Computherm Q5RF User manual

COMPUTHERM Q5RF
Multi-zone wireless
(radio-frequency)
digital room thermostat
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 Q5RF type switched-mode room thermostat is suitable to
regulate the overwhelming majority of boilers and air conditioners. It can easily
be connected to any gas boiler having a two-wire thermostat connection point
and to any air conditioning apparatus or electrical apparatus, regardless of
whether it has a 24 V or 230 V control circuit.
The basic package of the device includes two COMPUTHERM Q5RF (TX)
thermostats and a receiver unit. If required, the equipment can be extended
by two additional COMPUTHERM Q5RF (TX) or Q8RF (TX) thermostats. The
receiver unit receives switching signals from the thermostats, controls the
boiler (or air conditioner) and gives commands to open/close the heating zone
valves (max. 4 zones, loadability of the zone outputs: 230 V AC, max. 2 A (0.5 A
inductive load)) associated with the thermostats.
The zones can operate independently from each other or, in case of need, all
zones can operate at the same time. This way only those rooms are heated at
a given time, where it is required (e.g. the living room and the bathroom during
the day, and the bedroom during the night). To control more than 4 zones at a
time we recommend using 2 or more COMPUTHERM Q5RF thermostats (1 Q5RF
thermostat is needed per 4 zones). In this case, the potential-free connection
points controlling the boiler (NO - COM) should be connected to the heater /
cooler device in parallel and the zone outputs work separately.
Because there is a wireless (radio-frequency) connection between the
thermostats and the receiver, no cable is required between the thermostats and
the boiler. The installation and connection of the receiver unit is described in
Section 7.
Thermostats Boiler
Reciever
230 V AC, 50 Hz Zone valves 230 V AC, 50 Hz

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Temperature can be measured and set more precisely as compared to simple,
conventional thermostats. In heating mode, in accordance with the selected
switching sensitivity, the thermostat switches the boiler or any other appliances on
and o󰀨 below and above the adjusted temperature, respectively, and contributes
to reduce energy costs while maintaining comfort. In cooling mode it switches
exactly the opposite way.
To increase the lifetime of the batteries, the thermostat will not transmit signals
continuously. Instead it will repeatedly transmit the actual signal every 5 minutes.
Therefore, the regulation of the heating or cooling will continue even after a
blackout.
The portability of the thermostat o󰀨ers 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,
• it is also advantageous when you intend to locate the thermostat in di󰀨erent
rooms in the course of the day (e.g. in the living room during the day but in
the bedroom at night).
The e󰀨ective range of the transmitter incorporated in the thermostat is approx-
imately 50 m in open terrain. This distance may become considerably shorter
within a building, especially when a metal structure, reinforced concrete or ado-
be wall stands in the way of radio waves.
An example of dividing the heating system into zones is shown in the gure
below:
living room
living room kitchen bathroom
bedroom
bedroom bedroom
receiver
distributor oor heat. distr.
oor heat. coll.
collector
boiler

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This wireless (radio-frequency) thermostat can also be easily extended with the
COMPUTHERM Q1R X socket if needed, with which the thermostat is able to con-
trol boilers or any other electrical devices operating on 230 V (50 Hz; max. 16 A)
(e.g. fan heaters, pumps, zone valves, etc.) according to the room temperature.
(You can nd detailed information and recommended usage of the COMPUTHERM
Q1RX socket on our website: www.computherm.info/en)
1. LOCATION OF THE DEVICE
The thermostat of the COMPUTHERM Q5RF type device can be freely moved in
your residence. It is reasonable to locate it in a room used regularly or for many
hours per day so that it is in the direction of natural ventilation in the room but
protected from drought or extreme heat (e.g. direct sunlight, refrigerator, chim-
ney, etc). Its optimal location is 0.75 - 1.5 m above oor level. Do not use in wet,
chemically aggressive or dusty environment. They can be placed on its 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
To put the thermostat into operation, detach the
rear panel of the thermostat from the front panel by
pressing the lock on the upper side of the housing of
the thermostat, as shown in the gure.
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.
Temperature
Temperature
measurement unit
Room temperature
is displayed
Set temperature
is displayed
Sign of the
boiler working
Sign of the air
conditioner
working
The information shown on the liquid crystal
display of the thermostat includes the following:

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Warning! Good quality alkaline batteries may only be used for this appli-
ance. Carbon-zinc batteries known as durable or long life batteries and charge-
able 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 batteries are
used.
After the batteries have been inserted, the display ashes the measured room
temperature. (If this information fails to appear on the display, press the „RESET”
button located on the main panel of the thermostat.
3. BASIC SETTINGS
After removing the rear panel of the device, the
following factory default settings can be modied
by relocating the jumpers (black plugs) and/
or changing the position of the orange-colored
potentiometer located on the main panel.
3.1 Selecting the Displayed Tempera-
ture
The temperature(s) to be shown on the display can be selected and set by the
left jumper.
With factory default settings the jumper is located on the central and uppermost
pins, in which case the display shows the currently measured room temperature
value, while the notice “ROOM” appears in the bottom right corner of the display. In
this case, the adjusted temperature is visible only during the adjustment process,
for approximately 6 seconds after the last button has been pushed. By relocating
the plug onto the bottommost and central pins the displayed temperature can
be modied so that the display alternately shows the current room temperature
and the adjusted temperature for 3-3 seconds, respectively. In this mode, the
notices “ROOM” and “SET” are alternately shown under the currently displayed
temperature in the bottom right corner of the display, indicating whether the
display shows the room temperature or the adjusted temperature value.
3.2 Selecting the Switching Sensitivity (Accuracy)
The switching sensitivity of the thermostat can be selected or adjusted by the
central jumper which detemines how much the thermostat switches the connect-
ed appliance on / o󰀨 below / above the set temperature.
With factory default settings the jumper is located on the central and uppermost
pins, resulting in a switching sensitivity of ±0.2 °C. It can be modied to
±0.1 °C by relocating the jumper onto the bottommost and central pins. 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.

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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 e󰀩ciency and hence increases
the gas consumption. We recommend using the ±0.1 °C switching sensitivity
for heating systems with high thermal inertia (e.g. underoor heating), and
the ±0.2 °C switching sensitivity (factory default setting) for heating systems
with low thermal inertia (e.g. at panel radiators). You can read more about
switching sensitivity in Chapter 5.
3.3 Switching between the Heating and Cooling Mode
The heating or the cooling mode of the thermostat can be selected by the right
jumper.
With factory default settings the jumper is located on the central and
uppermost pins, which selects the heating mode. By relocating the jumper
onto the bottommost and central pins, the cooling mode can be selected. The
NO - COM and the zone outputs of the receiver unit are turned on below the
set temperature in heating mode, and they are turned o󰀨 above the set
temperature in cooling mode (taking the switching sensitivity into account).
ATTENTION! If the modication of the basic settings was done after inserting
the batteries and the modications did not take e󰀨ect, please press the “RE-
SET” button located on the main panel of the thermostat.
3.4 Calibration of the thermometer of the thermostat
You can calibrate the thermometer of the appliance (to correct measured
temperature). To this end all you have to do is change the position of the
orange-colored potentiometer by a Phillips screwdriver. When you adjust the
potentiometer clockwise then the displayed temperature will be lower than
that measured initially, and when you adjust it anticlockwise the displayed
temperature will be higher than that. The displayed temperature can be
adjusted within a range of approx. ±4 °C.
Correction of the displayed temperature takes place a few seconds after the
adjustment.
3.5 Synchronising the Thermostat and the Receiver Unit
In order to have a safe, reliable and trouble-free
wireless (radio-frequency) connection, both the
thermostat and the receiver unit have their own
safety codes. After installing the receiver unit, the
two units should be synchronised by pressing the
“LEARN” button located on the main panel of the
thermostat. Therefore do not replace the rear pan-

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el of the thermostat onto the front panel before synchronisation. The process of
synchronisation is described in Section 7.2.
4. SETTING THE DESIRED TEMPERATURE
After putting the thermostat into operation and adjusting the basic settings the
thermostat is ready for operation and the adjustment of the temperature can be
started.
Below the temperature adjustment buttons ( and )
a switch is located. For both the economy (w ) and the comfort
(☼) positions of the switch a di󰀨erent temperature can be set
between 5 °C and 40 °C, in steps of 0.5 °C.
For energy e󰀩ciency it is recommended that the comfort temperature is only
used those times, when the room or building is in use, because every 1 °C de-
crease of temperature saves approximately 6% energy during a heating season.
The factory default temperature is 18 °C for the economy (w ) position and 20
°C for the comfort (☼) position. These default temperatures can be changed as
follows:
• Move the switch according to the temperature you would like to change
(economy (w) or comfort (☼)).
• Press the or button, after which the notice “ROOM” disappears,
the notice “SET” (adjusted value) appears in the bottom right corner of the
display. Meanwhile, the temperature value shown on the display switches
from room temperature to the default temperature (18.0 °C/20.0 °C) or to
the last set temperature (this temperature is blinking on the display). By
pressing the buttons repeatedly or continuously (the change in values is
accelerated), the desired temperature to be maintained at the place where
the thermostat has been installed can be set in steps of 0.5 °C.
• Approximately 6 seconds after setting the room temperature to be main-
tained, the device automatically switches to normal mode. The notice “SET”
disappears from the bottom right corner of the display, and once again the
current room temperature and the notice “ROOM” are displayed.
• The previously set temperature can be freely changed any time using the
and buttons. Always the last set temperatures are in e󰀨ect.
5. 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 the connection points NO and COM
of the receiver output relay are closed below 21.8 °C (heating is turned on) and
230 V AC is displayed on the output for that zone and NO and COM opened at
temperatures above 22.2 °C (heating is turned o󰀨) and the 230 V AC voltage at

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its output for that zone is turned o󰀨. In cooling mode, the relay switches exactly
the opposite way.
The status of the zone outputs is indicated by the "HEAT” (heating) or "A/C”
(cooling) icon in the lower left corner of the devices display, depending on the
selected operating mode.
After setting the economy and comfort temperatures, the temperature desired at
the moment can be selected using the switch.
5.1 Economy Mode ( ) (left hand position of the switch)
In the left hand position of the switch, the thermostat provides the set economy
temperature (e.g. night temperature) to be maintained at the place where the
thermostat has been installed.
5.2 Comfort Mode (☼) (right hand position of the switch)
In the right hand position of the switch, the thermostat provides the set comfort
temperature (e.g. daytime temperature) to be maintained at the place where the
thermostat has been installed.
6. BATTERY REPLACEMENT
The average lifetime of the batteries is 1 year. The icon alternately replacing
the temperature value on the display indicates low battery voltage. Replace
the batteries whenever the icon indicating low battery voltage appears on
the display (see Section 2). After battery replacement, the desired temperature
should be adjusted again, because during the battery replacement the thermostat
is reset to factory default settings.
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 batteries are used.
7. THE RECEIVER UNIT
7.1 Installation and connection of the receiver unit
WARNING! The device must be installed and connected by a qualied pro-
fessional. Before installing, make sure that that neither the thermostat nor
the device to be controlled is connected to the 230 V mains voltage. Modi-
fying the thermostat can cause electric shock or product failure.
WARNING! We recommend that you design the heating system you want to con-
trol with the COMPUTHERM Q5RF thermostat so that the heating medium can cir-
culate in the closed position of all zone valves when a circulating pump is switched
on. This can be done with a permanently open heating circuit or by installing a
by-pass valve.

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WARNING! In switched on state 230 V AC voltage appears on the zone outputs,
the maximum loadability is 2 A (0.5 A inductive). This information should be con-
sidered during installation.
The receiver unit of COMPUTHERM Q5RF thermostat should be mounted on the
wall in a place protected from dripping water, dusty and chemically aggressive
environment, extreme heat and mechanical damage. When choosing the
location of the receiving unit you should remember that bulky metal objects (e.g.
a boiler, bu󰀨er tank, etc.) and metal building structures may have an adverse
e󰀨ect on propagation of radio waves. If it is possible, in order to ensure trouble-
free RF connection, we recommend that you install the receiving unit at a height
of 1.5 to 2 m and at a distance of 1 to 2 m from the boiler or other bulky metal
constructions. We recommend that you check reliability of RF connection at the
place selected before installing the receiving unit.
AT T EN TI ON! Do not install the receiver unit under the housing of the boiler or
near hot pipes because it may damage the parts of the device or compromise
wireless (radio-frequency) connection. To avoid electric shock, entrust a special-
ist with connecting the receiver unit to the boiler!
Unscrew the two screws at the bottom of the receiver unit without removing
them. Following this, remove the front panel of the receiver unit then x the back
panel to the wall in the vicinity of the boiler with the screws provided. Remove the
protective carton from the contacts to ensure perfect contact.
The marks of the connections are pressed into the plastic above the connection
points:
L1 N1 L2 N2 L3 N3 L4 N4 NO COM L N
230 V mains voltage should be supplied to the receiver unit. This provides the
power supply for the device, but this voltage does not appear on the connection
points of the relay that controls the boiler (NO and COM). We propose to
connect the neutral wire of the network to point N, while the phase conductor
to point L. It is not necessary to connect a ground wire because the product is
double insulated. We recommend to de-energize the device when heating is
continuously not needed (e.g. during summer).
The receiver unit controls the boiler or air conditioner through a potential-free
relay whose connection points are: NO and COM. Connect the two connection
points of the heating or cooling equipment to be controlled to terminals NO and
COM, i.e. to the normally open terminals of the relay, as shown in the gure
below.

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The NO and COM connection points become closed following the heating/
cooling command of any thermostat.
If you would like to operate an old boiler or any other device that has no
connection points for thermostats, then the connection points NO and COM of
the thermostat should be connected to the mains cable of the device, similarly as
a switch would be connected.
AT T EN TI ON! Always consider the loadability of the receiver unit and follow
the manufacturer’s instructions of the heating or cooling equipment. The device
must be installed and connected by a qualied professional!
The voltage appearing at terminals NO and COM depends only on the system
being controlled, therefore the dimensions of the wire are determined by the type
of the device to be controlled. The length of the wire is of no signicance, the
receiver unit may be installed either near the boiler or far away from it, but do not
install it under the housing of the boiler.
Beside controlling the boiler, the receiver unit can also open/close the valves
of maximum 4 heating zones. Following the heating/cooling command of one
of the thermostat, 230 V AC, 50 Hz voltage appears on the connection points
of the zone valves associated with the thermostat. The zone valves should
be connected to the connection points L1 N1; L2 N2; L3 N3 and L4 N4 of the
receiver.
The size of the connection points of the COMPUTHERM Q5RF zone
controller allow at most 2 or 3 devices to be connected in parallel to any
heating zone. If more than this is needed for any of the heating zones
(e.g. 4 zone valves), then the wires of the devices should be joined before
they are connected to the zone controller.
In case of using electro-thermal zone valves that operate slowly and all
the zones are closed when the boiler is inactive, then the boiler should
be started with a delay in order to protect the pump of the boiler. In case
of using electro-thermal zone valves that operate fast and all the zones
are closed when the boiler is inactive, then the valves should close with a
230 V AC
50 Hz
230 V AC
50 Hz
Heating unit (boiler)
Zone valves
Rear panel of the receiver unit

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delay in order to protect the pump of the boiler. See Section 7.3 for more
information on the delay funcions.
When the two units of the thermostat can only be located on or outside the
boundary of the range due to the layout of the building or the shielding e󰀨ect of
the building structures between the units then, in order to guarantee reliable RF
connection, please install a COMPUTHERM Q2RF type RF transmitter between
the two units.
7.2 Putting the receiving unit into operation
Turn on the power supply to the receiver unit. A few seconds after the LED
lights ash once, the receiver unit becomes ready for operation. This state is
indicated by the blue LED with the "A/M" sign. The thermostats and receiver in
the basic package are factory sychronized. If the receiver still does not receive
commands from one of the thermostat switches or you want to connect additional
thermostats to the receiver, you can synchronize a thermostat with the receiver
by following the steps below:
In the automatic mode of the receiver (blue LED is lit), press and hold one of the
buttons on the receiver (e.g. for zone number 1) (for about 3 seconds) until the
LED next to the button ashes red. If you want a thermostat to control more than
one zone, you must perform this step for each such zone. After the red LED for
each zone with which you want to synchronize the thermostat ashes, press and
hold the thermostat "LEARN" button located on the main panel of the thermo-
stat, and keep it depressed (approx. 10 seconds) until the red LED (s) on the re-
ceiver do not stop ashing (they go out or light up continuously depending on the
temperature set on the thermostat). The receiver then "learns" the transmitters'
(thermostats') security code. The safety code will not be lost even during a power
outage, the device memorizes it automatically.
After tuned together, the receiver unit receives switching signals from the
thermostats, controls the boiler (or air conditioner) and gives commands to open/
close the heating zone valves associated with the thermostats. The receipt of
switching signals is indicated by the switched on or o󰀨 state of the red LED
associated with the thermostat on the receiver. By repeating the above steps,
tune all of the thermostats and the receiver together.
7.3 Delay of the outputs
When designing the heating zones - in order to protect the pumps - it is advisable
to keep at least one heating circuit that is not closed by a zone valve (e.g. bath-
room circuit). If there are no such zones, then in order to prevent the heating sys-
tem from an event in which all heating circuits are closed but a pump is switched
on, the zone controller has two types of delay functions.
Turn on delay
If this function is activated and the outputs of the receiver are switched o󰀨, then in

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order to open the valves of the given heating circuit before starting the pump(s),
the NO-COM output of the receiver switches on only after a delay of 4 minutes
from the rst switch-on signal of the thermostats, while 230 V appears immedi-
ately at the output for that zone (e.g. Z2). The delay is especially recommended
if the zone valves are opened/closed by slow-acting electrothermal actuators,
because their opening/closing time is approx. 4 min. If at least 1 zone is already
switched on, then the Turn on delay function will not be activated when additional
thermostats switch on.
The active state of the Turn on delay function is indicated by the blue LED ash-
ing with 3-second intervals.
If the “A/M” button is pressed while the Turn on delay is active (blue LED ashes
with 3-second intervals), the LED stops ashing and indicates the current op-
erating mode (Automatic/Manual). Then the working mode can be changed by
pressing the “A/M” button again. After 10 seconds, the blue LED continues to
ash with 3-second intervals until the delay stops.
Turn o󰀨 delay
If this function is activated and some thermostat outputs of zone controller are
switched on, then in order to keep the valves belonging to the given zone open
during the recirculation of the pump(s), the 230 V AC voltage disappears on
the zone output of the given zone (e.g. Z2), only after a delay of 6 minutes from
the switch-o󰀨 signal of the last thermostat, while the NO-COM output switches
o󰀨 immediately. The delay is especially recommended if the zone valves are
opened/closed by quick-acting motorized actuators, as their opening/closing
time is only a few seconds. Activating the function in this case ensures that the
heating circuits are open during the circulation of the pump and thus protects
the pump from overload. This function is only activated when the last thermostat
sends the switch-o󰀨 signal to the receiver.
The active state of the Turn o󰀨 delay function is indicated by the 3-second inter-
val ashing of the red LED of the last zone switched o󰀨.
Activating/deactivating of the delay functions
To activate/deactivate the Turn on and o󰀨 delay functions, press and hold the
Z1 and Z2 buttons on the receiver for 5 seconds until the blue LED ashes with
one second intervals. You can activate/deactivate the functions by pressing the
buttons Z1 and Z2. The LED Z1 shows the Turn on delay status, while the LED
Z2 shows the Turn o󰀨 delay status. The function is activated when the corre-
sponding red LED is lit.
To save the settings and return to the default state wait 10 seconds. When the
blue LED stops ashing the zone controller resumes the normal operation.
The delay functions can be reset to the factory defaults (deactivated state) by press-
ing the “RESET” button!

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7.4 Transmission distance inspection
With the help of the and buttons you can check whether the two
units are within the transmission distance of the wireless (radio-frequency) con-
nection. In order to do so, set the desired temperature above room temperature
by more than 0.2 °C, then reduce it below room temperature by more than 0.2
°C. When detecting the ON and OFF control signals, the red LED light on the
receiver unit switches on and o󰀨, respectively. When the receiver unit fails to
receive signals sent by the thermostat, then the receiver unit is outside the trans-
mission distance of the wireless (radio-frequency) transmitter, thus they have to
be placed closer to each other.
ATTENTION! When the two units of the thermostat can only be located on or
outside the boundary of the range due to the layout of the building or the shield-
ing e󰀨ect of the building structures between the units then, in order to guarantee
reliable RF connection, please install a COMPUTHERM Q2RF type RF transmit-
ter between the two units.
7.5 Manual control of the receiver unit
Pressing the “A/M” button separates the thermostats from the receiver unit. In
this case, the boiler or air conditioner connected to the receiver unit can only be
turned on and o󰀨 manually, without any temperature inspection. The continuous-
ly illuminated blue LED indicates automatic (thermostat-controlled) mode, while
its switched o󰀨 state indicates manual mode. In manual mode, pressing the 1,
2, 3, and/or 4 buttons of the receiver unit turns on or o󰀨 the boiler / air condi-
tioner and opens/closes the zone valves associated with the heating zones. The
operation of a heating zone is indicated by the illuminated red LED associated
with it. By pressing the “A/M” button again, the device quits manual control and
resumes automatic (thermostat-controlled) operation, which is indicated by the
illuminated blue LED.

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FREQUENTLY ASKED QUESTIONS
When you think that your appliance is operating incorrectly or encounter any
problem while the appliance is being used then we recommend that you read
Frequently Asked Questions (FAQ) available on our website, where we collected
the problems and questions that most frequently occur while our appliances are
being used, along with the solutions thereto:
www.computherm.info/en/faq
The vast majority of the problems encountered can be solved easily by using the
hints available on our website, without seeking professional help. If you have not
found a solution to you problem, please pay a visit to our qualied service.
Warning! The manufacturer does not assume responsibility for any direct
or indirect damages and loss of income occurring while the appliance is
being used.
Remark:
In addition to using modern temperature regulators, the following up-to-date regulation
methods also contribute signicantly to the improvement of the comfort provided by the
heating network, the energy e󰀩ciency of the heating network and the coe󰀩cient of perfor-
mance:
• By dividing the heating network into sections or zones and with their separate regulation
we can ensure that every room (zone) is heated only when it is necessary. (You can
obtain information on the establishment of the heating network and apparatuses and
ttings needed for division into zones in our publication titled “Energy Savings and
Comfort” which is also available on our website www.computherm.info).
• Using programmable thermostats you can ensure that every room (zone) is just
heated according to a timetable preset in accordance with the demands. (You can
obtain information on the services provided by COMPUTHERM Q7; Q7RF and Q8RF
programmable room thermostats on our website).
• Using modern modular heating devices equipped with an external temperature sensor
the boiler can be operated at a higher e󰀩ciency.
• Using low temperature heating networks (e.g. 60/40 °C) and condensing boilers the
temperature of the ue gas leaving the boiler can be reduced, and this way fuel e󰀩ciency
can be improved signicantly.
PRODUCT INFORMATION DATA SHEET:
• Trademark: COMPUTHERM
• Model identier: Q5RF
• Temperature control class: I. class
• Contribution to the e󰀩ciency of seasonal space heating: 1%

TECHNICAL DATA
Technical data of the thermostats (transmitters):
‒ temperature measurement range: 3 to 45 °C (in 0.1 °C increments)
‒ adjustable temperature range: 5 to 40 °C (in 0.5 °C increments)
‒ temperature measurement accuracy: ±0.5 °C
‒ selectable switching sensitivity: ±0.1 °C; ±0.2 °C
‒ temperature calibration range: approx. ±4 °C
‒ battery voltage: 2 x 1.5 V ALKALINE batteries
(LR6 type; AA size)
‒ power consumption: 1.5 mW
‒ battery lifetime: approx. 1 year
‒protection against environmental impacts: IP30
‒ operating frequency: 868.35 MHz
‒transmission distance: approx. 50 m in open terrain
‒storage temperature: -10 °C to +40 °C
‒ operating humidity: 5% - 90% (without condensation)
‒ operating frequency: 868.35 MHz
‒ dimensions: 100 x 80 x 22 mm (without holder)
‒ weight: 80 g
‒ temperature sensor type: NTC 3435 K 10 kΩ ±1% at 25 °C
Technical data of the receiver unit:
‒ power supply voltage: 230 V AC, 50 Hz
‒ power consumption: 0.15 W
‒ switchable voltage of the relay that
controls the boiler: max. 30 V DC / 250 V AC
‒ switchable current of the relay that
controls the boiler: 8 A (2 A inductive load)
‒ voltage of the zone outputs: 230 V AC, 50 Hz
‒ loadability of the zone outputs: 2 A (0.5 A inductive load)
‒ duration of activable Turn on delay function: 4 minutes
‒ duration of activable Turn off delay function: 6 minutes
‒ protection against environmental impacts: IP30
‒ storage temperature: -10 °C - + 40 °C
‒ operating humidity: 5% — 90% (without condensation)
‒ dimensions: 130 x 90 x 32 mm (W x H x D)
‒ weight: 210 g
Total weight of the device: approx. 470 g
(2 thermostats + 2 holders + 1 receiver)

The COMPUTHERM Q5RF type thermostat complies
with the requirements of directives RED 2014/53/EU
and RoHS 2011/65/EU.
Manufacturer: QUANTRAX Ltd.
Fülemüle u. 34., Szeged, H-6726, Hungary
Phone: [phone] • Fax: [phone]
E-mail: [email protected]
Web: www.quantrax.hu • www.computherm.info
Origin: designed in the EU, made in China
Copyright © 2020 Quantrax Ltd. All rights reserved.
Please watch our video presentation of the most important aspects
of the usage of this thermostat at our websites!