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96389-08.2019-DGbFEIRu
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Accessories
8.2 Oil sump heater
(
retrofit kit item no. 81401)
The explosion-protected heating element is supplied as PTC heating element in a flameproof enclosure
(Ex d) and is supplied with an electrical supply line of approx. 3.2 metres.
Electrical wiring within the potentially explosive area could be though the terminal box compressor.
The connection line for the heating element must be laid permanently and mechanically protected.
During assembly and installation, the requirements of EN 60079-14 and EN 60079-17 must be
observed. In addition, nationally applicable laws, safety regulations (BetrSichV) or provisions must
be observed.
Additional installation instructions as well as the assembly/disassembly manual can be referred to in
the enclosed documentation of the kit.
Conductor cross-section of the supply line: 3 x 1.5 mm
2
Outside diameter of the supply line: 8.1 mm
Operation
: The oil sump heater operates when the compressor is at a standstill. When the compressor
starts up, the oil sump heater switches off again.
ATTENTION To limit the heat resulting from abnormal earth-connection and
earth-conducting current, the following protective equipment must
be installed in addition to excess-current protection:
• In a TT- or TN system, a residual current protection device
(RCD) must be used with a rated triggering current not exceeding
100 mA
. Residual current protective equipment with a rated
triggering current of 30 mA is preferable. The maximum switchoff
time of the equipment for must not exceed 5 seconds for rated
triggering current and 0.15 seconds in case of five-times the rated
triggering current.
• In an IT system, an insulation monitoring device must be used to
check whether the feed is switched off as soon as the insulation
resistance drops to 50
Ω
per volt of rated voltage.
ATTENTION The supply line length of 3.2 m must not be shortened under any
circumstances during installation (integrity of protection against
arcing or flame penetration within the cable insulation).