Riello RLS Series, Инструкции по установке, использованию и обслуживанию

Страница: 13 / 40

Technical description of the burner
11 20020804
3.7 Actuators
Warning notes
To avoid injury to persons, damage to property
or the environment, the following warning notes
should be observed!
Do not open, interfere with or modify the actua-
tors!
 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
the addressing.
It must be made certain that dust or dirt will not
get inside the actuator while such work is carried
out.
Use
The actuators (Fig. 7) are used to drive and position the air
damper and the gas butterfly valve, without mechanical leverag-
es 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 con-
trolled 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 dis-
tance.
• To ensure protection against electric shock hazard, make cer-
tain that the AC 230 V section of the actuator is strictly segregat-
ed from the functional low-voltage section.
• The holding torque is reduced when the actuator’s power supply
is switched off.
When servicing or replacing the actuators, take
care not to invert the connectors.
Technical data
Tab. 3
WARNING
WARNING
WARNING
Model SQM50.481R1Z4R
Operating voltage AC 120V
Power consumption 20 VA
Degree of protection To EN 60 529, IP 54, provided ade-
quate cable entries are used
On time 50 %, max. 3 min. continuously
Direction of rotation
(when facing the shaft) - Standard: counterclockwise
- Reverse: clockwise
Running time (min.)
for 90°
25 s.
Holding torque (max.) 15 Nm
Weight approx. 3.3 kg
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity DIN EN 60721-3-3
class 3K3
class 3M3
-20...+60 °C
< 95 % r.h.
Fig. 7
D10074