NC0021474_Correspondence_20240318

SECTION 462157 ELEMENT SCREEN & WASHER COMPACTOR
PART 1 - GENERAL
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General Conditions
and Division 01 Specification Sections, apply to this Section.
SUMMARY
This Section includes requirements for furnishing:
1. One (1) 304 stainless steel, element screen
2. One (1) 304 stainless steel screenings washer compactor
3. One (1) main control panel
Equipment shall be installed as shown on the contract drawings and
specified herein, as recommended by the manufacturer, and in
compliance with all local, state and federal codes and regulations. All
associated piping, valves, controls, wiring, and additional appurtenances,
in accordance with this section of the Contract Documents shall be
provided.
B. These Specifications are intended to give a general description of the system
required, but do not cover all details; which will vary in accordance with the
requirements of the equipment as offered. They are, however, intended to cover
the furnishing, shop testing, delivery and complete installation and field testing of
all materials, equipment and appurtenances for the complete unit as herein
specified, whether specifically mentioned in these Specifications or not. The
scope of work includes providing a manufacturer's authorized representative to
perform start up of the equipment, and to instruct the Owner's personnel in the
care, operation and maintenance of all equipment provided under this section.
C. The Contractor shall coordinate all dimensions with the screen manufacturer.
Any modifications to the dimensions of the new headworks channel required by
the screen manufacturer to adequately install the new screens must be approved
by the Engineer.
D. The equipment shall be of the latest design and shall be fabricated of materials
and in a fashion, which will perform the functions, described below.
E. Unless otherwise noted, all materials and equipment supplied under this Section
shall be new, of good quality, and in good condition.
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1.3 REFERENCES
A. The Element Screen shall, as applicable meet the requirements of the following
industry standards:
1. AISI (American Iron and Steel Institute)
2. ANSI (American National Standards Institute)
3. ABMA (American Bearing Manufacturers Association)
4. AGMA (American Gear Manufacturers Association)
5. ASTM (American Society for Testing and Materials)
6. ASME (American Society of Mechanical Engineers)
7. NEC (National Electrical Code)
8. NEMA (National Electrical Manufacturer's Association)
9. NFPA (National Fire Protection Association)
10. Occupational Safety and Health Administration (OSHA)
11. UL (Underwriters Laboratory Standards)
12. WSC (American Welding Society Code)
1.4 QUALITY ASSURANCE
A. In order to establish a quality standard for the manufacture and production of the
equipment, all manufacturers shall meet the requirements listed in this section.
B. All equipment shall be supplied by a reputable manufacturer, with at least ten
(10) years' experience in the manufacture of element screens and screenings
washer/compactor units. The manufacturer shall have supplied a minimum of
twenty (20) installations of similar units in the United States. All requirements of
these specifications must be met by all Manufacturers.
C. The minimum acceptable standards for the equipment shall conform to the
project contract documents as outlined in the respective sections of the
specifications and drawings.
D. Welding shall be in accordance with the AWS D1.1 code.
E. Equipment shall be as manufactured by Parkson Corporation, Andritz, or
prequalified equal. Manufacturers if specified are listed only to denote the
quality standard of product desired, general style, type, and character, and do
not restrict bidders to a specific Manufacturer. The requirements of these
specifications must be met by Manufacturers whether named above or approved
as equals. Should any equipment manufacturers have any deviations from
or exceptions to the requirements of this specification, a letter stating the
issues must be received by the Engineer at least fourteen (14) calendar
days prior to the date and time specified for receipt of bids to receive
consideration. Any approved exceptions or deviations will be addressed by
Addendum only.
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F. Selected screening supplier shall be responsible for furnishing entire
screening system, including element screen and screenings washer
compactor. It is the responsibility of the screen manufacturer to ensure
that all equipment is properly coordinated including: dimensions,
equipment connections, and design capacities.
1.5 SUBMITTALS
A. Pregualification: Manufacturers wishing to supply equipment for this project must
submit a prequalification submittal for approval to the Engineer. The
prequalification submittal must be received by the Engineer at least
fourteen (14) calendars days prior to the date and time specified for receipt
of bids to receive consideration. The submittal shall demonstrate that the
proposed equipment meets the requirements of the Contract Specifications and
Drawings. The Engineer will issue an addendum prior to the bid date listing the
prequalified manufacturers. The prequalification submittal shall include, as a
minimum, the following information:
1. Literature and catalog cut sheets of all equipment to be supplied, including
technical and performance requirements of the equipment components.
2. List showing materials of construction of all components.
3. Information on field erection requirements, including total weight of
assembled components.
4. Copy of the warranty.
5. A certificate of compliance or a complete list of deviations from the
drawings and specifications.
6. A complete list of any modifications required to the proposed layout for
installation of the equipment.
7. The manufacturer shall provide a list of at least 20 successfully operating
installations within the United States of element screens for wastewater.
At least five (5) of these installations shall have been supplied in the past
five (5) years. The installation list shall include owner's name, site/plant
name, location, screen size, and contact information.
8. A written statement from the manufacturer indicating that the
manufacturer has reviewed the proposed application as detailed in the
Contract Drawings and Specifications, and that all equipment, materials
and systems proposed to be supplied are appropriate and compatible for
this specific application.
Note: The submittal of prequalification information does not omit the requirement
for the Contractor and manufacturers to submit complete shop drawing
submittals to the Engineer in accordance with the Contract Documents.
Incomplete submittal packages may result in the manufacturer not being
prequalified to supply equipment on this project.
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B. Shop Drawings
1. Shop Drawings shall be submitted to the Engineer in accordance with
Section 013300 "Submittal Procedures". The shop drawings shall include
installation drawings, materials of construction, and catalogue cut sheets
for all materials being supplied. Submittals shall include the following:
a. Detailed information shall be provided in the shop drawings for all
items including but not limited to screens, motors, reducers, motor
controllers, wiring diagrams, instrumentation, anchor bolt locations,
etc. The shop drawings shall also include manufacturer's installation
requirements and a list of recommended spare parts.
b. List showing materials of construction of all components
C. Information on filed erection requirements, including total weight of
assembled components
d. Wiring and schematic diagrams
e. Recommendations for short and long-term storage
f. A certificate of compliance or a complete list of deviations from the
drawings and specifications.
g. Copy of warranty
h. A written statement shall be provided from the screen
manufacturer stating that the manufacturer has reviewed the
proposed application as detailed in the Contract drawings and
specifications, and that all equipment, materials, and systems
proposed to be supplied are compatible with this specific
application.
C. Operation and Maintenance Manuals shall be submitted to the Engineer in
accordance with Section 017823 "Operation and Maintenance Data". The
manuals shall include the following information as a minimum requirement:
1. Assembly, installation, and adjustment instructions.
2. Lubrication and maintenance instructions.
3. Complete descriptive literature of all materials and components furnished.
4. Erection drawings with equipment mark numbers.
5. Complete control panel fabrication drawings with wire numbers and field
modifications. Control panels drawings shall include control schematic.
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1.6 WARRANTY
A. The Contractor shall include in the bid price for this item a guarantee to the
Owner, from the manufacturer(s), for one (1) year from the date of final
acceptance by the Owner, that the screens, and screenings washer compactor,
including ancillary equipment, apparatus and parts, shall be free from defective
materials, equipment or workmanship, including with respect to equipment, the
services of qualified factory trained servicemen, as may be required. Under the
guarantee, the manufacturer shall furnish replacements for any component,
which proves defective, except those items that are normally consumed in
service, such as oil, grease, packing, gaskets, etc. Components failing to
perform as specified by the Engineer, or as represented by the manufacturer, or
proved defective in service during the warranty period, shall be replaced,
repaired, or satisfactorily modified by the manufacturer without cost of parts or
labor to the Owner.
B. Items specifically not covered by the warranty are consumable wear parts as
identified in the O&M manual.
C. The screens, and screw washer compactors shall be unconditionally guaranteed
to meet or exceed design criteria detailed in Part 2 of this specification.
1.7 DELIVERY, STORAGE AND HANDLING
A. All equipment shall be delivered, stored, and handled in strict accordance with
the manufacturer's recommendations.
1.8 MANUFACTURER AND SUPPLIER INFORMATION
A manufacturer's nameplate shall be securely and permanently mounted to
each individual piece of equipment furnished under this Section. The
nameplate shall be constructed of a durable, non -corrosive material.
Critical information shall be clearly engraved or otherwise permanently
stamped on the nameplate, and shall be fully legible. The information
contained on the manufacturer nameplate shall include at least the
following:
• Manufacturer's Serial Number
• Name, address and telephone number of equipment manufacturer
• Model and/or Part Number
• Performance Criteria (i.e., capacity, design point, etc.)
• Motor size, speed and voltage
• Enclosure Type or Rating
• Any other pertinent information
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Note: All equipment shall include a nameplate with a manufacturer serial
number validating the equipment as new. Failure to meet these
requirements will be cause for rejection of the equipment.
B. SUPPLIER AND SERVICE INFORMATION
A durable nameplate, stamp or sticker shall be adhered to each individual
piece of equipment containing the name, address, and telephone number
of the local business that supplied the equipment, and the name, address
and telephone number of the local business that can provide service and
replacement parts for the equipment. A 24-hour emergency service
telephone number should also be included.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. General
1. The mechanical screen shall be capable of processing a current peak flow
of 9.4 MGD of municipal wastewater with less than 18 inches head loss
with flow passage area 50 percent blocked and downstream channel liquid
depth of 32.5 inches. The angle of inclination shall be 75 degrees nominal
from horizontal. The openings in the screen elements shall be 1/4" (6mm).
2. Screens furnished per this Section shall be installed in a cast -in -place
concrete channel with a width of 36-inches and a depth of 72-inches as
indicated on the Drawings
3. The portion of the screen above the channel shall be equipped with
stainless steel covers to control the emission of odors, prevent water from
dripping on the floor behind the screen, and to protect operators from
contact with moving parts. All enclosures shall be readily and easily
removable. The covers shall have hinged sections on the front and rear of
the unit for access. The covers shall be fabricated from 304 SS.
4. The screenings washer shall be capable of processing the maximum
output of the screen supplied as recommended by manufacturer. The
dewatered screenings shall contain less than 60% moisture content
during normal operating conditions.
5. The screen shall be capable of presenting a clean filtration surface to the
oncoming liquid stream at all times during continuous operation. It shall be
capable of intermittent operation in order to form a mat of material to
provide maximum trash removal.
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6. The automatic screen will be designed to positively clean and remove
debris up to 3 inches in diameter from the influent stream by means of high
impact plastic filter elements designed to retain and elevate debris to the
discharge point of the unit.
7. The material to be handled will be debris removed from municipal
wastewater including but not limited to fecal matter, rags, plastics and fats,
oils, and grease in various concentrations.
8. Contractor shall coordinate all washwater connection points with the
equipment manufacturer.
2.2 SCREEN EQUIPMENT
A. Frame Assembly
1. The frame of the unit, which is stationary, shall be constructed from type
304 stainless steel with a thickness of 3/16 inch. It supports and locates
all of the operating components. The unit shall rest at the bottom of the
channel, and be anchored at the operating floor elevation. No mechanical
mounting or fastening of the unit frame is required to the sidewalls or
bottom of the channel.
2. The "A" frame unit shall be supported at the operating floor elevation by
support legs constructed from type 304 stainless steel. The legs shall be
designed to allow the unit to pivot the screen out of the channel without
dewatering (e.g. for bypass purposes). Routine service of the unit is
possible with the screen in the channel.
3. Guide rails shall be mounted to each side on the inside surface of the frame
to direct the filter belt during its ascension out of the channel. The guide
rails shall be 1/2 inch thick and will be constructed from type 304 stainless
steel.
4. At the top of the screen, circular chain guides shall gently direct the filter
belt from its ascending path out of the channel towards the drive sprockets.
These circular guides shall be constructed from type 304 stainless steel
and shall be welded to a type 304 stainless steel shaft. In order to reduce
the wear on both the chain and chain guides, the shaft shall be secured to
bearings on each side of the frame and free to rotate.
5. Chain guides shall also be provided to direct the filter belt from the drive
sprockets to the descending path into the channel. These fixed rails shall
be constructed of type 304 stainless steel and shall be 5/8 inch thick.
6. Lower return guides shall be provided at the base of the screen to direct
the filter belt during its 180-degree turn from the descending to ascending
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paths. The lower guide rails shall be constructed from 1/2-inch thick type
304 stainless steel and shall be fixed in place as low as possible in the
frame to optimize the submerged screen area. No submerged bearing or
rotating guides are used that will require routine maintenance or that may
become fouled by trash and debris.
7. Neoprene rubber seals with type 304 stainless steel backing plates shall
be mounted along the upstream edges of the frame to seal the outer edge
of the frame against the channel wall, and the area between the frame and
filter belt side plates.
8. The bottom of the unit shall be sealed with two rows of nylon brushes,
which allow the elements to pass through, but prevents trash from passing
beneath the filter elements, ensuring capture of all solids and trash by the
filter belt.
9. All shaft bearings are mounted externally to the side frame for ease of
access and maintenance.
10. Full covers that allow for maximum maintenance access and minimize
dripping and misting will be provided. The covers shall be fabricated from
14 gauge type 304 stainless steel. All enclosures shall be removable and
lightweight.
11. Front covers will consist of 3 components: Lower cover will be a full width
bolt on piece. The middle cover, will be a single hinged front door mounted
above the lower cover. Screen widths greater than 3 feet will have double
hinged doors. The upper cover will hinge upward for easy access to the
chain, screen belt, spray system and rotating rails. The cover will have gas
assisted lifting mechanisms and positive locking arms.
B. Filter Belt/Screen Assembly
1. The screen shall provide dual filtration of all materials in order to minimize
compaction of captured debris and minimize the head loss through the
screen. This shall be accomplished by recessing the horizontal fine
filtration opening in the face of the screen. The coarse horizontal openings
formed by the upper or forward shank/arm of the elements shall be 6
millimeters and shall be the first opening the flow stream contacts as it
passes through the screen. The lower or recessed shank/arm of the
elements shall create a two dimensional grid which limits the maximum
vertical opening to 6 millimeters and the fine horizontal opening of 6
millimeters. The elements are arranged in a staggered fashion to form an
endless belt and to create a range of motion that allows the recessed
shank/arm of one row of elements to pass through the plane of the forward
arm of the next row of elements it meshes with. Each filter element shall
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be a single molded component with a rake integral to its shape. The filter
belt shall form a row of these rakes spaced every 4 inches, capable of
lifting material of up to 3 inches in diameter out of the channel. The
elements are secured to two separate filter shafts that pass through
individual bosses in the elements.
2. The side plates (or end plates) are mounted next to the outermost
elements of each filter row, and overlap to form a continuous moving
sidewall for the filter belt. This moving wall prevents captured trash and
debris from spilling over the sides of the filter belt. The side plates shall
be constructed from a high strength phenolic resin.
3. The tension of the moving screen/filter belt assembly shall be completely
supported by a stainless steel link chain. The chain must connect the filter
shaft ends on both sides of the belt assembly so that the elements are
free of tension, and support no weight of the assembly. The chain shall
be of closed link design with 2 link sidebars, chain rollers and pins per link.
The chain assembly shall have a minimum cross sectional area of 0.144
square inches at the weakest point of any individual link sidebar.
4. Chains shall be supplied with hollow pin construction that allows for the
removal and replacement of the filter shafts, side plates and filter elements
without releasing the chain tension. The unit is designed to allow this
function to take place at the operating floor elevation with the screen in
the channel. Chain rollers shall have a diameter of 1-3/4 inches.
5. All chain components shall be corrosion resistant stainless steel.
Sidebars shall be type 304stainless steel. Pins, bushings and rollers shall
be type 410 stainless steel. 400 series components shall be heat treated
to a minimum hardness of 39 on the Rockwell C Scale.
6. The filter shafts shall have a maximum diameter of 3/4 inch and be spaced
on 4-inch centers in the direction of travel of the filter belt. The shafts shall
be constructed from type 304 stainless steel.
C. Screen Belt Drive Assembly
1. The drive assembly consists of a gear reducer, motor, drive shaft, and
bearing with eccentric locking collar. The drive mechanism shall be
protected from the trash stream to ensure that the screen runs smoothly
without jamming. The driving force is transmitted to clean, trash free
components to avoid mis-tracking or binding, which could render the
screen inoperable, requiring manual cleaning and realignment.
2. The gear reducer is of hollow shaft design, mounted directly to the unit
external to the side frame and connected directly to the drive shaft with a
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keyless tapered bushing. The reducer shall be designed in accordance
with AGMA recommendations for Class II service based on the required
horsepower for operation of the machine.
3. The motor shall be a squirrel cage induction motor, TEFC, 230/460 volt, 3-
phase, 60 Hz, 1800 RPM. The motor Horsepower shall be 0.75. Motor
shall be acceptable for use in a Class 1, Division 2 environment in
accordance with paragraph 501-8(b) of the National Electrical Code.
4. Overload protection shall be provided by an electrical overload device that
senses motor current draw (SSAC Current Monitor or equal).
5. The filter belt drive shaft is located in the head of the unit and is supported
at each end by the hollow shaft reducer and bearing with eccentric locking
collar. The drive shaft sprockets that engage the filter belt chain rollers and
transmit motion to the filter belt assembly are welded to the drive shaft.
The drive shaft and sprockets shall be constructed from type 304 stainless
steel.
D. Screen Cleaning System
1. In addition to the normal interaction of the filter elements, the Screen
Cleaning System cleans and renews the screen in 3 additional ways:
a. The Screen Belt Spray System.
b. The Belt Geometry and repositioned brush.
C. The Brush Assembly
2. The screen belt spray system consists of two (2) optimally positioned
stainless steel spray bars with turn quick release spray nozzles. The
turn makes unplugging nozzles quick and easy with access provided thru
the covers. Water usage is 70 gpm at 40 psi but can be very effective at
low flows, pending site requirements.
3. Solenoid Valves(s). The system will be actuated by one 120 Volt, single
phase, 60 Hz normally closed solenoid valve(s). Valve(s) will consist of a
brass body with a 2 inch NPT pipe connection. Electrical housing will be
rated NEMA 8 with a 2 inch conduit connection.
4. Contractor will provide and locate manual shut off valves and pressure
gauges for each spray bar after the solenoid valve.
5. The Belt Geometry increases the self-cleaning action of elements and
positions the screen belt for optimal cleaning by the combination of the
brush and spray wash system.
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6. The brush assembly is of hybrid construction that limits stringy solids from
wrapping around the brush shaft and extends its effective life. The bristles
are longer and make full penetration of the element shank for positive
cleaning of the filter belt. The brush is driven by an independent drive
system.
7. A side mounted door provides access for replacing the brush without
reaching into the unit by more than 6 inches. Designs that require reaching
into the machine beyond 6 inches to change the brush are prohibited.
Changing of the brush is accomplished in under 10 minutes by sliding the
solid core brush from the cantilevered drive shaft.
E. Brush Drive Assembly
1. The drive assembly consists of a gear reducer, motor, and brush shaft.
The drive mechanism shall be protected from the trash stream to ensure
that the brush runs smoothly.
2. The gear reducer is of hollow shaft design, mounted directly to the unit
external to the side frame and connected directly to the brush shaft with a
keyless tapered bushing. The reducer shall be designed in accordance
with AGMA recommendations for Class II service based on the required
horsepower for operation.
3. The motor shall be a squirrel cage induction motor, TEFC, 230/460 volt, 3-
phase, 60 Hz, 1800 RPM. The motor Horsepower shall be 0.5. Motor shall
be acceptable for use in a Class 1, Division 2 environment in accordance
with paragraph 501-8(b) of the National Electrical Code.
4. Overload protection shall be provided by an electrical overload device that
senses motor current draw (SSAC Current Monitor or equal)
5. The brush drive shaft shall be of a cantilevered design. In the installed
position, it shall be supported at each end by the hollow shaft reducer and
eccentric bearing. The entire mechanism will be adjustable via jacking
screws to achieve brush removal and replacement.
F. Discharge Chute
1. A discharge chute shall be provided integral to the machine, constructed
from 14-gauge type 304 stainless steel and designed to direct the
screenings to the collection equipment below.
2. The chute shall have a 1/4-inch-thick flange that shall allow it to be
connected to ancillary washing, compacting, and collection equipment.
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G. Heat Tracing For Discharge Chute
A discharge chute heater shall be supplied as an integral part of the
screen to prevent ice and screenings buildup. Electrical power will be
supplied from the local power panel.
2. The discharge chute shall be insulated on the downstream side with
one -inch thick semi -rigid fiber insulation board capable of withstanding
temperatures from -60 to 450 degrees F. The insulating material shall
have a density of not less than 3.0 lbs./cubic feet and shall have a foil
vapor barrier attached to one side.
3. The heating element shall consist of a self-limiting cable rated 10 watts
per foot at 120 volt AC. The buss wires shall be 16AWG copper inside a
semi -conductive polymer matrix. The cable shall be jacketed with a
flame retardant and water-resistant insulating thermoplastic rubber
material.
4. The heating element and insulation system shall be covered with a
minimum 14-gauge type 304 stainless steel metal sheeting, gaskets and
sealed against moisture.
The entire system shall contain U.L. listed components.
H. Lubrication
Lubrication lines shall be extended from each bearing housing to a
central point located on the respective side of the machine, accessible
from the operating floor for ease of maintenance.
Electrical Devices
Interconnecting conduit and wiring shall be the responsibility of the
Contractor.
2. Differential Level System: One (1) controller (NEMA 8) and two (2)
ultrasonic probes (upstream & downstream).
3. Float Switch: A mercury type float switch of chemical resistant
polypropylene construction will be provided with a 316 SST pipe
mounting bracket, float mounting clamp and expansion anchors. The
mounting bracket requires a suitable length of 1" nominal pipe to suspend
the float in the channel, to be supplied by others. The float will have a 20-
foot long integral cable.
4. Emergency Stop Local Push Button Station: A NEMA 4X polycarbonate
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2.3
10
emergency stop push button station will be mounted to the frame of the
unit with a 1/2 inch NPT conduit connection.
5. Solenoid Valves: One (1) 120 volt, single phase, 60 Hz solenoid valve for
the wash water system housed in NEMA 8 enclosure.
WASHER COMPACTOR EQUIPMENT
General
The discharge chute/tube shall have the approximate dimensions shown
on the drawings and be installed at an angle required by the
manufacturer to meet the discharge height and location requirement.
2. The washer/compactor system described herein is based upon a certain
type of equipment.
3. The washer/compactor system shall be designed to receive unwashed
screenings from the new element screens. The system shall wash,
dewater, compact, and convey the material to a storage dumpster
provided by the Owner.
4. The washer/compactor system shall be designed to permit disassembly
and re -assembly of all pieces that must be removed to service the
system.
5. The washer/compactor system shall be capable of receiving a
continuous flow of screenings debris.
6. Spray nozzles shall be removable or accessible from outside for
maintenance purposes.
7. Design and provide supports and anchorage in accordance with the
provisions of the latest edition of Uniform Building Code (UBC).
8. Moisture Content: Dewater material to minimum 30 percent solids, and
low enough to pass EPA paint filter test.
9. Screw shall be accessible through removable trough covers along entire
length during shutdown only.
10. To minimize odors and nuisance, the conveyance, dewatering and
compaction zones shall be completely enclosed.
11. The spray wash system shall be enclosed such that spray water,
aerosols or leakage do not contaminate the operating floor.
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12. Compacted screenings shall be discharged from the unit through a Type
304 stainless steel discharge chute/tube. The chute/tube shall begin with
a long radius elbow and then extend to the discharge point while slightly
increasing in size. The chute/tube shall have the approximate
dimensions shown on the drawings and be installed at an angle required
by the manufacturer to meet the discharge height and location
requirement.
B. Performance
1. Maximum Screenings Capacity........................Manufacturer to specify
2. Maximum Moisture Content of Dewatered Screenings ...................65%
3. Configuration: ................................................................................... Push
4. Overall Length(Approx.): .................................................... See drawings
5. Angle of Inclination: ............................................................... 0-5 degrees
6. Spiral OD:.................................................................. 259 mm (minimum)
7. Spiral Pitch: .............................. 150 mm (Trough), 120mm (Compaction)
8. Inner Flight: ..................................................................... 25 mm x 10 mm
9. Outer Flight: .................................................................... 50 mm x 20 mm
10. Wear Liner / Bar Thickness ........................................... 6 mm (minimum)
11. Trough Thickness: ........................................................................... 11 ga
12. Cover Thickness: ............................................................................. 14 ga
13. Number of Inlets: .................................................................................... 1
14. Number of Outlets: ................................................................................. 1
C. Spiral: The shafted spiral will be constructed of stainless steel or abrasion
resistant, high strength carbon steel and prime coated for protection during
shipment. The spiral will be 7.7 inches OD (minimum), will have 0.25-inch-thick
(minimum) flights and will have a replaceable 0.25-inch-wide nylon brush with
type 304 stainless steel casing attached with bolted clips to the spiral OD
throughout the inlet area to scour the perforated sheet. Nylon brushes may be
substituted with leather wiper blades bolted to the screw flights.
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D. Trough: The press body will consist of an inner trough, an outer trough and an
inlet area. The press body will be constructed of type 304L stainless steel for all
welded components and type 304 stainless steel for all non -welded covers.
Press bodies must be fabricated with "L" grade stainless steels, which will
minimize corrosion in the weld heat affected zone.
Inner Trough: The press inner trough will be constructed of 0.25-inch thick
stainless steel in the washing and pressing barrel with 0.19 to 0.24 inch -
diameter holes chamfered to 0.38-inch diameter on the outside. The unit
will have minimum four (4) 0.25-inch-thick by 1.50-inch-wide replaceable
wear bars with 400 Brinnel hardness.
2. Outer Trough: The outer trough will be constructed from 10 gauge (0.13")
thick type 304L stainless steel, will receive free liquid from the washed
solids and will direct the flow to a 3.5-inch (minimum) OD drain tube.
3. Inlet Area: An inlet area will be constructed of 12 gauge (0.11 inch) thick
stainless steel with 0.25-inch (maximum) diameter perforations and will
receive incoming materials.
E. Wash Spray Zone: The wash zone will include a spray wash system to wash
organic residue from the screenings. The wash zone spray will consist of three
(3) washing zones (trough, press, and drain) utilizing two (2) solenoid valves.
The solenoid valve body will be of brass construction with Buna seals. The ball
valve will be of brass construction with a stainless steel ball. The system will
have a minimum washwater requirement of 10 GPM at 60 psi. The spray
connection will be 1 inch NPT. Systems utilizing combined (trough and drain)
washing systems will also be accepted.
F. Outer Trough Flush Spray: The press will include a single point spray wash
system to flush organic residue trapped in the outer trough. The flushing spray
will consist of one (1) spray header, one (1) ball valve and one (1) solenoid
valve. The solenoid valve body will be of brass construction with Buna seals.
The ball valve will be of brass construction with a stainless steel ball. The
system will have an output of 15 GPM at 60 psi. The spray connection will be
1/2-inch NPT.
G. Discharge Piping: A minimum 14 gauge, type 304L stainless steel discharge
pipe will be fitted to the press to direct screenings into dumpster provide by the
Owner. All discharge pipe flanges will be 304L stainless steel. Aluminum
flanges will not be allowed. Pipe supports shall be supplied by the
manufacturer.
H. Transition Inlet Chute/Guard: A 12 gauge type 304L stainless steel transition
inlet chute/guard will be supplied to direct materials into the inlet feed area. The
March 2024 Project # 21.01123 462157 - Page 15

chute/guard will be flange bolted to the trough with each side a minimum 60
degrees from horizontal. The inlet clutch/ guard shall extend to the discharge
from the screen. A 14 gauge hinged F gasketed access door covering a 1'x1'
opening shall also be provided.
I. Fasteners: All fasteners will be 316 stainless steel.
J. Finishes:
1. All welded stainless steel subassemblies will be free from welding
discoloration and will have a 2B finish.
2. The motor and gear reducer shall have the standard manufacturer's finish.
The spiral and drive shaft will be prime coated carbon steel.
1. Provide squirrel -cage ac induction motors meeting requirements of NEMA
MG 1
2. Service Factor of 1.15
3. Insulation: Class F with Class B rise at nameplate horsepower and
designated operating conditions
4. The motors shall meet the following specific requirements:
a. Motor Horsepower: 3.0 HP (maximum), 460 V, 3 phase, 60 Hz, 94
percent minimum efficiency
b. Application: Constant Speed, dual voltage, reversing
C. Enclosure Type: Class I, Division 1, Group D; suitable for indoor or
outdoor installation in severe -duty applications including high
humidity, chemical (corrosive), or dirty atmospheres.
L. Electrical Devices:
1. Interconnecting conduit and wiring shall be the responsibility of the
Contractor.
2. Solenoid Valves: Two (2) 120 volt, single phase, 60 Hz solenoid valves
for the wash zone and flush spray washes housed in NEMA 8
enclosures.
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3. Emergency Stop Local Push Button Station: A NEMA 8 polycarbonate
emergency stop push button shall be mounted to the end flange with a
1/2 inch NPT conduit connection.
2.4 ELECTRICAL CONTROLS AND DEVICES
A. Main Control Panel
A NEMA rated 4X stainless steel control panel shall be provided by
the screen manufacturer to control the following components:
a. One (1) element screen
b. One (1) washer compactor
2. In accordance with general control requirements and component
qualities as follows:
NEMA 250
Panel No.
Name
Rating
Material
Mounting
10-LCP-01
Screening
4X
Type 316
Rack
Control Panel
Stainless Steel
Mounted
3. Variable Frequency Drives:
a. Variable frequency drives (VFDs) shall be provided for the
screen drives and the brush drives as indicated on the
drawings. VFDs shall be properly sized for the motor
application.
b. Provide drives from one of the following manufacturers:
1) ABB
2) Danfoss Inc
3) Eaton
4) Nidec Motor Corporation
5) Rock Automation
6) Schneider Electric
7) Siemens
C. VFD shall be solid state AC to AC inverter -controlled device
utilizing the latest isolated gate bipolar transistor (IGBT)
technology.
4. Combination Full Voltage Reversing Motor Starters:
a. Combination full voltage reversing motor starters shall be
provided for the washer/compactor drive.
b. Factory assembled, combination full -voltage magnetic motor
March 2024 Project # 21.01123 462157 - Page 17

controller consisting of the controller, disconnecting means,
SCPD and OCPD, in a single enclosure.
C. Provide drives from one of the following manufacturers:
1) ABB
2) Eaton
3) Rockwell Automation
4) Schneider Electric
5) Siemens
d. Thermal overload relays with inverse -time -current
characteristics and class 10 trip characteristics.
e. Fusible disconnecting means.
5. Uninterruptible Power Supply:
a. Each control panel shall contain an uninterruptible power
supply (UPS) sized to power the controls for 90 minutes.
b. UPS shall be of the Double Conversion IGBT type.
C. Minimum 97% efficiency at full load and minimum 94%
efficiency at 50% load.
d. Static bypass transfer switch shall transfer load to normal AC
supply terminals without circuit interruption in the event of
UPS failure.
6. Programmable Logic Controller:
a. Control panel shall contain a programmable logic controller
(PLC) with Ethernet port and required 10 space as shown on
drawings.
7. Control Power: Each control panel shall contain a 480-120V control
transformer sized sufficient to provide 125% of required control
power.
8. Main Circuit Breaker: Each control panel shall contain a main circuit
breaker sized properly per the NEC (2023) which will de -energize
the entire panel when actuated. The main circuit breaker shall be
accessible to the operator without exposure to live parts and shall
be rated NEMA 4X.
9. Branch Circuit Breaker: Each control panel shall contain a circuit
breaker sized properly per the NEC (2023) for each blower
controlled by the panel. Branch circuit breakers protecting blowers
shall be accessible to the operator without exposure to live parts.
10. Operator Devices:
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a. 22mm diameter, NEMA 4X.
b. General:
1)
Power On (White Light)
2)
General E-Stop (Red Mushroom Button)
3)
General Alarm (Red Light)
4)
General Reset (Black Push -Button)
C. Equipment
Status:
1)
Running (Green Light)
2)
Fault (Red Light)
3)
Alarm (Red Light)
4)
Washing Solenoid Valve Open (Green Light)
5)
High Water Level (Amber Light)
d. Equipment
Manual Controls:
1)
Hand / Off / Auto Switches (Each Screen Drive, each
Brush Drive, & Washer / Compactor). When operating
equipment in `Hand' mode, all automatic operations of
the equipment are deactivated.
2)
Forward / Off / Reverse Switches (Screenings
Conveyer & Washer / Compactor) with c/w spring
loaded return to `Off' position. Actuation of this switch
will only provide power to the motor as long as
operator holds switch in place AND as long as Hand /
Off / Auto switch is in the `Off' position.
11. Control panel shall be pre -assembled and pre -wired to identified
terminal blocks and shall contain all additional required accessories
to make the control panel function as intended per specifications
and drawings.
B. Local Components
The scope of supply shall include the following field mounted components:
a. One (1) Screen Wash solenoid valve
b. One (1) H.W.L. "High Water Level" float switch
C. One (1) Differential level system with one (1) controller (NEMA 8)
and two (2) ultrasonic probes. — per screen
o Ultrasonic level transmitter - 10-LDIT-0301
o Upstream Level Element- 10-LE-0301A
o Downstream Level Element- 10-LE-0301 B
d. One (1) compactor wash zone solenoid valve
e. One (1) compactor flush zone solenoid valve
f. One (1) Low Pressure Switch on wash water line to screen - 10-PSL-
1501
C. Mechanical Screen Control Strategy
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Automatic Mode
During all automatic operation, when a start signal is received for the
screen, the brush motor shall start 3 seconds before the elements motor
shall start. Both the elements and brush motors shall remain in operation
during the automatic sequences and shall stop simultaneously at the end
of the automatic sequences. Elements motor shall be able to operate at
different speeds to accommodate real-time hydraulic conditions.
a. "STEPPING" sequence
When a high water differential level is be detected (normally pre-set at 8.0
in [200 mm]), the screen shall start and run for a preset time then stop.
When the screen receives the next high differential signal, it shall run for
the same preset time. This sequence shall be repeated several times
(depending on the water level and number of elements) in order to reduce
energy consumption and operating cost. The solenoid valve shall not open
during this period.
After a preset number of high differential signals (steps), the system shall
start a cleaning cycle.
b. "HIGH WATER LEVEL" sequence
This circuit shall override all other start signals. The HWL signal shall make
all motors of the screen run continuously. This circuit shall also switch the
perforated elements drive motor on high speed during the full HWL
condition duration. Once the water level drops below the high level set
point, the system shall start a cleaning cycle. Levels set to suit site
conditions.
C. "TIMED" sequence
When the adjustable clock gives a start signal, the screen shall start a
cleaning cycle.
"Cleaning cycle": This timed cycle shall allow for a complete revolution of
the perforated elements around the two axes to clean the elements. The
element backwash solenoid valve shall open whenever the screen runs on
a cleaning cycle. The cleaning cycle can also be triggered with the manual
operators.
2. Hand Mode
The equipment components can be operated manually using the control
panel operators on the control panel.
3. Thermal Protection
The overload protection circuit shall cut the power off to the motor and to
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the control circuit of the motor starter, should the following conditions
occur:
a. Overheat of the motor
b. Short circuiting
C. Loss of phase
The overload protection shall be sized according to the motor nameplate
full load rating. Upon detection of an overload, the dedicated motor shall
stop and the "Motor Fault" alarm indicator light shall be activated. The
protection circuit shall be reset manually inside the control panel. The
control system shall be reset manually by a push button.
4. Jammina Protection (elements motor on
A current metering system (CMR) integrated in the VFD shall protect the
equipment component against jamming. A continuous current reading
(CMT) shall be monitored by an adjustable relay (CMR).
The motor starting current being higher than the setting of the CMR, the
jamming protection shall be put out of service by a time delay (TCM), for a
predetermined adjustable motor start period, long enough to allow the
current to fall below the CMR setting when it reaches its normal full load
level.
Upon detection of an over current, the dedicated motor shall automatically
stop and the associated "Motor Fault" alarm indicator light shall be
activated. The control system shall be reset manually by a push button.
D. Washer Compactor Strategy
1. Automatic Mode
The equipment will automatically start simultaneously with the upstream
equipment.
a. "Compacting cycle": After the upstream equipment has stopped, the
compactor shall keep running to allow for complete material
evacuation from the inlet zone. The compacting cycle duration shall
be field adjustable. The compacting cycle can also be triggered with
the manual operators.
b. "Jamming cycle": Should the power requirement of the compacting
process exceed the preset point on the current monitor relay, an
overload protection system shall automatically reverse the rotation of
the screw for a short time. Forward rotation is re-established,
restoring the original compaction cycle. If the first reverse cycle
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clears the screw, the compactor will then finish its cycle normally.
Should the first reverse cycle be unsuccessful, it shall be repeated as
necessary or up to at least five times to eliminate the blockage. In the event
of a blockage that cannot be eliminated, the unit will then trip on over
current, an alarm light will be lit and the compactor will be turned off.
2. Hand Mode
The equipment components can be operated manually using the control
panel operators on the control panel.
3. Thermal Protection
The overload protection circuit shall cut the power off to the motor and to
the control circuit of the motor starter, should the following conditions
occur:
a. Overheat of the motor
b. Short circuiting
C. Loss of phase
The overload protection shall be sized according to the motor nameplate
full load rating. Upon detection of an over load, the dedicated motor shall
stop and the "Motor Fault" alarm indicator light shall be activated. The
protection circuit shall be reset manually inside the control panel. The
control system shall be reset manually by a push button.
4. Jamming Protection
A current metering system (CMR) integrated in the VFD shall protect the
equipment component against jamming. A continuous current reading
(CMT) shall be monitored by an adjustable relay (CMR).
The motor starting current being higher than the setting of the CMR, the
jamming protection shall be put out of service by a time delay (TCM), for a
predetermined adjustable motor start period, long enough to allow the
current to fall below the CMR setting when it reaches its normal full load
level.
Upon detection of an over current, the dedicated motor shall automatically
stop and the associated "Motor Fault" alarm indicator light shall be
activated. The control system shall be reset manually by a push button.
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2.5 ACCESSORIES
A. Unit Heat Tracing: All exposed water piping and appurtenances shall be heat
traced by the Contractor, while the discharge piping for the washer compactor
unit shall be heat traced by the Manufacturer using 10 watt per foot, self-
regulating heating cable, 3/4 to 1-1/2 inch thick closed cell foam insulation, and
a 20 gauge Type 304 stainless steel jacket. A NEMA 8 ambient sensing control
thermostat will be mounted to the discharge section, will be preset for 40' F, and
will have a 3/4 inch NPT conduit connection. Electrical power will be supplied
from the local power panel.
B. Anchor Bolts: All anchor bolts and other hardware shall be Type 316 stainless
steel and be provided by the equipment manufacturer.
2.6 PROTECTIVE COATINGS
A. All gearboxes and motors will have manufacturer's standard machinery paint
finish, to be top coated with final coatings as per Specification 099000 of these
specifications. Manufacturer to verify compatibility of coatings.
B. Stainless steel surfaces shall not be painted.
C. The manufacturer shall provide a heavy duty fabricated steel support stand, hot
dipped galvanized, and 304 stainless steel anchorage for mounting the control
panel near the screen.
PART 3 - EXECUTION
3.1 PREPARATION
A. The mounting points of the channel shall be level and parallel and of proper size.
B. Contractor shall verify all dimension in the field to ensure compliance of
equipment dimensions with the drawings.
3.2 INSTALLATION
A. The screening system shall be installed in strict accordance with the drawings,
specifications, and manufacturer's recommendations.
B. Lubrication: Lubricants of the type recommended by the equipment manufacturer
shall be furnished and applied by the Contractor. The Contractor shall certify that
necessary components have received the proper amount of recommended
lubricant.
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3.3 START UP/TRAINING/FIELD QUALITY CONTROL
A. QUALITY CONTROL: The installation, alignment, and testing shall be checked and
approved by a factory representative before acceptance.
1. The Contractor shall include in his bid the services of a factory trained
representative for a period of one (1) trips, each being two (2) days. The
manufacturer's representative shall inspect the completed installation,
and assist the Contractor in aligning, start-up and testing. The
representative shall also instruct plant personnel in the operation and
maintenance of equipment.
2. A written report shall be furnished by the equipment manufacturer and
shall describe the representative's observations. The report shall describe
in detail any deficiencies noted. All such deficiencies, whether by the
manufacturer or Contractor, shall be corrected at no expense to the
Owner.
3. Prior to final approval, the manufacturer shall submit a letter certifying that
the installation meets all requirements of the manufacturer.
B. FIELD TESTING: The manufacturer shall demonstrate to the Owner and
Engineer that the screen cleaning mechanism effectively removes debris from
the screen and that all electrical and mechanical equipment functions as
intended.
C. Operator Training: Provide operator training for owner's personnel after the
system is operational. Training shall take place while manufacturer's
representative is at the job site for equipment inspection.
3.4 SPARE PARTS
A. The Contractor shall furnish one (1) complete set of recommended spare
parts for each screen. All spare parts are to be conveyed to the Owner.
Minimum spare parts are:
1. Twenty (20) Filter elements.
2. Ten (10) Side plates.
3. Twenty (20) Snap rings 3/4" diameter.
4. Ten (10) Snap rings 63/64" diameter.
5. One (1) rotating brush.
END OF SECTION 462153
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SECTION 466656
PART 1 — GENERAL
1.1. DESCRIPTION
OPEN CHANNEL
ULTRAVIOLET TREATMENT EQUIPMENT
A. Scope: Furnish all labor, materials, equipment, and appurtenances required to
provide an open -channel, gravity -flow, and low-pressure high -intensity ultraviolet
lamp (UV) disinfection system complete with an automatic chemical/mechanical
cleaning system and variable output lamp drivers. The UV system shall be
complete and operational with all control equipment and accessories as shown
and specified herein. This system will be capable of disinfecting effluent to meet
the water quality standards listed in this section.
1.2. QUALITY ASSURANCE
A. Pre -qualification Requirements: Any alternate UV manufacturer that is not
named or listed as approved equal must submit the following 14 days prior to bid
to be considered for approval:
The manufacturer will be regularly engaged in the design, manufacture,
and servicing of UV systems for municipal wastewater disinfection.
Manufacturer to submit evidence of a proven track record with at least 5
staggered, inclined Low Pressure High Intensity (LPHI) systems of 5 MGD
or greater capacity, installed and operating in the United States. These
systems must have been in operation for 48 months. Contact names,
phone numbers, addresses, and brief project descriptions shall be
included.
2. The manufacturer will provide documentation of previous experience with
municipal UV disinfection systems in wastewater applications with variable
output electronic drivers and automatic cleaning systems.
3. For evaluation, the manufacturer will submit a reactor (bioassay) validation
report and calculation justifying the sizing for the proposed reactor, without
exception. The bioassay will have been completed by an independent third
party and have followed applicable sections and protocols described in the
NWRI Ultraviolet Disinfection Guidelines for Drinking Water and Water
Reuse (2012) and 2006 USEPA Ultraviolet Disinfection Guidance Manual
(UVDGM). The bioassay must demonstrate that the proposed UV system
design and number of lamps will deliver the specified Reduction Equivalent
Dose (RED) based on the water quality and operating conditions specified
herein.
January 2024 Project # 21.01123 466656 - Pagel

4. Independent certification of the lamp aging factor must be submitted if
values other than the specified default values are being proposed. The
lamp aging (or end -of -lamp -life) factor must be determined using the
protocol described in the NWRI Ultraviolet Disinfection Guidelines for
Drinking Water and Water Reuse (2012).
5. Independent certification of the fouling factor shall only be accepted if
performed on the UV lamp and quartz sleeve combination equal to that
being proposed by the UV manufacturer. The fouling factor must be
conducted on municipal wastewater effluent using the protocol described
in the NWRI Ultraviolet Disinfection Guidelines for Drinking Water and
Water Reuse (2012).
6. Documentation of UV manufacturer's service capabilities including location
and experience.
7. Sample of lifetime disinfection performance guarantee including scope and
duration of guarantee.
8. Pre -qualification submittals from manufacturers will include a complete and
detailed proposal of equipment offered, including the number of lamps
proposed, bioassay calculation and a detailed description of all exceptions
taken to the specification.
B. Design Criteria:
1. The basis of design in this section is the product of Trojan Technologies
(London, Ontario). Systems manufactured by Wedeco Inc., and others may
be considered as approved equal.
2. Provide equipment that will disinfect effluent with the following
characteristics:
a. Peak Flow: 14.62 MGD
b. Average Flow: 1.7 MGD
C. Total Suspended Solids: 5 mg/L, 30-Day average
grab samples
d. Effluent Temperature Range: 33 to 85 °F (1 to 30 °C)
e. Ultraviolet Transmittance @ 253.7 nm: 65%, minimum
f. Effluent standards to be achieved:
200 Fecal Coliform/100 ml based on a 30-day Geometric Mean of
daily samples for the effluent standard as specified in a) through e).
Effluent standards will be guaranteed regardless of influent count to
UV system.
January 2024 Project # 21.01123 466656 - Page 2

14
3. The UV system is to be installed in 2 open channel(s) having the
following dimensions (not including the water level controller):
a. Length: As indicated on the Contract Drawings
b. Width: As indicated on the Contract Drawings
C. Depth: As indicated on the Contract Drawings
4. System shall be capable of increasing treatment capacity from 14.62
MGD to an anticipated future peak flow of 18.80 MGD through the
addition of one (1) additional lamp module per channel.
a. Channels shall be sized to pass the anticipated future peak flow
while maintaining the required freeboard and lamp submergence.
5. The maximum effluent depth in the channel will be as indicated on the
Contract Drawings.
6. System configuration:
a. The UV system must fit within the UV channel(s) as stated without
modification.
b. The UV system configuration will be as follows:
1)
Number of Channels:
2
2)
Number of Banks per Channel:
3 (2 Duty, 1
Redundant)
3)
Lamps per Bank:
10
4)
Total Number of Lamps in the UV System:
60
5)
Maximum Duty Power Draw:
42.1 kW
6)
Number of System Control Centers:
1
7)
Number of System Controllers:
1
8)
Number of UV Sensors:
1 per bank
9)
Number of Power Distribution Centers:
2
10)
Number of Level Controller Weirs:
2
C. Future
flow (18.80 MGD) shall be treatable to the
same standard
through the addition of one (1) additional bank per channel.
Performance Requirements:
1. Provide a UV disinfection system complete with UV Banks and lifting
mechanism, System Control Center, Power Distribution Centers, and
Water Level Controller(s) as shown on the contract drawings and as herein
specified.
2. The ultraviolet disinfection system will produce an effluent conforming to
the following discharge permit: 200 Fecal Coliform/100 ml, based on a 30-
January 2024 Project # 21.01123 466656 - Page 3

day Geometric Mean. Grab samples will be taken in accordance with the
Microbiology Sampling Techniques found in Standard Methods for the
Examination of Water and Wastewater, 21St Ed.
3. The UV system will be designed to deliver a minimum MS2 RED of 30
mJ/cm2 at peak flow, in effluent with a UV Transmission of 65% at end of
lamp life (EOLL) after reductions for quartz sleeve fouling. The basis for
evaluating the RED will be the independent third -party bioassay, without
exception. Bioassay validation methodology to follow applicable protocols
described in NWRI Ultraviolet Disinfection Guidelines for Drinking Water
and Water Reuse (May 2003, 2012) and 2006 USEPA UVDGM. The dose
validation should utilize RED based on MS2 indicator organism bioassay.
4. The UV dose will be adjusted using an end of lamp life factor of 0.5 to
compensate for lamp output reduction over the time period corresponding
to the manufacturer's lamp warranty. The use of a higher lamp aging factor
will be considered only upon review and approval of independent third
party verified data that has been collected and analysed in accordance with
protocols described in the NWRI Ultraviolet Disinfection Guidelines for
Drinking Water and Water Reuse (May 2003, 2012).
5. The UV dose will be adjusted using a quartz sleeve fouling factor of 0.8 to
compensate for quartz sleeve transmission reduction due to wastewater
effluent fouling. The use of a higher quartz sleeve fouling factor will be
considered only upon review and approval of independently verified data
that has been collected and analysed in accordance with protocols
described in the NWRI Ultraviolet Disinfection Guidelines for Drinking
Water and Water Reuse (May 2003, 2012). The data recorded for the
determination of the validated fouling factor must be obtained by testing in
secondary wastewater effluent utilizing the same lamp, quartz sleeve, and
cleaning system proposed by the UV manufacturer.
6. Independent validation for use of higher factors (lamp aging and sleeve
fouling) must be submitted to the Engineer for consideration a minimum of
14 days prior to bid. The independent validation shall have oversight by a
qualified registered professional engineer with knowledge and experience
in testing and evaluation of UV systems as defined in the EPA UVDGM
(Appendix C, Section C.3.3)
7. The system will be designed for complete outdoor installation.
1.3. SUBMITTALS
A. Complete submittal drawings and information shall be submitted in accordance
with Section 013300 —SUBMITTAL PROCEDURES.
January 2024 Project # 21.01123 466656 - Page 4

B. Submit for review, shop drawings showing the following:
1. Complete description in sufficient detail to permit an item comparison with
the specification.
2. Dimensions and installation requirements.
3. Descriptive information including catalogue cuts and manufacturers'
specifications for major components.
4. Electrical schematics and layouts.
5. Hydraulic calculations demonstrating compliance with the required
hydraulic characteristics.
6. Independent bioassay validation and dosage calculations demonstrating
compliance with the specified UV dose requirements.
7. Lifetime disinfection performance guarantee.
8. Operations and Maintenance (O&M) Manual
9. Performance Testing Results
1.4. LAYOUT COORDINATION AND REVIEW
A. The Contractor shall review design and layout drawings to ensure that installation
arrangements are suitable for the specified equipment. Any potential conflicts or
recommended modifications shall be coordinated with the Engineer and noted
on the shop drawings or by a pre -submittal request for information, if appropriate.
1.5. OPERATING INSTRUCTIONS
A. The Manufacturer shall furnish operation and maintenance manuals consistent
with the requirements of Section 017823 — Operations and Maintenance Data.
The manuals shall be prepared specifically for this installation and shall include
all required catalog cuts, drawings, equipment lists, descriptions and other
information that is required to instruct operation and maintenance personnel
unfamiliar with such equipment.
1.6. PRODUCT STORAGE AND PROTECTION
A. The Contractor shall be responsible for protection and storage in accordance
with the Manufacturer's recommendations of all items shipped to the site from
the time of delivery until installation is completed and the units and equipment
are ready for operation.
January 2024 Project # 21.01123 466656 - Page 5

1.7. WARRANTY
A. Equipment: The equipment furnished under this section will be free of defects in
material and workmanship, including damages that may be incurred during
shipping for a period of 12 months from date of start-up or 18 months after
shipment, whichever comes first.
B. UV Lamps: The UV lamps will be warranted for a minimum of 15,000 hours when
operated in automatic mode, prorated after 9,000 hours. On/off cycles are limited
to an average of four per day accumulated over the guaranteed life of the lamp.
C. Lamp Drivers: Lamp drivers will be warranted for 10 years from UV system start-
up/acceptance, prorated after one year.
D. Quartz sleeves shall be warranted for a minimum of 10 years from UV system
start-up/acceptance. The full replacement of quartz sleeves does not apply if the
failures can be shown to be no fault of the manufacturer or if they are a result of
the system not being operated in accordance with the UVSS operation and
maintenance manual.
E. UV Intensity Sensors: UV Intensity Sensors will be warranted for five years from
UV system start-up/acceptance, prorated after 1 year.
PART 2 PRODUCTS
2.1. MANUFACTURER
A. The physical layout of the system shown on the contract drawings and the
equipment specified herein are based on the TrojanUVSignaTM, as manufactured
by Trojan Technologies, London, Ontario, Canada.
B. If other equipment is proposed, the Contractor will demonstrate to the Engineer
and the Owner that all requirements of materials, performance, and workmanship
have been met or exceeded by the equipment proposed. Contractors proposing
alternate manufacturers will be responsible for all costs associated with system
evaluation and redesign including all electrical, mechanical, and civil aspects of
the installation.
2.2. DESIGN, CONSTRUCTION AND MATERIALS
A. General:
1. All UV Bank metal components in contact with effluent will be Type 316
stainless steel.
January 2024 Project # 21.01123 466656 - Page 6

2. All metal components above the effluent will be Type 304 stainless steel
with the exception of the ballast enclosure, which is constructed of
anodized aluminum.
3. All wiring exposed to UV light will be Teflon TM coated. All wires connecting
the lamps to the ballasts will be enclosed inside the frame of the UV module
and not exposed to the effluent.
B. Lamp Array Configuration:
1. The lamp array configuration will be in a staggered inclined arrangement.
2. The system will be designed for complete submersion of the UV lamps
under all flow conditions including both electrodes and the full length of the
lamp arc.
3. To maximize performance and ensure safety, bank light locks will be used
in each bank to prevent potential short circuiting over the top of the lamps.
4. For any UV inclined system that does not contain UV bank light locks to
prevent short circuiting, the system shall be supplied with 1 additional UV
bank to compensate for short-circuiting over the top of the lamps.
C. UV Bank:
1. Each UV bank will consist of UV lamps, quartz sleeves, and an automatic
chemical/mechanical cleaning system mounted in a Type 316 stainless
steel frame.
2. Each lamp will be enclosed in its individual quartz sleeve, one end of which
will be closed and the other end sealed by a lamp end seal. To be
considered as an alternate, lamp quartz sleeves that are open at both ends
will be supplied with twice the amount of specified spare seals and lamps.
3. The closed end of the quartz sleeve will be held in place by a retaining 0-
ring. The quartz sleeve will not come in contact with any steel in the frame.
4. Each UV bank will contain a pre -formed Type 316 stainless steel wall on
each side to prevent possible short-circuiting at the side walls of the
reactor.
5. Each UV bank will contain light locks at the top of the bank to prevent short
circuiting over the top of the lamps and maximize disinfection efficiency.
6. Each UV bank will be rated Type 6P. UV banks that are not Type 6P rated
are not acceptable.
January 2024 Project # 21.01123 466656 - Page 7

7. To minimize maintenance, equipment must be provided by the UV
manufacturer to enable lifting a complete bank of lamps from the channel
at once for inspection and/or servicing.
D. UV Lamps:
1. Lamps will be high -intensity low-pressure amalgam design. Lamps that are
not amalgam will not be allowed.
2. The filament shall be significantly rugged to withstand shock and vibration.
3. Electrical connections for the lamp will consist of four pins at one end of
the lamp only. Lamp wiring shall be Teflon -insulated stranded wire.
4. Lamps without maintenance coating or that do not have four (4) pins are
considered instant start. To be considered as an alternate, instant start
lamp systems will supply replacement spare lamps equal to 50% of the
total number of lamps in the system.
5. The lamp shall withstand an average of four (4) on/off cycles per day
without reducing lamp life, warranty, or causing any damage to the lamp.
6. Lamps will be operated by electronic lamp drivers with variable output
capabilities ranging from 30% to 100% of nominal power. The lamp
assembly shall incorporate active filament heating to maintain a minimum
lamp efficiency of 35% across varying water temperatures and between
the minimum and maximum stated lamp power levels.
E. Lamp Plugs:
1. Each lamp plug will be accessible from the top of the UV bank to facilitate
lamp removal without moving the UV banks or any other components.
2. Each lamp plug shall have provisions for a light emitting diode (LED) visual
indicator that indicates on/off status for each lamp.
3. An integral safety interlock in the lamp plug will prevent removal of
energized lamps.
4. The lamp plug shall be rated Type 6P.
F. Lamp Drivers:
1. Each lamp driver will independently power two UV lamps. Failure of one
lamp will not affect operation of the other lamp.
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2. The lamp driver will have a power factor correction circuit to ensure
minimum 99% power factor and less than 5% total harmonic distortion
(THD) current at the maximum power level and nominal input voltage.
3. The lamp driver electrical efficiency will be minimum 95% at the maximum
power level.
4. The lamp driver will be programmed -start type utilizing filament preheat
followed by a high voltage pulse to ignite the lamp.
5. During lamp operation, variable filament heating current shall be provided
according to a predetermined curve to maintain optimum filament
temperature and amalgam temperature to ensure maximum lamp life and
maintain a minimum lamp efficiency of 35% across varying water
temperatures and between the minimum and maximum stated lamp power
levels.
6. A ground fault in the output circuit shall be detected and communicated as
a warning to the external controls system while the corresponding lamp
operates undisturbed.
7. The communication protocol shall be Modbus implemented on an RS485
electrical interface.
8. Local visual diagnostic will be provided with LEDs for lamp driver status,
lamp status (on, idle, preheat, fault), power and communication status.
9. For reliability and to facilitate trouble shooting, at a minimum, the following
external indicators (protections, status, warnings and alarms) shall be
provided: lamp status, driver status, ground fault, and communication time-
out. The lamp driver shall be UL, CE, and RoHS compliant.
G. Quartz Sleeves:
1. Quartz sleeves will be clear fused quartz circular tubing containing 99.9%
silicon dioxide.
2. Sleeves will have minimum UV transmittance at 254nm of 87% (2.5mm
wall thickness).
3. Sleeves will be open at one end only and domed at the other end.
H. Cleaning System:
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An automatic in -situ cleaning system will be provided to clean the quartz
sleeves using both chemical and mechanical methods. Wiping sequence
will be automatically initiated with capability for manual override.
2. The cleaning system shall also incorporate an integrated debris removal
device to clear the quartz sleeves of any large solids or debris to maximize
the life of the chemical/mechanical cleaning system.
3. The wiper on the cleaning system shall be parked out of the effluent when
not in use.
4. Cleaning systems that utilize a screw drive, or park the wiper in the effluent
while not in use, shall not be acceptable due to collection of debris in and
around the wetted parts of the wiper.
5. The cleaning system will be fully operational while UV lamps and modules
are submerged in the effluent channel and energized.
6. To minimize maintenance, UV System will be designed such that cleaning
solution replacement can be performed while the UV Bank and lamps are
in place and operational in the channel.
7. Cleaning sequence frequency will be field adjustable to enable optimization
with effluent characteristics.
8. Cleaning system operation will be remote auto (default) or remote manual.
9. The cleaning system will be provided with the required solutions necessary
for initial equipment testing and for equipment start-up.
10. The wipers shall travel the full length of the UV lamp arc. Designs in which
the wipers only travel part way along the sleeves will not be acceptable.
11. The UV intensity sensor shall be cleaned utilizing the same
chemical/mechanical cleaning method as that of the lamp quartz sleeves.
UV intensity sensors that only utilize a mechanical means shall not be
acceptable.
To be considered as alternate, systems that use only mechanical wiping must
have the ability to periodically be cleaned out -of -channel using a chemical bath.
Out -of -channel cleaning will include lifting slings, removable banks, cleaning
tanks, agitation system, and air compressors, as required. The UV manufacturer
will be responsible for supplying all equipment, including any equipment not
specifically listed, required to perform out -of -channel chemical cleaning.
Contactor will be responsible for installation.
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I. Effluent Level Controller:
1. Level Control Weir
a. To be located at the discharge end of the UV channel and provided
by the UV manufacturer.
b. Weir will be designed to maintain the minimum channel effluent level
required to keep lamps submerged at all times.
C. Weir to be constructed of Type 304 stainless steel.
J. Light Locks
1. Light locks, two per bank, will be provided to force effluent through the UV
treatment zone maximizing disinfection performance.
2. The entire length of the lamp arc will remain submerged to maximize UV
dose delivered to the effluent and to prevent any UV exposure above the
water free surface.
K. Electrical:
1. All applicable electrical components will be UL-listed to ensure safety
standards are met.
2. Each UV lamp within a bank will be powered from a Power Distribution
Center.
3. UV Manufacturer to supply all cabling between lamps and drivers.
4. Each electronic lamp driver will power two lamps.
5. Power factor will not be less than 99% leading or lagging.
6. Electrical supply to each Power Distribution Center will be 480/277V
60Hz, 45 kVA.
7. Electrical supply to the Hydraulic System Center will be 480V 60Hz, 2.5
kVA
8. Electrical supply to the low-water level sensor box will be from 120V, 1
Phase, 2 Wire + GND.
9. Electrical supply to the System Control Center will be 120V 60Hz, 1.8 kVA
Each electrical power supply should be provided with a separate
disconnect to be supplied under the electrical contract.
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L. Power Distribution Center (PDC):
1. The configuration of Power Distribution Centers shall be such that future
expansion can be done without the need for additional cabinets or at a ratio
of 40 lamps per PDC.
2. PDC enclosure material will be 304 Stainless Steel.
3. All internal components will be sealed from the environment.
4. All Power Distribution Centers to be UL approved or equivalent.
5. An internal heater will be provided in the PDC to prevent condensation
when the external temperature drops below the dew point.
6. Each PDC shall be able to electrically isolate each bank of lamp drivers
and safely replace a lamp driver without de -energizing any other operating
banks.
M. Hydraulic System Center:
1. The Hydraulic System Center (HSC) houses the components required to
operate the automatic cleaning system and bank Automatic Raising
Mechanism (ARM).
2. HSC enclosure material will be 304 Stainless Steel (Type 4X, IP 66) (Type
4X).
3. The HSC will contain hydraulic power unit complete with pump, fluid
reservoir, manifolds, valves, and filter.
N. Control and Instrumentation:
1. System Control Center (SCC):
a. The monitoring, operation and control of the UV system is managed
at the System Control Center (SCC) by a CompactLogix with a SCC
HMI AB Panelview Plus 7 - 10" (Indoor Rated) HMI screen.
b. If the SCC is installed outdoors, the operator interface shall be
positioned out of or away from direct sunlight and shall include a
sunshade. The operator interface screen will be designed for a
rugged outdoor environment capable of operating at ambient
temperatures between -30 Deg C and +70 Deg C with a high
brightness display (minimum 1000 Nit). HMI screen shall be certified
for outdoor use (UL50E Type 4X Outdoor)
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C. Alarms will be provided to indicate to plant operators that
maintenance attention is required or to indicate an extreme alarm
condition in which the disinfection performance may be jeopardized.
The alarms will include, but not be limited to:
1)
Individual Lamp Failure
2)
Multiple Lamp Failure
3)
Low UV Intensity
4)
Bank Communication Alarm
d. The 100 most recent alarms will be recorded in an alarm history
register and will be displayed when prompted.
e. Mode of operation for UV Banks can be manual, automatic, or
remote.
f. Elapsed time of each bank will be recorded and displayed on the
display screen when prompted.
2. Low Water Level Sensor:
a. The UV Manufacturer will provide one (1) low water level sensor for
each UV channel.
b. During all modes of system operation (manual, automatic, and
remote), the water level sensor will ensure that lamps extinguish
automatically if the water level in the channel drops below an
acceptable level.
3. UV Intensity Sensors:
a. A UV sensor will continuously monitor the UV intensity produced
within each UV Bank.
b. The sensors will measure only the germicidal portion of light emitted
by the lamps.
C. The UV sensor shall be factory -calibrated to US National Institute for
Standards and Technology (NIST). Sensors requiring field -
calibration are not acceptable.
d. The sensor shall be digitally calibrated to ensure calibration
accuracy.
e. To ensure continuous disinfection, the sensor shall be accessible
without shutting down the system, lifting a bank/module or removing
lamps.
f. Sensors will be designed to provide UV intensity data for dose
monitoring and control functions. Dose pacing program will enable
use of measured UV intensity along with flow rate and UVT to
determine the delivered dose during operation.
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g. Sensors will be designed such that reference sensor readings can
be taken without interrupting disinfection and without removing UV
lamps, banks/modules, or sleeves.
4. Dose -Pacing:
a. A dose -pacing system will be supplied to modulate the lamp UV
output in relationship to a 4-20 mA DC signal from an effluent flow
meter (supplied and installed by Others) and UV intensity sensor(s).
b. The system to be dose -paced such that as the flow and effluent
quality change, the design UV dose is delivered while conserving
power.
C. The dose -pacing system will allow the operator to vary the design
dose setting. Logic and time delays will be provided to regulate UV
Bank ON/OFF cycling.
O. UV Bank Lifting Device:
1. The lifting device for UV Banks will be supplied by the UV Manufacturer.
2. An Automatic Raising Mechanism (ARM) will be designed and supplied to
facilitate lifting a UV bank from the channel without use of ancillary
equipment.
3. The ARM will be integrated into the UV Bank for simple and seamless
operation.
4. The UV Bank will be raised from the channel for easier access and
maintenance.
5. The ARM design will provide access to components without having to
break electrical connections thus reducing wear on connectors.
P. Anchor Bolts
1. All anchor bolts and hardware shall be 316 stainless steel construction.
2. Manufacturer shall provide one (1) set of anchor bolts in sufficient size and
quantity for the UV system installation as indicated on the Contract
Drawings.
Q. Spare Parts:
The following spare parts and safety equipment will be supplied.
1. 10% UV Lamps
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2. 10 Quartz Sleeves
3. 5% Lamp Drivers
4. One (1) bank UV lamp sleeve assembly sets including gaskets, glands, 0-
rings, etc.
5. One (1) bank of UV lamp wiper assemblies, replaceable wear parts only
6. 1 Operators Kit that includes UV -resistant face shield, gloves and cleaning
solution.
7. To be considered as an alternate, systems that require more lamps than
specified, the UV manufacturer will provide spares in the amount equal to
the quantities listed plus an additional quantity equal to the percentage of
lamps required over and above the number of lamps specified.
PART 3 EXECUTION
3.1. INSTALLATION
A. In accordance with contract drawings, manufacturers' shop drawings,
instructions, and installation checklist. Contractor Installation Checklist to be
completed and returned at least two weeks prior to date requested for
commissioning. Photographs illustrating site readiness are required.
B. Equipment shall be installed and operated by, or with the guidance of, an
authorized manufacturer's field service representative. The UV manufacturer
field service representative shall have 5 years of experience commissioning UV
systems of similar design, and additional qualifications specified in the Startup
Requirements section. All equipment installed under this Contract shall be placed
into successful operation according to the written instructions of the UV
manufacturer or the instructions of the UV manufacturer's field representative.
3.2. FIELD TESTS, ADJUSTMENT AND STARTUP
A. Start-up and field testing: An experienced, competent, and authorized UV
manufacturer's field service representative shall visit the site of the Work and
inspect, check, adjust if necessary, and approve the equipment installation. In
each case, the UV manufacturer's field service representative shall be present
when the equipment is placed in operation in accordance with Startup
Requirements section and as specified herein, and shall revisit the jobsite as
often as necessary until all trouble is corrected and the equipment installation
and operation are satisfactory in the opinion of Engineer.
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B. The field service representative shall furnish a written report certifying that the
equipment has been properly installed, is level and in accurate alignment, and
has been operated satisfactorily both in manual and automatic modes.
C. UV manufacturer shall include a minimum of two trips, two working days each
trip, to the site for the UV manufacturer's field service representative specifically
for supervision of startup and testing services.
D. Should the system fail the manufacturer's requirements or performance
requirements, the manufacturer shall at its own expenses make all necessary
modifications to the equipment until such tests can be passed.
3.3. PERFORMANCE TESTING
A. Prior to Start -Up of the UV System equipment, the Contractor shall provide a
Performance Testing plan which has been prepared by the UV Manufacturer for
review to document satisfactory performance of the installed system. The plan shall
include a complete sampling plan for system influent and effluent flows
documenting system loading conditions and disinfection performance.
B. All sampling and testing shall be performed by the Contractor utilizing a state
certified lab for running of tests. Test results shall be prepared and submitted to the
Engineer for review as part of the equipment startup report. The cost of these
sampling and testing will be paid by the Contractor.
C. System performance shall be performed for each UV channel independently and
consist of the following criteria:
1. Provide constant influent flow rate to demonstrate continuous operation of the
UV system for a minimum of five days of stable operation through each UV
channel independently.
2. Provided treated and filtered secondary effluent to the UV system.
D. Influent Testing Parameter: TSS and UVT(%) at a minimum
E. Effluent Testing Parameters: Fecal Coliform at a minimum
F. In the event, stable disinfection results are not achieved for a minimum of five days
of operation, the Contractor shall coordinate efforts to make necessary
improvements to achieve stable UV operation and restart testing until stable
operation for a minimum five-day period is achieved. As part of this process any
additional sampling required at the recommendation of the equipment manufacturer
shall be performed by the Contractor at no additional expense to the Owner.
3.4. OPERATOR TRAINING
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A. The equipment supplier shall provide operator training for Owner's personnel after
system is operational. Training will take place while manufacturer's representative
is at the job site for inspection and shall include one additional trip of at least two
8—hour days or whatever time is necessary to make the operator's staff thoroughly
familiar with the system operation.
End of Section 466656
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