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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.
• Adjustment of boiler nominal thermal heat
output.
- Set the maximum output (99%) using the
buttons (5 and 6 Fig. 2-1).
- From the brass nut (3 Fig. 3-3) adjust
the boiler nominal output, observing the
maximum pressure values stated in the table
(Par. 3.18 / 3.21) 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%) using the
buttons (5 and 6 Fig. 2-1).
- Adjust the minimum thermal input by
operating 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
/ 3.21).
• Adjustment (any) of the boiler maximum heat
output in heating phase.
- To adjust the maximum heat output during
the heating phase, change parameter (P5),
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
/ 3.21).
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 signalled 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
regulate the parameters with the buttons (5
and 6).
Functioning in CH or DHW mode is visualised
by the relative flashing symbols
or
.
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
seconds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.12 THREE-WAY ANTI-BLOCK SYSTEM.
The boiler is supplied with a function that
activates the motorised 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 heating mode or with
boiler in standby, the function activates every 18
hours after the last boiler check/power supply. In
case of functioning in domestic hot water 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.
The boiler is set-up to receive pre-heated water
from a system of solar panels up to a maximum
temperature of 65°C. In all cases, it is always
necessary to install a mixing vale on the hydraulic
circuit upstream from the boiler on the cold
water inlet.
Note:
for good functioning of the boiler; the
temperature selected on the solar valve must
be 5°C greater with respect to the temperature
selected on the boiler control panel.
For correct use of the boiler in this condition,
parameter P3 (DHW thermostat) must be set at
“1” and the parameter P9 (DHW ignition delay)
at a temperature sufficient to receive water from
a storage tank situated upstream from the boiler.
The greater the distance from the storage tank,
the longer the stand-by time to be set. When
these regulations have been performed, when
the boiler inlet water is at the same or greater
temperature with respect to that set by the DHW
selector switch, the boiler does not switch on.
Summary of Contents for MINI EOLO 24 3E
Page 1: ...MINI EOLO 24 3E Instruction and warning book 1 038773ENG ...
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Page 28: ...28 3 5 4 4 5 6 6 d d c INSTALLER USER MAINTENANCE TECHNICIAN ...
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