81
EN
7 COMMISSIONING
m
CAUTION
The commissioning and initial start-up operations
must be carried out ONLY by professionally qualified
personnel who must follow the indications provided
in the INSTALLATION AND MAINTENANCE INSTRUC-
TIONS.
7.1
Preliminary operations
Before commissioning the appliance, check that:
– the fuel, thermal system and water circuit valves are open
– there is sufficient fuel in the tank
– the system pressure as shown on the pressure gauge when
the system is cold , is between
1 and 1.2 bar
– the hydraulic circuit is deaerated
– the expansion vessel pre-charge is
1.0 bar
– the electrical connections have been made correctly
– the discharge pipes for the combustion by-products have
been made correctly
– the vents are adequately sized in relation to the installed pow-
er and the combustion air inlet of the burner is free (without
splits)
– start the fan only in pre-ventilation mode to fill the diesel line.
Open the purge screw of the diesel filter and deaerate (purge)
the line.
NOTE:
The negative pressure of the line MUST NOT fall below 0.4
bar.
7.2
Before commissioning
After completing the preliminary operations, start up the ther-
mal unit:
– set the room thermostat to the required temperature, or if the
system is equipped with a time programmer, check that this
is ON and set accordingly (~20° C)
– set the main system switch to "ON"
ON
Fig. 44
– adjust the heating thermostat (1) to roughly 3/4 of the adjust-
ment range (circa 75°C)
– shift the appliance’s main switch (2) to "1" (on) and check that
the green signalling LED (3), situated on the control panel, is
lit.
1
0
1
2
3
Fig. 45
The thermal unit will perform the start-up phase and remain
in function until the selected temperatures have been reached.
If any faults occur during the start-up or operation, the thermal
unit will perform a “LOCK-OUT” and the lock-out signals (4) of
the control panel and of the lock-out button (PSB) of the burner
device will both light up red.
4
PSB
Fig. 46
m
CAUTION
– After a "LOCK-OUT", wait roughly 30 seconds before
restoring the start-up conditions (RESET).
– To reset the start-up conditions, press the burner
unlock button. Wait for the entire start-up phase to
terminate until the flame appears.
– Before starting up in pre-ventilation mode, the
burner will pre-heat the fuel for roughly 2 and a half
minutes.
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