Xylem Heat Exchangers - Manual (Page 4)

1
If you have maintained the heat
exchanger in storage, thoroughly inspect
it prior to installation. Make sure it is
thoroughly cleaned to remove all preserva-
tion materials unless stored full of the same
oil being used in the system, or the coating
is soluble in the lubricating system oil.
If the exchanger was oil-tested by ITT
Heat Transfer and your purchase order
did not specify otherwise, the oil used
was Tectyl 754, a light-bodied oil which
is soluble in most lubricating oils. Where
special preservations were applied,
you should consult the preservative
manufacturer’s product information data
for removal instructions
.
2
If the heat exchanger is not being stored,
inspect for shipping damage to all
protective covers upon receipt at the
jobsite. If damage is evident, inspect for
possible contamination and replace
protective covers as required. If damage is
extensive, notify the carrier immediately.
3
When installing, set heat exchanger level
and square so that pipe connections can be
made without forcing.
4
Before piping up, inspect all openings
in the heat exchanger for foreign
material. Remove all wooden plugs, bags
of dessicant and shipping covers imme-
diately prior to installing. Do not expose
internal passages of the heat exchanger
to the atmosphere since moisture or
harmful contaminants may enter the unit
and cause severe damage to the system
due to freezing and/or corrosion.
5
After piping is complete, if support cradles or
feet are fixed to the heat exchanger, loosen
foundation bolts at one end of the exchanger
to allow free movement. Oversized holes in
support cradles or feet are provided for this
purpose.
6
If heat exchanger shell is equipped with
a bellows-type expansion joint, remove
shipping supports per instructions.
1
Be sure entire system is clean before
starting operation to prevent plugging of
tubes or shell side passages with refuse.
The use of strainers or settling tanks in
pipelines leading to the heat exchanger is
recommended.
2
Open vent connections before starting up.
3
Start operating gradually. See Table 1
for suggested start-up and shut-down
procedures for most applications. If in doubt,
consult the nearest ITT Heat Transfer
representative for specific instructions.
4
After the system is completely filled with the
operating fluids and all air has been vented,
close all manual vent connections.
5
Re-tighten bolting on all gasketed or packed
joints after the heat exchanger has reached
operating temperatures to prevent leaks and
gasket failures. Standard published torque
values do not apply to packed end joints.
6
Do not operate the heat exchanger
under pressure and temperature
conditions in excess of those specified
on the nameplate.
7
To guard against water hammer, drain
condensate from steam heat exchangers
and similar apparatus both when starting
up and shutting down.
8
Drain all fluids when shutting down to
eliminate possible freezing and corroding.
Installation at Jobsite
Operation
1.800.447.7700 www.itt.com
4
cautIon:
Dress properly for the job. You may need
any number of special items — safety
hat, safety shoes, goggles, heavy gloves,
ear protective devices, etc., for your own
protection. Find out what items are required
and wear them.
cautIon:
A heat exchanger is a pressure
vessel designed for operation at certain
specific limits of pressure and temper­
ature. The cooling or process system,
which includes the heat exchanger, must
be safeguarded with safety valves and
controls so that these heat exchanger
design conditions are not exceeded. All
operating personnel should be made
aware of these specific design pressures
and temperatures.
cautIon:
Many heat exchangers circulate fluids
which are irritating or dangerous to the
human system. These fluids could cause
problems if bolted or threaded joints are
not maintained in a leak­tight condition
at operating pressures, temperatures and
no­flow, ambient conditions.
If fluids are not irritating or dangerous, a
leak will at least cause a slippery situation
on the floor below.
Because one fluid in the heat exchanger
is at higher temperatures, any leaks might
cause burns.