Start-Up; Preliminary Check-Up And Leakage Test - Cuenod C 120 Instrucciones De Montaje

Start-up

Preliminary check-up and leakage test

Setting air pressure switch
Selecting fuel
Burner start up simultaneously involves
starting up installation by the fitter or his
representative; only they can guarantee
boiler house compliance with currently
accepted practices and regulations in
force.
The fitter must first be in possession of
a " certificate of gas fuel conformity "
issued either by the approved body or
distributor and also have leak-tested
and drained pipework upstream from
the ball valve. Also, the fuel oil suction
pipe must be filled completely, drained
and pressurized, if booster is available.
Preliminary check-up
· Check the following :
– nominal available voltage and
electrical frequency and compare
them with values found on
identification plate,
– polarity between phase and
neutral,
– previously tested earth wire
connection,
– lack of potential between neutral
and earth,
– motor rotation directions,
– thermal relay only in manual (H)
position and intensity setting.
· Cut off electrical supply.
· Make sure there is no current.
· Close liquid and gas fuel valves.
· Read boiler and regulator
manufacturer service instructions.
· Check the following :
– boiler is full of pressurized water,
– circulator(s) work(s),
– mixing valve(s) open,
– combustion air supply to the boiler
house and combustion product
exhaust pipe are working correctly
and compatible with burner
capacity and fuels,
– draught operator working correctly
on exhaust pipe,
– protective fuses outside burner are
present, calibrated and set,
– boiler regulator circuit is set.
32
For fuel oil
tank fuel oil level,
–
suction pipe full,
–
suction and return hose position,
–
boost pressure not exceeding 2bars,
–
control and prefilter valves positions.
–
For gas
gas type and distribution pressure
–
are suited to the burner.
Leakage test
Fuel oil
· This is performed during start-up
while burner is working.
Gas
· Connect manometer upstream from
the gas manifold.
· Open and close the ball valve.
· Check supply pressure and its
long-term stability.
· Use a purpose designed foam to
check tightness of gas manifold
connections, including external filter.
No leakage should be detected.
· Drain pipework downstream from the
ball valve whilst taking care to
protect the gas valve intake.
· Reclose drain valve, remove
manometer, close pressure take-off.
05/2006 - Art. Nr. 13 013 500B
Setting air pressure switch
· Check flexible hose connection
(pressure take-off + to pressure
switch +). The other pressure
take-off must remain open.
· Remove transparent cover. Unit
includes a ­ú¯ index and graduated
mobile disk.
· Provisionally set switch to the
minimum value shown on graduated
disk.
Selecting fuel
On delivery, fuel is selected manually
via the S4 switch on TC.
Optionally, fuel changeover can be
remote controlled.
Choice of fuel
When both fuels are available :
Set in the following order :
1. Fuel oil to 90% of the nominal power
of a new boiler, otherwise adjust
percentage suitable to given case.
2. Natural gas or propane gas. Nominal
gas flow is set according to nominal air
flow specified during fuel setting.
This procedure enables to fully use
boiler and burner.