414 NXAIR / ≤ 40 kA 110-0134.9 / 13
Read and understand these instructions before attempting operating works.
28.1 Heater versions
Optionally, one heater is installed each in the switching-device compartment and/or the connection
compartment. The panel heater is designed as high-load wire resistor in the following versions:
Types
High-load wire resistor [Ω]
Operational voltage [V AC]
Switching-device compartment
and/or connection
compartment
Temperature control in the panel is done via a mechanical temperature controller or via an electronic
temperature and humidity controller.
28.2 Mechanical temperature controllers
Damage due to incorrect application
The temperature controllers require direct connection to the ambient air.
Do not cover the ventilation slots of the temperature controllers.
The mechanical temperature controller can either be designed as a normally closed contact or as a normally
open contact:
Contact opens when temperature rises
Contact closes when temperature rises
Fig. 740: Mechanical temperature controller
Selector for temperature control
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