Table of Contents
Advertisement
WD52/0/1997
To ensure the continued safe and efficient operation of the boiler it is necessary to carry out
routine servicing at regular intervals. The frequency of the servicing will depend upon the particular
operating conditions, but it is recommended that an annual service should be carried out by a
qualified engineer.
The appliance has an integral air filter, mounted at the top right hand side of the boiler, to which
the air intake pipe is connected. This filter should be examined every time the boiler is serviced. It
may need more frequent inspection according to the condition of the atmosphere in which the air
intake terminates.
Note:
The air filter can be easily blocked if the boiler is running on or near a building site having
an excess of airborne dust. It is essential, with a premix gas burner, that the air is clean
and free of dust.
It is the law that any service work must be carried out by competent qualified persons.
6.1
Pre-Service Checks
It is recommended that an inspection should be carried out prior to shutting down the unit
for servicing. Remove the front cover by removing the screws retaining the top of the door
and lifting the cover from the base (Front cover located by two pegs). The following items
should be observed:
a.
Smooth starting and running of the blower.
b.
Smooth lighting of the burner.
c.
Check for leakage of gas, gas/air or combustion products.
d.
Check for condensate leaks.
e.
Check the colour and appearance of the flame. A sky blue flame slightly off the
burner gauze is normal. The burner itself should appear dark. Any glow on the
burner indicates gauze blockage requiring cleaning, an incorrect gas flow or an air
intake blockage.
f.
Check that the temperature differential between the flow and return pipes is less
than 15
g.
Check for water soundness.
h.
Inspect the flue vent and air intake pipework. Joints must be sound and all
pipework well bracketed.
i.
Check that there is a steady fall back to the boiler from the flue pipe to allow
condensate to run back into the boiler (See Section 2.8.3 Slope).
j.
With the boiler operating at a low return temperature (i.e. less than 50
that the condensate flows freely from the condensate line.
6.1.1
Burner & Heat Exchanger Blockage Checks
i)
ii)
iii)
iv)
v)
Installation & Servicing Instructions
Chapter 6 : Servicing
6. ROUTINE (ANNUAL) SERVICING
o
C. The temperature difference should be between 10
Turn off the boiler & shut off the gas supply to the boiler.
Remove the pressure point screws from points A & B. Attach a differential
gauge.
Turn on the boiler and wait for the fan to reach full speed. Obviously the
burner will not light.
The pressure difference should be between 10 mbar and 14 mbar (lowest
value represents a new appliance). If not clean the burner.
Turn off the electrical supply to the boiler.
The Keston 130 Condensing Boiler
o
C and 15
o
C.
o
C) check
Page : 38
Advertisement
Table of Contents
