Carel heaterSteam UR Series User Manual (English)

Questions and Answers:

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evansrebeccaAug 3, 2025
What to do if my Carel heaterSteam UR Humidifier control does not turn on?
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  grayangelaAug 3, 2025
  If the control on your Carel Humidifier doesn't turn on, several issues could be the cause. First, check the protection devices upstream of the humidifier and the mains power supply to ensure there is electrical power. Next, verify that the humidifier's external switch is in the 'I' (ON) position. Also, check that the connectors are properly installed on the terminal block. Inspect fuses F1/F2 to see if they are blown. Finally, confirm that the transformer's secondary circuit has an output of 24 Vac.
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Janet RossAug 8, 2025
Why Carel Humidifier does not start?
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  Keith HenryAug 8, 2025
  If your Carel Humidifier isn't starting, consider these potential causes: * Ensure the remote ON/OFF contact is closed (relay/terminals 7I - 8I). * Verify the external regulator/humidistat or probe is correctly connected. * Check the external signal for any probe/humidistat malfunctions. * Make sure the programming parameters are set correctly. * If the safety thermostat is activated, reset it after identifying and resolving the underlying issue. * If it is H or T control, reset the fan circuit breaker after addressing the problem.
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mitchelljeremiahAug 13, 2025
What to do if the line circuit breaker is activated for Carel Humidifier?
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  gutierrezlaurenAug 13, 2025
  If the line circuit breaker for your Carel Humidifier is activated, it could be due to two reasons. First, the line circuit breaker may be rated too low; ensure it's rated for a current of at least 1.5 times the humidifier's rated current. Second, resistors might be short-circuited; check the value of the resistors and replace them if necessary.
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Tracy LambAug 18, 2025
How to fix a Carel Humidifier that fills with water but doesn't produce steam?
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  Jill GarciaAug 18, 2025
  If your Carel Humidifier fills with water but doesn't produce steam, consider the following: 1. Check that the steam outlet pipe is not bent or choked, as steam outlet back-pressure might be too high. 2. If there are leaks in the water circuit, replace the feeding solenoid valve and, if required, clean or replace the level gauge due to a leaking flow regulator in the water fill electrovalve. 3. Clean the filter to address any level control malfunction. 4. Clean the fill tank if the cylinder inlet filter is blocked. 5. Check for the presence of 24Vac at the drain solenoid valve and clean the drain solenoid valve if there is lime in the fill tank.
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Ronald MoralesAug 23, 2025
Why is my Carel heaterSteam UR wetting the duct?
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  Mark RobinsonAug 25, 2025
  If your Carel Humidifier is wetting the duct, it could be due to a few reasons. First, check that the steam distributor has been installed correctly. Second, the system may be rated too high, so reduce the steam production set on the control. Lastly, ensure the humidifier isn't active when the duct fan is off by checking the connection of the device (flow switch or differential pressure switch) linked to the humidifier for ventilation in the duct (terminals 7I - 8I).
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Carrie MorrowAug 28, 2025
What causes a Carel heaterSteam UR Humidifier to wet the floor below it?
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  Daniel WilliamsAug 28, 2025
  If your Carel Humidifier is wetting the floor below, there are several potential causes. First, clean the drain pipe in the bottom tank, as the humidifier drain pipe may be blocked. Second, check the entire hydraulic circuit for leaks in the water supply or overflow circuit. Third, ensure the correct positioning of the condensate drain pipe in the fill tank, as the condensate drain pipe may not be draining the water back to the fill tank. Finally, check the fastening of the pipe clamp on the steam outlet pipe, as the steam outlet pipe may not be properly attached to the cylinder.

Carel heaterSteam UR Series Specifications

General

Model	heaterSteam UR Series
Category	Humidifier
Frequency	50/60 Hz
Protection Rating	IP21
Type	Steam humidifier
Communication	Modbus, BACnet
Water Type	Demineralized water
Water Conductivity	125 to 1250 μS/cm
Operating Temperature	5 to 40 °C
Operating Humidity	10 to 90% RH
Water Connection	1/2 inch
Housing Material	Metal