Danfoss DEVIpipeguard EX Operating guide
Self-limiting heating cables - DEVIpipeguard EX
Installation Guide Self-limiting heating cables - DEVIpipeguard Ex
Installation Guide
Self-limiting heating cables
- DEVIpipeguard EX
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DEVI VIIWB302
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Installation Guide Self-limiting heating cables - DEVIpipeguard Ex
Table of Contents
1 Receipt of Goods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Length of Heating Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4 Protective Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Test and Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7 Operation and Maintenance:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 Receipt of Goods
After receipt of the goods check the cables and
the accessories and compare with the data on the
delivery note to ensure that the correct material
was supplied.
Attention: Ensure that the data sheet has been
supplied. The data sheet is necessary for a correct
2 Storage
The goods have to be stored in a dry place at an
ambient temperature of –20 … +60°C. If a dry
storage is impossible, the heating cable has to be
3 Length of Heating Circuit
The max. allowable length of a heating circuit
(according to the corresponding data sheet) for
unilateral feed depends on the admissible voltage
drop (we recommend not to exceed a voltage
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DEVI VIIWB302
installation. The installation is not to be done
without presence of the data sheet.
Hazardous Area applications: Ensure that the
corresponding approval certicates are supplied.
The number of the certicate must be according
to the number printed on the heating cable.
closed with an end termination set. This is also
necessary if a heating circuit cannot be nished at
the end of a shift.
drop of 10%) and the utilization of the circuit
Breaker (recommended: 16 A CB with “C” characterization, utilization 80%)
Installation Guide Self-limiting heating cables - DEVIpipeguard Ex
4 Protective Measures
• We highly recommend using a ground fault
protection device (30mA).
• For use of the cable as trace heater according
to IEC EN 62395-1 and IEC EN 60519-10 as
well as for use in Hazardous Areas, a leakage
current protection device (30mA) is mandatory!
• When using the heating cables on metal surfaces, they also have to be protected against
indirect contact acc. to DIN VDE 100, part 410
(or equivalent standards) before operation of
the system.
5 Installation Instructions
• Remove any sharp objects on the surface to
be heated
• Clean and degrease the surface
• The installation of a heating circuit has to be
carried out using original accessories acc. to
the installation instructions.
Attention: Do not use adhesive tape with emollients (i.e. PVC)!
Attention: Install according to the min. bending
radius and installation temperature stated on the
data sheet.
An overlapping or contacting installation of the
heating cable does not cause overheating due to
the self-regulating heating characteristic
• The heating cable is to be fully covered (the
entire length) with aluminium foil in order to
prevent insulation material slipping between
the cable and surface to be heated. If the insulation is covered with a metal cladding, an
insulation entry kit has to be used to avoid
mechanical damage of the heating cable.
• The connection and end termination of a
heating circuit has to be carried out using
• When using the heating cable with metallic
braid (protection braiding), this has to be
connected to the potential earth. When using the cable without metallic braid (protection braiding), the heating system must be
protected with a metallic outer sheath. This
metallic sheath (pipeline or cladding of the
thermal insulation resp.) has to be connected
to the potential earth.
• For outdoor use of the heating cables
without outer protective sheath, measurements have to be taken on site to protect the
metallic sheath (protection braiding) against
mechanical or chemical damage.
original DEVI accessories acc. to the DEVI
termination instructions. Deviations will void
the guarantee.
Attention: To avoid short circuit, do not connect the two bus wires of the heating cable to
each other. Under all circumstances observe the
termination and maintenance instructions for the
connection and termination of the heating cables.
Hazardous Area applications: Only termination
material approved by a notied body may be
used with the corresponding heating cable. The
required air gap and creeping distances are to be
followed according to the corresponding termination instructions.
Hazardous Area applications: The free cable end
is to be connected either outside the Hazardous
Area or to a connection box which is approved
according to a standardized type of protection.
• To save energy and to keep process temperatures constant, the application of superior
control units are recommended. Please ask
our project engineers when in doubt.
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Installation Guide Self-limiting heating cables - DEVIpipeguard Ex
Special conditions for safe use:
The connection method, the temperature class,
and the requirements made on the qualication
of the sta putting the regulations into practice,
have to be dened in the certication of nal
installation system.
The manufacturer’s instructions must be followed.
Hazardous Area applications:
An approved safety temperature limiter is to
be used to limit the sheath temperature of the
heating cable to comply with maximum surface
6 Test and Commissioning
After the completion of a heating circuit and prior
to the installation of the thermal insulation, the
following steps have to be taken:
• A visual check of the heating cable regarding
possible mechanical damages and/or incorrect installation.
• Insulation resistance test
• The insulation resistance of each heating circuit is to be measured between each single
bus wire and the metal sheath (protection
braiding). The measurement values are to be
noted. Test voltage: min 500 VDC, preferably
2500 VDC.
• Independent of the heating circuit length,
the insulation resistance must not be lower
than 20 MOhm. In case of a lower insulation
resistance, the source of defect has to be
determined and eliminated.
temperature as indicated in certicate EPS 14
ATEX 1743 U (80°C (T6)).
Attention: Make sure that the heating cables are
never used at or exposed to temperatures above
the nominal exposure temperature ratings.
Attention: When using the self-limiting heating
cables in the industrial range not only the requirements of the standard DIN VDE 0100 but also DIN
VDE 0721 part 1 and DIN VDE 0721 part 2A3 (or
equivalent standards) have to be met.
• Check of the function of the heat circuit (only
in connection with the required temperature
controller and/or limiter).
• Eventual damages must be repaired/
replaced immediately. With short heating
circuits, the heating cable may be replaced
completely. With longer heating circuits,
the defect is to be eliminated by cutting
out the damaged part and replacing it by a
new piece of heating cable according to the
termination instructions.
• Repeat the tests after applying the thermal
insulation.
Identication: Electrically heated parts have
to be identied in reasonable distances with
warning labels “Electrical Heating” on the thermal
insulation (approx. 5 m distance between each
label on pipelines or at least 1 warning label per
pipe-branch respectively.
7 Operation and Maintenance:
The local laws and regulations for the use of
electrical heating cables are to be followed. The
permissible operating specications stated in
the data sheets (i.e. voltage, amperage, exposure
temp., operating temp., IP protection classication) are to be followed accordingly.
• Self-limiting heating cables are generally
maintenance free, although it is recommended that the heating cables be checked
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by qualied personnel in regular intervals for
damages and insulation resistance.
• The heating cable has to be protected
against damages that may occur during
repair work on heated components.
• Hazardous Area applications: The opening
of controllers, junction boxes and terminations are permitted only when the heating
system is not under current.
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