CG-SVX039C-GB
39
Evaporator Piping
Evaporator water connections are grooved. Thoroughly
flush all water piping to the unit before making the final
piping connections to the unit.
Components and layout will vary slightly, depending on
the location of connections and the water sources.
CAUTION Equipment Damage! If using an acidic
commercial flushing solution, construct a temporary
bypass around the unit to prevent damage to internal
components of the evaporator.
CAUTION Proper Water Treatment! The use of untreated
or improperly treated water in a chiller may result
in scaling, erosion, corrosion, algae or slime. It is
recommended that the service of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required. Trane assumes
no responsibility for equipment failures which results
from untreated or improperly treated water or saline or
brackish water.
Drainage
Locate the unit near a large capacity drain for water
vessel draining down during shutdown or repair.
Condensers and evaporators are provided with drain
connections. Refer to “Water Piping.” All local and
national codes apply.
Water Treatment
In the evaporator the following material are in contact
with water:
• Plate material: AISI 316 EN 10028-7 - 1.4401
+2B/2R
• Connection: AISI 316 EN 10272 -
1.4401/1.4404/1.4435/1.4436 - 1E
• Braze alloy: EN-13388, ISO Copper CU-HCP
In Shell and Tube evaporator the following material are
in contact with water:
• Copper tube
• Carbon steel
• Polypropylene baffles
• EPDM rubber gaskets on baffles
• Stainless steel rivets
• Tie rod in carbon steel with galvanized finish
for the heater, the copper ring gaskets.
When the unit is supplied with hydraulic module, the
following additional materials are in contact with water:
• Pump frame and connections are made of cast
iron
• Water pipes are made of carbon steel
• Pipe sealings are made of EPDM rubber
(ethylene propylene diene monomer rubber)
• Pump sealings are made of silicon carbide
• Straine
r is made of stainless steel
Dirt, scale, products of corrosion and other foreign
material will adversely affect heat transfer between the
water and system components. Foreign matter in the
chilled water system can also increase pressure drop and
consequently, reduce water flow. Proper water treatment
must be determined locally, depending on the type of
system and local water characteristics.
Neither salt nor brackish water is recommended for use
in Trane air-cooled chillers. Use of either will lead to an
unpredictably shorter life cycle. Trane encourages the
employment of a reputable water treatment specialist,
familiar with local water conditions, to assist in this
determination and in the establishment of a proper water
treatment program.
If calcium chloride is used for water treatment, an
applicable corrosion inhibitor must also be used. Failure
to do so may result in damage to system components.
Do not use untreated or improperly treated water.
Equipment damage may occur.
Standard Piping
Piping components include all devices and controls
used to provide proper water system operation and unit
operating safety.
Reverse Water Flow Piping
Water flow direction on evaporator is from up to down
for units in standard efficiency and water flow direction
is from down to up for units with heat option.
Standard Reverese Water Flow
Standard Reverese Water Flow
CXAF Refresh without pump package
CXAF Refresh with pump package
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