Start-Up; Preliminary Check-Up - Cuenod C 285 Operating Instructions Manual

Start up
Preliminary check-up and leakage tests
Adjusting air pressure switch
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.

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.
Leakage test
• Connect a manometer on the pressure
nipple 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 when necessary pipework
downstream from the ball valve
• Close drain valve, remove the
manometer and close the pressure
take-off.
05/2008 - Art. Nr. 13 013 503D
Gas pressure switch setting
• Remove the transparent cover.
The unit includes a index and a
graduated mobile disk.
• Provisionally set the pressure switch at
the minimum value shown on the
graduated disk.
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