Continuous Operation; Automatic Mode - Renfert Silent 2921-0000 Instrucciones Para El Servicio

2.4 Continuous Operation

In the continuous mode, the extractor runs as soon
as the unit is switched on, regardless of any
connected devices or extraction points.
The operating mode selector switch (D) is used to
switch between the "continuous" and "automatic"
operating modes.
The selected operating mode is indicated by the
LEDs (C) and (E).
Automatic mode, LED (C)
Continuous mode, LED (E)
Continuous operating mode selection:
• Switch the Silent on (Figure 2b).
• If the continuous mode was selected when the unit
was last switched off, the dust extractor will already
be in the continuous mode. LED (E) will go on and
the unit will start.
• If the unit was in the automatic mode when it was
last switched off, it will restart in the automatic
mode and LED (C) will go on.
• Press and hold switch (D), until the continuous
mode LED (E) goes on and the extractor starts.
The extractor is started and stopped with the ON (B)
and OFF (A) switches or by switching to the
automatic mode with switch (D).

2.5 Automatic Mode

In the automatic mode, extraction only starts when a
connected device is started or operated.
Selecting the automatic mode:
• The device has been connected to the Silent as
described in Sections 1.2 and 1.4.
• Switch the Silent on (Figure 2b).
• If the unit was in the automatic mode when it was
last switched off, it will restart in the automatic
mode and LED (C) will go on.
• If the continuous mode was selected when the unit
was last switched off, the dust extractor will still be
in the continuous mode. LED (E) will go on and the
unit will start.
• Press and hold switch (D), until the automatic mode
LED (C) goes on. The extractor switches off.
• The extractor starts as soon as you begin operating
the dust-generating device.
• After the dust-generating device is switched off,
the Silent continues to run for approx. 5 sec., then
stops automatically.
2.6 Adjusting the Automatic
Start Feature
In the automatic mode, the Silent is switched on and
off by an automatic start system.
This automatic start feature reacts to the current
consumed by an electric device plugged into the unit
power outlet (Figure 4a).
If the current exceeds the activation threshold set at
the Silent, extraction starts. If the current drops below
this activation threshold, extraction stops.
To change the activation threshold:
1. Press and hold for 3 sec.;
- LED and flash.
- A "0" flashes on the display
2. Switch the connected device to its OFF state:
- For "normal" devices, simply switch them off;
- For devices with a standby mode function,
switch them to the standby mode (e.g., for
handpieces switch on only the controller).
3. Press the key.
- A "1" flashes on the display.
4. Switch the connected device to its ON state:
- For "normal" devices, simply switch them on;
- Operate handpieces at low speed.
5. Press the key
- An audible signal confirms that the adjustment
has been successfully performed.
The Silent returns to the operating mode (continuous
or automatic operation) which was set for the auto-
matic start function prior to the adjustment.
2.7 "Change Filter" - Indicator
If LED (K) goes on, this indicates that the filter should
be changed. An acoustic signal will also sound three
times in this case. This indicator applies to both the
dust bag as well as the fine particle filter.
In this case, replace both filters as described in the
"Cleaning/Maintenance" Section.
If the dust extractor continues to be used
after the "Change Filter" indicator goes on,
it will automatically stop once the airflow
drops below a predefined minimum value.
This prevents the motor from overheating
under extreme extraction loads.
The indicator can be turned off by switching
the Silent OFF and ON, thus restarting ex-
traction.
Operating the unit with a blocked filtration
system can result in hazards and damage to
the extractor. Filters must be replaced if the
extractor stops due to a full filter.
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The "Change Filter" indicator goes on once the air-
flow drops below an adjustable threshold value.
The operator can alter this threshold when, for
example, a dust-generating device whose extraction
fitting has a very small cross-section is connected to
the Silent. In this case, the "Change Filter" indicator
would come on too soon.
Ideally, two individuals are required to perform this
adjustment.
This adjustment may only be made with a new dust
bag and a new fine particle filter installed.
An incorrect threshold value adjustment
may result in a failure of the unit to rec-
ognize a full dust bag which, in turn, can
result in the dust bag rupturing.
Depending on the material in the bag, this
may lead to hazards for the operator. In ad-
dition, the dust extractor may be damaged:
.
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