Instruction manual

5-4 Type II Water System Thermo Scientific

Section 5

Maintenance and Servicing

It is recommended to replace RO carbon prefilter when replacing the RO

membrane. Refer to the “Carbon Filter Installation” section of this manual.

1. Turn off the Barnstead TII and disconnect it from the power supply.

2. Disconnect inlet feed water connection.

3. Locate the RO membrane(s) inside the left door (see Fig. 9).

4. Remove the old membrane(s) by disconnecting the reject and product

tubing from the top of the membrane and the feed water connection

from the bottom. See “Water Connection Details” for tubing removal

instructions.

5. Install new membranes per the “RO Membrane Installation” section of

this manual.

6. Reattach power cord and feed water supply.

7. Reset the membrane timer by following the “Timers” section of this

manual.

8. Proceed per “Membrane Rinse Up” section earlier in this manual.

Replace the 0.2 micron final filter whenever any of the following

conditions occur: the product water flow rate is reduced, when you

experience bacteria break through, when cartridges are replaced, or when

system is sanitized. The 0.2 micron final filter is shipped assembled with a

bell. To replace the 0.2 micron final filter assembly:

1. Remove the old 0.2 micron final filter assembly by turning it to the left

to unscrew it from the dispense valve.

2. Remove the new 0.2 micron final filter assembly from its bag and

insert it into the dispense valve. Gently tighten, turning the filter to the

right.

3. Open the dispense valve and flush at least 3 liters of water through the

0.2 micron final filter.

Note It is suggested that PTFE tape be applied to the threads of the 0.2

micron final filter to ensure a tight seal.

Membrane

Replacement

Micron Final Filter

Replacement