07/2009 - Art. Nr. 13 022 182A
12
Checks before commissioning
The following must be checked before
initial commissioning:
• Correct assembly of the burner in
accordance with the present
instructions.
• Correct pre-adjustment of the burner in
accordance with the values in the
adjustment table.
• Setting combustion components.
• The heat generator must be fitted and
ready for operation, and the operating
regulations for the heat generator
must be observed.
• All electrical connections must be
correct.
• The heat generator and heating
system must be filled with sufficient
water and the circulating pumps must
be in operation.
• The temperature regulator, pressure
regulator, low water detectors and any
other safety or limiting devices that
might be fitted must be connected
correctly and be operational.
• The exhaust gas duct must be
unobstructed and the secondary air
system, if available, must be
operational.
• An adequate supply of fresh air must
be guaranteed.
• The heat request must be available.
• Fuel storage tanks must be full.
• The fuel supply lines must be
assembled correctly, checked for
leaks and bled.
• A standard-compliant measuring point
must be available, the exhaust gas
duct up to the measuring point must
be free of leaks to prevent anomalies
in the measurement results caused by
outside air.
Assembly
Choice of fuel
Checks before start-up
Choice of fuel
The choice of fuel is made manually
using switch
S10
to be fitted on the
burner side.
To do this:
• Unscrew cap
1
.
• Remove the gasket, the tooth
lockwasher and the knurled ring.
• Pass the switch lever through the
support window.
• Refit only cap
1
to secure the switch.
Moving the switch during operation
causes lockout of the control unit. During
operation, the two fuel circuits must be
left open when the burner is operating
with gas. However, when powering up or
during operation, if no fuel oil is
available, it is essential to remove the
pump coupling, which must be stored in
a visible place so it can be repositioned
when liquid fuel is to be used.
Choice of fuel
When both fuels are available, or failing
that, apply the following principle:
Adjust in the following order:
1. Domestic liquid fuel oil to 90% new
boiler rated output, or failing that, adjust
the percentage according to the
circumstances.
2. Gaseous fuel. The nominal gas
throughput is subject to the nominal air
flow defined in the fuel oil setting. This
procedure corresponds to optimum use
of the boiler/burner unit.
Summary of Contents for NC12 B117
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