Cleaning - Process Technology LUFRAN Instruction

CLEANING:

The Lufran fluoropolymer inline water heater was thoroughly cleaned prior to shipment.
The inlet/outlet plumbing connections were sealed and the heating columns were
charged with nitrogen gas prior to shipment. PROCESS TECHNOLOGY recommends
that, at a minimum, the following steps be taken to remove any contamination that may
have been added to the system during installation. Additional steps may be required for
certain applications. For sanitization procedures, contact your DI Water system suppler
for their recommendations. The bypass to the DI recirculation loop should be installed
as close as possible to the process tank. Confirm that the bypass plumbing will be able
to withstand the maximum temperature and pressure that will be generated by the
system.
This procedure should only be performed by qualified technicians.
1) Allow DI water to flow through the unit unheated with the maximum possible flow
rate for one (1) hour. The effluent should be directed to the drain.
Note: In order to prevent damage to the heater coils, the purge system must be
operated any time there is fluid inside the heater column.
2) If the DI Water Heating System includes the resistivity monitor (-RM on the model
number), remove the resistivity cell after one (1) hour of flushing and rinse
independently with a liberal flow of DI Water. Replace cell after rinsing.
3) Turn ON the heater and set the operating temperature at 70°C
4) Allow the unit to run at the maximum attainable flow rate for at least three (3) hours
at elevated temperature.
5) Sanitize the system. Refer to the material compatibility chart to verify that the o-ring
material will not be damaged by the sanitizing chemicals.
6) Proceed with normal operation after sanitizing and rinse procedures are completed.
Notes: The time required for absolute clean up of the system will be dependent on DI
Water quality, flow rates, and installation techniques.
System Sanitizing:
Consult your DI Water equipment supplier to determine a method of sanitizing that will
be compatible with all of the materials used throughout the system.
M-43-01
Revision - Date: 08 – 04/06/15
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Lufran Single Outlet Manual