TECH ST-85 User Manual
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TECH ST-85 User Manual

230v 50hz thermoregulator
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Summary of Contents for TECH ST-85

  • Page 2 ST-85 – USER'S MANUAL TECH Declaration of Conformity No. 35/2010 Hereby, we declare under sole responsibility that the ST-85 230V 50Hz thermoregulator manufactured by TECH, ul. St. Batorego 14, 34-120 Andrychów, is compliant with the Regulation by the Ministry of Economy. (Journal of Laws Dz.U.
  • Page 3 ST- 85 – USER'S MANUAL ATTENTION! IGH 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, check the boiler and inspect wire insulation.
  • Page 4 Blow...

  • Page 5: Description

    The regulator is used for controlling the central heating water circulation pump, hot consumption water pump and blow (fan). The ST-85 is a PID-basedcontroller using a continuous signal. In this type of controllers, the fan power is calculated based on boiler temperature and flue gas temperature measured at the boiler outlet.
  • Page 6 ST-85 – USER'S MANUAL emissions. The thermal energy from the flue gases is used for heating instead of being wasted and disposed of through the funnel. Research results presented below were obtained using the Tech PID-based controller: and the controller without PID control: You can change all parameters with an encoder knob.
  • Page 7 ST- 85 – USER'S MANUAL I.a) Basic Terms Fire up. The cycle begins when you activate the fire up function in the controller's menu and is active until the central heating boiler temperature reaches 40 C (the default fire-up threshold), on condition that the temperature does not drop below this value for 2 minutes (the default fire-up time).

  • Page 8: Regulator Functionality

    ST-85 – USER'S MANUAL In case of voltage loss, the regulator ceases to operate. When power is restored, the controller returns to operation with previously set parameters using its built-in memory. Lack of voltage does not cause the stored parameters to be lost.

  • Page 9: Ii.b) Changing The Central Heating And Hot Consumption Water Setpoint Temperature

    ST- 85 – USER'S MANUAL II.b) Changing the central heating and hot consumption water setpoint temperature. In order to change the setpoint temperature of the central heating (while in "C.H. screen" main view), turn the encoder knob and (after setting a desired value) press it to confirm the change.

  • Page 10: Ii.d) Manual Mode

    ST-85 – USER'S MANUAL II.d) Manual Mode C.H. Setpoint * For your convenience, the regulator features a manual mode module. In this mode, each individual actuator is enabled and disabled independently of the other. In addition to the Manual Mode function, the Blow Force function has been provided.

  • Page 11: Ii.e) Fuel Type

    ST- 85 – USER'S MANUAL II.e) Fuel Type Manual Mode Coal Fines C.H. Setpoint Fuel Type This option allows you to select one of three fuel types (coal, fines wood) for use in the boiler. Each fuel type has a fan operation mode assigned to ensure the right burning process.

  • Page 12: Ii.h) Operation Mode

    ST-85 – USER'S MANUAL II.h) Operation Mode H.C.W. Pump Activation Operation Mode C.H. Setpoint With this function, you can select one out of four operation modes. II.h.1) House Heating House Heating * H.C.W. Priority If you select this option, the regulator will switch to the house heating mode.

  • Page 13: Ii.h.3) Parallel Pumps

    ST- 85 – USER'S MANUAL While in the H.C.W. Priority mode, the icon is displayed in the up right corner of the main screen. ATTENTION: The boiler should have non-return valves mounted on the central heating pump circuit and the hot consumption water pump circuit. A valve mounted on the hot consumption water pump will prevent hot consumption water from being drawn from the water heater.

  • Page 14: Ii.i) Main Screen

    ST-85 – USER'S MANUAL running in order to heat water in the water heater. The pump is switched on above predefined activation threshold (see pump activation temperature function) and will run until the setpoint temperature has been reached. The pump will start again when the temperature drops below the set hysteresis.

  • Page 15: Ii.j) Language

    ST- 85 – USER'S MANUAL setting the appropriate value, confirm it by pressing the encoder knob. FLUE GASES SCREEN ➢ H.C.W. SCREEN c 93 C.H. FLUE • FLUE GASES SCREEN The following items are displayed, starting from the left: current C.H. temperature, current flue gases temperature and blow power in percentages.

  • Page 16: Protections

    ST-85 – USER'S MANUAL III. Protections In order to ensure a safe and faultless operation, the regulator has been provided with numerous protections. In the case of an alarm, an acoustic warning is sounded and the display shows a corresponding message.

  • Page 17: Iii.c) Temperature Protection

    ST- 85 – USER'S MANUAL pump mode. To be able to operate the boiler in all modes, it is necessary to replace the sensor. III.c) Temperature Protection The regulator features an additional protection in case the bimetal sensor is damaged. After the temperature exceeds 85 C, the alarm is sounded with the display showing the following message: Alarm...

  • Page 18: Iii.e) Monitoring The Flue Gas Outlet Temperature

    IV. Maintenance Before and during the heating season, the ST-85 controller should be checked for condition of its cables. You should also check if the controller is properly mounted and clean it if dusty or dirty. It is advisable to measure...

  • Page 19: Assembly

    ST- 85 – USER'S MANUAL ST-85 Technical Specifications No. Specification Unit Supply Voltage 230V/50Hz +/-10% Power consumption Ambient temperature 5÷50 Circulation pump outlet load Fan outlet load Temperature measurement range 0÷90 Measurement accuracy Sensor thermal resistance -25÷90 Fuse insert 3,15 V.
  • Page 20 ST-85 – USER'S MANUAL - 20 -...
  • Page 21 ST- 85 – USER'S MANUAL We are committed to protecting the environment. Manufacturing electronic devices imposes an obligation of providing for environmentally safe disposal of used electronic components and devices. Hence, we have been entered into a register kept by the Inspection For Environmental Protection.

  • Page 22: Table Of Contents

    ST-85 – USER'S MANUAL Table of Contents I. Description..................5 II. Regulator Functionality..............8 II.a) Main Page.................. 8 II.b) Changing the central heating and hot consumption water setpoint temperature..................9 II.c) Firing up..................9 II.d) Manual Mode................10 II.e) Fuel Type................. 11 II.f) Central Heating Pump Activation..........11...
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  • Page 24 ST- 85 – USER'S MANUAL - 24 -...

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