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Riello Condexa PRO NA 75P - User Manual

Riello Condexa PRO NA 75P
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cod. 20144490 rev. 0
09/2018
9
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids or other combustible materials in
the vicinity of this or any other appliance. To do so
may result in an explosion or fire.
What to do if you smell gas:
- Do not try to light any appliance;
- Do not touch any electrical switch; do not use any
phone in your building;
- Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions;
- If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
This manual should be maintained in legible
condition and kept adjacent to the boiler or in a safe
place for future reference.
Condexa PRO NA 75 P
Condexa PRO North America
INSTALLATION, OPERATION AND SERVICE MANUAL

Table of Contents

Questions and Answers

  • K
    kimloriAug 15, 2025
    What to do if my Riello Boiler triggers the water high limit error?
    • O
      Omar WoodAug 15, 2025
      If your Riello Boiler is triggering the water high limit error, consider these potential causes: * There might be an issue with water flow. Ensure the water high limit is working properly, and the temperature setting is correct. Also, check the electrical wiring is not disconnected and the position of the sensor. * There might be an issue with the boiler system adjustment. Check that the auto air vent is bleeding properly and the heating circuit pressure.
  • P
    phallAug 18, 2025
    What to do if Riello Boiler has ignition delays with pulsating at the burner?
    • K
      Katrina FreyAug 18, 2025
      If your Riello Boiler experiences ignition delays with pulsating at the burner, it could be due to: * Incorrect burner gas pressure, so check the setting. * Issues with the ignition electrode, so check its positioning and condition.
  • G
    gavin70Aug 21, 2025
    Why is my Riello Condexa PRO NA 75P at temperature but the heating system is cold?
    • S
      Suzanne PeckAug 22, 2025
      If your Riello Boiler is at temperature but the heating system remains cold, it could be due to several reasons: * There might be air trapped in the system, in which case you should bleed the system. * The pump might be malfunctioning. Try checking and unseizing the pump, and if necessary, replace the circulator or check its electrical connection.
  • W
    William LunaAug 25, 2025
    Why does my Riello Boiler become dirty very quickly?
    • V
      Vincent RobertsAug 25, 2025
      If your Riello Boiler becomes dirty very quickly, the cause might be related to combustion. Perform a combustion analysis to assess the combustion quality.
  • M
    Morgan HernandezAug 28, 2025
    Why does my Riello Boiler circulator not start?
    • W
      wgilbertAug 28, 2025
      If the circulator in your Riello Boiler isn't starting, it could be due to a malfunctioning pump. Try to check and unseize the pump. If that doesn't work, consider replacing the circulator or checking its electrical connection.
  • B
    blackwellwilliamSep 1, 2025
    What causes irregular combustion in a Riello Boiler?
    • F
      ffoleySep 1, 2025
      Irregular combustion in your Riello Boiler can stem from several factors: * Incorrect burner gas pressure, so check the setting. * Incorrect orifci e installed, so check the diameter. * A dirty burner and heat exchanger, so clean them and perform a combustion analysis. * Obstructed heat exchanger passages, so clean the burner and heat exchanger and perform a combustion analysis. * A faulty fan, so check its operation and replace it if necessary.
  • E
    erichaynesSep 4, 2025
    What causes frequent tripping of the low water cutoff in a Riello Boiler?
    • S
      strongloriSep 4, 2025
      Frequent tripping of the low water cutoff in your Riello Boiler can be caused by: * A system pressure relief valve that is out of calibration, ensure it is properly calibrated and that the low water cutoff is functioning correctly. * Incorrect system pressure, so check the system pressure and pressure reducer functioning.
  • W
    Whitney GriffinSep 7, 2025
    How to check gas leaks in Riello Boiler?
    • M
      Melanie RyanSep 7, 2025
      If you smell gas, it could be due to leaks in the gas supply circuit. Check the seal of the gaskets and the pressure test ports/taps for leaks.
  • R
    Ronnie GraySep 12, 2025
    Why does my Riello Condexa PRO NA 75P Boiler smell of unburnt gas?
    • M
      mmartinSep 12, 2025
      If you notice an odor of unburnt gas from your Riello Boiler, it could be due to issues within the flue gas circuit. Check the gasket seals, ensure there are no obstructions, and verify the combustion quality.

Riello Condexa PRO NA 75P Specifications

General IconGeneral
ModelCondexa PRO NA 75P
CategoryBoiler
TypeCondensing
Fuel TypeNatural Gas
Nominal Heat Output75 kW
NOx Emissions<20 ppm
Efficiency95%
Water Temperature Range30-80°C

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