Riello 1135T1, Installation, Use And Maintenance Instructions, Page: 19 / 68

17 20173117 GB
Technical description of the burner
4.13 Actuator
Warning notes

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.
Use
The actuator (Fig. 7) is used to drive and position the air damp-
er and the gas butterfly valve, without mechanical leverages
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.
Technical data
Tab. I
WARNING
To avoid injury to persons, damage to prop-
erty or the environment, the following warn-
ing notes should be observed!
Do not open, interfere with or modify the ac-
tuators!
WARNING
The housing cover may only be removed for
short periods of time for wiring or when
making the addressing.
It must be made certain that dust or dirt will
not get inside the actuator while such work
is carried out.
WARNING
When servicing or replacing the actuator, take
care not to invert the connectors.
Model SQM45.295A9
Operating voltage AC 2 x 12 V via bus cable from the
basic unit or via a separate trans-
former
Safety class Extra low-voltage with safe isolation
from mains voltage
Power consumption 9...15 VA
Degree of protection To EN 60 529, IP 54, provided ade-
quate cable entries are used
Electrical connections RAST3.5 terminals
Direction of rotation
(when facing the shaft) - Standard: counterclockwise
- Reverse: clockwise
Running time (min.)
for 90°
10 s.
Holding torque (max.) 1.5 Nm
Nominal torque (max.) 3 Nm
Weight approx. 1 kg
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
class 1K3
class 1M2
-20...+60 ×C
< 95 % r.h.
WARNING
Condensation, formation of ice and the entrance
of water are not permitted!
D8271
Fig. 7