657-19-103JB (VEG 19.07) - Pre-Bid Questions With Responses.pdf

Replace Mechanical Systems in Buildings 18 & 60

657-19-103JB

Question from pre solicitation site visit on May 5, 2020

1. Will workman on site be allowed to park near the building, or will they park remotely? Please specify.

Answer: Workman will be allowed to park near the building.

2. Will there be limitations or regulations for dumpsters and equipment trailers on site in the parking lots adjacent to the buildings?

Answer: Dumpsters can be placed adjacent to the Buildings. Drawings call for the contractor to provide a temporary gravel lot for construction staging. This area can include a construction job trailer. Power to trailer would be feed from Building 18.

3. Access to the mechanical room is limited. Is there a plan for getting the new air handling equipment into the mechanical room in the basement?

Answer: The intent is to bring the AHU in through the existing air intake.

4. Did not find specifications that apply to the make-up air units on bldg. 60. Will specifications be issued?

Answer: See attached for revised 23 34 00 HVAC fans, Para. 2.5. CaptiveAir is Basis of Design.

5. Is the base bid to be standalone independent unit controls, with the alternate to include a BAS system

Answer: The base bid is for all controls to be incorporated in the existing campus BAS. The alternate is to provide standalone BAS for Building 18 that reports to campus BAS.

6. Do the make-up air units come with matching kitchen equipment hoods? Did not see schedules or guidelines for the hoods in the bid documents.

Answer: That is an acceptable solution, with CaptiveAir as our Basis of Design. But it is not required to be by same manufacturer. See attached Kitchen Hood Specification – 23 38 13.

7. On the electrical drawings concerning the VAV units, there is a note on the documents stating to provide a 50va 120/24v control transformer… provide clarification as to are these VAV units NOT coming with the new units? We have usually found that these are shipped with the VAV unit as an integral unit. Are we then to assume that a transformer will need to be provided for each unit installed? Provide clarification

Answer: The VAV units specified do not come with the transformer which is why the note was generated for the EC to provide, i.e. furnish, and install. Please provide transformer bid per the 100% CD Bid Documents.

One 50VA 120/24V control transformer will serve (7) VAV’s based on 7-watt load per VAV as Basis-of-Design. Transformer must be installed in an accessible location.

02-01-15

23 34 00 - 1

SECTION 23 34 00

HVAC FANS

PART 1 - GENERAL

1.1 DESCRIPTION

A. Fans for heating, ventilating and air conditioning.

B. Product Definitions: AMCA Publication 99, Standard l-66.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.

C. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL

COMPONENTS.

D. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

E. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC EQUIPMENT.

F. Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT.

G. Section 23 05 93, TESTING, ADJUSTING, and BALANCING FOR HVAC.

H. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

I. Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS.

J. Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS.

1.3 QUALITY ASSURANCE

A. Refer to paragraph, QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK

RESULTS FOR HVAC and STEAM GENERATION.

B. Fans and power ventilators shall be listed in the current edition of

AMCA 26l, and shall bear the AMCA performance seal.

C. Operating Limits for Centrifugal Fans: AMCA 99 (Class I, II, and III).

D. Fans and power ventilators shall comply with the following standards:

l. Testing and Rating: AMCA 2l0.

2. Sound Rating: AMCA 300.

E. Vibration Tolerance for Fans and Power Ventilators: Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT.

F. Performance Criteria:

l. The fan schedule shall show the design air volume and static pressure. Select the fan motor HP by increasing the fan BHP by 10 percent to account for the drive losses and field conditions.

2. Select the fan operating point as follows:

23 34 00 - 2

a. Forward Curve and Axial Flow Fans: Right hand side of peak pressure point

b. Air Foil, Backward Inclined, or Tubular: At or near the peak static efficiency

G. Safety Criteria: Provide manufacturer's standard screen on fan inlet and discharge where exposed to operating and maintenance personnel.

H. Corrosion Protection:

1. Except for fans in fume hood exhaust service, all steel shall be mill-galvanized, or phosphatized and coated with minimum two coats, corrosion resistant enamel paint. Manufacturers paint and paint system shall meet the minimum specifications of: ASTM D1735 water fog; ASTM B117 salt spray; ASTM D3359 adhesion; and ASTM G152 and

G153 for carbon arc light apparatus for exposure of non-metallic material.

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, and SAMPLES.

B. Manufacturers Literature and Data:

l. Fan sections, motors and drives.

2. Centrifugal fans, motors, drives, accessories and coatings.

3. Prefabricated roof curbs.

4. Power roof ventilators.

5. Centrifugal ceiling fans.

C. Certified Sound power levels for each fan.

D. Motor ratings types, electrical characteristics and accessories.

E. Maintenance and Operating manuals in accordance with Section 01 00 00, GENERAL REQUIREMENTS.

F. Certified fan performance curves for each fan showing cubic feet per minute (CFM) versus static pressure, efficiency, and horsepower for design point of operation.

1.5 APPLICABLE PUBLICATIONS

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

B. Air Movement and Control Association International, Inc. (AMCA):

99-86 ..................Standards Handbook

23 34 00 - 3

2l0-06 .................Laboratory Methods of Testing Fans for

Aerodynamic Performance Rating

26l-09 .................Directory of Products Licensed to bear the AMCA

Certified Ratings Seal - Published Annually

300-08 .................Reverberant Room Method for Sound Testing of

Fans

C. American Society for Testing and Materials (ASTM):

B117-07a ...............Standard Practice for Operating Salt Spray

(Fog) Apparatus

D1735-08 ...............Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus

D3359-08 ...............Standard Test Methods for Measuring Adhesion by

Tape Test

G152-06 ................Standard Practice for Operating Open Flame

Carbon Arc Light Apparatus for Exposure of Non-

Metallic Materials

G153-04 ................Standard Practice for Operating Enclosed Carbon

Arc Light Apparatus for Exposure of Non-

Metallic Materials

D. National Fire Protection Association (NFPA):

NFPA 96-08 .............Standard for Ventilation Control and Fire

Protection of Commercial Cooking Operations

E. National Sanitation Foundation (NSF):

37-07 ..................Air Curtains for Entrance Ways in Food and Food

Service Establishments

F. Underwriters Laboratories, Inc. (UL):

181-2005 ...............Factory Made Air Ducts and Air Connectors

1.6 EXTRA MATERIALS

A. Provide one additional set of belts for all belt-driven fans.

PART 2 - PRODUCTS

2.1 FAN SECTION (CABINET FAN)

A. Refer to specification Section 23 73 00, INDOOR CENTRAL-STATION AIR-

HANDLING UNITS.

23 34 00 - 4

2.2 CENTRIFUGAL FANS

A. Standards and Performance Criteria: Refer to Paragraph, QUALITY

ASSURANCE. Record factory vibration test results on the fan or furnish to the Contractor.

B. Fan arrangement, unless noted or approved otherwise:

l. DWDl fans: Arrangement 3.

C. Construction: Wheel diameters and outlet areas shall be in accordance with AMCA standards.

l. Housing: Low carbon steel, arc welded throughout, braced and supported by structural channel or angle iron to prevent vibration or pulsation, flanged outlet, inlet fully streamlined. Provide lifting clips, and casing drain. Provide manufacturer's standard access door. Provide 12.5 mm (1/2 inches) wire mesh screens for fan inlets without duct connections.

2. Wheel: Steel plate with die formed blades welded or riveted in place, factory balanced statically and dynamically.

3. Shaft: Designed to operate at no more than 70 percent of the first critical speed at the top of the speed range of the fans class.

4. Bearings: Heavy duty ball or roller type sized to produce a Bl0 life of not less than 50,000 hours, and an average fatigue life of

200,000 hours. Extend filled lubrication tubes for interior bearings or ducted units to outside of housing.

5. Belts: Oil resistant, non-sparking and non-static.

6. Belt Drives: Factory installed with final alignment belt adjustment made after installation.

7. Motors and Fan Wheel Pulleys: Adjustable pitch for use with motors through 15HP, fixed pitch for use with motors larger than 15HP.

Select pulleys so that pitch adjustment is at the middle of the adjustment range at fan design conditions.

8. Motor, adjustable motor base, drive and guard: Furnish from factory with fan. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC for specifications. Provide protective sheet metal enclosure for fans located outdoors.

9. Furnish variable speed fan motor controllers where shown on the drawings. Refer to Section, MOTOR STARTERS. Refer to Section 23 05

23 34 00 - 5

11, COMMON WORK RESULTS FOR HVAC for controller/motor combination requirements.

D. In-line Centrifugal Fans: In addition to the requirements of paragraphs

A and 2.2.C3 thru 2.2.C9, provide minimum 18 Gauge galvanized steel housing with inlet and outlet flanges, backward inclined aluminum centrifugal fan wheel, bolted access door and supports as required.

Motors shall be factory pre-wired to an external junction box. Provide factory wired disconnect switch.

2.3 POWER ROOF VENTILATOR (NOT USED)

2.4 POWER WALL VENTILATOR (NOT USED)

2.5 PACKAGED HOOD MAKE-UP AIR UNITS

A. Curb mounted air supply and exhaust unit complete with centrifugal blowers and filters.

1. Housing: Galvanized steel with baffled air intake for weather protection and with duct adapter.

2. Blower: Ball bearing utility type with vibration mounts to isolate blower, motor, and drive.

3. Prefabricated roof curb: As specified in paragraph 2.3 of this section.

4. Filters: Provide four 2” MERV 8 disposable filters

B. Provide easy access to motor and drive.

C. Provide steam heating coil where scheduled. Refer to specification

Section 23 82 16, AIR COILS.

2.6 CENTRIFUGAL CEILING FANS (SMALL CABINET FAN) (NOT USED)

2.7 PROPELLER FANS (NOT USED)

2.8 VANE AXIAL FANS (NOT USED)

2.9 AIR CURTAIN UNITS (NOT USED)

PART 3 – EXECUTION

3.1 INSTALLATION

A. Install fan, motor and drive in accordance with manufacturer's instructions.

B. Align fan and motor sheaves to allow belts to run true and straight.

C. Bolt equipment to curbs with galvanized lag bolts.

D. Install vibration control devices as shown on drawings and specified in

Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT.

23 34 00 - 6

3.2 PRE-OPERATION MAINTENANCE

A. Lubricate bearings, pulleys, belts and other moving parts with manufacturer recommended lubricants.

B. Rotate impeller by hand and check for shifting during shipment and check all bolts, collars, and other parts for tightness.

C. Clean fan interiors to remove foreign material and construction dirt and dust.

3.3 START-UP AND INSTRUCTIONS

A. Verify operation of motor, drive system and fan wheel according to the drawings and specifications.

B. Check vibration and correct as necessary for air balance work.

C. After air balancing is complete and permanent sheaves are in place perform necessary field mechanical balancing to meet vibration tolerance in Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC

PIPING and EQUIPMENT.

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02-01-20

23 38 13 - 1

SECTION 23 38 13

COMMERCIAL-KITCHEN HOODS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies food service exhaust ventilators.

1.2 DEFINATIONS

A. Ventilator, kitchen hood, hood and canopy; for purposes of this specification section, these terms all have the same definition.

B. Eyebrow, compensating, short circuit, short cycle types are not allowed.

1.3 RELATED WORK

A. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL

COMPONENTS: Seismic Restraint of Equipment.

C. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Remote monitoring of the kitchen ventilation system.

D. Section 23 34 00, HVAC FANS: Up-blast kitchen hood exhaust fans.

E. Section 26 05 21, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

(600 VOLTS AND BELOW): Electrical Connections.

1.4 QUALITY CONTROL

A. Installer Qualifications: Experienced in food service equipment installation or supervised by an experienced food service equipment installer.

1. Where required to complete equipment installation, electrician and plumber shall be licensed in jurisdiction where project is located.

B. NSF Compliance: Equipment bears NSF Certification Mark or UL

Classification Mark indicating compliance with applicable NSF standards, including NSF/ANSI 2, NSF 2-Supplement, and NSF/ANSI 4.

C. UL Listing: Equipment has been evaluated according to UL 710, is listed in UL "Heating, Cooling, Ventilating and Cooking Equipment Directory," and is labeled for intended use.

D. Welding: Perform welding according to AWS D9.1M/D9.1.

E. Seismic Restraint:

2. Comply with requirements in Section 13 05 41, SEISMIC RESTRAINT

REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS.

23 38 13 - 2

3. Comply with applicable guidelines for seismic restraint of kitchen equipment contained in SMACNA's "Kitchen Ventilation Systems and

Food Service Equipment Guidelines," Appendix A.

F. In-Use Service: At least one factory-authorized service agency for equipment shall be located in the geographical area of the installation and shall have the ability to provide service within 24 hours after receiving a service call.

1.5 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Manufacturer’s Literature and Data:

1. Include manufacturer's address and telephone number.

2. Include catalog or model numbers, and illustrations and descriptions of ventilators and accessories.

C. Installation Drawings: Show dimensions; method of assembly; and details of installation, adjoining construction, coordination with service utilities, and other work required for a complete installation.

D. Field Test Reports: Indicate dates and times of tests and certify test results.

E. Operating Instructions: Include operating instructions covering operation of all components and maintenance procedures covering proper cleaning and necessary lubrication or adjustments to controls.

F. LEED Information:

1. LEED (v 3.0) MR Credit 4, Recycled Content: Product data indicating percentages, by weight of post-consumer and post-industrial recycled content for products having recycled content:

a. Include statement indicating costs for each product having recycled content.

2. LEED (v 3.0) MR Credit 5, Regional Materials: Manufacturer’s data identifying point of origin for products procured within 500 mile radius of the project:

a. Include statement indicating costs for each product submitted.

1.6 WARRANTY

A. Warrant food service equipment to be free from defects in materials and workmanship in accordance with requirements of "Warranty of

Construction" article in FAR clause 52.246-21.

23 38 13 - 3

1.7 APPLICABLE PUBLICATIONS

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

B. American Welding Society (AWS):

D9.1M/D9.1-2018 ........Sheet Metal Welding Code

C. ASTM International (ASTM):

A666-2015 ..............Standard Specification for Annealed or Cold-

Worked Austenitic Stainless-Steel Sheet, Strip, Plate, and Flat Bar

D. National Association of Architectural Metal Manufacturers (NAAMM):

AMP500-2006 ............Metal Finishes Manual for Architectural and

Metal Products, 2006

E. NFPA International (NFPA):

#96-2018 ...............Standard for Ventilation Control and Fire

Protection of Commercial Cooking Operations

F. NSF International/American National Standards Institute (NSF/ANSI):

Standard #2-2018 .......Food Service Equipment

Standard #4-2016 .......Commercial Cooking, Rethermalization, and

Powered Hot Food Holding and Transport

Equipment

G. Sheet Metal and Air Conditioning Contractors' National Association

(SMACNA):

1767-2001 ..............Kitchen Ventilation Systems and Food Service

Equipment Fabrication and Installation

Guidelines

H. Underwriters Laboratories Inc. (UL):

#710-2014 ..............Exhaust Hoods for Commercial Cooking Equipment

PART 2 - PRODUCTS

2.1 EXHAUST HOODS

A. The hood shall be constructed of a minimum of 18 gauge, (type 304) stainless steel with a #3 finish. Hood shall be constructed using the standing seam method for optimum strength. The seams on the canopy shall be welded liquidtight, and all exposed external welds shall be ground and polished to match the original finish of the metal. Lighter material gauges, alternate material types and finishes (400 series

23 38 13 - 4 stainless steel, cold rolled steel, etc.) and non-liquidtight welding

(tack weld, spot weld, etc.) is not acceptable. Construction shall include corrosion-resistant steel framing members for strength. Short circuit style hoods are not allowed. Hood shall be of a design to lower the CFM requirements by at least 20 to 30 percent. This can be accomplished by various internal configurations or air deflectors.

B. Designer to verify CFM and pressure drop with manufacturer.

INTERNATIONAL MECHANICAL REQUIREMENTS PER LINEAR FOOT

TYPE OF HOOD CFM

MEDIUM-DUTY COOKING APPLIANCES (Kettles) Wall-Mounted Canopy 300

LIGHT-DUTY COOKING APPLIANCES (Combi-Ovens) Wall-Mounted Canopy 200

C. Vapor proof, UL Listed, recessed Fluorescent light fixtures shall be prewired to a junction box situated at the top of the hood for field connection. Wiring shall conform to the requirements of the National

Electrical Code (NEC #70).

D. Options

1. Enclosure Panels: 1.3 mm (0.05 inch) thick stainless steel shall be installed; locate between ventilator top and ceiling on all exposed sides.

2. Back shall be finished. (ALL EXPOSED AREAS OF HOOD TO BE FINISHED)

3. Stainless-steel wall flashing shall be installed on wall behind and on the side(s) of ventilator from wall curb to bottom of ventilator.

4. Provide remote monitoring of the kitchen ventilation system via the

DDC control system. Coordinate interface with Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

5. Fresh air make-up plenum incorporated into the front face of the hood or provided at ceiling line immediately in front of the hood.

E. Exhaust Ventilator System Requirements: (X represents specific unit number)

SYMBOL Description Type

60-KH-

X

Ventilator Single sided- Wall

PART 3 - EXECUTION

23 38 13 - 5

3.1 INSTALLATION

A. Install ventilators level and plumb with access clearances required for operation, maintenance and cleaning and in accordance with the manufacturer's published documentation.

B. Interconnect ventilators to service utilities.

C. Install seismic restraints for equipment.

3.2 FIELD TESTING

A. Field Testing, General: Following installation, test ventilators for compliance with specified requirements and those of authorities having jurisdiction. Perform testing after air-handling systems have been balanced and adjusted.

B. Smoke Test:

1. Test Conditions:

a. Perform tests with cooking equipment served by ventilator turned off.

b. Perform tests with supply and exhaust fans serving the food service kitchen area turned on.

2. Test Procedure: Move a smoke bomb around the perimeter of cooking equipment at the top surface.

3. Test-Performance Requirements: No visible smoke shall escape from the ventilator canopy into the room.

3.3 CLEAN-UP

A. At completion of the installation, clean and adjust equipment as required to produce ready-for-use condition.

B. Where stainless-steel surfaces are damaged during installation procedures, repair finishes to match adjoining undamaged surfaces.

3.4 INSTRUCTIONS

A. Instruct personnel and transmit operating instructions in accordance with requirements.

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