Heat Source; Protection - ENGO CONTROLS EWT100 Operation And Installation Manual

10.2 Heat source

Support
Histeresis
Min. temperature
Max. temperature
Buffer
Buffer preset temp.
Cooling temp.
HW priority
Switching off from the
thermostat
Increrase temp.

10.3 Protection

Return sensor
Min. temperature
Histeresis
Closing the valve
Frost protection
Frost protection delay
Frost protection temp.
EWT100 FULL MANUAL
ON or OFF the support heat source for the heating circuit.
Hysteresis for heat source. The heat source is turns on at a preset temperature of water - Hysteresis. The heat
source is turns off at the preset temperature of water + Hysteresis.
The minimum temperature of the heat source and the same minimum temperature for the heating circuit.
The maximum temperature of the heat source and the same maximum temperature for the heating circuit.
Buffer support: • No – heating circuit is operating, but the heat source is not heated up despite the heat source
preset temperature drop. • Yes – the heating circuit operation is off, the heat source operates independently in
order to increase its temperature to the Buffer preset temperature value.
Temperature for the heat source, when the buffer support is turned on.
Temperature value at which heat excess is discharged to the heating circuit. It is protection against overheating.
• ON – When the temperature of the heat source is lower than the Min. temperature for the circuit, the controller
lowers the circuit preset temperature, but only when there is no active reduction from the operation mode. • OFF
– the regulator does not reduce the circuit preset temperature.
Turns off the heat source when the thermostat contact is triggered.
Increase of the heat source preset temperature above the heating circuit preset temperature.
Turns on or off support of the return temperature sensor. Enabling the sensor support shows additional
parameters related with the function of protecting the boiler return from cold water. It is realized through a
mixing valve with an electric actuator. Note: Do not turn sensor support if there is no electric actuator mounted
on the valve! This function is not available when the return sensor is not connected or its support is disabled.
The temperature below which the electric actuator turn a blind mixing valve.
Electric actuator will return to normal working at return temperature ≥ Min. temperature + Hysteresis.
It is % opening to the mixing valve during active the return protection function.
Time delay for enable frost protection function. Description later in this manual.
The temperature below which the frost protection function is activated . Description later in this manual.
Function activation results in valve closing.
Note: The valve closes with an accuracy of +-1%.
ON or OFF frost protection function.
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