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29
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Working Instructions & Maintenance
Directive 94/9 CE (ATEX)
9.4 Temperature
The units must be properly ventilated: check that ventilation temperature does
not exceed 55 °C.
Measure housing temperature after 2 hours from start up and check that
the difference between measured temperature (see sketch) and ambient
temperature does not exceed the max. value of 80 °C.
In such a case, immediately stop the unit and call for Customer Service.
9.5 Safety Instructions
Electric motors and other elements to fit at the input or at the output of
VARVEL-ATEX products, must be ATEX approved according the Directive
94/9/CE.
Expected temperature limits of the products must comply with temperature
classes and max. temperature.
VARVEL gearboxes must be installed and serviced according to installation and servicing standards for classified envi-
ronments against explosion hazard because of gas or dust presence (e.g. EN 60079-14, EN 60079-17, EN 50281-1-2 and
any other acknowledged national standard).
In case of combustible dusts, it is mandatory the regular cleaning to avoid any accumulation of dust layers on product sur-
faces
.
It is imperative to earth the gearbox in case it is not coupled to an electric motor or installed on a metal surface.
If the motor is earthed, electrical continuity is ensured by the adapter between the motor and gearbox that is always of
metallic material (steel, aluminium, cast iron).
It is the final responsibility of the installer to verify the electrical continuity between the engine and gearbox.
9.6 ATEX Marking
VARVEL Series RD, XA, RP, RS, RT, RN, RO-RV conform to design requirements required by
Group II, Category 2 and
to operate in areas with explosion danger of gas
(Zone 1 and Zone 2) and combustive dust
(Zone 21 and Zone 22).
- Dust accumulation: max. thickness on sur-face 5 mm maximum (EN50281-1-2)
- Casing: IP66 (Ingress Protection)
VARVEL-ATEX products are identified by the corresponding technical files, deposited at the Notified Body of Technical
File Deposit, INERIS - France:
- Series RD
“ATEX 13 RD”
- Series XA
“ATEX 13 XA”
- Series RP
“ATEX 13 RP”
- Series RS
“ATEX 13 RS”
- Series RT
“ATEX 13 RT”
- Series RN
“ATEX 13 RN”
- Series RO-RV
“ATEX 13 RO-RV”
and marked
II 2 G D c k T4 / T135°C IP66
T
amb
-20 / +55°C
where
:
II
- Group II (Surface Industries)
c
- Construction Safety
« c »
2
- Category
2
k
- Liquid Dipping « k »
G
- Explosive atmosphere
T4
- Temperature Class
with presence of gas, vapours or clouds
T135°C
- Max. Surface Temperature
Zone1 (2G) and Zone 2 (2G o 3G)
IP66
- Protection Grade (Ingress Protection)
D
- Explosive atmosphere
T
amb
-20/+55°C - Ambient Temperature
with presence of dust
Zone 21 (2D) and Zone 22 (2D o 3D)
ATEX 13 XX
- Technical File Ref. No.
