Instruction manual

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 Barnstead 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.

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.

In the Standby Mode, the Barnstead 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 Barnstead TII counts the hours power is applied to the unit.

When the timer reaches three hours and fifty-six minutes, the Barnstead

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.

Note Press the START/STOP switch to cancel a flush.

4-4 Type II Water System Thermo Scientific

Section 4

Using Your TII

DI Standby Mode

(a) (b)

Figure 4-4. DI Standby Mode Screens - a) DI and RO systems both in Standby,

b) DI system in Standby and RO system in Run.

Automatic Flush

(RO Membrane)