Start-Up; Preliminary Check-Up - Cuenod C 280 B 517/8 Manual De Utilización

Start up
Preliminary check-up and leakage tests
Adjusting air pressure switch
Selecting fuel
Burner start up simultaneously involves
starting up the installation by the fitter
or his representative; only they can
guarantee compliance of the boiler
house with currently accepted practices
and the regulations in force.
The fitter must first be in possession of
a "certificate of gas conformity" (fuel)
issued by either the approved body or
the distributor and also have
leak-tested and drained the pipework
upstream from the quarter-turn
hand-operated valve.
Similarly the fuel oil suction pipe should
be filled completely, drained and
pressurized if there is a booster.

Preliminary check-up

· Check the following:
– rated available voltage and electric
frequency and compare them with
the value showing on the
identification plate,
– polarity between phase and
neutral,
– connection of the previously tested
earth wire,
– lack of potential between neutral
and earth,
– motors direction of rotation,
– thermal relays only in manual (H)
position with intensity adjustment.
· Cut off the power supply
· Make sure power is off
· Close fuel valves
· Read service instructions from boiler
and regulator manufacturers
· Check that :
– boiler is full of pressurized water
– circulator(s) is (are) working
– mixing valve(s) is (are) open
– combustible air supply to the
boiler and combustion products
exhaust pipe are actually
operating and are compatible with
the rated capacity of burner and
fuels
– draught regulator is working
properly on the exhaust pipe
– protective fuses outside burner are
available, calibrated and adjusted
– boiler regulator circuit is adjusted.
For fuel oil :
the level of fuel oil in the tank
–
the filling of the suction pipe
–
the position of the suction and return
–
hoses
the boost pressure not exceeding 3
–
bars
the position of control and pre filter
–
valves
For gas
the gas type and distribution
–
pressure are adapted to the burner.
Leakage test
Fuel oil
· This is performed during start-up,
while burner is working.
Gas
· Connect a manometer upstream
from the gas train
· Open and close the ball valve
· Check supply pressure and its
long-term stability
· Use a specially designed foam
product to check tightness of gas
train connections, including external
filter.
No leakage should be detected
· Drain pipework downstream from the
ball valve
· Close drain valve, remove the
manometer and close the pressure
take-off.
11/2003 - Art. Nr. 13 013 506A
Gas pressure switch setting
· Remove the transparent cover. The
unit includes a x index and a
graduated mobile disk.
· Provisionally set the pressure
controller to the minimum value
shown on the graduated disk.
Selecting fuel
On delivery, fuel is selected manually
by means of the switch S4 fitted on TC.
As an extra option, fuel changeover can
be remote- controlled.
Choice of fuel
When both fuels are available, or failing
that, take into account the following
principle :
Adjust in the following order :
1. The fuel oil at 90% of the rated
power of a new boiler or, failing that,
adjust percentage to the given case.
2. The gaseous fuel, natural gas or
propane gas. The rated gas flow is
governed by the rated air flow
specified during fuel oil adjustment.
This procedure enables the operator to
make full use of the boiler/burner unit.
EN
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