Cleaning The Burner And Primary Heat Exchanger - Vaillant TURBOmax Pro 28/2 E Instructions For Installation And Servicing

SERVICING
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Fig. W.1: Cleaning the burner and primary heat exchanger
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Cleaning the burner and
primary heat exchanger
Turn off the boiler.
Isolate the electrical supply to the
boiler.
Remove the boiler case as
described on page 20.
Turn off the gas service valve.
Turn off the boiler CH service
valves.
Turn off the cold water inlet service
valve.
Release the three clamps (1),
remove the combustion chamber
cover (2) and then remove the flue
gas connector (2a) on the fan.
Remove the retaining spring (3).
Pull the three cables (4) and two
tubes (5) from the fan assembly.
Remove the fan assembly (6).
Remove the four screws (7) and
detach the front cover panel from
the combustion chamber (8).
Check the burner (9) and heat
exchanger fins (10) and remove
any loose deposits with a soft
brush.
Reassemble in reverse order.
Check central heating expansion
vessel.
Note: It is not necessary to carry out
this check every year – a check
every three years should be
sufficient.
Release the system water pressure
from the boiler.
Remove valve cap from expansion
vessel charge point.
Check that the internal charge
pressure of expansion vessel is
between 0.7 - 0.9 bar. If pressure
is lower than this the vessel should
be re-pressurised using an air
pump.
Refit valve cap.
Open central heating service
valves and re-pressurise the boiler
and heating system if necessary.
Open the gas service valve.
Turn on the mains power supply.
Operate the boiler and carry out
soundness, safety and function
checks.
Complete the service interval
record section in the log book and
leave with the user.