TEF 9207 Ex
ENCLOSURE HEATER USER MANUAL
Junction box:
Install blind plugs in all non-used hole in junction box.
Breather / drain plug must only be installed in the longest
horizontal side of junction box.
Electrical connection:
For heater w/ junction box the heating cable is already ter-
minated to terminals inside junction box. The power cable
should be connected directly to the terminal blocks inside
junction box.
For electrical protection and special conditions related to the
electrical connection, see Technical specification on page 2.
In order to maintain the mode of protection, the conductors
must be connected with special care. The isolation must
reach up to the terminal and the conductor must not be
damaged. All screws of terminals, also those remaining va-
cant, must be tightened.
Only DC (direct current) of max. 2550 VDC is acceptable
for testing of electrical insulation resistance between lead
wires and braid.
Reliability:
Because of the intrinsic self-regulating properties of the
heater, the heater can be used without a thermostat. This
provides, in a single component, a heater that is not vulner-
able to thermostat failure.
Further, the rugged polymer construction of the heater ele-
ment ensures highly reliable performance in harsh and cor-
rosive environments due to the acid resistance stainless
steel housing.
INSTALLATION INSTRUCTION
Design flexibility:
Due to the relatively low surface temperature and self-regulat-
ing nature of the heater, components and wires may be lo-
cated close to the heater without fear of damage caused by
overheating. The relatively low profile of the heater makes it
ideal for installation into a range of control and monitoring
panels as well as instrumentation and monitoring cabinets
located on-site.
Operation:
The Tranberg 9207 Enclosure Heater contains no moving
parts. It may be left without fear of failure through overheat-
ing. The heater may be installed anywhere in the enclosure,
although, for best result, the heater should be mounted to-
wards the base of the enclosure in a horizontal position.
Self-regulating performance:
The enclosure heater contains an element consisting of a
semi-conductive polymer core extruded between two par-
allel copper conductors. At low temperatures, electrical cur-
rent flows between the conductors thus generating heat. As
the temperature rises the electrical resistance of the core
material increases thus reducing current flow and heat out-
put.
Power consumption in respect to the ambient tem-
perature is shown in product data/catalogue sheet.
Maintenance/Repairs/Modification:
Before disconnecting the heater, make sure that the power
is disconnected.
If the enclosure heater failed and is defect, it should be
replaced by a new heater.
Modification of the enclosure heater or change of design is
not allowed.
Note! Never install the heater with junction box facing
upwards. Please se datasheet for mounting details.
4xM6 mounting holes on the
backside of the heater.
Hold the heater close to the installation
surface, and insert the M6 screws in each
of the 4 mounting holes.
Use a socket wrench to tighten the screws firmly
and securing the heater.
For the “sandwich” model, insert
the M6 screws and a washer in the
mounting brackets as shown. Use
a wrench for tightening the screws
firmly.
Bonding to earth.
