AP-134
Thermo Scientific Cooling Water System:
Cleaning/Flushing Procedures
Analytical Procedure
The Thermo Scientific Chemical Kit (part #:
610000000005) consists of a
corrosion/scale inhibitor (Product #: 460-
Thermo100) and a biocide (Product #:
7330).
The Thermo Scientific Chemical Kit is
designed to treat cooling water systems
up to 10-gallons in volume.
Larger systems will require additional kits at
10-gallon intervals to maintain the chemical
treatment program (for example, a 20-gallon
system would require two kits).
DETERMINING THE CORRECT
APPLICATION
Because the Thermo Scientific Chemical Kit
can be used in different applications,
determining which application you will need
is critical to the success of the procedure.
The guidelines for choosing the proper
procedure for your needs are as follows:
If you are using the Thermo Scientific
Chemical Kit in a new system that needs to
be treated prior to normal operation, follow
the procedure listed in the End User Startup
of a New System section.
If you are using the Thermo Scientific
Chemical Kit to conduct a routine
maintenance flushing of an existing cooling
water system, follow the procedure listed in
the Semiannual Water Change section.
If you are using the Thermo Scientific
Chemical Kit at the startup of an existing
cooling water system that has had no
previous treatment or a different chemical
treatment, follow the procedure listed in the
Flushing and Startup for an Existing System
section.
If you are an original equipment
manufacturer using the Thermo Scientific
Chemical Kit in a new system that has not
yet been shipped or stored, follow the
procedure listed in the Pre-ship Test/
Passivate section.
END USER STARTUP OF NEW SYSTEM
Purpose
The cooling water systems in new units
need to be treated before initiating normal
operation and treatment. The following
procedure will delineate the procedure for
starting up the new cooling water system
and improve system performance and
reliability.
Procedure
1. Confirm the unit is ready for operation.
2. Fill the cooling water system with
deionized (DI), distilled or Reverse
Osmosis (RO) water and circulate for
several minutes. Repair any leaks before
proceeding.
3. Add the contents of the bottle labeled
460-Thermo100. Circulate for 10-15
minutes.
4. Add the contents of the bottle labeled
NALCO 7330.
5. Attach the Fluid Replacement Reminder
sticker to a prominent location on the unit.
Sign and date the sticker noting when the
system was treated and a scheduled date
for the next treatment.
6. The system is now ready for use.
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