Computherm q3rf Manuale utente
COMPUTHERM
Q3RF
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.
GENERAL DESCRIPTION OF THE THERMOSTAT
The
COMPUTHERM
Q3RF type switched-mode room ther-
mostat is suitable to regulate the overwhelming majority
of boilers and air conditioners. It can be easily connected
to any gas boiler having a two-wire thermostat connection
point and to any air conditioning apparatus or electrical ap-
paratus, regardless of whether they have a 24 V or 230 V
control circuit.
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230 V AC
50 Hz
230 V AC
50 Hz
boiler
receiver
thermostat
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.
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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:
The device consists of two units. One of them is the portable
control unit (thermostat), while the other unit is the receiver
that controls the boiler. Because there is a wireless (radio-
frequency) connection between the two units, no cable is
required between the thermostat and the boiler. The two units
have been tuned in the factory. The trouble-free operation
is ensured by its own security code. The installation and
connection of the receiver unit is described in Chapter 7.
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 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,
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– it is also advantageous when you intend to locate the ther-
mostat in dierent rooms in the course of the day (e.g. in
the living room during the day but in the bedroom at night).
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.
This wireless (radio-frequency) thermostat can also be
easily extended with the
COMPUTHERM
Q1RX socket if
needed, with which the thermostat is able to control any
electrical device (e.g. fan heaters, pumps, zone valves, etc.)
operating on 230 V (50 Hz; max. 16 A) according to the room
temperature. (Detailed description of the
COMPUTHERM
Q1RX socket and usage suggestions can be found on our
website www.computherm.info.)
The
COMPUTHERM
Q3RF thermostat can be used as an
extension to the
COMPUTHERM
Q5RF or Q8RF multi-zone
devices.
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The simultaneous use of several
COMPUTHERM
room
thermostats and one
COMPUTHERM
Q4Z zone controller
provides the possibility for the thermostats to also control a
pump or a zone valve in addition to starting the heater or
cooler. This way it is easy to divide a heating / cooling system
into zones, thanks to which the heating / cooling of each room
can be controlled separately, thus greatly increasing comfort.
Furthermore, the zoning of the heating / cooling system will
greatly contribute to the reduction of energy costs, as due
to this only those rooms will be heated / cooled at any time
where it is required.
1. LOCATION OF THE DEVICE
The thermostat of the
COMPUTHERM
Q3RF 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, chimney, etc). Do not use in wet, chemically
- 6 -
aggressive or dusty environment. Its optimal location is 0.75-
1.5 m above oor level. It 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 thermos-
tat, as shown in the gure.
The battery compartment is in
the inner side of the front panel of
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the housing. Insert 2 AA alkaline batteries (LR6 type) in
accordance with the diagram in the battery compartment.
Warning!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 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 modied
by relocating the jumpers (black
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plugs and/or changing the position of the orange-colored
potentiometer) located on the main panel.
3.1 Selecting the Displayed Temperature
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 cent-
ral 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 modied so that the display
alternately shows the current room temperature and the adjus-
ted 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
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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 by
the central jumper, which determines how much below/above
the set temperature the thermostat switches on/o the device
connected to it.
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 modied 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.
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
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