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13-SAFETY DEVICES
Remembering that the draught recommended for the products to work properly is 10 Pa at maximum capacity and 5 Pa at minimum
(according to the technical data sheet found in the user and maintenance manual), adjustments may be required in worse draught
conditions (also due to the position of the ue in areas that are particularly subject to adverse weather such as prevailing winds, snow,
northern exposure, etc.) so as to always guarantee the required negative pressure inside the hopper.
To compensate for the lack of internal negative pressure simply adjust the speed (RPM) of the smoke extractor so as to guarantee the
minimum tabular values.
If the negative internal pressure values are noted to be lower than those indicated, this can also be due to the internal gaskets not being
sealed properly or by the product being worn over time.
OPERATING INSTRUCTIONS ON NEGATIVE PRESSURE INSPECTIONS AND POSSIBLE VARIATIONS OF THE RPM
Connect a pressure gauge to the pressure outlet on the hopper:
• In the case of products with a specic pressure outlet in the hopper, access the sampling point and connect the pressure gauge
• In the case of products without a dedicated pressure outlet, disconnect the tube of the pressure switch from the pressure outlet on
the hopper, add a “T” on the tube to intercept the circuit, connecting the gauge and reconnect the tube to the pressure outlet on the
hopper.
Possible adjustments of the combustion and consequently of the negative pressure inside the hopper can be implemented in two ways:
A) Change the RPM value of the smoke extractor in the SETTINGS MENU
• The available values are from -3 to +3 which, as a percentage, correspond to:
• RPM: -10% +10% in Active System products
• RPM: -30% +50% in NON Active System products
• The percentage variation aects all the power values (1 to 5) proportionally and as a percentage. The percentage variation does not
aect intermediate operating stages such as SWITCH ON, FIRE ON or SWITCH OFF
• As the RPM increase, suction also increases and consequently the internal negative pressure, thereby compensating the phenomena
that trigger the alarm.
B) Adjusting the RPM of the gear motor manually in the TECHNICAL PARAMETERS MENU
• The pressure switch has a calibration of 10/20 Pa which means that it disarms when the negative pressure inside the hopper drops
below 10 Pa and requires more than 20 Pa negative pressure inside the hopper for it to rearm
• The negative pressure value at the minimum power must always be higher than 10 Pa while also maintaining a reasonable margin
that can be used over time due to the gaskets being worn or something similar (at least 12/13 Pa)
• The negative pressure at maximum power must always be above 20 so that the pressure switch can rearm when the pressure
switch rearming automated device is activated. The pressure switch rearming procedure (such as after opening the cover to top-up
the hopper), requires the electronics to push the RPM of the smoke extraction fan up to POWER 5 (P5) for a few moments. At P5,
therefore, the negative pressure inside the hopper must always be > 20 Pa (recommended 22/23 Pa to preserve the margin).
• N.B. = The TECHNICAL PARAMETERS menus are password-protected to prevent the user from accessing them
inadvertently
Attention! The factory setting on the product is designed to obtain the certied technical data. In the event of data
discrepancy (as for the pellet recipe), the settings may be modied as set out above.
The adjustments must only be carried out by authorised and qualied personnel under their responsibility and by
checking the conformity of the installation beforehand.
