Central Heating Pump Controllers ST-427i

sterownik ST-27

Controller Functionality

control of three pumps on the basis of the measurement of temperatures or on a time basis
anti-stop function
anti-freeze function
the possibility of setting any priorities of pumps
the possibility of connecting room regulator

Controller Equipment

LCD display
three temperature sensors
knob of the pulse generator
casing made of high quality materials resistant to high and low temperatures

Principle of operation

ST-427i regulator is intended to control the operation of three pumps. The controller's task is to switch the pumps on (temporarily if the temperature exceeds the threshold value of activation) and off when the boiler cools down (e.g. as a result of burnout). If a selected pump is not a CH pump, apart from activation temperature, the user adjusts the set temperature up to which the pump will operate. There is a possibility to set any priorities of the pumps' operation.

Technical data

Specification	Unit
Power supply	V	230V/50Hz +/-10%
Maximum power consumption of the controller	W	4
TAmbient temperature	°C	5÷50
Maximum output load of pumps	A	1
Range of temperature settings CH	°C	30÷75
Range of temperature settings HUW	°C	20÷75
ZRange of temperature settings floor	°C	30÷75
Hysteresis	°C	1÷20
Accuracy of measurement	°C	1
Temperature strength of the sensor	°C	-25÷90
Fuse insert	A	3,15