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Pressure Gauges
Standby Mode
Thermo Scientific
There are 4 pressure gauges on the Thermo Scientific RO system. The
functions of the gauges are to provide you the necessary information, to
monitor system performance as well as when certain maintenance
procedures should be accomplished. The pressure gauges are located in the
inside of the right front door. The 4 gauge functions are as follows:
1. Prefilter Inlet - Provides you with incoming water pressure and is used
in conjunction with the prefilter outlet gauge to determine when it is
time to change the prefilter.
2. Prefilter Outlet - Provides the pressure reading of the water exiting the
prefilter. If there is a 5 psig pressure differential between this reading
and the prefilter inlet reading, or if there are visible particulates in the
second position, MPS filter, the prefilter should be replaced.
3. Carbon Outlet - Provides the pressure reading of the water exiting the
carbon cartridge. If there is a 10 psig pressure differential between this
reading and the prefilter outlet reading, the carbon filter should be
replaced. The carbon filter should also be replaced when the "Replace
Carbon Filter" LED illuminates.
4. Membrane Pressure - Provides a reading of the membrane pressure.
The gauge should read 40 psig, ±10 psig, during normal operation.
When the water level reaches the top float of the Storage Reservoir, or
other reservoirs with properly configured float switches, the RO unit goes
into standby.
When the water level falls below the middle float in the 30 liter storage
reservoir or lower float in the 100 liter reservoir or other auxiliary tank, the
RO system resumes normal automatic operation. Pressing the ENTER/
RESTART button when the unit is in Standby and the Reservoir High
LED is not lit will cause the unit to enter operating mode. The display's
green "Operating/Standby" LED light will blink when the storage reservoir
is full, indicating the unit is in standby. If the unit is idle for 3 hours 56
minutes during the "Standby Mode," the unit automatically performs a 4-
minute membrane flush. The display's green "Unit Flushing" LED light
will be lit during this time.
Note The RO system is designed to be energized at all times. Do not turn
off the RO system during nonwork hours. Doing so will allow bacterial
growth and may damage the RO membrane(s).
Section 7
Section title
s
Reverse Osmosis System
7-3
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