Special Conditions Of Safe Use; Special Conditions Of Safe Use For Sensor Enclosure, Body And Probe; Additional Special Conditions Of Safe Use For Sensor Body And Probe; Equipment Marking Information - Pentair Goyen Mecair FFA Installation And Operation Manual

4.2 SPECIAL CONDITIONS OF SAFE USE

4.2.1 Special Conditions of Safe Use for Sensor Enclosure, Body and Probe

a) All connections to the equipment must not be inserted or removed unless the area in which the equipment
is installed is known to be non-hazardous, or the circuit to which it is connected has been de-energized.
This includes the plugging/unplugging of the screw terminals from the PCB-mounted headers.
b) A connection shall be made between the stud on the probe electronics housing and the duct wall. The connection
shall be made as follows:
The cable shall have a cross-sectional area of at least 4 mm².
•
The cable shall be connected using an anti-vibration nut and washer or a similar arrangement of comparable
•
integrity.
If the probe is removed while a potentially flammable dust or gas is present, this connection shall be maintained during
the withdrawal of the probe.
c) The part of the equipment that houses the electronics is suitable for an ambient temperature of –20°C to +50°C
and the standard range of atmospheric pressure; the user/installer shall ensure that the process temperatures
and pressures, including within the dust stack, do not cause these parameters to be exceeded.
d) If the equipment is likely to come into contact with aggressive substances (e.g. Acidic liquids or gases that may
attack metals or solvents that may attack polymeric materials relied upon for sealing), then it is the responsibility
of the user to take suitable precautions that prevent it from being adversely affected, thus ensuring that the type
of protection (Non-sparking device Ex nA for sensor enclosure, body and probe, and additionally Dust exclusion
Ex tc for the sensor body and probe) is not compromised.
e) Cable Glands and Stopping Plugs certified to EN 60079-0 (e.g. Dust-protected, ta/tb/tc; Increased safety, Ex e;
Flameproof, Ex d; Type of protection "n" Ex n) are acceptable, provided they are fitted with the appropriate seal
to the enclosure and maintain a minimum ingress protection of IP64. (This seal may be incorporated within the
gland or plug.)
f) Under certain extreme circumstances, the non-metallic labels and insulating bush may store an ignition-capable
level of electrostatic charge. Therefore, the electronics enclosure shall not be installed in a location where the
external conditions are conducive to the build-up of electrostatic charge on such surfaces. In addition, the
non-metallic parts shall only be cleaned with a damp cloth.
f) The equipment must be powered from a nominal 24 V DC power supply that includes transient protection at no
more than 119 V DC. This requirement will be met if the power supply meets the requirements of the Low Voltage
Directive.

4.2.2 Additional Special Conditions of Safe Use for Sensor Body and Probe

a) The ½" Sensor Body must be mounted in the dust stack so that the PTFE insulator is positioned within the wall of
the dust stack, to protect the insulator from a build-up of electrostatic charge and to protect it from any possible
impact.
b) The ambient temperature range within the dust stack in which the ½" Sensor Body and Probe are mounted must
be no more than –20°C to +240°C.

4.3 EQUIPMENT MARKING INFORMATION

WARNING!
POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTIONS
Refer to the Special Conditions of Safe Use (see section 4.2 above).
08 INSTALLATION AND OPERATION MANUAL – OWNER'S RECORD FFA MANUAL – FILTER FAILURE ALARM