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Calomax eclipse 3W5 - User Manual

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MODELS:
3C5, 3C10 & 3W5
INSTALLATION, OPERATION AND SERVICING INSTRUCTIONS
FOR THE ECLIPSE RANGE OF WATER BOILERS
Please read these
instructions carefully
before operating your
boiler for the fi rst time
Issue 2
026/07/10
DCR :810
Calomax Limited
Lupton Avenue, Leeds LS9 7DD
Tel. 0113 249 6681 Fax. 0113 235 0358
e-mail: service@calomax.co.uk www.calomax.co.uk

Questions and Answers

  • W
    wvelasquezAug 8, 2025
    What to do if my Calomax Boiler is overboiling?
    • R
      Regina HollandAug 8, 2025
      If your Calomax Boiler is overboiling, the issue could stem from several causes. It might be due to excessive internal scale, in which case, de-scale the boiler, especially the thermistor. Another possibility is faulty wiring to the thermistor or a faulty thermistor itself, which would require repair or replacement. The temperature controller might need adjusting to a lower operating temperature. Additionally, a failed element to earth would necessitate element replacement, or a defective Printed Circuit Board would require replacement.
  • T
    Thomas AlvarezAug 18, 2025
    Why is there no boiling water available from my Calomax Boiler?
    • M
      morganraymondAug 18, 2025
      If there's no boiling water available from your Calomax Boiler, several factors could be at play. It might be due to a broken tap top, which would need replacement. Alternatively, the element might have failed or tripped, requiring replacement or reset. A defective Printed Circuit Board could also be the cause, necessitating its replacement.
  • A
    Amanda WalkerAug 28, 2025
    What to do if my Calomax eclipse 3W5 overflows?
    • K
      Kristen Mooney DDSAug 28, 2025
      If your Calomax Boiler is experiencing overflows, it could be due to dirt in the solenoid valve. Try cleaning the solenoid filter or replacing the solenoid, and "work the boiler" following the Service Instructions. Another potential cause is that the level sensors require de-scaling or replacement. Also, a defective Printed Circuit Board may be the reason, and you would need to replace the circuit board.

Summary

Introduction, Checklists, and Approvals

Construction Materials

Installation Location and Cold Water Inlet

Cold Water Inlet Requirements

Details U.K. Water Supply Regulation compliance, pipe flushing, and pressure specifications.

Dimensions and Vent;Overflow

Electrical Connections and User Instructions

Electrical Connection Requirements

Specifies 240v AC 13A supply, RCD recommendation, and connection guidelines.

Troubleshooting and Accessories

Basic Troubleshooting Guide

Lists common symptoms, possible causes, and remedies for boiler issues.

Service Instructions and General Function

Service Indicator Light Meanings

Explains the red service indicator light flashes and their relation to de-scaling needs.

De-scaling Procedure

Details how to access the water tank, remove scale, and chemical de-scaling precautions.

Wiring Diagram and Service History

Wiring Schematic

Provides a wiring diagram for Eclipse 3W5, 3C5, and 3C10 water boilers.

Warranty and Product Specification

Calomax eclipse 3W5 Specifications

General IconGeneral
BrandCalomax
Modeleclipse 3W5
CategoryBoiler
LanguageEnglish

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