50
Zehnder Eversky
17.1. Electric heating coil (BE)
500
750
900
1100
Rated voltage
~1 - 230 Vac – 50 Hz
Rated current
4,3 A
5,4 A
Rated power
1000 W
1250 W
(1) Heating element
(2) Safety thermostat THS
(3) Reset button
(4) Thermostat bulb
(5) SSR Solid State Relay
17.2. Defrost coil (DBE)
500
750
900
1100
Rated voltage
~1 - 230 Vac – 50 Hz
Rated current
4,3 A
5,4 A
Rated power
1000 W
1250 W
(1) Heating element
(2) Safety thermostat THSD
(3) Reset button
(4) Thermostat bulb
(5) SSR Solid State Relay
17.3. Safety thermostats THS and THSD
The safety thermostats THS and THSD protect the electric heating and preheating coil (if fitted) and their immediate
surroundings from excessive overheating, e.g. in the event of a failure of a control element (contactor, solid-state relay,
controller, etc.) or of the supply fan.
17.3.1. Location
The safety thermostat THS is located on the heater support plate, see XVII.1 Electric heating coil (BE).
The THSD safety thermostat is located on the heater support plate see XVII.2 De-icing coil (DBE).
17.3.2. Electrical connections
The safety thermostats THS and THSD are of type NC (Normally Closed). The contact opens when the bulb temperature
exceeds 90 °C (not adjustable). The electrical connection is made between terminals (C) and (2) according to the wiring
diagram, see XVIII GENERAL WIRING DIAGRAM.
