Rainy FL-80 User manual

USER GUIDE
REGISTERED;
FL-80
Dual Intensity Rainwater
Harvesting Filter R
Winner of National & International Awards from
E-mail: Website:[email protected] | www.rainyfilters.com
Copyright - All rights reserved
As a ‘Most Innovative
Water Saving Product’

INTELLECTUAL PROPERTY RIGHTS
PLEASE NOTE
WARRANTY
www.rainyfiters.com
All Copyrights/ Design Rights/ Trademark /Patent Rights and other Intellectual
Properties are solely owned by Farmland Rainwater Harvesting Systems. Designs
of ‘Rainy’ Dual Intensity Rainwater Harvesting Filters, registered.
Logos are Registered, ‘Rainy’ is the registered Trademark of the Company.
‘Rainy’ Dual Intensity Rainwater Harvesting Filters and/or ‘Dual Intensity Rainwater
Harvesting Filters’ are Trademarks of the Company.
Domain name is owned by Farmland Rainwater Harvesting
Systems.
All drawings, industrial drawings, descriptions, artworks, engineering drawings
like explode view, sectional view etc. are copyrights exclusively owned by Farmland
Rain Water Harvesting Systems.
Any plagiarism, replication, duplication, copying, reverse engineering of the
products, prototypes, material, knowhow belonging to Farmland Rainwater
Harvesting Systems is an infringement of the intellectual properties belonging to
Farmland Rainwater Harvesting Systems, which is a criminal offence apart from
liability to pay damages.
1. Read and understand all instructions in the USER GUIDE for the best product
utilization.
2. To set up the system, refer INSTALLATION SECTION (Page No. 14) of the User
Guide.
3. If you have performance related problems, refer TROUBLESHOOTING SECTION
(Page No. 26) of User Guide.
4. There may be chances of slight variations in efficiency of the filter. This is due to
the type of roof, pipes, fittings and angles of installations, pattern of rainfall etc.
5. The Product Specifications are subject to change without prior notice.
‘RAINY’ warrants its product to be free from defects in workmanship and materials,
under normal usage and conditions, for a period of TEN (10) years from the original
invoice date by Manufacturer/Authorized Dealers. This warranty covers the repair
or replacement of any faulty components of the said filter at our discretion. There is
no coverage provided for lost or destroyed filters. For further information refer to
Warranty terms and conditions furnished under WARRANTY SECTION Page No. 28
of the User Guide.

01. General Information about Rainwater Harvesting ...................... 4
Quality of Rainwater
Why Filters are required?
02. VariousApplications ..................................................................... 5
03. Bore well Recharging. .................................................................. 6
04. General Technical Information 7
05.About us ....................................................................................... 8
06. Introduction ................................................................................. 8
07. Rainy FL Series - Technical Parameters ....................................... 12
08. Overall view of the Dual Intensity RWH Filter ................................ 13
09. Filter Installation - Instructions ..................................................... 14
10. Care and Maintenance ................................................................ 23
11. Troubleshooting Information ........................................................ 26
12. DO’s and DON’Ts ......................................................................... 27
13. Warranty / Warranty Terms and Conditions.................................... 28
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3

Rain is the first form of water that we know in the hydrological cycle, hence it is
the primary source of water. Rainwater Harvesting is the activity of direct
collection and storage of rainwater, rather than allowing it to run-off. The
rainwater so collected can be stored for direct use or can be recharged into the
groundwater source. In present times, we depend entirely on secondary
sources of water such as rivers, lakes, bore-wells, etc. In the process, it is
forgotten that rain is the fundamental source that feeds all these secondary
sources. Rainwater harvesting is the key to sustainable future and a substantial
step for mitigating climate change.
Rainwater is regarded as the purest form of water in nature. All the natural water
contains dissolved ions (anion and cation) within them.
Rainwater is formed due to natural distillation process i.e., evaporation,
condensation and precipitation. It is supposed to be in very dilute solution with
very less dissolved solids generally between 10-20 mg/Liter.
All the dissolved ions present in them are in the range of 1-3 mg/Liter.
Therefore, rainwater is considered to be pure and can be used for regular
usages. Additionally, their pH is between 6.7 and 7.2 for consumption
purposes. This concentration varies regionally.
Even though Rainwater is the purest form of water, while it pours down on the
roof of the buildings it gets mixed with dirt particles, leaves, debris, bird
droppings and other undesirable substances deposited on the roof and flows
through the Rainwater Drain pipes. To flush out these impurities before letting
the water into the Sump or Recharging well, appropriate filter has to be
incorporated by studying the size of the building’s roof area, intensity of rainfall,
sizes of the pipeline, sump capacity and filter capacity etc.
Quality of Rainwater
Why Rainwater Filters are required?
4

5
Option 1
Storing the filtered
rainwater in the
underground
sump for re-
utilization purpose
Option 2
Recharging the
borewell by
connecting the
filtered water
directly to the
casing pipe if roof
area is less than
200 sq. mts.*
Option 3
Recharging of the
borewell if roof area
is more than 200
Sq. mts. through
Farmland ‘V’-Wire
Technology
Option 4
Recharging of
Open Well
*Please note that the intake of rainwater depends upon the characteristics of individual bore wells. Sometimes,
the water may percolate through the casing quickly and in some cases, the bore well may overflow. In that
situation, it is advisable to go for a recharging well as in Option 3

Aquifer
Circular Reinforced
Groundwater Source
concrete storage wall
Rainy filters
Groundwater recharging (Bore-well Recharging) through Rainwater.
If the rooftop area is more than 200 Sq. meters, the rooftop water can be directly diverted
to the bore-well through a rainwater filter. Else, the surface run off is channelized to the
recharging structure as follows; ‘V’-wire injection well technology can be used to
recharge groundwater sources and replenish the water table. Run off rainwater is made to
pass into a silt trap through a channel and then to an injection well. Here, it goes through
multiple filtration media and is eventually passed on to a specially designed storage well.
The storage well has dual non clogging ‘V’-Wire screens attached to a percolator pipe.
The clean water is then made to percolate into deep layers of the Earth’s strata, ultimately
recharging the groundwater source and replenishing the water table.
6

1 square meter of area at the rate of 25.4 mm precipitation of rainfall, the collection of
water=25.43 liters, therefore, 1 acre of area (43560 sq.ft or 4050 sq.m) yields
103012.36 liters of water.
Considering 100 square meters of roof area.
Roof area in square meter x coefficient of friction of roof x filter efficiency x
rainfall in mm = water in liters.
Evaporation, friction and absorption of water by the roof etc.
Usually 15 to 25% loss of water will be occurred depending upon the type of roofs.
It depends upon the type of filter and manufacturer’s guarantee on
performance and efficiency of filter
Per day s highest rainfall or per year s average rainfall to be
considered.
Roof area-100 sq.m, Coefficient of friction-0.85%, Filter Efficiency-90%, Average
Rainfall/year considered 1000 mm.
100x 0.85x 0.90 X 1000= 76500 liters
Size of the water storage tank can be decided based on the roof area available for
harvesting the rainwater while considering either highest rainfall per day or 5% of
average annual rainfall. For the above said area the ideal tank capacity would be 5000
liters.
While calculating the sizes of water tanks, filter, rain gutters, down take pipes etc.
it is suggested to assume 20% higher capacity than the original value in order to round
off the error and to accommodate slight tolerance range.
Example:
Calculation:
Coefficient of friction:
Filter efficiency:
Rainfall in millimeter: ’ ’
To calculate the required tank size:
Note:
7

Farmland Rainwater Harvesting Systems (FRHS), founded in 2002, aimed
at end to end solutions for installations of Rainwater Harvesting Systems
including patented products and ongoing R&D Manufacturing.
Our mission statement is to conserve every drop of rainwater by using
continuous innovation.
Giving back to nature and reducing our carbon footprint for a greener
tomorrow is at the core of everything we do.
We are building scientifically engineered systems of rainwater harvesting,
which will enable customers with economical, high quality and easy to
maintain products.
We pride ourselves in having our own research facility, which has our
Hydraulic Testing Lab equipped with the latest machinery.
Our widespread dealer network spanning over 11 countries with highly
trained field service engineers are always available to solve every query.
Congratulations on adapting RAINWATER HARVESTING SYSTEM by
installing our state of the art 'Rainy' Dual Intensity Rainwater Harvesting
Filter. We appreciate your initiative towards water conservation.
`RAINY', first of its kind Rainwater Harvesting Filter with unique self-
cleaning and auto flush out arrangements.
The ‘RAINY’ Filter in your possession is the result of over 20 years
continuous R&D done by the team of FARMLAND RAINWATER
HARVESTING SYSTEMS, by studying the pattern of rainfall in rural and
urban areas, intensity of rainfall, type of houses, pipeline used for rainwater
outlets, reutilization, recharging of ground water and tube well etc.
Introduction
8

Our continuous efforts, extensive research and development work of over two
decades resulted in the invention of a completely revolutionary type Dual
Intensity Rainwater Harvesting Filters, works by gravity, based on the working
principle of cohesion and centrifugal force. The key point of this filter is the self
cleaning mechanism in eliminating the need of periodic maintenance. Constant
innovations with the help of cutting-edge technologies led to further
improvement in the design and manufacture of the rainwater harvesting filters.
It is scientifically designed and built to give you a long and dependable service.
Careful selection of materials and manufacturing assures you a satisfactory
performance as per the filter rating. All materials used in this technology are
highly durable and recyclable.
In recognition of the successful implementation of the technology, involving,
rooftop ‘Rainy’ rainwater harvesting filters enabled various walks of life
overcome the water crisis in most drought prone districts belonging to various
states of India. The implementation of this nascent technology is recognized and
awarded with few National and International Awards, National award in the year
2009 from Confederation of Indian Industry (CII) as “Most Innovative Water
Saving Product”and International award in the year 2010 from JSW The Times
of India “Earth Care Award for Innovation for Climate Protection”. In addition to
various other recognitions FRHS has received the prestigious “Green
Champions Award”in the year 2011 presented by Indian Green Building Council.
In the year 2014 another International award from JSW The Times of India “Earth
Care Award”awarded to FRHS in relation to our Innovative FL-V Wire Injection
Well Technology involving groundwater recharge in the category of ‘Innovation
for Climate protection’, National award by Aqua Foundations as ‘Aqua
Foundation’Excellence Award 2017 under the category of Industrial Excellence
in Development of Technology in the Field of Rainwater Harvesting, In the year
2018, SKOCH group conferred highest independent honour by endowing
“SKOCH award - Achiever Silver”for the innovation of ‘Rainy Filters’.
‘RAINY’Filter will give you years of trouble-free performance if handled with
care. This User Guide contains step by step direction. It covers general
instructions bout installation and operation of ‘Rainy’Filters. Read this manual
and comply ith the instructions so that your ‘Rainy’Filter is bound to serve
you well.
a
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9

‘Rainy’ Filter can be fixed to the wall by connecting to the hollow pipe
which is drawn from the roof into the Filter Inlet. The Rainwater along
with dirt & debris flows by Gravity through the hollow pipeline, enters
into the filter, starts rotating in anti-clockwise direction at the periphery
of the upper housing so as to flow into the SS-304 filter element placed
in the lower housing in angular motion at specific speed & velocity which
creates Cohesive force at low intensity & Centrifugal force at high
intensity of rainfall. In both situations, involving low & high intensity of
rainfall, the working principle of the filter based on cohesive &
centrifugal force respectively, aids the filter element to flush out
automatically the dirt & debris through the drain outlet and
simultaneously divert clean water into the sump/recharging well
through the clean water outlet, which can be used for reutilization or
recharging of groundwater source.
Special Features
• Since the filter assembly is an open drain system, it does not allow
for the stagnation of water and solid particles, eliminating the need
for periodic maintenance.
• The filter has self-cleaning capabilities enabled by its unique
working principles, with efficiency of over 90%.
• No external source of energy is required, because the filters are
designed to operate by Gravitational force.
• Rainy filters are extremely versatile such that they can be
accommodated anywhere, from being wall mounted on low lying
roofs to underground ducts.
• Tough UV stabilized high density polyethylene housing.
• Filter Element SS-304 is multi-surface screen.
• All the material used are food grade and recyclable.
• Filter pipe connections can be turned up to 360 degrees allowing it to
suit the given site conditions
10

• Simple in connection, which any local plumber can easily install.
• The filter efficiency remains unchanged even with the variation of
intensity of rainfall.
• The filters do not have any moving parts, therefore no wear and
tear of the filter occurs, allowing for long life span.
• Various models are available to cater to various dimension of roof
areas.
• 'Rainy' filters are cost effective and affordable to the common man.
• By storing the harvested rainwater in the sump and reutilizing,
around 35% of the annual water requirement of a household can
be met. Thereby a considerable amount on water and power bill
can be saved.
• Dependency on water tankers, groundwater and corporation
water can also be much reduced.
• Reduces significant carbon footprint.
• Technology works on the Gravitational Principle so saves power
(reduces the pumping of water from distant places & depths).
• Swirling movement of water is formed while ‘Rainy’ filters are
under operation, this leads to aeration of water. Thus, increases
the water quality.
• Prevents over exploitation of groundwater source.
Advantages:
11

Rainy FL-80 - Technical Parameters
Intensity of Rainfall 5 mm/Hour to 75 mm/Hour
Filter Type Open ended, non-clog
Working Principle Cohesive Force & Centrifugal Force
Operating Pressure > 1 feet of gravity Head (0.060kg/cm )
2
Max Discharge at CWO 120 LPM
Filter Element SS-304 Multi-Surface Screen - Food Grade
Mesh Size 250 Microns
Inlet Size 90 MM
Clean Water Outlet Size (CWO) 63MM
Drain Outlet Size 90 MM
Filter Housing UV Stablized - HDPE
Filter Efficiency Above 90%
Source of Power Gravity
Technical Specifications & Parameters of Rainy- FL-80
REGISTERED;
upto 120 Square meters
Suitable for Area
12

Filter Element
SS-304
Straps
Wall
Bracket
Rainwater Inlet
Clean water outlet
adapter bush
01. Filter cap
02. Upper Housing
03. Union
04. Filter element - SS 304
05. Intermediate bush
06. Straps
07. Wall Bracket
08. Lower housing
09. CWO adapter bush
10. Bellow for drain outlet
13

14

Place the filter assembly on the wall bracket. Then,
pull the strap and hook up to the wall bracket
Place the filter against the wall to spirit level as shown
in the figure and mark the point to fix the wall bracket
15

Drill the holes to the wall as per the marking
Fix the wall bracket with anchor bolts and tighten the
nuts correctly.
16

Fix the filters to the wall bracket through straps
Set the direction of filter inlet and outlet just by rotating
to suit the pipe connection by hand.
17

Once the direction of filter inlet and outlet pipe connections are set
connect the down spout pipe to the inlet of the filter
Fix 'L' angular clamps with 'U' bolts and anchor bolts
with adjustable 'C' Clamps at inlet pipe.
18

Insert the pipe with elbow into the bellow
Fix the 'L' angular clamps with 'U' Bolts
and clips to sustain the weight of the drain
Insert the bellow to the drain outlet with clips
19

Insert adapter bush to the clean water outlet
Connect the delivery line to the sump/recharging well
with necessary length of pipe and fixtures
20