TECH ST-431 Manuel utilisateur

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ST-431 – user manual

Declaration of Conformity No. 42/2010

Hereby, we declare under sole responsibility that the ST-431

230V 50Hz thermoregulator manufactured by T CH, ul. St.

Batorego 14, 34-120 Andrychów, is compliant with the

Regulation by the Ministry of conomy. (Journal of Laws Dz.U.

155 Item 1089) of July 21, 2007 implementing provisions of

the Low Voltage Directive (LVD) 2006/ 5/EC of January 16,

2007.

The ST-431 controller has been tested for electromagnetic

compatibility ( MC) with optimal loads applied.

For compliance assessment, harmonized standards were

used:

PN-EN 60730-2- :2006.

Paweł Jura, Janusz Master

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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.

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ST-431 – user manual

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I. Application

Thermoregulator type ST-431 is intended for operation of three- or

four-way mixing valve with a possibility of connecting additional valve

pump. Optionally, the controller may cooperate with two modules ST-

61, which enables to control altogether three mixing valves. The

controller is equipped with weather control function,1-week program

and may cooperate with the room regulator.

An additional advantage of the device is the protection of return

temperature, which fulfils the function of protection against boiling of

the water in the short boiler circulation or against too low temperature

of the water returning to the water boiler.

II. Principle of operation

Description of the control panel

The principle of operation of the controller to valve servomotor is based

on mixing feed circulating warm water with water returning from the heating

circulation, in order to set the desired temperature and maintain it all the

time at the same level.

A pump connected to each valve is supposed to help to distribute water in

the system that is not based on gravitation circulation. The pump should be

installed behind the mixing valve, while the temperature sensor should be

placed behind the valve and the pump, for the purpose of the most accurate

control of the temperature at the valve outlet.

ATTENTION: if the valve controller operates simultaneously in a common

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PRESET

TEMPERATURE

VELVE

TEMPERATURE

OPENING

PERCENTAGE

EXIT

PULSE

GENERATOR

STANDBY

MODE

(STANDBY)

ST-431 – user manual

circulation with the controller of the boiler, the pump should be connected

from the boiler controller (pump outlet from regulator TS-431 will remain

disconnected).

The control takes place with the use of pulse generator knob. ntering

the menu and confirming settings proceed by pressing the knob. When

turning it, a user operates in M NU functions. To go to the higher level menu,

use exit button. Any settings may be changed in a similar manner.

II.a) Main page

During normal regulator operation , graphic display shows the

homepage, on which the following are displayed:

Valve type:

- CH

- Floor

By turning the pulse generator, the preset temperature may be changed

easily. After pressing pulse generator knob, the user moves to the main

menu.

To change appearance of the homepage to the view of temperature

sensors or one of the additional valves (if active), press XIT. Then, after

choosing another screen, homepage view is changed.

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ACTIVE MODULES

WORKING

PUMP OPERATION

BOILER

PROTECTION

HOUR

ACTIVE VALVE

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III. Main menu

III.a) Set temperature

With this option, the requested temperature the valve is supposed to

maintain, is set. In the course of correct operation, the temperature of water

behind the valve will be approaching the preset valve temperature.

III.b) Activated

This option is used to activate the mixing valve. When the valve is

deactivated, then the pump does not operate, either. In spite of the fact that

valve is deactivated, calibration always takes place after switching the

controller to the network. It prevents remaining of the valve in a position

dangerous (see chapter III.d) for the circulation.

III.c) Screen view

Using this function, appearance of the homepage may be changed

between the views of the basic valve, the view of the sensors' temperatures

or the view of parameters of one of additional valves (only when the valves

are active). After selecting the view sensors' temperatures, on the homepage

the following temperatures are visible: of the valve (set and current), return

temperature and external temperature. On the contrary, selection of the view

valve 1 or valve 2 results in displaying on the homepage parameters of the

closed valve: preset and current temperatures, external temperature and

return temperature, and the percentage of opening of the chosen valve.

III.d) Valve calibration

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ST-431 – user manual

Using this function, initial setting of the valve is controlled. During

calibration, the valve is set to a safe position, that is, for CO valve, to a fully

open position, while for floor valve - to a closed position. During calibration, at

the bottom of the screen, the following symbol is displayed: .

III.e) Manual operation

After selecting the option manual operation, the user has the possibility

of manually opening/closing the valve (and additional valves, if active) and

switching on or off the pump for the purpose of inspection of the correct

operation of the device.

III.f) Installer menu

Functions included in installer menu will be described in detail in

subsequent chapters of this manual.

III.g) Servicing menu

Functions included in the servicing menu are protected by code and are

not available for the user.

III.h) Language selection

A user can select the language version of the controller.

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III.i) Factor settings

The regulator is pre-configured for operation. However, it should be

adjusted for own needs. Return to the factory settings is possible at any

moment. By activating the factory settings option, all own adjustments are

replaced by the settings saved by the manufacturer. From that moment, the

own parameters may be set once again.

III.j) About the program

After activating this option, the display shows the boiler manufacturer's

logo along with software version of the regulator.

IV. Installer menu

IV.a) Summer mode

In this mode the regulator closes CO valve, so as not to heat house

unnecessarily, but in the case of achieving, too high temperature of the boiler

(requires activation of the return protection!) the valve will be open in

emergency mode. This mode is not active in the case of controlling floor

valve.

IV.b) 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.

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ST-431 – user manual

IV.c) Boiler sensor

In this submenu, the user determines basic boiler protection parameters

and pump activation.

IV.c.1) Return protection

This function permits setting the boiler protection against too cool water

returning from the main circulation, which could cause low-temperature boiler

corrosion. The return protection operates in the way that when the

temperature is too low, valve is closed, until the short circulation of the boiler

reaches the appropriate temperature. After activating it, user presets the

minimum acceptable return temperature.

IV.c.2) Boiler protection

The protection against too high return temperature serves to prevent

the hazardous growth in boiler temperature. The user sets the maximum

acceptable return temperature. In the case of the hazardous growth in

temperature, the valve begins to open to house installation in order to cool

the boiler down. This function is activated permanently (the possibility of

deactivation only in the service menu).

IV.c.3) Pump activation

This option allows to select the working mode of a pump. A pump shall

be activated: always (pump operates all the time, regardless of

temperatures), never (pump is permanently deactivated and the regulator

controls only operation of the valve, above the threshold (the pump is

activated above the set activation temperature ). In the case when the

circulation pump is connected with the boiler controller, it is recommended to

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