Table of Contents
Advertisement
WD52/0/1997
d.
If necessary, either from visual inspection or a high pressure differential between
points B & C in the pre-service checks, clean the heat exchanger using a suitable
stiff plastic bristle brush, vacuum out any large particles and flush the heat
exchanger with fresh water until the water flowing from the condensate drain is
clear. When brushing the heat exchanger take care not to damage the
condensing plug in the lower half of the heat exchanger.
e.
Remove the condensate trap (Section 7.10) and clean by flushing through with
clean running water.
f.
Check the electrode mounted on the burner head. If the point is damaged or
burnt replace it.
Check that the spark gap measures 4 mm.
g.
Replace the burner head, renewing the gasket if necessary, and reconnect the
gas/air supply and the ignition lead. Ensure the flanged gas/air supply joint is air
tight.
h.
Turn on the electrical supply to the boiler and allow the boiler to reach operating
temperature levels.
i.
Visually inspect the burner through the glass spy hole at the burner head (a small
mirror will prove useful).
j.
Recheck the burner pressure by following the procedure detailed in Section 4.7
k.
Remove the combustion test point plug from the flue pipe. This is situated around
150mm (6ins) from the bottom of the flue elbow at its connection to the heat
exchanger.
l.
Using an approved combustion tester sample the flue products via the
combustion test point. CO
should be observed. If such levels are not observed tune the combustion as
described in Chapter 4 - Commissioning. Also check the gas flow as detailed in
Sections 4.8 and 4.9
m.
Replace the combustion test point plug.
n.
Check all joints for soundness up to the gas burner.
Installation & Servicing Instructions
Chapter 6 : Servicing
levels of between 8.2% and 8.9%, for natural gas,
2
The Keston 130 Condensing Boiler
Page : 40
Advertisement
Table of Contents
