11
Installation - for contractors
2.3 General safety instructions
!
WarnInG Injury
the appliance may be used by children aged 8 and
up and persons with reduced physical, sensory or
mental capabilities or a lack of experience provided
that they are supervised or they have been instruct-
ed on how to use the appliance safely and have un-
derstood the resulting risks. children must never
play with the appliance. children must never clean
the appliance or perform user maintenance unless
they are supervised.
Only a qualified contractor should carry out installation,
commissioning, maintenance and repair of the appliance.
We guarantee trouble-free function and operational re-
liability only if the original accessories and spare parts
intended for the appliance are used.
3. appliance description
The self-limiting SLH ribbon heater is an energy efficient
way of keeping pipework free from frost, particularly out-
doors. It consists of 2 supply conductors routed in parallel,
that are separated from each other by a special semicon-
ductor matrix.
At low temperatures the electrical resistance of the rib-
bon heater drops, causing the output to increase. At high
temperatures the resistance rises and the output drops.
The ribbon heater can be trimmed individually. The end
of the ribbon heater can be appropriately resealed with
the terminators provided.
note
the use of higher ranking control units is advisable
as these can save energy, keep process tempera-
tures constant and protect the ribbon heaters.
»
If in doubt, consult our service department.
4. Installation
4.1 Protective measures
WarnInG electrocution
We strongly recommend the use of an rcD (30 ma).
» If you are using the ribbon heater on metal, make
sure you protect the ribbon heater against indi-
rect contact to DIN VDE 100, part 410 prior to
commissioning.
» Protect the ribbon heater against mechanical and
chemical damage.
4.2 Preparations
»
Before fitting the cable, ensure that the area around
the pipe is freely accessible.
»
If you want to fit the ribbon heater to a plastic pipe,
first wrap the plastic pipe in aluminium foil to ensure
optimal heat distribution.
4.3 Installing the heating circuit
!
Material damage
Keep the ribbon heater away from any sharp edges
or easily flammable materials to prevent damage to
the ribbon heater and surrounding areas.
note
there is no danger of overheating if ribbon heaters
overlap or touch.
» Remove sharp burrs or any other roughness from the
surface you will be heating.
» Clean and degrease the surface you will be heating.
Power supply
WarnInG electrocution
carry out all electrical connection and installation
work in accordance with relevant regulations.
!
Material damage
observe the type plate.
The specified voltage must
match the mains voltage.
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84
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» To prevent condensate from the pipe entering the
standard socket, form a "drip loop" with the power
cable.
Positioning the thermostat
The thermostat measures the temperature of the pipe and
switches the ribbon heater on and off as required.
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85
2
»
Secure the thermostat with a close fit against the
pipe at the coldest end of the pipe.
Use suitable fix
-
ing materials for this purpose, such as fabric tape,
aluminium adhesive tape or temperature-resistant
cable ties.
