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Carel heaterSteam UR020 - User Manual

Carel heaterSteam UR020
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High Efficiency Solutions
heaterSteam - UR
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
Electric resistance humidifi er
User manual

Table of Contents

Questions and Answers

  • C
    Catherine WhiteAug 8, 2025
    What to do if my Carel heaterSteam UR020 control does not turn on?
    • J
      James MeyersAug 8, 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.
  • H
    Heidi BennettAug 12, 2025
    Why Carel heaterSteam UR020 Humidifier does not start?
    • T
      Tami EdwardsAug 13, 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.
  • T
    tharrisAug 17, 2025
    What to do if the line circuit breaker is activated for Carel heaterSteam UR020 Humidifier?
    • L
      Lisa NelsonAug 18, 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.
  • G
    Gary CarsonAug 23, 2025
    How to fix a Carel heaterSteam UR020 Humidifier that fills with water but doesn't produce steam?
    • L
      Lisa StantonAug 23, 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.
  • M
    Michael LopezAug 28, 2025
    Why is my Carel heaterSteam UR020 Humidifier wetting the duct?
    • M
      Mary AustinAug 28, 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).
  • J
    Jacqueline RoseSep 1, 2025
    What causes a Carel heaterSteam UR020 to wet the floor below it?
    • R
      Rebecca YangSep 2, 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.

Summary

General Safety Warnings

Electrical Safety Precautions

Covers electric shock, cable management, and grounding requirements for safe operation.

Water and Burn Hazards

Addresses risks associated with water leaks and high-temperature steam burns.

Introduction and Installation

Unit Positioning

Guidelines for optimal placement, considering clearances and steam distribution.

Wall Mounting Procedure

Step-by-step instructions for securely mounting the humidifier on a wall.

Hydraulic Connections

Supply Water Specifications and Connections

Details on water quality limits, treatment recommendations, and connection requirements.

Electrical Connections

Power Supply Cable Connection

Procedure for connecting the main power supply to the humidifier unit.

Steam Production Command Signals

Methods for controlling steam output using external signals (ON/OFF or modulating).

Humidity Probe Control

Connecting and configuring humidity sensors for automated control.

Final Electrical Connection Checks

Verification steps to ensure correct and safe electrical connections.

Commissioning

Autotest Procedure

Explanation of the unit's self-check process performed upon startup.

User Interface and Controls

Description of the front panel display and keypad for operation and programming.

Keypad Functions

Detailed explanation of the functions of each button on the control keypad.

Setting the Set Point (St)

Procedure to adjust the desired humidity or temperature set point for the unit.

Configuration Parameters

Basic Operation Parameters

Core parameters that define the fundamental operation of the humidifier.

Control Parameters

Parameters used for adjusting and managing the unit's control functions.

Alarms

Alarm Codes and Solutions

Lists and explains alarm indications, causes, conditions, and possible solutions.

Autotest Retry Procedure

Details the procedure for handling errors and retrying autotests with fault tolerance.

Troubleshooting Common Issues

A guide to diagnose and resolve common operational problems and their causes.

Maintenance Procedures

General Maintenance Guidelines

Important safety precautions and initial steps before performing maintenance.

Cylinder-Boiler and Heater Maintenance

Detailed steps for cleaning and maintaining the boiler and its heating elements.

Fuse Replacement

Information and table for replacing auxiliary circuit fuses based on model.

Component Replacement Procedures

Steps for replacing NTC sensors, PTC sensors, and drain pumps.

Boiler Heater Electrical Connections

Wiring diagrams for connecting boiler heaters based on model, voltage, and phase.

Wiring Diagrams

UR002-UR004 Single-Phase 208 V Wiring

Detailed electrical schematic for UR002 and UR004 models operating on 208V.

UR002-UR004 Single-Phase 230 V Wiring

Detailed electrical schematic for UR002 and UR004 models operating on 230V.

UR006 Single-Phase 208 V Wiring

Detailed electrical schematic for UR006 models operating on 208V.

UR006 Single-Phase 230 V Wiring

Detailed electrical schematic for UR006 models operating on 230V.

UR006;UR010 (208-230-460-575 V) & UR013 (230-460-575 V) Wiring

Schematics for UR006/UR010 (various voltages) and UR013 (3-phase voltages).

UR006;UR010;UR013 Three-Phase 400 V Wiring

Electrical schematic for UR006, UR010, and UR013 models operating on 400V.

UR020-UR027 Three-Phase (208-230-460-575 V) Wiring

Schematics covering various voltage configurations for UR020 and UR027 models.

UR020-UR027 Three-Phase 400 V Wiring

UR027 Three-Phase 230 V Wiring

UR040-UR053 Three-Phase (460-575 V) Wiring

UR040-UR053 Three-Phase 400 V Wiring

UR053 Three-Phase 460 V Wiring

UR060 Three-Phase 575 V Wiring

UR060 (460-575 V) Wiring Diagram

UR060-UR080 Three-Phase 400 V Wiring

UR080 Three-Phase (460-575 V) Wiring

Carel heaterSteam UR020 Specifications

General IconGeneral
ModelUR020
CategoryHumidifier
Steam output20 kg/h
Power consumption15 kW
Protection ratingIP20
TypeSteam humidifier
Water conductivity range125 to 1250 μS/cm
Steam outlet connection1"
Drain connection1/2" male
Water inlet connection3/4 inch

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