ensto ECO910 Betriebsanleitung - Seite 7

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ECO910 FROST PROTECTION THERMOSTAT

ENG

1. INTRODUCTION

The ECO910 is a device for the control of frost protection in outdoor areas, ramps, roofs and rainwater

systems. There is no main switch in the product but it has to be placed elsewhere in the circuit. A residual

circuit breaker has to be used according to the local installation regulations (see Fig. 2).

2. INSTALLATION

The device should be installed on the DIN rail in accordance with Figs. 1 and 2.

3. OPERATION

The set values of the thermostat are adjusted by rotating the adjusting wheels with a screwdriver (Fig. 3).

Frost protection of outdoor areas, see Fig. 4.

Both two sensors are used for frost protection in outdoor areas. Sensor 1 measures the air temperature

and should be installed inside a suitable enclosure (e.g. AP9), so that it is protected from direct sunlight.

The resistor has to be removed from the Sensor 2 connectors and replaced with sensor that measures

the ground temperature. The sensor cable must be placed in a protective tube between heating cables.

NOTE! Make sure that there is not water in the protective tube.

The leftward adjusting wheels are for adjusting the temperature limits for SENSOR 1 and the rightwards

for SENSOR 2.

The upper adjusting wheels are for adjusting the upper limits and the lower adjusting wheels for adjusting

the lower limits. The heating is switched on when the temperature of both sensors is between the min and

max set values.

The suitable set values are dependent on the application. We recommend using the following set values

for frost protection in outdoor areas:

Air sensor:

Sensor 1 HIGH: +5 °C

Sensor 1 LOW: -30 °C

Ground sensor:

Sensor 2 HIGH: +2 °C

Sensor 2 LOW: -15 °C

Frost protection of rainwater systems, see Fig. 5.

Only one sensor is used for frost protection in rainwater systems. The resistor has to be in its place in the

Sensor 2 connectors. Sensor 1 measures the air temperature and should be installed inside a suitable

enclosure (e.g. AP9), so that it is protected from direct sunlight.

The adjusting wheels for Sensor 2 have to be adjusted to their extreme positions (HIGH for max and LOW

for min).

The upper limit for the temperature is set by adjusting the Sensor 1 HIGH adjusting wheel and the lower

limit by Sensor 1 LOW.

The heating is switched on when the temperature of the sensor is between the min and max set values.

The suitable set values are dependent on the application. We recommend using the following set values

for rainwater systems:

Sensor 1 HIGH: +5 °C

Sensor 1 LOW: -5 °C