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Operating Instructions BA 373-E66
Technical specifications subject to change
W. Bälz & Sohn GmbH & Co. Koepffstrasse 5 74076 Heilbronn Germany
Phone +49 (0)7131 15 00 0 Fax +49 (0)7131 15 00 21 www.baelz.de mail@baelz.de
Observe copyright protection DIN 34
9. HEATER
We recommend to install a heating resistor to prevent condensation underneath the cover in the event of
● considerable uctuations in ambient temperature
● high humidity
● outdoor installation
The heating resistor is controlled by a thermostatic switch "TW" (bimetallic contact). The heating is deactivated at a
temperature of approx. +60 °C and is reactivated at a temperature of approx. +40 °C. A continuous operating volt-
age is required for operation. The heating resistor is connected to terminal 7 and 8 of the horizontal terminal strip.
Please specify the operating voltage when ordering as it is required to determine the resistance.
Figure 28: Heating resistor with thermoswitch
Hex nut M4
Thermoswitch
Heating resistor
Self-tapping screw
M3 x 6 DIN 7513
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