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3.12 Servomotor (SQM48.4....)
Warnings
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the actu-
WARNING
ators.
All interventions (assembly and installation operations, assist-
ance, 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 termi-
nals 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 ac-
tuator is switched off.
•
The housing cover may only be removed for short periods of
time for wiring or when making the addressing. In similar cases,
make sure that dust or dirt does not penetrate inside the actu-
ator.
•
The actuator comprises a PCB with ESD-sensitive compo-
nents.
•
The top side of the board carries a cover which affords protec-
tion against direct contact. This protective cover must not be re-
moved! The underside side of the board must not be touched.
During the maintenance or replacement of the
actuators, be careful not to invert the connec-
tors.
WARNING
20060897
Technical description of the burner
Technical data
Operating voltage
Safety class
Power absorption
Degree of protection
Cable connection
Rotation direction
Nominal torque (max)
Holding torque (max)
Running time (min.)
for 90°
Weight
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
14
GB
D8271
AC 2 x 12V via bus cable from the
base unit or via a separate transformer
extra low-voltage with safe isolation
from mains voltage
26...34 VA
to EN 60 529, IP 54, provided ade-
quate cable entries are used
RAST3,5 connectors
- Anticlockwise (standard)
- Clockwise (inverted rotation)
20 Nm
20 Nm
30 s.
approx. 1.6kg
DIN EN 60 721-3-3
Class 3K3
Class 3M3
-20...+60°C
< 95% RH
Fig. 8
Tab. F
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