Tech Controllers ST-19 User Manual page 5

The sensor should be installed on the CH boiler output with the use of a cable tie and protected from the
influence of external factors with the use of an insulating tape (it cannot be dipped in any liquid).
The pump power cord should be connected in the following way: blue and brown:230V, yellow-green
(protective) should be earthed.
The distance between the mounting holes is 110mm.
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7
1. Potentiometer
2. Power supply switch
3. Fuse 1,6A
4. Power cord
5. CH pump output
6. Temperature sensor
7. Manual operation switch
8. Control light indicating manual operation
9. Control light indicating power supply
10. Control light indicating pump operation
ST-19 antystop is intended for controlling the central heating pump (CH). The main task of the controller is to
activate the pump when the pre-set temperature value is exceeded and deactivate it when the CH boiler
cools down (due to damping). Such characteristics prevent unnecessary pump operation, which saves
electricity (up to 60% depending on the CH boiler use), extends the life of the pump. It also enhances its
reliability and reduces the maintenance costs.
ST-19 controller offers anti-stop function which prevents CH pump stagnation. The pump is activated every
10 days for 1 minute. Additionally, every hour the time data is saved in non-volatile memory (EEPROM),
which ensures that the timing is continued even in the event of voltage failure.
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