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Gabarron CM15 - User Manual

Gabarron CM15
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INSTALLATION INSTRUCTIONS
AND USER GUIDE
DIGITAL MODULATING ELECTRIC BOILERS &
ELECTRIC COMBI BOILERS
CMX15
CM15
FOR CENTRAL HEATING AND
DOMESTIC HOT WATER
Please read these instructions before installing or
using this appliance for the rst time
CMX15
CM15

Questions and Answers

  • K
    kwilliamsSep 23, 2025
    How to fix low temperature in Gabarron CM15 Boiler installation?
    • R
      Richard GarciaSep 23, 2025
      A low temperature in your Gabarron Boiler installation may be due to a low heating setting. Try regulating the heating setting. Also, check the setting of the ambient thermostat and regulate it if it's too low. If these steps don't work, the installation might be badly calculated, consider increasing output.
  • T
    Tiffany DuncanAug 23, 2025
    Why is my Gabarron CM15 heating system discharging water from the 3 bar safety valve?
    • L
      Lisa BeckerAug 25, 2025
      If the heating system water is discharging from the 3 bar safety valve in your Gabarron Boiler, it indicates excessive pressure. Ensure the filling loop is not passing water and remove it. Check that the expansion vessel is charged with air, and verify the system expansion volume.
  • E
    Edward MillerAug 25, 2025
    What to do if Gabarron CM15 displays fault E3?
    • M
      Mary LarsonAug 26, 2025
      If your Gabarron Boiler displays fault E3, it indicates a problem with the heating system water flow switch. This could be due to low heating system pressure. Check for leaks and refill the heating system to 1.5 bar.
  • T
    Timothy GrossAug 27, 2025
    Why is domestic water discharging from the 7 bar valve on my Gabarron CM15 Boiler?
    • B
      barbara31Aug 27, 2025
      If domestic water is discharging from the 7 bar valve in your Gabarron Boiler, it means there's excessive pressure in the domestic water system. Check that the incoming mains pressure is below 5 bar. Consider fitting a pressure reducing valve. Also, verify that the 2L expansion vessel is charged with air.
  • T
    Terrance KingAug 27, 2025
    What to do if the buttons on my Gabarron Boiler do not respond?
    • C
      coreyhardinAug 27, 2025
      If the buttons on your Gabarron Boiler do not respond, the control panel may be blocked. Consult Section 10.2 BLOCKING THE CONTROLS for instructions.
  • S
    Stacey MejiaSep 16, 2025
    What causes Error E3 Lack of heating water flow in Gabarron CM15 Boiler?
    • G
      Gabriel SantosSep 16, 2025
      Error E3, indicating a lack of heating water flow in your Gabarron Boiler, can be caused by a pump blockage. Unblock the pump according to the instructions. Alternatively, check if any valves are shut and open them. Air in the installation can also cause this issue, so purge the system to remove any trapped air.
  • S
    Samantha CampbellSep 13, 2025
    Why Gabarron Boiler will not start?
    • G
      Gregory OdonnellSep 13, 2025
      Your Gabarron Boiler might not start due to several reasons. It could be that no current is entering the boiler, in which case you should check the installation and turn the independent switch on (only for CMX models). Another reason may be overheating of the heating or S.H.W., or the S.H.W. tank might be empty. If the S.H.W. tank is empty, open a hot water tap until the water flows.
  • A
    Anna HooverSep 15, 2025
    What to do if my Gabarron CM15 heating safety valve expels water?
    • K
      Kristen LongSep 15, 2025
      If the heating safety valve of your Gabarron Boiler is expelling water, it could be due to excessive pressure in cold. Adjust the pressure to between 1 and 1.5 bar. Alternatively, the expansion vessel might have broken down, requiring a change. Also, check the filling valve to ensure water isn't entering the heating circuit.
  • A
    Amy CookSep 5, 2025
    Why is my Gabarron CM15 Boiler heating safety valve expelling water?
    • D
      Danielle OrtizSep 6, 2025
      The heating safety valve might be expelling water because of excessive pressure in cold. Adjust the pressure to between 1 and 1.5 bar. It could also be due to an expansion vessel breakdown, in which case you should replace it. Another possible cause is water entering the heating circuit; check the filling valve.
  • M
    Mary AlvarezSep 3, 2025
    What does fault E6 on my Gabarron Boiler mean?
    • S
      Susan WattsSep 3, 2025
      If your Gabarron Boiler displays fault E6, it indicates a problem with the DHW temperature sensor. Check the connections. If necessary, replace the sensor.

Summary

SAFETY

INTRODUCTION

DESIGN & OPERATION

Explains the boiler's heating capabilities and operation.

PRINCIPLE COMPONENTS

Lists the main internal components and their materials.

KEY TO COMPONENTS

Identifies numbered components in a diagram.

SAFETY DEVICES

Details safety features and controls within the boiler.

INSTALLATION

GENERAL REQUIREMENTS

Outlines installation compliance with standards and regulations.

UNPACKING & CONTENTS

Lists items included in the boiler packaging.

HOT WATER SYSTEM Requirements

Details requirements for installing unvented hot water systems.

LOCATION

Specifies suitable siting requirements for the boiler.

DIMENSIONS & CONNECTIONS

Provides dimensional drawings and connection points.

CLEARANCES

Specifies minimum clearances required around the boiler.

MOUNTING BRACKET

Instructions for fitting the wall mounting bracket.

WATER CONNECTIONS

Details how to connect water pipes to the boiler.

DHW DISCHARGE PIPE-WORK

Specifies requirements for discharge pipework from safety valves.

ELECTRICAL CONNECTIONS

General information on electrical connections to the boiler.

ELECTRICAL SUPPLY SIZING

Specifies cable sizes, MCB/RCD ratings for different boiler outputs.

CONNECTION TO BOILER

Details mains connection procedures and bridging for voltage selection.

WIRING EXTERNAL CONTROLS

Explains connecting external controls like thermostats.

COMMISSIONING

LIMITING BOILER MAXIMUM OUTPUT

How to configure the boiler's maximum output using switches.

HEATING SYSTEM INITIAL FILLING

Step-by-step guide for filling the heating system.

PUMP CHECKING & VENTING

Procedures for checking and venting the circulation pump.

HEATING SYSTEM FLUSHING

Guidance on flushing the heating installation before operation.

FILLING DOMESTIC HOT WATER

Instructions for filling the domestic hot water system.

OPERATING THE BOILER

INITIAL SWITCHING ON

Crucial steps before turning the boiler on for the first time.

CONTROL PANEL DESCRIPTION

Explains the functions of buttons and indicators on the control panel.

DOMESTIC HOT WATER OPERATION

How to operate and set the domestic hot water temperature.

CENTRAL HEATING OPERATION

How to operate the central heating function and adjust temperature.

ANTI-FREEZE MODE (Frost Protection)

Explains the frost protection mode and its activation.

HEATING MODULATION FEATURE

Describes the automatic modulation for energy saving.

LOCKING THE CONTROL PANEL

How to lock the control panel to prevent unauthorized adjustments.

PUMP ANTI-SEIZE FUNCTION

Explains the pump's anti-seize function during inactivity.

TROUBLESHOOTING

POSSIBLE FAULTS & SOLUTIONS

Lists common problems, their causes, and solutions.

OVERHEAT LOCK-OUT & RE-SETTING

Details how to reset overheat safety cut-outs.

HEATING SYSTEM FLOW SWITCH - E3 ERROR & SYSTEM BY-PASS REQUIREMENTS

Explains the E3 error and the need for system by-pass.

CHECKING RATED HEAT OUTPUT

Procedure to verify the boiler's configured heat output.

MAIN COMPONENTS

MAINTENANCE & CARE

ENVIRONMENTAL INFORMATION

TECHNICAL DATA

WIRING DIAGRAMS

Gabarron CM15 Specifications

General IconGeneral
BrandGabarron
ModelCM15
CategoryBoiler
LanguageEnglish

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