Davey RainBank KRBS1 User manual
For any assistance or after sales service contact your
Davey Dealer. For help in locating your closest Dealer
contact your appropriate Davey Support Centre listed
on the back of this booklet.
• INSTALLATION
• OPERATION
•
TROUBLE SHOOT
ING
INSTALLATION
INSTRUCTIONS
WMTS-477:2016 Lic WM-022042
2
Davey commenced in 1934 and today, as Davey Water Products, manufactures and distributes
a comprehensive range of products for transfer, conservation, treatment and filtration of water.
Davey has a dominant market share in Australia and exports to more than 50 separate countries,
servicing some of the toughest environmental and climatic conditions on the globe.
Davey has maintained its commitment to research and development, resulting in innovative new
products servicing specific and emerging market opportunities. Many of these products have received
multiple awards for innovation and excellence which have led to our induction into the Manufacturing
Hall of Fame in Victoria.
Davey maintains leadership in quality with an environmental focus by holding ISO 9000-2001
accreditation and ISO 14000 environmental standard.
Davey is today a wholly owned subsidiary of GUD, a ‘Top 200’ Australian public company whose
shares are listed on the Australian Stock Exchange.
Now more than ever “Depend on Davey” reflects a business culture of dependable, innovative water
solutions when and where you need them, supported by the best service and advice.
3
CONTENTS
About RainBank. The easy way to save water. 4
Two types of installation - quick reference 5
How RainBank works 6
How to install RainBank 7
Before you start 9
Installation instruction 11
Pump outside tank option 12
Pump inside tank option 14
Float switch installation 18
Installation of Submersible Pumps 25
Priming Pumps 26
Maintaining RainBank 28
Trouble shooting RainBank 29
Warnings 32
Plumbers Tips 33
Davey Guarantee 35
Contact Details 36
4
m5
m5
m4
100,000 Litres
Congratulations on your purchase of
a high quality Australian made Davey
RainBank automatic water controller.
RainBank is patented and has been fitted
to thousands of homes.
• RainBank allows you to use water
from your rainwater tank for your
toilet, washing machine or garden
whenever there is water in the tank.
• If the tank water is exhausted
RainBank automatically and
seamlessly switches you over to
mains water.
• RainBank has an in-built “dual
check valve” for low hazard backflow
prevention.
RainBank can save up to 40% of
your home’s usage of mains water,
which could be up to 100,000 litres
of water a year.
Your actual savings depend on your roof
catchment area, rainfall and the size of
your tank.
RainBank may allow you to claim
tank rebates (when installed on
existing homes). Check with your
local water authority.
In some areas of Australia, having a
RainBank and using rainwater for your
toilet and washing machine allows you
to claim tank rebates paid by state
governments and some councils.
RainBank is energy efficient and
cheap to run.
Because RainBank only works when it is
needed it uses very little energy.
The daily power used to run a RainBank
and pump system supplying two toilets in
a three person dwelling is equivalent to:
• A reverse cycle air conditioner for
3 minutes
• A clothes dryer for 3 minutes
• A washing machine for 10 minutes
• A TV or PC for 30 minutes
ABOUT RAINBANK
THE EASY WAY TO SAVE WATER
5
6
6
1
2
5
1
2
3
In-tank Option Model No. KRBS1&2
3
5
6
9
4
7
Above Ground Option Model No. KRB1,2,3&4
9
4
Mains water supply
900kPa Maximum
1
3/4” BSP Male thread
2
3/4” BSP Male thread
3
Pump Power lead
4
RainBank Power lead
5
Stop valve
Warning:
Do not reconnect with
mains water supply
Important:
All pipework and outlet
fittings from RainBank must
be labelled to AS/NZS 3500.1
6
Float switch
7
Manual start button
8
Rainwater supply via pump
9
8
8
ABOVE GROUND OPTION
MODEL NO. KRB1, 2, 3 & 4
IN-TANK OPTION
MODEL NO. KRBS1 & 2
TWO TYPES OF
INSTALLATION
(see page 12) (see page 14)
6
1. When there is demand for water
from your toilet, washing machine or
garden tap, RainBank senses
this demand and checks the level of
water in the rainwater tank.
Note: demand must be greater than
1.5 litres per minute or mains water
will be delivered.
2. If there is rainwater in the tank
RainBank switches on the pump.
The pressure of the pump is
sufficient to overcome the pressure of
the mains water inside RainBank
and this moves a plunger and allows
the rainwater to flow.
Note: mains water pressure
is not restricted.
3. When there is no longer a demand for
water, RainBank detects that water
has ceased to move inside the pipes,
switches off the pump and waits for
another water demand.
4. If RainBank senses a water
demand and detects insufficient
waterin the rainwater tank it will
automatically allow the mains water
to flow.
5. If there is a power failure during a
demand for water RainBank will
automatically supply the mains
water as backup.
What are the advantages of
RainBank over conventional
air-gap systems?
• RainBank is totally hands off and
needs no maintenance or adjustment.
• RainBank is easy to install.
• RainBank does not require mains
water to be re-pumped and
therefore saves energy.
• RainBank is WaterMark approved
– this means plumbing inspections
will be approved & your plumbers
insurance should cover installation
faults.
• RainBank will provide mains water
as backup when:
- there is no rainwater
- there is no electricity to run pump
- the pump has been removed for
servicing. Air-gap systems rely on
pumps to pressurise all water
and do not function without them.
HOW RAINBANK WORKS
7
IMPORTANT
Because it involves mains water,
RainBank may only be legally
installed by a licensed plumber.
Ensure mains water pressure is
limited to 600kPa.
NOTE: Because the effects of seasonal
change etc. can cause the
pump and tank to move slightly
relevant to the home it is highly
recommended that discharge
and/or suction pipe lines be fitted
with flexible pipe, such as braided
hose, reinforced suction hose or
polythene pipe.
Different types of RainBank
Installations
There are different ways a RainBank can
be installed depending on your rainwater
tank and pump configuration.
INSTALLATION TYPE 1 - PAGE 16
Tank: above ground
Pump: outside tank
Float switch: must be installed inside
of tank
Pump Kit: KRB1, 2, 3 & 4
INSTALLATION TYPE 2 - PAGE 21
Tank: above ground
Pump: submersible inside tank
Float switch: incorporated with pump
Pump Kit: KRBS1 & 2
INSTALLATION TYPE 3 - PAGE 22
Tank: below ground
Pump: submersible inside tank
Float switch: incorporated with pumps
Pump Kit: KRBS1 & 2
Mains In To House
Mains In To House
FS
HOW TO INSTALL RAINBANK
!
Mains In
To Hous
e
8
INSTALLATION TYPE 4 - PAGE 23
Tank: Below ground and at ground level
Float switch: Top entry
Pump Kit: KRB1, 2, 3 & 4
Different ways of installing the
RainBank unit itself.
• Exposed installation against wall
(under eaves).
• Encased installation with unit and
pump inside cover.
• Integrated installation incorporated as
part of tank system.
FV
Mains In
To House
To House
Mains In
To House
Mains In
To House
Mains In
9
IMPORTANT:
• If you are in doubt about any aspect
of your RainBank kit’s suitability,
check with your Davey Dealer. For
help in locating your closet Dealer
call the appropriate Davey Customer
Service Centre listed on the back of
this booklet.
• RainBank is designed to handle
clean rainwater and mains water.
It should not be used to interconnect
as part of a bore water, dam water,
grey water, stormwater or recycled
water system without appropriate
additional backflow.
• Make sure the wiring, plumbing and
the RainBank unit are protected
from access by children and pets.
Other things we recommend to
maximise the performance and
serviceability of your RainBank.
• Fit a first flush system to the guttering
if possible to divert the initial run of
water from the roof that may contain
dirt and pollutants.
• Fit a strainer to the top of your tank
inlet to stop leaves entering the
system.
• Fit a 1 inch ‘Y’ strainer with 200
micron mesh to the pipe work
between the pump and RainBank.
This will ensure that debris from
the tank will not build up inside
RainBank, washing
machines or toilet cisterns.
• Use at least 20mm or ¾ inch
plumbing to and from RainBank to
reduce the effect of pipe friction.
Galvanised pipe not recommended.
!
BEFORE YOU START
10
Make sure the delivery from
RainBank to your home is within the
following pipe length limits:
Pipe
diameter
Max. pipe
length @
6 lpm flow
Max. pipe
length @
12 lpm flow
15mm 1m 1m
18mm 90m 27m
20mm 235m 135m
For each bend or tee you should reduce
the above distances by 0.5m.
• We recommend fitting isolation valves
to the rainwater and mains water pipe
so that the RainBank can be easily
and conveniently removed if required.
This saves both wasting rainwater and
having to turn off the mains supply if
the unit ever has to be removed.
• While RainBank does have an in-built
DUAL CHECK back flow prevention
valve, some water authorities require
an additional external back flow
valve to be plumbed into the mains
water delivery line, to prevent any
possible contamination of mains
water by rainwater, particularly if the
tank is partially or fully submerged.
Check with your local water authority
for their plumbing guidelines on
rainwater tanks.
• Double check valve assemblies are
available from Davey and should be
installed if the tank is partially or fully
buried.
• Mains water must be limited to below
600kPa.
This manual suits for next models
5
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