Stulz SupraSteam SEH Series

Questions and Answers

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brandon42Aug 9, 2025
How to troubleshoot Stulz SupraSteam SEH that does not turn on?
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  Natalie SimonAug 10, 2025
  If your Stulz Humidifier doesn't turn on, here's what to check: * **Power:** Ensure the protection devices upstream from the humidifier are working and that there is power. * **Switch Position:** Verify the external switch on the humidifier panel is in the 'I' position, not '0'. * **Connectors:** Make sure all connectors are properly inserted into the terminal block. * **Fuses:** Inspect fuses F1/F2/F3 to see if they are broken and replace if needed. * **Transformer:** Confirm the voltage across the secondary winding of the transformer is 24Vac.
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Arthur TurnerAug 14, 2025
Why Stulz SupraSteam SEH does not start operation?
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  ghudsonAug 14, 2025
  If your Stulz Humidifier isn't starting, consider the following possible causes: * **ON/OFF Contacts:** Ensure the remote ON/OFF contacts (relay/terminals AB – AB or 7I – 8I) are closed. * **Humidistat Connection:** Check the external connection of the humidistat. * **Humidistat Fault:** The humidistat may be faulty and require replacement. * **Control Signal:** Ensure parameters A0, A2-A9 are set correctly. * **Probe Values:** Verify the values measured by the probe/s are not higher than the set points St and P7.
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xwilliamsAug 25, 2025
Why Stulz SupraSteam SEH Humidifier loads up water without producing steam?
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  William JoyceAug 25, 2025
  If your Stulz Humidifier is loading up water but not producing steam, check these potential issues: * **Steam Inlet Counterpressure:** High steam inlet counterpressure might be the problem. Make sure the steam inlet pipe is not folded or choked. * **Inlet Filter:** A clogged inlet filter to the cylinder can prevent steam production; clean the filter. * **Limestone:** Limestone buildup in the supply tank can cause this issue; clean the supply tank. * **Drain Solenoid Valve:** A malfunctioning drain solenoid valve could be the cause. Check for the anomalous presence of 24Vac on the drain solenoid valve and consider replacing the solenoid.
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elizabethburgessAug 29, 2025
What to do if Stulz Humidifier wets the duct?
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  Joyce LloydAug 30, 2025
  If the Stulz Humidifier is wetting the duct, consider the following: * **Distributor Installation:** Check that the steam distributor is installed correctly. It should not be too near the top of the duct, and the condensate return should not be blocked. * **System Size:** The system may be over-sized. Decrease the steam production set on the control. * **Fan Connection:** The humidifier may be active when the fan in the duct is off. Check the connection of the device (flow switch or differential pressure switch) slaving the humidifier to the ventilation in the duct (terminals AB - AB or 7I – 8I).
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Jeffrey TaylorSep 3, 2025
Why Stulz SupraSteam SEH Humidifier wets the floor below?
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  megan64Sep 3, 2025
  If your Stulz Humidifier is wetting the floor below, here are some possible reasons: * **Blocked Drain:** The humidifier drain might be blocked. Clean the drain in the bottom tank. * **Water Circuit Leaks:** There could be leaks in the supply water or overflow circuit. Check the entire water circuit. * **Condensate Drain Pipe Position:** The condensate drain pipe may not be bringing the water back to the supply tank correctly. Check the correct position of the condensate drain pipe in the supply tank. * **Steam Outlet Pipe Fastening:** The steam outlet pipe may not be properly fastened to the cylinder. Check the fastening of the pipe clamps on the steam outlet.
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Theresa SosaSep 10, 2025
What to do if thermal-magnetic overload switch is activated in Stulz SupraSteam SEH Humidifier?
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  George CastilloSep 12, 2025
  If the thermal-magnetic overload switch is activated on your Stulz Humidifier, it could be due to: * **Switch Rating:** The thermal-magnetic overload switch may be under-rated. Ensure it is rated for a current of at least 1.5 times the rated current of the humidifier. * **Over-current:** There might be an over-current at the electrodes. See the description for alarm EH for more information.