Manuals and User Guides for Keston C C55P. We have 1 Keston C C55P manual available for free PDF download: Installation And Servicing Instructions. Keston C55 Pdf User Manuals. View online or download Keston C55 Installation And Servicing Instructions, User Instructions. WD The Keston C45, C40P, C55 & C55P CONTENTS Section Description 0 HANDLING INSTRUCTIONS List of contents Recommended handling.

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Boiler is alight and running in response to a demand from central heating i. Open the catalog to page 4. Flues for gas appliances of rated input not exceeding 70kW BS Open the kseton to page 2.

Return temperature exceeded flow temperature. Check wires on flow and return thermistors are not crossed B25 Flow temperature climbing too quickly.

Keston C55

Domestic Propane and Butane Burning Installations You will need to call an qualified and experienced national Keston service engineer for further advice. Control box errors — possible faulty control box.


Check other gas appliances in the house are working to confirm a supply is present in the property. Boiler lost flame whilst running. Auto Air Vent 4. Fan failure — boiler cannot detect fan rotation. Check wires on flow and return thermistors are not crossed. Confirm that power supply is reaching the elements. Temporary mode whilst boiler is adjusting internal settings.

After clearing the issue, you will need to reset boiler press reset buttonso that boiler resumes operation. This way it guarantees quality, reliability and safety. Outside temperature — display indicates a small graph on the bottom row.

Check for heat leak from gaskets.

This is a spare sensor connection. Check pump direction on boiler and any external pumps.

Flue temperatures above 80C will cause boiler lockout. Open the catalog to page 5. Open the catalog to page Possible fan disconnected manhal faulty. Possible air lock or circulation blockage B26 Low water pressure B28 No signal from fan.


Keston Qudos 28h boiler has an unique feature of error history.

Keston C55: C55P Manuals

Each Keston Boiler is displaying three types of codes: E30 Difference between flow 5c5 return temperatures too high. External controls not calling for heat. Return thermistor not connected or faulty.

Boiler pump is in Central Heating overrun mode 2 mins. Minimal size for inlet supply pipes is 15mm. B29 Incorrect signal from fan.

Contact a qualified electrician or your electricity provider. Open the catalog to kestob 8. For safety and economy reasons your boiler should be serviced annually.

Top up system pressure if sealed system.

Keston C C55P Manuals

These error codes will display in priority to all other information on the display. Further distance it is pipe size should be greater. Check boiler for leaks.