Tech Controllers EL480zPID Manual de usuario

User manual

EL480zPID

User manual

Declaration of Conformity No. 60/2010

Hereby, we declare under sole responsibility that the ST-480

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.

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

Low Voltage Directive (LVD) 2006/95/EC of January 16, 2007.

The ST-480 controller has been tested for electromagnetic

compatibility (EMC) with optimal loads applied.

For compliance assessment, harmonized standards were used:

PN-EN 60730-2-9:2006.

EL480zPID

User manual

I. Description

EL–480 temperature controller is intended for use with central heating boilers equipped with

feeding screw. It controls water circulation pump, domestic hot water pump, floor heating

pump, circulation pump, blower (fan) and fuel feeder. It incorporates a valve control module

and can operate with two mixing valves (via additional ST-61 modules), conventional (two-

state) room controller or RS-port communication, GSM module or Ethernet module.

The advantage of the controller is the ease of use. The user can change all parameters

using the pulser knob. Another advantage is the large and easy-to-read display where the

current boiler operation parameters are shown.

Exemplary view of the main screen:

Any remarks regarding the programme should be reported to the boiler manufacturer. Each

driver should be adjusted according to individual needs depending on the fuel type used and

the boiler type. TECH shall not be held liable for wrong adjustment of the controller.

The EL480zPID controller is a unit with a continuous output signal using a modified PID control

algorithm. In this type of controller the blowing power is calculated by measuring the boiler

temperature and the flue gas temperature as measured at the outlet of the boiler. The fan is

run continuously and the blowing power depends directly on the measured temperature of the

boiler, the flue gas temperature and the difference between these parameters and their set-

points. The advantages of a modified PID controller include the ability to maintain a stable set-

point temperature without any unnecessary overshoot or oscillations.

When using this type of controller equipped with a flue gas outlet sensor fuel savings can

be achieved from a few percent up to around 15 percent with the output water temperature

kept at a very stable label, resulting in longer life of the exchanger (boiler). As the flue gas

temperature at the boiler outlet is controlled this results in low emissions of dust and gases

that are harmful to the environment. The thermal energy of the flue gas is not wasted and

released into the chimney, but is instead used for heating.

Below we present the results of tests conducted with the use of the Tech controller with PID

control:

EL480zPID

and the same controller without PID control:

Basic terms

Operation–once activated the controllers enters the operation mode and a "WORKING"

message appears on the display. It is the basic state of the controller where the blower is

operating continuously and the feeder operation time is set by the user (both operation time

and pause time can be set).

Sustain mode–the mode is entered automatically if the temperature is higher than or equal

to the preset temperature. In such a case the controller feeds the fuel slowly to reduce the

temperature smoothly and a "SUSTAIN" message appears on the display. Both pause time and

operation time in sustain mode have to be configured for the temperature to be reduced

properly.

II. Functions of the controller

This chapter describes the controller functions, methods of changing the settings and use of

the menu with the pulser (knob). The main controller screen displays boiler operating

parameters. Operation mode and a number of other settings can be selected by the user

according to the individual needs.

II.a) Main page

Main page is displayed on the graphic display during normal operation of the controller. Other

main screens are displayed according the operation mode.

Once the pulser knob is pressed the first level menu appears. The display shows three initial

menu options. Further options are available after turning the knob. An option can be selected

User manual

by pressing the knob. Similar procedure is followed when changing the parameters. In order

for the changes to be input they need to be confirmed by pressing the pulser after the

"CONFIRM" message appears. If the user does not intend to make any changes in a function

the pulser should be pressed after the "CANCEL" message is displayed. Select "EXIT" in the

menu or use EXIT button to exit the menu.

Stand-by mode button located on the controller housing allows disabling all operating units

quickly, if necessary. It serves as an additional emergency protection to cut-off power supply

to all operating units of the controller (feeder, fan, pumps).

ATTENTION: Power supply to the controller is not cut-off in the stand-by mode.

II.b) Screen view

The user can select one of three main screens of the temperature controller operation using

that function. They include:

central heating screen (displays current boiler operation mode) valve (displays working

parameters of the valve)

valve 1 (displays working parameters of the first valve).

valve 2 (displays working parameters of the second valve).

NOTE The valve parameter views are available only if the valves have been properly preinstalled

and configured by a technician.

II.c) Preset temperature of the central heating system

The option is used to set the boiler temperature. The user can change the boiler temperature

within the range of 45OC to 80OC. The preset central heating system temperature can also be

changed directly in the main screen of the controller by turning the pulser knob.

Additionally, the preset central heating system temperature can be adjusted using the room

temperature reduction function (see Item II.15) and the weekly control function. The preset

temperature is a sum of all those values but it may not exceed the range of 45OC to 80OC.

EL480zPID

II.d) Preset temperature of hot domestic water

The option is used to set the temperature of hot domestic water. The temperature is adjustable

within the range between 40°C and 75°C.

II.e) Manual operation

For your convenience the controller is equipped with a Manual operation module. When this

function is active each actuator (blowing, central heating pump, hot water pump, additional

circulating or valve pump) can be switched on or off independently and each active mixing valve

can be closed, opened or stopped.

You can start the motor of your selected device by pressing the pulser. The device will remain

activated until the pulser is pressed again.

Additionally, an option to control the blowing power is available where you can set any

fan speed in manual mode.

II.f) Pump operation modes

This function allows you to select one of the following four boiler operation modes:

User manual

II.f.1) House heating

When you select this option the controller switches over to a mode where heating is provided

only to heat the central heating circuit. The central heating pump begins to run above the pump

activation temperature (factory set at 38OC - see Section III.g). The pump will turn off below

this temperature (minus a hysteresis of 2°C).

II.f.2) Boiler tank priority

In this mode, the boiler tank (hot water) pump will be switched on first to run until the set-

point temperature is reached (see Section II.e), after which the pump will be turned off and the

CH circulating pump will be enabled.

The central heating pump will run all the time until the boiler tank temperature drops below its

set-point by the hot water hysteresis value. At that moment the CH pump will turn off and the

HW pump will turn on (both pumps operating alternately).

In this mode the fan and the feeder are run only up to 62OC as measured at the boiler

(instantaneous set-point) so as to prevent overheating of the boiler.

NOTE: The boiler must be fitted with check valves on the central heating and hot water pump

circuits. The valve mounted on the hot water pump is to prevent drawing hot water from the

boiler tank.

II.f.3) Pumps in parallel

In this mode both pumps begin to run together (in parallel) above the pump activation

temperature. However, these temperatures may vary for each pump, depending on your

settings (see Sections III.g-h). When this is so one of the pumps will switch on earlier than the

other one, but after both thresholds are crossed both pumps will run together. The central

heating pump will run all the time while the hot water pump will turn off when the boiler tank

set-point temperature is reached. It will turn on again when the temperature drops by the

preset HW hysteresis value below its set-point.

EL480zPID

II.f.4) Summer mode

Once this function is activated the central heating pump will be off and the DHW pump will turn

on above the preset activation temperature (see Section III.h) and will work continuously until

the temperature drops below the activation temperature by the hot water hysteresis value or

until the following conditions are met:

(boiler temperature) + 2°C ≤ (boiler tank temperature)

In summer mode you only enter the set-point temperature of the boiler, which is also

understood to mean the set-point temperature of the boiler tank.

II.g) Weekly control

The function is used to programme daily changes in the boiler temperature. The preset

temperature deviations are within the range of +/-100C.

Step #1:

The user needs to set current time and date first (Installer menu > Clock).

Step #2:

The user sets temperature values for individual days of the week (Set mode 1):

Monday–Sunday

Select specific hours and required deviations from the preset temperature (how many degrees

the temperature should rise or drop) for each day of the week. Additionally, the preset values

can be copied to facilitate the operation.

Example

Monday

preset: 3 00 , temp. -10°C (temperature change– 10°C)

preset: 4 00 , temp. -10°C (temperature change – 10°C)

preset: 5 00 , temp. -10°C (temperature change – 10°C)

In such a case, if the temperature preset on the boiler is 60ºC, it will drop 10ºC to

50ºC between 3 a.m. and 6 a.m. on Monday.

As an alternative to the temperatures being preset separately for individual days, the

temperatures can also be set collectively, in the second mode, for the working days (from

Monday to Friday) and the weekend (Saturday and Sunday) separately - Set mode 2.

Monday - Friday; Saturday - Sunday

Similarly to the previous mode it is necessary to select specific times and required deviations

from the temperature preset for the working days (Monday - Friday) and the weekend

User manual

(Saturday, Sunday).

Example

Monday - Friday

preset: 3 00 , temp. -10°C (temperature change – 10°C)

preset: 4 00 , temp. -10°C (temperature change – 10°C)

preset: 5 00 , temp. -10°C (temperature change – 10°C)

Saturday - Sunday

preset: 16 00 , temp. 5°C (temperature change +5°C)

preset: 17 00 , temp. 5°C (temperature change +5°C)

preset: 18 00 , temp. 5°C (temperature change +5°C)

In this case, if the preset boiler temperature is 60ºC, the temperature will drop 10ºC to 50ºC

between 3 a.m. and 6 a.m. on each day from Monday to Friday. However, the temperature

will rise 5ºC to 65ºC during weekend (Saturday, Sunday) between 4 p.m. and 7 p.m.

Step #3:

The user enables one of two preset modes (Mode1, Mode2) or disables the weekly control

option.

Once the mode is enabled the value of the deviation currently set is displayed on the main

page of the controller next to the preset central heating system temperature. This,

additionally, indicates that the weekly control is active.

Data deletion function is a simple method to remove all previously saved weekly

programme settings to enter new settings.

II.i) Fuel selection

This function is used to choose one of two fuel: coal or lignite. For each fuel there is suitable

blow force and fuel feeding frequency programmed.

II.j) Room temperature reduction

After the room controller reaches the preset temperature, the preset boiler temperature

(set in the installer menu - see Item III.16) will drop by the value set there. The reduced

temperature will not be lower however than the minimum preset central heating temperature.

Example: Temperature preset on the boiler: 55ºC

Room temperature reduction: 15ºC

Minimum temperature set on the boiler: 45ºC (factory setting)

Once the preset room temperature is reached (signalled by the room controller) the

temperature preset on the boiler will drop to 45ºC i.e. only by 10ºC although the room

temperature reduction is 15ºC. At the same time a message reading "!-10º" will be shown in

the main display next to the preset boiler temperature.

II.k) Factory settings

The controller is pre-configured for operation. However, it should be adapted to individual

needs. Factory settings can be restored at any time. Selection of “factory settings” option will

result in all boiler settings (saved in user’s menu) being lost and reset to boiler manufacturer’s

settings. Individual boiler parameters can be set at that point again.

ATTENTION: Restoration of factory settings will not cause the changes in service settings to be

deleted.

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