SC-20
A specialized controller for central heating and DHW heating systems, fireplace, solar collector.
The controller is designed to control the temperature in the solar collector installation. The device controls [OUT1] the collector pump and [OUT2] an additional heat source (boiler, heater). The second source is turned on when, on cloudy days, the energy from the collectors is low and it is necessary to heat the reservoir from another source. The additional output [OUT2] can also be used to control the DHW circulation pump or a valve.
[d] Pliki do pobrania
Dane techniczne
Inputs: | two temperature sensors NTC 5kΩ at 25 ° C B25 /50 = 3470 binary input |
Measurement range: | -50 ... + 150 ° C |
Accuracy of measurement: | +/- 0.5% |
Sampling period: | 500 ms |
Display resolution: | 0.1 ° C over the entire range |
Setting resolution: | 0.1 ° C over the entire range |
Display: | LED, 4 digits 11mm high with graphic icons |
Adjustment method: | ON-OFF with hysteresis |
Outputs: | main: relay 20A 4.5kW, durability 100,000 alarm cycles: relay 8A 1.5kW, durability 100,000 cycles |
Functions: | - 3 controller operation modes: normal, differential, averaging - high and low temperature alarm signaled by sound and relay output - audible signaling of sensor failure and activation of the binary input |
Installation: | in a hole with dimensions: 71 x 29mm |
Degree and class of protection: | IP65 /II |
Power supply: | 230V ~ +/- 15% (in option: 12V = /~ or 24V ~ or 24V = /~) |
Power consumption: | max. 3 VA |
Working conditions: | -5 ... 60 ° C; 0 ... 85% RH (non-condensing) |
Storage conditions: | -40 ... 85 ° C; 0 ... 85% RH (non-condensing) |
Basic information:
- Controlling the collector pump and the second heat source
- DHW pump control
- Protection against freezing and overheating of the tank
- Measurement and setting with an accuracy of 0.1 ° C
- Displaying T1 and T2 alternately
- Beeper
- 2 stainless steel temperature probes included
Mode of operation:The controller will activate the collector pump only after the medium is heated, ie after reaching the necessary difference between the temperature of the tank and the collector [T2-T1]. The second output, depending on its own heating system, controls the tank temperature [T1] activates additional devices:
- as a protection function for the tank against freezing, the controller will activate an additional heat source when the temperature drops below the set temperature, e.g. 5 ° C,
- in the function of protecting the tank against overheating, the controller will turn off the collector pump and activate the circulation pump or valve when the temperature in the tank rises to e.g. 85 ° C,
- in the DHW pump control function, the controller will activate the pump after the water in the tank heats up to the preset temperature, e.g. 40 ° C,
- in the reheating function, the controller will turn on the second heat source if the tank does not reach e.g. 30 ° C within 4 hours.
The value from the collector sensor and the tank sensor is displayed alternately every 3 seconds. You can set the controller to display only one reading. The built-in acoustic signaling signals alarm states. The logic input acts as an alarm input, e.g. it signals a system failure after tripping the STB temperature limiter. In the event of a failure, it will disconnect the entire system with the possibility of maintaining the failure state until it is manually reset with the button.
© ESCO S.C 2024