Quantrax COMPUTHERM Q8RF Manual de usuario
COMPUTHERM
Q8RF (TX)
Wireless (radio frequency) programmable
digital room thermostat (without receiver)
Operating Instructions
You can watch the most important aspects of the usage of this thermostat
on our video presentation at www.computherm.info
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GENERAL DESCRIPTION OF THE THERMOSTAT
The
COMPUTHERM
Q8RF (TX) type switched-mode room thermostat is suitable to
regulate the overwhelming majority of boilers and air conditioners. It can be used together
with the
COMPUTHERM
Q5RF and Q8RF multi-zone thermostats to complement the two
thermostats in the basic package, to increase the number of zones regulated and to
control the
COMPUTHERM
Q1RX wireless (radio-frequency) thermostat-controlled socket.
You can nd detailed information and recommended usage of the
COMPUTHERM
Q1RX socket and
COMPUTHERM
Q5RF and Q8RF multizone thermostats on our
website: www.computherm.info.
Because there is a wireless (radio-frequency) connection between the
COMPUTHERM
Q8RF (TX) thermostat and the receiver unit of the
COMPUTHERM
Q5RF/Q8RF thermostat
and/or the
COMPUTHERM
Q1RX socket, no cable is required between the thermostat and
the receiver and/or the socket.
The device can be programmed according to customer-specic requirements so that
the heating/cooling system heats/cools your residence or oce to the required temperature
at the times specied by the customer, to reduce energy costs while maintaining comfort.
Separate temperature programs can be prepared for each day of the week. For each
day, beside 1 xed switching time (PROG ), 6 adjustable switching times (PROG ‒
PROG ) can be set (at 10-minute intervals) and dierent temperature (in 0.5 °C
increments) can be assigned to all switching times.
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To increase the lifetime of the batteries, the thermostat will not transmit signals continuously.
Instead it will repeatedly transmit the actual signal every 8 minutes. Therefore, the
regulation of the heating or cooling will continue even after a blackout.
The portability of the thermostat oers the following advantages:
• no need to lay a cable, which is especially advantageous when old buildings are being
modernized,
• the optimal location of the device can be selected during operation.
Thermostat
Boiler
Reciever
230 V AC, 50 Hz
Zone valves 230 V AC, 50 Hz
- 4 -
The eective range of the transmitter incorporated in the thermostat is approximately
50 m in open terrain. This distance may become considerably shorter within a building,
especially when a metal structure, reinforced concrete or adobe wall stands in the way of
radio waves.
The information shown on the liquid crystal display of the thermostat includes
the following:
The days of the week
Manual control
indicator
Current temperature
of the room
Set temperature
Low battery voltage
Sign of the boiler/air
conditioner
working
Time
Program number
Temperature
modication until
the next manual
interference
Timed manual control
indication
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1. LOCATION OF THE DEVICE
The thermostats of the
COMPUTHERM
Q8RF (TX)
multi-zone programmable wireless type
device can be freely moved in your residence. It is reasonable to locate them in rooms used
regularly or for many hours per day so that they are in the direction of natural ventilation in the
room but protected from drought or extreme heat (e.g. direct sunlight, refrigerator, chimney,
etc). Do not use in wet, chemically aggressive or dusty environment. Their optimal location is
0.75 - 1.5 m above oor level. They can be placed on their own stand or can be mounted
on a wall.
IMPORTANT WARNING! If the radiator valves in your at are equipped with a thermostatic
head, adjust it to maximum temperature or replace the thermostatic head of the radiator
valve with a manual control knob in the room where the room thermostat is to be located,
otherwise the thermostatic head may disturb the temperature control of the at.
2. PUTTING THE THERMOSTAT INTO OPERATION, BASIC
SETTINGS
Warning! The device must be installed and connected by a qualied professional.
2.1 Inserting batteries
Pressing the lock on the upper side of the housing of the thermostat, remove the back
cover of the thermostat as shown in the gure below.
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The battery compartment is in the inner side of the front panel of the housing. Insert 2 AA
alkaline batteries (LR6 type) in accordance with the diagram in the battery compartment.
Warning! Good quality alkaline batteries may only be
used for this appliance. Carbon-zinc batteries known as
durable or long life batteries and chargeable accumulators
are not suitable for the operation of this appliance. Icon
appearing on the display to indicate low battery voltage
warns reliably that the batteries should be replaced only
when good quality alkaline are used.
After the batteries have been inserted, the display ashes the day, time and program
number as well as the adjusted and measured temperatures. (If this information fails
to appear on the display, press the “RESET” button located on the main panel of the
thermostat. After the batteries have been inserted, snap the front panel of the device into
the rear panel and press the “SET” button. After the “SET” button is pressed, the display
stops ashing, the thermostat goes to the main screen and the setting process can be
started.
2.2 Setting the current day and time
Press the “SET” button to go to the main screen, then press the “DAY” button. At this time
only the 1st three letters of the current day will ash on the display of the thermostat and
the hour and minute values can be seen.
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Using the large and buttons on the front panel of the device, set the the cur-
rent day (Monday MON; Tuesday TUE; Wednesday WED, etc.). Press the “DAY” button
again. At this time the contraction indicating the day stops ashing and becomes visible
continuously while the abbreviation indicating the hour will ash on the display. Using
the large and buttons on the front panel of the device, set the hour value
of the current time. Press the “DAY” button again. At this time the numbers that indicate
the hour stop ashing and become visible continuously, while the numbers indicating the
minute will begin ashing. Using the large and buttons on the front panel of
the device, set the minute value of the current time.
When you wish to continue modifying the settings, please press the “DAY” button again.
If you wish to nish settings, conrm them by pressing the “SET” button. At this point
adjusted data are recorded and the device goes back to the main screen (if no buttons
are pressed for at least 15 seconds, the settings are automatically conrmed and the
device goes back to the main screen).
2.3 Switching between the heating and cooling mode
There is a possibility to easily switch between the heating and cooling mode of the
thermostat. The output terminals of the receiver unit NO - COM and the zone outputs are
turned on below the set temperature in heating mode and above the set temperature in
cooling mode. (Taking the switching sensitivity into account).
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To switch between the two modes, 1st press the “SET” button to go to the main screen.
Then press the “SET” button again and hold it down and press the “COPY” button, too.
After this, the notice “ ” or “ ” appears in place of the time characters, according to
the selected mode. Following this, switch between the modes using the large and
buttons, then conrm it by pressing the “SET” button (if no buttons are pressed for
at least 15 seconds, the setting is automatically conrmed). After this conrmation, the
device goes back to the main screen.
2.4 Setting the switching sensitivity (accuracy)
There is a possibility to change the switching sensitivity. The switching sensitivity means
the temperature dierence between the adjusted value and the actual temperature
measured during the switching process.
A smaller switching sensitivity results in steadier room temperature and therefore in higher
comfort. The heat loss of the room (building) does not depend on the switching sensitivity.
If higher comfort is needed, the switching sensitivity should be set so that it provides a
steadier room temperature. On the other hand, please also take into account that the
boiler should not switch on and o multiple times in an hour's time except at low outside
temperatures (e.g. -10 °C), since the frequent on and o switches of the boiler reduce its
eciency and hence increases the gas consumption. We recommend using the ±0.1 °C
switching sensitivity for heating systems with high thermal inertia (e.g. underoor heating),
the ±0.2 °C (factory default setting) and ±0.3 °C switching sensitivity for heating systems
with low thermal inertia (e.g. at panel radiators).
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To change the switching sensitivity, 1st press the “SET” button to go to the main screen.
Then press the “DAY” and “COPY” buttons one after the other. Following this, select
the desired switching sensitivity using the large and buttons. The notices
“ ”, “ ” and “ ” indicate ±0.1 °C, ±0.2 °C and ±0.3 °C, respectively. Finally, conrm
the setting by pressing the “SET” button (if no buttons are pressed for at least 15 seconds,
the setting is automatically conrmed). After this conrmation, the device goes back to the
main screen. You can read more about switching sensitivity in Section 3.
2.5 Activation of the pump protection function
According to the factory default settings, the pump protection function is inactive. In order
to activate or deactivate it, 1st press the “SET” button to go to the main screen. Then press
the “DAY” and “PROG” buttons one after the other. Following this, activate or deactivate
this function by using the large and buttons. The notices “ ” and
“ ” indicate activated and deactivated state, respectively.
Finally, conrm the setting by pressing the “SET” button (if no buttons are pressed for
at least 15 seconds, the setting is automatically conrmed). After this conrmation, the
device goes back to the main screen.
To prevent the pump from sticking, the activated pump protection function switches on the
connected device for one minute period at 12:00 p.m. every day, if no switching has taken
place on the given day or the previous day (e.g. during the heating-free period).
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The pump protection function can accomplish its task only if the boiler is in working order
in the summer, too. It is reasonable to set a low temperature level, e.g. +10°C, on the
thermostat for this period, to prevent the boiler from unnecessary start-ups when the
weather turns cold temporarily.
2.6 Calibrating the thermometer of the thermostat
There is a possibility to calibrate the thermometer of the thermostat (to correct the
measured temperature). In order to do this, 1st press the “SET” button to go to the main
screen. Then press the “DAY” and “HOLD” buttons one after the other. After this, the notice
“” appears in place of the time characters, and the correction value appears in
place of the measured temperature ( °C by default). Following this, set the desired
correction value using the large and buttons between -3.0 °C and +3.0 °C, in
0.1 °C increments. Finally, conrm the setting by pressing the “SET” button (if no buttons
are pressed for at least 15 seconds, the setting is automatically conrmed). After this
conrmation, the device goes back to the main screen. The correction of the measured
temperature takes eect a couple of seconds after the conrmation.
3. OPERATION OF THE INSTALLED THERMOSTAT
The thermostat controls the device connected to it (e.g. gas boiler or pump) based on
the temperature measured by it and the currently set temperature, taking into account
the switching sensitivity of the thermostat (factory default ±0.2 °C). This means that if the
thermostat is set to heating mode and 22 °C, then with a switching sensitivity of ±0.2 °C
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