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RAK75 / © Ensto 2018
ECO920 Thermostat
Installation and Operation instructions
1. Introduction
ECO920 is a microprosessor controlled thermostat equipped with a LCD display.
2. Safety Instructions
•
Installation must only be carried out by an electrically skilled person.
•
Read the installation instructions carefully before starting the installation work.
•
The information provided in this manual in no way exempts the user of responsibility to follow all ap-
plicable codes and safety standards.
•
The instruction manual must be stored in a safe location and be available for future installation and
service.
3. Included in the package
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ECO920 thermostat
•
ECOA909 temperature sensor
•
Installation and operating instructions
4. Operation modes
The thermostat has four operation modes. The operation mode can only be installed in the
START UP
menu, which is shown the first time the thermostat is started or after the thermostat has been reset.
4.1 Heating
HEAT
mode is used in homes, offices, storerooms and such like. You can use the thermostat as a room or
floor thermostat or as a room thermostat with overheating protection for wooden floors. You can regulate
the heating within a temperature range of +5 ... +45 ºC.
4.2 Cooling
COOL
mode is used in homes, offices, storerooms and such like. The thermostat works as a room thermo
-
stat for regulating air conditioning or other cooling within a temperature range of +5 ... +45 ºC.
4.3 Industry
INDUSTRY
mode is used in industrial environment to regulate the temperature of industrial processes,
high temperatures or for frost protection of sensitive installations. You can regulate temperatures within
the ranges -15 ... +75 ºC and 0 ... +170 ºC. You can limit the temperature range -10 ... +15 ºC for frost protec-
tion purposes. You can adjust temperature hysteresis as well as set upper and lower temperature alarms.
4.4 Frost Protection
MAX/MIN
mode is used to keep roof and ground surfaces free of snow and ice. You can adjust the frost
protection within a temperature range of -20 ... +10 ºC.
5. Installation and electrical connections
See the wiring diagram on page 52.
Disconnect the power supply before carrying out any installation or maintenance work on this ther-
mostat and associated components.
•
The thermostat is intended for mounting in a panel board. Attach the device onto a DIN rail.
•
The thermostat does not have a main switch in itself, but it has to be installed elsewhere in the circuit.
•
A residual circuit breaker has to be used according to the local installation regulations.
•
Sensors in accordance with the used application should be installed to ensure proper operation and
energy saving.
ENG
