Immergas 3.020857, Инструкция и предупреждение

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3.8 POSSIBLE ADJUSTMENTS.
N.B.: to adjust the gas valve, remove the plastic
cap (6); after adjusting, refit the cap.
• Preliminary calibration operations.
- Set parameter P4 at 0 %.
- Set parameter P5 at 99 %.
• Activate the chimney sweep function.
- Enter the “DHW chimney sweep” mode,
opening a DHW cock.
Important: if the boiler is set-up only for
central heating, calibrate with chimney sweep
in “central heating” mode.
• Adjustment of boiler nominal thermal heat
output.
- Set the maximum output (99%) using the
buttons (5 and 6 Fig. 2-1).
- Adjust the boiler nominal power on the brass
nut (3 Fig. 3.3), keeping to the maximum
pressure values stated in the tables (Par. 3.18)
according to the type of gas; by turning
clockwise the heat potential increases, anti-
clockwise it decreases.
• Adjustment of boiler minimum thermal heat
output.
N.B.: only proceed after having calibrated the
nominal pressure.
- Set the minimum output (0%) always using
the buttons (5 and 6 Fig. 2-1).
- Adjust the minimum thermal input by ope-
rating on the cross plastic screws (2) on the
gas valve maintaining the brass nut blocked
(3);
• Exit the “Chimney sweep” mode and keep the
boiler functioning.
• Adjustment of the boiler minimum heat output
in heating phase.
N.B.: only proceed after having calibrated the
minimum boiler pressure.
- To adjust the minimum heat output during
the heating phase, change parameter (P4),
increasing the value the pressure increases,
reducing it the pressure drops.
- The pressure to which the boiler minimum
heat output must be adjusted, must not be
lower than that stated in the tables (Par. 3.18).
• Adjustment (any) of the boiler maximum heat
output in heating phase.
- To adjust the maximum heat output during
the heating phase, change parameter (5),
increasing the value the pressure increases,
reducing it the pressure drops.
- The pressure to which the boiler maximum
heat output must be adjusted in central
heating phase, must not be carried out in
reference to that stated in the tables (Par.
3.18).
3.9 AUTOMATIC SLOW IGNITION
FUNCTION WITH TIMED RAMP
DELIVERY.
In ignition phase, the P.C.B. supplies constant
gas with pressure proportional to the parameter
“G2” set.
3.10 CHIMNEY SWEEP” FUNCTION.
When activated, this function forces the boiler
to variable output for 15 minutes.
In this state all adjustments are excluded and only
the safety thermostat and the limit thermostat
remain active. To activate the chimney sweep
function, press the Reset button (1) for 8 seconds
in absence of DHW requests, its activation is si-
gnalled by the indication of the flow temperature
and the flashing and symbols.
This function allows the technician to check
the combustion parameters. Once the function
is activated, it is possible to select whether to
perform the check in CH status, regulating the
parameters with buttons (5 and 6) or in DHW
mode opening any DHW cock and always regu-
late the parameters with the buttons (5 and 6).
Functioning in CH or DHW mode is visualised
by the relative flashing
or symbols.
On completion of the checks, deactivate the
function by pressing the Reset button (1) for
8 seconds.
3.11 PUMP ANTI-BLOCK FUNCTION.
The boiler has a function that starts the pump
once every 24 hours for the duration of 30 se-
conds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.12 THREE-WAY ANTI-BLOCK
FUNCTION.
The boiler is supplied with a function that activa-
tes the motorises three-way unit every 24 hours,
carrying out a complete cycle in order to reduce
the risk of three-way block due to prolonged
inactivity.
3.13 RADIATORS ANTI-FREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.14 P.C.B. PERIODICAL SELF-CHECK.
During functioning in central heating mode or
with boiler in stand-by, the function activates
every 18 hours after the last boiler check/power
supply. In case of functioning in domestic hot wa-
ter mode the self-check starts within 10 minutes
after the end of the withdrawing in progress, for
duration of approx. 10 seconds.
N.B.: during self-check, the boiler remains off,
including signalling.
3.15 SOLAR PANELS COUPLING
FUNCTION.
In the case of integration of the heating of the
DHW with solar panel systems, for correct use
of the boiler in this condition, it is necessary to
set the parameter P3 (DHW thermostat) on “1”.