Addendum No. 2 Date: August 29, 2011 Project: HVAC Upgrade for MDOT Construction and Technology Bituminous Laboratory Dimondale, Michigan File No. 071/10503.JNS Index No. 44210 Owner: State of Michigan Department of Technology, Management and Budget Facilities Administration Engineer: Byce & Associates, Inc. P.O. Box 50866 487 Portage Street Kalamazoo, Michigan 49005-0866 (616) 381-6170 Project No. 10100181 Bid Date: August 31, 2011 _______________________________________________ The Contract Documents shall be amended and/or revised by Addendum hereinafter specified and all Work affected by Addendum shall be included. Except as may be otherwise described, labor and material for the Work hereinafter specified shall conform to all requirements of the Original Contract Documents.

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Addendum No. 2 HVAC Upgrade for MDOT Construction and Technology Bituminous Laboratory Dimondale, Michigan ARCHTECTURAL SYSTEMS S1 Section 087100-Door Hardware

A. REVISE 087100.1.12 Door hardware Set #1 Change Door Hardware Set to accommodate a single door rather that a pair. Change 8 hinges to 3 for standard hollow metal single leaf door and frame. Change Wall Bumpers from two to one.

SI Section 099000-Painting and Coating

A. See Section 099000 Part 1 General, Summary 1.1 Sections C Clarification, all interior and exterior exposed surfaces including ductwork, hangers, supports and fasteners shall be prepared to receive and shall receive prime coats and finish paint coatings to match adjacent existing systems

MECHANICAL SYSTEMS M1 Section 230593-Testing, Adjusting, and Balancing for HVAC A. REVISE 1.6.B QUALIFICATIONS to include: 6. Pro-MEC Engineering Services, Inc. M2 Section 230923 – Direct Digital Controls

A. Add 2.5 S. Room Pressure Monitors

1. The room pressure controller (Controllers) shall be capable of measuring the differential pressure between two individual spaces at all locations shown on the prints. Each room shall have its own controller capable of stand-alone operation. Each monitor is capable of both visual and audible alarms. Each monitor will use direct pressure measurement utilizing industrial quality differential pressure transducer technology.

a) Implied pressure measurement systems utilizing thermal (hot wire or thermal mass) air velocity measurement are not acceptable)

2. Each monitor shall have an easy to navigate microprocessor based controller with full color TFT touch screen interface. Touch screen shall be capable of displaying room conditions in full color i.e. Red screen for alarm. All settings and programming shall be made via simple touch screen. The processor can be custom programmed to allow the end user custom images, messages and icons. The monitor shall have a color TFT / VGA touch display with 240 X 160 resolution, 256 color, and sunlight viewable. 3. Display shall be fully programmable with custom graphics and fonts. Monitor will store all settings in non volatile memory. Monitor to be capable to incorporate custom JPEG’s or BMP’s for

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display. Monitor will continually display room differential pressure. Monitor settings shall be accessed via programmable and password protected touch screen. Monitor shall be capable of custom color, graphics and messages per the owner. Monitor shall be recess mounted. Supply voltage shall be 24 volt ac/dc. 4. Monitors using single or multiple line LCD alphanumeric character displays and or LED indicators are not acceptable. Touch pads and layered programming menus are not acceptable. 5. The sensor shall continuously monitor and or control bi-directional room pressurization using direct pressure sensing referenced to the adjacent space. Wall / ceiling mounted assembly fittings and stainless steel cover plate for the isolation room shall be provided with the controller as a complete unit

Q. Mounting

1. CRC-RM Room pressure monitor shall be mounted in the corridor adjacent to the isolation room entrance. Monitor shall be in clear view for staff in corridor.

R. Control and Monitor

1. The CRC-RM Controller shall have closed loop control and or monitor of the associated room condition to maintain a safe and comfortable negative/neutral or positive/neutral pressure relative to the adjacent spaces.

S Products

1. CRC-RM Critical Room Control Room Monitor a.The Critical Room Control Room Monitor (CRC-RM ) room pressure monitor/controller shall be capable of measuring the differential pressure between two individual spaces. Each monitor is capable of both visual and audible alarms. Each monitor will use direct pressure measurement utilizing industrial quality differential pressure transducer technology.

1) Implied pressure measurement systems utilizing thermal (hot wire or thermal mass) air velocity measurement are not acceptable)

2. Each monitor shall have an easy to navigate microprocessor based controller with full color TFT touch screen interface. Touch screen shall be capable of displaying room conditions in full color i.e. Red screen for alarm. All settings and programming shall be made via simple touch screen. The processor can be custom programmed to allow the end user custom images, messages and icons. The monitor shall have a color TFT / VGA touch display with 240 X 160 resolution, 256 color, and sunlight viewable.

3. Display shall be fully programmable with custom graphics and fonts. Monitor will store all settings in non volatile memory. Monitor to be capable to incorporate custom JPEG’s or BMP’s for display. Monitor will continually

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display room differential pressure. Monitor settings shall be accessed via programmable and password protected touch screen. Monitor shall be capable of custom color, graphics and messages per the owner. Monitor shall be recess mounted. Supply voltage shall be 24 volt ac/dc.

4. Monitors using single or multiple line LCD alphanumeric character displays and or LED indicators are not acceptable. Touch pads and layered programming menus are not acceptable.

M3 Section 230993 - Sequence of Operations for HVAC Controls

a. Change 3.4.C – Outside Air Damper: when supply fan is running, open outside air damper is 100% open. When supply fan is not running, close outside air damper.

b. Add 3.11 – Laboratory Exhaust Differential Pressure Control A. The control package shall be capable of maintaining the

laboratory room exhaust system at a predetermined differential pressure level regardless of laboratory activity (i.e. opening/closing of exhaust air valves). This shall be accomplished without any user input.

B. The outlet velocity of each fan in the exhaust system shall be maintained at a minimum of 3000 fpm at all times.

C. The differential pressure at which the system is required to be maintained shall be capable of being offset manually at the control package interface. The control package shall also be capable of receiving an airflow measurement from the exhaust system and AHU-7 to maintain a differential set point from the building control system.

D. Fans running simultaneously shall run at the same speed. E. The control package shall stage the fans in the system so that no

one fan is idle for more than 30 days. F. The control package shall respond to a failure of one fan by

energizing an unused fan (if present) to replace it. G. If required, a communication card shall be included which will

allow information to be sent from the control package to the building control system. This information shall include the measured system static pressure, the frequency at which the VFDs are running, fault status, and any other parameters required on the job.

H. Wiring shall be done in the factory so as to minimize field wiring. Control wiring shall be brought to a single point in both the rooftop exhaust unit and VFD/mechanical room equipment.

I. The controller shall be powered separately from any other component in the system.

M4 Section 232113-Hydronic Piping A. REVISE 2.1 Glycol Piping Above Ground to include rolled groove mechanical piping system conforming to ASTM F-1476.

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M5 Section 232216 – Steam and Condensate Piping Specialties A. REVISE 1.3.2 a. Pressure Differentials: Medium Pressure Steam: 15 psi

maximum. B. ADD Manufactures.

a. Flexible Connectors i. Flexonics ii. Metraflex iii. Flex Hose

b. Pressure Gages i. Weksler ii. Trerice iii. Miljoco

c. Pressure Gage Taps i. Weksler ii. Trerice iii. Miljoco

d. Strainers i. Armstong ii. Spirax Sarco iii. Watts

e. Traps i. Armstong ii. Spirax Sarco iii. Hoffman

M6 Section 233600 – Air Terminal Units A. REVISE 2.1.D.1. Valve Body: 316l Stainless Steel. B. REVISE 2.1.D.2. Coating: None. M7 Section 237300- Indoor Central-Station Air Handling Units A. ADD 2.9 DAMPERS. a. Mixing Boxes: Section with factory mounted outside air dampers of

galvanized steel and vinyl edge seals in galvanized frame, with galvanized steel axles in self-lubricating brass bearings, opposed blade arraignment with damper blades positioned across short air opening dimension.

B. ADD 2.10 OUTSIDE AIR MEASURING AND MODULATION DEVICE a. Mounted in outside air stream opening. b. Damper and airflow measurement assembly sized to accommodate

minimum outside airflow. c. Construction: 1. Frame: Extruded aluminum. 2. Blades: Modulating Air Control a. Style: Airfoil-shaped, single piece b. Action: Opposed. c. Orientation: Horizontal. d. Material: Heavy gage 6063-T5 extruded aluminum. e. Width: Maximum 5-1/4” inches. f. Finish: Anodized.

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M8 Section 238413 – Humidity Control Equipment

A. REVISE 2.1 a. Product Description “Humidifier to be a direct steam multiple tube

panel type, based on Dri-Steem Ultra-Sorb model LH. Humidifier panel shall consist of type 304 stainless steel supply and condensate headers and multiple dispersion tubes, factory assembled in a galvanized steel casing. Non-jacketed dispersion tubes to dispense steam in such a manner to provide two layers of steam from each tube. Tubes shall be factory insulated with plenum rated PVDF closed cell insulation, in a configuration that will not affect steam absorption performance. Dispersion tubes shall incorporate tubelets to take “dry” steam from the center of the tube. Tubelet orifice size shall be calibrated for the load to provide even steam distribution. Humidifier shall be engineered to provide steam absorption within 13” downstream at 55F discharge air temperature. Humidifier shall be provided with a bronze body steam valve with stainless steel trim, and electric modulating actuator suitable for a 0-10vdc or 4-20mA control signal by others. Humidifier shall be provided with two steam traps and a Y strainer.

M9 DRAWING M-1 – SCHEDULES, DETAILS, NOTES, AND ABBREV. This sheet is NOT reissued.

1. REVISE AHU Cooling Coil Detail to include isolation valves at each coil supply and return connections.

2. REVISE Heat Recovery Piping Schematic to include isolation valves at each individual Exhaust heat recovery coil supply and return connections.

3. REVISE Heat Recovery Piping Schematic domestic cold water make-up pipe size from 1” to ½”.

4. REVISE AHU-7 Heating Recovery Coil entering water temperature (E.W.T.) schedule to 40 deg. F.

M10 DRAWING M-6 – MECHANICAL SECTIONS AND DETAILS This sheet is NOT reissued. Refer to attached sketch MSK-1. 1. REVISE Control Diagram Detail to include 2-position selector switch on each canopy, fume, and capture hood to allow user to change from Min. to Max. exhaust airflow valve position. M11 DRAWING M-7 – FIRST FLOOR FIRE PROTECTION PLAN This sheet is NOT reissued. Refer to attached sketch MSK-2. 1. REVISE existing, and provide new fire suppression sprinkler heads below new 60” wide exhaust ductwork to conform to N.F.P.A.-13. M12 GENERAL NOTE Coordinate all crane and lifting activities during Bit Lab un-occupied hours with the State of Michigan.

Bidding and Contract Document Project Name: MDOT Bit Lab HVAC Upgrade File No. 071/10503.JNS

BID SCHEDULE

Base Bid Schedule - The Bidder will complete the Work and accept as full payment, for the Work items listed, the following Unit Prices and/or Item Bid Prices, as applicable:

Base Bid Bid Description Unit Item Bid Item No. Quantity (Bidder to write price in words) Price Price

Allowance: Base Bid shall include a $50,000 construction allowance.

Base Bid (Sum of Item Bid Prices for all Base Bid Items and allowance):

________________________________________________________________ Dollars and No/Cents $__________________________ (use words) (in figures)

Name of the Bidder _________________________________________ Agency No. 071___ Index No. 44210___ File No. 071/10503.JNS

Date _________________________

Federal Identification (I.D.) No. or Social Security No. _________________________________

Telephone No. _______________________

Schedule of Alternates - The Bidder will complete (or deduct from the Contract) the parts of the Work designated by the Alternates that follow and accept in full payment (or allow in full credit) for those parts of the Work the following Item Bid Prices:

Alternate Bid Description Unit Item Bid Item No. Quantity (Bidder to write price in words) Price Price

The Bidder further acknowledges and agrees that the separate prices bid on this “Schedule of Alternates,” where they are applicable and deemed acceptable by the Owner, will be used if incorporated into the Contract when the Owner issues the Notice of Award.

Name of the Bidder _________________________________________ Agency No. 071___ Index No. 44210_ File No. 071/10503.JNS

Date ________________