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CECIL COUNTY PUBLIC SCHOOLS

DEPARTMENT OF BUSINESS SERVICES

GEORGE WASHINGTON CARVER EDUCATION LEADERSHIP CENTER 201 BOOTH STREET • ELKTON, MD 21921

phone: 410.996.5429 • fax: 410.996.5137 • www.ccps.org

D’Ette W. Devine, Ed.D. Dawn K. Branch Superintendent of Schools President, Board of Education

Our Mission: to provide an excellent pre-kindergarten through graduation learning experience that enables ALL students to demonstrate

the skills, knowledge, and attitudes required for lifelong learning and productive citizenship in an ever-changing global society.

ADDENDUM #1

BID #18-08: Rising Sun Elementary School

Boiler Replacement Project Replacement

January 26, 2018

To the contract drawings and specifications for the referenced project, dated January 25, 2018, as

prepared by Alban Engineering, Inc., 303 International Circle Ste. 450 Hunt Valley, MD 21030.

This Addendum includes changes and clarifications to the Contract Documents. The information includes

the following:

SPECIFICATION ITEMS:

ITEM NO. 1.1 SECTION 15600- Heating, Ventilating, and Air Conditioning

REPLACE Replace entire section with attached.

CCPS #18-08 Rising Sun Elementary School- Boiler Replacement Project (Addendum#1)

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SECTION 15 600 - HEATING, VENTILATING, AND AIR CONDITIONING

PART 1 - SUMMARY

1.1 GENERAL:

A. The Conditions of the Contract and other General Requirements apply to the work specified in

this section. All work under this section shall also be subject to the requirements of Section

15100, "Mechanical General Provisions".

1.2 DESCRIPTION:

A. The work to be performed shall include all labor, materials and equipment necessary to furnish

and install complete, all mechanical equipment as shown on drawings, hereinafter specified or

reasonably implied, and leaving the same in satisfactory operation condition. It is the intent that

systems be installed complete with all items necessary to accomplish this purpose.

PART 2 - PRODUCTS

2.1 PUMPS:

A. General: Provide centrifugal pumps with capacities as indicated on the Drawings. All pumps

shall be laser aligned. Pumps shall be manufactured by Bell and Gossett or Taco.

B. Base-mounted Pumps - End Suction:

1. Furnish and install base-mounted centrifugal end suction pumps to circulate

heating hot water, chilled water and dual temperature water to the various items of

equipment throughout the building, associated with the HVAC system. Pumps

shall have sizes and capacities as indicated on the drawings.

2. All pumps shall be suitable for the service and temperatures designated and shall

conform to the following requirements.

3. Pumps shall be cast iron bronze fitted and shall be suitable for up to 125 psi

working pressure and up to 250-degree F water temperature. Pumps shall have

center-line discharge for positive venting, and flanged bodies. Pumps shall

incorporate a grease lubrication system and be so designed that the bearing

assembly can be removed in one piece. A water slinger shall be provided between

the mechanical seal and bearing areas. Pump shafts shall be steel with an AISI 416

stainless steel sleeve, and be coupled to the motor shaft by a noiseless non-metallic

heavy duty (Woods Dura-Flex or Dodge Paraflex) coupler with OHSA-approved

guard. Impellers shall be one-piece cast bronze, dynamically balanced. Motors

shall be 1750 rpm.


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4. Pumps shall be designed so that they shall not overload at low heads and shall not

develop excessive pressure under throttled flow conditions or overload anywhere

on the operating curve. Operating performance curves shall be submitted for

approval. Provide gauge tappings on each pump flange.

5. Units shall be provided with motors of not less than the horsepower indicated,

suitable for the service and available electrical characteristics. Units shall be

controlled as hereinafter specified. After installation and prior to operation, each

pump shall be laser aligned. Motors shall be as specified hereinbefore and shall

be open drip proof except for motors located outdoors which shall be totally

enclosed air-over (TEAO). For pumps using variable speed drives, the motor shall

be inverter-duty-rated and shall be provided with a shaft grounding ring.

6. Provide Kynar Cyclone Separators.

C. In-Line Circulating Pump:

1. Furnish and install in-line circulating pumps shown on the drawings. Pump and

motor shall be equipped with bearing cartridges for quiet operation. Pumps shall

be suitable for up to 175 psi working pressure and up to 300 degrees F water

temperature as per ASA B16.1. Pump rating curves shall be the result of testing

and rating in accordance with the procedures of the Hydraulic Institute.

2. Pumps shall be non-overloading throughout the range of the curves. Pumps shall

have center-line discharge for positive venting, flanged bodies, and same size

suction and discharge. Pumps shall be provided with permanently lubed

replaceable bearing cartridges. Vent and drain openings at least 3 square inches in

area and a water slinger shall be provided between the mechanical seal and bearing

area. This water slinger shall be integral with shaft sleeve.

3. Pump body shall be cast iron and pump shafts shall be alloy steel with cupro-nickel

sleeve covering all wetted parts, and be close-coupled to the motor shaft. Impellers

shall be one-piece cast bronze, dynamically balanced. Pumps shall have a two-

piece mechanical seal assembly easily replaceable without the use of special tools.

Motors shall be resilient mounted, 1750 RPM, and require no external overload

protection when used with single phase current.

4. Units shall be provided with motors of not less than the horsepower indicated,

suitable for the service and available electrical characteristics. Units shall be

controlled as hereinafter specified. After installation and prior to operation, each

pump shall be aligned. Motors shall be as specified hereinbefore.

5. Impeller diameter shall not exceed 85% of the volute cutwater diameter.

Maximum cataloged impeller size shall be rated to produce at least 110% of the

specified head at specified flow.

6. Pumps shall be Model E-80 Series In-Line Circulators as manufactured by Bell

and Gossett or equal of Taco.


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2.2 NON- CONDENSING BOILER(S)

A. GENERAL

1. Boiler Characteristics (Hot Water)

A. The Hot Water Boiler shall be Cleaver-Brooks Model CB, Fuel Series 100,

40 hp designed for 60 psig. The maximum water temperature will be 200

degree F, and the maximum system temperature drop will be 20 degree F.

B. The boiler shall have a maximum output of 1,339,000 Btu/hr, or 40

horsepower when fired with CS 12-48 #2 oil. Electrical power available will

be 208 Volt 3 Phase 60 Cycle.

2. General Boiler Design

A. The boiler shall be a four pass horizontal fire-tube updraft boiler with five (5)

square feet of heating surface per rated boiler horsepower. It shall be

mounted on a heavy steel frame with integral forced draft burner and burner

controls. The complete package boiler shall be approved as a unit by

Underwriters Laboratories and shall bear the UL/ULC label.

1. The boiler shall be completely preassembled and fire tested at the

factory.

The unit shall be ready for immediate mounting on floor or simple

foundation and ready for attachment of water, steam, fuel, electrical, vent

and blowdown connections.

2. The boiler shall be built to comply with the following insurance and

codes Factory Mutual, ASME CSD-1.

B. Boiler Shell (Hot Water)

1. The boiler shell must be constructed in accordance with ASME Boiler

Code and must receive authorized boiler inspection prior to shipment. A

copy of the inspection report shall be furnished to the purchaser.

2. The hot water return and outlet connections shall be located on the top

center line of the boiler. The boiler shall be designated to rapidly mix the

return water with the boiler water. Forced internal circulation shall be

used.

3. A dip tube shall be included as an integral part of the water outlet.

4. Two lifting eyes shall be located on top of the boiler.

5. Front and rear doors on the boiler shall be hinged or davited. Doors are

to be sealed with fiberglass tadpole gaskets and fastened tightly using

heavy capscrews that thread into replaceable brass nuts.

6. Rear refractory and insulation shall be contained in the formed door,

which must swing open for inspection of brick work.

7. The boiler tubes shall not include turbulators, swirlers or other add-on

appurtenances.

8. Front and rear tube sheets and all flues must be fully accessible for

inspection and cleaning when the doors are swung open. The shell must

be furnished with adequate handholes to facilitate boiler inspection and

cleaning.


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9. The exhaust gas vent shall be located near the front of the boiler on the

top center line and shall be capable of supporting 1000 lbs and shall

contain a stack thermometer

C. Observation ports for the inspection of flame conditions shall be provided at

each end of the boiler.

D. The boiler insulation shall consist of a 2 inch blanket under a sectional

preformed sheet metal lagging. This insulation must be readily removable

and capable of being reinstalled, if required.

E. The entire boiler based frame and other components shall be factory painted

before shipment using a hard finish enamel coating.

3. Hot Water Boiler Trim

A. Low Water Cutoff: A hydro-level 550 low water cutoff control (manual

reset) shall be mounted on the top centerline of the boiler wired into the

burner control circuit to prevent burner operation if boiler water falls below a

safe level.

B. Pressure and Temperature Gauges: Pressure and temperature gauges shall be

mounted on the boiler with temperature sensing element located adjacent to

the hot water outlet.

C. Relief Valves: Water relief valves of a type and size to comply with ASME

Code requirements shall be shipped loose.

D. Temperature Controls: Temperature controls to regulate burner operation

shall be mounted on the unit with temperature sensing elements located

adjacent to the hot water outlet. Controls shall be high limit (manual reset),

operating limit (auto reset), and firing rate control (30-100 hp).

4. Burner and Controls

A. Mode of Operation: Burner operation shall be high-low-off principle. The

burner shall always return to low fire position for ignition.

5. Blower

A. Air for combustion shall be supplied by a forced draft blower mounted in the

front boiler door, above the burner, to eliminate vibration and reduce noise

level.

B. Maximum sound level of the boiler/burner package shall not exceed 79 dbA

(when measured in accordance with ABMA Sound Test Standards).

C. The impeller shall be cast aluminum, radial blade, carefully balanced, and

directly connected to the blower motor shaft.

6. Combustion Air Control

A. Combustion air damper shall be linked to damper motor. Auxiliary

switch on the damper motor shall control high or low firing rate.

7. Fuel Specification and Piping

A. Fuel Series 100 - Light Oil Fired


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1. Burner Type - The burner shall be integral with the front head of the

boiler, and shall be a low pressure air atomizing type approved for

operation with CS12-48, Commercial No. 2 oil.

2. Oil Pilot - The oil pilot shall be air atomizing type with automatic

electric ignition and include oil solenoid valve. An electronic detector

shall monitor the pilot so that the primary oil valve cannot open until

flame has been established.

3. Oil Pump - An oil pump with a capacity of approximately twice the

maximum burning rate shall be included. Select one of the following:

a. 15 hp through 40 hp. The oil pump shall be integral with the burner

and belt driven from the blower motor.

4. Oil Burner Piping - Fuel oil piping on the unit shall include oil

pressure regulating devices, oil metering controls, solenoid shutoff

valves, pressure gauges and fuel strainer, all integrally mounted on the

unit.

5. Low Pressure Air Atomizing

• Belt driven air compressor, lubricating oil tank, oil level indicator,

inlet air filter, air pressure gauge, and low atomizing air pressure

switch.

6. Burner Turndown - Turndown range of the burner shall be 4:1 when

firing No. 2 oil.

• Burner shall operate on the high-low-off principle with a turndown

of 3:1 when firing No. 2 oil.

Boiler Flame Safeguard Controller and Control Panel

1. CB780E Flame Safeguard

2. 4.5.1.1 Boilers with CB780E Control - Each boiler shall be factory

equipped with flame safeguard controller providing technology and

functions equal to the Cleaver-Brooks Model CB780E.

Controller shall be computerized solid state having sequence and flame-

on lights and digital “first out” fault code indications of flame safeguard

trip functions. It shall include dynamic self-check logic. The controller

shall have a fixed operating sequence incapable of being manually

altered. The sequence shall include start, pre-purge, pilot and main fuel

ignition run and post-purge cycles.

Controller shall be the non-recycle type for maximum safety that shall

shutdown the burner and indicate as a minimum the following trip

functions: pilot and main flame failure, high and low fire proving switch

faults, running interlocks open, false flame signal and fuel valve open

(when proof of closure switch is furnished).

The controller shall have a run/test switch. It shall allow interruptions to

sequence just after pre- purge, during pilot ignition trial and run cycles

for adjustments to firing rate motor, damper linkages and pilot flame for

minimum turndown tests.

3. Control Panel: The control panel shall be mounted on the front door of

the boiler in a location convenient to the operator. The hinged metal


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cabinet will have NEMA 1A rating that includes a neoprene dust seal and

a Yale cabinet key type lock.

The panel shall contain the boiler flame safeguard controller, blower

motor starter, indicating lights and selector switches.

The panel shall have a removable sub-base for mounting the flame

safeguard controller, blower motor starter, and terminal blocks.

The panel shall contain the following lights and switches:

a. Lights

• White - load demanded.

• White - fuel valve open.

• Red - low water.

• Red - flame failure.

b. Control Switches

• Burner On-Off.

• Manual-Automatic.

• Manual Firing Rate Control.

• Disconnect Switch

4. Oil, heat and moisture resistant wire shall be used and identified with

circuit numbers corresponding to the electrical wiring diagram.

5. All electrical equipment and wiring shall be in conformance with

Underwriters Laboratories requirements.

6. Boiler to be supplied with a control circuit transformer and fuse

protection for the control circuit.

7. Control Panel: The control panel shall be mounted on the front door of

the boiler in a location convenient to the operator. The hinged metal

cabinet will have NEMA 1A rating that includes a neoprene dust seal and

a Yale cabinet key type lock.

The panel shall contain the boiler flame safeguard controller, indicating

lights and selector switches.

Panel shall have a removable sub-base for mounting the flame safeguard

controller, and terminal blocks. For combination gas-oil and heavy oil

fired boilers the panel will contain the fuel selector and/or oil heater

selector switch.

8. Oil, heat, and moisture resistant wire shall be used and identified with

circuit numbers corresponding to the electrical wiring diagram.

9. All electrical equipment and wiring shall be in conformance with

Underwriters Laboratories requirements.

10. Boiler to be supplied with a control circuit transformer and fuse

protection for the control circuit.

8. Warranty

A. All equipment is to be guaranteed against defects in materials and/or

workmanship for a period of 24 months from date of substantial completion.


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9. Shop Tests

A. The packaged boiler must receive factory tests to check the construction,

controls, and operation of the unit. All tests may be witnessed by the

purchaser, if desired.

B. Start-up Service

1. After boiler installation is completed, the manufacturer shall provide the

services of a field representative for starting the unit and training the

operator at no additional costs.

a. A factory approved and authorized start-up report shall be submitted

to the customer/user at the time of start-up.

2.3 HOT WATER UNIT HEATERS:

A. Furnish and install horizontal delivery, hot water unit heaters as shown on the drawings.

B. Casings - Horizontal Models - Casings shall be formed from 18- or 20-gauge die-formed

steel, and consist of front and back halves. Ribs are formed in top, bottom, and both sides

for added strength. Both halves are joined together at top and bottom, utilizing the

condenser mounting screws for attachment. All corners are rounded with no breaks.

Casing top is provided with threaded hanger connections for unit suspension. Fan venturi

is formed in casing back half.

C. Fans - Fans are aluminum on ALL units and are secured to a steel hub. Each fan is balanced

and designed specifically for unit heater application.

D. Coils - Coils are of the extended-surface type, utilizing aluminum fins and DLP-type

copper tubes with steel supply and return connections. Tubes are mechanically bonded to

collars of the fins. The condensers are warranted for operation at steam or hot water

pressures up to 150 lbs. per sq. in. gauge, and/or temperatures up to 375oF. Fins are

continuous across the width and depth of the condenser.

E. Motor - All motor wiring is terminated in an electrical junction box either supplied with

the unit heater or as an integral part of the motor. Motors shall be totally enclosed 120/60/1

Class "B" insulated, PSC Type. Types 1/25 through 1/8 HP are sleeve bearing. 1/6 through

3/4 HP are ball bearing. All single phase motors have built in overload protection. Provide

disconnects for unit heaters. Sleeve bearing motors can be oiled. Ball bearing motors are

permanently lubricated.

F. Finish - All metal surfaces of the casing are treated to prevent the formation and spread of

rust. Standard models are finished in gray-green baked enamel.

G. Safety Fan Guard - Horizontal units shall be equipped with a combination fan guard/motor-

operated bracket. The guard is constructed of steel rod. Vertical units are supplied with

an outlet fan guard covering the opening in the bottom of the unit.

H. Air Deflectors - Unit heaters shall be furnished with horizontal air deflectors as standard

equipment. The deflectors may be adjusted to most any position desired for downward,

upward, or straight-out air flow.

I. Unit heaters shall be manufactured by Vulcan, AirTherm, Trane, Modine, Sterling, or as

approved equal.


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2.4 AIR AND DIRT SEPARATORS:

A. Furnish and install as shown on the plans an external coelescing type air and dirt high

velocity control unit consisting of a steel tank. The unit shall have in-line flanged inlet and

outlet connections and strainer removal connection. The removable strainer shall be of

stainless steel with 3/16" diameter perforations and a free area of not less than five times

the cross-sectional area of the connecting pipe. Unit shall have separate top fittings for

connection to system make-up water and for air vent. There shall be a bottom connection

for blowdown cleaning. Unit shall be constructed in accordance with ASME Boiler and

Pressure Vessel Code and stamped 125 psig design pressure. Provide ring bases for pad-

mounted air separators. The air control unit shall be Model VDT as manufactured by

Spirotherm.

2.5 EXPANSION TANKS:

A. Furnish and install as shown on the drawings, pre-pressurized captive air bladder type

expansion tank pre-charged with air. Tank shall be suitable for a maximum working

pressure of 125 psi and constructed and certified to ASME Section VII. It shall have a

replaceable elastomeric bladder suitable for a maximum operating temperature of 240-

degrees F (115-degrees C). It shall have an integral steel base ring for vertical mounting.

Expansion tank shall be CA Series as manufactured by Taco, Armstrong, Bell & Gossett

or Wessel.

2.6 VARIABLE SPEED DRIVE

A. Provide variable speed drive (VSD) controllers for heating water pumps and as indicated on the

drawings. All variable speed drives shall be by the same manufacturer, weather furnished as a

separate piece of equipment or provided as a component of manufactured equipment. Acceptable

manufacturers are ABB or Yaskawa.

B. The adjustable frequency controller (AFC) shall convert three-phase 60 Hertz utility power to

adjustable voltage and frequency, three-phase, AC power for stepless motor control from 5% to

110% of base speed. Provide interface card compatible with the BACNET Energy Management

System for remote EMS control and monitoring. The VSD shall be capable of receiving remote

start/stop commands, drive failure alarm and external speed control signal hardwired from the

EMS.

C. The AFC shall be a voltage source type with a PWM output utilizing power transistor semi-

conductors.

D. The AFC together with all options and modifications shall mount within a standard NEMA 1

enclosure suitable for continuous operation at ambient temperature of 0-degrees C to 40-degrees

C with relative humidity to 95% non-condensing. All high voltage components within enclosure

shall be isolated with steel covers. The complete unit shall be UL Approved and UL Labeled.

E. Circuits shall provide DV/DT and DI/DT protection for semi-conductors. AFC shall be capable

of starting into a rotating load without delay. Protective circuits shall cause instantaneous trip

(IET) should any of the following faults occur:

1. One-hundred-ten percent of controller maximum sine wave current rating is

exceeded.


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2. Output phase to phase and phase to ground short circuit condition.

3. High input line voltage.

4. Low input line voltage.

5. Loss of input phase.

6. External fault. This protective circuit shall permit, by means of the terminal strip,

wiring of remote NC safety contacts such as high static, firestat, etc., to shut down

the drive.

F. The following adjustments shall be available in the controller and retained in non-volatile

memory:

1. Maximum frequency (15 to 400 Hz) factory set at 60 Hz.

2. Minimum frequency (3 to 60 Hz) factory set at 6 Hz.

3. Acceleration (.1 to 360 seconds) factory set at 20 seconds.

4. Deceleration (.1 to 360 seconds) factory set at 20 seconds.

5. Volts/Hertz ratio factory set for 460V at 60 Hz.

6. Voltage offset or boost factory set at 100% torque.

7. Current limit (50% to 110% sine wave current rating) factory set at 100% current.

G. The AFC shall have the following basic features:

8. Door-mounted operators controls consisting of a membrane command center,

which allows manual stop/start and speed control, local/remote indication and

manual/or automatic speed control selection. In addition, the command center will

serve as a means to configure controller parameters such as min speed, max speed,

acceleration and deceleration times, volts/Hz ratio, torque boost, etc.

9. Main input disconnect to provide a positive disconnect between the controller and

all phases of the incoming A-C line. This disconnect shall be mounted inside the

controller enclosure and have through-the-door interlocking toggle with provisions

for padlocking.

10. Electronic motor overload relay.

11. Automatic restart after power outage, drive fault or external fault, with drive in

automatic mode. The AFC shall allow three (3) restart attempts. After three (3)

restart attempts, the AFC will lockout and require a manual restart.

12. Door-mounted LED display for digital indication of:

a. Frequency output

b. Voltage output


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c. Current output

d. First fault indication

13. Relay contacts for remote indication of drive fault and motor running.

14. Smoke purge circuit to enable user supplied N.C. contacts to force controller to a

preset adjustable speed when opened.

15. Three critical frequency avoidance bands, field programmable via the membrane

command center. Each critical frequency avoidance band shall have a bandwidth

adjustable via keypad entry of up to 10 Hz.

16. Three programmable preset speeds which will force the AFC to a preset speed

upon a user contract closure.

17. Isolated process follower to enable AFC to follow a 4-20 mA or 2-10V DC external

control signal.

18. The AFC shall have the capability to ride through power dips up to 500 msec

without a controller trip depending on load and operating condition.

19. Manual bypass-to-line with magnetic contactors to transfer motor from the

variable frequency controller to full speed operation on utility supplied input power

while the motor is at any speed. Two motor contactors, electrically interlocked

shall be utilized, one contactor between the controller output and the motor and the

other between the bypass power line and the motor, providing across-the-line

starting.

H. Motor protection per National Electrical Code shall be provided in both the "controller" mode

and the "bypass" mode by a motor overload relay. The 115 volt A-C relay control logic, allowing

common start/stop commands in the "controller" mode and the "bypass" mode shall also be

included within the enclosure.

I. The bypass shall include a door interlocked, main power input circuit breaker providing positive

shutdown of all power to both the bypass circuitry and the AFC. The bypass circuit shall also

include a second input disconnect to the AFC. This disconnect shall provide the ability to safely

trouble shoot and test the controller, both energized and de-energized, while operating the bypass

mode. Terminal connectors for overpressurization switches shall be provided, to protect the

ductwork in the bypass mode.

J. The AFC and all components shall be supplied within a single NEMA 1 enclosure, and shall be

UL Listed as a single unit.

K. The AFC Manufacturer shall maintain and staff nationwide service centers. These service

engineers shall be employed by the Manufacturer and provide start-up service including physical

inspection of drive and connecting wiring and final adjustments to meet specified performance

requirements.

L. The AFC shall carry a full parts and labor warranty for five (5) years from date of Owner

acceptance of the equipment.

M. The variable speed drive manufacturer shall approve the use of the motors supplied with the

associated equipment. Coordinate with equipment manufacturers.


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N. Provide auto-reset phase protection; ICM-450 under-voltage, overvoltage, loss of phase, phase

reversal protection and time delay with auto reset. Coordinate installation with Division 16.

O. Provide a spare washable intake filter for each drive.

P. Provide spare fuses for each drive. Store fuses in a wall box adjacent to each drive.

2.7 Boiler and Water Heater Flues

A. Boiler Chimneys

1. SUMMARY

A. This Section includes the following:

1. Listed double-wall vents.

2. Barometric Dampers

2. SUBMITTALS

A. Product Data: For the following:

1. Building-Heating-Appliance Chimneys

2. Barometric Dampers

B. Shop Drawings: Include plans, elevations, sections, details, and attachments to other work.

1. Detail equipment assemblies and indicate dimensions, weights, loads, required

clearances, methods of field assembly, anchoring requirements, expansion compensation,

pressure relief devices, components, hangers and seismic restraints, and location and size

of each field connection.

2. For installed products indicated to comply with design loads, include calculations

required for selecting seismic restraints and structural analysis data signed and sealed by

the qualified professional engineer responsible for their preparation.

C. Welding certificates.

D. Warranty: Special warranty specified in this Section.

E. Vent Systems Sizing Calculations: Computer calculated sizing analysis for the boilers

and/or water heaters being furnished. The computer analysis shall include the make, model

number, firing rate and allowable back pressure for each vented appliance. The analysis shall also

include drawing detailing the vent system layout including lengths, number of fittings and sizes.

Where applicable expansion calculations and expansion joint selection shall also be included.

3. QUALITY ASSURANCE

A. Source Limitations: Obtain listed components through one source from a single manufacturer.

B. Welding: Qualify procedures and personnel according to A WS D1.1/D1.1M, “Structural

Welding Code-Steel,” for hangers and supports and A WS D9.1/D9.1M, “Sheet Metal Welding

Code,” for shop and field welding of joints and seams in vents, breeching, and stacks.

C. Certified Sizing Calculations: Manufacturer shall certify venting system sizing calculations.

4. WARRANTY

A. Special Warranty: Manufacturer’s standard form in which manufacturer agrees to repair or

replace components of venting system that fail in materials or workmanship within specified

warranty period. Failures include, but are not limited to, structural failures caused by expansion

and contraction.


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1 Warranty Period: Standard 5 years from date of Substantial Completion. Generally

accepted engineering practices have been followed to determine that sizing and material

specifications are suitable for the application and environment involved. The undamaged

components have been correctly installed in accordance with the installation instructions

published by the manufacture at the time of shipment.

5. LISTED BUILDING-HEATING-APPLIANCE CHIMNEYS

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

following:

1. Schebler Chimney Systems

2. AMPCO

3. Selkirk Metal Bestos

B. Description: The factory built modular chimney shall be laboratory tested and listed in accordance

with Underwriters Laboratories Standard UL 103 for use with building heating equipment burning

gas, solid or liquid fuels with flue gases not exceeding 1400°F continuous operations and 1800°F

intermittent operation. Products listed “to” UL standards by other testing agencies are not allowed.

C. Assembly: Pipe sections must be joined using a ½” flange connection with factory supplied vee

bands and joint sealant. Products joined utilizing a method other than a 1\2” flange connection,

or those using perforated vee bands, will not be accepted.

D. Construction: Between the inner and outer shells there shall be a minimum 1” of air gap. Stainless

steel centering clips shall be welded to the outer shell to maintain the 1" spacing and ensure

concentricity of the shells.

E. Inner Shell: Inner shell material shall be type 304 stainless steel for natural gas and number 2 oil

fired appliances. Inner shell thickness shall be .036" for 5" to 36" diameter systems and .048" for

37" to 48" diameter systems. All inner shell seams shall be full penetration welded the entire

length of the pipe section. Riveted, tack or spot welded seams are not permitted

F. Outer Jacket: Outer shell material shall be 430 stainless steel with a thickness of .034" for 5" to

36" diameter systems and .052" for 37" to 48" systems. (Outer shell thickness of optional type

304 or 316 stainless steel shall be .030" for 5" to 36" diameter systems and .048" for 37" to 48"

diameter systems). All outer shell seams shall be full penetration welded the entire length of the

pipe section. Riveted, tack or spot welded seams are not permitted.

G. Accessories: Tees, elbows, increasers, draft-hood connectors, terminations, adjustable roof

flashings, storm collars, support assemblies, thimbles, firestop spacers, and fasteners; fabricated

from similar materials and designs as vent-pipe straight sections; all listed for same assembly.

6. BAROMETRIC DAMPERS (If required by appliance manufacturer, draft conditions, or vent

layout.)

A. Damper Construction: High-temperature-enamel-painted steel damper and housing with

galvanized- steel breeching connection. Adjustable counterweight with lock. Include knife-edge

bearings that do not require lubrication.

7. EXAMINATION

A. Examine areas and conditions for compliance with requirements for installation tolerances and


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other conditions affecting performance of work.

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

8. APPLICATION

A. Listed Building-Heating-Appliance Chimneys: Dual-fuel boilers, oven vents, water heaters, and

exhaust for engines.

9. INSTALLATION OF LISTED VENTS AND CHIMNEYS

A. Locate to comply with minimum clearances from combustibles and minimum termination heights

according to product listing or NFPA 211, whichever is most stringent.

B. Seal between sections of positive-pressure vents and grease exhaust ducts according to

manufacturer’s written installation instructions, using sealants recommended by manufacturer.

C. Support vents at intervals recommended by manufacturer to support weight of vents and all

accessories, without exceeding appliance loading.

D. Slope breechings down in direction of appliance, with condensate drain connection at lowest

point piped to nearest drain.

E. Lap joints in direction of flow.

F. Erect stacks plumb to finished tolerance of no more than 1 inch out of plumb from top to bottom.

10. INSTALLATION OF BAROMETRIC DAMPERS: IF APPLICABLE

A. Secure barometric dampers to breeching with hardware compatible with connected materials.

B. Locate barometric dampers as close to appliance outlet as possible.

A. Domestic Water Heater Flue

1. Under Base Bid: Provide Innoflue by Centrotherm, UL 1738 listed single wall (SW)

polypropylene vent. Install per the manufacturer’s recommendation. Provide ten (10) year

warranty. Provide aluminum jacket over exterior piping.

Under Add Alternate No. 2: provide boiler vent material as described in Part A.

2.8 DUPLEX FUEL OIL PUMP SET

1. Furnish and install where indicated, a custom duplex fuel oil pump package to suite

the available space as manufactured by Hydronic Modules Company or approved equal.

The pump package shall be suitable for pumping commercial No. 2 fuel oil at a capacity of

not less than 3 gpm/ gph at 100 psig. The assembled unit shall be mounted on a steel base

with a 1” drip rim and shall be complete with the following:

(2) Tuthill “LE” U.L. Listed Rotary Gear Pumps

(2) TEFC motors

(1) Duplex Cast Iron Basket Strainer with stainless steel screens

(2) Discharge Check Valves

(4) Isolation Full Port Ball Valves

(2) Discharge Relief Valves

(1) Compound Gauge on Suction Strainer, Liquid Filled


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(2) Discharge Pressure Gauge (one per pump), Liquid Filled

(1) Common Discharge Connection (1/2”), (3/4), (1”), (1.5”), (2”)

2. Pumps shall be direct drive, positive displacement type, UL listed and suitable for

pressures up to 300 psig as manufactured by Tuthill, Vican, or Viking.

Package Options:

Differential Pressure Indicator on duplex strainer

Simplex Basket Strainers

3. The assembled pump package shall include a NEMA I or (NEMA 12) UL Listed per

UL508 Industrial control panel complete with a main disconnect, power fuses, magnetic

starters, thermal overloads, alternator, H-O-A switches, pump run lights, pump failure

lights, pump failure circuit with time delay and manual reset for each pump. An audible alarm

with alarm silence switch shall be activated by pump failure or motor overload. A

differential pressure switch shall be furnished with each pump for the pump failure circuit.

A control transformer shall be supplied for three phase systems. All devices in the panel

shall be touch safe design.

Control Panel Options:

Elapsed Time Meters

Circuit Breaker in lieu of Fuses

One Fused Disconnect for Each Pump in lieu of one main disconnect

Phase Failure Relay

Dirty Strainer Indicator Pilot Light

4. The completed pump package shall be pressure tested for 24 hours and all controls

shall be sequenced tested prior to shipment. A copy of factory test shall be kept on file

and available upon request.

5. Provide factory start-up, demonstration and training for the owner’s personnel.

2.9 DOMESTIC WATER BOOSTER PUMP (Add Alternate No. 1)

A. GENERAL

1. WORK INCLUDED

A. Furnish and install equipment, specialties and accessories to provide water booster system

Installation as shown on drawings and hereunder specified.

B. Size and capacity as specified on the drawing.

2. RELATED WORK

A. General Conditions: Divisions 1

B. PRODUCTS

1. DOMESTIC WATER BOOSTER PUMP


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A. Furnish and install one VC Systems “ECO Series”, MODEL NUMBER variable speed

domestic water booster system. The system shall be rated for a total capacity of 240 GPM at

a system pressure of 70 PSIG when supplied with a minimum suction supply

pressure of 5 PSIG and designed for a maximum suction supply pressure of 65 PSIG.

The system shall be UL Listed as a packaged pumping system, and shall bear the UL Listed

Mark. The system shall be third party certified to NSF 372 (Lead Free).The system shall

consist of two (2) horizontal end suction pumps connected to an underground suction type

gravity storage tank, remote control panel with variable speed drives and remote hydro-

pneumatic tank, assembled in the field and certified by the manufacturer.

B. Pump and Motors: Pumps shall be VC Model V, ductile iron, 304 S/S fitted, end suction

centrifugal pumps with 304 stainless steel impeller and stainless steel trim & sleeve.

Motor shall be a Baldor or equal C frame, ODP, High Efficiency motor for 3500 RPM

and suitable for “Inverter Duty”. Motors shall be supplied with a 1.15 service factor.

Pumps shall be selected for non-overloading service through the entire curve. The impeller

shall be warranted for no less than 5 years from corrosion and defects. Pumps shall be

NSF/ANSI 61 Certified.

1. Pump No. 1: 120 GPM at 160 TDH with XHP, 3450 RPM ODP motor.

2. Pump No.2: 120 GPM at 160 TDH with XHP, 3450 RPM ODP motor.

C. ISOLATION VALVES: Furnish isolation valves on the inlet and outlet of each pump

to provide for service of any individual pump without shut-down of entire system. Valves

shall be butterfly valves with full lug epoxy coated body, stainless steel stem, EPDM seat

and nylon coated ductile iron, bronze, or stainless steel disc for prevention of wear and

corrosion control. Each valve shall be supplied with a lever handle and locking plate.

Valves rated for 250 PSI working pressure.

D. CHECK VALVES: Furnish pump check valves of the pilot style, non-slam “quiet” type

with cast iron body and bronze trim, plug, stainless steel spring, bushing and seat. Valves

shall be 125# flanged, for liquid duty at 240 psi maximum working pressure. Supply one

check valve on the discharge of each pump. Basis of design is Cla-Valve 81-12,

ANSI/NSF 61 Listed.

E. THERMAL SAFETY VALVES: Furnish and supply a non-electric, modulating thermal

safety valve for the discharge of each pump. This valve shall be of stainless steel

construction with stainless steel trim, suitable for 400 psi working pressure. Valve shall be

of two piece construction and require no electrical connection. Valve operates from 95

deg. to 105 deg. F.

F. HEADERS AND PIPING: Furnish and install header pipe of 304 stainless steel, with

150# flanged connections and double ended system connections for field connection in

either direction. The entire pumping system shall be flanged design, except for the

transition from threaded pumps to the system piping. This transition shall be done with

stainless steel nipples and cast iron companion flanges. The system headers shall be

sized to match the system piping or a maximum velocity of 10 FPS.

G. VIBRATION ISOLATION: The pumping system shall be mounted directly on rubber-

in-shear vibration mounts and supplied with single sphere flexible connector at each

system connection.


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H. REMOTE CONTROL PANEL: (UL LISTED): Furnish and install one VFD motor control

center, with single point power connection. The control shall be mounted in a NEMA 4,

UL Type 1, powder coated enclosure with door gasket for protection against the pump room

environment. Each controller shall be supplied with the following standard features:

Minimum SCCR rating 5,000 / 100,000 with class J fuses upstream.

1. Main disconnect switch with door interlocking handle & door lockout

2. Main, Class J, high speed electronic fuses in accordance with NFPA 70

3. Control power transformer with primary and secondary fusing

4. Automatic and Manual alternation

5. Numbered control terminal strip

6. Low suction pressure alarm & cut-off with T.D. off, automatic reset

7. Low system pressure alarm with T.D., automatic reset

8. High system pressure alarm & cut-off with T.D. off, manual reset

9. Common audible alarm horn with silence pushbutton

10. Common red alarm pilot light & legend

11. Common NO & NC auxiliary dry alarm contacts for remote monitor

12. Panel door mounted HMI with PID control & Modbus interface

13. Dual stainless steel pressure transducers for system & suction pressure

14. 4.3” Color Touch Screen Display

15. All data adjustments provided from the CTS without entering the panel

16. Provide for drop down menu adjustments for primary operator settings

Displays shall display:

a) System pressure

b) Suction pressure

c) Set point pressure

d) Motor speed (RPM)

e) Motor output current (AMPS)

f) Motor output voltage

g) Drive faults

h) Active alarm status

i) Event log in real time, recording up to 100 events & alarms

j) Full Color Trend Graph for Speed, Suction & Discharge Pressure

I. VARIABLE FREQUENCY DRIVES: (ABB ACH550) Furnish a VFD for each motor,

suitable for use with the Baldor or equal motor. Provide shaft grounding rings with

motor. The drives shall be a microprocessor controlled PWM output drive for variable

torque duty and supplied for the maximum full load amps produced by the motor. The drive

shall be Series ACH550, UL Listed, and in a NEMA 1 self contained enclosure. Each drive

shall be furnished with a removable, digital keypad, to allow the operator flexibility and

control. The keypad shall have a 32 character, English alpha-numeric display. The keypad

shall allow the operator to individually control each motor manually from digital keypad,

without entering the control panel. Drive must be supplied with input line reactors. The

drives shall be mounted external from the control panel to keep heat outside the panel cabinet

and extend life cycle of electrical equipment

J. SEQUENCING AND LOGIC CONTROLS:


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1. Logic controller shall contain a logic program that will monitor system operation and add

or subtract pumps as required to meet changing demands. Field adjustable time delays shall be

provided to prevent false starting of pumps. Controller shall employ cascaded sequence logic

to provide smooth transitions and reduce overall pressure disturbance when pumps are added

or removed from operation. All start sequences shall be interlocked using a technique that

prevents simultaneous starting or delay time to prevent short cycling of pumps. Stop

delay timers shall stop in the reverse order in which they started. Control logic shall

prevent multiple pumps from stopping simultaneously.

2. Pressure shall be controlled using a closed loop control strategy. A proportional integral

derivative (PID) control algorithm will continuously monitor system pressure, process error,

and current operating speed and calculate a new speed that will correct pressure deviations

without overshoot. PID control system shall be provided with field configurable outputs,

100ms sampling, advanced PID logic that is adjustable from the operator interface from the

panel door. PID functions shall conform to UL, CSA and CSE standards. Flow meters are

not acceptable for pump staging, as they cannot detect normal pump wear and adjust as needed,

and specified hear. Pump system shall be supplied with “Sleep Mode” when periods of no flow

are detected.

K. OPERATOR INTERFACE: Provide a minimum 4.3” full color touch screen

operator interface located on the panel door, and carry a NEMA 4 rating. The

operator interface shall provide for all control adjustments without entering the control

cabinet. The operator interface shall be password protected to prevent unauthorized access to

the control software, but allow the operator to make primary pressure adjustments from the

door via drop down menus with instruction screens. The screen shall provide live display of

system pressure, suction pressure, current motor speed by percent of speed and the ability

to display the status of pumps from 1 to 3 units, and active alarm status. The controller shall

allow the operator to monitor attempt to determine NO flow and display system status

for Sleep Mode (Lead Pump Shut Down). The “Operator Interface” shall be powered

from 24 VDC power supply.

L. FABRICATION: The pumping system shall be provided as a complete packaged

system mounted on a minimum 4” fabricated channel base suitable for mounting directly

on vibration isolation without distortion. The system shall be piped, wired and supplied

with control tubing to allow field installation with only two system connections, one

electrical connection, and one run of tubing to drain for the thermal system. The entire

package shall be painted with industrial grade primer and enamel.

M. BLADDER TANK: Provide a bladder tank with the pumping system and mount it

remotely where indicated on the drawings. The tank shall be minimum of 53 gallons,

ASME, and suitable for 150 PSI working pressure and domestic water.

N. TESTING AND START UP: The entire system shall be cleaned and shop coated

with industrial shop enamel and run tested prior to shipment. Systems providing

hydrostatic pressure test and electrical circuit check will not be acceptable. The control

settings shall be set in accordance with specified set points and verified at field start up.

The start-up shall be done by a factory authorized representative with report to the owner’s

representative. The package shall be UL listed as a system for its intended use as required

by OSHA and National Electric Code ( NEC) Article 90-7.

O. Warranty: the pumping system shall be warranted from manufacturing defects and defects

in materials and workmanship for a period of 24 months from substantial completion.

P. Approved Manufacturer: VC Systems and Controls (Basis of design)


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1. Alternates to basis of design must meet all specifications above to be considered equal.

Contractor shall be responsible ensuring submitted products to the engineer meet the

above specification and any deviations be noted clearly in submittal. Alternative

manufacturers include, but are not limited to:

Penn pumps

Grundfos

Bell and Gossett

Q. Submittals: Manufacturer shall include a full submittal with the following cut sheets as a

minimum.

1. Cover Page – Showing system manufacturer, type, capacities, pumps, and voltage.

2. Drawing – Job specific drawing with all critical dimensions and connections.

3. Pump Data – Pump curve, pump data sheet, and manufacturer.

4. Valve Data – Data sheets on all isolation valves and check valves and sizes.

5. Wiring Diagram – Including sequence of operation, connection diagram, complete wiring

diagram, and electrical data – MCA, FLA, SCCR, Voltage.

6. Variable Frequency Drive Data – Include data sheets for drive supplied.

7. Certifications – UL, ARRA, NSF and Warranty shall be included.

C. EXECUTION

1. INSTALLATION-COLD WATER BOOSTER SYSTEM

Contractor to provide and install, where shown on the drawings and specified, a water pressure

booster system. The system shall be installed with flexible connectors and vibration isolators if

max working pressure is under 200 PSI. Vibration isolation and flex connectors shall be supplied

by booster system manufacturer. Minimum clearance is 18” around the system and NEC

clearance in front of the control panel door.

2. Provide 8 hours minimum training for the owner in addition to demonstration.

3. Coordinate and interlock alarms, on-off controls and monitoring through terminal strips to the Johnson

Controls EMS.

2.10 DOMESTIC WATER HEATERS

A. GENERAL

1. RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Divisions 1 Specification Sections, apply to this section.

2. SUMMARY

This section includes condensing gas-fired storage water heaters for potable water.

3. REFERENCES

A. ASME Boiler and Pressure vessel code, section IV, Part HLW

B. ANSI Z21.10.3 /CSA 4.3 “Gas Water Heaters”


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C. ASHRAE/IES 90.1

D. DOE/EPA Energy Star

E. ISO 9001 Quality Management System

F. CSD-1 “Controls and Safety Devices for Automatically Fired Boilers”

G. NFPA 70- National Electric Code

H. NFPA 54- National Fuel Gas Code

I. NSF/ANSI Standard 61- Drinking Water System Components

J. NSF/ANSI Standard 372 – Drinking Water System Components – Lead Content

K. NSF 5 – Water Heaters, Hot Water Supply Boilers and Heat Recovery Equipment

L. ASTM G123 - 00(2005) “Standard Test Method for Evaluating Stress-Corrosion Cracking of

Stainless Alloys with Different Nickel Content in Boiling Acidified Sodium Chloride Solution.”

4. SUBMITTALS

A. Product Data: Include rated capacities; shipping, installed, and operating weights; furnished

specialties and accessories for each model indicated.

B. Shop Drawings: Detail equipment assemblies and indicate dimensions, required clearances,

components, and size of each field connection

C. Wiring Diagrams: Detail for wiring power signal, differentiate between manufacture- installed

and field-installed wiring

D. Maintenance Data: Include in the maintenance manuals specified in Division 1. Include

maintenance guide and wiring diagrams

5. REGULATORY REQUIREMENTS

A. Conform to applicable code for internal wiring of factory wired equipment

B. Units: ETL, UL or CSA Certified as a Complete Gas Fired Water Heater Assembly.

C. Gas Train shall comply with ANSI Z.21.10.3 or UL 795.

D. Conform to ASME Section IV. Part HLW for Water Heater construction.

6. QUALITY ASSURANCE

A. Listing: The water heater will be listed ETL listed to UL 795 or ANSI Z21.10.3/CSA 4.3 “Gas

Water Heaters”

B. ASME Compliance: Water heater shall bear the ASME HLW stamp and be National Board listed


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C. Water heaters with full rated input between 199,000 and 300,000 BTU will operate at a minimum

95.3% thermal efficiency at full firing rate when tested to the ANSI Z21.10.3 thermal efficiency

test protocol (DOE 10 CFR 431).

D. The water heater will comply with current ASHRAE 90.1 requirements.

E. Water heater manufacturer certified to the ISO 9001 International Quality System.

7. COORDINATION

Coordinate size and location of concrete bases

8. WARRANTY

A. Storage tank, heating surfaces, and combustion chamber will have a manufacturer’s 15-year

warranty (8 years non-prorated, 7 years prorated) covering manufacturing or material defects,

waterside or fire side corrosion, leaks, and/or the production of rusty water.

B. Burner and all heater parts: 2 Years from Substantial Completion

B. PRODUCTS

1. MANUFACTURERS

A. Available Manufacturers: Manufacturer shall be a company specializing in manufacturing the

products specified in this section with minimum twenty years’ experience. The water heaters

shall be manufactured by a company that has achieved certification to the ISO 9001Quality

Management System.

B. The water heaters shall be ETL listed as a complete unit. The heater shall satisfy current Federal

Energy Policy Act standards for both thermal efficiency and stand-by heat losses as established

for gas fired water heaters.

C. Manufacturers: PVI is the basis of design. Acceptable manufacturers shall be subject to

compliance with the requirements. Alternate manufacturers shall include Book or Bradford

White.

2. CONSTRUCTION

A. Water heaters will be of the BTU input(s) and storage capacity indicated on the equipment

schedule.

B. The water heater will be a vertical fire tube, design that is constructed and stamped in accordance

with Section IV, Part HLW of the ASME code. Water heater will be National Board Registered

for a working pressure of 150 psi and will be pressure tested at 1-1/2 times working pressure.

C. Water heater will be a single-pass, down-fired, fire tube design contained within an integral

storage tank.

D. Tank, combustion chamber and fire tubes will be unlined. Lined or plated water heaters will not

be acceptable.


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E. Tank, combustion chamber and fire tubes will be constructed from phase-balanced austenitic and

ferritic duplex steel with a chemical structure containing a minimum of 21% chromium to prevent

corrosion and mill certified per ASTM A 923Methods A to ensure that the product is free of

detrimental chemical precipitation that affects corrosion resistance. The material selected shall be

tested and certified to pass stress chloride cracking test protocols as defined in ISO 3651-2and

ASTM G123 - 00(2005) “Standard Test Method for Evaluating Stress-Corrosion Cracking of

Stainless Alloys with Different Nickel Content in Boiling Acidified Sodium Chloride Solution.”

F. Tank will be welded utilizing joint designs to minimize volume of weld deposit and heat input.

All heat affected zones (HAZ) shall be processed after welding to ensure the HAZ corrosion

resistance is consistent with the mill condition base metal chemical composition. Weld

procedures (amperage, volts, welding speed, filler metals and shielding gases) utilized shall result

in a narrow range of austenite-ferrite microstructure content consistent with phase balanced

objectives for welds, HAZ and the base metal.

G. All internal and external tank surfaces shall undergo full immersion passivation and pickling

processing to meet critical temperature, duration and chemical concentration controls required to

complete corrosion resistance restoration of pressure vessel surfaces. Other passivation and

pickling methods are not accepted. Immersion passivation and pickling certification documents

are required and shall be provided with each product.

H. Materials shall meet ASME Section II material requirements and be accepted by NSF 61 for

municipal potable water systems. Storage tank materials shall contain more than 80% post-

consumer recycled materials and be 100% recyclable.

I. All water contacting tank surfaces will be non-porous and exhibit 0% water absorption.

J. All tank connections/fittings will be non-ferrous or stainless steel.

K. To preserve thermal efficiency, the water heater will not use or require a circulator piped from the

hot water outlet to the cold water inlet of the heater for the purpose of temperature control during

normal operation. Connection for a building return circulation line will be made to a dedicated

hot return fitting at the center of the storage vessel and not the cold inlet piping. Connection to a

sidearm tank, if used, will be made to a dedicated hot return fitting at the center of the storage

vessel and not the cold inlet piping.

L. Finished vessel will not require sacrificial or impressed current anodes and none will be used.

Water heaters or sidearm storage tanks that employ anode rods of any type will not be acceptable.

M. Combustion will be provided by a premix, fan-assisted surface burner with a gas train meeting

UL, ANSI and FM standards for the input specified.

N. Burner will be stainless steel or equal with same warranty.

O. Gas train components will capable of self-proportionating gas and air to maintain optimum

combustion in response to varying vent pressures.

P. At 199,000 to 399,000 BTU input, the burner will be fixed input.

Q. At 500,000 BTU input and higher, the burner will employ non-linkage modulation utilizing only

a VFD drive to vary gas and air.

R. Burner NOx emissions will be less than 20 ppm when corrected to 3% oxygen.


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S. Water heater will be a category IV, condensing appliance and vent through AL-29 Stainless Steel

or Polypropylene. Water heater will satisfy requirements for sealed combustion. Vents for inlet

air and exhaust can terminate in different pressure zones.

T. The unit shall be provided with a propane (LP Gas) burner.

3. PERFORMANCE

A. Water heaters with full rated input between 199,000 and 300,000 BTU will operate at a minimum

95.3% thermal efficiency at full firing rate when tested to the ANSI Z21.10.3 thermal efficiency

test protocol (DOE 10 CFR 431).

B. Water heater will meet the thermal efficiency and standby heat loss requirements of the latest

version of the ASHRAE 90.1 standard.

C. Water heater will be certified by the DOE/EPA Energy Star program for commercial water

heaters, whereby standby loss and thermal efficiency are independently tested and certified.

D. Water heater will be third party tested and certified to NSF 5.

E. Water heaters will be third party tested and certified to NSF/ANSI 372 standard for lead content.

4. WATER HEATER TRIM

A. As a minimum, the heater will be equipped with the following:

a. electronic flame monitoring

b. electronic low water cutoff

c. an immersion operating control

d. an immersion UL listed temperature limiting device

e. an ASME- rated temperature and pressure relief valve

f. condensate drain neutralizer kit

B. Operating and safety controls shall meet the requirements of CSD-1/GEGAP and MASS code

C. The water heater shall employ an electronic operating control with digital temperature readout.

Operator shall be capable of connecting to a building automation system through serial

connection using Modbus RTU protocol.

D. A protocol gateway for BacNet MSTP/IP shall be provided

A protocol gateway for Lonworks shall be provided.

.

C. EXECUTION

1. INSTALLATION

Install water heaters level and plumb in accordance with manufacturers written instructions and

referenced standards.


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2. FINISHING

The storage and heating sections shall be completely factory packaged on a single skid, requiring

only job site hookup to utilities, venting, and plumbing. The heater shall be insulated to meet

current ASHRAE 90.1standby loss requirements and jacketed with a polyethylene liner consisting

of 100% recycled material. Pressure vessel shall include a ball-type drain valve. The heater shall

fit properly in the space provided and installation shall conform to all local, state, and national

codes.

3. START-UP

Start up on the unit will be performed by factory trained and authorized personnel. A copy of the

startup report will be provided to the owner.

4. TRAINING

Refer to section 15100 for training.

END OF SECTION

Telephone Number/Email: ______________________________________________________

Company Name of Bidder/Contractor: ________________________________________________

Address: ___________________________________________________________________

*Note: Bidder must sign and submit Addenda with the proposal submission. The same person

signing the Addenda acknowledgement(s) must sign the Bid Form.

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