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3.13 Actuator
Warning notes
To avoid injury to persons, damage to prop-
erty or the environment, the following warn-
ing notes should be observed!
WARNING
Do not open, interfere with or modify the ac-
tuators!
All activities (mounting, installation and service work, etc.)
must be performed by qualified staff.
Before making any wiring changes in the connection area of
the actuator, completely isolate the burner control from the
mains supply (all-polar disconnection).
Ensure protection against electric shock hazard by providing
adequate protection for the connection terminals and by
securing the housing cover.
Check to ensure that wiring is in an orderly state.
Fall or shock can adversely affect the safety functions. Such
units must not be put into operation, even if they do not
exhibit any damage.
The housing cover may only be removed for
short periods of time for wiring or when
making
It must be made certain that dust or dirt will
WARNING
not get inside the actuator while such work
is carried out.
Use
The actuator (Fig. 10) is used to drive and position the air
damper and the gas butterfly valve, without mechanical lever-
ages but via the interposition of an elastic coupling.
When used in connection with burner controls or electronic
fuel / air ratio control, the associated controlling elements are
controlled depending on burner output.
Installation notes
• Always run the high-voltage ignition cables separate from the
unit and other cables while observing the greatest possible
distance.
• The holding torque is reduced when the actuator's power sup-
ply is switched off.
When servicing or replacing the actuator, take
care not to invert the connectors.
WARNING
20205796
Technical description of the burner
the
addressing.
16
Technical data
Model
Operating voltage
Safety class
Power consumption
Degree of protection
Electrical connections
Direction of rotation
(when facing the shaft)
Running
time
(min.)
for 90°
Holding torque (max.)
Nominal torque (max.)
Weight
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
Condensation, the formation of ice and the entry
of water are prohibited!
WARNING
GB
D8271
SQM45.295A9
AC 2 x 12 V via bus cable from the
basic unit or via a separate trans-
former
Extra low-voltage with safe isolation
from mains voltage
9...15 VA
To EN 60 529, IP 54, provided ade-
quate cable entries are used
RAST3.5 terminals
- Standard: counterclockwise
- Reverse: clockwise
10 s.
1.5 Nm
3 Nm
approx. 1 kg
DIN EN 60721-3-1
class 1K3
class 1M2
-20...+60 ×C
< 95 % r.h.
Fig. 10
Tab. I
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