15-2003 addendum 1

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    PART B BIDDING PROCEDURES

    REVISEB2 SUBMISSION DEADLINE to read:

    B2. The Submission Deadline is 12:00 noon Winnipeg time, March 13, 2003.

    PART E SPECIFICATIONS

    ADDto E1.1 15005 to 15990 of Mechanical Scope of Work (61 pages attached)

    ADDto E1.1 16005 to 16470 of Electrical Scope of Work (39 pages attached)

    ADDENDUM NO. 1 to TENDER NO. 15-2003Corporate Finance Department

    Materials Management Division

    FIELD SERVICES BUILDING WASH BAY RENOVATIONS 1220 PACIFICAVENUE

    ISSUED: March 3, 2003BUYER: Tami Schirlie, C.P.P. /ts

    TELEPHONE NO. (204) 986-2192

    URGENT

    PLEASE FORWARD THIS DOCUMENT TOWHOEVER IS IN POSSESSION OF THETENDER PACKAGE

    THIS ADDENDUM SHALL BE INCORPORATEDINTO THE TENDER PACKAGE AND SHALLFORM A PART OF THE CONTRACTDOCUMENTS

    Please note the following and attached changes, corrections, additions, deletions, information and/or instructionsin connection with the Tender Package, and be governed accordingly. Failure to acknowledge receipt of thisAddendum in Paragraph 10 of Form A: Tender may render your Tender Submission non-responsive.

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    City of Winnipeg Mechanical Scope of Work Section 15005 Tender No. 15-2003 Page 1

    PART 1 - GENERAL

    1.1 General .1 Include in mechanical section, provision oflabour, new materials, tools, transportation,services and facilities for a completemechanical installation. The installationshall be left complete in all respects andready for operation. Installation shall beinstalled to the complete satisfaction of theresponsible Professional Engineer.

    .2 Provide for the complete installation of high

    pressure washer system including:.1 Gas fired heater w/ side-by-side stand,remote control boxes (2), control panel,prewash system w/ proportioner, modulatnig gasvalve w/ prosafe controls, track and rollersystem, high temperature/high pressureflexible hoses, trigger spray guns (2), watersoftener, chimney w/ power venter..2 Provide 25mm compressed air supply toproportioner (prewash system); coordinate withequipment supplier for quick-connect coupling.Pressure regulator to be provided by PressureWasher Supplier and install 1/4 turn isolationball valve..3 Route new 32mm gas supply (395 Mbhoutput based on 7" w.c. from existing gas main(serving new radiant heaters) to new pressurewasher boiler. Coordinate gas pressure andboiler connection with equipment suppliers..4 Provide for complete installation of newwater softener to mezzainine; coordinate withhigh pressure washer supplier for exactequipment connection locations. Water softenerprovided by Waterite/Filter Soft..5 Route new insulated (PVC jacket) 20mmdomestic cold water from nearest tie-inlocation to new water softener unit, c/w 1/4 -turn isolation ball valve and back flowprevention. Direct water softener backwashdischarge and brine tank overflow hose toexisting funnel floor drain..6 Route insulated (PVC jacket) 20mmdiameter piping from water softener topressure washer soap reservoir, c/w 1/4 - turnisolation ball valve. Provide 1.2 mm flexconnector hose from piping to reservoirconnection ; maximum length of 1.3 0mm.

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    City of Winnipeg Mechanical Scope of Work Section 15005 Tender No. 15-2003 Page 2

    1.1 General .2 (Cont'd)(Cont'd) .6 (Cont'd)

    Coordinate with equipment supplier for exactconnection..7 Provide for complete installation ofchimney flue power venter; coordinate withPressure Washer Supplier for installationdetails. Provide PS chimney from discharge ofpower venter to outdoors..8 Route boiler pressure relief and heatercondensate drain to funnel floor drain..9 Provide for complete installation of50ft. track and roller system to be wallmounted along each side of the washbay. Trackand roller system as manufactur ed by PressureWasher Supplier; coordinate with theappropriate contractor and equipment suppliersfor detailed installation require ments. Eachtrack sy stem to be complete with 3-8'flexible hose loops per 10' track section(total of 120' per side)..10 Provide for installation of hightemperature/high pressure hose from boilerdischarge to hose rack loops and each of twospray wands at ground level. Hose, spraywands, wall hooks, and all associatedcomponents as provided by Pressure WasherSupplier..11 Contractor to allow cost for start-up,commissioning and operating training byPressure Washer Supplier..12 Coordinate with electrical andstructural for wiring installation and trackand roller system installation, respectively.

    .3 Provide for the cmplete installation of

    grease transfer system including:.1 Grease transfer pump w/ filter/pressuregauge, down cover, spring rewind hose reel,100' hose, grease nozzle, compressed air quickconnect..2 One manual air shut off ball valve, onemanual fluid isolation ball valves, new 20mmcompressed air supply to pneumatic pump. Tiein to nearest available existing compressedair supply..3 Locate grease reel/pump at gridline6E/B..4 Install to manufactures recommendations.

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    City of Winnipeg Mechanical Scope of Work Section 15005 Tender No. 15-2003 Page 3

    1.1 General .3 (Cont'd)(Cont'd) .5 Contractor to allow for

    start-up/commissioning and operator trainingby equipment supplier.

    .4 Provide for complete installation of new gas

    fired tube-type radiant heaters:.1 Two radiant heaters c/w glow coil,potted ignition, stainless steel housing,900mm Type-2 double wall gas/propane flexconnectors..2 Sealed combustion kits for each unit;100mm combustion air intakes to extend aboveroof with downward long sweep elbow andbirdscreen. Bottom of intake opening to be900mm above roof. Use existing roofpenetrations where applicable..3 Modify existing gas piping and provideregulator as required to accommodate interconnection of new heaters..4 Space temperature shall be controlledvia space temperature sensor and existingJohnson controls DDC system; modify/extendexisting DDC system, components, andprogramming necessary to provide a fullyoperational system. Provide a weather proofcover and sensor suitable for humidenvironments. An alarm status output signalshall be provided upon failure of radiantheaters. All control wiring to be run in waterproof PVC conduit..5 Provide 150mm chimney flue vent upthrough roof; ensure discharge maintains 3mclearance from intakes.

    .5 Modify/extend existing 500mm supply duct to

    discharge towards main floor level at a45-degree angle . Balance as indicated.

    .6 Existing structural concrete grit interceptor

    to be enlarged from 750x750x1900mm to150x750x1900mm. Modify existing under-slabdrainage system to accommodate new pit sizes.

    .7 Provide new water proof PVC jacket for allexisting insulated domestic water piping;confirm on site exact size and pipe length.

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    City of Winnipeg Mechanical Scope of Work Section 15005 Tender No. 15-2003 Page 4

    1.1 General .8 Provide new 350mm exhaust branch duct c/w(Cont'd) balance damper and birdscreen on intake;

    connect to existing exhaust duct and balanceto air flows indicated.

    .9 Provide for complete installation of a new

    38mm DCW supply to vehicle area:.1 Route new 38mm domestic cold water fromnearest suitable tie-in location (50mm supplyadjacent to Inspec tion Bay 1.24E) c/wisolation ball valve . Extend 38mm to adjacentvehicle storag e bays; provide 38mm drops downto future hose reels column mounted at gridlines 6E, 4E, 2 E, c/w 1/4 turn isolation ballvalves..2 Terminate piping so as to mount futurehose reel 150mm A.F.F.

    .10 Provide new insulated combustionair/ventilation air ducts from roof hoods intowashbay area; extend/install toCAN/CGA-B149.1.

    .11 All piping penetrations at fire wall betweenWashbay and Vehicle/Equipment storage area tobe fire stopped.

    .12 Remove existing ceiling fans and assocaited

    controls; coordinate with division 16 forelectrical disconnection.

    .13 Existing chimney openings in roof notscheduled for reuse shall be sealed watertight (above and below roof line) insulatedand abandoned in place.

    .14 Remove all existing hangers and piping

    abandoned during construction/renovation.

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    City of Winnipeg Mechanical General Section 15010 Provisions Tender No. 15-2003

    Page 1

    1.1 Description of .1 Work of this Division includes providingSystems labour, materials, equipment and service

    necessary for and reasonable incidental to themechanical systems as shown on the drawingsand as described in the following sections:.1 15010 Mechanical General Provisions.2 15180 Insulation.3 15400 Plumbing.4 15800 Air Distribution.5 15900 Controls.6 15990 Balancing

    1.2 Scope of Work .1 Work described in this division shall beperformed in accordance with ArchitecturalSpecification Section 01010 "Summary of Work -Phasing".

    .2 The Contractor shall work under the direction

    of the ContractOrs in constructing themechanical systems in the building structureas outlined on the plans and described in thisspecification.

    .3 The Contractor shall be responsible for

    visiting the site. Examine site, existingbuilding and local condition affecting workunder this contract. The Contractor shall readall contract documents (drawings,specifications, addenda, etc.) including thedocuments of the other disciplines, asrequired to accurately determine the extent ofthe work required by his forces, hiscontractors and other disciplines. TheContractor is expected to have the expertiseto coordinate his work with that of all othercontractors to ensure a completely coordinatedmechanical system. In case of conflictingrequirements, contractors shall be governed bythe most severe interpretation of the contractdocuments. No allowances will be made laterfor necessary changes, unless notification ofinterferences have been brought to theContract administrator's attention, inwriting, prior to closing of tenders.

    .4 The Contractor shall ensure that where

    piping, ductwork, equipment is installed inthe building that ceiling heights and requiredclearances are maintained.

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    1.2 Scope of Work .5 The Contractor shall be responsible for any(Cont'd) cutting or patching required to accommodate

    the work of Contractor.

    .6 Existing Mechanical Systems shall be extendedto accomodate new requirements. Whereconnection to existing systems occurs siteconfirmation shall be necessary to ascertainexisting piping condition prior to connection.If site confirmed that existing pipingconnection cannot be achieved due to poorcondition of existing piping then refer toMechanical Section 15010, Item 1.33.

    1.3 Coordination .1 Coordinate work with work of other sectionsto avoid conflict.

    .2 Locate distribution systems, equipment and

    materials to eliminate interferences, conserveheadroom and leave maximum usable space.

    .3 If interference should occur, Contract

    administrator must review relocation ofequipment and materials regardless ofinstallation order. No installation shallproceed without all trade coordination.

    .4 Make any necessary minor changes or additions

    to runs of ducts or pipes, etc., toaccommodate structural conditions withoutadditional charge or expense to the City ofwinnipeg.

    .5 Alter location of ducts or pipes at the

    direction of the Contract administratorwithout charge to the City of winnipeg, solong as the change is made before installationand does not necessitate additional materials.

    1.4 Regulations .1 Conform with the requirements of the plansand specifications, the local authoritieshaving jurisdiction, related codes, and theManitoba Building Code. In the case ofconflicting requirements, be governed by themost severe regulations.

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    1.4 Regulations .2 Furnish certificates that work installed(Cont'd) conforms to requirements of authorities having

    jurisdiction. All changes and alterationsrequired by an authorized inspector of eachauthority having jurisdiction shall be carriedout without charge or expense to the City ofwinnipeg.

    .3 Provides necessary notices, obtain all

    permits and pay all fees, in order that workspecified may be carried out. Charges andalterations required by Authorized Inspectorof any out without charge or expense to Cityof winnipeg.

    1.5 As-Built .1 Maintain project "as-built" record drawingsDrawings daily and record accurately significant

    deviations from contract documents caused byjob conditions and changes ordered by theContract administrator. Mark "as-built"changes in black on reproducible bond of thecontract documents. One original drawing copyshall be obtained from the Contractadministrator.

    .2 Identify each drawing as "Project Record

    Copy". At all times maintain drawings in goodcondition and make available for on-siteinspection by Contract administrator.

    .3 Submit two sets of record drawings on

    reproducible bond and in electronic formatcompatible with City of winnipeg's system tothe Contract administrator at the completionof the project and prior to final observationand review.

    .4 Ensure all change notices, addenda, site

    instructions, clarifications, etc. areincorporated and detailed on as-built drawingsprior to submittal.

    1.6 Standard of .1 Standard of Acceptance: Where an item isAcceptance specified by manufacturer and model number, it

    means that the item meets the specificationsin all respects regarding performance, qualityof material and workmanship and is acceptable

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    1.6 Standard of .1 (Cont'd)Acceptance to the Contract administrator without

    (Cont'd) qualification. Manufacturers listed as "equal"means that the Contract administrator hasdeemed this manufacturer capable of producingmaterial, fixture or equipment of comparablequality and that the specified item must matchthe specified model number for performance,approximate dimensions, quality of materialand quality of workmanship. If,in the opinionof the Contract administrator, "equal"material submitted for review is notsatisfactory, satisfactory material of theequal manufacturer or the specifiedmanufacturer shall be used.

    .2 "Alternate" means that the Contract

    administrator may deem the manufacturercapable of producing substitute material,fixture, or equipment which will fulfillproject requirements but may differ inmaterial, quality, performance,characteristics, methods of construction ormode of operation. "Alternate method" meansthat the Contract administrator may deem thecontractor capable of providing a substitutewhich will fulfill project requirements butmay differ in material/methods. If, in theopinion of the Contract administrator, the"Alternate method" is unsatisfactory,installation shall be provided in accordancewith materials/methods specified and shown ondrawings.

    .3 Bidders must base their price on specified

    manufacturers or listed equals. Alternates,when allowed must be listed on a separatesheet with amount to be added or subtractedfor each substitution.

    .4 The use of an equal/alternate manufacturer

    shall in no way relieve Division 15 from theresponsibility of furnishing all work that maybe required by reason of different space,weight or electrical requirements from that ofthe specified manufacturer. If, in the opinionof the Contract administrator, such work isnecessary and is not carried out in a mannerwhich will ensure satisfactory operation andperformance of the equipment, then thespecified manufacturer shall be used.

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    1.6 Standard of .5 Request for review from manufacturers ofAcceptance materials, fixtures and equipment who are not

    (Cont'd) listed as equal and wish to be accorded"equal" status, shall be made at least 15 daysprior to close of tender. Such material,fixtures, and equipment shall meet therequirements for an equal as described in theStandard of Acceptance.

    All information required by the Contractadministrator to evaluate the proposal shallbe furnished at the time of the request byproposed manufacturer.

    Note: An "equal" request shall contain thefollowing items:.1 performance data (including all horsepowers, RPM's, electrical characteristics,etc. -as applicable).2 shop drawings of the equipment(including all pertinent dimensions, weights,etc. -as applicable).3 parts lists - where applicable

    *failure to include required data maydelay/negate review of product.

    .6 Review of "alternates" and "alternate

    methods" shall be made after tenders areopened. Submit all information required by theContract administrator to evaluate theproposal immediately after the tenders areopened.

    .7 A list of mechanical equipment manufacturers

    to be used on this project shall be submittedto the Contract administrator within thirty(30) days after award of the Contract. Thislist shall consist of the itemized listsubmitted at the time of tender amended toinclude all accepted alternates.

    .8 Specified, acceptable and alternate

    manufacturers shall provide local servicerepresentation.

    .9 Mechanical systems have been designed with

    the equipment of the specified Manufacturer.The onus shall be on the Contractor inconjunction with the equal or alternatesupplier(s) to ensure that their equipment

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    1.6 Standard of .9 (Cont'd)Acceptance will meet the required performance

    (Cont'd) characteristics, electrical characteristics,as well as fit properly into allotted spaceincluding allowing for the required access andservice spaces. Any additional costs incurredas a result of modifications to the system orroom layout, or modifications required byother trades shall be borne by the Contractor.

    1.7 Shop Drawings .1 A minimum of seven (7) sets of drawings orsepia, and manufacturers data sheets for allequipment and materials necessary to completethe work of Division 15 shall be submitted tothe Contract administrator for his review.This submittal shall include allspecified/equal/alternate products proposedfor use on the project.

    .2 Review of shop drawings is for the sole

    purpose of ascertaining conformance withgeneral design concept of a piece ofequipment. This review shall not mean approvalof the detail design inherent in the shopdrawings, responsibility for which shallremain with the contractor submitting same,and such review shall not relieve thecontractor of his responsibility for errors oromissions in the shop drawings or hisresponsibility for meeting all requirements ofthe contract documents. The contractor isresponsible for dimensions to be confirmed andcorrelated at the job site, for informationthat pertains solely to fabrication processesor to techniques of construction andinstallation and for coordination of the workof all contractors.

    .3 Each drawing shall bear Div. 15 stamp with

    Firm's name, date of review and shall beinitialed by responsible officer of Div. 15.Include name of project, equipment supplierand clause number equipment is specifiedunder. Shop drawings being submitted toContract administrator for review shall bearin addition to Div. 15 review stamp, thereviewed stamp of any associated contractorswhich is providing

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    1.7 Shop Drawings .3 (Cont'd)(Cont'd) service/connection/power/control to shop

    drawing item.

    1.8 Temporary Use of .1 Permanent systems and/or equipment not to beEquipment used during construction period, without

    Contract administrator's written permission.

    .2 Heating systems may be used for temporaryheating within limitations specified underclause "Temporary Heating". Refer also to"General Conditions".

    .3 Equipment used during construction period to

    be thoroughly cleaned and overhauled. Replaceworn or damaged parts so equipment is inperfect condition, to entire satisfaction ofContract administrator and City of winnipeg.

    .4 Provide proper care, attention and

    maintenance for equipment while it is beingused. If, in opinion of Contractadministrator, sufficient care and maintenanceis not being given to equipment and systems,Contract administrator reserves right toforbid further use of said equipment andsystems.

    .5 Temporary use of equipment shall in no way

    relieve Contractor of providing twelve monthguarantee on all equipment so used. Thisguarantee period to commence as of date offinal acceptance of building by City ofwinnipeg as interpreted by Contractadministrator.

    1.9 Electric .1 Electrical equipment shall bear CSA label.Motors and Controls Obtain special inspection labels required by

    Provincial Authority having jurisdiction forequipment that does not have a CSA labeland/or a ULC label.

    .2 Conform to requirements of Canadian

    Electrical Code, local Municipal andProvincial Authorities and specifiedstandards.

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    1.9 Electric .3 Division 16 provide all power wiring,Motors and Controls connections and other electrical items

    (Cont'd) required for operation of mechanical systemsexcept for factory installed wiring andequipment on package units provided byDivision 15 and as specified under Section15900.

    .4 Division 16 provides and installs motor

    starters for electric motors except whereequipment is furnished with integral starters.

    .5 It shall be the responsibility of Division 15

    to supply motors with proper voltagecharacteristics to suit electricaldistribution systems and suitable constructionsuch as explosion-proof, dust-proof, part windstarting, etc., as required to suit operatingconditions. Division 15 is responsible ofcomplete working installation and mustcoordinate all electrical and control work.

    1.10 Building .1 Refer to Section 15900 for generalControl System description.

    1.11 Cutting and .1 The Contractor shall provide the GeneralPatching Contractor with the exact location of proposed

    pipe trenches, roof and wall openings toaccommodate both ducts and pipes in order tominimize the cutting and patching required.Cutting and patching of beams, wall, floorslabs and masonry work, including repairs,necessitated by the work of Division 15 willbe by the ContractOrs.

    .2 Drilling for expansion shields (where

    permitted) hanger rods, brackets and sleevesshall be the responsibility of Division 15, aswell as all costs for drilling, burning andreinforcing steel beams.

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    1.12 Sleeves, .1 Unless otherwise noted, provide pipe sleevesEscutcheons and at all points where pipes pass through walls,Plates floors, partitions and masonry or concrete

    walls and floors.

    .2 Escutcheons and plates: provide on pipespassing through finished walls, partitions,floors and ceilings.

    1.13 Hangers and .1 Suitable hangers, supports, sway braces etc.,Supports and proper installation methods, shall be

    provided for suspension or support of piping,ductwork or equipment. (All joist hangerssupports to be hung from top chord).

    .2 Standard of Acceptance for all hanger

    components shall be Grinnell or equal asdetermined by the Contract administrator.

    1.14 Piping .1 Piping shall be installed straight, parallelRequirements and and close to walls and ceilings as possible,Installation with specified pitch in conformance to all

    applicable codes.

    .2 Refer to Section 15400 for furtherrequirements.

    .3 Drainage: Run piping to main sewers as

    indicated with uniform grade, in accordancewith plumbing code. Trap and vent fixtures asrequired.

    1.15 Ductwork .1 Install equipment and ductwork straight,Requirements and parallel and close to walls and ceiling, withInstallation specified pitch in conformance to SMACNA and

    ASHRAE standards and in conformance to allapplicable codes.

    .2 Refer to Section 15800 for further

    requirements.

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    1.16 Equipment .1 Follow approved manufacturer'sRequirements and recommendations regarding safety provisions,Installation installation methods and easy access for

    inspection, maintenance and repairs.

    1.17 Piping .1 Identify fluids in piping with markersIdentification showing name, pipe size and service, including

    temperature and pressure where relevant, andwith arrows to indicate flow direction.

    .2 Use CGSB 23-GP-3a and CSA B53 colour codings

    and identification systems, using CGSB1-GP-12c Colour Coding System Schedule.

    .3 Standard of Acceptance: WH Brady

    identification tapes, bands, markers.

    .4 Legends and colour classifications: Ifdiffering from Table A in tenderspecification, submit to Contractadministrator for review at least two weeksbefore ordering material. Match existingidentification system.

    1.18 Valves and .1 Provide aluminum or lamacoid tags withControllers stamped code lettering and numbers filled with

    black paint and secured to items. Use forvalves and operating controllers of allsystems.

    .2 Lamacoid tags shall be 1 1/4" x 1" size to

    match existing, and be color coded.

    .3 Contractor shall prepare a complete list ofnew valves submitted to City of winnipeg forreview. City of winnipeg shall review andadvise Contractor of colour and numberingsequence required under this contract.

    1.19 Identification .1 Manufacturer's Nameplatesof Equipment .1 Provide factory supplied and installed

    nameplate on each piece of equipment..2 Provide registration/approval nameplates(ie. CSA, ULC, ASME) in accordance with

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    1.19 Identification .1 (Cont'd)of Equipment .2 (Cont'd)

    (Cont'd) requirements of authorities havingjurisdiction.

    .2 System Nameplates

    .1 Provide labels of approved size and typefor each system with tag schedule, designatingnumber, service, function, colour code, normaloperating position and location of each taggeditem..2 Identify as follows: equipment type andnumber, service or areas or zone of buildingserved.

    1.20 Tests .1 Notice: Give written notice of date when anyand all test will be made, including PipingPressure test, Drainage Systems, Ductwork,Safety Devices etc. Notice must be received bythe Contract administrator 72 hours (minimum)in advance of all testing.

    .2 All tests required to secure the approval of

    the Contract administrator and/oradministrative authorities.

    1.21 Start-up .1 Clean and degrease piping systems afterpressure test are completed and approved, butprior to systems start-up and operation. Thisapplies to all new piping systems and existingsystems that are modified (ie. altered).

    .2 Give Contract administrator written notice of

    date of start-up or commissioning of equipmentor systems.

    .3 Contractor shall be aware that from date of

    equipment or systems commissioning there shallbe a three week stabilization period wherecontractor shall ensure that all systems arefunctioning properly prior to contractadministrator accepting system commissioning.After the three week stabilization period,provide written confirmation that systemstatus is fully compliant with specificationsand site requirements, and is maintainingnormal functions. If this can not be done,

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    1.21 Start-up .3 (Cont'd)(Cont'd) substantial completion shall be delayed

    accordingly.

    .4 Start-up/Commissioning for high pressurewasher shall be performed by the equipmentsupplier; contractor to bear all associatedcosts.

    1.22 Instruction of .1 Furnish factory trained instructors toOperating Staff instruct operating staff in maintenance,

    adjustment and operation of mechanicalequipment, and also instruct personnel ofchanges or modifications in equipment madeunder terms of guarantee to the completesatisfactory of the contract administrator.

    .2 Provide instruction during regular work weeks

    before systems are accepted and turned over tooperating staff for regular operation.

    .3 Review instruction with City of winnipeg's

    representative to ensure a thoroughunderstanding of equipment and its operation.

    .4 Contractor shall submit to Contract

    administrator, suitable document signed byCity of winnipeg or his representative,stating:.1 City of winnipeg has receivedsatisfactory instruction in operation andmaintenance of all equipment and systems..2 Operation and maintenance manuals havebeen reviewed with City of winnipeg..3 Specified spare parts or components havebeen turned over to the City of winnipeg.

    .5 High pressure washer operating instruction

    shall be performed by the equipment supplier;contractor to bear all associated costs.

    1.23 Operation and .1 Submit to the Contract administrator 3Maintenance Manuals hard-covered binders containing a complete set

    of manufacturers' operating and maintenanceinstructions showing all major equipment, andapparatus requiring maintenance for approval.Instructions shall be complete for

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    1.23 Operation and .1 (Cont'd)Maintenance Manuals installation, operation and maintenance and

    (Cont'd) shall include pertinent information such asdetailed drawings and operating curves.Provide a daily, weekly, monthly, and yearlyas applicable maintenance schedule. Spareparts, suppliers lists and addresses shall besupplied. Instructions shall be reviewed withthe City of winnipegs'representative to ensurea thorough understanding of the equipment andits operation.

    1.24 Guarantee .1 Furnish City of winnipeg with manufacturers'guarantees for all equipment.

    .2 Provide a one year warranty (minimum) on all

    equipment, material, workmanship, etc. relatedto this Division. This one year warrantyperiod shall begin on the same date asContract administrator's letter of substantialcompletion.

    1.25 Schedules and .1 The mechanical equipment, schedules, haveAppendices been listed in the appendix.

    1.26 Painting .1 Apply to hangers, supports and equipmentfabricated from ferrous metals at least onecoat of corrosion resistant primer paintbefore shipment to job site. All mold steelsurfaces and piping shall receive primer coatof corrosion resistant paint including thoseitems which are to be covered with finishedpainting and/or insulation system containing avapour barrier.

    .2 Touch-up damaged finished equipment surfaces

    to the satisfaction of the Contractadministrator. Use primer enamel to matchoriginal. Do not paint over nameplates.

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    1.27 Special Tools .1 Furnish one set of all tools required toservice equipment as recommended bymanufacturer.

    1.28 Excavating .1 Perform all work in accordance withBedding and Department of Labour regulation and tenderBackfilling specification regarding shoring, bracing,

    underpinning, excavating, bedding,backfilling, etc.

    1.29 Shut-Down of .1 The Contractor shall receive written consentServices from the City of winnipeg prior to shutting

    off any services as may be required to performthe work.

    1.30 Deficiency .1 Lists of work deficiencies will be issued atList any time. Rectify work to the satisfaction of

    Contract administrator immediately. Ensure allcontractors are notified of relativedeficiencies. Onus is on Contractor tofollow-up with written confirmation that allitems have been addressed and if not reasonand estimated resolution time frame.

    1.31 Acceptable .1 Following Appendix of Manufacturers listsMaterials and materials of and materials Equipment acceptEquipment able to Contract administrator, subject to

    individual clauses under the varioussubsections of Mechanical Work Specifications.See items "Material" under this section ofspecification.

    .2 Product noted in individual specification

    clauses is an item that meets specification inall respects regarding performance, quality ofmaterial and workmanship, and is acceptable toContract administrator without qualification.Equipment proposed from other manufacturerslisted as "Approved Manufacturer's" andalternates shall meet same standards.

    .3 Contractor to submit within forty-eight hours

    of notification from Contract administrator,

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    1.31 Acceptable .3 (Cont'd)Materials and one (1) copy of fully and properly completedEquipment Appendix of Manufacturers listing thereon

    (Cont'd) names of manufacturers of products which shallbe used to execute work of Contract. If listis not submitted within 48 hours, Contractormust use product named in each individualcase.

    .4 Submit shop drawings for all items marked

    with asterisk(*).

    1.32 Equipment or .1 InsulationMaterial & Approved .1 Pipe insulation* J-M; Fibreglass; Atlas;Manufacturers Knauf; Pabco.

    .2 External Duct Insulation* J-M;Fibreglass; Knauf..3 Fire Retardant canvas* Fattal; Radley..4 Adhesive* Swift; Bakelite..5 Lagging* Flintguard; Bakelite.

    .2 Vibration Control

    .1 Vibration Control products*Vibro-Acoustics; Airmaster; Vibron.

    .3 Plumbing

    .1 Drainage of Waste.1 Cast iron soil pipe Titan;Associated; Bibby.

    .2 Valves (water) Same as for heating.

    .3 Valves* (gate and globe) Jenkins; Crane;Lunkenheimer; Toyo..4 Valves (Butterfly)* Keystone; Jenkins;Grinnell; Victaulic, Kurimoto..5 Hangers & Supports Grinnell; Crane;Myatt.6 Alignment Guides Adsco; Flexon; Fulton;Yarway.7 Drainage specialties Ancon; Zurn; (floordrains, roof drains, cleanouts, chair carriersetc.).8 Dielectric unions Watts; Epco.9 Shock absorber* Zurn; Ancon;.10 Strainers Spirax-Sacro; Erwel;.11 Expansion joints* Fulton; Flexon;Vitaulic.12 Wall hydrants* Zurn, Ancon;.13 Gas cocks* Mueller; Rockwell.14 Gas regulators* Fisher

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    1.32 Equipment or .3 (Cont'd)Material & Approved .15 High pressure washer equipment* MagikistManufacturers .16 Grease transfer equipment Samson

    (Cont'd) .17 Water softener *Magikist

    .4 Air distribution.1 Ducturns, damper hardware, fanconnections* Duro-Dyne; Duct Sealer*Duro-Dyne; 3M; Bakelite

    .5 Controls/Instrumentation

    .1 Temperature Control system; *JohnsonControls-Metasys

    .6 H.V.A.C. Balance And Testing

    .1 H.V.A.C. Balance & Testing Agency *AirMovement; DFC; AHS

    1.33 Liability .1 Install work in advance of concrete pouringor similar work. Provide and set pipe sleevesas required.

    .2 Install concealed pipes and ducts neatly,

    close to building structure so furring isminimum size. Pipes, ducts and equipmentinstalled improperly, to be removed andreplaced without cost to City of winnipegs.

    .3 Protect and maintain work until building has

    been completed and accepted. Protect workagainst damage during installation. Cover withfloor and wall surfaces resulting fromcarrying out of work, without expense toCity of winnipegs.

    .4 During welding or soldering ensure structure

    is protected against fire shield withfire-rated sheets and galvanized iron sheets.Mount portabe fire extinguishers in welding orsoldering areas.

    .5 Coordinate work with other sections to avoid

    conflict and to ensure proper installation ofall equipment. Review all contract drawings.

    .6 On completion of work, remove tools, surplus

    and waste material and leave work in clean,perfect condition.

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    1.33 Liability .7 Protect and defend City of winnipegs in full(Cont'd) and free use of a device which may be applied

    as part of work, either in its constructon oruse after completion.

    1.34 Openings in Fire.1 Provide firestopping for all openings in fireSeparations separations for passage of pipes, ducts, etc.

    to maintain integrity of fire separations.

    .2 Firestopping.1 Firestopping to be Dow-Corning Fire StopSystem..2 Material shall be Dow-Corning siliconeelastomer Fire Stop penetration Seal and/orDow-Corning liquid silicone elastomer FireStop Foam of density, width and depth tomaintain assembly fire resistive rating..3 Components shall be ULC listed.

    .3 Installation

    .1 Prepare all surfaces so they are clean,dry, and frost free, as per manufacturer'spublished recommendations..2 Use Sealant around single pipes and/orducts..3 Use Foam for multiple pipe installation..4 Follow manufacturer's publishedinstallation instructions precisely includingfield quality control after installation..5 Contractor shall submit to Contractadministrator, suitable document signed by themanufacturer or his representative, stating:

    .1 Contractor has received sufficientinstallation instruction from themanufacturer or his representative..2 Manufacturer or his representativewitnessed installation procedures onsite.

    .6 Contractor shall remove firestoppingassembly for random inspection by Contractadministrator or their representative, andreplace at no extra cost to City of winnipeg.

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    1.35 Welding .1 Do not weld when temp. of base metal is lowerRegulations than -17 degrees C except with the consent of

    Contract administrator. At temp. below 0degrees C, surface of all areas withing 75mm(3") of point where weld is to be started, isto be heated to temp. at least warm to thehand before welding is commenced. At all temp.below +4 degrees C, operator and work to beprotected against direct effect of wind andsnow.

    .2 Welding performed by welder holding current

    welder's certificate from ProvincialDepartment of Labour.

    .3 Comply with fire protection standard #302

    latest revision, for welding and cuttingoperations, issued by Dominion FireCommissioner.

    1.36 Commissioning .1 Contractor shall be responsible for the& Demonstration performance and commissioning of all equipment

    supplied under the H.V.A.C. Sections of Div.15. Commissioning is the process of advancingthe installation from the stage of staticcompletion to full working order to specifiedrequirements. It is the activation of thecompleted installation.

    .2 Assign direct overall charge of commissioning

    to a person (the commissioning coordinator)fully qualified through practical experienceand a comprehensive knowledge of theinteractive nature of building systems andtheir controls to understand the completesystem and be available to carry the projectthrough total completion. This person, aPrincipal or an employee of the MechanicalContractor or hired from an outside source,shall be responsible for Commissioning,Demonstration to the City of winnipeg andContract administrator and Certifications ofSubstantial and Total Performance.Commissioning of high pressure washer systemshall be by equipment supplier; contractor tobear all associated costs.

    .3 Submit a schedule for the commissioning phase

    of the work. This schedule shall show:

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    1.36 Commissioning .3 (Cont'd)& Demonstration .1 completion dates for each trade in each

    (Cont'd) major section of the building..2 submission dates for the variousdocuments required prior to substantialcompletion..3 timing of the various phases of thecommissioning, testing, balancing anddemonstration process.

    .4 Commissioning is concluded when systems have

    been balanced and the installation is in fullworking order and acceptable for use. The workwill include the following:.1 Position all balance dampers inductwork..2 make provisions for testing airpressures and flow rates..3 set up air diffusers, registers andgrilles for optimum distribution/comfort..4 set up and test all alarm and protectivedevices.

    .5 At the conclusion of commissioning,

    demonstrate the operation of the system. Thisdemonstration shall include:.1 operation of all alarm and protectivedevices..2 operation of all equipment and systemsunder each mode of operating including, butnot limited to: automatic controls, radiantheaters, pressure washer system, greasetransfer system.

    .6 At the completion of commissioning, testing,

    balancing and demonstration submit thefollowing to the Contract administrator:.1 a letter certifying that all workspecified under this contract is complete,clean and operational in accordance with thespecification and drawings..2 record drawings as specified..3 Provincial Gas Inspection Dept.approval..4 a letter from the testing and balancingagency certifying that all necessary data forinclusion in operating and maintenance manualshas been received..5 a list of all alarm and protectivedevices tested, with the final operatingsettings.

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    PART 1 - GENERAL

    1.1 Related Work .1 Painting Section 09900Specified Elsewhere

    .2 Mechanical General Provisions Section 15010

    .3 Plumbing Section 15400

    .4 Air Distribution Section 15800

    1.2 Description of .1 Provide insulation on the following systems:System

    .1 Domestic cold water lines.

    .2 Domestic hot water supply and recirc.lines..3 Outdoor air ductwork and plenums..4 Exhaust and relief air ductwork..5 Miscellaneous drain lines..6 The repair and/or replacement of pipeinsulation on existing lines connectionpoints..7 Insulate existing chimney openings, sealwater tight above and below roof level.

    .2 Provide covering of insulation materials, ie.

    A.S.J., canvas, aluminum, PVC Jacketing, wherespecified. *All piping to be insulatedwaterproof jacket required on all new andexisting piping insulation within washbayarea. Insulated ducts to be canvas wrapped andmastic coated.

    .3 Prepare insulation surfaces to receive primer

    and finish painting.

    .4 Insulation protection shields shall not beused.

    .5 Insulate between protection saddles and

    piping.

    .6 All final pipe and duct installationsincluding insulation, covering and adhesiveshall have a flame spread rating of notgreater than 25.

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    1.3 Reference .1 Conform with the requirements of the plansStandards and specification the local authorities having

    jurisdiction and the Local Building Codes. Inthe case of conflicting requirements, begoverned by the most severe regulations.

    .2 Use latest edition of all referenced codes,

    standards, regulations, etc.

    1.4 Definitions .1 "Exposed pipe" or "exposed ductwork": pipeand ductwork in finished spaces.

    .2 "Concealed spaces": Furred spaces, pipe and

    duct shafts; unheated spaces immediately belowroofs; spaces above furred ceilings; concealedspaces over unexcavated areas, andcrawlspaces.

    .3 "Finished space": other spaces, including

    enterable chases, service cores, crawlspaceand equipment rooms.

    1.5 Samples .1 If requested by administrative authority orContract administrator, supply completeassembly of each type of insulation system, on1" plywood board. Affix type written labelbeneath sample indicating service.

    1.6 Shop Drawings .1 Submit shop drawings in accordance withSection 15010.

    .2 In addition to items noted in Section 15010,

    submit manufacturer's catalogue informationrelating to the following:.1 Installation techniques for pipe,fittings and valves..2 Jointing recommendations..3 Recommended adhesives.

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    PART 2 - PRODUCTS

    2.1 Materials .1 Meet NFPA Standard 90A-1990, and 255-1990:UL-723-1971 and 465-1972 unless non-conformingmaterials have been approved by the authorityhaving jurisdication for special applicationsand meet with the acceptance of theContract administrator.

    .2 Underwriters' Laboratories of Canada label or

    satisfactory certified report from approvedtesting laboratory is required to indicatethat fire hazard ratings of materials proposedfor use do not exceed those specified.

    .3 Flameproofing treatments subject to

    deterioration due to effects of high humidityare not acceptable.

    .4 Contract administrator reserves right to

    demand test samples of insulation systems andindividual system components for fire hazardtest rating. Be responsible for cost of alltesting.

    2.2 Compatibility .1 Provide adhesives, sealers, vapour coating,of Components mastics, laggings and bedding compounds, which

    are compatible with materials to which theyare applied. Use components which shall notsoften, corrode or otherwise attack othercomponent material in either wet or dry state.Use materials recommended by manufacturer ofinsulation as suitable for applicationproposed. Apply all materials within ambienttemperatures recommended by manufacturer.

    2.3 Standard of .1 Insulation materials: Only materialsAcceptance conforming to paragraph 2.1 are acceptable for

    use on this project.

    .2 Coatings, sealers and adhesives: BenjaminFoster Co.; Minnesota Mining and Mfg. ofCanada Ltd.; The Flintkote Co.; Jacob andThompson; Duro-Dyne.

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    2.3 Standard of .3 Caulking compound: The Tremco ManufacturingAcceptance Co; Thiokol; Canadian Hanson & Van Winkle Co.

    (Cont'd) Ltd.; Benfamin Foster Co.

    .4 Tape: Arno Dr. School's Tape Division; 3M;Duro-Dyne.

    .5 Prefabricated fitting and equipment

    insulation, demountable: Insulacoustics Ltd.,Ottawa.

    2.4 Thermal .1 Provide:Insulation .1 CGSB 51-GP-9c: Mineral fibre sleeving

    for piping and round ducting. Maximumtemperature 204 degrees C..2 CGSB 51-GP-10b: Mineral fibre, block orboard for ducting, machinery and boilers.Maximum temperature 232 degrees C..3 CGSB 51-GP-11a: Mineral fibre, blanket,for piping, ducting, machinery and boilers..4 CGSB 51-GP-38: Cellular glass, pipecovering, blocks or boards.

    2.5 Accessories .1 Wire.1 Vapour barrier insulations: stainlesssteel wire 18 gauge, dead soft annealed, type304..2 Otherwise: galvanized annealed wire 15gauge.

    .2 Mesh

    .1 Vapour barrier insulation: 25 mm (1")hexagonal mesh, 20 gauge, type 304 stainlesssteel or monel..2 Otherwise: 25 mm (1") hexagonal mesh, 15gauge galvanized annealed wire.

    .3 Stainless steel skewers: 6d stainless steel

    nails.

    .4 Weld pins 3 mm (1/8") x 25 mm (1") x 30 mm (11/4") rectangular ms, pins with 15 mm (5/8")hole at projecting end.

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    2.5 Accessories .5 Stainless steel strap 12 mm (1/2") by 0.55 mm(Cont'd) type 304, dead soft.

    .6 Aluminum strap 12 mm (1/2") x 0.55 mm.

    .7 Velcro straps with standard buckles. Standard

    of Acceptance: Canadian Velcro Ltd.

    .8 Top and bottom equipment supports:galvanized, slotted steel with 25 mm (1") x 6mm (1/4") slots for wire or strap attachment.

    2.6 Covering .1 PVC:.1 Piping exposed to moisture, outdoorinstallations:

    .1 Provide PVC pipe and fittingjacketing c/w solvent weld sealer..2 Meets 25/50 flame and smoke ratingand all applicable codes or regulations..3 Color finish to suit applicationarea..4 Standard of acceptance: Knauf ProtoPVC fitting and pipe jacketing.

    .2 Aluminum to CSA HA.4-1968.

    .1 Piping exposed to moisture and/ormechanical damage: factory fabricated jackets,0.40 mm thick with longitudinal slip jointsand aluminum alloy or stainless steel buttstraps with mechanical fasteners..2 Jackets on fittings, 0.40 mm thick, dieshaped components of alloy with factoryattached protective liner on interior surface.

    .3 Canvas:

    .1 Equipment in Mechanical and EquipmentRooms and exposed piping and ducts: compact,firm, heavy, plain weave cotton fabric, 205g/m2 minimum, U.L.C. listed..2 Use 99 g fitting cotton on concealedvalves and fittings for plumbing and heating.Use U.L.C. listed materials..3 Seal all canvas with lagging adhesive inpreparation for painting.

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    2.7 Facing .1 Provide to CGSB 51-GP-52 vapour barrierMaterials jacket and facing material for pipe, duct and

    equipment, thermal insulation. Type 1: Highpuncture resistance. Type 2: Moderate punctureresistance.

    .2 Standard of Acceptance: Canadian

    Johns-Manville Flamebar, WFB and BFBalumi-seal "Zero-Perm".

    2.8 Lagging .1 Apply lagging adhesive for lagging canvas toAdhesives insulating or finishing cement on calcium

    silicate and hard finished cement surface.

    .2 Standard of Acceptance:.1 Permastik 2001, or Sealfast 30.36..2 Provide vapour barrier mastic BenjaminFoster 82-07, Flintkote 230-04 where required.

    2.9 Weatherproofing .1 Provide silicone based heat resistantand Moisture Proof caulking, set into fabric reinforcing clothCaulking extending 75 mm each side of caulk line, at

    flashings, wherever weather barrier joint isrequired and at expansion joints.

    .2 Nonsetting sealer for sliding insulation

    surfaces shall meet US Federal Specification,TT-S-0227E; Standard of Acceptance: Tremco(Dymeric); Thiokol.

    .3 On exterior of insulated piping, use white

    petroleum jelly between slidingcircumferential surfaces made of 75 mm to 150mm wide 0.55 mm aluminum bands forming topshield and slip shield. Standard ofAcceptance: Vaseline.

    2.10 Piping, Duct .1 Piping Note: Runouts - denotes piping 50 mmand Equipment (2") and less in size, 3.6 M (12'-0") or lessInsulation System in length.

    Use fibreglass with a minimum of nominaldensity of 88.3 Kg/M3 (5.5 lbs per cubicfoot).

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    2.10 Piping, Duct .2 Ductsand EquipmentInsulation System

    (Cont'd)

    Use board and blanket with minimum nominaldensities of 48 Kg/M3 (3.0" per cu. foot) and1.2 Kg/M3 (0.75" per cu. foot) respectively.

    PART 3 - EXECUTION

    3.1 Preparation .1 Confirm systems have been hydrostatically andpressure tested and are acceptable to theContract administrator prior to commencementof any work.

    .2 Ascertain all surfaces to be covered are

    clean and dry and all foreign material, suchas rust, scale, dirt, etc. has been removed.

    .3 Clean and degrease piping, hanger rods, etc.,

    as required to assure proper adhesion ofinsulation materials.

    .4 Ensure all ferrous surfaces have received

    coat of rust penetrating protective paintbefore applying any insulation system whichincludes vapour barrier.

    .5 Ensure that insulation is clean and dry

    during installation and application of allfinishes.

    .6 Do not apply or finish any insulation if

    ambient temperture of space is less than 13degrees C.

    3.2 Workmanship .1 Work shall be performed by licensedjourneymen.

    .2 Install insulation with smooth and even

    surfaces, with round shapes laid to truecircular and concentric shape, shaped to blendwith fitting insulation and adjacent covering,with full length section and tight toinsulated object.

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    3.2 Workmanship .3 Apply insulation materials, accessories and(Cont'd) finishes in accordance with manufacturer's

    recommendations.

    .4 Preformed insulation: sectional up to 300 mm(12") ips, sectional or curved segmented above300 mm (12") ips. With multi-layeredinsulation, use staggered butt jointconstruction.

    .5 Supports:

    .1 Where pipe hangers are in direct contactwith the pipe, treat pipe hanger and pipeassembly as a fitting..2 Vertical pipe over 50 mm (2"): useinsulation supports welded or bolted to pipedirectly above lowest pipe fitting. Thereafterlocated on 5 M(16'-0") centres (minimum) or ateach floor penetration, whichever is less, andat each valve or pair of line flanges..3 Space insulation and support formovement of piping at least 25 mm (1") whereno provision for expansion/contraction hasbeen made.

    .6 Secure insulation where provisions are not

    stipulated in manufacturer's recommendationsor otherwise specified..1 For pipe, ductwork or equipment with 300mm (12") o.d. or less, including thickness ofinsulation, secure insulation with wire..2 For pipe, ductwork or equipment witho.d. of more than 300 mm (12") includingthickness of insulation, secure inner layersof insulation with wire and secure outsidelayer of insulation with straps..3 For pipe, ductwork, or equipment, of anysize, with metal jacketing, secure innerlayers of insulation with wire and metaljacket with straps..4 For Items .2 and .3 above, filament tapemay be used in lieu of wire only..5 Do not compress insulation.

    .7 Install insulation expansion joints every 6m

    (maximum) on expansion loop portion of pipingsystems and every 15m (50'-0") (maximum) onuninterrupted straight pipe or duct in bothhorizontal and vertical. Terminate singlelayer and each layer of multiple layers instraight cut. Leave space of 25mm (1") between

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    3.2 Workmanship .12 Piping:(Cont'd)(Cont'd) .2 Terminate insulation at each end of

    unions and flanges on low temperature systems,at pipe hangers, and at other points whererequired, with insulation cement, to CGSB51-GP-6, trowelled on bevel..3 Allow for radial expansion of pipe andpermit pipe to move longitudinally insideinsulation and to expand and contract withoutopening up joints between sections..4 Gouge out insulation for proper fitwhere there is interference between weld beadand insulation. Insulation shall be bevelledaway from studs and nuts to permit theirremoval without damage to insulation, andshall be closely and neatly trimmed aroundextending parts of pipe saddles, supports,hangers and clamp guides and sealed withinsulating cement.

    3.3 Insulation .1 Insulate: plumbing and domestic water piping..1 All domestic hot fittings and equipment.

    .1 Use either .1 or .2 whichever islonger.

    .1 From exterior penetration(building insulation location) for adistance of 3 M (10'-0") intointerior of building..2 From exterior penetration(building insulation location), allhorizontal piping and vertical dropfrom horizontal piping to floorpenetration..3 Any horizontal or verticalpiping in cold spaces.

    .2 Fittings: expansion joints, flanges,unions, valve bodies up to gland bonnets.Type: oversided demountable hinged type withmetal jackets.

    .2 Insulate: heating, ventilating and air

    conditioning ductwork systems:.1 Outside air intake and combustion airductwork.

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    3.4 Insulation of .1 All fittings, except where noted:Fittings Flanges, .1 Up to and including 50 mm (2");Valve Bodies & Duct insulating cement CGSB 51-GP-6a with embeddedCovering cotton jacket.

    .2 65 mm (2 1/2") and larger; build up endsof insulation on piping with preformed pipeinsulation, block insulation, prefabricatedcellular glass by wrapping with strips offibrous glass blanket to CGSB 51-GP-11a tosame thickness and type as adjoining pipeinsulation..3 Vapour seal ends of insulation withpressure sensitive, vapour barrier adhesiveand polyethylene tapes..4 Fasteners: per manufacturer'srecommendations or as otherwise specified..5 Finishes:

    .1 Embed cotton jacket in wetfinishing cement CGSB 51-GP-7a..2 Provide glass fibre reinforceddraft foil laminate vapour barrier (FSK)rated 0.02 perms; having 50 mm (2")overlap on longitudinal joints. Wrap butttransverse joints with 100 mm (4") wideband of vapour barrier jacket. Seal lapsand bends with pressure sensitive vapourbarrier, adhesive or with mastic..3 Coat so that glass fabric isembedded and sealed in vapour barrier,mastic. Overlap minimum of 50 mm (2").Overall, seal with polyethylene tapeusing vapour barrier adhesive.

    .2 Prefabricated cellular glass:

    .1 Provide thickness equal to that ofinsulation on adjoining pipe..2 Provide 250 mm (10") x 250 mm (10") openweave mesh glass cloth overlapping 150 mm (6")onto adjoining pipe, on coating of tackyvapour seal lagging adhesive; before firstcoat is dry apply second coat of vapourbarrier adhesive..3 Provide for slip pipe expansion joints,with metal liner and removable insulationcover access holes with removable panels..4 Vapour seal protruding metal parts:valve stems, sliding parts of mechanicalexpansion joint insulating covers: provide 1.5mm thick rubber or neoprene gasket betweenpipe support shield and insulation.

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    3.4 Insulation of .3 Duct covering: cover exposed ductwork, asFittings Flanges, shown, seams to be lapped at least 50 mm (2")Valve Bodies & Duct and located where least visible, usingCovering adhesive lagging to secure overlapping edges.

    (Cont'd) Provide over vapour barrier or coating.

    3.5 Ductwork .1 Adhere rigid insulation and flexibleinsulation for flat portion of duct over 600mm (24") wide, to duct surface with insulationadhesive and welded pins. Apply adhesive in150 mm (6") wide strips at 300 mm (12")maximum spacing. Locate welded pins at 300 mm(12") maximum spacing and secure to duct withwelding gun. Use minimum of two rows offastener per side. Use welding procedure whichwill not distort duct nor burn through ordestroy duct finish, but which will developfull strength of pin. Pin sizes shall be asrecommended by insulation manufacturer fortype and thickness of insulation specified.Impale insulation over pins and secure withsuitable speed washers or clips. Removeprotruding ends of welded pins flush withwashers or clips. Remove protruding ends ofwelded pins flush with washers. Restore vapourbarrier where pierced by pins with patchesmade from same material as vapour barrier andsecure with vapour proof adhesive or usepressure sensitive vapour barrier tape. Whereinsulation is installed on panels or ductworkwith standing seams of flanged joints,insulation shall be butted tightly against andnot over seam or flange.

    .2 Where rigid fibrous glass duct insulation is

    used, moulded block or board insulation shallbe sized or cut, bevelled and scored toprovide complete and tight fit to ductsurface.

    .3 Adhere and seal laps of vapour barrier jacket

    or vapour barrier strips of 100 mm (4")minimum width furnished with insulation withvapour proof adhesive.

    .4 Insulation on casings, fan and exposed

    ductwork shall have all voids, cracks, etc.,pointed-up with insulating cement to leavesmooth and even surface with 50 mm (2") x 50

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    3.5 Ductwork .4 (Cont'd)(Cont'd) mm x 0.40 mm protective aluminum corners

    secured with tape until canvas covered.

    .5 Duct Covering:.1 Cover exposed ductwork with 170 g canvascovering using adhesive lagging to neatlysecure overlapping edges. Canvas shall be overany vapour barrier jacket or coating specifiedand all seams shall be lapped at least 50 m(2")..2 Locate seams where least visible.

    3.6 Sizing .1 Coat canvas covering exposed in finishedspaces with diluted coat of lagging adhesiveas recommended by insulation manufacturer.

    3.7 Moisture .1 Provide PVC covering over all pipe insulationProofing exposed to moisture.

    .2 Use same materials as specified for pipeexposed to mechanical damage except thatjoints and seams shall be made watertight. UseSilicone sealant or manufacturer approvedproduct.

    END

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    PART 1 - GENERAL

    1.1 General .1 All General Conditions, Mechanical GeneralSections and General Requirements of theContract Documents shall govern this sectionof the Specifications.

    .2 Related work elsewhere:

    .1 General Conditions Section 15010

    .2 Insulation Section 15180

    1.2 Description .1 The following is a general description of theof Work work involved:

    .2 -sanitary drainage system-cold water system-high pressure washer system-water softener-grease transfer system-gas piping modification/extension/removal-compressed air system modification

    1.3 Codes, .1 Installation and workmanship shall conform toStandards and the following standards:Approvals -National Building Code 1995

    -Manitoba Plumbing Code 1995

    1.4 Temporary .1 The plumbing equipment and systems shall notUsage of Plumbing used be without the written permission of theEquipment Design Authority and in no circumstances shall

    be used prior to testing and inspection.

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    PART 2 - PRODUCTS

    2.1 Drainage .1 Underground Sanitary and Storm below buildingPipe & Fittings - slab: -Acrylonitrile-Butadiene-Styrene DrainInside Building Waste and Vent (ABS-DWV) pipe fittings

    conforming to CSA B181.1-1973. -PolyvinylChloride (PVC) drain waste and vent pipe andpipe fittings conforming to CSA B181.2-1973.Note: transition to C.I./P.V.C. shall be belowslab.

    .2 Soil, Waste, Vent Stacks, and Drains above

    slab:

    .3 Note: -class 4000 mechanical joint cast ironsoil pipe and mechanical joint couplings shallbe of one manufacturer. -PVC piping shall beallowed below slab only.

    2.2 Domestic .1 Hot and Cold above and below slab: - Type 'L'Water Piping & hard drawn copper tubing ASTM B-88 3rd partlyFittings - Inside certified, with cast brass or wrought copperBuilding streamline fittings and 95.5 silver solder

    joints.

    2.4 Grading & .1 Grade all water supply piping so that it canDraining of Piping be drained through drain cocks or fixtures.

    .2 Horizontal sanitary and storm drains shallhave a fall of not less than 1% for 4" (100mm)or larger & 2% for piping 3" (75mm) and under.

    .3 All vent pipes shall be graded to drain back

    to soil or waste pipes.

    2.6 Water Hammer .1 Provide arrestors to Plumbing and DrainageArrestors (shock Institute Standard PDI WH 201 on branchabsorbers) supplies to each fixture or group of fixtures,

    at each quick closing valve and whereindicated.

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    2.6 Water Hammer .2 Size of arrestors to PDI WH 201.Arrestors (shockabsorbers) .3 Standard Acceptance: Ancon series or equal as

    (Cont'd) manufactured by Enpoco, Antrol Diatrol, orZurn.

    .4 Any location requiring a water hammer

    arrestor shall have a Crane 9202 (or equal)ball valve installed directly under thearrestor. Provide suitable acces panel todevices.

    2.7 Air Vents .1 Provide automatic float type air vents at allhigh points of water system.

    .2 Provide shut-off valve in piping air vent.

    .3 Provide indirect drain line form air vent to

    discharge to closest accepted point ofdischarge.

    .4 Any location requiring an air vent shall have

    a Crane 9202 (or equal) ball valve installeddirectly, under air vent. Provide suitableaccess panel to devices.

    2.8 Flanges & .1 Install unions or flanges on all connectionsUnions to reducing valves, control valves, fixtures,

    and equipment.

    .2 Unless otherwise noted, connections up to andincluding 2" (50mm) size shall have unions.

    .3 Larger connections shall be flanged.

    2.11 Temperature & .1 Scope: -Equipment as required.Pressure ReliefValves

    .2 Design: -Watts A.S.M.E. rated.

    .3 Noted: -pipe T & P valve full outlet size tofloor drain and arrange to preventsplash-over.

    .4 Acceptable Manufacturers: -Cash Acme watts

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    2.13 Hangers & .1 Hanger Supports: -carbon steel constructionSupports

    -adjustable for proper grading-rods (in accordance with A.N.S.I. B-31).Cadmium plated continuous thread.-Grinnell Fig. 146 or Myatt Fig. 434-all support rods, nuts, etc. shall beImperial measure.-Hanger types:-up to (25mm) 1" Grinnell Fig. 269 or MyattFig. 120:(32mm) 1-1/4" and larger GrinnellFig. 260 or 65, Myatt Fig. 122 or 124-hangers for copper pipe shall be copperplated, plastic dipped, or pipe wrapped withPolyken tape at hangers.-Maximum Hanger Spacing: (maximum spacing for

    cast iron is 1.5m).

    NPS Pipe Rod Diam. Steel Copperup to 3/4" 3/8" 6'-0" 6'-0"1" to 1 1/4" 3/8" 8'-0" 6'-0"1 1/2" to 2" 3/8" 10'-0" 8'-0"2 1/2" to 3" 1/2" 12'-0" 8'-0"

    .2 Wall Supports: -horizontal pipe adjacent to

    wall -angle iron wall brackets with specifiedhangers -vertical pipe adjacent to wall-exposed pipe wall guide, Grinnell Fig. 235 or236 -channel type supports (Brundy, CanadianStrut, Cantress or Unistrut).

    .3 Floor Supports: -do not support piping from

    the floor unless specifically indicated.Vertical pipe: -risers where they pass throughfloors - standard riser clamps, Grinnell Fig.261 or Myatt Fig. 182, for copper use GrinnellFig. CT-121.-base or risers where they are adjacent to andabove floor slabs, adjustable fabricated steelfloor supports.

    .4 Inserts, Anchors and Beam Clamps: -selected

    for application and load (Grinnell or Myatt).-do not use explosive type inserts unlesspermitted by the Contract administrator.

    .5 Note: -all piping running below structured

    slab shall be hung from slab-on insulated piping where the insulation iscalled to have continuous vapour barrier,install oversized hangers and insulation

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    2.13 Hangers & .5 Note:(Cont'd)Supports protection shields with gauges and lengths as

    (Cont'd) recommended by manufacturer. -hangers andsupports for gas piping shall be in accordancewith the National Standard of Canada "NaturalGas Installation Code" CAN 1-B149.M-91. SeeSchedule A at end of this section.

    2.14 Pipe Sleeves .1 Pipe penetration through fire separations& Escutcheons required to have a Fire Resistance Rating.

    .2 Interior Partition (drywall).

    .3 Interior concrete or block walls: -Schedule40 steel pipe sleeve -removable plasticsleeve.

    .4 Penetration through fire separations not

    required to have a Fire Resistance Rating.

    .5 Interior walls other than concrete or blockwalls: 0.61mm (24 gauge) galvanized steelsleeve.

    .6 Interior concrete or block walls and floor

    slabs (dry areas): Schedule 40 steel pipesleeve. Removable plastic sleeve.

    .7 Outside walls, roof slabs and floor slabs

    (wet areas): Schedule 40 steel pipe sleeve.

    Note:-supply and installation of pipe sleeves isincluded in this section of the work.-sleeves shall be concentric with pipe.-size sleeves to allow for continuity ofinsulation in all areas.-extend sleeves 2" (50mm) above floor slabs inall areas.-extend sleeves through outside walls 1"beyond exterior face.-caulk sleeves through outside walls withflexible caulking compound.-install chrome plated escutcheon plates onexposed piping passing through walls, floorsand ceilings in finished areas. Secureescutcheon plates to walls, floors, etc. withsilicone on back of plate.-sleeves shall be sized to accomodate

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    2.14 Pipe Sleeves .7 (Cont'd)& Escutcheons

    (Cont'd)

    insulated piping where applicable.

    2.15 Valves .1 Scope: Water Service -each single item ofequipment -where indicated on the drawings

    .2 Scope: Cold Water Service

    .3 Gate - 125 psig (861.8 KPA) shut-off: Flanged

    ends 2 1/2" (64mm) and larger; Crane 465-1/2,Jenkins 404, Lunkenheimer 1430C, Red & White421A.

    .4 Ball - 125 psig (861.8 KPA)- shutoff: Screwed

    end joints 2" (50mm) and smaller -WattsB-6000, Apollo-70 series, Jenkins-1101-T,Crane 93-TF, Nippco, T-580-BR, Worcester4211-RT, Red & White Fig. 5044A.

    .5 Check - 125 psig (861.8 KPA) - horizontal:

    Screwed end joints 2" (50mm) and smaller-Crane 37, Jenkins 92, Lunkenheimer 2144, Red& White 236 Flanged ends 2 1/2"(64mm) andlarger. -Crane 373, Jenkins 587, Lunkenheimer1790C, Red & White 435A.

    2.16 Miscellaneous .1 All miscellaneous metal related to theMetal Related to plumbing systems, all metal back up plates andPlumbing Systems supports for all ceiling or wall supported

    equipment or plumbing fixtures is part of thissection of the work.

    .2 Unless otherwise shown on drawings steel

    items shall be as follows: Frames:-angle iron with 5/16" (8mm) locating stripwelded to it. -welded-on anchoring lugs at amin. of 3'-0" (/m) centresCoverplates: -5/16" (8mm) checker plate insections not exceeding 10 sq. ft. (0.93m2) insize -lifting holes at the ends of eachsection -provide gasketting between frames andcoverplates for sanitary systems.

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    2.16 Miscellaneous .3 Note: Mechanical trades shall lay out allMetal Related to pipe trenches and sumps. Hand over two coverPlumbing Systems lifting keys to the City of winnipeg. Frames

    (Cont'd) which are not out of level or coverplateswhich are warped will be rejected. Prime coatafter fabrication with two (2) coats of redlead primer in this section of the work. SeeDivision 9 of specification for finishpainting requirements.

    2.17 High Pressure .1 Magikist HWH60-5-20-N-99-L-O-C high pressureWasher System washer boiler, 5.0 us gpm, 200 psi. HWG40

    natural gas fired heater sectin w/ 395 MBHinput, 3/4" gas supply connection (7" w.c. gaspressure), 10" flue outlet, electronicignition, ProSafe heater controls, modulatinggas valve. Hx series pressure pump, 7.5 Hp,208V, 3 phase motor.

    .2 Provide unit c/w side-by-side stand,

    Magikminder automatic liquid levelproportioner, CPTX control panel, two(20remote control boxes with timed shutdown(includes ELCREM-2P remote box w/ pushbuttonstart/stop and toggle soap/rinse selection).Pressure regulator assembly and quick connectcoupling at proportioner.

    .3 Track and roller system: As provided by

    Pressure washer supplier, to be wall mountedalong each side of the Washbay (50' lengtheach side). Each track system to be c/w 3-8'flexible hose loops per 10' track section(total of 120' per side).

    .4 High pressure/high pressure hose from boilers

    discharge to hose rack loops, two highpressure trigger, gun and extension at groundlevel w/ wall hooks.

    .5 Water softener: Waterrite/Filtersoft A40-460

    commerical water softener, w/ WR11060 by-passvalve, 40,000 grain, electronic demandcontroller.

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    2.18 Grease Transfer .1 Samson model 624 transfer pumps c/w model 984System filter/regulator/lubricator with integral

    pressure gauge, model 418026 drum cover, 90degree switch spring rewind hose reel c/w wallmounting plate and 100' hose length model 1115grease nozzle w/ Z-swivel, compressed airquick connect.

    PART 3 - EXECUTION

    3.1 General .1 Copper pipe shall not be buried except wherespecifically noted on drawings.

    .2 All pipe shall be cut accurately to

    measurements taken at site. All changes indirection made with fittings.

    .3 All connections to equipment made with unions

    or flanges.

    .4 Remove valve working parts duringinstallation to prevent damage from heat wherebrazing, slodering, or welding is used.

    .5 Comply with CSA Standard W117.2 "Code for

    Safety in Welding and Cutting".

    .6 Drain pipes dropping into slab on grade shallhave sisson joint arranged to take up movementof slab.

    .7 Run all piping in accessible pipe spaces in

    such a way that it does not interfere withfree access into pipe space.

    .8 Co-operate with all contractor to properly

    locate all equipment connections.

    .9 Provide a shutoff valve on supplyconnections, at each piece of equipment, alongw/ backflow prevention device (at watersoftener/pressure washer connection).

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    3.2 Tests and .1 Furnish all labour, materials, instruments,Inspections etc. necessary for all required tests. All

    work shall be subject to inspection by localplumbing inspector and design authority. Atleast forty-eight (48) hours notice shall begiven in advance of making the required tests.

    .2 Tests on plumbing systems shall consist of

    pressure tests. All leaks shall be correctedby remaking the joints. The systems shall beretested until no leaks are observed. Testsshall be as follows: Sanitary waste system-hydraulic 10 ft. for 8 hours.

    .3 All plumbing fixtures shall be tested for

    soundness, stability of support and correctoperation.

    .4 No plumbing system or part thereof shall be

    covered until it has been inspected andapproved. If any plumbing system or partthereof is covered before being inspected orapproved, it shall be uncovered upon thedirection of the Plumbing Inspector or DesignAuthority.

    3.3 Piping .1 All piping systems, including all take-offsExpansion shall be so installed within the building that

    the piping and connected equipment will in noway be distorted by expansion, contraction orsettling.

    .2 If circumstances on the job require

    additional changes in direction from thoseshown on the drawings, the configuration shallbe adjusted to suit at no extra cost.

    .3 Anchors shall be installed where necessary tocontrol expansion. Expansion joints or loopsshall be installed on hot water and gasdistribution piping where required.

    3.4 Shop Drawings .1 Submit shop drawings for the following items:-Pressure washer equipment -water sofener -Grease transfer system -domestic water systemcontrols, valves -fixture brochures -floordrains -water hammer arrestors -equipment

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    3.4 Shop Drawings .2 See Mechanical General Section of work for(Cont'd) general requirements.

    3.5 Operating .1 See Mechanical General Section of work for& Maintenance general requirements.Manuals

    .2 Include in the manual the following itemsrelated to this section of the work:-comprehen sive description of the operationof the system, including the function of eachitem of equipment within the system. -detailedinstructions for the normal maintenance of allsystems and equipment installed includingprocedures and frequency of operational checksand service and trouble shooting instructions.-local source of supply for each item ofequipment. -lubrication schedule, indicatingthe recommended lubricants and grades (greaseor oil) for all lubricated equipmentcomponents. -labelling and identificationschedules. -valve schedule, includinglocation, service and normal position for alldomestic systems. -warranties, certificatesand miscellaneous reports. -manufacturer'soperating and maintenance brochures, includingwiring diagrams, pump curves with theoperating point indicated and controlmaintenance bulletins.

    3.6 Special .1 Sleeving of piping may be necessary throughRequirements parts of the concrete structure. All sleeveRegarding Sleeving locations are the responsibility of this theThrough Cast-In section of the work and shall be approved byPlace Concrete contract administrator prior to concrete

    pouring.

    END

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    PART 1 - GENERAL

    1.1 Requirements of .1 Tanks shall bear approval of ManitobaRegulatory Agencies Department of Labour, and when applicable,

    shall bear label of Underwriters' Laboratoriesof Canada.

    1.2 Shop Drawings .1 Submit shop drawings in accordance withSection 15010.

    .2 Shop drawings are required for:

    .1 Equipment.

    .2 Gas flex connectors.

    .3 Equipment supports, saddles and bases.

    1.3 Maintenance .1 Provide maintenance data for incorporationData into maintenance manual.

    1.4 HVAC Equipment .1 In the case of discrepancy betweenand Systems architectural and mechanical drawings as toComponents number, type or location of heating equipment

    and systems components, obtain written rulingduring tender call.

    .2 Subsequent to close of tender, if a

    discrepancy is noted between architectural andmechanical drawings as to number, type orlocation of heating equipment and systemscomponents, then the greater number shall befurnished with the type and location asdetermined by the Contract administrator at noadditional charge or expense to the City ofwinnipeg.

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    PART 2 - PRODUCTS

    2.1 Gas Fired .1 IR-1/2: Two Schwank STS-P155-40-WP gas firedRadiant Heaters radiant heaters c/w glycol, potted iginition,

    stainless steel housing, 900mm Type-2 doublewall gas/propane flex connections, full lengthstainless shield reflectors, sealed combustionkits.

    PART 3 - EXECUTION

    3.1 Piping .1 Examine areas where work is to be performedInstallation for:

    .1 Anything that affects execution andquality of work..2 Equipment clearances..3 Equipment access requirements.

    3.2 Equipment .1 Examine areas where work is to be performedInstallation for:

    .1 Anything that affects execution andquality of work..2 Clearances for equipment access(maintenance, inspection and removal).

    .2 Install all equipment in accordance with

    manufacturer's recommendations.

    .3 Make tests to demonstrate capabilities andgeneral operating characteristics of allequipment, as instructed by the Contractadministrator.

    3.3 Gas Fired .1 Coordinate with appropriate contractors toRadiant Heaters modify/extend existing gas service to new

    radiant heater flex connection, installationof chimney venting/intake duct, existing DDCcontrols modifications.

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    3.4 Clean-up .1 Maintain all work areas in clean condition.

    .2 Leave all systems operating with work areasclean to the satisfaction of the Contractadministrator.

    .3 Remove all paper, marks and nametags (do not

    remove nameplates). Protect all equipmentduring construction. Cover equipment asrequired by the Contract administrator at anyand all times for protection.

    END

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    City of Winnipeg Air Distribution Section 15800 Tender No. 15-2003 Page 1

    PART 1 - GENERAL1.1 Related WorkSpecified Elsewhere .1 Mechanical General Provision Section 15010

    .2 Insulation: Section 15180

    .3 Plumbing Section 15400

    .4 Heating Section 15700

    .5 Controls Section 15900

    .6 Balancing and Testing Section 15990

    1.2 Description of .1 Provide complete supply, exhaust, and outsideSystems air systems including but not limited to, the

    following:.1 Ductwork and appurtenances such asbalancing dampers, etc..2 Chimney power venter..3 Chimney stack.

    .2 At end of work, leave complete, tested and

    operating system to Contract administrator'ssatisfaction.

    .3 Combustion air/vent air duct down from roof

    hoods c/w birdscreen.

    .4 Existing abanoned chimney openings notscheduled for reuse shall be sealed watertight above and below roof, and insulated.

    1.3 Reference .1 Conform with the requirements of the plansStandards and specifications, the local authorities

    having jurisdiction and the Local BuildingCodes. In the case of conflictingrequirements, be governed by the most severeregulations.

    .2 Use latest edition of all referenced codes,

    standards, regulations, etc.

    .3 Conform to ASHRAE and SMACNA Standards.

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    1.4 Requirements of .1 Electrical equipment shall bear CSA and ULCRegulatory Agencies labels attesting to having met test standards

    of agencies and having been listed.

    .2 Fire dampers shall bear ULC label and shallbe approved for use by the I.A.O.

    .3 Acoustical linings shall be approved for use

    by the I.A.O.

    1.5 Samples .1 Submit all samples requested by theContract administrator.

    1.6 Shop Drawings .1 Submit shop drawings in accordance withSection 15010.

    .2 In addition to items noted in Section 15010,

    clearly indicate:.1 Air distribution devices and equipmentdimensions..2 Pressure drop-offs through filters.3 Sound level ratings..4 Scales and operating ranges fortemperature and pressure indicators..5 Leakage and flow characteristic data forall control dampers.

    1.7 Maintenance .1 Provide maintenance data for incorporationData into maintenance manual.

    1.8 Fixtures .1 In case of discrepancy between architecturaland Fittings and mechanical drawings as to number, type or

    location of air distribution devices obtainwritten ruling during tender call.

    .2 Subsequent to close of tender, if a

    discrepancy is noted between architectural andmechanical drawings as to number, type orlocation of air distribution devices then thegreater number shall be furnished, with thetype and location as determined by theContract administrator and at no additionalcharge or expense to the City of winnipeg.

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    1.9 Co-ordination .1 Section 15800 shall supply and install allmotorized dampers in their respectivelocations in the ductwork.

    .2 All control wiring, including interlock

    wiring required, except where otherwise noted,shall be supplied and installed by the ControlSupplier.

    .3 All temperature control wiring 50 volts or

    more shall be a minimum of #14 gauge wire. Alltemperature control wiring less than 50 voltsshall be minimum #18 gauge wire. All wiringshall be run in conduit, including low voltagecontrol wiring.

    .4 All temperature control wiring shall conform

    with the requirements of the local electricalauthority and the specifications Division 16-Electrical.

    .5 Division 16 - Electrical shall provide the

    following: - All power wiring to equipment.

    .6 Coordinate with Section 15990.

    PART 2 - PRODUCTS

    2.1 Low Pressure .1 Provide all low pressure ductwork includingDuctwork all appurtenances, hangers, dampers, turning

    vanes, etc.

    .2 Provide galvanized sheet metal ductwork:.1 Use prime material free ofimperfections, which is guaranteed to bend andflatten without fracture..2 Use the following galvanized sheet metalthicknesses:

    Duct up to 300 mm (12") on longest dimension -0.55 mm. (26 ga.)Ducts 325 mm (13") to 750 mm (28") on longestdimension - 0.70 mm. (24 ga.).3 Use Pittsburgh lock or double slide lockhammered flat for longitudinal joints onstraight ductwork..4 Use Pittsburgh lock for corner lock offittings.

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    2.1 Low Pressure .2 (Cont'd)Ductwork .5 Use flat drive cleat joint on all side

    (Cont'd) joints 450 mm (18") and under in length..6 Use flat slip cleat joint on alltransverse joints 450 mm (18") and under inlength..7 Use angle "S" or standing drive cleatson all side joints 475 mm (19") to 750 mm(30") in height:

    .1 Use cleat having standing dimensionof not less than 25 mm (1")..2 Space cleats no more than 1 M (36")on centre..3 Bolt cleats through side sheets atnot more than 350 mm on centre.

    .8 Round and oval ductwork shall be spiralconduit constructed of zinc coated steel:Acceptable products: United Sheet Metal Co.Shop fabricated ductwork and fittingsconstructed in a manner similar to the factorytype specified will be accepted as equalsubject to the approval of the Contractadministrator of satisfactory shop drawingsand samples prior to fabrication.

    Conduit Size Gauge of Metal

    8" and smaller 269" to 22" 24.9 All seams and joints in round or ovalduct fittings and elbows shall be continuouslywelded. If the zinc coating is burned off thesteel during welding, the joints shall bepainted to prevent corrosion. Duringfabrication care shall be taken to eliminateprojection of metal edges into the air stream.Sheet metal thickness of fittings and elbowsshall be suitable for welding method used withminimum thickness as the connecting ductwork..10 Round elbows shall have a minimumcentreline radius equal the duct diameter.Construct 90 deg. elbows from a minimum of 5cores.

    .3 Dampers:

    .1 Fabricate from galvanized steel 2 gaugesheavier than ductwork into which it isinstalled..2 Attach damper to pivot rod provided withlocking quadrant and indicating device..3 Round (and rectangular ducts up to 300mm(12") deep) single blade butterfly type.

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    2.1 Low Pressure .3 Dampers:(Cont'd)Ductwork .3 (Cont'd)

    (Cont'd) Rectangular ducts over 300mm (12") deep usemultiple blade

    .4 Seal all joints airtight. Standard of

    Acceptance for sealant: Flexmaster Duct BondII non-toxic, paintable, High Pressure DuctSealer or equal as manufactured by Duro-Dyne,3M or Flintkote.

    2.2 Chimney Power .1 Power venter as manufactured by TJERNLUNDVenter HSUL-2. Suitable for 395 mbhi appliance, c/w

    interlock for pressure washer boiler, airproving switch (pressure diaphrapm switch),vibration isolation. Unit to be interlocked.Unit to be interlocked w/ appliance operation.

    .2 Install to manufacturer's recommendations.

    2.3 Breechings .1 Shop fa