Davey RAINBANK PRO RAINWATER HARVESTING SYSTEM - Manual (Page 5)

5
ELECTRICAL POWER SURGE PROTECTION
An electrical power surge or spike can travel along the supply lines and cause serious damage to your electrical
equipment. The RainBank
® PRO controller fitted to this system has a metal oxide varistor (MOV) fitted to help protect its
circuit. This MOV is a “sacrificial” device, meaning that it is gradually damaged every time it takes a surge. The MOV is
not a lightning arrestor and may not protect the control unit if lightning or a very powerful surge hits the pump unit.
Degradation of the MOV is a non-warrantable failure. If the installation is subject to electrical power surges or lightning
we strongly recommend the use of suitable additional surge protection devices on ALL electrical equipment.
In accordance with AS/NZS 60335.2.41 we are obliged to inform you that this appliance is not intended for use by young
children or infirm persons unless they have been adequately supervised by a responsible person to ensure that they can
use the appliance safely.
PIPE CONNECTIONS
For best performance use pipes at least the same diameter as the pump’s inlet and delivery outlet opening. Larger
diameter pipe may be used to minimise resistance to flow when pumping longer distances.
Use unions at pipe connections to enable easy removal and servicing. Use sufficient tape to ensure an airtight seal but
don’t over tighten. To prevent strain on pump threads always support heavy inlet and outlet pipes. If there is a likelihood
that the water supply may contain solid particles such as pieces of plant or vegetable matter, a suction strainer should be
installed before the pump to avoid blocking of pump. Lay suction pipe at a constant gradient to avoid air pockets which
may reduce pump efficiency.
WHERE TO USE CHECK VALVES AND FOOT VALVES
Installations with flooded suction require a gate valve so water supply can be turned off for pump removal and servicing.
On installations with a suction lift a good quality foot valve with strainer is required. It is not recommended to fit both a foot
valve and the check valve in a suction lift installation.
FOR AUTOMATIC PRESSURE PUMPS INSTALLED WITH A MAINS PRESSURE
HOT WATER SYSTEM
To protect your system from damage caused by back pressure from hot water systems, you should always have installed
on the hot water inlet an approved non-return valve.
PRIMING AND OPERATION
1. After installing pump set shut the discharge gate valve.
2. Fill pump, suction line and discharge assembly with water via the priming ports. On flooded suction simply open
suction gate valve to the pump set. When full, fit priming plugs and hand tighten firmly.
3. Ensure an outlet nearest to the pump is open.
4. Ensure all valves in the suction line are open.
5. Switch pump on and partially open the discharge gate valve.
6. Prime should be established almost immediately and a strong flow of water should be evident from the outlet. Allow
water to flow for approximately 20 seconds to expel air.
7. If little or no flow is evident from the outlet, switch pump off at the power point and repeat from step 1 ensuring that
there is adequate supply of water available to the pump.
8. Once water flow has been achieved, shut the discharge isolation valve. The pump should slowly build up pressure (on
the gauge) and turn off at the appropriate cut-out pressure.
9. Check the pressure switch settings by opening and closing the discharge isolation valve slowly and reading pressure
on the pressure gauge. Adjust if necessary. Refer section on pressure switch.
10. To prime the discharge pipework, partially open discharge isolation valve and then systematically open & close all
outlets on the system to expel the air within the discharge pipework.
NOTE: Suction leaks are the largest cause of poor pump performance and are difficult to detect.
Ensure all connections are completely sealed using thread.
NOTE: Young children should be supervised to ensure that they do not play with the appliance.
Abrasive Materials
The pumping of abrasive materials will cause damage to the pressure system which will then not be
covered by the guarantee.