Bedienungsanleitung MCZ MUSA COMFORT AIRMATIC 14 M2 (Seite 54 von 72) (Englisch)

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33-ALARMS

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 values of the table.

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 to 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:

• For products with a specic pressure outlet in the hopper, access the sampling point and connect the pressure gauge

• For products without a dedicated pressure outlet, disconnect the tube of the pressure switch from the pressure outlet on the hopper,

add a Tee tting on the tube to intercept the circuit connecting the pressure gauge and reconnect the tube to the pressure outlet on

the hopper.

Possible adjustments of combustion and consequently of the negative pressure inside the hopper can be implemented in two ways:

A) Changing 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 aects all power values (1 to 5) proportionally and as a percentage. The percentage variation does not aect

intermediate operating stages such as SWITCH ON, FIRE ON or SWITCH OFF

• As the RPM increases, 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 trips 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 reset

• The negative pressure value at the minimum power must always be higher than 10 Pa while also maintaining a reasonable margin

that can worsen over time due to the gaskets or similar being worn (at least 12/13 Pa)

• The negative pressure at maximum power must always be above 20 so that the pressure switch can reset when the pressure switch

resetting the automated device is activated. The pressure switch resetting 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).

• PLEASE NOTE = The TECHNICAL PARAMETERS menus are password-protected to prevent the user from accessing them

inadvertently and are not visible in the user menus.

Attention! The factory setting on the product is designed to obtain the certied technical data. With a data

discrepancy (such as the pellet recipe), the settings may be modied as explained above.

The adjustments must only be carried out by authorised and qualied personnel under their responsibility and by

checking the conformity of the installation beforehand.

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