TECH ST-408 User Manual
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TECH ST-408 User Manual

Installation controller
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Summary of Contents for TECH ST-408

  • Page 1 Tech - 1 -...
  • Page 2 ST-408 – user's manual Declaration of Conformity No. 44/2011 Hereby, we declare under sole responsibility that the ST-402 230V 50Hz thermoregulator manufactured by TECH, headquartered in Wieprz 1047A, 34-122 Wieprz, is compliant with the Regulation by the Ministry of Economy. (Journal of Laws Dz.U.
  • Page 3 Tech ATTENTION! High voltage! Make sure the regulator is disconnected from the mains before working on the power supply (cable connections, device installation, etc.)! All connection works must only be carried out by qualified electricians. Before activating the controller, measure the motor resetting efficiency and inspect wire insulation.
  • Page 4 ST-408 – user's manual - 4 -...

  • Page 5: Application

    Tech I. Application ST-408 type thermoregulator is intended for the operation of central heating system installation. The controller supports two mixing valves and HUW pump (boiler pump). Optionally, controller may co-operate with two ST-61 modules, which allows to control four mixing valves altogether.

  • Page 6: A) Main Page

    ATTENTION: if the valve controller operates, at the same time, in a circulation common with the furnace controller, the pump can be connected from the furnace controller (the outlet of such pumps from ST-408 type regulator or from an additional module will remain disconnected).

  • Page 7: Main Menu

    Tech III. Main menu III.a) VALVE 1 In this submenu, a user sets the basic parameters of the first valve. III.a.1) Preset temperature With this option, the requested temperature is set, and VALVE 1 is supposed to maintain it. The temperature can be also changed directly from the controller main screen when Temp 1 view is active.

  • Page 8: C) Huw Pump (Boiler Pump)

    ST-408 – user's manual III.b) Valve 2 In this submenu, a user sets the basic parameters of the first valve, the same as for valve 1 settings. III.c) HUW pump (boiler pump) This function is used to set HUW pump working parameters.

  • Page 9: D) Circulation Pump

    Tech III.c.4) HUW pump activation threshold This option is used to set HUW pump activation temperature (it is the temperature measured at the furnace sensor). The pump does not work below the preset temperature, and above this temperature the pump is activated and works till achieving the preset temperature.
  • Page 10 ST-408 – user's manual III.f) Operational Modes In this function, as necessary, the user activates one mode from three installation working modes. III.f.1) Boiler priority In this mode, firstly, the boiler pump (HUW) is activated until reaching HUW preset temperature (valves close maximally and valve pumps are deactivated), after reaching it, the pump is deactivated and mixing valves are activated (together with pumps –...

  • Page 11: G) Installer Menu

    Tech III.h) Installer menu Functions included in installer menu will be described in detail in subsequent chapters of this manual. III.i) Language selection A user can select the language version of the controller. III.j) Factory settings The regulator is pre-configured for operation. However, it should be adjusted for own needs.

  • Page 12: Installer Menu

    ST-408 – user's manual IV. Installer menu IV.a) Pump anti-stop After activating this option, pump valve will activate every 10 days for 2 minutes. It prevents too long water stagnation in the assembly beyond the heating season. IV.b) Furnace sensor In this submenu, the user determines basic furnace protection parameters and pump activation.
  • Page 13 TECH regulator is equipped with RS communication and is connected to the controller with a four-core communication wire (RJ type – "telephone" plugs). ST-408 controller may serve only for one TECH room regulator (it can be additionally connected to two standard regulators).
  • Page 14 ST-408 – user's manual IV.e.1) Temperature control This parameter determines water temperature measurement (control) frequency behind the CH or HUT installation valve. If the sensor indicates a change in temperature (deviation from the set value), then the electric valve will open or close by the set stroke, in order to return to the preset temperature..

  • Page 15: C) Tech Regulator

    <difference of room temperatures parameters (see chapter IV.c.8 and 9). This regulator should be connected to RJ (telephone) sockets of ST-408 controller by means of a four - core wire ended with the appropriate plugs (to the socket at the back of the controller).
  • Page 16 ST-408 – user's manual IV.e.7) Weather sensor (weather-based control) To activate the weather function, external sensor should be placed in the place which is not insolated and not exposed to atmospheric impacts. After installation and connection, a sensor should have the function Weather sensor activated in a controller menu.
  • Page 17 This setting determines by how much degrees the temperature will increase or decrease at the single room temperature change (see: difference in room temperatures). This function is active only with the TECH room regulator and is strictly related to difference in room temperatures parameter.
  • Page 18 ST-408 – user's manual IV.e.12) Maximum floor temperature This is the maximum temperature, which does not damage floor installation. Setting this temperature is used, when valve type is set as the floor type. After reaching this temperature, a complete valve closure takes place, and a user is informed about that by means of a relevant alarm.
  • Page 19 If TECH type room regulator is used, valve will work all the time according to <change in the preset valve temperature> and according to <difference in room temperatures>...
  • Page 20 ST-408 – user's manual IV.e.16) Weekly regulator (weekly program) This function is used for programming daily temperature changes behind the valve. The set temperature deviations are in the range of +/-10 Step one: A user must first set the current time and date (Installer menu> Timer).

  • Page 21: C.1) Temperature Control

    Tech set: 5 AM, TEMP -10 C (temperature change – 10 Saturday-Sunday set: 4 PM, temperature 5 C (temperature change + 5 set: 5 PM, temperature 5 C (temperature change + 5 set: 6 PM, temperature 5 C (temperature change + 5...

  • Page 22: C.2) Opening Time

    (it should be selected whether the measurement of the furnace ➢ sensor and return sensor is to be read from the main controller – ST-408 or from ST-61 module output – own sensors) change in the preset valve temperature ➢...
  • Page 23 If ST-408 controller is equipped with an additional GSM module, in order to activate this device, it is required to start the activated option (MENU>...

  • Page 24: Protections

    ST-408 – user's manual setting the time, correct operation of the weekly control is not possible. IV.k) Pulse generator sensitivity Using this setting, the sensitivity of the pulse generator knob may be changed in the range between 1 and 3 (where 1 is the highest sensitivity).

  • Page 25: Maintenance

    V. Maintenance In ST-408 controller, technical condition of wires should be checked before the heating season and throughout its duration. Fastening of the controller should be also checked, it should be cleaned from dust and other dirt.
  • Page 26 ST-408 – user's manual Demonstrative installation diagram - 26 -...

  • Page 27: Table Of Contents

    IV Installer menu........................12 IV. a) Pump anti-stop ......................12 IV. b) Furnace sensor......................12 IV. b.1) Return protection....................12 IV. b.2) Furnace protection....................12 IV. c) TECH regulator......................13 IV. c) Voltage-free contact.....................13 IV. c) Valve 1........................13 IV. c.1) Temperature control ....................14 IV. c.2) Opening time......................14 IV.
  • Page 28 ST-408 – user's manual - 28 -...

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