Di Standby Mode; Automatic Flush (Ro Membrane) - Thermo Scientific 1403 Series Operating Manual

Using your TII
DI Run Mode

DI Standby Mode

In STANDBY Mode, the DI pump will operate for ten minutes out of every hour (i.e 50 minutes
off, 10 minutes on). Every fourth time that the pump turns on, the UV lamp will also turn on for 10
minutes (i.e 3 hours 50 minutes off, 10 minutes on). This will allow the unit to produce high quality
water quickly upon being placed in the RUN Mode. It is recommended that the Thermo Scientific
TII be placed in STANDBY mode during non-work hours. At the end of the work day, press the
STANDBY switch to place the unit in STANDBY mode. Also, in STANDBY mode, the RO
operation automatically turns on to fill the reservoir as needed, and the RO system returns to
STANDBY once the reservoir is filled.
Figure 4-4 DI Standby Mode Screens -

Automatic Flush (RO Membrane)

In the Standby Mode, the Thermo Scientific TII will initiate a four minute automatic flush of the
RO membrane once every three hours and fifty-six minutes of operation. This prevents buildup on
the RO membrane. A timer in the Thermo Scientific TII counts the hours power is applied to the
unit. When the timer reaches three hours and fifty-six minutes, the Thermo Scientific TII initiates a
four minute flush if the unit is in the RUN or STANDBY Modes. If the unit is in IDLE, the
automatic flush will occur immediately after the START/STOP switch is pressed and RUN Mode
entered. The timer will reset to zero when the four minute automatic flush is completed.
4-4 TII Water System
a) DI and RO systems both in Standby,
b) DI system in Standby and RO system in Run.
Note Each time the RO system automatically turns ON, in RUN or STANDBY mode,
the RO membrane will flush water to the drain for 30 seconds prior to filling the reservoir.
Note If the unit is in STANDBY and power to the unit is turned off or lost, the unit will
return to STANDBY once power is restored.
Note Press the START/STOP switch to cancel a flush.
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