Attachment 8 - MACC Mechanical Sys Standard Requirements.pdf

MACC

Attachment 8

Mechanical systems Standard Requirements June 2020

Introduction:

This Document provides requirements and guidance associated with Mechanical systems work performed on Andrews Air Force Base (JBA) and Joint Base Anacostia- Bolling (JBAB).

General Purpose:

This Document was created for the intent of ensuring quality control and uniformity in design and construction practice and procedures.

MECHANICAL SYSTEMS FOR ALL FACILITIES SHALL COMPLY WITH THE

FOLLOWING:

HVAC System:

1. Design Phase:

A. Design Criteria:

HVAC Design for New, Replacement, Additions, and Renovations of Existing Facilities at JBA and JBAB shall comply with the following codes and standards:

International Building Code (IBC) Including International Mechanical Code (IMC).

ASHRAE/IESNA Standards.

ANSI/SMACNA for duct design and construction guide.

UFC3-400-02 Engineering Weather Data.

UFC3-401-01 Mechanical Engineering.

UFC3-410-01 Heating, Ventilation and Air conditioning Systems.

UFC3-410-02 Direct Digital Control for HVAC and Other Building Control Systems.

UFC3-410-04 Industrial Ventilation.

UFC3-430-01FA Heating and Cooling Distribution Systems.

OSHA standards.

Associated Air Balance Council (AABC) National Air Balance Council (AABC) National Environmental Balancing Bureau (NEBB) Manufacturers Standardization Society of Vakve and Fittings (MSS) American National Standards Institute (ANSI) National Fire Protection (NFPA)

Attachment 8

Mechanical Guidelines

B. Outdoor Design Conditions:

Outdoor design conditions for Joint Base Andrews Shall be as follows:

Summer Design: 94.0 F DB /75.0 F WB. 0.4% Occurrence.

Outside Air Humidity Ratio (HR): 102 gr/Lb.

Mean Coincident 82 F DB.

Outside Winter Design: 18 F.

C. Design Guidelines:

o Air Distribution Sizing, Duct and Louvers design Guidelines:

o Provide low pressure system ductwork and plenums where maximum air velocity is 2000 feet per minute (FPM) and maximum static pressure is 2 inches water gage (wg), positive or negative.

o Low Pressure Duct Sizing (Pressure class 2” WG and less) Supply: Maximum Pressure Drop: 0.1”/100ft Maximum Velocity: 1,600 fpm Return/General Exhaust: Maximum Pressure Drop: 0.1”/100ft Maximum Velocity: 1,600 fpm High Pressure Duct Sizing (Greater than pressure class 2” WG) Supply: Maximum Pressure Drop: 0.15”/100ft Maximum Velocity: 2,000 fpm o Some guidelines to determine maximum airflow velocity to use in selected applications of low velocity systems:

Application Velocity Residences 600 fpm

Theatres, Churches, Auditoriums 800 fpm Apartments, Hotel rooms 1000 fpm

Offices, Libraries 1200 fpm Stores, Restaurants, Banks 1500 fpm

Cafeteria 1800 fpm o Commonly accepted duct velocities are indicated in the table below:

Service Velocity

Public Buildings Industrial Buildings fpm fpm

Air intake from outside 500 - 900 1000 - 1200 Heater connection to fan 700 - 900 1000 - 1400

Mechanical Guidelines o D u c t system o Duct systems shall be designed using radius elbows with turning vanes wherever possible.

Branch takeoffs shall be designed with conical fittings or 45-degree entry taps.

o Design and size ductwork systems using latest SMACNA and ASHRAE criteria for velocities and fitting losses. Do not oversize ductwork unnecessarily to avoid performing sound calculations. Duct layouts should be optimized to perform within acceptable criteria at the lowest reasonable installed cost. The use of underground ducts for general comfort conditioning is prohibited, except for sub slab soil exhaust systems which are allowed.

o Flexible duct is preferred at connections from branch to supply diffusers and grilles when possible in design. Maximum length of flexible duct shall not exceed 5 feet. Do not use flexible duct for offsets greater than 45 degrees or connections to diffusers registers or grilles greater than 45 degrees.

o Manual balance dampers shall be shown at each major branch takeoff and at run outs to diffusers and grilles of supply, return, and exhaust ductwork. Locate balance dampers back from diffusers and grilles as far as possible to reduce damper generated noise. Avoid the use of registers in grilles wherever possible.

o Provide manual volume dampers for all main and branch ducts; these should include all supply, return, and exhaust ducts. Do not use splitter dampers or air extractors for air balancing. Provide opposed blade manual balancing damper for outside air. Indicate opposed blade manual balancing dampers for both the main supply and return duct and the main relief duct on all return air fans; dampers must be in close proximity to the automatic return and relief dampers.

o Transfer ducts shall be sized for a duct velocity of 300 to 500 fpm.

o Outside air intake louvers and intake hoods shall be installed so that the bottom of the intake is a minimum of 30” above the finished roof level, grade, or bottom of areaway. For buildings adjacent to public roadways, locate intake louvers above the first-floor level, on the roof, away from the roadways to prevent contamination of the air whenever possible.

Main supply ducts 1000 - 1500 1200 - 2400 Branch supply ducts 500 - 600 900 - 1800

Supply registers and grilles 250 - 450 350 - 500 Low level supply registers 150 - 250 -

Main extract ducts 900 - 1500 1200 - 2400 Branch extract ducts 500 - 600 900 - 1800

Mechanical Guidelines o Arrange intake louvers and associated duct connections to get even air velocities across entire louver area. Design louvers for the following maximum velocities across louvers’ free area: 400 fpm for intake louvers on systems with over 75% minimum outside air. 500 fpm for intake louvers on constant volume systems with outside air economizer. 500 fpm for intake louvers on variable air volume systems with outside air economizer.

o For Variable air volume; do not oversize the system. Do not add safety factors in the load calculations. Size all central air handling equipment and central plant equipment for “block” loads. Design for both peak and part load UFC 3-410-01 1 conditions (minimal wall transmission load, low occupancy, etc.). Submit part load design calculations. Verify proper fan operating characteristics throughout the range from the minimum to the maximum flow conditions that will be experienced.

o VRF Systems: VRF are not permitted unless it is specifically requested by JBA or when no other suitable option is available and approved by JBA PM. Since systems from different manufacturers require different mechanical designs, provide a design with necessary design allowances to permit multiple manufacturers to meet the design. For example, piping designs differ between VRF manufacturers so do not require specific VRF piping design, but rather indicate where piping may be installed.

o Design requirements for VRF system:

1. VRF systems must meet the control system specifications.

2. Provide a stand-by outdoor unit when VRF system is utilized.

3. The design must not preclude competition between vendors: a. Since VRF systems from different manufacturers require different mechanical designs, provide a design with necessary design allowances to permit multiple manufacturers to meet the design. For example, piping designs differ between VRF manufacturers so do not require specific VRF piping design, but rather indicate where piping may be installed. b. Edit project specifications and requirements to include contractor design drawings as additional pre-construction drawing SD-02 Shop Drawing submittals. These drawings must document the details of the VRF design, including but not limited to piping layout.

4. Designs must require that the system be configured and installed strictly in accordance with the manufacturer’s installation requirement.

5. Include and require refrigerant line vibration isolation at all connections to motorized equipment, including but not limited to the refrigerant line connections at each fan coil unit.

6. VRF systems piping/tubing must have all brazed connections that meet ASME B31.5 requirements and the manufacturer’s installation requirements. The list of fittings and joints that are prohibited include but are not limited to the following: push-on fittings, extruded fittings, flare fittings, press-connect fittings, mechanical joints and groove joints. The VRF system must be pressure tested and vacuum tested.

7. VRF systems must be provided to meet ASHRAE 15 and IMC safety requirements pertaining to leakage to rooms and spaces. Calculations must be performed per IAW ASHRAE 15 and IMC and must be provided to demonstrate these requirements are met.

Mechanical Guidelines

8. The total refrigerant charge of the independent VRF system must be 49-lbs or less. (See APPENDIX B for more information on EPA regulation and refrigerant leakage concerns.)

o For systems using a dedicated outdoor air handler for ventilation air directly connected to a VAV air handler, provide controls to ensure ventilation air requirements are maintained over all load conditions.

o In all new design/ construction projects HVAC control system shall be tied into JBA management system EMCS.

o Chilled and Heating Hot Water Pipe Sizing Guidelines:

Pipe Sizing shall be based on maximum pressure drop of 4 ft/100 ft, and a maximum velocity of 10 fps for piping up to 14” diameter, and a maximum velocity of 12.5 fps for piping 16” diameter and larger.

All pipe sizes shall be designed in accordance with the latest version of ASHRAE Standard 90.1 entitled “Energy Standard for Buildings Except Low-Rise Residential Buildings” and applicable Building Code requirements.

o Equipment selection:

Equipment sizing and selection shall comply with the following:

o Sizing shall take into consideration a safety factor for load calculations.

o A possibility of future expansion.

o The capability of the equipment to operate at part load.

o The possibility of utilizing emergency power.

o The possibility for equipment redundancy.

o Dimension and weight of the equipment especially for renovated projects.

o Maintenance clearance required.

o For renovation projects equipment maintenance shall be identified whether it will be maintained under an existing maintenance or shall have a new contract.

o Temporary and Semi-Permanent Facilities:

I. Definition

Mechanical Guidelines

Temporary Facility: Buildings and facilities designed and constructed to serve a life expectancy of five years or less using low-cost construction. A minimal facility intended to increase efficiency of operations and moderately improve quality of life for occupants.

Maintainability is a secondary consideration. Construction features are characterized by low cost, expedient, construction utilizing locally available materials and construction methods and equipment. Temporary construction typically cannot be economically converted to a higher construction level.

Semi-Permanent Facility: Buildings and facilities designed and constructed to serve a life expectancy of less than 10 years. With maintenance and upkeep of critical building systems, life expectancy of facility can be extended to 25 years. Expediency of construction and material UFC 1-201-01 1 January 2013 7 availability may be a factor.

Facilities are intended for a more enduring presence with operational characteristics and functional performance similar to permanent construction.

II. Requirements Temporary and Semi-Permanent Facility: Provide interior spaces intended for occupancy with ventilation by natural or mechanical means in accordance with the International Mechanical Code (IMC), Chapter 4, “Ventilation”. Recommend interior spaces intended for occupancy be provided with active or passive air-conditioning systems capable of maintaining the spaces at an ASHRAE effective maximum temperature of 93 degrees Fahrenheit (33.9 deg. C), and effective minimum temperature of 60 degrees Fahrenheit (15.5 deg. C).

Install Ventilation and Environmental Control Systems in accordance with manufacturer’s instructions and Service Technical Manuals for pre-packaged systems.

D. Specifications:

Material and equipment make shall comply with the following:

Materials, equipment and systems shall be selected within the criteria and the specifications that are shown in an illustrative, performance-based format and are not intended to constitute endorsement of any specific product or manufacturer unless mentioned otherwise. List of preferred Manufacturers are shown for each equipment in the order of preference by JBA to meet maintenance and operation requirements.

o Ductwork:

Galvanized steel ductwork material shall be provided for new and renovated constructions. Fiber or gypsum board ducts are prohibited per UFC 3-410-01.

Minimum Sheet Metal Thickness

Mechanical Guidelines

Duct width inches Gage 0-12 26

13-30 24 31-60 22 o Fire Dampers:

Provide high velocity Fire dampers in accordance with ASHRAE and SMACNA.

o Volume Dampers:

Provide low pressure drop high velocity manual volume damper for both supply and return ducts as per UFC.

1. Install manually operated opposed blade or single blade volume/balancing dampers on all main and branch duct takeoff from the main duct to control the amount of air entering or leaving the branch.

2. Do not use register or diffuser mounted dampers for volume control.

3. Blades shall be 16 gauge minimum.

o Louvers:

1. All louvers should be stationary blade type constructed of extruded aluminum and have integral exterior bird screen.

2. Intake louvers need to be “drainable” with a gutter at the lip of each blade to prevent water from running down the face of the louver.

Manufacturers (volume dampers, roof hoods and louvers):

1. Greenheck

2. Nailor

3. Ruskin

4. Portorff

5. American Warming & Ventilating

6. NCA 7. Approved Equal

7. Arrow

8. Cook

9. Acme

10. Or approved equal

Mechanical Guidelines o Air Outlets and Inlets

A. General:

1. Base selection on air flow, noise criterion (NC) level, air pattern, throw, mounting height, face velocity, pressure loss, and aesthetic requirements. Space NC levels should be based on guidelines established in Chapter 48 of ASHRAE 2011 Handbook – HVAC Applications or latest equivalent.

2. Provide an integral opposed-blade damper only when a manual-balancing damper cannot be installed in the branch duct.

3. In renovations, give consideration to matching existing diffuser and registers in adjacent areas.

4. In typical suspended ceiling installations, it is preferred to use 24" X 24” square cone, 3 tiered diffusers similar to Price SCD series diffusers.

B. Acceptable Manufacturers:

1. Price

2. Titus

3. Anemostat

4. Metalaire

5. Krueger

6. Nailor Industries

7. Or approved equal o Fans:

A. General:

1. Utility set and plenum type centrifugal fans are preferred for most applications. Preferred method of regulating fan output is via VFD.

2. Floor-mounted fans are strongly preferred. In-line centrifugal fans will be allowed on renovation projects where lack of floor space is a factor, provided the fans are accessible for maintenance. Provide easy access for inspection, cleaning, service and removal of internal fan components for all in-line fans.

3. Locate fume hood exhaust exterior to the envelope building if possible in lieu of filtered recirculating type hoods.

4. Chemical resistance is required for exhaust fans in corrosive areas, such as laboratory fume hood exhaust.

5. Exhaust fans shall be located to avoid exhaust air re-entrainment and recirculation into intake louvers.

6. Fans shall be dynamically and statically balanced to prevent vibration.

7. Provide spring type isolators sized to match the weight of each individual fan.

8. Provide flexible connectors on inlet and discharge side of fans.

Mechanical Guidelines

9. Roof mounted fans are permitted to be used when location indoors is not practical or for special applications such as fume hood exhaust.

a. Roof mounted fans shall be provided with manufacturers insulated roof curb.

b. The corners are to be welded continuously to form a one piece, leak-proof shell. The bottom of the curb is to have a base plate which encloses the lower edge of the insulation.

c. Where power to the roof is routed through the fan curb, wiring shall be in conduit, installed in such a manner that it does not interfere with the operation of the motorized damper. Conduit shall be routed adjacent to the active portion of the damper and shall be secured to the inside wall of the curb.

d. All fans shall have motorized damper in the inlet neck to positively seal when fan is de-energized.

B. Acceptable Manufacturers:

1. Greenheck

2. Loren Cook

3. Twin City

4. New York Blower

5. Penn-Barry

6. Or approved equal o Outdoor makeup air handler:

1. Trane

2. York

3. Diakin

4. Nortek Air solutions

5. Johnson Controls

6. AC corporation

7. Stulz

8. AAON

9. Carrier

10. Or approved equal o Rooftop unit (outdoor Air handling unit):

1. Trane

2. Daikin

3. York

4. Lennox

Mechanical Guidelines

5. Carrier

6. Or approved equal o Air handling unit:

Custom AHU

1. Carrier

2. York

3. Daikin

4. Nortek Air solutions

5. Johnson Controls

6. AC corporation

7. Stulz

8. Or approved equal

Standard AHU

1. Trane

2. York

3. Daikin

4. Nortek Air solutions

5. Johnson Controls

6. AC corporation

7. Stulz

8. Carrier

9. Or approved equal o DX package unit:

1. Spacepak

2. Geocool

3. Carrier

4. Goodman

5. Daikin

6. Or approved equal o Fan Coil units:

1. Trane

2. Daikin

Mechanical Guidelines

3. Mitsubishi

4. York

5. LG

6. Carrier

7. Or approved equal o Split units:

1. Trane

2. Daikin

3. Mitsubishi

4. York

5. Frigidaire

6. LG

7. Carrier

8. Or approved equal o Dehumidifiers:

1. Honeywell

2. Aprilaire

3. Santa Fe

4. Ultra-Aire

5. Clean Comfort

6. Or approved equal o Electric Heater:

1. Berko

2. Reznor

3. StelPro

4. Omnitec Design Inc.

5. Modine

6. Dayton

7. Markel Products

8. Salamander

9. Omark

10. Or approved equal o Heat Pump:

1. Trane

2. York

3. Diakin

Mechanical Guidelines

4. Carrier

5. Goodman

6. Rheem

7. Or approved equal o Chillers:

Air cooled and water cooled chillers at JBA and JBAB approved manufacturer Trane; No other manufacturer will be accepted without prior JBA or JBAB approval.

o VAV system:

1. Trane

2. Siemens

3. Titus

4. TPI

5. Fantech

6. Nailor industries

7. Dayton

8. Or approved equal o VFD:

A. General:

Variable speed drives on pumps or fans must not be manually adjusted to achieve system balance. Balance systems to deliver design flows with variable speed drives operating at between 55 and 60 Hz so that maximum operational flexibility is maintained. Replace or adjust fan drive sheaves and throttle pump discharges to achieve system balance.

Consider trimming pump impellers on larger systems. Verify pump performance at minimum and maximum operating points.

B. Acceptable manufacturers

1. Fuji electric

2. Vevor

3. GE industrial

4. Teco Westinghouse

5. ABB industrial systems

6. Or approved equal o Recirculating chiller pump:

Mechanical Guidelines

1. Berkley

2. Armstrong

3. Grundfos

4. Taco

5. Little Giant

6. Goulds

7. Zoeller

8. Honda

9. Or approved equal o Condensate pumping unit:

1. Little Giant

2. Hartell

3. Dayton

4. Roth pump

5. Beckett pumps

6. Or approved equal o Thermostat:

Thermostat control system JBA and JBAB approved manufacturer Siemens; No other manufacturer will be accepted without prior JBA or JBAB approval.

o Air Terminals:

A. General:

1. Each office shall have its own terminal unit for space temperature control unless approved by JBA.

2. Air Terminal units shall be located where accessible and serviceable above corridor ceilings where possible. Access doors shall be provided where terminal units are located above hard ceilings.

B. Acceptable Manufacturers:

1. Price Industries

2. Titus

3. Trane

4. Metalaire

5. Tuttle & Bailey

6. Or approved equal

Mechanical Guidelines o Piping Accessories:

1. Calibrated Balancing Valves and Calibrated Metering Stations (auto-flow valves are preferred. See 4. Below):

a. Armstrong Pumps, Inc.

b. Flow Design, Inc.

c. Griswold Controls.

d. ITT Bell & Gossett; ITT Fluid Technology Corp.

e. Nexus.

f. Taco, Inc.

g. Or approved equal

2. Pressure-Reducing Valves:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. Conbraco Industries, Inc.

d. ITT Bell & Gossett; ITT Fluid Technology Corp.

e. Spence Engineering Company, Inc.

f. Taco, Inc.

g. Watts Industries, Inc.; Watts Regulators

h. Zurn Industries, Inc. Wilkins Division

i. Or approved equal

3. Safety Valves:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. Conbraco Industries, Inc.

d. ITT McDonnell & Miller Div.; ITT Fluid Technology Corp.

e. Kunkle Valve Division.

f. Spence Engineering Company, Inc.

g. Or approved equal

4. Automatic Flow-Control Valves (Preferred):

a. Flow Design, Inc.

b. Griswold Controls.

c. ITT Bell and Gossett; ITT Fluid Technology Corp.

d. Nexus

e. Or approved equal

Mechanical Guidelines

5. Expansion Tanks:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. ITT Bell & Gossett; ITT Fluid Technology Corp.

d. Taco, Inc.

e. Wessels

f. Or approved equal

6. Air Separators:

a. Amtrol, Inc.

b. Armstrong Pumps, Inc.

c. ITT Bell & Gossett; ITT Fluid Technology Corp.

d. Taco, Inc.

e. Spirotherm, Inc.

f. Or approved equal

7. Other Hydronic Accessories (air vents, etc.)

a. Amtrol

b. Armstrong Pumps, Inc.

c. ITT Bell and Gossett; ITT Fluid Technology Corporation.

d. Metraflex

e. Mueller

h. Spirotherm

i. Taco

j. Watts

k. Or approved equal

8. Flexible Connectors:

a. Flex – Hose Company

b. Hyspan

c. Metraflex

d. Unasphere

e. Vibration Eliminator

f. Or approved equal

9. Strainers:

a. Armstrong

b. Flexonics

c. Keckley

d. Metraflex

Mechanical Guidelines

e. Mueller

f. Watts

g. Or approved equal

D. In-Line and Base Mounted Pumps Approved Manufacturers

1. Ball & Gossett

2. Taco, Inc

3. Thrush

4. Or approved equal o Heat Exchangers for HVAC

A. Shell and Tube Heat Exchangers

1. ITT/ Bell & Gossett

2. TACO

3. Thrush

4. Armstrong

5. Or approved equal

B. Gasketed-Plate Heat Exchangers Frame shall have the capacity to accommodate 20% additional plates.

Manufacturers:

a. Alfa Laval Inc.

b. APV

c. ITT/ B&G

d. TACO

e. Armstrong

f. f. API

g. Or approved equal

E. Plans:

Mechanical Plans shall identify all required volume dampers, smoke dampers, smoke detectors and fire dampers as per the codes mentioned above and shall provide details for installation.

For all facilities at Joint base Andrews smoke detectors shall be installed in return air system with the design capacity of 2000cfm and more, in the return duct. Unless building is being protected by area smoke detectors connected to fire alarm.

Mechanical Guidelines

Plumbing System:

1. Design Phase:

A. Design Criteria:

Plumbing Design for New, Replacement, Additions, and Renovations of Existing Facilities at Joint Base Andrews shall comply with the following codes and standards:

• International Building Code (IBC) Including International Plumbing Code (IPC).

• UFC3-420-01 Plumbing Systems.

• UFC3-430-02FA Central Steam Boiler Plants.

B. Design guidelines:

Water System o For Temporary Buildings: All potable water (drinking water) facilities and systems must be designed and operated to ensure protection of health and safety. Requirements for systems may be addressed in COCOM or coalition guidance or international agreements.

Water storage and distribution for Air Force must comply with AFH 10-222, Volume 2, Chapter 3, Water Distribution and Sanitation Systems.

o Hot water distribution pipe and tubing shall have a pressure rating of not less than 100psi at 180F.

o Full open valves shall be installed in the following locations:

1. On the building water service pipe from the public supply near the curb.

2. On the water distribution supply pipe at the entrance into the structure.

3. On the discharge side of every water meter.

4. On the base of every water riser pipe in occupancies other than multiple-family residential occupancies that are two stories or less in height.

5. On the top of every water down-feed pipe in occupancies other than one and two family residential occupancies.

6. On the entrance to every water supply pipe to dwelling unit, except where supplying a single fixture equipped with individual stops.

7. On the supply pipe to gravity or pressurized water tank.

8. On the water supply pipe to every water heater.

Mechanical Guidelines o Locations of shut-off valves:

1. On the fixture supply to each plumbing fixture other than bathtubs and showers in individual sleeping units that are provided with unit shut-off valves in boarding houses and hotels.

2. On the water supply to each sillcock

3. On the water supply pipe to each appliance or mechanical equipment.

o Fixtures shall be provided (both male and female) at the following rates per UFC:

1. Water closets (1 per 20 persons, up to 100 people; then 1 per 40 persons).

2. Lavatories (1 per 20 persons, up to 100 people; then 1 per 45persons).

3. Lavatories (1 per 5 persons) Showers “For “High hazard” occupancies involving exposure to skin contamination with poisonous, infectious, or irritating materials.

4. Showers “For “High hazard” occupancies involving exposure to skin contamination with poisonous, infectious, or irritating materials “(1 per 15 persons)– Assembly, Occupancy for Coliseums, arenas, skating rinks, pools, etc, add new line of Locker rooms (for athletes, not spectators).

5. Drinking fountains (1 per 75 persons).

6. Service sinks (1 per floor).

o Minimum sizes of fixture water supply pipe:

Fixture Minimum pipe size

(inch) Combination sink and tray 1/2

Dishwasher domestic 1/2 Drinking fountain 3/8

Hose bib 1/2 Kitchen Sink 1/2

Laundry compartments 1/2 Lavatory 3/8

Shower, Single head 1/2 Sink, Flushing rim 3/4

Sink, Service 1/2 Urinal, Flush Tank 1/2

Urinal, Flushometer valve 3/4 Wall hydrant 1/2

Water closet, Flush tank 3/8 Water closet, Flushometer tank 3/8

Mechanical Guidelines

Water closet, Flushometer valve 1 o Water service temperatures for Air Force facilities

Service Degree (F) General use such as showers, sinks, family housing, administration facilities, etc

Commercial type dishwashers with internal boosters

Commercial type dishwashers without internal boosters

Commercial type laundries

Sanitary Drainage System o Slope of Horizontal drainage pipes shall be as follows:

Size (inches)

Minimum Slope (inch per foot)

2 ½ or less 1/4 3 to 6 1/8

8 or larger 1/16 Exception: Slope of drainage piping upstream of grease interceptor shall not be less than ¼ inch per foot (2% slope) o The size of drainage pipes shall not be reduced in the direction of the flow o Sump Pumps with discharge capacities in excess of 25 gallons per minute and with a total head of at least 20 feet shall be of the duplex type.

o Drainage piping for future fixtures shall terminate with approved cap or plug.

Mechanical Guidelines o Horizontal drainage pipes shall have cleanouts that is located at intervals of not more than 100 ft .Building drains shall have cleanouts that is located at intervals of not more than 100 ft except where manholes are used instead of cleanouts.

o A cleanout shall be provided for horizontal pipes at each change of direction greater than 45 degrees.

o A stack with a horizontal offset located more than four branch intervals below the top of the stack shall be vented.

o Drainage fixture units and minimum size traps shall be as follows:

Fixture Fixture unit Minimum size of trap

(Inches) Combination sink and tray 2 1 1/2

Dishwasher domestic 2 1 1/2 Drinking fountain 1/2 1 1/4

Kitchen Sink 2 1 1/2 Laundry compartments 2 1 1/2

Lavatory 1 1 1/4 Sink, Service 2 1 1/2

Urinal 4 Consistent with fixture outlet size Urinal, 1 gal per flush maximum

Consistent with fixture outlet size

Urinal, non-water supplied 1/2 Consistent with fixture outlet size Water closet, Flushometer tank public or private

Consistent with fixture outlet size

Water closet, private = 1.6 gallon per flushing cycle

Consistent with fixture outlet size Water closet, public = 1.6 gallon per flushing cycle

Consistent with fixture outlet size Water closet, private > 1.6 gallon per flushing cycle

Consistent with fixture outlet size Water closet, public> 1.6 gallon per flushing cycle

Consistent with fixture outlet size Dental lavatory 1 1 1/4

Dental unit/cuspidor 1 1 1/4 Emergency floor drain 0 2

For Floor drain and floor sink refer to IPC chapter 7

Mechanical Guidelines

C. Specifications:

Materials, equipment and systems shall be selected within the criteria and the specifications that are shown in an illustrative, performance-based format and are not intended to constitute endorsement of any specific product or manufacturer unless mentioned otherwise. List of preferred Manufacturers are shown for each equipment in the order of preference to meet operation and maintenance requirements.

o Pipework:

o Permanent Building/Drainage pipes:

Provide Cast iron drainage pipes.

o Temporary Buildings/Drainage pipes:

Follow UFC 3-420-01, Section titled “Piping Arrangement.” Piping is not required to be concealed or painted.

o Permanent Building/Domestic water pipes:

Provide copper type L water pipes o Temporary Buildings/Domestic water pipes:

Follow UFC 3-420-01, Section titled “Piping Arrangement.” Piping is not required to be concealed or painted.

o Electric water heater:

1. Rheem-ruud

2. Eemax

3. American Standard

4. A.O.Smith

5. Bradforf White

6. Ecosmart

7. Reliance

8. Or approved equal o Boiler: (Natural gas, Propane, Fuel oil )

1. Weil-Mclain

2. Rheem

3. Williamson

4. Or approved equal o Natural Gas water heater:

1. Rheem

Mechanical Guidelines

2. American Standard

3. Renzor

4. Modine

5. A.O.Smith

6. Or approved equal o Water Pump:

1. Berkley

2. Grundfos

3. Little Giant

4. Goulds

5. Zoeller

6. Honda

7. Or approved equal o Hot water recirculating Pump:

1. Berkley

2. Armstrong

3. Grundfos

4. Taco

5. Little Giant

6. Goulds

7. Zoeller

8. Honda

9. Or approved equal o Lift Station and Sump Pump:

1. Wayne

2. Zoeller

3. Everbilt

4. Modine

5. AMT

6. Little Giant

7. Red Lion

8. Liberty Pumps

9. Or approved equal o Floor Clean out:

Provide floor clean out on horizontal line every 100 ft and at every change in direction.

Mechanical Guidelines

Acceptable Manufacturers:

a. Josam Company; Josam Div.

b. MIFAB, Inc.

c. Smith, Jay R. Mfg. Co.; Division of Smith Industries, Inc.

d. Tyler Pipe; Wade Div.

e. Zurn Plumbing Products Group; Specification Drainage Operation.

f. Watts Manufacturing

g. Or approved equal o Floor Drain:

Acceptable Manufacturers:

h. Josam Company; Josam Div.

i. MIFAB, Inc.

j. Smith, Jay R. Mfg. Co.; Division of Smith Industries, Inc.

k. Tyler Pipe; Wade Div.

l. Zurn Plumbing Products Group; Specification Drainage Operation.

m. Watts Manufacturing

n. Or approved equal o Backflow Preventer:

a. Shall be of the reduced pressure zone (RPZ) type.

b. The assembly shall include shutoff valves on inlet and outlet, and strainer on inlet.

c. Backflow preventers shall include test cocks, and pressure-differential relief valve located between 2 positive seating check valves.

d. Provide backflow preventers at any connection between potable and non-potable water systems.

e. Watts Manufacturing

f. Or approved equal o Submersible Sump Pump

a. ITT

b. Pentair Pump Group/Hydromatic Pumps

c. Zoeller Company

d. ABS Pumps

e. Or approved equal

Mechanical Guidelines o Quick-Disconnect-System Submersible Sewage Pump

a. ABS Pumps

b. Aurora/Hydromatic Pumps

c. ITT

d. Zoeller

e. Or approved equal o Domestic Water Pumps and Booster Pump Package

Recirculating Inline Pumps

a. B&G / IT

b. Grundfos

c. Taco

d. Pentair

e. Or approved equal

Packaged Domestic Booster Pumps

a. B&G / IT

b. Grundfos

c. Taco

d. Pentair

e. Or approved equal o Balancing Valves

a. Calilbrated Type

1. Amtrol

2. B & G

3. Nibco

4. Armstrong

5. Or approved equal

b. Memory Stop Type

1. Conbraco

2. Crane

Mechanical Guidelines

3. Grinnell

4. Nibco

5. Or approved equal o Automatic Flow Control Valves

a. Flow Design

b. Griswold

c. Nexus

d. Or approved equal o Thermostatic Mixing Valves

a. Symmons

b. Lawler

c. Bradley

d. Or approved equal o Hose Bibbs/Hydrants

a. Interior hose bibs shall have an integral vacuum breaker.

b. Exterior hose bibs shall be "freeze proof" with drain down to the exterior of the building and shall have an integral vacuum breaker.

c. Andrews AFB approves and uses several manufacturers for floor drains and cleanouts including, but not necessarily limited to the following:

1. Woodford

2. Smith, Jay R. Mfg. Co.

3. Josam Company

4. Zurn Industries, LLC

5. Or approved equal

Mechanical Guidelines

Definitions:

o HVAC Heating Ventilation and Air Conditioning o ASHRAE American Society of Heating, Refrigerating and Air

Conditioning Engineers o ANSI American National Standards Institute o IBC International Building Code o IMC International Mechanical Code o SMACNA Sheet Metal and Air Conditioning Contractors’ National

Association o IESNA Illuminating Engineering Society of North America o UFC Unified Facilities Criteria o OSHA Occupational Safety and Health Administration o DB Dry Bulb o WB Wet Bulb o HR Humidity Ratio o gr/Lb Grams per Pound o F Fahrenheit o FPM Feet per Minute o Fps Feet per Second o Wg Water Gauge o Ft Foot o CFM Cubic Feet per Minute o VFD Variable Frequency Drive o NC Noise Criteria o SCD Suspended Ceiling Diffuser o IPC International Plumbing Code o AHU Air Handling Unit o COCOM Combatant Command