components, such as hot gas bypass control valves, or pressure valves.

3.2.1.3 Equipment Field Acceptance Testing

a. Equipment Requiring Test Reports: Each piece of equipment listed as requiring a field acceptance test plan shall be field acceptance tested in compliance with that plan and the resulting following field acceptance test reports submitted for approval:

1. Packaged air handling units - field acceptance test report;

equipment greater than 944 L/S.

b. Manufacturer's recommended testing: Conduct the manufacturer's recommend field testing in compliance with the approved test plan. Furnish a factory trained field representative authorized by and to represent the equipment manufacturer at the complete execution of the field acceptance testing.

c. Operational test: Conduct a continuous 24 hour operational test

SECTION 23 34 16.00 42 Page 13 for each item of equipment. Equipment shutdown before the test period is completed shall result in the test period being started again and run for the required duration. For the duration of the test period, compile an operational log of each item of equipment. Log required entries every two hours. Use the test report forms for logging the operational variables.

d. Notice of tests: Conduct the manufacturer's recommended tests and the operational tests; record the required data using the approved reporting forms. Notify the Contracting Officer in writing at least 15 calendar days prior to the testing. Within 30 calendar days after acceptable completion of testing, submit each test report for review and approval.

e. Report forms: Type data entries and writing on the test report forms. Completed test report forms for each item of equipment shall be reviewed, approved, and signed by the Contractor's test director and the QC manager. The manufacturer's field test representative shall review, approve, and sign the report of the manufacturer's recommended test. Signatures shall be accompanied by the person's name typed.

f. Deficiency resolution: The test requirements acceptably met;

deficiencies identified during the tests shall be corrected in compliance with the manufacturer's recommendations and corrections retested in order to verify compliance.

3.2.2 Testing and Balancing

Requirements for testing, adjustment, and balancing, including duct air leakage testing, are specified in Prescriptive Section 23 08 00.00 20, "HVAC Testing, Adjusting, and Balancing".

-- End of Section --

SECTION 23 34 16.00 42 Page 14

MULTIPLE FACILITY COMPLEX, AT DAL MOLIN, VICENZA, ITALY

TRAINING FACILITY BLDG #22

Section 23 34 16.00 42

AIR HANDLING UNITS

SD03 – Product Data

2.3 Packaged air handling units

N A V A L F A C

IL

IT

IE

S E U R O P E S O U T H W E S T A S

IA

M U L T

IP

L E F A C

IL

IT

IE

S C O M P L E X

T R A

IN

IN

G F A C

IL

IT

Y B L D G

Rectangle

Comments to AHU specifications

2.3.3.1c

Tachometer on fan shaft

Indication 89/392/CEE (“Direttiva Macchine”) on art. 2.6 states that the installer must follow the manufacurer’s recommendations for safety of the operator. In our case, tachometer can’t be applied on fan shaft because fan must stop when the access door is open.

2.2

Sound power level

Sound power level in duct will be tested after the field test (not official final test). If noise values will are higher than the value indicated in the RFP, sound attenuators will be provided.

Bearing Life

Bearing life is determined in accordance with methods pre- scribed in ISO 281/1-1989 or the Anti Friction

Bearing Manufac- turers Association (AFBMA) Standards 9 and 11, modified to follow the ISO standard. The life of a rolling element bearing is defined as the number of operating hours at a given load and speed the bearing is capable of enduring before the first signs of failure start to occur. Since seemingly identical bearings under identical operating conditions will fail at different times, life is specified in both hours and the statistical probability that a certain percentage of bearings can be expected to fail within that time period.

Example:

A manufacturer specifies that the bearings supplied in a particular fan have a minimum life of L-10 in excess of 40,000 hours at maximum cataloged operating speed. We can interpret this specification to mean that a minimum of 90% of the bearings in this application can be expected to have a life of at least 40,000 hours or longer.To say it another way, we should expect less than 10% of the bearings in this application to fail within 40,000 hours.

L-50 is the term given to Average Life and is simply equal to 5 times the Minimum Life. For example, the bearing specified above has a life of L-50 in excess of 200,000 hours. At least 50% of the bearings in this application would be expected to have a life of 200,000 hours or longer.

Line marcor Oval marcor

EUROVENT

Sede Legale: Trane Italia srl – 20148 Milano – Via Rubens, 19 Società a Socio Unico – cciaa MI 1011684 – capitale sociale interamente versato € 49.400 – reg. imp. MI 04429100151 – cod.fisc./p.IVA

04429100151

REIV – Agenzia Trane Italia srl) Via Principe Amedeo, 49/b

35042 ESTE (PD)

Tel +39 04299.601.618 Fax +39 .0429 601.446 E-mail : reivv@tin.it

Spett.le GEMMO SpA Cantiere Dal Molin

VICENZA

29.04.2011

Oggetto : Centrali di trattamento aria CCTA/ Air Handling Units

Vi confermiamo che il calcolo delle batterie di raffreddamento e riscaldamento delle centrali di trattamento aria, è basato sul rispetto dei trattamenti indicati e cioè la temperatura dell’aria fredda e calda all’uscita dello scambiatore.

Eventuali differenze nel n° dei ranghi e valori del le capacità termiche tra calcolo indicato nelle schedule e quanto indicato negli elaborati progettuali è dovuto alla differenti geometrie dei tubi che si possono adottare es. 60x30, 30x30, ecc.

Ahu cooling and heating coil calculations respect cold and hot air temperature values on exchanger outside.

A different rows numbers and thermal capacity between product data schedules and design drawings is caused by several pipe type (e.g.: 60x30, 30x30, …)

Cordiali saluti

R E I V ing. G. Bertolini

Spett.le GEMMO SpA Cantiere Dal Molin VICENZA

REIV – Agenzia Trane Italia srl) Via Principe Amedeo, 49/b

35042 ESTE (PD)

Tel +39 04299.601.618 Fax +39 .0429 601.446 E-mail : reivv@tin.it

06.03.2012

Oggetto : Centrali di trattamento aria CCTA/ Air Handling Units

Vi confermiamo che le efficienze dei motori delle centrali di trattamento aria (eff 1- IE2) rispettano la direttiva n. 640 del 2009.

We confirm that the motor’s efficiencies of air handling units comply with the Directive n. 640 of 2009.

Cordiali saluti

R E I V ing. G. Bertolini

Sede Legale: Trane Italia srl – 20148 Milano – Via Rubens, 19 Società a Socio Unico – cciaa MI 1011684 – capitale sociale interamente versato € 49.400 – reg. imp. MI 04429100151 – cod.fisc./p.IVA

04429100151

REGOLAMENTO (CE) N. 640/2009 DELLA COMMISSIONE

del 22 luglio 2009 recante modalità di applicazione della direttiva 2005/32/CE del Parlamento europeo e del Consiglio in merito alle specifiche per la progettazione ecocompatibile dei motori elettrici

(Testo rilevante ai fini del SEE)

LA COMMISSIONE DELLE COMUNITÀ EUROPEE,

visto il trattato che istituisce la Comunità europea, vista la direttiva 2005/32/CE del Parlamento europeo e del Consiglio, del 6 luglio 2005, relativa all’istituzione di un quadro per l’elaborazione di specifiche per la progettazione ecocompa tibile dei prodotti che consumano energia e recante modifica della direttiva 92/42/CEE del Consiglio e delle direttive 96/57/CE e 2000/55/CE del Parlamento europeo e del Consi glio ( 1 ), in particolare l’articolo 15, paragrafo 1, sentito il forum consultivo sulla progettazione ecocompatibile dei prodotti, considerando quanto segue:

(1) Ai sensi della direttiva 2005/32/CE la Commissione è tenuta a fissare specifiche per la progettazione ecocom patibile dei prodotti che consumano energia che rappre sentano un significativo volume di vendite e di scambi commerciali, che hanno un significativo impatto ambien tale e notevoli potenzialità di miglioramento, senza che tali specifiche comportino costi eccessivi.

(2) L’articolo 16, paragrafo 2, primo trattino, della direttiva 2005/32/CE stabilisce che, secondo la procedura di cui all’articolo 19, paragrafo 3, e i criteri di cui all’articolo 15, paragrafo 2, e previa consultazione del forum consultivo sulla progettazione ecocompatibile, la Commissione introduce, se del caso, una misura di ese cuzione riguardante i prodotti usati nei sistemi a motore elettrico.

(3) I motori elettrici rappresentano il principale tipo di carico elettrico delle industrie all’interno della Comunità, dove i motori sono impiegati nei processi di produzione. I si stemi nell’ambito dei quali operano tali motori rappre sentano il 70 % circa dell’elettricità consumata dall’indu stria. Le potenzialità complessive di miglioramento dell’efficienza energetica di questi sistemi in modo eco nomicamente efficace sono quantificate nel 20-30 % cir

ca. Uno dei principali fattori alla base di tali migliora menti è l’impiego di motori efficienti sotto il profilo energetico. Ne consegue pertanto che i motori dei sistemi a motore elettrico sono un prodotto prioritario per il quale devono essere istituite specifiche per la progetta zione ecocompatibile.

(4) I sistemi a motore elettrico comprendono vari prodotti che consumano energia, ad esempio motori, variatori, pompe o ventilatori. I motori e i variatori di velocità sono componenti importanti di tali prodotti. Per questo il presente regolamento richiede che alcuni tipi di motori siano muniti di variatori di velocità.

(5) Molti motori sono integrati in altri prodotti senza essere immessi in commercio o messi in servizio separatamente ai sensi dell’articolo 5 della direttiva 2005/32/CE e dell’articolo 5 della direttiva 2006/42/CE del Parlamento europeo e del Consiglio ( 2 ). Per realizzare tutto il rispar mio energetico potenziale all’insegna dell’efficienza dei costi, i motori integrati in altri prodotti devono essere soggetti alle disposizioni del presente regolamento.

(6) La Commissione ha effettuato uno studio preparatorio per analizzare gli aspetti tecnici, ambientali ed economici connessi ai motori elettrici. Lo studio è stato realizzato in cooperazione con le parti in causa e le parti interessate dell’UE e dei paesi terzi e i suoi risultati sono stati resi pubblici.

(7) Lo studio preparatorio dimostra che i motori elettrici sono immessi sul mercato comunitario in ingenti quan tità e il loro consumo energetico in fase di utilizzo rap presenta l’aspetto ambientale più significativo di tutte le fasi del ciclo di vita, con un consumo annuo di elettricità di 1 067 TWh nel 2005, pari all’emissione di 427 Mt di CO 2 . In assenza di misure di contenimento, si prevede che il consumo energetico aumenterà fino a raggiungere 1 252 TWh nel 2020. Lo studio ha concluso che il con sumo energetico durante il ciclo di vita e il consumo di elettricità nella fase di utilizzo possono migliorare sensi bilmente, in particolare se i motori impiegati in applica zioni a velocità e carico variabili sono dotati di variatori.

(8) Lo studio preparatorio mostra che il consumo di energia in fase di utilizzo è l’unico parametro di progettazione ecocompatibile significativo riguardante la progettazione dei prodotti indicato all’allegato I, parte 1, della direttiva

2005/32/CE.

(9) Il consumo di elettricità dei motori elettrici può essere ridotto utilizzando tecnologie esistenti, non brevettate ed economicamente convenienti, che consentono nel con tempo di ridurre i costi totali sostenuti per l’acquisto e l’uso dei dispositivi.

IT L 191/26 Gazzetta ufficiale dell’Unione europea 23.7.2009

( 1 ) GU L 191 del 22.7.2005, pag. 29. ( 2 ) GU L 157 del 9.6.2006, pag. 24.

marcor Rectangle marcor

DIRECTIVE N. 640/2009 FOR ELECTRICAL MOTORS

(10) Le specifiche per la progettazione ecocompatibile devono armonizzare i requisiti riguardanti il consumo di energia elettrica dei motori in tutta la Comunità, contribuendo in tal modo al funzionamento del mercato interno e al miglioramento delle prestazioni ambientali di tali pro-dotti.

(11) Occorre definire un calendario opportuno che permetta ai fabbricanti di riprogettare i prodotti. I tempi devono essere tali da evitare impatti negativi sulle funzionalità dei motori e devono tenere conto dell’incidenza sui costi per i produttori, in particolare per le piccole e medie imprese, assicurando nel contempo che gli obiettivi del regola mento vengano raggiunti nei tempi previsti.

(12) Il consumo di energia elettrica deve essere determinato con metodi di misura affidabili, accurati e riproducibili che tengano conto dello stato dell’arte riconosciuto, com prese le eventuali norme armonizzate adottate dagli or ganismi europei di normazione elencati nell’allegato I della direttiva 98/34/CE del Parlamento europeo e del Consiglio, del 22 giugno 1998, che prevede una proce dura d’informazione nel settore delle norme e delle rego lamentazioni tecniche ( 1 ).

(13) Il presente regolamento deve favorire la penetrazione sul mercato di tecnologie che diminuiscono l’impatto am bientale dei motori elettrici durante il loro ciclo di vita, con un risparmio del consumo energetico e di elettricità nell’arco dell’intero ciclo di vita stimato rispettivamente in 5 500 PJ ( 2 ) e 135 TWh, entro il 2020, rispetto ad uno scenario nel quale non venissero adottate misure.

(14) Ai sensi dell’articolo 8 della direttiva 2005/32/CE, il pre sente regolamento specifica le procedure di valutazione della conformità applicabili.

(15) Per agevolare il controllo della conformità, i fabbricanti devono essere invitati a fornire informazioni nella docu mentazione tecnica di cui agli allegati IV e V della diret tiva 2005/32/CE.

(16) Al fine di limitare ulteriormente l’impatto ambientale dei motori, i fabbricanti devono fornire informazioni utili sullo smontaggio, sul riciclaggio o sullo smaltimento a fine vita.

(17) Occorre individuare i parametri di riferimento per le tec nologie attualmente disponibili caratterizzate da un’ele vata efficienza energetica. Questo permetterà di assicurare un’ampia disponibilità e un facile accesso alle informa zioni, in particolare per le piccole e medie imprese e le microimprese, facilitando ulteriormente l’integrazione delle migliori tecnologie progettuali per ridurre il con sumo di energia.

(18) Le misure di cui al presente regolamento sono conformi al parere del comitato istituito dall’articolo 19, paragrafo 1, della direttiva 2005/32/CE, HA ADOTTATO IL PRESENTE REGOLAMENTO:

Articolo 1

Oggetto e ambito di applicazione

1. Il presente regolamento istituisce specifiche per la proget tazione ecocompatibile al fine di immettere in commercio e mettere in servizio i motori, anche integrati in altri prodotti.

2. Il presente regolamento non si applica:

a) ai motori progettati per funzionare interamente immersi in un liquido;

b) ai motori completamente integrati in un prodotto (ad esem pio in un cambio, una pompa, un ventilatore o un com pressore) per i quali non è possibile testare le prestazioni energetiche autonomamente dal prodotto;

c) ai motori progettati appositamente per funzionare:

i) a più di 1 000 metri di altitudine sul livello del mare;

ii) a temperature dell’aria ambiente superiori a 40 °C;

iii) a una temperatura massima di esercizio superiore a 400 °C;

iv) a temperature ambiente dell’aria inferiori a – 15 °C per qualsiasi tipo di motore o inferiori a 0 °C per motori muniti di raffreddamento dell’aria;

v) a una temperatura del refrigerante dell’acqua in entrata al prodotto inferiore a 5 °C o superiore a 25 °C;

vi) in atmosfere potenzialmente esplosive, quali definite nella direttiva 94/9/CE del Parlamento…