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Wolf CGB-2-24 - User Manual

Wolf CGB-2-24
108 pages
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GB
IE
WOLF GMBH / POSTFACH 1380 / D-84048 MAINBURG / TEL. +49.0.875174-0 / FAX +49.0.875174-1600 / www.WOLF.eu
Art.-Nr.: 3064810_201804 Subjecttotechnicalmodications
Installationinstructionsforcontractors
Wall mounted gas condensing boiler
CGB-2 wall mounted gas condensing boiler
CGB-2K wall mounted gas condensing combi boiler
CGB-2-14
CGB-2(K)-20
CGB-2(K)-24

Table of Contents

Other manuals for Wolf CGB-2-24

Preview: Replacement Instructions
Replacement Instructions20 pages

Questions and Answers

  • D
    David ParkerSep 7, 2025
    Why calibration factory limit not reached on Wolf Boiler?
    • P
      perezkyleSep 7, 2025
      If your Wolf Boiler displays 'Calibration factory limit' and the minimum limit was not reached, it could be due to flue gas recirculation issues. Check the flue path inside and outside the appliance for any leaks or blockages. Additionally, have customer service set the IO default value to the factory setting. Another possible cause is a corroded or bent ionization electrode, so check its condition and clean or replace it if necessary. Lastly, a wiring error on the HCM-2 (low voltage side) could be the culprit, so check the electrical connection of the HCM-2 low voltage side.
  • E
    elizabeth60Aug 22, 2025
    What to do if no flame is established in Wolf CGB-2-24?
    • B
      barbara92Aug 22, 2025
      If the Wolf Boiler displays 'No flame established', it could be due to several reasons. First, ensure the gas supply is properly connected and the gas valve is open. Next, inspect the ionization electrode for its position and condition, adjusting or replacing it if needed. Also, check the position of the ignition electrode and adjust if necessary, along with examining the ignition transformer and wiring. Verify that the HG44 curves are set to the standard value. Finally, check that the gas valve opens; if it doesn't, check the cables and plugs and repeat the test. If the gas valve is faulty, replace it.
  • N
    natalielewisSep 4, 2025
    Why is fan speed low on Wolf CGB-2-24 Boiler?
    • C
      Cathy RussoSep 5, 2025
      If your Wolf Boiler displays 'Fan speed
  • D
    Daniel WeberSep 3, 2025
    What to do if outside sensor is faulty in Wolf CGB-2-24?
    • G
      Gregory SantiagoSep 3, 2025
      If your Wolf Boiler displays 'Outside sensor faulty,' it means that the outside sensor or sensor lead has a short circuit or break. For the eBus outside temperature sensor, refer to its instructions. Similarly, for a wireless outside sensor, consult its specific instructions.
  • R
    Robert Hubbard Jr.Sep 2, 2025
    What to do if return sensor is faulty in Wolf Boiler?
    • R
      Robert GuerraSep 2, 2025
      If your Wolf Boiler displays 'Return sensor faulty', it indicates that the return sensor or sensor lead has a short circuit or break, or the return sensor temperature is above 100 °C. Check the leads and plug-in connections of the return sensor. If they are OK and there is still no function, replace the return sensor.
  • J
    James NavarroAug 31, 2025
    What to do if DHW sensor is faulty in Wolf CGB-2-24?
    • T
      Tammy CarrAug 31, 2025
      If your Wolf Boiler shows 'DHW sensor faulty', it means that the DHW sensor (cylinder sensor) or sensor lead has a short circuit or break, or the DHW-sensor temperature is above 99 °C. Check the leads and plug-in connections of the DHW temperature sensor. If they are OK, replace the sensor.
  • D
    danielleserranoAug 30, 2025
    What to do if flue gas sensor is faulty in Wolf CGB-2-24 Boiler?
    • P
      Paula PowellAug 30, 2025
      If your Wolf Boiler displays 'Flue gas sensor faulty,' it indicates that the flue gas sensor or sensor lead has a short circuit or break. Check the leads and plug-in connections of the flue gas temperature sensor. If the electrical connection is OK but there is no function, replace the sensor.
  • B
    Brandon VaughnAug 29, 2025
    How to fix eHLSC sensor faulty on Wolf Boiler?
    • M
      Matthew DorseyAug 29, 2025
      If your Wolf Boiler indicates 'eHLSC sensor faulty', it means that the temperature sensor eHLSC1, eHLSC2 on the combustion chamber or sensor lead has a short circuit or break. Check the leads and plug-in connections on the eHLSC on the combustion chamber. If the electrical connection is OK but there's no function, replace the eHLSC.
  • T
    Travis KentAug 27, 2025
    What to do if boiler sensor is faulty in Wolf Boiler?
    • B
      Brittany WilkersonAug 27, 2025
      If your Wolf Boiler displays the message 'Boiler sensor faulty' it could be due to excess temperature in the flow (Boiler sensor > 100 °C). First, check if the pump is running. If it is not, check the cables and plugs and if the electrical connection is OK but there is still no function, replace the pump. Another solution is to increase the minimum pump speed. Also, check the leads and plug-in connections of the boiler sensor, and if they are OK but there is still no function, replace the boiler sensor.
  • B
    bill14Aug 26, 2025
    What to do if TL excess temp on Wolf CGB-2-24?
    • D
      Dalton LaneAug 26, 2025
      If your Wolf Boiler shows a 'TL excess temp' error, it means one of the temperature sensors eHLSC1 or eHLSC2 on the combustion chamber has exceeded the high limit safety cut-out limit (108 °C). Check the system pressure and vent the heating circuit. Inspect the cables and plugs of the temperature limiter (eHLSC), and if they are OK but there's no function, replace the eHLSC. Also, check if the pump is running; if not, check its cables and plugs, and if the electrical connection is OK but it's still not working, replace the pump.

Summary

Safety Instructions and Warnings

Gas, Flue Gas, and Electrical Hazards

Emergency steps for gas/flue gas smells and electrical component risks.

Water Pressure and Burn Hazards

Warnings about high water pressure and hot components.

System Working and Inspection Procedures

Safety procedures when working on the system and inspection recommendations.

Technical Specifications

Gas;Air Mixture Control and Calibration

Gas-Adaptive Combustion Control Principle

Calibration Process

Gas Connection and Supply Pressure

Gas Connection Instructions

Instructions for connecting the gas supply line, including safety warnings.

Checking Gas Supply Pressure

Steps for checking the gas supply pressure, including safety warnings.

Electrical Connection

General Electrical Connection Guidance

Internal Control Unit Wiring

Parameter Configuration

HG Control Parameters Overview

Key Parameter Descriptions

Filling and Draining the System

Heating Water Treatment and Filling

Guidelines for heating water treatment and system filling procedures.

Draining the Heating System

Step-by-step instructions for draining the heating system.

Gas Type and Combustion Checks

Determining and Changing Gas Type

Steps to identify, change, and record the correct gas type.

Checking Combustion Parameters

Boiler Conversion and Pump Function

Boiler Conversion Procedures

Troubleshooting and Faults

General Troubleshooting Guidance

Fault and Warning Code Resolution

Wolf CGB-2-24 Specifications

General IconGeneral
TypeCondensing Boiler
Max. Heat Output (80/60 °C)24 kW
Efficiency (80/60 °C)98%
NOx Class5
Vent Diameter80/125 mm
Fuel TypeNatural Gas

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