Calomax eclipse 3C5 User Manual

Calomax eclipse 3C5

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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:

C
cpetersonAug 2, 2025
What to do if my Calomax eclipse 3C5 is overboiling?
- T
  Terry Hampton MDAug 2, 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.
M
Morgan ElliottAug 12, 2025
Why is there no boiling water available from my Calomax eclipse 3C5 Boiler?
- W
  whicksAug 12, 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.

Calomax eclipse 3C5 Specifications

General

Brand	Calomax
Model	eclipse 3C5
Category	Boiler
Language	English

Summary

Construction

Installation and Maintenance

Location

Site requirements for boiler installation, including safety considerations.

Cold Water Inlet

Requirements for connecting the boiler to the potable water supply.

Vent & Overflow

Electrical Connections

User Instructions

Commissioning

General Operation

Cleaning

Basic Trouble Shooting

Service Instructions

De-scale

Procedure for removing scale deposits from internal components.

General Function

Printed Circuit Board Replacement (PCB)

Warranty Guarantee

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