Keston K50 User manual

KESTON CONDENSING BOILER
Users Instructions
The Gas Safety (Installation And Use) Regulations: 1994 impose certain statutory obligations on
gas users. Further information regarding these regulations can be obtained from your Gas Region.
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 domestic
hot water supply. They are designed for use with fully pumped systems only.
These boilers are supplied for natural gas use but may be converted for use
with LPG by installing the appropriate conversion kit. This conversion must be
carried out by a competent person.
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 : 254 mm, Bottom : 127 mm, Left : 1 mm,
Right : 1 mm & Front : 305 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) Check that the gas tap to the boiler is in the ON position (i.e. the screwdriver
slot is aligned with the gas tap).
3) Switch on the electric supply to the boiler and controls and set the heating
controls to call for heat.
4) 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.
WD 62/1/1997

Warning: If there is no pressure indicated and the system if of the pressurised
type do not attempt to light the boiler. Send for your Installer or Service
Engineer to re-pressurise the system.
To Light The Boiler
Switch the On/Off switch, to the left of the control panel on the front of the boiler, to
the ON position. The following sequence will occur:
1) In the On position the 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) At the same time the red (lockout) light will illuminate. If neither the red
(lockout) lamp nor green (run), the upper lamp adjacent to the flame symbol,
illuminate then the boiler is up to temperature and will automatically start
when the heating temperature drops sufficiently.
3) After about 15 seconds the boiler will ignite and the green (run) lamp, the
upper lamp adjacent to the flame symbol, will also be illuminated.
The boiler is now running correctly and will proceed to switch itself on and off as the
heating reaches its operating temperature.
If the green (run) lamp, the upper lamp adjacent to the flame symbol, goes out and
the red light remains illuminated for more than two minutes, due to a failure to ignite
or an interruption to the gas supply, turn the boiler off, wait for 10 seconds and turn
the boiler on again as described above in To Light The Boiler. If the boiler still fails
to ignite after three successive attempts contact your Installer or Service Engineer.
NB: The Keston boiler is designed for simplicity and hence has no user
adjustment.
Gas Leak or Fault
If you suspect a gas leak turn off the appliance immediately and contact your
local gas region without delay.
If you suspect a fault with the appliance it must not be used until the fault has
been corrected by a competent person.
In the unlikely event of a breakdown consult your Installer or Service Engineer
WD 62/1/1997
Pressure
Gauge
Green
Lamp
Red
Lamp
On/Off
Switch
2
31
0
I
0
Fig 1: Boiler Control Panel