5
Evaporative coolers, RO filters and extra draw-off capacity
Where a Torrium2 equipped pump is required to supply water to an evaporative cooler,
reverse osmosis (R.O.) filter or similar low flow device, the Torrium2 will detect the
limited demand. This will result in the Torrium2 adapting to the slow demand. The pump
start pressure will be allowed to drop to a lower cut in pressure each time low flows are
detected. To provide the maximum draw-off from the additional pressure tank, the tank’s
pre-charge should be set at 45% of the pump shut-off pressure.
If normal flow is required from your system, Torrium2 will initiate instant start.
Fit the Supercell pressure tank downstream of the controller.
DO NOT USE THREAD SEALING COMPOUNDS, HEMP OR PIPE DOPE!
Suction Lines / Lift
The Torrium2 controller has an in-built non-return (check) valve fitted. In flooded suction
installations there is no need to have a suction non-return valve.
Installations with flooded suction require a gate or isolating valve so water supply can be
turned off for pump removal and servicing.
In suction lift installations a footvalve will normally be required for the pump to retain prime.
In some suction lift installations there may be good reason to remove the o-ring from the
inbuilt check valve to ensure that the discharge pressure is also applied to the suction
line and footvalve. (NOTE: The check valve, minus the o-ring, needs to be replaced in the
Torrium2 controller to properly direct water flow over the flow sensor.) Removing the o-ring
from the inbuilt check valve could be where the suction line was very long or where there
was concern regarding a leaking footvalve. This may not always be applicable and it is
acceptable to retain the inbuilt check valve in the Torrium2 on suction lifts with good suction
plumbing.
Should the o-ring of the inbuilt check valve be removed though, an additional accumulator
should be fitted to the discharge pipework as applicable, to ensure the pump is not cycled
on shut down. The size of this accumulator will depend on the size, length and type of
pipe used on the suction.
Abrasive Materials - The pumping of abrasive materials will cause damage to the
pressure system which will then not be covered by the guarantee.
Discharge Connections
The Torrrium2 offers the option of using one or both outlet options.
Use of the horizontal outlet only allows for either:
1. Easy access to prime the pump and / or the removal of the inbuilt Torrium check valve
2. Fitment of a pressure tank (up to 20 litre capacity) onto the priming port / vertical
discharge port.
For optimal draw off, see section on “Extra Draw-off Capacity.”
If you use the vertical outlet instead or as well, you need to consider access to the inbuilt
check valve in the Torrium. Davey suggest you use a flexible connection and / or union
connection to allow for ease of access to the check valve.
