Installation And Electrical Connection; Overheating Protection; Additional Accessories - Ventmatika EKA Series Technical Data, Mounting, Maintenance

ELECTRICAL CIRCULAR DUCT HEATERS
5 – Additional accessories:
PS – Differential pressure switch for air flow detection
PTC – Sensor for minimum air velocity detection
PTC/PS – Sensor for minimum air velocity detection and diff. pressure switch for air flow detection
PTC/K – Sensor for minimum air velocity detection and contactor for overheating protection
PH – Sensor for minimum air velocity detection and diff. pressure switch for air flow detection
2NTC – 2 sensors for the air temperature measuring
PTC/2NTC – Sensor for min. air velocity detection and 2 sensors for the air temperature measuring

Overheating protection

In the electrical duct heaters EKA are installed two thermostats for overheating protection. The
first one with automatic reset, turns off the heating when the temperature reaches 50 °C and turns
on when the temperature drops below 50 °C. The second with manual reset, turns off the heating
when the temperature reaches 100 °C. Only way to reset it, push the reset button on the top of the
casing (see mounting examples) when the temperature drops below 100 °C.
In the heaters EKA ESKM are installed additional thermostat (with automatic reset) for
controller ESKM overheating protection. This thermostat turns off the heating when the temperature
reaches 70 °C and turns on when the temperature drops below 70 °C.

Installation and electrical connection

Electrical duct heaters EKA can be installed horizontally in any position except electrical
connection box downward and vertically (only if the air flow direction upwards
Heaters can't be installed in explosive and aggressive substances environment. Heaters can be
used only for the clean air heating or preheating. Heaters intended only for inside installation. If
heater is installed in such way that can be accidental contact with heating elements, protective grill
must be installed. The air velocity in the duct of the heater must be 1,5 m/s minimum.
Fig. 1. Heaters installation positions
EKA
(see Fig. 1).
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