4 - SG2 Pure Water System Operation and Maintenance Manual
8. Operating Without Power
If your tap pressure is sufficient to run the system
or electricity is not available, you can run your SG2
without power. A minimum tap pressure of 50 psi
is needed to push the water through the system,
but 80 is preferred. Water should flow freely through
the pump, but the position of the vanes in the pump
could block the free flow of water while not running.
After checking to ensure that water is reaching the
pump, quickly turning the pump on and off will move
the vane and allow water to flow freely through the
pump again.
Alternately you can bypass the pump by
disconnecting the 16” connection hose from the
top of the RO and the 24” connection hose from the
pump. Use the 24” connection hose to connect the
top of the RO housing with the top of the Carbon
Sediment filter. This effectively plumbs your SG2 like
an SG1.
7. Pump Operation
Your SG2 system comes with a direct drive rotary vane
pump. This pump has graphite vanes which push the
water through your system. Do not run the pump dry.
Running the pump without water could result in damage
to these vanes and a loss of pump function.
When running the pump, abc recommends that you
don’t shut off the valve on the pole tubing quick
connect or the outflow of water anywhere on the
pole. This also includes restricting flow of the outgoing
pure water. A restriction or shutoff can allow more of
the pressure before the RO housing to travel through
the membrane and into the DI filter. The RO housing is
able to handle more pressure than the DI filter and the
resulting pressure transfer can damage the DI filter. If
you wish to shut off the flow of water out of your pole
while the motor is running, make certain to set your
bypass valve so that the max system pressure doesn’t
exceed 120 psi.
6. Inline Pressure Gauge
The SG2 comes with an inline pressure gauge. You can
move the inline to any of the garden hose connections
on the system to take readings. We recommend you
attach the pressure gauge to the inlet of the DI filter
cartridge. This pressure should be between 90 and 110
psi while the motor is running. Do not run system with
the DI filter pressure above 120 PSI.
Your tap pressure can be measured anywhere in
the system. Do not attempt to measure the tap
pressure with the motor running. With the source
water flowing, close the bypass valve and the shutoff
valve on the pole tubing quick connect. The resulting
pressure is your tap pressure.
abc recommends that for normal use, you should leave
the gauge attached to the system outlet on top of the
DI as instructed by the Initial Setup. This will allow you
to monitor the pressure of your DI filter and ensure that
it doesn’t go above 120 psi. We do not recommend
using the shutoff valve with the pump running as
this can cause the pressure to build up in the DI filter
cartridge. Check the pressure throughout the day to
ensure that it does not exceed 120 psi. To reduce
pressure on the DI, remove restrictions downstream
(kinked pole tubing for example) and open the bypass
valve.
