Agromatic ESR-NK Series, Installation And Operating Manual, Page: 57 / 98

5 Assembly 5.7 Anti-condensate heater (option)
Actuators NK and VK, Position Controller ESR-NK 51
5.7 Anti-condensate heater (option)
The anti-condensate heater is a heating resistor. This resistor is connected to
the mains voltage (terminals 27 and 28, see section
“5.3.3 Schematic dia-
gram for alternating current” ) to generate the heat output.
NOTE
If the ambient temperature varies during the installation, the heating resis-
tor must be connected immediately to the voltage supply and remain con-
nected during start-up to avoid condensation within the actuator.
Heating resistor data:
U
heating_resistor
= 230V, P
heating_resistor
≈ 3W
Heating resistors with 24V/2W or 115V/3W are available as options.
5.8 Installing the hood
When all connecting and setting work has been completed, the hood must be
installed again on the actuator using the two hood screws. Verify during the
assembly that the serial number of the hood matches the serial number of the
actuator.
The following defaults must be observed during the installation:
−
Make sure that the circumferential sealing ring in the actuator housing is
properly seated and undamaged.
−
The hood must be undamaged, this applies in particular to the surface
resting on the actuator housing.
−
Evenly tighten the hood screws to the prescribed torque of 1Nm in a
crosswise pattern.
−
Before its installation or removal, the hood must be dry so as to protect
the electrical components inside the actuator against humidity.
Important information!
The hood screws are protected from falling out by an O-ring. They must
not be pulled out of the hood!