Xylem BrazedPlate Heat Exchangers - Manual (Page 4)

If the heat exchanger is
excessively fouled and it cannot
be cleaned by commercial cleaning
methods, then replacement of the unit
is suggested.
NOTE: Use in accordance with
the manufacturer’s instructions and
check that cleaning compounds are
compatible with the materials of the
heat exchanger. Since there are a
wide variety of cleaning compounds
available which are compatible
with certain metals and alloys, it
is recommended that you contact a
representative of the above
commercial cleaning products
to determine which particular
cleaning fluid they would
suggest for your type of
scaling problem.
For more information, please contact:
175 Standard Parkway • Cheektowaga, NY 14227
800/447-7700 Fax: 716/897-1777
www.itt.com
Heat Transfer
Clean exchangers subject to
fouling (scale, sludge deposits,
etc.) periodically, depending on specific
conditions. A sludge or scale coating
on the plates can reduce effectiveness.
A marked increase in pressure drop
and/or reduction in performance usually
indicates cleaning is necessary.
A s s u g g e s t e d u n d e r
“Operation”, the use of a
strainer is recommended if the fluid
quality is poor (extensive dirt, debris,
and contaminants). If the fluids are
relatively clean, there should be little
problem with fouling so periodic
cleaning is adequate.
Maintenance
2.
4.
1.
Some suggested methods of
cleaning either side of the heat
exchanger are listed below:
n Back flush with a high pressure stream
of hot water to remove loose deposits.
n Circulating hot wash oil or light
distillate will usually effectively remove
sludge or similar soft deposits.
n A 5% solution of Phosphoric Acid or
Oxalic Acid may be effective in
removing more stubborn deposits.
For optimum results, the solution
should be in a back flush type flow
pattern. Rinse heat exchanger with
clean fresh water after use. It is
recommended that the refrigerant
circuit not be chemically cleaned.
3.
When the heat exchanger is cleaned, it is
important that full characteristics of the fouling
material and the cleaning agent be known and
care exercised in handling them according to
instructions. Use eye protection to prevent
damage to your eyes. Wear a respirator when
required.
CAUTION:
Do not exceed design conditions of heat
exchanger during operation or maintenance.
CAUTION:
Brazed plate heat exchangers have exposed
sharp metal surfaces. Protective gloves are
recommended during handling.
CAUTION:
Warranty
Seller warrants only that it will furnish by freight a replacement for, or at its option
repair, any product of its manufacture or part or portion thereof, proved to its
satisfaction to be defective in material or workmanship under normal use and service
within one (1) year from the date all other equipment or part thereof is first placed
in use, or two (2) years from the date of shipment, whichever shall be less. See ITT
terms and conditions of sale for details.
Lit# 104-65 (4/07)
© 2007 ITT