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3.14 Servomotor (SQM48.4....)
Important notes
To
avoid
environmental
following instructions!
ATTENTION
Avoid opening, modifying or forcing the
actuators.
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the SQM4... system
connection area, fully disconnect the burner control device
from the power supply (omnipolar separation).
To avoid the risk of electrocution, protect the connection
terminals in a suitable manner and correctly fix the cover
Check the wiring is in order.
Falls and collisions can negatively affect the safety
functions. In this case, the unit must not be operated, even if
it displays no evident damage.
Assembly notes
•
Check the relevant national safety standards are respected.
•
The connection between the actuator command shaft and the
control element must be rigid, without any mechanical play.
•
To avoid an excessive load on the bearings due to rigid hubs,
the use of compensation clutches without any mechanical
play is recommended (e.g. metal bellows-type clutches).
Installation notes
• Arrange the H.V. ignition cables separately, as far as possible
from the control box and the other cables.
• To avoid the risk of electrocution, make sure that the 230V AC
section of the SQM4... unit is fully separated from the
functional low-voltage section.
• The static torque is reduced when the electrical supply of the
actuator is switched off.
•
During the wiring or configuration operations, the cover can
be removed only for short periods. In similar cases, make
sure that dust or dirt does not penetrate inside the actuator.
•
The actuator comprises a PCB with ESD-sensitive
components.
•
The top side of the board carries a cover which affords
protection against direct contact. This protective cover must
not be removed! The underside side of the board must not be
touched.
During the maintenance or replacement of the
actuators, be careful not to invert the
connectors.
ATTENTION
Technical description of the burner
accidents,
material
damage,
observe
or
the
Technical data
Operating voltage
Safety class
Power absorption
Protection level
Cable connection
Rotation direction
Rated torque (max.)
Static torque (max.)
Running time (min.) for
90°
Weight
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
13
GB
D8271
AC 2 x 12 V via bus cable from the
base
unit
or
via
a
transformer
extra low-voltage with safe isolation
from mains voltage
26...34 VA
to EN 60 529, IP 54, provided
adequate cable entries are used
RAST3.5 connectors
- Anticlockwise (standard)
- Clockwise (inverted rotation)
20 Nm (for air and gas)
20 Nm (for air and gas)
30 s.
approx. 1.6 kg
DIN EN 60 721-3-3
Class 3K3
Class 3M3
-20...+60°C
< 95% RH
Fig. 9
separate
Tab. G
20174375
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