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Panel heater
24 Panel heater
24.1 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
Mounting location
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.
24.2 Mechanical temperature controller
The mechanical temperature controller can either be designed as a normally closed contact or as a normally
open contact.
Normally closed contact
Normally open contact
237
HINT
Read and understand these instructions before attempting operating works.
High-load wire resistor [Ω]
125 (±10 %)
500 (±10 %)
NOTICE
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.
Contact opens when temperature rises
Contact closes when temperature rises
1
Fig. 394: Mechanical temperature controller
Selector for temperature
(1)
control
NXAIR M
Operational voltage [V AC]
110
230 to 240
139-2021.9 / 07
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