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20041904
Technical description of the burner
4.13 Servomotor (SQM48.4....)
Warnings
➤ All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
➤ Before modifying the wiring in the SQM4... system connec-
tion area, fully disconnect the burner control device from the
power supply (omnipolar separation).
➤ To avoid the risk of electrocution, protect the connection ter-
minals in a suitable manner and correctly fix the cover.
➤ Check the wiring is in order.
➤ Falls and collisions can negatively affect the safety func-
tions. 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 function-
al low-voltage section.
• The static torque is reduced when the electrical supply of the
actuator is switched off.
• The housing cover may only be removed for short periods of
time for wiring or when making the addressing. In similar cas-
es, make sure that dust or dirt does not penetrate inside the
actuator.
• The actuator comprises a PCB with ESD-sensitive compo-
nents.
• The top side of the board carries a cover which affords pro-
tection against direct contact. This protective cover must not
be removed! The underside side of the board must not be
touched.
Technical data
Tab. K
To avoid accidents, material or environmen-
tal damage, observe the following instruc-
tions!
Avoid opening, modifying or forcing the ac-
tuators.
During the maintenance or replacement of the
actuators, be careful not to invert the connec-
tors.
Operating voltage AC 2 x 12 V via bus cable from the
base unit or via a separate trans-
former
Safety class extra low-voltage with safe isolation
from mains voltage
Power consumption 26...34 VA
Degree of protection to EN 60 529, IP 54, provided ade-
quate cable entries are used
Cable connection RAST3,5 connectors
Rotation direction - Anticlockwise (standard)
- Clockwise (inverted rotation)
Nominal torque (max) 20 Nm
Holding torque (max) 20 Nm
Running time (min.)
for 90°
30 s.
Weight approx. 1.6 kg
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-3
Classe 3K3
Classe 3M3
-20...+60°C
< 95% RH
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