Davey RAINBANK WITH SUBMERSIBLE PUMP - Manual (Page 6)

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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 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.
Mains water is still in use when
pump is running. possible cause -
pump needs to be primed. stop pump
and remove priming plug from front top of
pump (right above water inlet) and allow
all air to escape from pump. replace the
priming plug when water dribbles out of
hole (see page 26).
Mains water is still in use when
pump is running. possible cause
- debris is caught inside rainbank
preventing plunger mechanism from
sealing completely. contact your plumber
to fit a ‘Y’ strainer to system between tank
& rainbank.
Mains water is still in use when
pump is running. possible cause -
pump impeller blocked. have pump
serviced. Fit first flush devices and ‘Y’
strainer to pipework.
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 to rainbank ® . remove
rainbank ® and clean inlet. check all
filters are clean.
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. check all filters in
plumbing are clean.
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 ® .
Install first flush devices and ‘Y’ strainer.
Green light flashing.
boot-up sequence only.
Red light flashing. pump has lost prime
and needs to be filled with water, see page
26. pump will automatically retry at: 1, 5,
30, 60 and 120 minute intervals.
Pump takes 10 seconds to start. this
is anti-cycling software that allows
1 start every 10 seconds.
OTHER SYMPTOMS: