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Bianco Rainsaver MK4E Installation and Operating Instructions
1. Introduction:
The Rainsaver MK4E is an Automatic Rainwater / Mains Water Changeover Device designed to
provide automatic mains back up for Pressure Pump supply systems.
The Bianco Rainsaver MK4E is designed to be installed in conjunction with a DAB or Bianco
surface mounted or submersible Pressure Pump supply system that is fitted with a FLOAT SWITCH
(except for the DAB DIVERTRON) as well as an independent PRESSURE AND FLOW
CONTROLLER with LOSS OF PRIME PROTECTION and AUTOMATIC RE-START.
WARNING! The Rainsaver MK4E is NOT A PUMP CONTROLLER!
2. General Specifications:
Controls pumps to a maximum 1.5 hp, 1.1 kW 240V.
0
Maximum water temperature (mains + pump): 40
C.
Maximum recommended continuous pump flow: 100 litres per minute.
Maximum recommended pump pressure: 800 kPa.
Maximum recommended mains inlet pressure: 800 kPa.
3. Operation:
The RainsaverMK4E supplies clean rainwater from a rainwater tank via an automatic pressure
system pump to toilets, laundry and garden taps in a household.
Mains water is also connected to the RainsaverMK4E as an automatic back up should rain water level be
too low, or if there is a power or pump* failure).
*Should there be a pump failure, mains back up is achieved by turning the RainsaverMK4E off at the
power point.
The low voltage float switch supplied prevents the pump from running dry and allows automatic switch
over to mains supply should the rain water level in the tank be too low.
4. Installation:
4.1 Pump Float Switch installation.
The 10m, 12V DC low voltage float switch supplied, prevents the pump from running dry and allows
automatic switch over to mains supply. It is supplied complete with a counterweight and water tank
mounting plate, and is designed to enter the rainwater tank from the roof of the rainwater tank.
Choose a location on the roof of the rainwater tank to cut the 85mm hole required. The centre of the
hole should be at least 200 mm away from the side of the tank as well as being 200mm away
horizontally from tank rainwater entry and rain water tank outlet. Any shavings should be removed
with a vacuum cleaner.
Uncoil and lay out the float switch cable. Move the counterweight so that it is 200 mm from the float
switch. Tighten the cable gland on the counterweight to lock it in position.
Position the float switch cable in the water tank mounting plate so that the distance between the
mounting plate and the end of the float switch is 100 mm less than the depth of the tank when
measured from the float switch access hole, and tighten the cable gland and conclamp.
Submersible pumps supplied with the RainsaverMK4E may have a pump mounted float switch which
needs to be cable tied so that it is always in the vertical position.
INSTRS110110 rev 6 01/03/15
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