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V. TrOubLESHOOTIng:
Refer to Table 5 for common problems and troubleshooting techniques for the vaporizer system. For
questions please consult Hydro Instruments.
TAbLE 5: Troubleshooting Chart
Problem
Probable Cause(s)
Corrective Action
• Liquid chlorine in
vacuum piping
• Damaged vacuum
piping and equipment
(vacuum regulator)
• Demand has exceeded design capacity
• Fouling of pressure chamber
• Faulty chlorine temperature or
pressure sensor did not allow PRV to
close
• Supply pressure too high
• Low water temperature/level and
failed switches
• By-pass piping through PRV is open
• Lower capacity to within design flow
rate
• Clean inside and outside of chlorine
pressure chamber (follow appropriate
shut down and cleaning procedures)
• Reduce cylinder pressure
• Check and replace equipment.
• Check that by-pass piping is not open
• High pressure in
chlorine pressure
chamber
• Inlet chemical pressure is too high
• Valves closed before and after
vaporizer
• Blockage in supply line
• Lower the room temperature or
decrease the amount of gas padding.
• Open the supply valves
• Evacuate and shut down system.
Clean/replace piping
• Leaking chlorine
through pressure relief
valve (pressure switch
activated)
• Rupture disc has burst due to
overpressure
• Follow long term shutdown to
evacuate chemical. Replace rupture
disc
• Pressure switch
activated from
expansion chamber
assembly
• High pressure in
liquid pipeline
• Rupture disc has burst due to
entrapment of liquid chlorine
• Follow the long term shut down
procedure and replace the broken
rupture disc
• High water
temperature
• Failed/improperly wired temperature
control circuit
• Failed/improperly wired heater
• Check wiring. Replace equipment if
correct