steering st-480
ST – 480
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.
-2-
ST – 480
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.
-3-
ST – 480
I. Description
ST–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.
I.1. 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
-5-
ST – 480
"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.
I.2. 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 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.
I.3. 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).
➔
-6-
ST – 480
➔ 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.1.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 (see Item II.6). The preset temperature
is a sum of all those values but it may not exceed the range of 45OC to
80OC.
II.2. 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.3. 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.
-7-
ST – 480
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.4. Weekly control
The function is used to programme daily changes in the
temperature. The preset temperature deviations are within the range of
+/-100C.
boiler
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.
-8-
ST – 480
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
Similarly
required
(Monday
- Friday; Saturday - Sunday
to the previous mode it is necessary to select specific times and
deviations from the temperature preset for the working days
- Friday) and the weekend (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.5.Feeding time
This option is used to set the fuel feeder operation time. The time should
be set according to the fuel being used and the boiler type.
II.6. Feeding pause
Feeding pause time is used to set the pause time in feeder operation. The
-9-
ST – 480
pause length should be adapted to the fuel type combusted in the boiler. Wrong
selection of operation and/or pause times may result in boiler malfunctioning
i.e. the fuel may be not fully combusted or the boiler may not reach the preset
temperature. Selection of appropriate times will ensure proper operation of the
boiler
II.7. Temperature alarm
The function is activated in the operation mode only (i.e. when the boiler
temperature is lower than the preset temperature). If the temperature is not
rising for a period defined by the user in that function an alarm is activated: the
feeder and the blower are turned off (the pump is turned on and off
independently) and sound is produced. A message reading “Central heating
system temperature is not rising” appears on the display. The alarm is cancelled
by pressing the pulser knob.
II.8. Blowing rate
The function controls the fan operating speed. The adjustment range is
between 1 and 100% (equivalent to fan speeds). The higher the speed is, the
faster the fan operates where 1% stands for the minimum fan speed and 100%
is the maximum speed.
II.9. Pump operation modes
This function allows you to select one of the following four boiler operation
modes:
II.9.a) 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 38 OC
- 10 -
ST – 480
- see Section III.g). The pump will turn off below this temperature (minus a
hysteresis of 2°C).
II.9.b) 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 62 OC 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.9.c) 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.
- 11 -
ST – 480
II.9.d) 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.10. Sustained operation
This option is used to set simultaneously the feeder and blower
operating time while the boiler is in the sustain mode.
II.11. Sustain pause
The sustain pause function is used to set the break time in fuel
feeding in the sustain mode. Inappropriate selection of working and
pause times may result in further temperature rise or unintended boiler
shutdown or even lead to conditions where the fuel in the fuel tank gets
fired.
II.12. Fan in sustain mode
The option allows selection of appropriate working and pause times
during the fan operation in sustain mode.
II.15. 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
- 12 -
ST – 480
time a message reading "!-10º" will be shown in the main display next to
the preset boiler temperature.
II.16 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.
II.17 Information about the programme
This function allows the user to check the controller programme
version.
III.
Installation menu
The functions of the installation menu should be set by the person
installing the boiler or service personnel of the manufacturer.+
III.a Main valve
- 13 -
ST – 480
III.a.1 Switch on
This feature allows you to temporarily make the valve inactive.
III.a.2) Set-point valve temperature
This setting is used to set the circuit temperature to be maintained by the
mixing valve. This is the main temperature based on which the room
thermostat reduction function is to be run (see Section III.a.10). The room
thermostat reduction function is set separately for the CH system (setting in the
user menu) and separately for each of the valves.
III.a.3) Temperature control
This parameter determines the sampling (control) frequency of the water
temperature downstream of the valve for the central heating or hot water
system. If the sensor indicates a change in temperature (deviation from setpoint), then the solenoid will open or close partially by a preset step to restore
the set-point temperature.
III.a.4) Opening time
You can use this function to set the time for the full opening of the valve,
that is to say, how long it takes to open the valve to 100%. This time should be
selected according to your valve actuator (shown on the nameplate).
- 14 -
ST – 480
III.a.5) Single step
You can use this function to set a percentage value for a single step in the
operation of valve opening, that is to say the maximum percentage value of
opening or closing that the valve can move in a single step (maximum
movement of the valve in one measurement cycle).
III.a.6) Minimum opening
Use this function to set the minimum value for valve opening. Below this
value, the valve will not close shut.
III.a.7) Type of valve
You can use this option to select the type of valve: central heating
or floor type.
III.a.8) Weather program (weekly valve program)
In order to enable the weather function an outdoor sensor should be
installed in a place not exposed directly to sunlight or weather conditions.
After installing and connecting the sensor the Weather program function must
be enabled in the controller menu.
For the valve to work properly enter set-point temperatures (downstream
of the valve) for the following four intermediate outside temperatures:
TEMP. FOR -20
TEMP. FOR -10
TEMP. FOR 0
TEMP. FOR 10
Heating curve - curve which is used to determine the set-point temperature of
- 15 -
ST – 480
the controller based on the outside temperature. In our controller this curve is
established based on four temperature set-points selected for their respective
outside temperatures. Set-point temperatures must be provided for the
following outside temperatures: -20ºC, -10ºC, 0ºC and 10ºC.
The more points there are available for constructing the curve, the greater
is its accuracy, which allows you to determine its shape in a flexible way. In our
case, four points seem to be a very good compromise between accuracy and
ease of setting its shape.
Where in our controller:
XA = -20ºC,
XC = 0ºC,
XB = -10ºC,
XD = 10ºC,
YA, YB, YC, YD – set-point valve temperatures for their corresponding outside
temperatures: XA, XB, XC, XD
After weather control is enabled the valve set-point parameter is
calculated based on the heating curve. By changing this parameter you can
decrease or increase all the weather control settings.
III.a.9) Return protection
This feature allows you to enable protection for the boiler from excessively cold
water returning from the main circuit, which could cause the boiler to suffer
from low-temperature corrosion. The return protection function works to ensure
that when the temperature is too low the valve will close partially until the short
circuit of the boiler reaches the desired temperature. This feature also protects
the boiler from a dangerously high return temperature to prevent water from
boiling.
When this function is enabled you need to set the minimum and maximum
return temperatures.
III.a.10) Room thermostat reduction
This function is active only when the unit is operated with a (standard or
- 16 -
ST – 480
TECH) room thermostat. When the room thermostat reaches the desired
temperature in the house/flat (reports heated up condition), the valve will close
to such an extent so that the temperature downstream of the valve drops by
the <room thermostat reduction> temperature.
NOTE: If the installation includes a TECH room thermostat with RS
communication (four-wire cable), you may choose an option providing dynamic
control for the mixing valve (see Section III.a.11)
III.a.11) Operation of TECH thermostat
This setting is active only if the controller is connected with a TECH room
thermostat (with RS communication) and allows a choice in how the thermostat
is to work together with the mixing valve:

temperature reduction – when you select this mode after heating up
the house/flat to your required temperature set-point temperature the TECH
room thermostat will lower the set-point temperature of the valve by the preset room thermostat reduction value (see Section II.a.10);

dynamic changes - when you select this mode after heating up the
house/flat to the set-point temperature the TECH room thermostat will work as
per the following settings:

Change in valve set-point. This setting determines by how many
degrees the valve temperature is to increase or decrease with a single unit
change in room temperature. This function is closely related to the Room
temperature difference parameter.

Room temperature difference. This setting is used to define the single
unit change in the current room temperature (accurate to 0.1°C) at which there
is to occur a specific change in the set-point temperature of the valve.
Example:
setting: Room temperature difference 0.5ºC
setting: Change in set-point valve temperature 1ºC
setting: Set-point valve temperature 40ºC
setting: Set-point room thermostat temperature 23ºC
Case 1. If the room temperature rises to 23.5ºC (by 0.5ºC) the valve will close
to such an extent as to have 39ºC as a set-point (by 1ºC).
Case 2. If the room temperature drops to 22ºC (by 1ºC) the valve will open to
such an extent as to have 42ºC as a set-point (by 2ºC).
- 17 -
ST – 480
III.a.12) Factory settings
This parameter allows you to restore the mixing valve settings saved by
the manufacturer. By restoring the factory settings you will not change the
valve type setting (central heating or floor type).
III.b) Valve 1
NOTE: Control with an additional valve (1 or 2) is only possible after you
purchase and connect the controller to an additional control module (ST-61),
which is not provided as standard equipment with the controller. In order to
control two valves you need to connect two ST-61 modules.
The options presented in this chapter are used to adjust the operating
settings of an additional mixing valve. In order for the valve to work properly
and meet your expectations it should be configured with its parameters set like
in the case of the main valve.
- 18 -
ST – 480
III.b.1)Registration.
To register an additional valve enter the serial number of the control module of
the ST-61 mixing valve servo (look for the five-digit number on the cover of
this module). Without this number the valve cannot be activated.
III.b.2) Switch on (setting as for the main valve - see Section
III.a.1).
III.b.3) Set-point valve temperature (setting as for the main valve
– see Section III.a.2)
III.b.4)Room thermostat
If the valve is to be operated with a room thermostat, you should
select its type:
 module controller (traditional two-state type – “from the module”),
 standard or TECH controller (traditional two-state type – “from the
controller”),
 TECH algorithm controller (RS communication),

room temperature difference (setting as for the main valve – see
Section III.a.11),

set-point change (setting as for the main valve – see Section III.a.11).
III.b.5) Temperature control (Setting as for the main valve – see
Section III.a.3).
III.b.6) Opening time (Setting as for the main valve – see Section
III.a.4)
III.b.7) Single step (Setting as for the main valve – see Section III.a.5).
III.b.8) Minimum opening (Setting as for the main valve – see Section
III.a.6).
III.b.9) Type of valve (Setting as for the main valve – see Section
- 19 -
ST – 480
III.a.7).
III.b.10) Weather program (weather control) (Setting as for the
main valve – see Section III.a.8).
III.b.11) Return protection - (Setting as for the main valve – see
Section III.a.9).
III.b.12) Additional sensors
When two mixing valves are used and you select this function you will be
able to select the sensors from which temperature data are to be retrieved for a
valve (for return and outside temperature sensors). Temperatures can be
retrieved from the sensors of the valve being set (Own) or as per the controller
sensors (Main controller).
III.b.13) Room thermostat reduction (Setting as for the main
valve – see Section III.a.10).
III.b.14) External sensor adjustment
The external sensor is to be adjusted during installation or after prolonged
use of the thermostat if the outside temperature displayed deviates from the
actual one. Adjustment range: -10 to +10 OC with an accuracy of 1OC
III.b.15) Factory settings (Settings as for the main valve – see Section
III.a.12)
III.b.16) Valve removal
This function is used to completely remove a valve from the controller
memory. Valve removal is used for example when removing or replacing a
module (the new module requires to be registered again).
- 20 -
ST – 480
III.b.17) About the program
When this option is selected the display will show the software version of
the active valve module.
III.c)Valve 2
All settings for valve 2 are made in the same way as in the case of valve 1.
III.1. Pump activation temperature
The option is used to set the activation temperature for central heating and
domestic hot water pumps (the temperature is measured on the boiler). None
of the pumps will operate if the temperature is lower than the preset one. If the
actual temperature is higher than the preset one the pumps are working but
they operate depending on the operation mode (see: pump operation modes)
III.2. Boiler hysteresis
This option is used to set the hysteresis of the set temperature. This
is a difference between the temperature of entering the support cycle,
and the temperature of return to the operation cycle (for example: when
the set temperature has the value of 60ºC, and the hysteresis is 3ºC,
switching into the support cycle will proceed when the temperature
increases to 60ºC, while return to the operation cycle will proceed when
the temperature decreases to 57ºC).
III.3. HUW hysteresis
This option is used to set the hysteresis of the set temperature in the
- 21 -
ST – 480
reboiler. It is the maximum difference between the set temperature (that
is required in the reboiler) and the current temperature in the reboiler at
which the HUW pump will activate. (for example: when the set
temperature has the value of 55o C and the hysteresis is 5o C. After
reaching the set temperature, that is 55 o C, the HUW shuts down
and
causes activation of the CH pump. Re-activation of the HUW pump will
proceed when the temperature decreases to 50o C).
III.4. TECH controller
A room controller can be connected to ST-480 controller. This
function allows to configure the controller by selecting “ON” option.
Additionally, the user may check the programme version of the room
controller.
After connection of TECH controller the user may check and change
the preset temperature of the central heating system, hot domestic water
and the mixing valve. Additionally all boiler controller alarms are
displayed. When the operation involves the mixing valve the user may
preview the current external temperature while viewing the main screen
with the valve parameters .
After TECH Controller option is enabled a letter "P" appears in the
upper part of the display in the main screen of the controller. A flashing
letter "P" indicates that the temperature in the room is too low. As soon
as the required room temperature is reached the letter "P" stops flashing
and stays on.
ATTENTION: No external voltage can be connected to the room controller
output.
III.5.
GSM module
NOTE: Controlling of this type is possible after purchasing and connecting, to
the controller, the additional control module ST-65 which is not attached to the
regulator as a standard feature.
The GSM module is an optional device cooperating with the boiler
controller, enabling remote control of the boiler operation with the use of a
mobile phone. The User is notified with a text message on each alert of the
boiler controller, and by sending an appropriate text message at any time, he or
she receives a return message with the information on the current temperature
- 22 -
ST – 480
of all sensors. After entering an authentication code it is also possible to
remotely change the set temperatures.
The GSM module can also operate independently from the boiler
controller. It has two inputs with temperature sensors, single contact input for
use in any configuration (detecting short circuit/opening of contacts) and one
controlled output (e.g. possibility to connect additional contactor to control any
electrical circuit).
When any temperature sensor reaches the preset deactivation
temperature, maximum or minimum, the module will automatically send a text
message with such information. It is similar in the case of a short-circuit or
opening of contact input, which may be used e.g. for simple protection of
property.
III.6.
Internet module
NOTE: Controlling of this type is possible after purchasing and connecting, to
the controller, the additional control module ST-500 which is not attached to
the regulator as a standard feature.
The Internet module is a device enabling remote control of the boiler over
the Internet or local network . On the home computer screen the user controls
the condition of all boiler system devices and the operation of each device is
presented in the animated form.
Apart from the possibility to view the temperature of every sensor, the
user has the possibility of introducing changes of the set temperatures for both
the pumps and the mixing valves.
After activating the Internet module and selecting the DHCP option, the
controller will automatically download such parameters from the local network
as: IP address, IP Mask, Gateway address and DNS Address. In the case of any
problems with downloading network parameters of the existing network, there
is a possibility of setting these parameters manually. The method of obtaining
local network parameters has been described in the instructions for the
Internet module.
The function Reset module password may be used when the User, on the
login page, has changed the factory user's password to his or her password.
When a new password is lost, it is possible to return to the factory password
after resetting the module password.
III.7. Feeder in auto mode
The option allows enabling and disabling the automatic operation of
the feeder. The feeder can be disabled to feed fuel manually or to shut
the boiler down.
- 23 -
ST – 480
III.8. Blowing in auto mode
Automatic operation of the fan can be enabled or disabled using this
function. Blowing can be disabled to manually control the natural chimney
draught.
III.9. Floor pump
The function is used to control the floor heating. The user sets the floor
heating temperature in the range between 30ºC to 55ºC. After activation of the
floor pump the minimum (threshold) temperature (measured on the boiler) and
the maximum (preset) temperature of the floor heating (measured on the pump
sensor) should be set. The floor pump is not operating below the minimum
temperature. It turns on after the minimum temperature is exceeded until the
preset maximum temperature is reached.
Once the preset temperature is reached the pump turns off and it is restarted
if the temperature drops 2ºC below the pre-set value.
III.10. Circulation pump
The function allows to control the pump which is used to mix hot
water between the boiler and the domestic hot water taps. After the
function is activated the user sets the 24h activation cycle or pause cycle
accurate to 30 minutes.
To facilitate the 24h operation and pause cycle setting it is possible
to copy the selected time interval to another interval.
After the operation schedule has been set it is necessary to set the
working and pause times for the pump while the previously selected time
period is active. If necessary the previous settings can be easily deleted
to facilitate setting of new intervals.
III.11. Clock
You can use the clock settings to enter the current time and day of
the week.
III.12. Set the date
The function is used to set current date (day and month).
III.13. Pulser sensitivity
With this setting you can change the sensitivity of the pulser knob within a
range from 1 to 3 (where 1 means the highest sensitivity).
- 24 -
ST – 480
III.14. Language selection
Using this function, the user selects the language in which the
controller will be operated.
III.16
Room controller unit
This function allows to programme the operation of the room
controller as follows:
 Off – the state of the room controller has no impact on other
settings
 Boiler – after the room controller has indicated that the preset
temperature is reached the preset boiler temperature will be
reduced (detailed setting - see Item II.15)
 Central Heating pump - after the room controller has indicated that
the preset temperature is reached the central heating pump will be
shut off (detailed setting - see Item II.15)
 Room controller – the function allows to select the controller type
connected to ST-480 controller to operate with the above selected
unit. Two options are available:
 two-state (standard controller)
 TECH controller
After TECH Controller option is enabled a letter "P" appears in the
upper part of the display in the main screen of the controller. A flashing
letter "P" indicates that the temperature in the room is too low. As soon
as the required room temperature is reached the letter "P" stops flashing
and stays on
If both controllers are selected the room control temperature
reduction will be active only after both controllers have sent a signal
confirming that the preset room temperature has been reached.
III.17
Display contrast
Allows changing the display contrast settings.
IV. Service menu
A 4-digit code has to be input to enter service functions of ST-480
controller. The code is in possession of Tech Company.
- 25 -
ST – 480
V. Protections
To ensure maximally safe and unfailing operation, the regulator has a
number of protections. In the case of an alarm, a sound signal is activated and
an appropriate message is shown on the display.
To make the controller return to operation, press the pulse generator.
V.1. Temperature alarm
This protection is activated only in the operation mode (that is when the
boiler temperature is lower than the set temperature). If the boiler temperature
does not increase throughout the period set by the user, the alarm is activated,
the feeder and the blow-in are deactivated (the water pump is turned on
regardless of the boiler temperature) and a sound signal is activated. An
appropriate message will be shown on the display.
The alarm will be disabled after pressing the knob of the pulse
generator. The regulator returns to the recently set operation mode.
V.2. Thermal protection
It is an additional bimetallic mini-sensor (located at the boiler temperature
sensor), disconnecting the fan and the feeder in the event of exceeding the
alarm temperature: 85O C. Its activation prevents the water in the installation
from boiling , in the event when the boiler overheats or the controller is
damaged. After activation of this protection, when the temperature goes down
to a safe value, the sensor will unlock automatically and the alarm will be
deactivated. In the case of damage or overheating of this sensor, the fan the
and feeder will be disconnected.
V.3. Automatic sensor control
In the event of damage of each of the sensors the sound alarm is
activated, additionally signalling , the defect on the relevant display, e.g.: "CH
sensor damaged". The feeder and the blow-in is disabled. The pumps operate
according to the set temperatures, regardless of alarms.
In the case of damage of the CH sensor or the feeder, the alarm will be active
until the sensor is replaced with a new one. If the HUW sensor is damaged, one
should press the menu button, which will turn off the alarm and the controller
will return to the one pump (CH) operation mode. In order to ensure that the
boiler will be able to work in all modes, the sensor must be replaced with a new
one.
- 26 -
ST – 480
V.4. Protection against boiling of water in the boiler
This protection is applies only to reboiler priority operation mode. When the
set reboiler temperature is e.g. . 55 O C and the actual temperature in the boiler
increases up to 62O C (this is the so-called the priority temperature), then the
controller will turn off and the feeder the fan. If the temperature in the boiler
still increases up to 80O C, the CH pump will be activated. When the
temperature still increases, then the alarm will be activate at the temperature
of 85O C. Most often such a condition may appear when the reboiler is
damaged, the sensor is improperly fitted or the pump is damaged. However,
when the temperature drops, then at the threshold of 60 O C the controller will
turn on the feeder and the blow-in and will run in the operating mode until the
temperature of 62O C is reached.
V.5. Temperature protection
The regulator has an additional protection in the event of damage of the
bimetallic sensor. After exceeding the temperature of 85ºC, the alarm is
activated, signalling the following on the display: "Temperature too high".
Despite damage of the bimetallic sensor, the controller receives information on
the current temperature in the boiler from the electronic sensor. In the case of
exceeding the alarm temperature, the fan is turned off and, at the same time,
both pumps begin to operate in order to distribute hot water across the house
installation.
V.6. Fuel container protection
On the fuel feeder there is an additional temperature measuring sensor.
In the event of its significant increase (above 70O C), the alarm is activated;
the feeder is activated every 10 minutes, which causes pushing the fuel to the
combustion chamber. This way the feeder sensor protects against fuel ignition
in the container.
V.7. Fuse
The regulator has a WT 6.3A tubular fuse insert, protecting the network.
Using a fuse with a higher value can cause damage to the existing controller.
ATTENTION: The fuse of higher value should not be used. Assembling the
fuse with a higher value may cause damage to the controller.
VI.
Maintenance
The ST-480 controller must be checked for the technical condition of its wires
before and during the heating season. You should also check the mounting of
the controller, clean it of dust and other contamination. Furthermore, you
should also measure the effectiveness of the grounding of the motors (central
- 27 -
ST – 480
heating pump, hot water pump and blower).
Item Specification
Unit
1
Power supply
V
230V/50Hz +/-10%
2
Maximum power consumption
W
11
3
Ambient temperature
O
4
C
5÷50
Load on output of central heating pump;
domestic hot water pump, floor pump;
circulation pump; valve
A
0,5
5
Load on blower output
A
0,6
6
Load on fuel feeder output
A
2
7
Temperature measurement range
O
C
0÷90
8
Measurement accuracy
O
C
1
9
Temperature setting range
O
C
45÷80
10
Thermal resistance of the sensor
O
C
-25÷90
11
Fuse cartridge
A
6,3
VII.
Assembly
NOTE: Installation should be performed by a properly qualified
technician! Do not install the unit with the power on (make sure that the
plug is disconnected from the mains)!
NOTE: Incorrect wiring may damage the controller!
VII.1. Controller wiring connection diagram
Particular attention should be paid when making cable connections with the
controller. Especially, the grounding conductor should be connected properly
- 28 -
ST – 480
* Pictorial diagram – it cannot replace CH installation project. Its aim is to present how the
controller may be expanded.
This heating installation diagram does not include protective elements which are necessary to
ensure correct installation
- 29 -
ST – 480
Table of contents
I. Description.................................................................................. 5
II. Functions of the controller.............................................................7
II.1.Preset temperature of the central heating system .......................8
II.2. Preset temperature of hot domestic water ................................8
II.3. Manual operation...................................................................9
II.4. Weekly control ......................................................................9
II.5.Feeding time ........................................................................ 11
II.6. Feeding pause......................................................................11
II.7. Temperature alarm...............................................................11
II.8. Blowing rate........................................................................ 11
II.9. Pump operation modes..........................................................12
II.9.a) House heating................................................................13
II.9.b) Boiler tank priority.........................................................13
II.9.c) Pumps in parallel............................................................13
II.9.d) Summer mode...............................................................14
II.10. Sustained operation............................................................14
II.11. Sustain pause.................................................................... 14
II.12. Fan in sustain mode............................................................15
II.16 Factory settings...................................................................15
II.17 Information about the programme.........................................16
III. Installation menu......................................................................16
III.a.1 Switch on............................................................................ 17
III.a.2) Set-point valve temperature.................................................17
III.a.3) Temperature control............................................................17
III.a.4) Opening time......................................................................17
III.a.5) Single step......................................................................... 18
III.a.6) Minimum opening................................................................18
III.a.7) Type of valve......................................................................18
III.a.8) Weather program (weekly valve program)..............................18
III.a.9) Return protection................................................................19
III.a.10) Room thermostat reduction................................................20
III.a.11) Operation of TECH thermostat.............................................20
III.b) Valve 1........................................................................... 21
III.c)Valve 2.................................................................................. 24
III.1. Pump activation temperature................................................24
III.2. Boiler hysteresis.................................................................24
III.3. HUW hysteresis...................................................................24
III.4. TECH controller...................................................................25
III.5. GSM module....................................................................... 25
III.6. Internet module..................................................................25
III.7. Feeder in auto mode............................................................25
- 30 -
ST – 480
III.8. Blowing in auto mode..........................................................25
III.9. Floor pump........................................................................ 25
III.10. Circulation pump...............................................................26
III.11. Clock............................................................................... 26
III.12. Set the date.....................................................................26
III.13. Pulser sensitivity...............................................................26
III.14. Language selection............................................................26
IV. Service menu...........................................................................26
V. Protections................................................................................ 26
V.1. Temperature alarm...............................................................26
V.2. Thermal protection...............................................................26
V.3. Automatic sensor control.......................................................27
V.4. Protection against boiling of water in the boiler........................27
V.5. Temperature protection.........................................................27
V.6. Fuel container protection.......................................................27
V.7. Fuse.................................................................................. 28
VI. Maintenance......................................................................... 28
VII. Assembly............................................................................... 28
- 31 -
ST – 480
- 32 -
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising