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Table of Contents
Related Manuals for Tech Controllers ST-979
Summary of Contents for Tech Controllers ST-979
- Page 1 ST-979 user’s manual...
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Page 2: Safety
TECH Safety Before using the device for the first time the user should read the following regulations carefully. Not obeying the rules included in this manual may lead to personal injuries or controller damage. The user’s manual should be stored in a safe place for further reference. In order to avoid accidents and errors it should be ensured that every person using the device has familiarized themselves with the principle of operation as well as security functions of the controller. -
Page 3: Description Of The Device
ST-979 user’s manual Description of the device ST-979 controller is intended to be used with pellet-fired CH boilers with a fuel feeder and a supply air fan. Thanks to advanced software, the regulator fulfils a wide range of functions: ... -
Page 4: Controller Installation
TECH Controller installation III. The controller should be installed by a qualified person. WARNING Risk of fatal electric shock from touching live connections. Before working on the controller switch off the power supply and prevent it from being accidentally switched How to use the controller IV.a) Principle of operation - Lambda sensor Additionally, the controller operation depends on LAMBDA sensor readings which provide the... -
Page 5: Controller Functions - Main Menu
ST-979 user’s manual Modulation operation algorithm: After successful fire-up the controller switches to modulation mode. It consists of 3 stages depending on current temperature. 1. 100% modulation In this stage the fan and the feeder operate according to user’s settings - Main menu / Modulation settings / 100% modulation. - Page 6 TECH Fire-up / Damping Pre-set CH temperature Fuel tank full CH boiler hysteresis Temperature settings Pre-set DHW temperature DHW hysteresis Pump switch on temperature Operation algorithm Feeding pause Blow force Operation settings* Operation in sustain Pause in sustain Fan in sustain Operation algorithm Modulation 30% Modulation settings**...
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Page 7: V.b) Fire-Up
ST-979 user’s manual V.b) Fire-up Once this option is selected, the fire-up process is initiated. The following stages of this process are described in part IV.b. V.c) Fuel tank full This function should be used after the fuel tank has been fully filled, in order to reset the fuel consumption percentage to 100%. -
Page 8: V.e) Operation Settings
TECH V.e) Operation settings This submenu is available only when Standard operation algorithm is selected. Tap on Operation settings icon in order to adjust CH boiler operation settings. V.e.1) Operation algorithm In this submenu the user may choose between Standard operation algorithm and Modulation. Once Modulation is selected, Operation settings submenu changes into Modulation settings submenu. -
Page 9: V.g) Manual Mode
ST-979 user’s manual After successful fire-up, the controller switches to 100% modulation. When the CH boiler reaches 35⁰C (55⁰C-20⁰C=35⁰C), it switches to 60%modulation. When the CH boiler reaches 45⁰C (55⁰C-10⁰C=45⁰C), it switches to 30% modulation. If the controller cooperates with Lambda sensor, the user also needs to define the pre-set proportion of oxygen in flue gas for each stage of modulation. -
Page 10: V.h.3) Dhw Weekly Control
TECH Example: Monday set: 3 AM, temp -10 C (weekly control setting– 10 set: 4 AM, temp -10 C (weekly control setting– 10 set: 5 AM, temp -10 C (weekly control setting– 10 In this case, if the pre-set temperature of the CH boiler is 60 C, from 3 AM to 6 AM on Monday... -
Page 11: V.i.3) Parallel Pumps
ST-979 user’s manual V.i.3) Parallel pumps In this mode, all active pumps and valves operate simultaneously. The valves maintain the pre- set temperature and the water tank is heated to the pre-set temperature. V.i.4) Summer mode In this mode, the CH valves are closed to prevent unnecessary house heating. In the case when... -
Page 12: V.k) Burning Without Feeder
TECH V.k) Burning without feeder Select this option if the CH boiler is to operate without the feeder function. Once selected, the feeders are disabled and the fans operate according to the parameters saved in service menu. V.l) Screen settings Main screen settings may be customized to satisfy individual user’s needs. -
Page 13: Controller Functions - Fitter's Menu
VI.a) Valve settings ST-979 controller has a built-in module controlling the mixing valve. It is possible to connect two additional modules for controlling valves (e.g. ST-431N). There is a range of parameters allowing the user to adjust the valve operation to individual needs. Once a given valve is activated, the display shows an additional menu offering a range of valve parameters to be configured. - Page 14 TECH Valve OFF Pre-set valve temperature Opening time Valve type Floor Control without room regulator Standard TECH regulator Proportional TECH regulator Room regulator Standard valve regulator Weather-based control Room reg temp lower Room temperature difference Change in set temperature Always ON Always OFF Valve pump ON above threshold...
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Page 15: Vi.a.1) Pre-Set Valve Temperature
ST-979 user’s manual Valve OFF Valve type Floor Opening time Control without room regulator Standard TECH regulator Proportional TECH regulator Room regulator Standard valve regulator Weather-based control Room reg temp lower Room temperature difference Change in set temperature Always ON... -
Page 16: Vi.a.3) Valve Type
Room temperature difference parameters. Activating this room regulator enables the user to monitor current temperature of CH boiler, water tank and the valves. The regulator should be connected to RJ (telephone) socket of ST-979 controller using a four-core cable with appropriate plugs (for RS socket). -
Page 17: Vi.a.5) Weather-Based Control
ST-979 user’s manual VI.a.5) Weather-based control For the function of weather control to be active, the external sensor mustn't be exposed to sunlight or influenced by the weather conditions. After it is installed in an appropriate place, weather control function needs to be activated in the controller menu. -
Page 18: Vi.a.11) Minimum Opening
TECH VI.a.11) Minimum opening The parameter determines the smallest valve opening. Thanks to this parameter, the valve may be opened minimally, to maintain the smallest flow. VI.a.12) Proportionality coefficient Proportionality coefficient is used for defining valve stroke. The closer the pre-set temperature, the smaller the stroke. -
Page 19: Vi.b) Additional Pump 1, Additional Pump 2
ST-979 user’s manual VI.b) Additional pump 1, Additional pump 2 This submenu includes parameters of an additional pump connected to the controller. Once the type of additional pump is selected in the additional pump submenu (next to Pump type function), the following parameters appear in the menu, enabling the user to configure the pump operation. -
Page 20: Vi.b.3) Circulating Pump
TECH Hysteresis This option is used to define the hysteresis of the pre-set temperature. When the pre-set temperature is reached, the pump is switched off. It is switched on again when the temperature on the sensor drops below the pre-set value minus hysteresis. For example, if the pre-set temperature is 60°C and the hysteresis value is 3 °C, the DHW pump is switched off when the set temperature of 60°C is reached, and it is activated again when the temperature drops to 57 °C. -
Page 21: Vi.b.5) Return Protection
ST-979 user’s manual VI.b.5) Return protection Once this option is selected, the additional device serves as return protection (protecting against too low temperature of CH boiler return water). The pump is activated when the CH boiler reaches pre-defined temperature and it is deactivated when the return temperature reaches a satisfactory level. -
Page 22: Vi.e) Cleaning
TECH Grate - operation mode When this function is selected, the grate is active during CH boiler operation. The user defines the frequency of grate activation (Pause time parameter) and its duration (Operation time parameter). During grate operation the fan speed should be higher - use Increase fan revolutions parameter to set the value. - Page 23 ST-979 user’s manual Operation modes The controller may supervise the CH boilers operation in one of the two modes: weather-based control (control based on external temperature value) and modulation (control based on the pre- set CH boiler temperature). NOTE CH temperature and external temperature is sent only from the boiler connected to socket no 1 (the first one on the left).
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Page 24: Vi.b) Time Settings
TECH Modulation In this mode Cascade controls CH boilers operation in order to reach the pre-set temperature. First, one boiler is activated. Once its maximum is reached, the user-defined waiting time elapses (Waiting time parameter). If the pre-set temperature is not reached within this time, another boiler is enabled. -
Page 25: Vi.a) Fuel Level Calibration
A similar procedure is used in the case of opening or closing of the contact input, which may be used as a simple means of property protection. If ST-979 controller is equipped with GSM module, it should be activated by selecting ON option (MENU>Fitter's menu>GSM Module>ON). -
Page 26: Vi.a) Factory Settings
TECH NOTE The code is valid for 60 minutes. If the user fails to register on the website within this time, a new code must be generated. Internet module parameters such as IP address, IP mask, gate address etc may be set manually or by selecting DHCP option. -
Page 27: Technical Data
ST-979 user’s manual Technical data VIII. Specification Unit Supply voltage 230V/50Hz +/-10% Power consumption Ambient temperature 10÷50 Circulating pump output load Fan output load Range of temperature measurement 0÷85 Accuracy of measurement Range of temperature setting 45÷80 Thermal resistance of the sensor -25÷90... -
Page 28: Table Of Contents
TECH Table of contents Safety ........................2 Description of the device .................... 3 Controller installation ....................4 III. How to use the controller ..................4 IV.a) Principle of operation - Lambda sensor ..............4 IV.b) Operation stages: ....................4 Controller functions – main menu ................5 V.a) Block diagram - Main menu .................. - Page 29 ST-979 user’s manual V.i.6) Buffer parameters ..................11 V.j) Thermal disinfection ..................11 V.k) Burning without feeder ..................12 V.l) Screen settings ....................12 V.l.1) Screen view ....................12 V.l.2) Screen brightness ..................12 V.l.3) Screen blanking ..................12 V.l.4) Blanking time .....................
- Page 30 TECH VI.c.2) Standard regulator 1/ Standard regulator 2 ..........21 VI.c.3) Room regulator CH pump ................21 VI.c.4) Fire-up function ..................21 VI.d) Grate ......................21 VI.e) Cleaning ....................... 22 VI.f) Ash remover ....................22 VI.a) Cascade ......................22 VI.b) Time settings ....................
- Page 31 ST-979 user’s manual EU Declaration of conformity Hereby, we declare under our sole responsibility that ST-345 room regulator manufactured by TECH, headquartered in Wieprz Biała Droga 31, 34-122 Wieprz, is compliant with: Directive 2014/35/EU of the European Parliament and of the...
- Page 32 TECH...
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