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Before commissioning, the installer must:
- check that the boiler is suitable for the gas used,
- perform a leak check on the gas system,
- carefully bleed the air from the gas line. If the sys-
tem is new, bleeding chases the air out of the
lines so that the boiler has a suitable fuel. Air in
the gas prevents ignition of the burner and with
trip of the safety device by the flame monitor unit.
This remark applies to a new system using natu-
ral gas and LPG. In the second case, the storage
tank should also be efficiently bled before com-
missioning.
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The gas bleed also removes oxide particles resul-
ting from brazing from the piping,
- check the flue gas outlet for leaks and free passa-
ge of the combustion products,
- check that the system is filled with water, P =
1.5 bar, radiators bled, valves open.
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- check that the electrical connection is correct:
230 V (+ 10 %, - 15 %), 50 Hz, polarities correct,
- check that the condensate drain is connected,
- check that the trap is filled with water.
When commissioning, the installer must check:
- correct operation of the controller,
- correct operation of the flame monitor,
- setting of the burner for CO, CO
2
emissions.
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- Open the hand-operated valve on the gas supply.
- Switch on the main heating switch.
The regulator undergoes a self-test sequence,
displaying codes L, P, C, 6, and 5 in turn. The dis-
play then shows 9, and finally 0.
After a wait lasting a few seconds and if there is a
demand for heating, the boiler then starts an igni-
tion cycle. This demand depends on the boiler
settings (refer to operating details for the different
versions § 2 - Chapter III - OPERATION).
If the boiler is currently in an alarm state, press
the manual reset button (if this alarm persists, re-
fer to the list of fault codes).
- Burner adjustment:
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the following
checks should be carried out when commissio-
ning (the burner should be on; see burner port
description and comments, fig. 12 § 5 - Chapter
III - OPERATION).
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Check the combustion para-
meters (§ 2 - 3 - Chapter V - COMMISSIONING)
and proceed to the adjustment of the gas valve
according to the process § 5 - Chapter V - COM-
MISSIONING.
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3L
= Natural gas: H (G20) - 20 mbar, mains pressu-
re, Propane (G31) 37 mbar.
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Select the regulator off position (“7” flashing - § 3.8.3
- Chapter III - OPERATION), then check the fol-
lowing combustion parameters at maximum and mi-
nimum power.
Potentiometer at left hand stop point = P min., at ri-
ght hand stop point = P max.
Adjust the gas flow using an analyser to obtain the
CO
2
/CO rates shown in the table.
!
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