AXEON BT-Series - Manual (Page 24)

24
BT – Series User’s Manual
MKTF - 206
06/12
PRE-FILTER PRESSURE GAUGES
These gauges measure the feed water pressure when it enters and exits the pre-filters.
A pressure differential of 10 - 15 psi or more on the two pressure gauges indicates that
the pre-filters require servicing. For example, if the inlet pressure is 40 psi, the filter
should be changed when the outlet pressure is 30 psi or below.
PERMEATE (PRODUCT) FLOW METER AND CONCENTRATE (WASTE) FLOW
METER
These flow meters indicate the flow rates of the permeate and concentrate water. The
measurements, when added together, also indicate the feed water flow rate or (total
flow rate); if the system is not equipped with a concentrate recycle valve.
CAUTION: EXCESSIVE RECYCLING MAY CAUSE PREMATURE FOULING
OR SCALING OF THE MEMBRANE ELEMENTS.
LOW PRESSURE SWITCH
The low pressure switch shuts off the system when the feed water pressure drops
below 15 PSI, preventing damage to the pump. The system restarts automatically when
there is a constant pressure of 35 PSI or more.
If you notice the pressure fluctuating, and the system cycling off and on,
turn the system off and ensure that proper feed flow and pressure are available to
the system.
PUMP BYPASS VALVE
This valve is installed as a standard feature on the BT-Series reverse osmosis systems.
It provides an adjustment for pump pressure, which will vary as the required system
pressure changes. As the feed water temperature decreases, and/or the feed water
TDS increases, the system will require a higher operating pressure to produce the
specified permeate flow. A BT system installed in Florida may provide the specified
permeate flow of 1.04 gpm at 100 psi; however the same system installed in Maine –
much colder feed water – may require 150 psi to produce the same amount of
permeate. Never exceed 150 psi.