BP25-05 Addendum 01 (002) (1).pdf

L’Anse Creuse Public Schools 2024 Bond Projects – Bid Pack 25-05 Addendum No. 1 May 23, 2025

ADDENDUM

Project Name: L’Anse Creuse Public Schools Addendum No: One (1) 2024 Bond Projects – BP25-05 High School Pool Mechanical Improvements

Project Number: 25-105 Issue Date: May 23, 2025 Project Location: L’Anse Creuse High School & L’Anse Creuse High School – North

This Addendum forms a part of the above-described Contract Documents and supersedes supplements or clarifies parts thereof to the extent defined by the terms set forth in this Addendum.

This document consists of (2) typed pages and the following Specification and Drawing attachments:

BP25-5A Drawings: A3-01 BP25-5B Drawings: A3-01 Specifications: 055000, 055213, 077200, 223400, 228416.13

SPECIFICATION REVISIONS:

ITEM SP1 Section 055000 – Metal Fabrications (Issued in This Addendum)

ITEM SP2 Section 055213 – Pipe and Tube Railings (Issued in This Addendum)

ITEM SP3 Section 077200 – Roof Accessories (Issued in This Addendum)

ITEM SP4 Section 223400 – Fuel Fired Domestic Water Heaters (Revised & Reissued) A. Removed 1.6.A.1 – Failures, and 1.6.A.2 - Warranty Period(s).

B. Removed 2.1.1.f – State Industries, Inc., and replaced with Aerco.

C. Removed 2.1.A.2 – Storage Tank Construction, 2.1.A.3 – Factory Installed, Storage Tank

Appurtenances, 2.1.A.4 – Burner, 2.1.B – Commercial, Power Vent, Storage, Gas Water Heaters, and 2.1.C – Commercial, High-Efficiency, Gas-Water Heaters.

D. Added 2.1.B – Boiler Modules, 2.1.C – Boiler Heat Exchanger, 2.1.D – Exhaust Manifold, Condensate Trap, and Condensate Neutralizer, 2.1.E – Boiler Controls, 2.1.F – Internal Setpoint, and 2.1.G – Controls Interoperability.

ITEM SP5 Section 228416.13 – Outdoor, Mechanical Dehumidification Units (Revised & Reissued) A. Removed 2.2.E.12.d – Line Conditioning, and 2.2.E.12.e. – Bypass Systems.

B. Removed 2.2.G.4 – Energy Recovery Heat Exchanger (Pool Heater), and replaced with Sensible Flat

Plate Heat Exchanger.

C. Added 2.2.K – Airflow Monitoring Station.

D. Revised 2.2.K – Controls to 2.2.L – Controls.

E. Removed 2.2.L.4 – Operating Control, Ice Rinks, and replaced with Field Mounted Sensors.

F. Removed “capable of being remotely mounted” from 2.2.L.5 – Operating Control, Indoor Pool Units.

G. Removed 2.2.L.5.a.5) – System heating pool water, and 2.2.L.5.a.10) – Pool water temperature.

H. Removed 2.2.L.5.b.3) – High water temperature, and 2.2.L.5.b.5) – Low water flow.

I. Removed 2.2.L.5.d.6) – Airflow rating.

J. Removed 2.2.L.6.f.4) – Pool water out temperature, and 2.2.L.6.f.5) – Pool water in temperature.

K. Removed 2.2.L.6.j – status and alarm functions, and 2.2.L.6.k – controls via operator panel.

L’Anse Creuse Public Schools 2024 Bond Projects – Bid Pack 25-05 Addendum No. 1 May 23, 2025

L. Revised 2.2.M.2 – Electrical Convenience Outlet.

M. Revised 2.2.N – Roof Curbs, and 2.2.N.1.

BP25-05A DRAWING REVISIONS – L’Anse Creuse High School:

Architectural ITEM A1 Drawing A3-01 – FLOOR & ROOF PLANS, FRAMING PLANS & SECTIONS (Revised & Reissued)

A. Added non-penetrating roof guard rail system to roof at grillage approach and existing roof hatch. See also new spec section 077200.

B. Added note for new pipe rails on Enlarged Grillage Plan.

C. Noted existing roof hydrant on plans.

BP25-05B DRAWING REVISIONS – L’Anse Creuse High School – North:

Architectural ITEM A1 Drawing A3-01 – FLOOR & ROOF PLANS, FRAMING PLANS & SECTIONS (Revised & Reissued)

A. Added non-penetrating roof guard rail system to roof at grillage approach and existing roof hatch. See also new spec section 077200.

B. Added section of pipe guard rail at high DHU access doors, with HSS posts welded to existing structure, as indicated on the Enlarged Grillage Plan (detail 5) and new Grillage Elevation (detail 8).

C. Added note for new pipe rails on Enlarged Grillage Plan, and removed reference to galvanized rails. New railings are to receive the same zinc primer and coatings as rest of grillage.

*** END OF ADDENDUM ***

PARTNERS 25-105

METAL FABRICATIONS

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SECTION 055000 - METAL FABRICATIONS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Miscellaneous framing and supports.

2. Miscellaneous steel trim.

3. Loose bearing and leveling plates.

4. Roof Access Ladders

B. Products furnished, but not installed, under this Section include the following:

1. Loose steel lintels.

2. Anchor bolts, steel pipe sleeves, slotted-channel inserts, and wedge-type inserts indicated to be cast into concrete or built into unit masonry.

3. Steel weld plates and angles for casting into concrete.

1.2 REFERENCES

A. Coordinate with General Structural Notes on drawings.

1.3 ACTION SUBMITTALS

A. Product Data: For the following:

1. Fasteners.

2. Steel ladders.

B. Shop Drawings: Show fabrication and installation details. Include plans, elevations, sections, and details of metal fabrications and their connections. Show anchorage and accessory items.

C. Delegated Design Submittals: For stairs, ladders, & railings, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000 "Quality Requirements," to design stairs, ladders, & railings.

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B. Structural Performance of Stairs: Metal stairs withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

1. Uniform Load: 100 lbf/sq. ft..

2. Concentrated Load: 300 lbf applied on an area of 4 sq. in..

3. Uniform and concentrated loads need not be assumed to act concurrently.

4. Stair Framing: Capable of withstanding stresses resulting from railing and guard loads in addition to loads specified above.

5. Limit deflection of treads, platforms, and framing members to L/360.

2.2 METALS

A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For metal fabrications exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.

B. Steel Plates, Shapes, and Bars: ASTM A36/A36M.

C. Steel Tubing: ASTM A500/A500M, cold-formed steel tubing.

D. Steel Pipe: ASTM A53/A53M, Standard Weight (Schedule 40) unless otherwise indicated.

E. Provide galvanized steel finish for exterior installations.

F. Slotted Channel Framing: Cold-formed metal box channels (struts) complying with MFMA-4.

1. Size of Channels: 1-5/8 by 1-5/8 inches or as indicated.

2. Material: Galvanized steel, ASTM A653/A653M, commercial steel, Type B, with G90 coating; 0.108-inch nominal thickness.

3. Material: Cold-rolled steel, ASTM A1008/A1008M, commercial steel, Type B 0.0966-inch minimum thickness; coated with rust-inhibitive, baked-on, acrylic enamel.

2.3 FASTENERS

A. General: Unless otherwise indicated, provide Type 304 stainless steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B633 or ASTM F1941/F1941M, Class Fe/Zn 5, at exterior walls. Select fasteners for type, grade, and class required.

1. Provide stainless steel fasteners for fastening aluminum or stainless steel.

2. Provide bronze fasteners for fastening bronze.

B. Post-Installed Anchors: Torque-controlled expansion anchors or chemical anchors.

1. Material for Interior Locations: Carbon-steel components zinc plated to comply with ASTM B633 or ASTM F1941/F1941M, Class Fe/Zn 5, unless otherwise indicated.

2. Material for Exterior Locations and Where Stainless Steel Is Indicated: Alloy Group 1stainless steel bolts, ASTM F593, and nuts, ASTM F594.

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2.4 MISCELLANEOUS MATERIALS

A. Shop Primers: Provide primers that comply with Section 099113 "Exterior Painting."

B. Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79 and compatible with topcoat.

1. Use primer containing pigments that make it easily distinguishable from zinc-rich primer.

C. Water-Based Primer: Emulsion type, anticorrosive primer for mildly corrosive environments that is resistant to flash rusting when applied to cleaned steel, complying with MPI#107 and compatible with topcoat.

D. Epoxy Zinc-Rich Primer: Complying with MPI#20 and compatible with topcoat.

E. Shop Primer for Galvanized Steel: Primer formulated for exterior use over zinc-coated metal and compatible with finish paint systems indicated.

F. Galvanizing Repair Paint: High-zinc-dust-content paint complying with SSPC-Paint 20 and compatible with paints specified to be used over it.

G. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D1187/D1187M.

H. Shrinkage-Resistant Grout: Factory-packaged, nonmetallic, nonstaining, noncorrosive, nongaseous grout complying with ASTM C1107/C1107M. Provide grout specifically recommended by manufacturer for interior and exterior applications.

2.5 FABRICATION, GENERAL

A. Shop Assembly: Preassemble items in the shop to greatest extent possible. Disassemble units only as necessary for shipping and handling limitations. Use connections that maintain structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.

B. Provide complete stair assemblies, including metal framing, hangers, railings, guards, clips, brackets, bearing plates, and other components necessary to support and anchor stairs and platforms on supporting structure.

1. Join components by welding unless otherwise indicated.

2. Use connections that maintain structural value of joined pieces.

C. Assemble ladders & platforms in shop to greatest extent possible.

1. Disassemble units only as necessary for shipping and handling limitations.

2. Clearly mark units for reassembly and coordinated installation.

D. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.

E. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing work.

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F. Form exposed work with accurate angles and surfaces and straight edges.

G. Weld corners and seams continuously to comply with the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.

H. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners or welds where possible. Where exposed fasteners are required, use Phillips flat-head (countersunk) fasteners unless otherwise indicated. Locate joints where least conspicuous.

I. Fabricate seams and other connections that are exposed to weather in a manner to exclude water. Provide weep holes where water may accumulate.

J. Where units are indicated to be cast into concrete or built into masonry, equip with integrally welded steel strap anchors, not less than 8 inches from ends and corners of units and 24 inches o.c.

2.6 MISCELLANEOUS FRAMING AND SUPPORTS

A. General: Provide steel framing and supports not specified in other Sections as needed to complete the Work.

B. Fabricate units from steel shapes, plates, and bars of welded construction unless otherwise indicated.

Fabricate to sizes, shapes, and profiles indicated and as necessary to receive adjacent construction.

2.7 METAL LADDERS

A. General:

1. Comply with ANSI A14.3.

B. Steel Ladders:

1. Provide as indicated on the drawings.

2. Fit rungs in centerline of siderails; plug-weld and grind smooth on outer rail faces.

3. Provide nonslip surfaces on top of each rung.

2.8 LOOSE BEARING AND LEVELING PLATES

A. Provide loose bearing and leveling plates for steel items bearing on masonry or concrete construction. Drill plates to receive anchor bolts and for grouting.

B. Galvanize bearing and leveling plates.

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2.9 LOOSE STEEL LINTELS

A. Fabricate loose steel lintels from steel angles and shapes of size indicated for openings and recesses in masonry walls and partitions at locations indicated. Fabricate in single lengths for each opening unless otherwise indicated. Weld adjoining members together to form a single unit where indicated.

B. Galvanize and prime loose steel lintels located in exterior walls.

2.10 STEEL WELD PLATES AND ANGLES

A. Provide steel weld plates and angles not specified in other Sections, for items supported from concrete construction as needed to complete the Work. Provide each unit with no fewer than two integrally welded steel strap anchors for embedding in concrete.

2.11 GENERAL FINISH REQUIREMENTS

A. Finish metal fabrications after assembly.

2.12 STEEL AND IRON FINISHES

A. Galvanizing: Hot-dip galvanize items as indicated to comply with ASTM A153/A153M for steel and iron hardware and with ASTM A123/A123M for other steel and iron products.

1. Do not quench or apply post galvanizing treatments that might interfere with paint adhesion.

2. Fill vent and drain holes that are exposed in the finished Work, unless indicated to remain as weep holes, by plugging with zinc solder and filing off smooth.

B. Shop prime iron and steel items not indicated to be galvanized unless they are to be embedded in concrete, sprayed-on fireproofing, or masonry, or unless otherwise indicated.

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal fabrications.

Set metal fabrications accurately in location, alignment, and elevation; with edges and surfaces level, plumb, true, and free of rack; and measured from established lines and levels.

B. Fit exposed connections accurately together to form hairline joints. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations. Do not weld, cut, or abrade surfaces of exterior units that have been hot-dip galvanized after fabrication and are for bolted or screwed field connections.

C. Field Welding: Comply with the following requirements:

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1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.

D. Fastening to In-Place Construction: Provide anchorage devices and fasteners where metal fabrications are required to be fastened to in-place construction. Provide threaded fasteners for use with concrete and masonry inserts, toggle bolts, through bolts, lag screws, wood screws, and other connectors.

E. Provide temporary bracing or anchors in formwork for items that are to be built into concrete, masonry, or similar construction.

3.2 INSTALLATION OF MISCELLANEOUS FRAMING AND SUPPORTS

A. Install framing and supports to comply with requirements of items being supported, including manufacturers' written instructions and requirements indicated on Shop Drawings.

3.3 INSTALLATION OF METAL LADDERS

A. Secure ladders to adjacent construction with the clip angles attached to the stringer.

B. Install brackets as required for securing of ladders welded or bolted to structural steel or built into masonry or concrete.

3.4 REPAIRS

A. Touchup Painting:

1. Immediately after erection, clean field welds, bolted connections, and abraded areas. Paint uncoated and abraded areas with same material as used for shop painting to comply with SSPC-PA 1 for touching up shop-painted surfaces.

B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A780/A780M.

END OF SECTION 055000

PIPE AND TUBE RAILINGS

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MAY 23, 2025 / ADDENDUM #1

SECTION 055213 - PIPE AND TUBE RAILINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Steel railings.

1.2 ACTION SUBMITTALS

A. Product Data:

1. Shop primer.

B. Shop Drawings: Include plans, elevations, sections, details, and attachments to other work.

C. Delegated Design Submittal: For railings, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

1.3 INFORMATIONAL SUBMITTALS

A. Qualification Data: For delegated design professional engineer.

B. Welding certificates.

C. Product Test Reports: For tests on railings performed by a qualified testing agency, in accordance with ASTM E894 and ASTM E935.

1.4 QUALITY ASSURANCE

A. Welding Qualifications: Qualify procedures and personnel in accordance with the following:

1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000 "Quality Requirements," to design railings, including attachment to building construction.

B. Structural Performance: Railings, including attachment to building construction, withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

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1. Handrails and Top Rails of Guards:

a. Uniform load of 50 lbf/ ft. (0.73 kN/m) applied in any direction.

b. Concentrated load of 200 lbf (0.89 kN) applied in any direction.

c. Uniform and concentrated loads need not be assumed to act concurrently.

2. Infill of Guards:

a. Concentrated load of 50 lbf (0.22 kN) applied horizontally on an area of 1 sq. ft. (0.093 sq. m).

b. Infill load and other loads need not be assumed to act concurrently.

2.2 METALS, GENERAL

A. Metal Surfaces, General: Provide materials with smooth surfaces, without seam marks, roller marks, rolled trade names, stains, discolorations, or blemishes.

B. Brackets, Flanges, and Anchors: Cast or formed metal of same type of material and finish as supported rails unless otherwise indicated.

2.3 STEEL RAILINGS

A. Pipe: ASTM A53/A53M, Type F or Type S, Grade A, Standard Weight (Schedule 40), unless another grade and weight are required by structural loads.

B. Plates, Shapes, and Bars: ASTM A36/A36M.

2.4 FASTENERS

A. Fastener Materials:

1. Ungalvanized-Steel Railing Components: Plated steel fasteners complying with ASTM F1941/ASTM F1941M, Class Fe/Zn 5 for zinc coating.

2. Hot-Dip Galvanized Railing Components: Type 304 stainless steel or hot-dip zinc-coated steel fasteners complying with ASTM A153/A153M or ASTM F2329/F2329M for zinc coating.

B. Post-Installed Anchors: Fastener systems with working capacity greater than or equal to the design load, according to an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC193.

2.5 MISCELLANEOUS MATERIALS

A. Shop Primers: Provide primers that comply with Section 099113 "Exterior Painting"

2.6 FABRICATION

A. Cut, drill, and punch metals cleanly and accurately.

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MAY 23, 2025 / ADDENDUM #1

1. Remove burrs and ease edges to a radius of approximately 1/32 inch (1 mm) unless otherwise indicated.

2. Remove sharp or rough areas on exposed surfaces.

B. Form work true to line and level with accurate angles and surfaces.

C. Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings.

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove flux immediately.

4. At exposed connections, finish exposed welds to comply with NOMMA's "Voluntary Joint Finish

Standards" for Finish #2 welds; good appearance, completely sanded joint, some undercutting and pinholes okay.

D. Nonwelded Connections: Connect members with concealed mechanical fasteners and fittings. Fabricate members and fittings to produce flush, smooth, rigid, hairline joints.

E. Form changes in direction as follows:

1. By bending or by inserting prefabricated elbow fittings.

F. Bend members in jigs to produce uniform curvature for each configuration required. Maintain cross section of member throughout entire bend without buckling, twisting, cracking, or otherwise deforming exposed surfaces of components.

G. Close exposed ends of hollow railing members with prefabricated cap and end fittings of same metal and finish as railings.

H. Provide wall returns at ends of wall-mounted handrails unless otherwise indicated. Close ends of returns unless clearance between end of rail and wall is 1/4 inch (6 mm) or less.

I. Brackets, Flanges, Fittings, and Anchors: Provide wall brackets, flanges, miscellaneous fittings, and anchors to interconnect railing members to other work unless otherwise indicated.

J. Provide inserts and other anchorage devices for connecting railings to concrete or masonry work.

1. Fabricate anchorage devices capable of withstanding loads imposed by railings.

2. Coordinate anchorage devices with supporting structure.

K. For removable railing posts, fabricate slip-fit sockets from stainless steel tube or pipe whose ID is sized for a close fit with posts; limit movement of post without lateral load, measured at top, to not more than one-fortieth of post height.

1. Provide socket covers designed and fabricated to resist being dislodged.

2. Provide chain with eye, snap hook, and staple across gaps formed by removable railing sections at locations indicated. Fabricate from same metal as railings.

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2.7 STEEL AND IRON FINISHES

A. For nongalvanized-steel railings, provide nongalvanized ferrous-metal fittings, brackets, fasteners, and sleeves; however, hot-dip galvanize anchors to be embedded in exterior concrete or masonry.

B. Preparation for Shop Priming: Prepare uncoated ferrous-metal surfaces to comply with requirements indicated below:

1. Exterior Railings: SSPC-SP 6/NACE No. 3.

2. Railings Indicated To Receive Zinc-Rich Primer: SSPC-SP 6/NACE No. 3.

3. Other Railings: SSPC-SP 3.

C. Primer Application: Apply shop primer to prepared surfaces of railings unless otherwise indicated. Comply with requirements in SSPC-PA 1 for shop painting. Primer need not be applied to surfaces to be embedded in concrete or masonry.

1. Shop prime uncoated railings with primers specified in Section 099113 "Exterior Painting" and Section 099123 "Interior Painting”.

2. Do not apply primer to galvanized surfaces.

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Perform cutting, drilling, and fitting required for installing railings.

1. Fit exposed connections together to form tight, hairline joints.

2. Install railings level, plumb, square, true to line; without distortion, warp, or rack.

3. Set railings accurately in location, alignment, and elevation; measured from established lines and levels.

4. Do not weld, cut, or abrade surfaces of railing components that are coated or finished after fabrication and that are intended for field connection by mechanical or other means without further cutting or fitting.

5. Set posts plumb within a tolerance of 1/16 inch in 3 feet (2 mm in 1 m).

6. Align rails so variations from level for horizontal members and variations from parallel with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet (6 mm in 3.5 m).

B. Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

1. Coat concealed surfaces of aluminum that will be in contact with grout, concrete, masonry, wood, or dissimilar metals, with a heavy coat of bituminous paint.

3.2 ANCHORING POSTS

A. instructions.

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B. Anchor posts to metal surfaces with flanges, angle type, or floor type, as required by conditions, connected to posts and to metal supporting members.

3.3 ATTACHING RAILINGS

A. Attach handrails to walls with wall brackets, except where end flanges are used. Provide brackets with 1-1/2-inch clearance from inside face of handrail and finished wall surface.

B. Secure wall brackets to building construction as follows:

1. For concrete and solid masonry anchorage, use drilled-in expansion shields and hanger or lag bolts.

2. For hollow masonry anchorage, use toggle bolts.

3. For wood stud partitions, use hanger or lag bolts set into studs or wood backing between studs.

Coordinate with carpentry work to locate backing members.

C. Install railing gates level, plumb, and secure for full opening without interference.

3.4 CLEANING

A. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas, and repair galvanizing to comply with ASTM A780/A780M.

END OF SECTION 055213

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ROOF ACCESORIES

077200 - 1

SECTION 077200 – ROOF ACCESSORIES

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Manufactured units for the following applications:

1. Roof edge guardrail system.

1.2 ACTION SUBMITTALS

A. Product data: For roof accessories.

1. Manufacturer’s technical data for each accessory, including setting drawings, templates, finish requirements, and details of anchorage devices.

2. Include complete schedule, types, locations, construction details, finishes, latching or locking provisions, and other pertinent data.

B. Shop Drawings: For roof accessories.

1. Include plans, elevations, keyed details, and attachments to other work. Indicate dimensions, loadings, and special conditions. Distinguish between plant- and field-assembled work.

1.3 INFORMATIONAL SUBMITTALS

A. Coordination Drawings: Roof plans, drawn to scale, and coordinating penetrations and roof-mounted items.

B. Provide manufacturer’s standard warranty.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. General Performance: Roof accessories to withstand exposure to weather and resist thermally induced movement without failure, rattling, leaking, or fastener disengagement due to defective manufacture, fabrication, installation, or other defects in construction.

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2.2 ROOF EDGE GUARDRAIL SYSTEM

A. Provide and install 42-inch-high freestanding counterweighted roof edge guardrail system, including pipe railings, uprights, bases, counterweights, fittings, and delivery to site.

1. Basis-of-Design Product: Subject to compliance with requirements, provide “Safety Rail 2000 Rail

Kits”, as manufactured by BlueWater Manufacturing (Tractel), (952) 448-2935; or a comparable product by one of the following:

a. CAI Safety Systems, Inc.

b. Kee Safety, Inc.

c. Dakota Safety.

2. Construction:

a. Provide continuous rail kits with securing pins at locations indicated on roof plan drawings.

Typical rail to be 10-foot long and is to be provided as small as required at corners.

b. Provide roof surface protection pads compatible with existing roof system.

c. Rails are to be non-penetrating type.

d. System is to be tested and shown to meet or exceed OSHA and MIOSHA fall protection regulations for guardrails.

e. Galvanized railings are to be 1-5/8” diameter rails.

f. Provide offset parapet-style railing where indicated on plans.

g. Finish: Hot-dip galvanized

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Install roof accessories in accordance with manufacturer's written instructions.

1. Install roof accessories level; plumb; true to line and elevation; and without warping, jogs in alignment, buckling, or tool marks.

2. Install roof accessories to resist exposure to weather without failing, rattling, leaking, or loosening of fasteners and seals.

B. Metal Protection: Protect metals against galvanic action by separating dissimilar metals from contact with each other or with corrosive substrates by painting contact surfaces with bituminous coating or by other permanent separation as recommended in writing by manufacturer's written installation instructions.

1. Coat concealed side of uncoated aluminum and stainless steel roof accessories with bituminous coating where in contact with wood, ferrous metal, or cementitious construction.

2. Bed flanges in thick coat of asphalt roofing cement where required by manufacturers of roof accessories for waterproof performance.

3.2 INSTALLATION OF ROOF EDGE GUARDRAIL SYSTEM

A. Install in accordance with manufacturer's instructions.

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B. Fit exposed connections accurately together to form tight joints.

C. Perform cutting, and fitting required for installation of handrails. Set handrails and accurately place in loca-tion; alignment, and elevation, measured from established lines and levels.

3.3 CLEANING AND PROTECTION

A. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing in accordance with ASTM A780/A780M.

B. On completion of installation, clean exposed surfaces in according with manufacturer's written instructions.

Clean off excess sealants.

C. Remove temporary protective coverings and strippable films as roof accessories are installed. On completion of installation, clean finished surfaces, including removing unused fasteners, metal filings, pop rivet stems, and pieces of flashing. Maintain roof accessories in a clean condition during construction.

D. Replace roof accessories that have been damaged or that cannot be successfully repaired by finish touchup or similar minor repair procedures, as determined by Architect.

END OF SECTION 077200

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FUEL-FIRED DOMESTIC WATER HEATERS

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SECTION 223400 - FUEL-FIRED DOMESTIC WATER HEATERS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following fuel-fired water heaters:

1. Commercial, gas water heaters.

2. Compression tanks.

3. Water heater accessories.

4. Source quality control.

5. Circulating pump.

1.3 SUBMITTALS

A. Product Data: For each type and size of water heater indicated. Include rated capacities, operating characteristics, furnished specialties, and accessories.

B. Shop Drawings: Diagram power, signal, and control wiring.

C. Product Certificates: For each type of commercial water heater, signed by product manufacturer.

D. Source quality-control test reports.

E. Field quality-control test reports.

F. Operation and Maintenance Data: For water heaters to include in emergency, operation, and maintenance manuals.

G. Warranty: Special warranty specified in this Section.

1.4 QUALITY ASSURANCE

A. Source Limitations: Obtain same type of water heaters through one source from a single manufacturer.

B. Product Options: Drawings indicate size, profiles, and dimensional requirements of water heaters and are based on the specific system indicated. Refer to Division 01 Section "Product Requirements."

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C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

D. ASHRAE/IESNA 90.1-2004Compliance: Applicable requirements in ASHRAE/IESNA 90.1-2004.

E. ASME Compliance:

1. Where ASME-code construction is indicated, fabricate and label commercial water heater storage tanks to comply with ASME Boiler and Pressure Vessel Code: Section VIII, Division 1.

2. Where ASME-code construction is indicated, fabricate and label commercial, finned-tube water heaters to comply with ASME Boiler and Pressure Vessel Code: Section IV.

F. Comply with NSF 61, "Drinking Water System Components - Health Effects; Sections 1 through 9" for all components that will be in contact with potable water.

1.5 COORDINATION

A. Coordinate size and location of concrete bases with Architectural and Structural Drawings.

1.6 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of fuel-fired water heaters that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including storage tank and supports.

b. Faulty operation of controls.

c. Deterioration of metals, metal finishes, and other materials beyond normal use.

2. Warranty Period(s): From date of Substantial Completion:

a. Commercial, Gas Water Heaters:

1) Storage Tank: Three years.

2) Controls and Other Components: Three years.

b. Compression Tanks: One year.

PART 2 - PRODUCTS

2.1 COMMERCIAL, GAS WATER HEATERS

A. Commercial, Power-Burner, Storage, Gas Water Heaters: Comply with ANSI Z21.10.3/CSA 4.3.

1. Manufacturers:

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a. Lochinvar Water Heater Corp.

b. PVI Industries, Inc.

c. Rheem Water Heater Div.; City Investing Co.

d. Ruud Water Heater Div.; City Investing Co.

e. Smith Corp. (A.O.); Consumer Products Div.

f. State Industries, Inc.Aerco.

g. Bradford - White

2. Storage-Tank Construction: ASME-code steel with 150-psig (1035-kPa) working-pressure rating.

a. Tappings: Factory fabricated of materials compatible with tank. Attach tappings to tank before testing.

1) NPS 2 (DN 50) and Smaller: Threaded ends according to ASME B1.20.1.

2) NPS 2-1/2 (DN 65) and Larger: Flanged ends according to ASME B16.5 for steel and stainless-steel flanges, and according to ASME B16.24 for copper and copper-alloy flanges.

b. Interior Finish: Comply with NSF 61 barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

c. Lining: Glass complying with NSF 61 barrier materials for potable-water tank linings, including extending lining into and through tank fittings and outlets.

3. Factory-Installed, Storage-Tank Appurtenances:

a. Anode Rod: Replaceable magnesium.

b. Dip Tube: Provide unless cold-water inlet is near bottom of tank.

c. Drain Valve: Corrosion-resistant metal complying with ASSE 1005.

d. Insulation: Comply with ASHRAE/IESNA 90.1. Surround entire storage tank except connections and controls.

e. Jacket: Steel with enameled finish.

f. Combination Temperature and Pressure Relief Valves: ANSI Z21.22/CSA 4.4. Include one or more relief valves with total relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating. Select one relief valve with sensing element that extends into storage tank.

4. Burner: Comply with UL 795 for power-burner water heaters and for natural-gas fuel.

a. Available Manufacturers:

1) Adams Manufacturing Co.

2) Aero Environmental Ltd.

3) Carlin Combustion Technology, Inc.

4) Gordon-Piatt Group; John Zink Company, LLC.

5) Midco International Inc.

6) Power Flame, Inc.

7) Webster Engineering Co., L.L.C.

b. Automatic Ignition: ANSI Z21.20, electric, automatic, gas-ignition system.

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5. Temperature Control: Adjustable thermostat.

6. Safety Controls: Automatic, high-temperature-limit and low-water cutoff devices or systems.

7. Special Requirements: NSF 5 construction.

8. Draft Hood: Draft diverter; complying with ANSI Z21.12.

9. Building Automation System Interface: Normally closed dry contacts for enabling and disabling water heater.

B. Commercial, Power-Vent, Storage, Gas Water Heaters: Comply with ANSI Z21.10.3/CSA 4.3.

1. Manufacturers:

a. Lochinvar Water Heater Corp.

b. PVI Industries, Inc.

c. Aerco.

d. Ruud Water Heater Div.; City Investing Co.

e. Smith Corp. (A.O.); Consumer Products Div.

f. State Industries, Inc.

g. Bradford - White

2. Storage-Tank Construction: ASME-code steel with 150-psig (1035-kPa) working-pressure rating.

a. Tappings: Factory fabricated of materials compatible with tank. Attach tappings to tank before testing.

1) NPS 2 (DN 50) and Smaller: Threaded ends according to ASME B1.20.1.

2) NPS 2-1/2 (DN 65) and Larger: Flanged ends according to ASME B16.5 for steel and stainless-steel flanges, and according to ASME B16.24 for copper and copper-alloy flanges.

b. Interior Finish: Comply with NSF 61 barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

c. Lining: Glass complying with NSF 61 barrier materials for potable-water tank linings, including extending lining into and through tank fittings and outlets.

3. Factory-Installed, Storage-Tank Appurtenances:

a. Anode Rod: Replaceable magnesium.

b. Dip Tube: Provide unless cold-water inlet is near bottom of tank.

c. Drain Valve: Corrosion-resistant metal complying with ASSE 1005.

d. Insulation: Comply with ASHRAE/IESNA 90.1. Surround entire storage tank except connections and controls.

e. Jacket: Steel with enameled finish.

f. Burner: For use with power-vent water heaters and for natural-gas fuel.

g. Automatic Ignition: ANSI Z21.20, electric, automatic, gas-ignition system.

h. Temperature Control: Adjustable thermostat.

i. Safety Controls: Automatic, high-temperature-limit and low-water cutoff devices or systems.

j. Combination Temperature and Pressure Relief Valves: ANSI Z21.22/CSA 4.4. Include one or more relief valve with total relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating. Select one relief valve with sensing element that extends into storage tank.

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4. Special Requirements: NSF 5 construction.

5. Power-Vent System: Exhaust fan, interlocked with burner.

6. Building Automation System Interface: Normally closed dry contacts for enabling and disabling water heater.

C. Commercial, High-Efficiency, Gas Water Heaters: Comply with ANSI Z21.10.3/CSA 4.3.

1. Available Manufacturers:

a. Lochinvar Water Heater Corp.

b. PVI Industries, Inc.

c. Rheem Water Heater Div.; City Investing Co.

d. Ruud Water Heater Div.; City Investing Co.

e. Smith Corp. (A.O.); Consumer Products Div.

f. State Industries, Inc.

g. Bradford - White

2. Description: Manufacturer's proprietary design to provide at least 95 percent combustion efficiency at optimum operating conditions. Following features and attributes may be modified or omitted if water heater otherwise complies with requirements for performance.

3. Storage-Tank Construction: ASME-code steel with 150-psig (1035-kPa) minimum working-pressure rating.

a. Tappings: Factory fabricated of materials compatible with tank. Attach tappings to tank before testing.

1) NPS 2 (DN 50) and Smaller: Threaded ends according to ASME B1.20.1.

2) NPS 2-1/2 (DN 65) and Larger: Flanged ends according to ASME B16.5 for steel and stainless-steel flanges, and according to ASME B16.24 for copper and copper-alloy flanges.

b. Interior Finish: Comply with NSF 61 barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

c. Lining: Glass complying with NSF 61 barrier materials for potable-water tank linings, including extending lining into and through tank fittings and outlets.

4. Factory-Installed, Storage-Tank Appurtenances:

a. Anode Rod: Replaceable magnesium.

b. Dip Tube: Provide unless cold-water inlet is near bottom of tank.

c. Drain Valve: Corrosion-resistant metal complying with ASSE 1005.

d. Insulation: Comply with ASHRAE/IESNA 90.1. Surround entire storage tank except connections and controls.

e. Jacket: Steel with enameled finish.

f. Combination Temperature and Pressure Relief Valves: ANSI Z21.22/CSA 4.4. Include one or more relief valves with total relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating. Select one relief valve with sensing element that extends into storage tank.

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5. Burner or Heat Exchanger: Comply with UL 795 or approved testing agency requirements for high-efficiency water heaters and for natural-gas fuel.

6. Temperature Control: Adjustable thermostat.

7. Safety Controls: Automatic, high-temperature-limit and low-water cutoff devices or systems.

8. Building Automation System Interface: Normally closed dry contacts for enabling and disabling water heater.

9. Draft Hood: Draft diverter; complying with ANSI Z21.12.

B. Boiler modules shall be gas fired (natural gas or propane unit), condensing, modular, stainless steel water-tube design with a modulating forced draft power burner and positive pressure vent discharge.

1. The compact and sturdy design shell and tube heat exchanger shall be constructed of Cupro Nickel, Stainless Steel or Titanium on tube side for pool water and Bronze or Cast Iron on shell side for boiler water with a working pressure of 87 psig. Heat exchanger shall be sized to at least meet or exceed the capacity of the boiler and heat the pool water with high efficiency. Heat exchanger tube stacks shall be easily removable to facilitate cleaning and maintenance in the field.

2. Low Water Cut-Off shall be wired to internal boiler safety controls to prevent boiler operation in case of insufficient boiler water flow.

3. Air vent shall be provided at highest level to automatically purge the unwanted air in the closed boiler water loop.

4. Makeup water connection shall be provided to boiler water loop for fast fill and contain pressure reducing fill valve along with shutoff valve.

5. All components shall be piped together and secured to the carbon steel support base for ease of handling and installation.

6. Burner, Modulating Gas Valve, and Variable Speed Fan:

a. The boiler shall consist of the number of thermal modules, and have a total turndown ratio, 20:1, without loss of combustion efficiency. Each module shall have a dedicated isolation valve on the inlet side of the module. Each thermal module’s premix burner shall be metal fiber mesh covering a stainless steel head, with spark ignition and flame rectification. All burner material exposed to the combustion zone shall be of stainless steel construction.

There shall be no moving parts within the burner itself. The burners shall produce <20 ppm of Nox corrected to 3% excess oxygen. A modulating gas valve and variable speed fan shall meter the natural gas and air input, respectively.

C. Boiler Heat Exchanger:

1. The heat exchanger is constructed of stainless steel and shall be capable of handling return water temperatures down to 40ºF without any failure due to thermal shock or fireside condensation. It shall be ASME stamped for a working pressure not less than 160 psig. The water tubes shall have a maximum water volume of 4 gallons per module. The boiler water connections shall be 2” NPT for 399-500 and 2-1/2” NPT for 750-1000. Inspection openings in the pressure vessel shall be in accordance with ASME Section IV pressure vessel code.

2. The boiler shall be designed so that the thermal efficiency increases as the boiler firing rate decreases. The heat exchanger shall be stainless steel construction. Access to the fireside of the thermal modules is available by burner assembly removal. Minimum access opening shall be no less than 6-1/4” diameter circle per thermal module.

3. Each module shall have a dedicated water flow meter installed that is capable of detecting water flow rate and displaying through the boiler’s display board.

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D. Exhaust Manifold, Condensate Trap, and Condensate Neutralizer:

1. The exhaust manifold shall be of polypropylene with a 4” diameter flue connection for 399-500, or 6” diameter for 750-1000. The exhaust manifold shall terminate in a condensate trap. The condensate trap shall have a gravity drain for the elimination of the condensation into an integrated condensate neutralizer.

E. Boiler Controls:

1. The boiler control system shall consist of a master controller (Argus Controller) to which individual thermal module controllers are linked as slaves. The entire system shall be CSA or UL Recognized. Each of the thermal modules controllers shall consist of a combustion safeguard and flame monitoring system. Individual thermal module controllers shall be field replaceable. The combustion safeguard/flame monitoring system shall utilize spark ignition and rectification type flame sensor. The boiler control system shall annunciate boiler & sensor status and include extensive self-diagnostic capabilities.

2. An optional second communications board shall allow third party Building Automation System (BAS) to control and monitor the boiler via Modbus RS-485 communications.

3. Each boiler shall incorporate dual over-temperature protection with manual reset and low water cut out, both in accordance with ASME Section IV and CSD-1.

4. The first four control modes refer to independent boiler settings, while the last control modes refer to banks of boilers operated as a system by AERCO supplied multiple boiler controller (Tekmar 294). The following is a description of each control mode.

F. Internal Setpoint:

1. Boiler shall include integral factory wired operating controls to control all operation and energy input of the boiler. Control of discharge water temperature shall be set through an internal setpoint with an adjustment of 68ºF to 189ºF. The individual thermal module controllers shall vary their respective thermal module’s input throughout its full range to maximize the condensing capability of the boiler.

2. The boiler will operate to maintain a constant pool water temperature. Unit shall operate with an Inverse Efficiency Curve, with known Part Load Value Efficiencies. Maximum efficiency shall be achieved at minimum firing input. Controls shall be fully field adjustable from 68ºF to 189ºF in operation. The boiler shall have LCD display for monitoring of all sensors and interlocks.

G. Controls Interoperability:

1. The communications module shall utilize the MODBUS open protocol to interface with third party Building Automation Systems (BAS).

2. Controls interface with BACnet, and N2 shall utilize an optional AERCO Communications Gateway to act as a MODBUS interface/translator between the boiler and BAS. The AERCO Communications Gateway shall be comprised of a microprocessor-based control utilizing the MODBUS protocol to communicate with the boilers. Non-volatile backup of all point mapping and programs shall be internally provided as standard. Connection between Gateway and individual boilers shall be “daisy chain” with shielded, twisted-pair, low voltage wiring for ease of installation.

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2.2 COMPRESSION TANKS

A. Description: Steel, pressure-rated tank constructed with welded joints and factory-installed, butyl-rubber diaphragm. Include air precharge to minimum system-operating pressure at tank.

1. Available Manufacturers:

a. AMTROL Inc.

b. Armstrong Pumps, Inc.

c. Flexcon Industries.

d. Honeywell Sparco.

e. Myers, F. E.; Pentair Pump Group (The).

f. Smith, A. O.; Aqua-Air Div.

g. State Industries, Inc.

h. Taco, Inc.

i. Watts Regulator Co.

j. Wessels Co.

2. Construction:

a. Tappings: Factory-fabricated steel, welded to tank before testing and labeling. Include ASME B1.20.1 pipe thread.

b. Interior Finish: Comply with NSF 61 barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

c. Air-Charging Valve: Factory installed.

3. Capacity and Characteristics:

a. Working-Pressure Rating: 150 psig (1035 kPa).

b. Capacity Acceptable: 10 gal. (37.9 L) minimum.

2.3 WATER HEATER ACCESSORIES

A. Gas Shutoff Valves: ANSI Z21.15/CGA 9.1, manually operated. Furnish for installation in piping.

B. Gas Pressure Regulators: ANSI Z21.18, appliance type. Include pressure rating, capacity, and pressure differential required between gas supply and water heater.

C. Gas Automatic Valves: ANSI Z21.21, appliance, electrically operated, on-off automatic valve.

D. Combination Temperature and Pressure Relief Valves: Include relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating. Select each relief valve with sensing element that extends into storage tank.

1. Gas Water Heaters: ANSI Z21.22/CSA 4.4.

E. Pressure Relief Valves: Include pressure setting less than working-pressure rating of water heater.

1. Gas Water Heaters: ANSI Z21.22/CSA 4.4.

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F. Water Heater Stands: Water heater manufacturer's factory-fabricated steel stand for floor mounting and capable of supporting water heater and water. Provide dimension that will support bottom of water heater a minimum of 18 inches (457 mm) above the floor.

G. Piping Manifold Kits: Water heater manufacturer's factory-fabricated inlet and outlet piping arrangement for multiple-unit installation. Include piping and valves for field assembly that is capable of isolating each water heater and of providing balanced flow through each water heater.

H. Piping-Type Heat Traps: Field-fabricated piping arrangement according to ASHRAE/IESNA 90.1-2004 or

ASHRAE 90.2-2004.

2.4 SOURCE QUALITY CONTROL

A. Test and inspect water heater storage tanks, specified to be ASME-code construction, according to ASME Boiler and Pressure Vessel Code.

B. Hydrostatically test commercial water heater storage tanks before shipment to minimum of one and one-half times pressure rating.

C. Prepare test reports.

2.5 CIRCULATING PUMP

A. Provide in-line centrifugal pumps of the single stage, vertical split cast back pull-out design, all bronze construction. Construct the pump so that the internals are capable of being serviced without disturbing piping connections.

B. Provide an enclosed type impeller, hydraulically and dynamically balanced and keyed to the shaft and se-cured with a suitable locknut.

C. Furnish the pump with a mechanical seal, with a carbon seal ring and ceramic seat and shaft sleeve un-der the complete wetted area of the mechanical seal.

D. Fit the bearing frame assembly of the pump with oil lubricated, bronze journal bearings and a hardened alloy steel shaft.

E. Provide a flexible coupling, capable of absorbing torsional vibration, between the pump and motor.

F. Provide resiliently mounted motor and equip with oil-lubricated journal bearings through 2 hp and rigidly mounted ball bearings 3 hp and over.

G. Factory test the pumps and thoroughly clean and paint with one coat of machinery enamel prior to ship-ment. Furnish a set of installation instructions with the pumps at the time of shipment.

H. Manufacturers: Dean Pump; Bell & Gossett; Grundfos, Deming; Amtrol; Armstrong; or Taco.

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PART 3 - EXECUTION

3.1 WATER HEATER INSTALLATION

A. Install commercial water heaters on concrete bases.

1.…