Rotex RVLQ05+08CA - User Manual

Questions and Answers

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Michael MeyersAug 18, 2025
What to do if Rotex Boiler burner does not ignite?
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  Richard AdamsAug 18, 2025
  If the burner does not ignite, here are some possible solutions: * Ensure the gas tap is open. * Remove any air from the gas pipe. * If the gas supply pressure is too low, contact the gas supply company. * Replace the ignition electrode if there is no ignition. * If there is no spark, check the cabling and spark plug cap, and replace the ignition unit if necessary. * Check and correct the gas/air adjustment. * For a faulty fan, check the wiring and fuse; replace the fan if needed. * Clean the fan if it's dirty. * If the gas valve is faulty, replace or re-adjust it.
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Joshua VanceAug 21, 2025
What to do if Rotex RVLQ05+08CA space heating does NOT reach the temperature?
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  Charles EatonAug 21, 2025
  If the space heating does not reach the desired temperature: * Check and adjust the weather-dependent setpoint setting on the user interface. * Increase the space heating temperature setting. * Ensure there is proper circulation in the installation by opening at least 2 or 3 radiators. * Adjust the boiler power setting for the installation. * Descale or flush the heat exchanger on the space heating side to improve heat transfer.
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Tyler FowlerAug 23, 2025
What to do if Rotex Boiler burner ignites noisily?
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  Heather KrauseAug 23, 2025
  If the burner ignites noisily: * Contact the gas company to check if the house pressure switch may be faulty, as the gas supply pressure may be too high. * Replace the ignition pin or check the ignition electrode gap if the ignition gap is incorrect. * Check and correct the gas/air adjustment. * Check the ignition gap, replace the ignition electrode, or replace the ignition unit on the gas valve if there is a weak spark.
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stacycampbellAug 26, 2025
What to do if Rotex RVLQ05+08CA Boiler has no space heating?
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  Sierra StoneAug 26, 2025
  If there is no space heating: * Check the user interface for heat pump errors. * Ensure the communication cable with the heat pump is properly installed. * Check the settings in the heat pump manual for any incorrect settings. * If the service display indicates the gas boiler is off, switch it on. * Check the wiring and connector X4 for current (24 V), and replace the faulty pump if necessary. * Replace sensor S1 or S2 if they are faulty and the burner does not fire on space heating.
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Shelley SteeleAug 27, 2025
What to do if Rotex RVLQ05+08CA has no domestic hot water?
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  Casey Stanley MDAug 27, 2025
  If there is no domestic hot water: * Check the wiring according to the diagram if there is no current at the flow switch (5 V DC). * Replace S3 if it is faulty and the burner is not firing on domestic hot water.
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Mackenzie GrayAug 30, 2025
Why does Rotex RVLQ05+08CA Boiler burner resonate?
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  Christopher RothAug 30, 2025
  The burner might resonate due to: * The house pressure switch may be faulty, resulting in gas supply pressure being too low, contact the gas company. * Recirculation of combustion gasses, check the flue gas and the air supply. * Incorrectly set gas/air adjustment, check the adjustment.
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xhickmanSep 1, 2025
What to do if Rotex RVLQ05+08CA hot water does NOT reach the temperature?
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  Angelica CostaSep 1, 2025
  If the hot water does not reach the desired temperature: * Adjust the inlet assembly if the domestic hot water flow is too high. * Set the hot water circuit on the heat pump user interface, depending on the desired temperature, if the temperature setting for the water circuit is too low. * Descale or flush the exchanger domestic hot water side if there is no heat transfer as a result of lime scale or fouling in the heat exchanger domestic hot water side. * The water inlet temperature is too low if the cold water temperature is below 10°C.
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Martin RodriguezSep 3, 2025
What to do if the Rotex Boiler burner does NOT ignite?
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  Nancy KelleySep 3, 2025
  If the burner on your Rotex Boiler fails to ignite, there are several potential causes and solutions: * Ensure the gas tap is open. * Remove any air from the gas pipe. * If the gas supply pressure is too low, contact your gas supply company. * Consider replacing the ignition electrode. * Check the cabling and spark plug cap, and if necessary, replace the ignition unit. * Ensure the gas/air adjustment is correctly set. * Inspect the wiring and fuse of the fan; replace the fan if needed. * Clean the fan if it is dirty. * Consider replacing or re-adjusting the gas valve.
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Laura WilliamsSep 6, 2025
Why is my Rotex Boiler space heating not reaching the desired temperature?
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  Felicia BishopSep 6, 2025
  If the space heating in your Rotex Boiler isn't reaching the set temperature, consider the following: * Verify the weather-dependent setpoint setting on the user interface and adjust if needed. * Increase the space heating temperature. * Ensure there is proper circulation in the installation by opening at least 2 or 3 radiators. * Adjust the boiler power if it hasn't been correctly set for the installation. * Descale or flush the heat exchanger on the space heating side to address any heat transfer issues due to lime scale or fouling.
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Cathy KentSep 8, 2025
What to do if the Rotex Boiler burner ignites noisily?
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  Melissa GordonSep 8, 2025
  If your Rotex Boiler's burner is igniting noisily, it could be due to several reasons: * The gas supply pressure might be too high, possibly indicating a faulty house pressure switch, in which case you should contact the gas company. * The ignition gap may be incorrect, requiring you to replace the ignition pin or check the ignition electrode gap. * The gas/air adjustment might not be correctly set. * A weak spark could be the issue, necessitating a check of the ignition gap, replacement of the ignition electrode, or replacement of the ignition unit on the gas valve.