Disposal - Riello SP20-DN32 Manuel D'utilisation Et D'entretien

Check the condition of the gaskets (correct position, overall
°
condition, elasticity). Reposition or replace the gaskets as need-
ed.
INTERNAL LEAKS WITH mixing of fluids
Contact your RIELLO consultant as quickly as possible.
PROBLEM
The fluids in the heat exchanger are mixing together at the unit's
outlet.
POSSIBLE SOLUTIONS
Make sure that the hydraulic connections are correct.
°
° Disassemble the heat exchanger and inspect the entire surface
of each plate for cracks and holes with penetrant. Replace any
damaged plates.
INCREASED PRESSURE DROPS
PROBLEM
The pressure drop is higher than the design value.
POSSIBLE SOLUTIONS
° Check the accuracy of the measuring instruments used.
° Test the operation of the pumps.
Fouling may be the cause. Clean the heat exchanger.
°
Circulate the fluids in the opposite direction to remove any
°
blockages in the pipes.
VARIATIONS IN TEMPERATURE
PROBLEM
The heat exchanger's outlet temperatures do not correspond to
the expected temperatures.
POSSIBLE SOLUTIONS
Check the accuracy of the measuring instruments used.
°
Fouling may be restricting the flow along the channels and re-
°
ducing the heat transfer capacity (drop in efficiency). Clean the
heat exchanger.

6 - DISPOSAL

• Disconnect the heat exchanger from its power sources and
wait until it has cooled fully.
• Drain the heat exchanger and collect the fluids in accordance
with environmental standards.
• Dispose of the gaskets in accordance with the prevailing legisla-
tion.
• Use the lifting systems employed when installing the heat ex-
changer.
• Check whether any part of the heat exchanger may be recycled
for another purpose.
Materials:
Consult the documentation provided with the order for informa-
tion on the materials used to fabricate the heat exchanger.
• Plates: stainless steel or titanium.
• Other metal components: carbon steel or stainless steel.
• Gaskets: NBR, EPDM, FPM, HNBR.
Insulation or plate protection materials: stainless steel + ceramic
or aluminium + polyurethane boards or cross-linked polyethylene.
ENGLISH
EN
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