TECH ST-280 User manual

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ST – 280 Instructions manual
Declaration of Conformity no. 56/2012
We, TECH Sp.j., with our registered company office at Wieprz
10 7A, 3 -122 Wieprz, Poland declare under our full responsibility
that the ST-280 230V 50Hz thermoregulator that we manufacture
meets the requirements of the Directive of the Minister of Economy,
Labour and Social Policy (Dz. U. /Journal of Laws/ No. 155 item
1089) of 21st August 2007 implementing the provisions of the Low
Voltage Directive (LVD) 2006/95/EC of 16th January 2007.
The ST-280 controller has passed electromagnetic
compati ility (EMC) tests with connections under optimal
loads.
To assess its conformity the harmonized PN-EN 60730-2-
9:2006 standards were used.
Paweł Jura, Janusz Master
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ST – 280 Instructions manual
I. Use
The ST-280 universal room thermostat is designed to control and
monitor room temperatures and temperatures in central heating and
hot water systems. Additionally, the device can run a weekly heating
program and be operated with four mixing valves (using ST-61 control
modules). The device features an alarm clock, many useful settings and
a parental lock to protect against unwanted changes to settings. By
using the thermostat you will be able to comfortably control the
temperature in your home (central heating system) and the
temperature of hot water directly from your flat/house without having
to walk down to the furnace room.
An easy to read large graphic display with a backlit touch screen
makes it easy to read and change thermostat parameters. Other
advantages of the thermostat include a design that makes it easy to
mount the device on the wall, attractive appearance and reasonable
pricing.
The ST-280 room thermostat works with TECH’s RS
communications type controllers.
II. Principle of operation
*View active only when connected to a mixing valve.
**View active only if the room thermostat receives this data from the furnace controller.
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The above screen view is the default view for the ST-280 controller
under its factory settings. You can change it to Panels screen:
The view can be changed with the and buttons in the
right or left parameters panel.
Irrespective of which screen view is set you can change temperature
set-points (by pressing the temperature on the screen that you wish to
change) without having to enter the controller menu.
Note: Any changes in temperature set-points, time or other
settings on the room thermostat or the furnace controller will cause
the new settings to appear on both devices.
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ST – 280 Instructions manual
Parameters panels:
View showing the current and set
temperature inside the room -
when you press this panel you can
change the room set temperature.
View showing the current and set
temperatures of the furnace -
when you press this panel you can
change the furnace set
temperature.
View showing the current and set
temperatures of the water heater -
when you press this panel you can
change the water heater set
temperature.
View showing the current and set
temperatures of valves 1, 2, 3 and
- when you press this panel you
can change valve set
temperatures.
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View showing the level of fuel in the
furnace (view active only when the
thermostat receives such information
from the furnace controller).
Graph showing the current temperatures
of the furnace, water heater or inside the
room. It provides graphic presentation of
temperature changes over time.
View that allows you to turn off and on
the furnace (view active only in the case
of a pellet furnace) - When you press this
panel you can turn on or off the furnace.
This option is not available if the daily
furnace operation mode is on and set to
periodic operation.
Operation mode view - shows the active
pump operation mode (view active only
when a pellet furnace is used) – by
pressing this panel you can change the
pump operation mode. You can select
any of the following pump operation
modes: home heating, water heater
priority, pumps in parallel, summer
mode with heating up and summer mode
without heating up. A detailed
description of the pump operation modes
can be found in the instructions manual
of the furnace controller.
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ST – 280 Instructions manual
II.a Thermostat menu
During normal operation of the thermostat the graphic display shows
the main page. After pressing the menu button the user can access the
individual functions of the controller. The and buttons are
used to navigate the main menu.
II. ) Description of controller functions
1. Time
After pressing the Time icon in the main menu a panel will be
displayed that can be used to change clock settings, the current day of
the week and alarm clock settings.
➢Clock settings:
You can use this function to set the
current time for the thermostat.
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➢Setting the current day of week:
You can use this function to set the
current day for the thermostat.
➢Setting the alarm clock:
You can use this function to enter settings for the alarm clock. You
can set the alarm clock to go off only on selected days of the week
(active on selected days) or set it to go off once.
Use the "up" and "down" arrow keys
to set your alarm time.
If the alarm is to be enabled only on
selected days of the week you need
to mark the days on which the alarm
is to go off.
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ST – 280 Instructions manual
Screen appearance of the
controller at the time of
activation of the the alarm.
2. Safety devices
After pressing the Security icon in the main menu a panel will be
displayed that can be used to change your parental lock settings.
➢When you press the Auto-lock icon a panel will be shown that can
be used to enable or disable the lock.
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➢To set your PIN code, which you will need to operate the
thermostat (when the lock is enabled), press the PIN icon.
Note: Your PIN is factory preset to "0000".
3. Screen
After pressing the Screen icon in the main menu a panel will be
displayed that can be used to change your screen settings.
➢Screen view - When you press the Screen view icon you can adjust
settings that will allow you to change the appearance of the main
screen. The default setting is the installation screen, but you can
also set it to show the panel screen.
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ST – 280 Instructions manual
➢At night
After pressing the At night icon a
panel will be shown for adjusting
the night time appearance of the
screen with the following options
available: As at daytime, Clock and
Off.
Nocturnal screensaver as a clock.
➢The rest of the screen menu can be used to set the times when the
controller is to switch into nighttime mode (Nighttime from) and
return to daytime mode (Daytime from). You can also adjust the
Daytime screen brightness and Nighttime screen brightness.
4. Weekly control - this feature allows you to change the room
temperature set within 2 hour day and night cycles.
For each day of the week daily temperature deviations can be
programmed with optimal values for the household members (deviation
from room temperature set-point). For each day of the week you can
enter any deviation with an accuracy of one hour from the main
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temperature set-point within a 2 hour day and night cycle.
First, select a day of the week on which hourly deviations are to be
set - to do so, press the Settings icon and then select the day of the
week for which you want to enter temperature settings.
After selecting the day of the week a panel will be displayed for
setting temperature deviations at selected time intervals.
To make these settings easier you can copy a set deviation value
for the next hours - just press the symbol on your selected value
and use the arrows to copy the selected setting onto the next hours.
Press the Copy icon to copy the settings of the whole day onto the next
days.
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ST – 280 Instructions manual
Weekly settings for set-point temperatures help reduce heating
costs and ensure that your desired thermal comfort conditions can be
maintained around the clock. The correct operation of this feature
requires the setting of the current time and day of the week.
5. Furnace control - this function is activated only when a pellet
furnace is used
➢ Set temperature - press this icon to change the value of your
required furnace temperature (you can also do this by clicking on
the parameters view from the start screen).
➢Lighting up – press this icon to start the process of firing up the
furnace.
➢xtinguishing – press this icon to start the process of shutting off
the furnace.
➢Operation mode - press this icon to easily change the pumps
operations mode (in furnace controller) with the following options
available: Home heating, furnace priority, Pumps in parallel and
Summer mode. A detailed description of the operation modes can
be found in the instructions manual of the furnace controller.
➢Daily furnace operation - press this icon to set a daily schedule for
the furnace:
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◦Temporary operation - select this icon to run the furnace at
scheduled times
◦Continuous operation - select this icon to run the furnace in
continuous mode
◦Settings - press this icon to program the operation of the furnace
in details:
▪Mode selection.
▪After selecting the Only working hours option the furnace will be
switched on and off as scheduled by you.
If you select the Hours operation and temperature in room mode the
furnace will be turned on depending on the actual temperature inside
the room and as per the daily operation schedule of the furnace. The
existing temperature inside the room will be prioritized under this mode
- if the room temperature drops below a temperature threshold value
(specified by the user) the furnace will be turned on even if the
operation schedule specifies otherwise.
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ST – 280 Instructions manual
▪Working hours
Press this icon to set at what times the furnace is to be on and when it
is to be off (time intervals set as multiples of 30 minutes)
▪Temp. in room enabled
After pressing this icon a panel will be displayed where you can set a
threshold temperature for the room - if the temperature in the room
drops below this set-point value the furnace will be turned on
irrespective of your time schedule settings.
▪Temp in room disabled
After pressing this icon a panel will be displayed where you can set a
threshold temperature for the room - if the temperature in the room
rises above this set-point value the furnace will be turned off
irrespective of your time schedule settings.
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6. Language selection press the Language selection icon in the
main menu to access the user language selection panel
7. About the program press this icon to display the logo of the
furnace manufacturer and the version of the software.
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ST – 280 Instructions manual
8. Settings – press this icon to change additional parameters.
➢Sensor – after pressing this icon a panel will be displayed that
allows you to change the hysteresis and calibration settings of the
temperature sensor of the room thermostat.
Sensor calibration. The sensor is calibrated during installation or
after prolonged use of the thermostat, if the room temperature as
measured by the internal sensor deviates from the actual one.
Adjustment range: between -10 and +10 OC with an accuracy of
0.1OC.
The item room temperature hysteresis allows for a tolerance for
pre-set temperatures to be introduced to prevent unwanted
oscillations in the event of minimal temperature fluctuations
(between 0.2 and °C) with an accuracy of 0.1°C.
For example, when your temperature set-point is 23°C and the
hysteresis value is set to 1°C the room thermostat will start to
indicate room underheating after the temperature in the room
drops to 22°C.
➢furnace type - press this icon to select the type of furnace installed.
The available options are standard or pellet.
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III. Alarms
The ST-280 room temperature thermostat will indicate all alarms
going off in the main controller of the central heating furnace. When an
alarm is activated the room thermostat will sound a beep and the
display will show the same message as that on the furnace controller. If
the internal sensor suffers damage an alarm will be displayed saying
”Room temperature sensor demaged”.
Technical specifications
Setting range for room temperature 5oC - 40oC
Power supply voltage 5V / DC
Power consumption 1. W
Room temperature measurement error +/- 0.1OC
Operating temperature 5oC - 50oC
VI. Assembly
The ST-280 room thermostat is connected to the host controller
(mounted on the CH furnace) with a four-wire communication cable and
the room thermostat power supply unit. The cable connections of both
devices are shown in the diagram below.
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ST – 280 Instructions manual
Room thermostat
terminal block
Sequence of wires
for connecting room unit:
WH - white
BR – brown
GR – green
YE – yellow
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