Keston K260, K340 Installation Manual

KESTON CONDENSING BOILER

Users Instructions

The Gas Safety (Installation And Use) Regulations: 1996 (as amended) impose certain statutory

obligations on gas users. Further information regarding these regulations can be obtained from your Gas
Supplier.
All gas appliances must be installed by competent persons by law in accordance with these
regulations. Membership of CORGI is indication of such a competent person with regard to gas
installation.
It is in your interests, and that of safety, to ensure that the appliance is installed correctly and that the

law is complied with. Failure to do so could lead to prosecution.

Introduction

These instructions should be carefully read to ensure safe and economical use
of your boiler.
The Keston Condensing Boiler series are high efficiency central heating
condensing boilers designed to provide central heating and indirect sanitary hot
water supply. They are designed for use with fully pumped systems only. These
boilers are supplied for natural gas use only.

Servicing

To ensure continual safe and efficient operation of the boiler it is recommended
that the appliance be checked and serviced as necessary at regular intervals.
Generally once per year will be sufficient. It is the law that any servicing must be
carried out by a competent person.

Clearances

If fixtures are to positioned close to the boiler the following minimum clearances
must be observed: Top : 127 mm, Bottom : 127 mm, Left : 1 mm, Right : 1 mm &
Front : 540 mm. Extended clearance is required to the front to allow for access
for servicing.

Cleaning

Normal casing cleaning only requires dusting with a dry cloth. To remove more
stubborn marks wipe with a damp cloth and finish with a dry cloth.

Boiler Setup

1) Check that the gas supply from the gas meter is turned ON

2) Switch on the electric supply to the boiler and controls and set the heating
controls to call for heat.

3) Check the pressure gauge, to the right on the control panel on the front of the
boiler. This should show around 1 to 2 bar pressure for pressurised systems.

Warning: If there is no pressure indicated and the system is not of the open vented

type do not attempt to light the boiler. Send for your Installer or Service
Engineer to re-pressurise the system.

To Light The Boiler

Main

On/Off
Switch

0

I

Module
On/Off
Switches

GREEN

LAMP

GREEN

LAMP

Module
Indicator

RED

LAMP

RED

LAMP

2

Lamps

Pressure

31

0

Gauge

Fig 1: Boiler Control Panel

Switch the main On/Off switch, to the top of the control panel on the front of the boiler, to
the ON position. Turn both module On/Off switches, below the main On/Off switch, to the
ON position. The following sequence will occur:

1) In the On position the Main On/Off switch will be lit with an amber light If the

switch does not illuminate check that the electricity supply to the heating
system is on and that the controls are calling for the boiler to fire.

2) The boiler will automatically select one of the two modules to fire and the fan in
one module will start.

3) After about 15 seconds the module will ignite and the green (run) lamp, the upper
lamp adjacent to the flame symbol, will also illuminate.

4) If the boiler detects a second module is required it will initiate firing of the other
module automatically following the same sequence as above.