KPE - standardsharev3.com 1_pdfA.pdf Omaha Des Moines ... APV Plate & Frame Heat Exchangers ... The...

1016 Leavenworth St

Omaha, NE 68102

402-291-1444

www.kpe-inc.com

Omaha ▪ Des Moines ▪ Bismarck KPE

ADDENDUM ONE

PROJECT: Exira-EHK Community School District Capital Improvement Projects KPE# 454-002

DATE OF ISSUE: February 7, 2018

BID DUE DATE: February 15, 2018 at 2:00pm NOTICE This addendum is issued by KPE to all known individuals, firms, or corporations who have obtained or received bidding documents and contract documents for the above listed project. This addendum shall become part of the contract documents as a revision to the original documents.

This addendum is issued to modify, supplement and/or clarify the original Bidding Documents and shall be considered supplemental thereto. Each Bidder shall indicate consideration of the Addendum by completion of the appropriate blank space on the Bid Form and shall be responsible for advising prospective suppliers and sub-contractors.

PLAN HOLDERS LIST can be obtained at Standard Digital Imaging, 4424 S. 108th Street, Omaha, NE 68137 - Phone (402) 592-1292 or at www.standardshare.com. PRE-BID MEETING AGENDA AND SIGN-IN LIST: See attachment. ACCEPTABLE MANUFACTURERS/PRODUCTS: In addition to the specified items, the following manufacturers are acceptable for bidding purposes only. This is not an approval of specific items. Proposed items must meet or exceed all aspects of the specified items. It shall be the manufacturer’s responsibility to provide equivalent products for the specified products. Review of suitability of substituted products shall be done through substitution requests. Additional engineering or design required for substituted products shall be at the contractor’s expense.

SECTION 084113 – Aluminum Framed Entrances and Storefronts

1. Tubelite

SECTION 116800 – Playground Equipment and Safety Surfacing

1. Playworld – Playground Equipment

a. Contact: Fry & Associates, Inc. – (800) 444-9787

2. Primo Prism Turf – Safety Surfacing

a. Contact: Fry & Associates, Inc. – (800) 444-9787

SECTION 230923 – Direct Digital Control System for HVAC

1. Schneider Electric

SECTION 232116 – Expansion Tank

1. Patterson Pump

EXIRA-EHK COMMUNITY SCHOOL DISTRICT Page 2 Capital Improvement Projects Addendum One


SECTION 232116 – Air & Dirt Separator

1. Thrush Co.

SECTION 232116 – Automatic Flow Control Valves & Piping Packages

1. Pro Hydronic Specialtie

SECTION 232123 – Hydronic Pumps

1. Patterson Pump

SECTION 235700 – Heat Exchangers for HVAC

1. APV Plate & Frame Heat Exchangers

SECTION 238223 – Unit Ventilators

1. Modine

SECTION 265119 – LED Interior Lighting

1. Metalux

SECTION 265619 – LED Exterior Lighting

1. Lumark

SHEET M602 – Exhaust Fan Schedule

1. Soler & Palau

SHEET M602 – Variable Frequency Controller

1. Danfoss

SHEET M602 – Louvers

1. United Enertech

BID PACKAGES A, B, C, D – Project Manual – Volume 1 CHANGES TO SPECIFICATIONS:

SECTION 011000 – Summary, Articles 1.6D.1b & 1.6D.1c

1. Revise 1.6D.1b to read ‘August 17, 2018’ in lieu of ‘August 8, 2018’.

2. Revise 1.6D.1c to read ‘August 31, 2018’ in lieu of ‘August 17, 2018’.

SECTION 012300 – Alternates, Articles 3.1A.1a & 3.1A.1b

1. Revise 3.1A.1a to read “Base Bid: All boiler room equipment and piping to be abandoned in place. All

steam/condensate piping and condensate pumps in tunnels to be abandoned in place.”

2. Revise 3.1A.1b to read “Alternate: All work associated with the removal and disposal of all equipment and

piping in the boiler room. All work associated with the removal and disposal of steam/condensate piping and

condensate pumps in tunnels.”

BID PACKAGE A – Miscellaneous Improvement Projects (Elk Horn and Exira) CHANGES TO SPECIFICATIONS:

SECTION 080671.02 – Door Hardware Sets

1. On Page 7 revise title ‘Hardware Sets – Elk Horn Exterior’ to read ‘Hardware Sets – Exira Exterior’



SECTION 084113 – Aluminum Framed Entrances and Storefronts, Articles 2.3A.3 & 2.4A.2

1. Revise 2.3A.3 to read: ‘Glazing Plane: Center.’

2. Revise 2.4A.2 to read: ‘Door Design: Medium stile; 3-1/2–inch nominal width.’

SECTION 237333.16 – Indoor, Indirect, Gas-Fired Heating and Ventilating Units

1. Add this section in its entirety.

CHANGES TO DRAWINGS:

SHEET NO. G001 – COVER SHEET

1. Revise Alternate No. 1: Removal of Boiler Room Equipment and Piping description to the following:

Base Bid: All boiler room equipment and piping to be abandoned in place. All steam/condensate piping and

condensate pumps in tunnels to be abandoned in place.

Alternate: All work associated with the removal and disposal of all equipment and piping in the boiler room.

All work associated with the removal and disposal of steam/condensate piping and condensate pumps in

tunnels.

SHEET NO. M301 – MECHANICAL PLAN – ELK HORN FIRST FLOOR

1. Add flag note 7 to HPE-12. Flag note shall read “HPE-12 shall have field fabricated plenum to accommodate

ceiling height. Line with 2” acoustic insulation. Connect ductwork to discharge plenum.”

SHEET NO. M302 – MECHANICAL PLAN – ELK HORN MEZZANINES

1. Revise flag note 14 to read “Provide 5” double wall type B vent up through roof. Install per manufacturer’s

recommendations.”

2. Add motorized damper to OA duct for each HV-1 & HV-2.

3. Revise flag note 6 to read “Mount GUH as high as possible. Provide 3/4” NG line to existing on mezzanine.”

SHEET NO. M501 – MECHANICAL DETAILS

1. Insert Sketch MSK-1.

SHEET NO. E101 – ELECTRICAL COMPOSITE PLAN – ELK HORN

1. Refer to sketch ESK1. Plan notes are changed to retain the existing transformer pad and to provide a tap

box for connection of existing to new secondary conductors.

SHEET NO. E201 – ONE LINE DIAGRAMS – ELK HORN

1. Refer to sketch ESK2. Plan notes are changed to retain the existing transformer pad and to provide a tap

box for connection of existing to new secondary conductors.

SHEET NO. E301 – ELECTRICAL PLAN – Area A & C – ELK HORN

1. Refer to detail 2/E301. Add Flag Note 4 at equipment marked “HV-1” and “HV-2.” Flag Note 4 shall read:

“PROVIDE RELAY AND FINAL CONNECTION TO MOTORIZED DAMPER FOR OUTSIDE AIR DUCT.

CONNECT MOTORIZED DAMPER TO NEAREST CONTINUOUS 120 VOLT CONVENIENCE

RECEPTACLE CIRCUIT VIA RELAY AND INTERLOCK RELAY WITH HVAC EQUIPMENT ASSOCIATED

WITH MOTORIZED DAMPER. PROVIDE LOW VOLTAGE TRANSFORMER FOR MOTORIZED DAMPER

POWER, IF REQUIRED. COORDINATE ALL REQUIREMENTS WITH MECHANICAL CONTRACTOR

PRIOR TO ROUGH-IN.”



SHEET NO. E501 – ELECTRICAL ACCESS CONTROL PLANS

1. Reissued sheet in its entirety.

CLARIFICATIONS:

1. Refer to LED lighting specifications for information on required maintenance or warranty periods.

QUESTIONS:

Q: Spec section 233113 – Metal Ducts is referenced in places but can’t find it. Will it be in an addendum. A: No spec section is being provided. See Sheet M301 for flag note calling out duct material. Q: Are the boiler clearances as shown on plan correct? A: The boiler clearances are incorrect. The basis of design boilers shall have 3’ minimum in front and 2’ minimum in back. The front of the boilers are facing west on plan. Q: Will a spec section on louvers be included in the addendum? A: No spec section is being provided for louvers. Louvers shall be thin line extruded aluminum stationary louver. Acceptable manufacturers are Ruskin, Greenheck, United Enertech. BID PACKAGE B – Parking Lot/Playground Improvements (Exira) CLARIFICATIONS:

1. The Aquapel is to keep moisture and de-icing salt out of the joints and reduce the likelihood of premature

damage. There are some other acceptable products as well such as TK-Tri-Siloxane 290. The Contractor

shall submit a product brochure of what they plan to use.

2. Testing for paved areas shall include items listed in SUDAS, including: a. Subgrade compaction for sidewalk and parking areas, b. Slump, c. Air Content, d. Core samples to confirm thickness.

3. The concrete mixes shall be per SUDAS unless the Contractor would like to submit an alternate mix for approval.

4. The longitudinal joint on the drive to the north shall have epoxy coated tie bars as per SUDAS.

5. Contractors shall submit a jointing plan for the south lot for review and approval by the Engineer. I would recommend epoxy coated tie bars along the longitudinal joint around the perimeter drive aisle of the south lot as well.


7. The contact for Miracle Recreation is: Boland Recreation – (800) 798-7589.

8. The contact for No Fault Safety Surface is: Boland Recreation – (800) 798-7589.



QUESTIONS:

Q: The print shows that 1” x 36” anchor bolts are required for the pole. the spec’d poles on the fixture schedule are only available with up to 3/4” x 30” anchor bolts. will these bolts be acceptable, or will the next size pole (SSS-25-5G) be needed, where 1” x 36” anchors are used? A: 3/4” x 30” anchor bolts are acceptable. Q: The print shows 1-1/4” pvc being required for the underground conduit to the pole lights. 2 of these poles will need 3 conduits ran into the bottom of them. this will make the room inside the pole VERY tight. If I can, I would like to request reducing the conduit size on these pole bases to 1” to allow for room inside of the pole itself for these conduits. A: 1-inch conduits are acceptable at the affected poles assuming that NEC conduit fill percentages are not exceeded. Q: The spec book shows only 120v rated luminaires. These pole lights appear to be wired at 208v, as they are on a 2-pole breaker. will this still be acceptable? or are we taking a neutral conductor for a multiwire branch circuit and wiring them at 120v? A: The lighting fixture schedule calls for 208V. BID PACKAGE C – Baseball Field Concession Stand (Elk Horn) CLARIFICATIONS:


BID PACKAGE D – Sports Field Lighting (Elk Horn and Exira) CLARIFICATIONS:


END OF ADDENDUM ONE

1016 Leavenworth St

Omaha, NE 68102

402-291-1444

www.kpe-inc.com

Omaha ▪ Des Moines ▪ Bismarck

PRE-BID MEETING AGENDA

PROJECT: Exira-EHK Community School District Capital Improvement Projects KPE# 454-002

MEETING DATE: February 1, 2018, 4:00 pm

LOCATION: 4114 Madison St. Elk Horn, IA 51531

ARCHITECT: KPE Engineers and Architects 1016 Leavenworth St. Omaha, NE 68102 402-291-1444

Attn: Mike McLennan [email protected]

PROJECT DESCRIPTION: See specification Paragraph 1.4 in Section Summary - 011000.

PROJECT TIMELINE:

• Bid Due Date: February 15, 2018, 2:00 pm

• Award of Contracts: February 19, 2018

• Start of Contracts: Notice to Proceed and Contracts to be executed immediately following award of contract

• Bid Package A – Miscellaneous Improvement Projects (Elk Horn and Exira)

1) On-site work to commence on May 28, 2018, or first day after the Spring Semester ends.

a. Limited work activities may be able to occur prior to May 28, 2018 with advance approval.

2) Substantial Completion by August 8, 2018.

3) Final completion by August 17, 2018.

• Bid Package B – Parking Lot/Playground Improvements (Exira)

1) On-site work to commence immediately, weather permitting.

a. North Parking Lot and Drop-Off to be completed first.

2) Substantial Completion by August 17, 2018.

3) Final completion by August 30, 2018.

• Bid Package C – Baseball Field Concession Stand (Elk Horn)

1) On-site work to commence immediately, weather permitting. 2) Substantial Completion by May 15, 2018. 3) Final completion by June 1, 2018.

• Bid Package D – Sports Field Lighting (Elk Horn and Exira)

1) On-site work to commence immediately, weather permitting. 2) Substantial Completion by May 15, 2018 at Elk Horn and August 8 at Exira. 3) Final completion by August 17, 2018.

mailto:[email protected]

EXIRA-EHK COMMUNITY SCHOOL DISTRICT Page 2 Capital Improvement Projects Pre-Bid Meeting Agenda

Omaha ▪ Des Moines ▪ Bismarck

Any inconsistencies, ambiguities, questions, etc. should be brought to KPE’s attention immediately. No oral interpretations of any part of the documents will be considered official. All questions shall be in writing, and all interpretations will be issued by Addendum. Questions: All questions for the project shall be received no later than Friday, February 9, 2018 at 2:00 p.m. Plan Holder List: Standard Digital Imaging, Phone (402) 592-1292, www.standardshare.com. Contract

• Each Bid Package to be performed under a single prime contract.

• Form of contract will be the AIA 101-2017 Standard Form of Agreement Between Owner and Contractor

• There are no Liquidated Damages associated with these projects.

• Bid Security and Performance/Payment bond required. Examination of Site Owner Comments Questions from Bidders Tour

http://www.standardshare.com/

EEHK COMMUNITY SCHOOL DISTRICT INDOOR, INDIRECT, GAS-FIRED HEATING AND VENTILATING UNITS

MISCELLANEOUS IMPROVEMENT PROJECTS 237333.16 - 1

KPE #454-002 BID PACKAGE - A

SECTION 237333.16 - INDOOR, INDIRECT, GAS-FIRED HEATING AND VENTILATING UNITS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. Section includes indirect, gas-fired heating and ventilating units.

1.3 DEFINITIONS

A. DDC: Direct digital control.

1.4 ACTION SUBMITTALS

A. Product Data: For each type and configuration of indoor, indirect, gas-fired heating and ventilating unit.

1. Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories.

B. Shop Drawings: For each type and configuration of indoor, indirect, gas-fired heating and ventilating unit.

1. Signed, sealed, and prepared by or under the supervision of a qualified professional engineer.

2. Include plans, elevations, sections, and attachment details. 3. Include details of equipment assemblies. Indicate dimensions, weights, loads, required

clearances, method of field assembly, components, and location and size of each field connection.

4. Detail fabrication and assembly of gas-fired heating and ventilating units, as well as procedures and diagrams.

5. Design Calculations: Calculate requirements for selecting vibration isolators and for designing vibration isolation bases.

6. Vibration Isolation Base Details: Detail fabrication including anchorages and attachments to structure and to supported equipment. Include auxiliary motor slides and rails, and base weights.

7. Include diagrams for power, signal, and control wiring.

1.5 INFORMATIONAL SUBMITTALS

A. Startup service reports.

B. Sample Warranty: For manufacturer's special warranty.




1.6 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data: For indirect-fired heating and ventilating units to include in emergency, operation, and maintenance manuals.

1.7 MAINTENANCE MATERIAL SUBMITTALS

A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Filters: One set(s) for each unit. 2. Fan Belts: One set(s) for each unit.

1.8 QUALITY ASSURANCE

A. Comply with NFPA 70.

B. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and Equipment" and Section 7 - "Construction and Startup."

C. ASHRAE/IES 90.1 Compliance: Applicable requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and Air-Conditioning."

1.9 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of indirect, gas-fired heating and ventilating units that fail in materials or workmanship within specified warranty period.

1. Warranty Period for Heat Exchangers: Manufacturer's standard, but not less than five years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. AbsolutAire, Inc. 2. CaptiveAire Systems. 3. Greenheck Fan Corporation. 4. Modine Manufacturing Company. 5. Trane.

2.2 SYSTEM DESCRIPTION

A. Factory-assembled, prewired, self-contained unit consisting of cabinet, supply fan, controls, filters, and indirect-fired gas burner to be installed inside the building.




B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

2.3 UNIT CASINGS

A. General Fabrication Requirements for Casings:

1. Forming: Form walls, roofs, and floors with at least two breaks at each joint. 2. Casing Joints: Sheet metal screws or pop rivets, factory sealed with water-resistant

sealant. 3. Factory Finish for Steel and Galvanized-Steel Casings: Apply manufacturer's standard

primer immediately after cleaning and pretreating. 4. Air-Handling-Unit Mounting Frame: Formed galvanized-steel channel or structural

channel supports, designed for low deflection, welded with integral lifting lugs.

5. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

B. Configuration: Horizontal unit with horizontal discharge for suspended installation.

C. Cabinet: Galvanized-steel panels, formed to ensure rigidity and supported by galvanized-steel channels or structural channel supports with lifting lugs. Duct flanges at inlet and outlet.

D. Outer Casing: 0.0598-inch- thick steel with heat-resistant, baked-enamel finish over corrosion-resistant-treated surface in color to match fan section.

E. Inner Casing:

1. Burner Section Inner Casing: 0.0299-inch steel. 2. Double-wall casing with inner wall of solid steel, for the following sections:

a. Blower section. b. Filter section. c. Mixing box. d. Inlet plenum. e. Discharge plenum. f. Access Doors: Lift out or Hinged with handles for burner and fan motor

assemblies on both sides of unit.

3. Internal Insulation: Fibrous-glass duct lining, neoprene coated, comply with ASTM C 1071, Type II, applied on complete unit.

a. Thickness: 2 inches. b. Insulation Adhesive: Comply with ASTM C 916, Type I. c. Density: 1.5 lb/cu. ft.. d. Mechanical Fasteners: Galvanized steel suitable for adhesive, mechanical, or

welding attachment to casing without damaging liner when applied as recommended by manufacturer and without causing air leakage.

F. Discharge Section: Trapezoidal cowls with horizontal louvers.

G. Discharge Section: Plenum with two sides louvered.

H. Casing Internal Insulation and Adhesive:




1. Materials: ASTM C 1071, Type I or Type II. 2. Location and Application: Factory applied with adhesive and mechanical fasteners to the

internal surface of section panels downstream from, and including, the heating-coil section.

a. Liner Adhesive: Comply with ASTM C 916, Type I. b. Mechanical Fasteners: Galvanized steel, suitable for adhesive, mechanical, or

welding attachment to duct without damaging liner when applied as recommended by manufacturer and without causing leakage in cabinet.

c. Liner materials applied in this location shall have airstream surface coated with a temperature-resistant coating or faced with a plain or coated fibrous mat or fabric, depending on service-air velocity.

3. Location and Application: Encased between outside and inside casing.

I. Inspection and Access Panels and Access Doors:

1. Panel and Door Fabrication: Formed and reinforced, single- or double-wall and insulated panels of same materials and thicknesses as casing.

2. Inspection and Access Panels:

a. Fasteners: Two or more camlock type for panel lift-out operation. Arrangement shall allow panels to be opened against air-pressure differential.

b. Gasket: Neoprene, applied around entire perimeters of panel frames. c. Size: Large enough to allow inspection and maintenance of air-handling unit's

internal components.

3. Access Doors:

a. Hinges: A minimum of two ball-bearing hinges or stainless-steel piano hinge and two wedge-lever-type latches, operable from inside and outside. Arrange doors to be opened against air-pressure differential.

b. Gasket: Neoprene, applied around entire perimeters of panel frames. c. Size: At least 24 inches wide by full height of unit casing up to a maximum height

of 60 inches.

4. Locations and Applications:

a. Fan Section: Inspection and access panels. b. Access Section: Doors. c. Coil Section: Inspection and access panels. d. Damper Section: Inspection and access panels. e. Filter Section: Inspection and access panels large enough to allow periodic

removal and installation of filters. f. Mixing Section: Doors. g. Humidifier Section: Doors.

5. Service Light: 100-W vaporproof fixture with switched junction box located inside adjacent to door.

a. Locations: Fan section.

J. Condensate Drain Pans:




1. Fabricated with one percent slope in at least two planes to collect condensate from condensate-producing heat exchangers and from humidifiers and to direct water toward drain connection. a. Depth: A minimum of 2 inches deep.

2. Formed sections. 3. Double-wall, stainless-steel sheet with space between walls filled with foam insulation

and moisture-tight seal. 4. Drain Connection: Located at lowest point of pan and sized to prevent overflow.

Terminate with threaded nipple on one end of pan.

a. Minimum Connection Size: NPS 1.

2.4 SUPPLY-AIR FAN

A. Fan Type: Centrifugal, rated according to AMCA 210; statically and dynamically balanced, galvanized steel; mounted on solid-steel shaft with heavy-duty, self-aligning, permanently lubricated ball bearings.

B. Drive: V-belt drive with matching fan pulley and adjustable motor sheaves and belt assembly.

C. Mounting: Fan wheel, motor, and drives shall be mounted in fan casing with elastomeric or spring isolators.

D. Fan-Shaft Lubrication Lines: Extended to a location outside the casing.

2.5 AIR FILTERS

A. Comply with NFPA 90B.

B. Cleanable Filters: Cleanable metal mesh.

1. Thickness: 2 inches.

2.6 DAMPERS

A. Outdoor-Air and Return-Air Damper: Galvanized-steel, opposed-blade dampers with vinyl blade seals and stainless-steel jamb seals, having a maximum leakage of 10 cfm/sq. ft. of damper area, at a differential pressure of 2-inch wg.

B. Damper Operator: Direct coupled, electronic with spring return or fully modulating as required by the control sequence.

2.7 INDIRECT-FIRED GAS BURNER

A. Description: Factory assembled, piped, and wired; and complying with ANSI Z21.47, "Gas-Fired Central Furnaces," and with NFPA 54, "National Fuel Gas Code."

1. CSA Approval: Designed and certified by and bearing label of CSA. 2. Burners: Stainless steel.




a. Gas Control Valve: Modulating. b. Fuel: Natural gas. c. Minimum Combustion Efficiency: 80 percent. d. Ignition: Electronically controlled electric spark with flame sensor.

B. Venting: Power vented, with integral, motorized centrifugal fan interlocked with gas valve.

C. Combustion-Air Intake: Separate combustion-air intake and vent terminal assembly.

D. Heat Exchanger: Stainless steel.

E. Heat-Exchanger Drain Pan: Stainless steel.

F. Safety Controls:

1. Vent Flow Verification: Flame rollout switch. 2. Control Transformer: 24-V ac. 3. High Limit: Thermal switch or fuse to stop burner. 4. Gas Train: Regulated, redundant, 24-V ac gas valve assembly containing pilot solenoid

valve, electronic-modulating temperature control valve, pilot filter, pressure regulator, pilot shutoff, and manual shutoff all in one body.

5. Purge-period timer shall automatically delay burner ignition and bypass low-limit control. 6. Airflow Proving Switch: Differential pressure switch senses correct airflow before

energizing pilot. 7. Automatic-Reset, High-Limit Control Device: Stops burner and closes main gas valve if

high-limit temperature is exceeded. 8. Safety Lockout Switch: Locks out ignition sequence if burner fails to light after three tries.

Controls are reset manually by turning the unit off and on.

2.8 UNIT CONTROL PANEL

A. Factory-wired, fuse-protected control transformer, connection for power supply and field-wired unit to remote control panel.

B. Control Panel: Surface-mounted remote panel, with engraved plastic cover, and the following lights and switches:

1. On-off fan switch. 2. Heat-vent-off switch. 3. Supply-fan operation indicating light. 4. Heating operation indicating light. 5. Thermostat. 6. Damper position potentiometer. 7. Dirty-filter indicating light operated by unit-mounted differential pressure switch. 8. Safety-lockout indicating light. 9. Enclosure: NEMA 250, Type 1.

2.9 CONTROLS

A. Comply with requirements in Section 230923 "Direct Digital Control (DDC) System for HVAC" and Section 230993.11 "Sequence of Operations for HVAC DDC" for control equipment and sequence of operation.




B. Control Devices:

1. Remote Thermostat: Adjustable room thermostat with temperature readout. 2. Remote Setback Thermostat: Adjustable room thermostat without temperature readout. 3. Static-Pressure Transmitter: Nondirectional sensor with suitable range for expected input,

and temperature compensated. 4. Fire-Protection Thermostats: Fixed or adjustable settings to operate at not less than 75

deg F above normal maximum operating temperature. 5. Timers: Solid-state, programmable time control with four separate programs; 24-hour

battery carryover; individual on-off-auto switches for each program; 365-day calendar with 20 programmable holidays; choice of fail-safe operation for each program; and system fault alarm.

6. Ionization-Type Smoke Detectors: 24-V dc, nominal; self-restoring; plug-in arrangement; integral visual-indicating light; sensitivity that can be tested and adjusted in place after installation; integral addressable module; remote controllability; responsive to both visible and invisible products of combustion; self-compensating for changes in environmental conditions.

7. Smoke detectors, located in supply air, shall stop fans when the presence of smoke is detected.

C. Fan Control: Timer starts and stops indirect-fired heating and ventilating unit and exhaust fan(s).

1. Smoke detectors, located in supply air, shall stop fans when the presence of smoke is detected.

D. Mixed Outdoor- and Return-Air Damper Control: When fan is running, outdoor- and return-air dampers shall modulate to supply minimum outdoor air as follows:

1. Minimum 30 percent outdoor air. 2. Outdoor-air quantity adjusted by potentiometer on control panel. 3. Outdoor-air quantity to maintain minimum building static pressure.

E. Temperature Control: Operates gas valve to maintain supply-air temperature. 1. Operates gas valve to maintain space temperature with wall-mounted, field-wired

sensor with temperature adjustment, and adjustment on remote-control panel. 2. Timer shall select remote setback thermostat to maintain space temperature at 60 DegF. 3. Burner Control: Two or four steps of control using one or two burner sections in series.

2.10 MOTORS

A. Comply with NEMA designation, temperature rating, service factor, and efficiency requirements for motors specified in Section 230513 "Common Motor Requirements for HVAC Equipment."

1. Enclosure: Open, dripproof. 2. Enclosure Materials: Cast aluminum.

3. Efficiency: Premium efficient. 4. Service Factor: 1.1.




PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of indirect-fired heating and ventilating units.

B. Examine roughing-in for piping, ducts, and electrical systems to verify actual locations of connections before equipment installation.

C. Verify cleanliness of airflow path to include inner-casing surfaces, filters, coils, turning vanes, fan wheels, and other components.

D. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Equipment Mounting: 1. CoComply with requirements for vibration isolation devices specified in

Section 230548.13 "Vibration Controls for HVAC."

B. Install gas-fired units according to NFPA 54, "National Fuel Gas Code."

C. Install controls and equipment shipped by manufacturer for field installation with indirect-fired heating and ventilating units.

3.3 CONNECTIONS

A. Drawings indicate general arrangement of piping, fittings, and specialties.

1. Gas Piping: Comply with requirements in Section 231123 "Facility Natural-Gas Piping." Connect gas piping with shutoff valve and union and with sufficient clearance for burner removal and service. Make final connections of gas piping to unit with corrugated, stainless-steel tubing flexible connectors complying with ANSI LC 1/CSA 6.26 equipment connections.

B. Drain: Comply with requirements in Section 221316 "Sanitary Waste and Vent Piping" for traps and accessories on piping connections to condensate drain pans under condensing heat exchangers.

C. Where installing piping adjacent to heating and ventilating units, allow space for service and maintenance.

D. Duct Connections: Connect supply and return ducts to indirect-fired heating and ventilating units with flexible duct connectors. Comply with requirements in Section 233300 "Air Duct Accessories" for flexible duct connectors.

E. Ground equipment according to Section 260526 "Grounding and Bonding for Electrical Systems."




F. Connect wiring according to Section 260519 "Low-Voltage Electrical Power Conductors and Cables."

3.4 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory-authorized service representative to test and inspect components, assemblies, and equipment installations, including connections.

B. Perform tests and inspections.

C. Units will be considered defective if they do not pass tests and inspections.

D. Prepare test and inspection reports.

3.5 STARTUP SERVICE

A. Perform startup service.

1. Complete installation and startup checks according to manufacturer's written instructions and perform the following:

a. Inspect for visible damage to burner combustion chamber. b. Inspect casing insulation for integrity, moisture content, and adhesion. c. Verify that clearances have been provided for servicing. d. Verify that controls are connected and operable. e. Verify that filters are installed. f. Purge gas line. g. Inspect and adjust vibration isolators. h. Verify bearing lubrication. i. Inspect fan-wheel rotation for movement in correct direction without vibration and

binding. j. Adjust fan belts to proper alignment and tension. k. Start unit according to manufacturer's written instructions.

2. Complete startup sheets and attach copy with Contractor's startup report. 3. Inspect and record performance of interlocks and protective devices; verify sequences. 4. Operate unit for run-in period recommended by manufacturer. 5. Perform the following operations for both minimum and maximum firing and adjust burner

for peak efficiency:

a. Measure gas pressure at manifold. b. Measure combustion-air temperature at inlet to combustion chamber. c. Measure supply-air temperature and volume when burner is at maximum firing rate

and when burner is off. Calculate useful heat to supply air.

6. Calibrate thermostats. 7. Adjust and inspect high-temperature limits. 8. Inspect dampers, if any, for proper stroke and interlock with return-air dampers. 9. Inspect controls for correct sequencing of heating, mixing dampers, refrigeration, and

normal and emergency shutdown. 10. Measure and record airflow. Plot fan volumes on fan curve. 11. Verify operation of remote panel, including pilot-operation and failure modes. Inspect the

following:




a. High-limit heat. b. Alarms.

12. After startup and performance testing, change filters, verify bearing lubrication, and adjust belt tension.

13. Verify drain-pan performance. 14. Verify outdoor-air damper operation.

3.6 ADJUSTING

A. Adjust initial temperature set points.

B. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

C. Occupancy Adjustments: When requested within 12 months from date of Substantial Completion, provide on-site assistance in adjusting system to suit actual occupied conditions. Provide up to two visits to Project during other-than-normal occupancy hours for this purpose.

3.7 DEMONSTRATION

A. Train Owner's maintenance personnel to adjust, operate, and maintain heating and ventilating units.

END OF SECTION 237333.16

Date post:	11-May-2018
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