www.braewater.com | 1-800-772-1958
BRAE COMPLETE COMMERCIAL RAIN HARVESTING SYSTEM B_AG2_ID2
SCOPE OF WORK
It is the intention of this specification to describe a complete rain harvesting system
designed to collect, filter, store and distribute rainwater of appropriate water quality for a
designated end use. This is to be accomplished by using a completely pre-fabricated
rainset control station and pre-engineered water storage system conforming to the
following specifications.
The rainset control station shall be model number BRAE-RMH-10-150-P2-L2-T1 and
the storage tank shall be model number
BRAE-PE-ERC-30437-HR as
manufactured and distributed by Blue Ridge Atlantic Enterprises, 550 East 5th St.,
Oakboro, NC 28129, www.braewater.com
PART 1-GENERAL
1.1
SUMMARY
BRAE Commercial Rainwater Systems integrate the filtration, distribution and treatment
functions required by commercial facility end use applications utilizing rainwater as
source water. The rainwater rainset control station shall be a UL listed pump station and
be the product of a single packaged system manufacturer. The intended use of rainwater
at Duck Town Hall includes (Check all that apply):
X
Landscape Irrigation
Hose Bib Water Supply
Cooling Tower Make-up
Toilet Flushing
Laundry
Process Water
Fire Protection
This section includes the following rainwater system components and related equipment:
Sump
X
Cisterns
X
Rainset Control Station
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1.2
SUBMITTALS
A. Product Data: For all equipment specified, include certified performance
curves with operating points plotted on curves; and rated capacities of selected
models, furnished specialties and accessories.
B. Shop Drawings: For all equipment and accessories, include plans, elevations,
sections, details and attachments to other work.
1. Wiring Diagrams: Detail power, signal, and control wiring
2. Dimensioned Outline Drawings of Equipment Unit: Identify center of
gravity and locate and describe mounting and anchorage provisions.
3. Detailed description of equipment anchorage devices on which the
certification is based and their installation requirements.
1.3 QUALITY ASSURANCE
A. ASME Compliance: System shall comply with ASME B31.9 for piping
B. Pump system shall be certified and listed by UL for conformance to US and
Canadian Standards.
C. Electrical Components, Devices and Accessories shall be listed and labeled
as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities
having jurisdiction, and marked for intended use.
D. All packaged pump systems shall be factory tested for performance and
hydrostatic tested as specified. Verified Factory Performance Tests and Witness
Factory Performance Tests shall be options provided by the rainwater system
packaged pump system manufacturer.
1.4 DELIVERY
A. Shipping flange protective covers, protective coatings and packaging shall be
retained during shipment and delivery
B. Bearing and couplings shall be protected against damage
C. Manufacturer’s written instructions for system delivery shall be followed.
1.5 COORDINATION
A. Concrete form work, foundation dimensions, location and reinforcement shall
be coordinated based on manufacturers written specifications prior to system
delivery.
B. Guttering, downspout conveyance piping, electrical supply to pump system
and related controls and discharge piping to points of use shall be coordinated
between applicable trades based on manufacturers written specifications prior to
system delivery.
C. Operation and Maintenance: Maintenance and Operations Manuals shall be
supplied.
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www.braewater.com | 1-800-772-1958
PART II. SYSTEM COMPONENTS
2.0 MANUFACTURERS
Available manufacturers: Subject to compliance with requirements, manufacturers
offering products incorporated into the Work include BRAE Rainwater Harvesting
Systems. Manufacturer shall deliver to project site a complete system capable of
performing the filtration, storage, distribution and water treatment capabilities standard
for rainwater systems as a single source supplier.
BRAE-Blue Ridge Atlantic Enterprises, 550 East 5th St., Oakboro, NC 28129
www.braewater.com, 1-800-772-1958
2.1 Initial Filtration for Cistern and Sump Tank (Check all that apply and coordinate with
drawing set)
X
All rainwater entering the cistern/tank/sump shall be first filtered through a BRAE
downspout inlet filter.
X
Primary filtration of stored cistern water shall be a stainless steel floating extractor
with
1 ” dia. discharge supplied by BRAE.
Inlet filtration shall integrate a first flush diverter capable of diverting a specified
quantity of water appropriate for the collection area size. First flush device may be
a wall mount style.
2.2 CISTERN(S)
Cisterns shall be two1,500 gallon above ground PE (polyethylene) cisterns suitable for a
total storage capacity of 3,000 gallons. Cistern(s) shall be supplied by BRAE and cistern
shall be erected on-site by cistern supplier or approved cistern installation company.
Cisterns shall be two (1,500 nominal gallons)
If two cisterns are installed in tandem, cisterns shall be connected by an equalization
pipe.
2.3 BRAE RAINWATER RAINSET CONTROL STATION (RRCS)
The Rainwater Rainset Control Station shall be a standalone, pre-fabricated pump
station delivered to perform the central control functions of the rainwater supply system.
There shall be a single rainwater system control station for supplying the landscape
irrigation needs. Primary Control Station Duties shall be integrated with and perform the
following:
A. Provide 100 micron Sediment Filtration for Cistern Pump Discharge “Water
Treatment”
B. Supply and automate NPW Back-up Supply from user defined source
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BRAE_B_AG2_ID2
www.braewater.com | 1-800-772-1958
C. Meter Rainwater Supply and NPW Back-up Supply
D. Integrate a Hydropneumatic Tank
E. Supply user defined delivery pressures for a user defined maximum flow rate
A. SEDIMENT FILTRATION
One sediment strainer with 100 micron rated Stainless Steel screen shall provide
primary water treatment function. Unit shall contain a removable strainer filter which
provides for ease of maintenance. Strainer shall include an optional self flushing feature
as required by design engineer.
B. BACK-UP SUPPLY
The Rainwater System Control Station shall include a make-up water supply for periods
of inadequate rainfall to fill cisterns. RSCS shall monitor cistern water level via a
submersible pressure transmitter. Supply shall be operated by the rainwater rainset
Central Control Panel and be actuated once a user-defined set-point is exceeded. Makeup water (city or well) shall be supplied to cistern tank. RPZ required by plumbing code
to be provided by plumbing contractor.
C. METERING
Make-up water supply and cistern pump discharge water shall be metered.
D. HYDROPNEUMATIC TANK
Rainwater system control station shall include a 4 gallon pressure tank.
E. CISTERN PUMP AND VFD
Water stored in the cistern(s) shall be pumped to the Rainwater Rainset Control Station
with a stainless steel vertical turbine pump. Pump shall have the following capacities
and characteristics:
Capacity and Characteristics:
gpm.
1. System Capacity: 10
2. Number of Pumps: One
3. Each Pump:
a. Capacity: 10 gpm.
b. Total Dynamic Head:
160
c. Speed: 3500 rpm.
d. Discharge Pipe Size: 2-inch
e. Motor Horsepower: 1.5
f. Electrical Characteristics:
1) Volts:
220
2) Phases:
1
3) Hertz: 60
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feet.
BRAE_B_AG2_ID2
www.braewater.com | 1-800-772-1958
F. WATER TREATMENT
System shall include a self-flushing sediment filter rated for 100 microns and sized
based on technical specifications. The filter shall be integrated with a manual isolation
valve and solenoid control for self-flushing function. Contractor installing the rainset
control station shall direct flushed water piping away from rainset base to an appropriate
location as identified by the specifying engineer.
G. RAINSET ENCLOSURE
Rainset control station equipment shall be pre-fabricated, pre-wired and pre-plumbed
inside of a powder coated steel enclosure. Enclosure shall have lockable latch and piano
hinged doors for easy access to controls and pump equipment.
2.4 MISCELLANEOUS SPECIALTIES
A. The cistern(s) shall have internal water levels constantly monitored. Cistern Level
Sensor shall be equivalent to a LS-10, 4-20mA SS submersible pressure transmitter
length to suit cistern depth. Install sensor in 1-1/2 inch PVC, schedule 80 pipe open at
bottom. Conduit connecting rainset control station and cistern shall be provided by
others.
B. Pump intakes shall be protected by a coarse floating extractor sized to match pump
intake pipe diameter. Install floating extractors in cisterns and arrange to provide access
for maintenance including period inspection and filter cleaning. Floating extractor shall
be equivalent to BRAE model # :
20840 .
PART 3-EXECUTION
3.1 EXAMINATION
Examine roughing-in for equipment to verify actual locations of connections before
installation.
3.2 CONNECTIONS
A. Drawings indicate general arrangement of piping, fittings, and specialties.
B. Connect plumbing system piping to rainwater system control station discharge.
Install discharge pipe equal to or greater than size of unit suction and discharge
headers.
1. Install flexible connectors on piping connections to unit suction and discharge
headers. Install flexible connectors same size as piping.
2. Install shutoff valves on piping connections to each booster pump suction and
discharge headers. Install ball, butterfly, or gate valves same size as suction and
discharge headers.
3. Install union or flanged connections on pump discharge headers at
connection to irrigation system.
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www.braewater.com | 1-800-772-1958
3.3 STARTUP SERVICE
A. Engage a factory-authorized service representative to perform the following startup
service:
1. Complete installation and startup checks according to manufacturer’s written
instructions.
2. Check piping connections for tightness.
3. Clean strainers if any.
4. Verify that pump controls are correct for required application.
B. Perform the following startup checks for each pump of irrigation pump station before
starting:
1. Verify bearing lubrication.
2. Prime pumps by opening suction valves and closing discharge valves, and
prepare pumps for operation.
3. Start motors.
4. Open discharge valves, slowly.
5. Adjust settings.
3.4 CISTERN CLEANING
Cistern Cleaning: Prior to starting up rainwater rainset control station. Cistern shall be
inspected by engineer prior to allowing rainwater to enter cistern.
3.5 LABELING AND IDENTIFICATION
Install identifying equipment markers and equipment signs on pumps, hydro-pneumatic
tanks, water filters, water treatment equipment, control panels, and disconnects/starters.
Labeling and identification materials shall be typical for “Mechanical Identification” and
codes for non-potable water systems.
3.6 DEMONSTRATION
Engage a factory-authorized service representative to train Owner’s maintenance
personnel to adjust, operate, and maintain inlet filters, cistern pumps, related water
treatment equipment and rainwater rainset system controls.
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