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16950-2
TESTING ELECTRICAL SYSTEMS AND START-UP

3. Check for tools inside equipment or enclosures. All screw, bolt, and terminal
connections shall be checked for tightness as specified by the equipment
manufacturer.

4. Check the bearings of all rotating electrical apparatus and, if required, have
supplier fill with the grease or oil as recommended by the manufacturers.

5. All motors, contacts, relays, bus, insulators and other electrical apparatus shall
be cleaned and dried out if required and/or needed. Drying out methods will be
such that the insulation temperature of the apparatus does not exceed 90°C.

Prior to applying voltage to any apparatus or circuit, make insulation resistance tests

and, if necessary, dry the apparatus until resistance values conform to the standards

of IEEE.

In case of a low resistance circuit insulation, eliminate the problem before the circuit

is energized.

Provide 1000 volt "Megger" insulation testing on all 600 volt feeder conductors and

motor power conductors. This shall include any and all of the existing electrical

feeder cables at the facility which shall remain and shall be reconnected. Motors
shall be meggered from the starters.

Provide 2500 volt "Megger" insulation testing for all heat trace cabling to be

installed at all locations as shown on the Drawings.

"Megger" test all required service feeder cables and circuit wiring at the existing

facility in their entirety and submit a complete test report. Test voltage shall be

applied until readings reach a constant value, and until three (3) equal readings, each
one (1) minute apart, are obtained. Minimum megger reading shall be 45 megohms
for feeder conductors.

Three phase panelboard’s line currents shall be balance to within 10% of each other.

Three phase motors shall be checked for rotation and, if necessary, reverse the

connections at the starter. Single phase and DC motors at motor connection box.

All main plant building loops and major equipment grounds shall be tested to remote

earth or directly referenced to an extremely low resistance (approximately 1 ohm)

reference ground bench mark. Tests shall be made with ground testing ohm meter
or "megger" approved by the Engineer for the purpose.

The Contractor shall provide load readings for all equipment, switchgear, motor

control centers and panelboards.

Panelboard line currents shall be balanced within 10%.

Test and set all motor circuit protectors, motor overload heaters to the nameplate

horsepower of the equipment; and all circuit breaker settings in all electrical

equipment shall be tested and verified operational.

Adjust all settings on protective equipment and verify, check and establish with the

power company that the secondary voltage is within 2% of rated voltage.

Provide and check all overload relays settings and sizing for all motors and submit

this data to the Engineer for final approval. This shall include settings and

adjustments to MCP devices for each motor starter.

DEMONSTRATION AND START UP

A.
B.

All equipment shall be properly identified as indicated in SECTION 16010.
When directed by the Engineer, demonstrate the total system operation and make
final adjustments to the system. If any system or piece of equipment within a system

13089K

16950-3
TESTING ELECTRICAL SYSTEMS AND START-UP

fails to function properly, rectify such defects or inadequacies and make a final
demonstration as directed by the Engineer.

Provide the services of authorized manufacturers' representatives to instruct the
Owner's representatives in the proper operation of each partial or complete system
installed under this Contract.

Pay all charges or fees, including the cost of any special test equipment, factory
engineers, etc. necessary for the proper performance of the specified tests,
demonstrations, and instructions.

All demonstrations and instructions shall be scheduled at the convenience of the
Engineer and the Owner and shall be scheduled with at least seventy-two (72) hours
written notice.

All control circuits shall be functionally checked to see that their operation and
sequence are correct. Any adjustable switches such as float switches, limit switches
and timers shall be adjusted for proper operation.

Just prior to acceptance of the lighting facilities, clean all lighting fixtures and
relamp where required at no additional cost to the Owner.

13089K

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13089K

ADDENDUM NO. 2
TO
NASHUA, NEW HAMPSHIRE
WASTEWATER TREATMENT FACILITY — HVAC UPGRADES

IFB0292-041017

APRIL 2017

PREPARED BY:
Wright-Pierce
230 Commerce Way, Suite 302
Portsmouth, NH 03801

Addendum No.2
Page | of 2

April 4, 2017

ADDENDUM NO. 2
NASHUA, NEW HAMPSHIRE
WASTEWATER TREATMENT FACILITY —- HVAC UPGRADES

As a point of clarification, it should be understood that the Contract Documents govern all aspects of the
project. Informal discussions held over the telephone and/or during the pre-bid meeting are informational only.
All official changes to the Contract Documents are made only by addenda. The following changes and
additional information are hereby made a part of the Contract Documents. All Bidders shall acknowledge
receipt and acceptance of this Addendum when submitting their Bids. Bids submitted without
acknowledgement of receipt of this addendum may be considered non-responsive.

DRAWINGS

1. Drawing M-6: ADD the following under Notes: “4. Dampers SP1 and SP2 shall be 8” x 8”, parallel blade
control dampers, Greenheck VCD-23 or equivalent. Provide with NEMA 7 control actuators.”

2. Drawing E-1: ADD the following to the NEMA CLASSIFICATIONS FOR NEW ELECTRICAL

EQUIPMENT AND ENCLOSURES table “ROOM NAME: SLUDGE PROCESSING GARAGE, NEMA
RATING: 7”.

SIGNIFICANT QUESTIONS AND RESPONSES DURING THE BIDDING PERIOD

1. Q: Please provide additional schedule information for dampers SP] and SP2 on drawing M-6 and
where they will be powered from.
R: See drawings No. 1 above for schedule information. See drawings No. 2 above for the
classification of the Sludge Processing Garage, which will dictate the type of conduit needed.
Dampers SP1 and SP2 will be powered from ATC-1 as shown on drawing E-9.

13089K Addendum No. 2?
Page 2 of 2

TABLE OF CONTENTS
INFORMATION FOR BIDDERS

Page
Article 1 - Defined Terms 200.000.0000 ccccccccec cece cccecceeee eens cesecaeeescesecseecseeseeaecaeeeseeseeseeesseseeeessseteeteeseeeeenaeens 2
Article 2 - Copies of Bidding Documents ....0...0.0.000cccccccccccc cece een ee cee ce cece este enieteiseeiseenstenetensteeieens 2
Article 3 - Qualifications of Bidders. ....0..0..000cccccccccccc ce cccccccee cece seceneseceseeeeesesessesssesceseteessesesstssnsssseneeeesies 2
Article 4 - Examination of Bidding Documents, Other Related Data, and Site. 0.000000 ccc eee 2
Article 5 - Pre-bid Conference 0.0.0.0 cceccccccccccecceceenecceeecesecaceesceseesaeeacesecaeeaeeesesseeseeeseesseeesseeteetaeeneeeeeeaeens 5
Article 6 - Site and Other Areas 0.0... cece cece ceceescesecs ces ceeseeseeseeceeesscaecaeeeseeseeseeeseeseeeesseeteeteeneeeeeeaeens 5
Article 7 - Interpretations and Addenda .0.0...0...0.cccccccccccc ccc cece cees ects cee cbe cies eecteseieeeisesiseesstentenieenieens 5
Article 8 - Bid Security 20.0000 cccc cece cece cen cree ene e reer E enero bide c de cde CHES dE SESE fte eet enetetiteneteniteeiieens 5
Article 9 - Contract Times ........0. cece ccceccccccnceesceecsceescesecseeescesecsaecaceseesseaeeaeeeseeseeseeeseeseessesseeteeteensenseeaeens 5
Article 10 - Liquidated Damages .......0..0..0cccccccccc cece cite cece cence centres cent ened cba ee casei ae cit eneenisteiseeistenstenieeieens 6
Article 11 - Substitute and "Or-Equal" Items ...0..000.00 ccc ccccccccccccec cee ce ese cee cee cee ete ciesciesnneesisenireesesiieen 6
Article 12 - Subcontractors, Suppliers and Others 00.00.0000. ccccccccece eee ces ecnee cee cee cceccnessteeeiseniseesseenieees 6
Article 13 - Preparation of Bid ........0cccccccccc ccc cece c nee ne eee e nent ene t ened ened tbe de cae cae cae ciiescesiiesiiieniieniieenitess 6
Article 14 - Basis of Bid; Evaluation of Bids oi... ccccccccccccccesecnssccceccevcessentsaesccsessussennsaseceseesesttntaaeeess 7
Article 15 - Submittal of Bid ooo... cece cece cece cc ceecceececeeeceaecaeeeseesecseeessesecsaesseesecaecaseesensecseeeseeseeseeeseeseenes 7
Article 16 - Modification and Withdrawal of Bid oo.......cc ccc ccc eee ceeeeceeceececesecaecasensenseceeeseeseeeeeseeseenes 8
Article 17 - Opening of Bids....0...0 cocci cc cece cece ec ne ene ene e rte eed eens fone tebe d tei ae cide cae ciesiieeiiesiiitesieniieees 8
Article 18 - Bids to Remain Subject to Acceptance ......0.cc ccc ccc cect cece cece eens tenseceecneccesinessneeeiseniseniieees 8
Article 19 - Award of Contract ....0..00ccccccccecccccccceeceeceeceecnaecaceeseeseesseseeeseesecsaesseesecaecaseesensecseesseeseeseeeeseseenes 8
Article 20 - Contract S@CUrity 0.0.00 ccccc cece ccc cece cece cee cece bre nnd e ene fone tebe ttbi decree cae siesiesiieseiieeiieniieess 9
Article 21 - Signing of Agreement... cc cece eee ene e cece cine cote bts eeteteeeseeiaeciaecaeciiesiesineseisteisensieees 9
Article 22 - Retainage oo... ccc ccc cece een eee eee c ec nE LEE EDL E DLE Ee nate be deer dd cnet tae cdesiietietetiteniennieees 9
Article 23 — Appeal by Bidders 0.0.0.0 0ccccccccc ccc ccc cee cece etre bere e tees cece cece ecne ene tniresisesistenetenieeieens 9

IB- 1 of 10

INFORMATION FOR BIDDERS

ARTICLE 1 DEFINED TERMS

1.01 Terms used in these Instructions to Bidders will have the meanings indicated in the General
Conditions and Supplementary Conditions. Additional terms used in these Instructions to
Bidders have the meanings indicated below which are applicable to both the singular and plural
thereof:

A. Bidder — The individual or entity who submits a Bid directly to OWNER.

B. Issuing Office — The office from which the Bidding Documents are to be issued and
where the bidding procedures are to be administered.

C. Successful Bidder — The lowest responsible Bidder submitting a responsive Bid to whom
OWNER (on the basis of OWNER’s evaluation as hereinafter provided) makes an
award.

ARTICLE 2 COPIES OF BIDDING DOCUMENTS

2.01 Bidding Documents are available electronically City’s web site, www.nashuanh.gov, under
Services; Bid Opportunities; Current Bids. Hard copies are not available.

2.02 Complete sets of Bidding Documents must be used in preparing Bids; neither OWNER nor
ENGINEER assume any responsibility for errors or misinterpretations resulting from the use of

incomplete sets of Bidding Documents.

ARTICLE 3 QUALIFICATIONS OF BIDDERS.

3.01 To demonstrate Bidder’s qualifications to perform the Work, each Bidder must submit a
completed Construction Contractor’s Qualification for Engineered Projects.

ARTICLE 4 EXAMINATION OF BIDDING DOCUMENTS, OTHER RELATED DATA, AND SITE.
401 Subsurface and Physical Conditions

A. The Supplementary Conditions identify:

1. Those reports of explorations and tests of subsurface conditions at or contiguous to
the Site that ENGINEER has used in preparing the Bidding Documents.

2. Those drawings of physical conditions in or relating to existing surface and
subsurface structures at or contiguous to the Site (except Underground Facilities) that
ENGINEER has used in preparing the Bidding Documents.

B. Copies of reports and drawings referenced in paragraph 4.01.A will be made available by
OWNER on City of Nashua’s website only. Those reports and drawings are not part of
the Contract Documents, but the “technical data” contained therein upon which Bidder is
entitled to rely as provided in paragraph 4.02 of the General Conditions has been
identified. Bidder is responsible for any interpretation or conclusion Bidder draws from
and “technical data” or any other data, interpretations, opinions or information contained
in such reports or shown or indicated in such drawings.

IB - 2 of 10