bafbrwhq15486.pdf

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

06/09/09 15486-1 BUCKLEY AFB

SECTION 15486 - FUEL-FIRED WATER HEATERS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section includes the following fuel-fired water heaters:

1. Commercial, power-burner, storage, gas water heaters.

2. Water heater accessories.

1.02 REFERENCES:

A. Applicable Standards:

1. American National Standards Institute (ANSI):

a. Z21.12 - Draft Hoods.

b. Z21.13 - Gas-Fired Low-Pressure Steam and Hot Water Boilers.

c. Z21.18 - Gas Appliance Pressure Regulators.

d. Z21.20 - Automatic Gas Ignition Systems and Components.

e. Z21.21 - Automatic Valves for Gas Appliances.

f. Z21.66 - Automatic Vent Damper Devices for Use with Gas-Fired Appliances.

2. American National Standards Instite/CSA Inernational (ANSI/CSA):

a. Z21.10.1/CSA 4.1 - Gas Water Heaters - Volume I - Storage Water Heaters with

Input Ratings of 75,000 Btu per Hour or Less.

b. Z21.10.3/CSA 4.3 - Gas Water Heaters - Volume III - Storage Water Heaters with

Input Ratings above 75,000 Btu per Hour, Circulating and Instantaneous Water Heaters.

c. Z21.15/CSA 9.1 - Manually Operated Gas Valves for Appliances, Appliance connector Valves, and Hose End Valves.

d. Z21.22/CSA 4.4 - Relief Valves for Hot Water Supply Systems.

3. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE):

a. 90.2 - Energy Efficient Design of New Low-Rise Residential Buildings.

4. American Society of Heating, Refrigerating and Air-Conditioning Engineers/Illuminating

Engineering Society of North America (ASHRAE/IESNA):

a. 90.1 - Energy Standard for Buildings except Low-Rise Residential Buildings.

5. American Society of Sanitary Engineering (ASSE):

a. 1005 - Water Heater Drain Valves.

6. ASME International (ASME):

a. B1.20.1 - Pipe Threads, General Purpose (Inch).

b. B16.5 - Pipe Flanges and Flanged Fittings.

c. B16.24 - Cast Copper Alloy Pipe Flanges, Class 150, 300, 400, 600, 900, 1500, and

2500, and Flanged Fittings, Class 150 and 300.

d. PTC 25.3 - Pressure Relief Devices.

e. 2001 ASME Boiler and Pressure Vessel Code - Section IV, "Heating Boilers;"

Section VIII, "Pressure Vessels;" Division 1.

7. Hydraulic Institute (HI):

a. 1.1-1.2 - Centrifugal Pumps for Nomenclature and Definitions (ANSI).

b. 1.3 - Centrifugal Pumps for Design and Applications (ANSI).

8. CSA International (IAS):

a. No. 2 - Water Heater Stands and Drain Pans.

9. The International Association of Plumbing and Mechanical Officials (IAPMO):

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

BUCKLEY AFB 15486-2 06/09/09

a. PS 103 - Water Heater Stands With or Without Pans.

10. NFPA Inernational (NFPA):

a. 31 - Installation of Oil-Burning Equipment.

b. 54 - National Fuel Gas Code.

c. 70 - National Electrical Code.

11. NSF International (NSF):

a. 5 - Water Heaters, Hot Water Supply Boilers, and Heat Recovery Equipment.

b. 61 - Drinking Water System Components - Health Effects; Sections 1 through 9.

12. Underwriters Laboratories Inc. (UL):

a. 778 - Motor Operated Water Pumps.

b. 795 - Commercial-Industrial Gas-Heating Equipment.

1.03 SUBMITTALS:

A. General: Submit the following as specified in SECTION 15050 - BASIC MECHANICAL

MATERIALS AND METHODS.

B. Product Data: For each type and size of water heater indicated. Include rated capacities, operating characteristics, furnished specialties, and accessories.

C. Source quality-control test reports.

D. Field quality-control test reports.

E. Operation and Maintenance Data: For water heaters to include in emergency, operation, and maintenance manuals.

F. Warranty: Special warranty specified in this Section.

1.04 QUALITY ASSURANCE:

A. Source Limitations: Obtain same type of water heaters through one source from a single manufacturer.

B. Product Options: Drawings indicate size, profiles, and dimensional requirements of water heaters and are based on the specific system indicated. Refer to DIVISION 1.

C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

D. ASME Compliance:

1. Where ASME-code construction is indicated, fabricate and label commercial water heater storage tanks to comply with ASME Boiler and Pressure Vessel Code: Section VIII, Division 1.

2. Where ASME-code construction is indicated, fabricate and label commercial, finned-tube water heaters to comply with ASME Boiler and Pressure Vessel Code: Section IV.

E. Comply with NSF 61 for all components that will be in contact with potable water.

1.05 COORDINATION:

A. Coordinate size and location of concrete bases with Architectural and Structural Drawings.

1.06 WARRANTY:

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of fuel-fired water heaters that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including storage tank and supports.

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

06/09/09 15486-3 BUCKLEY AFB

b. Faulty operation of controls.

c. Deterioration of metals, metal finishes, and other materials beyond normal use.

2. Warranty Period(s): From date of Substantial Completion:

a. Commercial, Gas Water Heaters:

(1) Storage Tank: Five years.

(2) Controls and Other Components: Three years.

b. Compression Tanks: One year(s).

PART 2 - PRODUCTS

2.01 MANUFACTURERS:

A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified.

2.02 COMMERCIAL, GAS WATER HEATERS:

A. Commercial, Power-Burner, Storage, Gas Water Heaters: Comply with

ANSI Z21.10.3/CSA 4.3.

1. Manufacturers:

a. Aldrich Company.

b. Bock Water Heaters, Inc.

c. Bradford White Corporation.

d. HESco Industries, Inc.

e. Precision Boilers.

f. PVI Industries, LLC.

g. RECO USA.

h. Sellers Engineering Co.

i. Smith, A. O. Water Products Company.

2. Storage-Tank Construction: ASME-code steel with 150-psig (1035-kPa) working-pressure rating.

a. Tappings: Factory fabricated of materials compatible with tank. Attach tappings to tank before testing.

(1) NPS 2 (DN 50) and Smaller: Threaded ends according to ASME B1.20.1.

(2) NPS 2-1/2 (DN 65) and Larger: Flanged ends according to ASME B16.5 for steel and stainless-steel flanges, and according to ASME B16.24 for copper and copper-alloy flanges.

b. Interior Finish: Comply with NSF 61 barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

c. Lining: Glass complying with NSF 61 barrier materials for potable-water tank linings, including extending lining into and through tank fittings and outlets.

3. Factory-Installed, Storage-Tank Appurtenances:

a. Anode Rod: Replaceable magnesium.

b. Dip Tube: Provide unless cold-water inlet is near bottom of tank.

c. Drain Valve: Corrosion-resistant metal complying with ASSE 1005.

d. Insulation: Comply with ASHRAE/IESNA 90.1. Surround entire storage tank except connections and controls.

e. Jacket: Steel with enameled finish.

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

BUCKLEY AFB 15486-4 06/09/09

f. Combination Temperature and Pressure Relief Valves: ANSI Z21.22/CSA 4.4.

Include one or more relief valves with total relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating. Select one relief valve with sensing element that extends into storage tank.

4. Burner: Comply with UL 795 for power-burner water heaters and for natural-gas fuel.

a. Manufacturers:

(1) Adams Manufacturing Co.

(2) Aero Environmental Ltd.

(3) Carlin Combustion Technology, Inc.

(4) Gordon-Piatt Group; John Zink Company, LLC.

(5) Midco International Inc.

(6) Power Flame, Inc.

(7) Webster Engineering Co., L.L.C.

b. Automatic Ignition: ANSI Z21.20, electric, automatic, gas-ignition system.

5. Temperature Control: Adjustable thermostat.

6. Safety Controls: Automatic, high-temperature-limit and low-water cutoff devices or systems.

7. Special Requirements: NSF 5 construction.

8. Draft Hood: Draft diverter; complying with ANSI Z21.12.

9. Energy Management System Interface: Normally closed dry contacts for enabling and disabling water heater.

2.03 WATER HEATER ACCESSORIES:

A. Gas Shutoff Valves: ANSI Z21.15/CGA 9.1, manually operated. Furnish for installation in piping.

B. Gas Pressure Regulators: ANSI Z21.18, appliance type. Include pressure rating, capacity, and pressure differential required between gas supply and water heater.

C. Gas Automatic Valves: ANSI Z21.21, appliance, electrically operated, on-off automatic valve.

D. Combination Temperature and Pressure Relief Valves: Include relieving capacity at least as great as heat input, and include pressure setting less than water heater working-pressure rating.

Select each relief valve with sensing element that extends into storage tank.

1. Gas Water Heaters: ANSI Z21.22/CSA 4.4.

E. Drain Pans: Corrosion-resistant metal with raised edge. Provide dimensions not less than base of water heater and include drain outlet not less than NPS 3/4 (DN 20).

2.04 SOURCE QUALITY CONTROL:

A. Test and inspect water heater storage tanks, specified to be ASME-code construction, according to ASME Boiler and Pressure Vessel Code.

B. Hydrostatically test commercial water heater storage tanks before shipment to minimum of one and one-half times pressure rating.

C. Prepare test reports.

PART 3 - EXECUTION

3.01 WATER HEATER INSTALLATION:

A. Install commercial water heaters on concrete bases.

1. Exception: Omit concrete bases for commercial water heaters if installation on stand, bracket, suspended platform, or direct on floor is indicated.

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

06/09/09 15486-5 BUCKLEY AFB

2. Concrete base construction requirements are specified in DIVISION 15 Section "Basic Mechanical Materials and Methods."

B. Install water heaters level and plumb, according to layout drawings, original design, and referenced standards. Maintain manufacturer's recommended clearances. Arrange units so controls and devices needing service are accessible.

C. Install gas water heaters according to NFPA 54.

D. Install gas shutoff valves on gas supplies to gas water heaters without shutoff valves.

E. Install gas pressure regulators on gas supplies to gas water heaters without gas pressure regulators if gas pressure regulators are required to reduce gas pressure at burner.

F. Install automatic gas valves on gas supplies to gas water heaters, if required for operation of safety control.

G. Install combination temperature and pressure relief valves in top portion of storage tanks. Use relief valves with sensing elements that extend into tanks. Extend commercial-water-heater, relief-valve outlet, with drain piping same as domestic water piping in continuous downward pitch, and discharge by positive air gap onto closest floor drain.

H. Install water heater drain piping as indirect waste to spill by positive air gap into open drains or over floor drains. Install hose-end drain valves at low points in water piping for water heaters that do not have tank drains. Refer to SECTION 15145 – DOMESTIC WATER PIPING SPECIALTIES for hose-end drain valves.

I. Install thermometer on outlet piping of water heaters. Refer to SECTION 15122 - METERS AND GAUGES for thermometers.

J. Install pressure gauge(s) on inlet and outlet piping of commercial, fuel-fired water heater piping. Refer to SECTION 15122 - METERS AND GAUGES for pressure gauges.

K. Install piping-type heat traps on inlet and outlet piping of water heater storage tanks without integral or fitting-type heat traps.

L. Fill water heaters with water.

3.02 CONNECTIONS:

A. Piping installation requirements are specified in other DIVISION 15 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

B. Install piping adjacent to water heaters to allow service and maintenance. Arrange piping for easy removal of water heaters.

C. Ground equipment according to DIVISION 16.

D. Connect wiring according to DIVISION 16.

3.03 FIELD QUALITY CONTROL:

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust field-assembled components and equipment installation, including connections, and to assist in field testing. Report results in writing.

B. Perform the following field tests and inspections and prepare test reports:

1. Leak Test: After installation, test for leaks. Repair leaks and retest until no leaks exist.

2. Operational Test: After electrical circuitry has been energized, confirm proper operation.

3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

C. Remove and replace water heaters that do not pass tests and inspections and retest as specified above.

3.04 DEMONSTRATION:

SECTION 15486 REPAIR WING HEADQUARTERS, BLDG 706

FUEL FIRED WATER HEATERS CRWU 06-2071

BUCKLEY AFB 15486-6 06/09/09

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain commercial water heaters. Refer to DIVISION 1.

END OF SECTION 15486