Applications In Ex Zone 22 (Option); Warnings And Notes - AUMA SQ 05.2 Operation Instructions Manual

SQ 05.2 SQ 14.2/SQR 05.2
Information
1.3.

Applications in Ex zone 22 (option)

1.4.

Warnings and notes

SQR 14.2
Escalators
Continuous duty
Buried service
Continuous submersion (observe enclosure protection)
Potentially explosive areas, with the exception of zone 22
Radiation exposed areas in nuclear power plants
No liability can be assumed for inappropriate or unintended use.
Observance of these operation instructions is considered as part of the device's
designated use.
These operation instructions are only valid for the "clockwise closing" standard
version, i.e. driven shaft turns clockwise to close the valve.
Actuators of the indicated series basically meet the requirements for applications in
dust hazardous locations of ZONE 22 in compliance with the ATEX directive
2014/34/EU.
To comply with all requirements of the ATEX directive, observe the following points:
Actuators are marked with the explosion protection designation II3D... for use
in ZONE 22.
Maximum surface temperature of actuators
- T150 °C for ambient temperatures up to +60 °C or
- T190 °C for ambient temperatures up to +80 °C.
Increased dust deposit on the equipment was not considered for the determin-
ation of the maximum surface temperature.
The following conditions must be fulfilled to respect the maximum permissible
surface temperatures at the actuator:
- Respecting types of duty and technical manufacturer data
- Correct connection of thermal motor protection (thermoswitches or PTC
thermistor)
Ambient temperature
up to +60 °C
up to +80 °C
The connector may only be connected or disconnected when not live.
The cable glands and cable entries used have to meet the requirements of
category II3D and must at least comply with enclosure protection IP67.
The actuators must be connected by means of an external earth connection
(accessory part) to the equipotential earth bonding or integrated into an earthed
piping system.
As a general rule, the requirements of IEC 60079 Parts 14 and 17 must be re-
spected in dust hazardous locations. During commissioning, service, and
maintenance, special care as well as qualified and trained personnel are required
for safe actuator operation.
The following warnings draw special attention to safety-relevant procedures in these
operation instructions, each marked by the appropriate signal word (DANGER,
WARNING, CAUTION, NOTICE).
Indicates an imminently hazardous situation with a high level of risk. Failure
to observe this warning could result in death or serious injury.
Tripping temperature
Thermal motor protection
140 °C
155 °C
Safety instructions
Maximum
surface temperature
T150 °C
T190 °C
5