Davey RainBank Evolution MkII User manual

• INSTALLATION
• OPERATION
• TROUBLE SHOOT ING
INSTALLATION
INSTRUCTIONS
ATS 5200.477 Lic WMKA 22042
with
Evolution MkII

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 60 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 9001 certification
and ISO 14001 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
Components 5
How RainBank works 6
Before you start 7
Installation instruction 8
How to install RainBank 9
Testing 11
Back Flow Prevention Requirements 12
Installation of Submersible Pumps and Priming 13
Maintaining RainBank 14
Trouble shooting RainBank 15
Warnings 17
Plumbers Tips 18
Davey Guarantee 19
Contact Details 20

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 Australian 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 back
flow 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.
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
COMPONENTS
Primary filter
chamber
Secondary filter
chamber
Dual check
valve
Inlet/outle
t
connections
Outlet
isolation
valve
Mains isolation
valve
RainBank
Outer Cover

6
HOW RAINBANK WORKS
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 water
in 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 for
your customer and needs no
maintenance or adjustment.
• RainBank is easy to install.
• RainBank does not require mains
water to be re-pressurised 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.

7
BEFORE YOU START
IMPORTANT:
• Because it involves mains water,
RainBank may only be legally
installed by a licensed plumber.
Ensure mains water pressure is
limited to 600kPa.
• 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.
Other things we recommend to
maximise the performance and
serviceability of your RainBank.
• Fit a first flush system 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.
• Use at least 20mm or 3 ⁄4 inch
plumbing to and from RainBank to
reduce the effect of pipe friction.
Galvanised pipe not recommended.
• Clean filters inside cabinet regularly.
• 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.
!

8
INSTALLATION INSTRUCTIONS
Things you should be aware of:
• Before installing RainBank please
read all instructions carefully as
failures caused by incorrect
installation are not covered under
warranty.
• The pumping of abrasive materials
will damage the system and void the
warranty.
• Some insects such as small ants find
electrical devices attractive for
various reasons. If your controller or
pump is susceptible to insect
infestation you should implement a
suitable pest control plan.
• Limit mains water pressure to
600kPa.
• All pipe work and fittings should be
labelled in accordance with local
standards such as Australian
Standard AS/NZS 3500. This standard
requires that all pipework containing
rainwater is marked with green
‘rainwater’ tape or stickers at 1
meter intervals and every outlet that
may deliver rainwater is to be
permanently signed with ‘Rain Water’
signage or a green tap marked ‘RW’.
• Mains electrical connections and
checks must be made by a qualified
electrician and comply with applicable
local standards. The 12 volt
connections need not be carried out
by a qualified electrician, but should
be done in compliance with applicable
standards.
• In accordance with AS/NZS
60335.2.41 we are obliged to inform
you that this controller and any pump
controlled by it is not to be used by
children or infirm persons and must
not be used as a toy by children.
• Davey recommends a 2mm hole in
the pipe work just above the pump
outlet to clear air from the pipe work.
NOTE: Please be advised that a
disconnection incorporated in
the fixed wiring is to be provided.

9
1. Run mains water plumbing, rainwater
plumbing and power supply through
external wall according to the following
dimensions.
2. Cut ø365-375 hole in tank top. Ensure
that the hole position coincides with
a clear area for pump to reside on
tank floor. Pump should be placed
in a position on tank floor which has
adequate dimensions so as not to
restrict the movement of the float
switch.
3. Cut pump stand pipe so that pipe end
is approximately 50mm from tank top
in installed position.
4. Connect a cable or chain to the
submersible pump – so that it can
be lowered into the rainwater tank –
important – handling the pump
by straining the power lead will
damage the pumps water seals
and cause premature failure not
covered by warranty.
5. Connect PVC (DN25) to the pump
outlet and lower assembly into the
rainwater tank. Cable tie pump power
lead to the pipework.
HOW TO INSTALL RAINBANK
80
50
50
200 CL
SPACING
Cable tie
PVC pipe
Float switch
Pump
Handle
2mm hole

10
6. Cable tie power lead from pump to
pipework and bundle excess cable to
base of the Evolution MkII.
7. Arrange pump so that stand pipe
aligns with Evolution MkII inlet at
base of primary filter chamber.
8. Remove primary filter lid and filter
from the Evolution MkII housing to
expose four Phillips head screws in
chamber base.
9. Fasten Evolution MkII to tank top
using self drilling sheet metal screws
using the 7 locations provided.
10. Fasten the four screws in the base
of the primary chamber in order to
clamp stand pipe in position. Ensure
screws are tight by repeating the
tightening pattern.
11. Reinstall the primary filter and lid.
12. Connect Mains and outlet plumbing
to Evolution MkII ensuring correct
orientation. If plumbing fit out is
incorrect, the use of flexible hoses
is suggested to connect to the
Evolution MkII.
13. Open Mains water valve and check
for leaks.
14. Switch on power to RainBank and
check for flashing green light – light
will flash ten times as it boots up.
15. Open a tap downstream of RainBank
to clear lines of air and check for
leaks. Requires a flow rate of at least
10 litres in 1 minute to expel air.
16. Press manual override button on top
of RainBank to start pump and flush
air from rainwater lines. There must
be rainwater inside the tank – this is
an important part of commissioning
the system.
17. Close tap and check for leaks.
pipe clam
p
screws

11
TESTING
IMPORTANT: TO PROTECT AGAINST ELECTRICAL SURGES AND LIGHTENING STRIKE
DAMAGING RAINBANK OR ITS PUMP WE STRONGLY RECOMMEND THE USE OF A SUIT-
ABLE SURGE PROTECTION DEVICE AND RESIDUAL CURRENT DEVICES.
Test the operation of RainBank.
1. With the mains connected and the
rainwater tank empty turn on one
of the taps in the laundry that feed
the washing machine or flush the
toilet. Mains water should flow
normally. The pump should not turn
on. When this is completed turn off
tap.
NOTE: Mains water indicator light is
not applicable on this model.
2. Fill the rainwater tank with sufficient
water to activate or cover the pump.
3. Check that the pump is correctly
primed and there are no air locks that
will interfere with its operation. This is
essential for the proper operation of
the unit. See the instructions on how
to do this in the Priming section on
page 13.
4. Turn on a tap or flush a toilet in
the rainwater system. The pump
should run and deliver rainwater.
Allow to run for several minutes to
clear air from pipes. The ‘status’
light will now glow ‘green’.
5. Check for leaks around RainBank, the
pump, pipework and fittings.

12
IMPORTANT
• Under Australian Standard 3500
collecting/storing rainwater in a
buried tank is considered a medium
level hazard. Even though RainBank
has a built-in dual check back flow
valve, you may be required to fit
additional backflow protection valves
to satisfy this requirement – check
with your local council as to their
guidelines on rainwater tank
installation and backflow prevention.
There is no need for a separate float
switch as this comes attached to the
submersible pump and does not plug
into the RainBank unit.
BACK FLOW PREVENTION
REQUIREMENTS

13
INSTALLATION OF
SUBMERSIBLE PUMPS
1. Use Teflon tape on the pipe
to pump connection.
2. Secure the power cable to the
delivery pipe with cable ties.
3. Place pump into tank.
4. Davey recommends the fitting of
floating inlets to submersible pumps
to minimise any possibility of sludge
intake. Part number to suit pump
D42A/B is FI-42.
Cable tie
PVC pipe
Float switch
Pump
Handle
2mm hole
!IMPORTANT
Do not pull on power lead. Fit a
rope to handle for lowering and
raising pump.
Submersible pumps inside tank.
Provided the pump is sitting in sufficient
water the pump will self prime and push
air out of the taps and appliances that are
used at the other end. To let this air out
without causing damage it is important
that:
• All taps connected to the rainwater
system are turned on
• Toilets connected to the system are
flushed so the cistern fills and any air
is cleared from the line.
PRIMING PUMPS

14
RainBank does not need maintenance
but there are things you can do to ensure
its most reliable operation.
• Fit a “first flush” system that ensures
the first run of dirty rainwater does
not go into the tank.
• Clean your gutters and first flush
devices and ‘Y’ strainers regularly.
• Remove branches that over hang
your roof.
• Have a strainer fitted to your
rainwater tank inlet and regularly
check this for leaves and twigs, etc.
• You should also check for debris in
the bottom of your tank a few times a
year and clean this out if necessary.
A first flush system will greatly reduce
the need for this action.
IMPORTANT MAINTENANCE
PRECAUTIONS
• Davey pump motors are fitted with an
automatic thermal overload switch
that stops the motor if the motor
gets too hot to avoid damaging it.
This automatically re-starts the motor
when the temperature within the
pump has dropped to a safe level.
Constant tripping of this switch
indicates a problem e.g. Low voltage
at pump, etc.
This automatic thermal overload
switch can start the pump without
warning. Always disconnect the
controller and/or pump motor
from the electrical supply before
maintenance or repairs.
• Care should also be taken when
servicing or disassembling pump to
avoid injury from hot pressurised
water. Unplug the pump, relieve
the pressure by opening a tap on the
discharge side of the pump and allow
any hot water to cool before
attempting to dismantle.
• Do not use petroleum based fluids
or solvents (e.g. oils, kerosene,
turpentine, thinners, etc. on the
plasticor seal components).
• Do not use hydrocarbon based or
propelled sprays around the electrical
components of the controller.
• During servicing use only approved
non petrochemical based o-ring and
gasket lubrication. If unsure consult
your Davey Dealer for advice.
!
MAINTAINING RAINBANK

15
1. Water is still being used.
Check all taps, toilets and appliances
connected to RainBank system to
ensure they are turned off.
2. Water is leaking on discharge
side of RainBank system.
Check for leaks and repair.
SYMPTOM: PUMP WILL NOT SWITCH OFF
TROUBLE SHOOTING
RAINBANK
1. No power supply to pump.
Contact electrician and have power
restored.
2. No water in tank.
Check water level in tank.
3. Mains water supply not
connected to RainBank.
RainBank system must have a
pressurised water supply connected
to inlet. Press ‘manual override’
button to simulate mains water
flowing.
4. Mains supply to RainBank
turned off. Turn on mains water
supply. Press ‘manual override’
button to simulate mains water
flowing. Pump will start if rain water
is available.
5. Mains water flow is too low.
Ensure flow at most distant outlet is
above 5 litres per minute.
SYMPTOM: PUMP WILL NOT SWITCH ON

16
Mains water is still in use when
pump is running. Possible cause -
pump needs to be primed.
Mains water is still in use when
pump is running. Possible cause
- debris is caught inside RainBank
preventing plunger mechanism from
sealing completely.
Mains water is still in use when
pump is running. Possible cause -
pump impeller blocked. Have pump
serviced.
Mains water not passing through
RainBank. Possible cause - RainBank
installed backwards. Install RainBank
according to installation & operating
instructions. Arrow on top of RainBank
indicates direction of flow.
Mains water not passing through
RainBank. Possible cause - debris is
blocking inlet and or filters in or out of
RainBank.
In order of most likely solution:
1. Mains inlet stop valve closed
– open stop valve.
2. RainBank blocked – this is highly
unlikely, ensure 1 is checked first.
Mains water pressure and flow too
low. Possible cause - there is a check
valve or PRV installed between RainBank
and tank. Remove check valve or PRV
from plumbing.
Pump hums. Possible cause - pump is
jammed or seized. Have pump serviced.
Water leaking from connection
between pump and RainBank.
Possible cause - installer has failed
to fit connection kit correctly. Remove
RainBank and re-install connection kit.
Mains water filling up tank. Possible
cause - debris caught inside RainBank.
Pump takes more than 10 seconds
to turn on. This is anti-cycling software
that allows 1 start every 10 seconds.
OTHER SYMPTOMS:

17
WARNINGS
• Before installing your RainBank
controller, please read all instructions
carefully as failures caused by
incorrect installation or operation are
not covered by the guarantee. Your
RainBank controller is designed to
handle clean water. The system
should not be used for any other
purpose without specific referral to
Davey. The use of the system to
pump flammable, corrosive and other
materials of a hazardous nature is
specifically excluded.
• WARNING: Water freezing inside
the RainBank will damage the unit.
Locate your RainBank and pump
so that they are not susceptible to
freezing.
• RainBank must be installed and
serviced by a licensed plumber.
• Check with your local water authority
on water restrictions when your
rainwater tank is connected to mains
water.
• Do not enter a empty rainwater tank -
they may contain hazardous gases.
• Secure all openings to the rainwater
tank to ensure it will not permit
access to children.
• If the supply cord is damaged, it
must be replaced by manufacturer,
its service agent or similarly qualified
persons in order to avoid a hazard.

18
PLUMBERS TIPS
1. Fit first flush devices to all down pipes to ensure clean water inside the tank
(dirty tank water can stain toilets and clothes).
2. Clear swarf from all pipes and holes drilled into the tank (swarf can block valves,
RainBank and toilet valves).
3. Check with local council plumbing teams for backflow requirements.
4. Keep pipe work well braced as vibrations can become noisy.
5. Fill rainwater tank above float switch with garden hose to check system.
6. Make sure pump is full of water (primed) before leaving site. Flush all air out of
system by running pump with an outlet downstream open.

19
DAVEY GUARANTEE
Davey Repair or Replacement Guarantee
In the unlikely event in Australia or New Zealand that this Davey product develops any malfunction
within warranty periods beginning from the date of original purchase due to faulty materials or
manufacture, Davey will at our option repair or replace it for you free of charge, subject to the
conditions below.
Should you experience any difficulties with your Davey product, we suggest in the first instance that
you contact the Davey Dealer from which you purchased the Davey product. Alternatively you can
phone our Customer Service line on 1300 367 866 in Australia, or 0800 654 333 in New Zealand, or
send a written letter to Davey at the address listed below. On receipt of your claim, Davey will seek to
resolve your difficulties or, if the product is faulty or defective, advise you on how to have your Davey
product repaired, obtain a replacement or a refund.
Your Davey Guarantee naturally does not cover normal wear or tear, replacement of product
consumables (i.e. mechanical seals, bearings or capacitors), loss or damage resulting from misuse
or negligent handling, improper use for which the product was not designed or advertised, failure to
properly follow the provided installation and operating instructions, failure to carry out maintenance,
corrosive or abrasive water or other liquid, lightning or high voltage spikes, or unauthorized persons
attempting repairs. Where applicable, your Davey product must only be connected to the voltage
shown on the nameplate.
Your Davey Guarantee does not cover freight or any other costs incurred in making a claim. Please
retain your receipt as proof of purchase; you MUST provide evidence of the date of original purchase
when claiming under the Davey Guarantee.
Davey shall not be liable for any loss of profits or any consequential, indirect or special loss, damage
or injury of any kind whatsoever arising directly or indirectly from Davey products. This limitation
does not apply to any liability of Davey for failure to comply with a consumer guarantee applicable to
your Davey product under the Australian or New Zealand legislation and does not affect any rights or
remedies that may be available to you under the Australian or New Zealand Consumer Legislation.
In Australia, you are entitled to a replacement or refund for a major failure and for compensation for
any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or
replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Should your Davey product require repair or service after the guarantee period; contact your nearest
Davey Dealer or phone the Davey Customer Service Centre on the number listed on following page.
For a complete list of Davey Dealers visit our website (davey.com.au) or call.
Davey Guarantee Period
Rainbank - Three Years

* Installation and operating instructions are included with the product when purchased new.
They may also be found on our website.
AUSTRALIA
Customer Service Centre
6 Lakeview Drive,
Scoresby, Australia 3179
Ph: 1300 232 839
Fax: [phone]
Email: [e-mail]
Davey Water Products Pty Ltd
Member of the GUD Group
ABN 18 066 327 517
NEW ZEALAND
Customer Service Centre
7 Rockridge Avenue,
Penrose, Auckland 1061
Ph: 0800 654 333
Fax: [phone]
Email: [email protected]
® Davey is a registered trademark of Davey Water Products Pty Ltd. © Davey Water Products Pty Ltd 2021.
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