General notes on climate control in control cabinets
1) Installation
A more uniform heat distribution is achieved if the heater is installed within the lower third of the cabinet.
Coolers however, should be installed in the upper area inside the cabinet.
2) Air circulation / convection
The natural convection of heating air should not be disturbed by extreme packing density of installed builtin
devices. Efficiency and heat distribution can be optimized by implementing circulation fans, complete
fan heating systems, or by installing small ventilators.
3) Surface temperatures in case of PTC heating systems
Because of high surface temperatures, no heat-sensitive components should be installed directly above or
next to a PTC heating device.
4) Large control cabinets
For improved heat distribution in large control cabinet, it is always recommended to install several heaters
including separate temperature controllers respectively circulation fans or heat blowers instead of just one.
5) Tropical version
For the implementation of thermostatically controlled heating systems in tropic regions and at high power
ratings, it is necessary to raise the operating temperature of the heating system itself.
Tropical version means: < 35 °C switch-on / 65 °C switch-off!
Please always indicate "T" when ordering tropical versions!
6) Mounting position - maximum efficiency
Please note our specifications for the individual devices!
7) Should separate controllers be installed?
For thermostatically controlled heating systems, it is not necessary to install a separate temperature
controller. Price advantage! The size of the control cabinet, the number of built-in devices and other
foreign influences however could be factors for a decision to install a separate controller in spite of it.
In case of PTC heaters, on principle, a controller should be installed upstream!
8) Fuse protection for heating system
Thermostatic heaters are linear and therefore, can be fused equal to the rated current consumption (I = P/U)!
PTC heaters however must be fused (delayed-action fuse) at 5 times the rated current consumption
(I = P/U x 5) because of their high switch-on currents.
9) Fixing and connection
Heating devices are either snapped-on to a 35 mm DIN-rail or directly screwed on. (Please note
specifications for individual devices).
The electrical connection can be made either via connecting leads or directly, using the
connecting terminal of the device.
10) Control systems
Our partners are renowned manufacturers. Again our tip: Please let us have your inquiry also if you don't
find the controller / sensor / heating device you are looking for on our website!
Customer-specific versions of devices are - if so agreed - of course subject to exclusivity. With you we
would as well come to an exact agreement in such a situation.