EIE326-01_19_10_00_29-2_6.pdf

DORMITORY, 168 PN EIELSON AFB, AK W911KB-14-R-0017

SECTION 01 19 10.00 29 EIE 326

2.6 MECHANICAL

2.6.1 Scope and Objectives

A. Work includes the design and construction of the dormitory, out-buildings, and site appurtenances. Mechanical room / air handler room sizes shown in the room criteria sheets may or may not be appropriate for the contractor’s selection of systems and equipment, and may require adjustment (coordinated with the overall building area summary and Contract limitations).

B. The Design-Build contractor’s Mechanical Engineer of Record shall be responsible for the mechanical design. The design drawings and calculations shall be sealed by the Engineer of Record. The Engineer of Record shall be licensed as a mechanical engineer in the state of Alaska and shall have at least five years continuous experience in a sub-arctic environment.

C. Compliance with ASHRAE 90.1 - 2007 Energy Standard for Buildings Except Low Rise Residential Buildings is required. Consideration of solar gain through glazing is mandatory, in order to minimize overheating of spaces.

D. The mechanical systems for this facility shall be designed in accordance with the Eielson HVAC/R Standards (see Appendix 10).

E. Design and furnish all construction documents, labor, materials, equipment, supervision of labor, and installation, required to completely install satisfactorily operating mechanical and plumbing systems. Major items of work include, but are not limited to, the following systems:

1. General Mechanical Materials and Methods

2. Plumbing

3. Steam Heating System

4. Hydronic (Glycol) Heating

5. Ventilation and Exhaust

6. Heat Recovery

7. Controls and Instrumentation

8. Mechanical / Rooms

9. Air Handler Rooms and Mezzanines

2.6.2 References

A. Eielson AFB Standards (copy available in Appendix 10)

1. 354 CES Utility Metering Requirements (OCT 2013)

2. HVAC/R Standards (APR 2013)

3. Supplemental Mechanical Guide Specifications for Eielson, AFB

4. Utilidor Design Guide (FEB 2013)

5. Mechanical and Plumbing Insulation Guide

6. Fire Alarm Installation Requirements

B. AFM 32-1084 Facilities Requirements (20 APR 2012)

C. TM 5-814-1 / AFM 88-11, Sanitary and Industrial Wastewater Collection – Gravity Sewers and Appurtenances (MAR 1985)

D. Unaccompanied Housing Design Guide, USAF, Jan 2006 (see Appendix 3)

E. Air Moving and Conditioning Association (AMCA)

F. Air-Conditioning and Refrigeration Institute (ARI)

G. All base materials shall comply with standards of ASTM and ANSI.

H. American Air Balance Council (AABC)

I. American Conference of Governmental Industrial Hygienists (ACGIH) – Industrial Ventilation.

J. American Gas Association (AGA)

K. American National Standards Institute (ANSI)

L. American Society for Testing Materials (ASTM)

M. American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE)

N. American Society of Mechanical Engineers (ASME)

O. American Water Works Association (AWWA)

P. American Welding Society (AWS)

Q. ANSI 13.1, Scheme for the Identification of Piping Systems

R. AWWA C651, Disinfecting Water Mains

S. Cast Iron Soil Pipe Institute (CISPI)

T. Environmental Protection Agency (EPA)

U. ER 1110-345-700, Design, Analysis, Drawings and Specifications

V. ETL 01-1, Reliability and Maintainability (R&M) design checklist

W. Fire Prevention Code (NFPA 1)

X. Hydraulic Institute (HI)

Y. International Association of Plumbing and Mechanical Officials (IAPMO)

Z. International Building Code, 2012 (IBC)

AA. International Mechanical Code 2012 (IMC)

BB. International Plumbing Code 2012 (IPC)

CC. National Bureau of Standards (NBS)

DD. NFPA 70, National Electrical Code, 2012 (NEC)

EE. National Electrical Manufacturers Association (NEMA)

FF. National Environmental Balancing Bureau (NEBB)

GG. Occupational Safety and Health Administration (OSHA)

HH. Air Force Occupational Safety and Health Standard 91-501 (AFOSH), 31 Jan 2012

II. Plumbing and Drainage Institute (PDI)

JJ. Sheet Metal and Air Conditioning Contractors' National Association (SMACNA)

KK. State of Alaska, Department of Environmental Conservation Requirements (ADEC)

LL. Testing, Adjusting, and Balancing Bureau (TABB)

MM. TI-800-01, Design Criteria

NN. TM 5-805-4, Noise and Vibration Control (DEC 2007)

OO. UFAS, Uniform Federal Accessibility Standards

PP. UFC 3-310-04, Seismic Design for Buildings, 01 JUN 2013

QQ. UFC 3-401-01, Mechanical Engineering, 01 JUL 2013

RR. UFC 3-410-01FA, Design: Heating, Ventilating, and Air Conditioning Systems, 01 JUL 2013

SS. UFC 3-600-01, Fire Protection Engineering for Facilities, 01 MAR 2013

TT. UFC 4-010-01, DOD Minimum Antiterrorism Standards for Buildings, 01 OCT 2013

UU. Underwriters' Laboratories, Inc. (UL): All equipment shall bear the UL label or equivalent from a nationally recognized independent testing agency acceptable to the authority having jurisdiction.

2.6.3 Unified Facilities Guide Specifications (UFGS). The following UFGS shall be incorporated into the Designer-of-Record’s specification set (see 01_19_20.00_29), at a minimum:

A. 22 00 00 – Plumbing, General Purpose

B. 22 05 48.00 20 – Mechanical Sound, Vibration, and Seismic Control

C. 23 00 00 – Air Supply, Distribution, Ventilation, and Exhaust System

D. 23 05 48.00 40 – Vibration and Seismic Controls for HVAC Piping and Equipment

E. 23 05 93 – Testing, Adjusting, and Balancing for HVAC

F. 23 07 00 - Thermal Insulation for Mechanical Systems

G. 23 08 00.00 10 - Commissioning of HVAC Systems

H. 23 09 23.00 29 - Direct Digital Control for HVAC, BACnet, CEPOA Specific

I. 23 22 13.35 40 – Steam Traps

J. 23 22 23.00 40 – Steam Condensate Traps

K. 23 22 25.00 40 – Steam Valves

L. 23 23 00 - Refrigerant Piping

M. 23 57 10.00 10 – Forced Hot Water Heating Systems Using Water and Steam Heat Exchangers

N. 23 72 00.00 10 – Energy Recovery Systems

O. 23 81 23.00 20 – Computer room Air Conditioning Units

P. 23 82 00.00 20 – Terminal Heating Units

2.6.4 Design Criteria

A. General Design Conditions: The mechanical systems for this facility shall be designed in accordance with the references listed above and for the design conditions listed below.

B. System Description –The heating system shall consist of a steam to glycol heating system.

Base steam shall be routed through shell and tube heat exchangers to heat a secondary pumped glycol system. Heat shall be supplied to the building terminal units and heating coils.

Variable volume air handlers shall be used to provide ventilation and air to all occupied spaces and a heat recovery unit shall be used to reclaim heat from building exhaust systems.

Table, Inside Design Conditions Room(s) Cooling Heating Comment

Dry Bulb Temperature

Dry-Bulb Temperature

Offices, Fitness, Day Room 78°F 68 F

Mechanical Rooms, Air Handler Rooms, Storage

10°F above ambient

55˚F

Communication Rooms, Stairways, Vestibules

80°F 65˚F

Electrical Room 10°F above ambient

55°F

Modules, Mail, Vending, Corridors, Public toilet

78 F 68 F

Project Location:

Eielson AFB, Alaska

Elevation: 561 ft Heating Degree Days:

Base 65°F

13,985°F-Day

Outside Design Air Temperatures:

Winter: minus 60 F DB

Summer: 81 FDB

62 FWB

Safety Factors:

Transmission Heat Loss 1.20 Infiltration 1.20 Total Heat Loss 1.20 Ventilation Heat Loads 1.20

1. Infiltration: The building infiltration rate shall be based on the ASHRAE crack method with a 60-kph (40 mph) design wind speed. Assume 4 air changes per hour infiltration at arctic entries.

2. The design room noise criteria (NC) inclusive of all mechanical equipment shall comply with ASHRAE 2007 Handbook, Applications, Chapter 47 and the following:

Offices and general admin. spaces RC(N) 25 to 35 Common areas RC(N) 30 to 40 Modules RC(N) 25 to 35 Mechanical and Electrical Rooms per OSHA

2.6.5 General Mechanical Materials and Methods:

A. Full access for maintenance of mechanical equipment shall be provided. The area or structure where equipment is located, and the equipment itself, shall allow sufficient clearance for removing coils and filters without having to remove piping, structure, doors or other surrounding items. Access to all mechanical equipment shall be unhindered and a minimum of 3 ft wide by 6 ft high. Access shall not require crawling over or under structure, pipes or other items. Stairs with handrails shall be provided when equipment is located in a basement, or on a mezzanine greater than 18 inches above finished floor. Catwalks, operating platforms, ladders, and guardrails shall be provided to facilitate access, for maintenance and testing, to all equipment above four feet and as required by OSHA.

1. These platforms and catwalks are required for equipment requiring regular maintenance and inspection such as air handlers, water heaters, furnaces, and similar equipment. The platforms and catwalks are not required for smoke detectors, and lights.

B. Motors: Single-phase, fractional-horsepower, alternating-current motors shall be high efficiency types, corresponding to the applications listed in NEMA MG 11. Polyphase motors shall be selected based on premium efficiency characteristics relative to the applications as listed in NEMA MG 10. Additionally, all polyphase squirrel-cage medium-induction motors with continuous ratings shall meet or exceed energy efficient ratings in accordance with Table 12-10 of NEMA MG 1. If available, all motors shall be premium efficiency type.

1. All motors 5 H.P. and greater shall have phase and voltage protection.

C. Variable Frequency Drives: The same manufacturer shall provide all variable frequency drives (VFD’s) used on electric motors for system components. Variable frequency drives shall be solid state, with a Pulse Width Modulated output waveform. The VFD’s shall employ a 12 pulse full wave rectifier, DC Line Reactor, capacitors and insulated Gate Bipolar Transistors as the output-switching device. The drive efficiency shall be 97% or better at full speed and full load.

Fundamental power factor shall be 0.98 at all speeds and loads. Enclosure shall be NEMA Type 1, or as dictated by location. The VFD’s shall have a door interlocked disconnect switch and a manual bypass switch, which allows servicing of the drive while the driven equipment is operating. Variable frequency drives must be set-up during testing and balancing procedures. A DDC control interface shall be provided to allow for remote monitoring of VFD functions.

1. Provide a bypass switch and magnetic starter for across-the-line start as an integral part of the drive.

2. Provide automatic restart on under voltage, overvoltage, and phase loss.

D. All equipment shall be protected from corrosion. For products with protective coatings, specifications shall be written to require the products’ corrosion protection bond to pass one of the industry standard adhesion tests.

E. Exterior mounted air handlers, fans, and other mechanical equipment are not allowed.

F. Mechanical piping, ducts, equipment and other components shall not be suspended from metal roof decks. Attachments shall be to framing members as described in Structural requirements.

G. Perform testing, adjusting, balancing, and commissioning per UFGS 23_05_93, Testing, Adjusting, and Balancing for HVAC and 23_08_00.00_10 Commisioning of HVAC Systems.

1. Duct Air Leakage Testing (DALT) is NOT required on this project, and requirements for

DALT may be edited out of UFGS 23_05_93, since all ductwork on the project is sealed to Class A (make appropriate edits to UFGS 23_00_00, Air Supply, Distribution, Ventilation, and Exhaust System). Reference paragraph 2.6.13.D.12.

H. Mechanical Equipment Redundant Capacity

1. For the basic system design the following system components shall be redundant:

a. Heating system pumps

b. Steam to water heat exchanger need not be redundant, but a spare tube bundle shall be provided (stored in a padded shipping container).

I. General Piping Minimum Requirements

1. The following items are typical for all piping installations.

a. Close all openings in pipes with appropriate caps, plugs or covers during progress of the work to preclude introduction of undesirable materials or contaminants.

b. Slope all pipelines and provide low point drains using hose end gate valves, and provide high point vents, using specified automatic air vents. All air vents shall have the discharge piped down to the nearest floor drain or terminate 6 inches above floor where drains are not located in the same area as the vent.

c. Provide valves and unions adjacent to all tanks and equipment for isolation and removal purposes. All valves shall be installed with stems vertical wherever possible, and in no case shall stems be oriented below horizontal.

d. Ream ends of all pipes to full diameter free of burrs, nicks and sharp edges.

e. Cut pipe accurately from measurements taken on the site. Springing or bending to fit on make up pipe will not be permitted.

f. Bushings will not be permitted except on tanks and similar equipment. Close nipples will not be permitted.

g. Reduction of pipe sizes shall be made with reducing tees or reducing fittings.

h. All pipelines except piping under slab on grade shall be installed parallel with building lines and as high as possible. Piping shall clear all doors, windows and other openings. Avoid all ducts, light fixtures and similar equipment and conceal in finished areas wherever possible.

i. Piping shall be supported in a manner to prevent binding, undue swing and vibration transmission to the structure.

j. Where multiple pipes are clustered and routed in parallel, use trapeze hangers.

Provide adequate space between pipes to allow for work / maintenance on individual pipe runs.

k. Piping within finished rooms shall be concealed above suspended ceilings or within new walls and pipe chases.

l. Coordinate the placement of concealed items requiring future maintenance, adjustment or replacement in such a manner that provides full access from an access panel, door, or suspended ceiling. Where needed, provide the access panel or door to these items; fire rated where dictated.

m. Threaded Joints: Apply Teflon tape to male equipment threads.

n. Soldered Joints: Use Type 95/5 Tin-Antimony or an IAPMO approved, lead-free solder, for copper tubing.

o. Ring gaskets, spiral wound with centering ring, shall be used with all flanges.

p. Arrange piping along walls in horizontal groups, each group to be in one plane.

q. Locate thermometers and gauges to permit observation by personnel standing on floor.

r. Provide standard size gate or ball valves at pressure gauges.

s. Provide insulating couplings, dielectric nipples or flanges to prevent electrolysis at dissimilar metal piping connections.

t. Unions for copper piping shall be brass.

u. Field check all valves for packing and lubricant. Replace leaking packing.

v. Install valves to be accessible from floor level, or provide access ladders and platforms. Do not install valves with stem pointing downward.

w. Provide isolation valves near all mechanical equipment requiring service. Provide isolation valves at each toilet group, for hot and cold water supply.

x. Provide valves same size as line size. All ball valves shall be full port.

y. Install swing checks and gravity closing lift checks in horizontal position.

z. Provide gate blowdown valves and hose adapters at strainers, valves shall be the same size as strainer blowoff connection. Provide end caps at all hose adapters and drain down valves.

aa. Provide nickel or chrome-plated escutcheons on all pipes passing through walls, floors and ceilings in finished areas, and where piping is in corridors, closets or cabinets and subject to view when doors are open. Escutcheons shall cover the pipe sleeve and shall be set with screws or springs for holding plate in position.

bb. Provide chain drives on all valves over seven feet high.

2. Design and install piping with provisions for expansion and contraction using expansion loops, swing or expansion joints where required. Provide for expansion and contraction in mains, risers, and runouts. Do not spring or force piping during installation.

3. Flush all piping systems with clear water. Operate valves and other system components;

drain and sterilize domestic water systems in accordance with requirements of AWWA C651 entitled: "Disinfecting Water Mains". Following sterilization, water samples shall be taken from the most remote hot and cold faucets in each wing of each floor. Water samples shall be tested for total coliform organisms in accordance with AWWA Standards using either the multiple tube fermentation technique or the membrane filter technique. Sterilization shall be repeated until all tests indicate the absence of coliform organisms.

4. Test all piping systems before concealing piping. Before testing, isolate or remove all equipment from system that would be damaged by test pressure. Purge or bleed air from piping systems before performing hydrostatic testing. Perform hydrostatic or pneumatic tests on piping in accordance with the following schedule. Maintain pressure for at least 24 hours.

SYSTEM TEST MEDIUM TEST PRESSURE

Heating Water Water

150 psig

Domestic Water Water

150 psig

Soil, Vent and Waste Water

10 feet, or top of vent

Rain Water Leaders Water

10 feet, or top of roof

2.6.6 Pipe Sleeves:

A. Provide sleeves where pipes pass through walls, floors or ceilings. Sleeves in bearing walls, foundations, masonry or concrete walls and slabs shall be black steel pipe. Sleeves shall be set in place during the construction of the walls and floors. All sleeves through frame or similar construction shall be 20 gage galvanized sheet metal with edges turned 15 mm (1/2 inch), installed flush with both sides of wall partition. All sleeves shall be flush with surfaces except mechanical rooms, basement floor and any wet floor area where seepage may occur. In such areas the sleeves shall project a minimum of 1 inch above floor.

B. Size sleeves to allow 1/2 inch annular space between pipe insulation, or the bare pipe, and the pipe sleeve. The space between pipe and sleeve shall be filled with mineral wool or other non-combustible material to prevent passage of fire and smoke. The non-combustible material shall be caulked between pipe and sleeve at wall surface. Caulking used at non-rated membranes may be any suitable material that is compatible with pipe coverings. Caulking used at fire rated assemblies shall have suitable smoke and flame retarding capabilities to maintain ratings of the assembly as evidenced by U.L. testing and labeling.

C. Where sleeves are installed in walls with high sound transmission loss or sleeve serves vibration-isolated pipe, sufficient space shall be provided between pipe and sleeve and packed with multiple layers of high-density sponge neoprene to reduce transmission of sound. Allow space on each side of opening and cover neoprene with non-combustible material and caulking, as required to seal opening in accordance with above requirements. Provide sound dampening sleeves at all mechanical rooms, air handler rooms and conference room penetrations.

D. For piping passing through sleeves in areas containing floor drains and in waterproof construction, caulk annular space between pipe or pipe insulation and the enclosing sleeve to attain a watertight installation. Caulk and finish with sealing compound.

2.6.7 Piping Hangers and Supports

A. All piping within the confines of the building shall be rigidly supported from the building structure by means of hangers or supports.

B. Support piping to maintain required grading and pitching of lines, to prevent and/or dampen excessive vibration, to secure piping in place and prevent any undue strain on the connected equipment. Lateral support against earthquake-induced forces shall be accomplished by positive attachments without consideration of friction.

C. Arrange supports to provide for expansion and contraction. No drilling of structural members will be permitted. Hangers and supports shall have a minimum safety factor of 5, based upon ultimate tensile or compressive strength, as applicable of material used.

1. Provide bracing to prevent lateral motion.

2. Provide plastic-coated hangers and supports for copper pipe.

3. Provide galvanized hangers and supports for galvanized piping.

4. Do not support weight of piping from mechanical equipment, ductwork, pump flanges, coil connects, or piping of other trades and related items.

5. Provide insulation shields between hanger or support and piping for insulated piping.

Select and size all pipe supports and hangers to allow continuous insulation through each.

6. Provide retaining clamp on all C-clamps and beam clamps.

7. Chain or strap hangers (plumbers tape) will not be permitted.

8. Support vertical lines at bases with riser clamps.

9. Provide trapeze type hangers for multiple parallel horizontal pipes. Each individual pipe shall be secured to each trapeze hanger.

10. Do not bend pipe hanger rods to provide alignment of piping offset from overhead supports.

11. Provide additional support for heavy valves, specialties, and sway bracing where required.

12. Provide pipe guides, anchors and expansion joints for all heating pipes, with one guide on each side of every expansion joint.

D. Pipe Hanger Schedule: refer to UFGS 13_48_00.00_10, Seismic Protection of Mechanical Equipment for pipe hanger spacing and rod sizes.

2.6.8 Component Identification

A. Piping Identification

1. Contractor shall provide pipe markers that identify all installed piping. Markers shall be pre-manufactured full wrap-around type labels sized to match the outer diameter of the pipe or pipe insulation. Pipe markers shall indicate fluid type, piping system identification and flow direction.

2. Piping identification label shall be black letters, not less than 2 inch high. Directional arrows shall be black, not less than 2 inch long, on yellow background. Piping identification and directional arrows shall meet ANSI A13.1-81.

3. Identify piping at 15 ft. centers in all rooms, as well as in all the other spaces (such as shafts) in which piping may be viewed. There shall be at least one set of identifying bands per pipe in each space requiring identifying bands. In addition, the origination of each pipe main shall be further identified indicating the zone served.

B. Valve Identification

1. Identify valves in all areas with 2 inch x 4 inch identification tags installed on handwheels or stem with brass bead chain. Identification tags shall be engraved, indicating the service abbreviation, stating whether normally open (engraved on green) or normally closed (engraved on red). Install tags with brass jack chain on handwheel or stem.

2. Service abbreviation shall match piping service identification label. In addition, each valve tag shall include a unique sequential identification number. Where valves are located above suspended ceilings, provide colored pin markers in ceiling tiles to allow location of valves.

C. Equipment Identification

1. Manufacturer's nameplates shall be provided on all equipment identifying manufacturer's name, model number, size, capacity, and electrical characteristics. Leave manufacturer's nameplates clean and legible.

2. Identify all equipment with engraved identification tags showing symbol number and service as shown on the final design drawings. Securely fasten identification tags to equipment. For electrically operated items provide an engraved identification tag on the associated controller and/or electric disconnect switch identifying equipment controlled.

D. Identification Charts

1. Provide laminated charts. Pipe identification chart shall list piping systems with symbol and color-coding where applicable. Valve identification chart shall list valve model numbers and symbol for service corresponding to piping symbol. Mount identification charts in Mechanical Rooms, Air Handler Rooms, compressor rooms, and Fire Protection Equipment Room.

E. Duct Identification

1. Identify all primary outside, return, exhaust and supply air ducts with black-stenciled letters applied directly to duct or insulation, if applicable. Supply air duct identification shall include zone or space served. Arrows shall be stenciled on all ducts indicating direction of airflow. Duct identification and arrows shall be located at 10 foot intervals along duct runs and on each side of wall, floor or partition penetrations.

2. Provide labeling of all fire dampers in accordance with NFPA 90A. Where dampers are located above suspended ceilings, provide colored pin markers in ceiling tiles to allow location of fire dampers.

2.6.9 Insulation

A. General:

1. All insulation materials, including linings, jackets, facings, wet or dry adhesives, and vapor barriers, shall meet requirements of NFPA 90A. Flame spread rating shall not exceed 25 and smoke developed rating shall not exceed 50, as defined in ASTM E84.

2. Provide insulation on all hydronic heating, domestic water piping systems, rain leader, vent through roof, outside air intake duct, exhaust duct near exterior penetrations, and as specified in UFGS 22_07_19.00_40 and 23_07_00 specifications, and in the Eielson AFB HVAC Insulation Guide. Provide complete with vapor barrier permeability rating of 1 perm, and with a thermal conductivity of k=0.25 btu/min-sq ft-deg. F. at 100 degrees F mean temperature. Insulation shall be provided on all piping, flanges, valves, accessories, and appurtenances for each system. Tanks (except expansion tanks and glycol make-up tanks), heat exchangers and pumps that are not factory insulated shall be insulated in the field.

3. Provide PVC pipe fitting covers and seal ends of fiberglass insulation with mastic.

4. Provide cold and refrigeration piping systems with a continuous vapor seal. No staples or pins are permitted on cold water piping system insulation.

5. All non-factory finished fiberglass insulation shall be finished with glass cloth and two coats of mastic.

6. Piping insulation shall be continuous at all hangers and supports with rigid inserts and sheet metal shields.

7. Rigid Insulation Inserts for Pipe: Calcium silicate, or approved substitute, for installation between pipe and hanger. Provide cellular foam glass inserts for all cold piping systems.

Insulation inserts shall be not less than 9 inches long for 2-1/2 inch to 6 inch pipe;

thickness equal to adjoining insulation.

8. Galvanized Metal Shields: 16 gauge for 3-1/2 inch and smaller pipe, and 14 gauge for 4 inch and larger; formed to fit the diameter of the insulation, extending up to the centerline of the pipe. Length equal to insulation hanger inserts.

B. Metal Jackets

1. Aluminum jackets shall be 0.025 inch thick, have an embossed finish, and meet ASTM B209. Jacket sections shall be joined using longitudinal slip joints with a minimum 2 inch lap, caulk, and seal between all metal seams. Jacket shall be secured with 1/2 inch wide by 0.31 inch thick annealed stainless steel bands.

2. Provide aluminum jackets on all insulated piping exposed in finished areas, in mechanical equipment rooms, and fire protection equipment rooms up to 10 feet above finished floor and within 10 feet any direction of gratings, mezzanines, retraction equipment, maintenance locations or similar conditions where physical contact can occur.

C. Piping Insulation

1. Hydronic Heating Piping, Chilled Piping, Steam, Condensate: Follow Eielson AFB Insulation Guide.

2. Domestic Hot, Cold, and Recirculation Piping: All pipe sizes, 1 inch thick.

3. Piping Subject to Outside Ambient Temperatures: All pipe sizes, 1-1/2 inch thick.

4. Roof Drainage: 1 inch thick.

5. Plumbing vents: 48 inches below roof insulation to termination above roof line, 1 inch thick.

D. Ductwork Insulation: Provide exterior insulation on all supply air ducts, outdoor air inlet ducts, all outdoor air inlet plenums, all relief air ducts, all relief air plenums, on the first 60 inches of exhaust ducts upstream of exterior wall/roof penetrations, and as required by the Eielson AFB Insulation Guide and UFGS 23_07_00 Thermal Insulation for Mechanical Systems (most stringent criteria is to be applied to the design). Duct Insulation shall be rigid fiberglass with a k=0.020 Btu/ ft-hr-°F at 75 degrees F or better. All ducts requiring insulation shall be covered with minimum 2 inch thick insulation. All insulation shall be finished with glass cloth embedded between two (2) coats of a vapor barrier mastic adhesive.

2.6.10 Vibration Isolation:

A. Furnish and install vibration isolating mountings and hangers for all equipment having reciprocating or rotating parts and for any other equipment, piping, or vessels that produce or transmit objectionable vibrations, pulsations, or noises.

B. Furnish vibration isolators in the proper load range for the weight of the equipment supported.

The natural frequency of the isolator shall be one-third to one-fifth of the lowest vibration frequency of the equipment or system where the isolator is used. When the equipment is mounted on a structure that is not rigid, the resilient mounts shall provide deflection that is at least four times the dead load deflection of the supporting structure. Isolators shall be selected so that deflection of each isolator on a piece of equipment is essentially identical.

C. The following listed equipment shall be fitted with earthquake bracing and snubbers for seismic control in accordance with UFGS 22_05_48.00_20 and 23_05_48.00_40. Such items shall be as manufactured by Mason Industries, Inc. or approved equal.

1. Air-handling units and Furnaces

2. Heat Exchangers

3. Expansion tanks

4. Unit heaters

5. Hot Water Generators

6. Utility fans

7. All other central equipment, machinery, emergency power generator and tanks shall be fitted with bracing, anchors or snubbers for seismic control per UFC 3-310-04. Lateral support against earthquake-induced forces shall be accomplished by positive attachments without consideration of friction.

D. Two nuts shall be provided on each bolt for equipment secured with cast in place, expansion or chemically bonded anchor bolts.

E. All vibrating equipment and the interconnecting pipe and ductwork shall be isolated to eliminate the transmission of objectionable noise and vibration from the structure.

F. Provide vibration hangars to support and isolate all piping and ductwork runs within the first 2 m nearest the connection to rotating equipment.

G. Vibration mounting isolator sizes shall be determined by the isolator manufacturer and shall be installed in accordance with the manufacturer's instructions.

H. See paragraph 2.6.16 for additional requirements for seismic protection.

2.6.11 Plumbing System

A. Provide complete domestic water, waste and rainwater systems designed and sized to serve all plumbing fixtures, and drains as described within this RFP and the room criteria sheets. Slope all slabs to drains.

B. Design Criteria

1. The domestic water, waste and rainwater systems shall be designed, sized, constructed, tested, and inspected, in accordance with the International Plumbing Code. Do not connect storm drain to sewer piping service except as noted below.

2. All domestic water piping shall be sized for a maximum pressure drop of 5 psi/ 100 feet of piping, and a maximum velocity of 6 ft/s.

3. All rainwater leader sizing shall be based on a design roof water flow intensity of 1-1/2 inches/hr plus snowmelt from warm rain/sun and roof heat loss. Primary roof drainage shall drop vertically inside the building, extend below grade, and then run horizontally to the exterior, for extension to the site drainage system (see Civil paragraph 2.3.11). The primary roof drain systems shall also have overflow downspouts. The minimum leader pipe size shall be 3 inch. Provide separate secondary overflow roof drains, piping, and downspouts per IPC. Provide heat tape for all piping and components subject to freezing, especially at downspouts, etc.

4. Provide hot water heaters sized in accordance with UFC-3-420-01. Water heaters shall be steam heat exchangers manufactured by Aerco (or approved equal) with helical coils and minimum 120-gallon storage tank. The domestic hot water supply temperature shall be stored at 140 degrees F and tempered to 120 degrees F, adjustable.

5. Coordinate the Sewer system drainage with the site requirements, see paragraph 2.3.15.

6. Lift Stations are not allowed.

7. Multiple sewer main connections are permissible, if deemed cost effective. Provide a yard cleanout for each service connection.

8. Install a domestic service water meter with strainer and a three-valve, by-pass line (see 354 CES Maintenance Engineering Metering Requirements). Meter shall have totalizers (see paragraph 2.6.15.B).

9. Floor drains shall be located at all low points of floors in rooms with plumbing; install trap primers, unless indicated otherwise. Provide floor drains in Mechanical, Air Handling, and Fire Equipment rooms sized and located to accept full discharge from relief valves, backflow preventers, sprinkler drip checks, etc. Also provide drains located to accept indirect discharge drain pipe from air handler wash down drain pans.

10. To minimize potential for freeze problems, the designer or Contractor shall not locate any domestic water, rainleader, waste, vent, or other piping susceptible to damage in exterior walls.

C. Materials

1. Roof drains shall be 14 inch diameter cast iron with bayonet type locking gravel guard, cast iron strainer/dome, and under-deck clamp. Zurn Z-100 series or approved equal.

Coordinate drain location and installation requirements with roof design and construction.

Refer to Architectural.

2. Domestic water piping shall be type L copper tubing conforming to ASTM B88 with ANSI B16.22 fittings. Solder shall conform to ASTM B32, 95-5 tin antimony or IAPMO approved lead free. Above grade waste, drain, & vent piping shall be CISPI 301 cast iron no-hub with cast iron couplings. For forced discharge mains, use DWV copper, Type L, with soldered joints, the same as domestic water piping.

3. Below grade waste drain and vent piping shall be CISPI HSN cast iron hub and spigot with compression type neoprene gaskets.

4. Valves shall be all bronze ball or gate type with a minimum Class 200 pressure rating.

5. Provide plumbing fixtures as indicated in the Room Criteria Sheets. To the greatest extent possible, plumbing fixtures shall be from one manufacturer. All fixtures shall be institutional quality.

6. All counter top sinks (except lavatories) shall be of stainless steel construction; lavatories shall be enameled cast iron. Provide fixtures and faucets complete with all required specialties, trim, supports, and related items.

7. Water closets shall be vitreous china, tank type, elongated bowl with closed front seat and lid. Flush lever shall be metallic, not plastic.

8. Faucets shall be of commercial quality. Lavatory faucets shall be single handle, ceramic cartridge, washer-less type.

9. Bathtubs shall be porcelain on cast iron. Shower heads shall have ball joint for angle adjustment, and be rigidly piped, with secure wall support. Hose spray heads are not allowed, unless required by ADA.

10. Shower heads shall have ball joint for angle adjustment, and be rigidly piped, with secure wall support. Hose spray heads are not allowed, unless required by ADA.

11. Kitchen sinks shall be single compartment stainless steel 18 gage self rimming, 8 inch deep, with sound dampening undercoating. Provide single handle faucet.

12. Laundry tubs shall be of molded fine-celled structural plastic polymer with back ledge;

they shall be directly connected to sewer drainage piping.

AM#5…

13. Provide water conserving fixtures with flow rates no higher than: 0.5 gpm lavatory faucets, 1.6 gallon/flush water closets, 1.0 gallon/flush urinals, 2.2 gpm kitchen sinks, and

2.5 gpm shower tempering valves. The Designer of Record shall be responsible for selecting flow rates that provide the water conservation credits required for LEED certification. …AM#5

14. Provide commercial-grade 90-degree stops (with handles) and escutcheons on all piping connections to fixtures.

15. Furnish chrome plated adjustable cast brass P-trap with tubing drain to wall. Size to match tailpiece with chrome plated escutcheon.

16. Provide barrier-free refrigerated water cooler 8 gal/hr of 50 degrees F water at 90 degrees Fahrenheit air temperature and 80.6 degrees F entering water temperature.

Provide unit with push bars, glass fillers, and satin finish stainless steel cooler top and backsplash.

17. Freeze-proof hose-bibbs, with vacuum breakers, on exterior walls, 3/4 inch cold water supply piping, minimum.

D. Minimum Basic Requirements

1. Each domestic water branch pipe shall be controlled by a ball valve where it connects to the supply main or riser. Each toilet room, group of fixtures, or isolated fixture shall be separately controlled by isolation valves in an accessible location, and provided with access doors.

2. At all fixtures except water closets, install and connect hot water on left and cold water on right, as viewed when facing the fixture.

3. Install water hammer arresters at water connections to shock-producing fixtures and plumbing groups with flush valves or solenoid valves. Water hammer arresters shall be sized and installed per the Plumbing and Drainage Institute (PDI) Standards. Provide an isolation valve and access panel at each water hammer arrester to facilitate ease of future replacement.

4. All domestic hot water systems shall use a recirculation system, piped from each farthest fixture on a supply loop to maintain semi-instantaneous hot water at all fixture. Minimum flow in each recirculation loop shall be 5 gpm. The longest uncirculated branch line shall not exceed 25 feet. The recirculation system shall have electronic mixing control to account for zero demand/variable demand. Controls shall monitor and maintain water temperature within 2 deg. F. Provide Interface to building central DDC system.

5. For domestic hot and cold water lines, provide low point drains to facilitate the drain down of the piping.

6. Pitch underground drainage pipe within the building a minimum of 1/4 inch per foot in the direction of flow. Make changes in direction of drainage lines with 45-degree wyes, long turn wyes, or sweep bends. Use long turn fittings wherever space conditions permit.

Provide waterproofing around all lines penetrating through foundation walls and floor slabs.

7. Provide cleanouts at the base of each stack, each 135 degree change in direction, and at a minimum of 100 feet on-center for horizontal runs. Cleaning screws, deck plates, and other plugs shall be made up with graphite and oil only; use no grease or cement.

8. Pitch plumbing vent lines to allow for drainage of condensation per the IPC.

9. Encapsulate all exposed P-Traps, angle stops, and supply piping, located under handicap accessible lavatories and sinks, with fire resistant, molded foam, insulation per ADA requirements.

10. Traps, valves, water hammer arresters, and automatic devices in concealed piping shall be provided with access doors. The doors shall be stainless steel for toilets and prime-coated for painted areas. Provide U. L. rated access doors to match wall construction rating.

11. Insulate entire length of roof drain and overflow systems above grade. Heat trace roof drains and 3 feet downstream in rain leaders and overflow rain leaders immediately after the roof drains. Also heat trace from one meter upstream of primary and secondary rainwater overflow discharge to daylight downspouts.

12. Plumbing vents shall terminate minimum 24 inch above roof and shall be minimum 3 inches diameter for prevention of frost blockage.

13. Water heaters, tanks, pumps, and other equipment shall be mounted on 4 inch minimum height raised concrete housekeeping pads. Pads shall be sized 12 inch larger than equipment overall.

14. Freeze-proof exterior hose bibbs shall be provided around the perimeter of the new facility at a maximum spacing of 100 feet (walking distance). Provide at least eight (8) freeze-proof exterior hose bibbs.

15. Provide hot and cold water hose bibbs, with appropriate length pressure hose and nozzle, at each heat recovery and ventilation unit that can be washed down.

2.6.12 Hydronic (Glycol) Heating Systems

A. The building shall be provided with a nominal 100 psig steam from the Base steam system to heat an inhibited glycol system. A 1/3, 2/3 pressure reducing station (PRV) shall reduce the high pressure steam to low pressure steam. The PRV station shall include moisture eliminator, bypass, flash tank and relief valves and shall comply with the Eielson Air Force Base Heating Ventilation Air Conditioning Refrigeration Standards. Provide a condensate receiver with steam powered (medium pressure) condensate pump to return condensate. The condensate pump shall be sized to overcome the back pressure of the Base condensate system. Install the condensate receiver in accordance with the requirements of the Eielson Air Force Base Heating Ventilation Air Conditioning Refrigeration Standards.

B. The hydronic heating system shall include steam-to-glycol heat exchanger and circulating pumps to distribute 60/40 ethylene glycol hydronic heating water to all terminal units, heating coils, and other hydronic systems as described in this RFP and the Room Criteria Sheets.

1. Arctic entries shall be heated using cabinet unit heaters or similar devices capable of sufficient output to serve heat loads.

2. The perimeter building spaces and Module rooms shall be heated using baseboard radiation units unless a betterment is provided to install radiant floor heat in the dormitory.

3. Storage spaces may be heated with overhead unit heaters.

4. Each bedroom shall be a separate zone.

5. Thermostats in living units shall be adjustable from 50 deg. F. to 80 deg. F.. Setpoint range shall be indicated by temperature gradations, not warmer-colder labels.

6. Snowmelt system(s) are not required.

C. Design Criteria

1. All terminal units, and reheat coils shall be sized with a 20 degrees F hydronic fluid temperature drop. All terminal units shall be de-rated and selected for a glycol heating solution.

2. All pressure loss calculations shall be corrected for a 60/40 ethylene glycol/water solution if applicable, and all hydronic heating pumps shall have a 1.2 safety factor. All hydronic heating piping shall be sized for a maximum pressure drop of 3.5 feet/ 100 feet of piping.

Water pressure drops shall not exceed 3.5 feet for heating coils and 5 feet for heat exchangers. Maximum heating coil air pressure drop shall be 0.15 inches.

3. The system shall include a minimum of one shell-and-tube heat exchanger (steam to 60/40 ethylene glycol solution). Provide one spare tube bundle per heat exchanger size installed.

4. The hydronic system(s) shall not utilize automatic flow control valves. All balancing of hydronic flows shall be accomplished via manual balance valves.

D. Hydronic Heating Pumps

1. Duplicate pumps shall be provided; one pump shall serve as a standby.

2. Each pump shall be provided with a calibrated bronze discharge balancing valve, check valve and isolation valves. Each pump shall be piped so that one can be removed for maintenance and the other started, without a loss of service to the facility.

3. Each pump shall be provided with a pressure gauge and associated piping and isolation valves to allow reading pump suction and discharge pressure. If one pump should fail, the standby pump shall start providing 100% of the full flow capacity. Pumps shall alternate starting and have run-time inputs to the control system. The DDC system shall automatically perform lead-lag cycling. Each pump shall be provided with a differential pressure switch or current switch with input to the building DDC control system.

4. Isolate piping from pump vibration with flexible connectors. Connectors shall be stainless steel mesh flex connectors on all pump sizes.

5. All motors shall be premium efficiency type if available. Motors for use on 208-volt power shall be nameplate rated for 200 volts.

E. Materials

1. Steam piping shall be ASTM A53, Grade B, black steel, Schedule 40 with steel fittings and welded or flanged joints. Galvanized steel pipe and fittings are not permitted.

2. Steam Condensate piping shall be ASTM A53, Grade B, black steel, Schedule 80 with extra heavy fittings and threaded, welded, or flanged joints. Galvanized steel pipe and fittings are not permitted.

3. The steam condensate receiver shall incorporate a steam pressure-powered pump, installed in accordance with the Eielson Air Force Base Heating-Ventilation-Air Conditioning-Refrigeration Standards. Electric condensate pumps are not permitted.

4. Steam valves shall be cast steel.

5. Non-ferrous piping, valves, and fittings are not permitted in steam and condensate systems.

6. Hydronic heating piping 3 inches and under shall be type L copper tubing conforming to ASTM B88 with ANSI B16.22 fittings. Solder shall conform to ASTM B32, 95-5 tin antimony or IAPMO approved lead free. Piping over 3 inches shall be ASTM A53, grade B, carbon steel with welded or flanged type fittings equal and comparable to the piping.

7. Glycol solution shall be a 60%/40% ethylene glycol/water solution with phosphate-based inhibitors matching those existing throughout the Base. Glycol solution shall be factory premixed with de-ionized or distilled water. Silicon based inhibitors shall not be used (automotive glycol is not permitted). The solution corrosion inhibitors shall be compatible with all wetted parts of the system.

8. Heat exchangers shall be constructed according to ASME requirements for pressures and temperatures encountered and shall be compatible with fluids used.

9. Hydronic system valves shall be all bronze ball or gate type with a minimum 150 psi pressure class rating.

10. Pumps shall be maintenance-free, single stage, in-line or base-mounted, cast iron volute with stainless steel impellers and motor shaft. Each primary glycol circulation pump shall be provided with an alternate backup pump. The pump motors shall be premium high efficiency type. The primary and backup pumps shall be piped and valved so that one can be removed for maintenance and the other started, without a loss of service to the facility. Air handling unit pre-heat coils and entry cabinet unit heaters shall be equipped with 3-way control valves. All other control valves shall be 2-way. The circulation pumps shall be operated through a variable frequency drive, which adjusts the flow based on a pressure sensor in the system piping

11. All pumps shall be system lubricated where possible. Pumps shall be Grundfos, or approved equal. Provide glycol seals in pumps with mechanical seals.

12. For glycol make-up provide a make-up system complete with 50 gallon corrosion-proof tank, shallow well pump with brass impeller, pressure switch, and all necessary interconnecting pipe, wiring, and controls. Packaged systems are not preferred.

13. Baseboard finned tube radiation shall have sloped-top enclosures with ball bearing brackets and cradles in nylon isolators, copper tubing/aluminum finned elements, pencil-proof outlet grills, and 16 gauge enclosure construction.

14. Heating coils shall be ARI 410 certified factory tested for 200 psig working pressure. Coils shall be aluminum finned, copper tube construction. Air handling unit coils shall be minimum one row coils, drainable with factory vent and drain connections. De-rate coils for use with the specified glycol solution

15. In-floor heating piping shall be cross-linked polyethylene with oxygen diffusion barrier in compliance with ASTM F 876.

F. Minimum Basic Requirements

1. Provide automatic air vents at all high points and all hydronic terminal units. Air vents shall be Hoffman 79 or equal. Provide 1/2 inch isolation ball valves. All air vents shall have the discharge piped down to the nearest floor drain or terminated 6 inch above floor where floor drains are not located in the same area as the vent.

2. Provide pressure gauges and Pete’s plugs across heat exchangers, coils, and pumps.

Provide thermometers at all piping connections to heat exchangers and heating coils.

Pressure gauges at each side of pumps shall be attached to the piping and not to the pump flanges. All pressure gauges shall be provided with isolation valves. Pressure gauges on glycol lines shall be provided with pin type pulsation snubbers.

3. The Contractor shall enlist the services of an established water treatment company, with three years documented history, to monitor the flushing, chemical cleaning and filling of all glycol water systems. The water treatment company representative shall sample and test glycol and water systems at initial start-up and provide necessary inhibitors and water treatment to insure conformance with glycol manufacturers’ recommendation. The water treatment company shall analyze samples of glycol solution monthly for a 1-year period, beginning the month of Final Inspection. The water treatment company shall provide and install all necessary chemicals, glycol inhibitors, etc. as required to maintain system during this initial 1-year testing period. Each month during the 1-year test period the contractor shall submit copies of monthly tests performed, test results, and a description of all chemical additions and treatment to the Contracting Officer.

4. Provide optical hygrometer to Contracting Officer, for testing glycol concentrations.

5. After flushing and draining hydronic piping systems, circulate for a period of 6 hours a solution heated to 195 degrees Fof 2.2 lbs of tri-sodium phosphate for each 130 gallons of water in system. Upon completion, completely drain systems at all low points.

Remove, clean, and replace strainer baskets. After all strainers have been cleaned and replaced, flush the entire system with fresh water. During the fresh water flush, open and close each valve in the system several times and continuously drain water from all low point drains. Flushing shall be continued until all residue of cleaning solution has been removed from all equipment, pipe segments, bypass lines, etc. After flushing is complete, fill glycol systems with factory pre-mixed propylene glycol solution with corrosion inhibitors.

6. Provide glycol systems with a make-up system with glycol storage tank, manually…