Description
In order to obtain conclusions on the economics of the system, the switch-on of the relay (running times of the pumps) and the sensor 1 to sensor 2 and stored measured minimum and maximum temperature. All operating parameters, such as the temperature difference is to switch in the device, the hysteresis, the minimum value for the solar panel temperature and the maximum value for the storage temperature, are easily programmable via keyboard. All programmed values are retained even when the power fails, ie after a power failure, the system works right on again. Even the determined switch-on of the relay and the stored min. / max. Temperatures will remain. Note: The operating parameters are saved when switching from manual mode (programming mode) for automatic operation. The maximum and minimum values are stored in the automatic mode every 3 hours. All measurements (solar panel temperature, storage temperature, temperature difference), and all programmed operational parameter (difference, hysteresis, Min-/Max, relay switch times) can on a 2 x 16 digit display can be queried. In order to prevent calcification of the storage heater, a maximum storage temperature can be programmed. Upon reaching this temperature, a second relay switches, which are controlled, for example, a bypass valve or a second pump. For any possible emergency operation, both relays are switched manually by pressing a key. The switching states of the relays are displayed via LEDs. If a sensor failure possibly both relays are activated to prevent overheating of the plant. The wide adjustment range of the device for use in swimming pool solar heating systems and similar applications is suitable. The minimum temperature at the heat source can, for example are used in combination with solid fuel. By following a minimum temperature in the heat generator, the flue gas condensation is avoided on the boiler walls.
Technical data:
Operating voltage: 230 V/50 Hz
Power consumption: max. 1.5 VA (without display illumination)
max. 3.5VA (with lighting)
Temperature range: 0 ° C. …. 99 ° C
Temp rise 1 ° C. … 30 ° C
Hysteresis: 1 ° C. … 20 ° C
Min value (sensor N1): 1 ° C. .. 99 ° C
Maximum value (sensor N2): 20 ° C. .. 99 ° C
Sensors: PT 1000 (2 pieces needed)
Relay output: two floating changeover contacts, one to switch a circulating pump and one for switching to an alarm signal or auxiliary pump or bypass valve
Switching capacity per relay: 1000 Watt
Dimensions (housing) 160 x 120 x 64 mm
