Riello Condexa PRO NA 75P User Manual (English)

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

Model	Condexa PRO NA 75P
Category	Boiler
Type	Condensing
Fuel Type	Natural Gas
Nominal Heat Output	75 kW
NOx Emissions	<20 ppm
Efficiency	95%
Water Temperature Range	30-80°C