Computherm Q3 Manuel utilisateur
COMPUTHERM
Q3
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
Q3 type switched-mode room thermostat
is suitable to regulate the overwhelming majority of boilers and air
conditioners available in Hungary. It can be easily connected to any
gas boiler having a two-wire
thermostat connection point
and to any air conditioning
apparatus or electrical
apparatus, regardless of
whether they have a 24
V or 230 V control circuit.
Temperature can be
measured and set more
precisely as compared to 230 V AC
50 Hz
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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 the opposite way.
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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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
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 aggressive
or dusty environment. Its optimal location is 0,75-1.5 m above oor
level.
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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. INSTALLATION OF THE THERMOSTAT
WARNING! The device must be
installed and connected by a qualied
professional. Before installing, make
sure that that neither the thermostat nor
the device to be controlled is connected
to the 230 V mains voltage. Modifying
the thermostat can cause electric shock
or product failure.
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• To install the thermostat, 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.
• With the help of the screws provided and some tools fasten
the rear panel of the device to the wall.
• Using a small screwdriver, remove the cover of
the terminal block from the inner side of the rear
panel. The thermostat controls the boiler or air
conditioner through a potential-free alternating
relay that has the following connection points:
1 (NO); 2 (COM) and 3 (NC). These connection
points are located under an inner cover on the
inner side of the rear panel.
• Connect the two connection points of the heating
or cooling equipment to be controlled to the
normally open 1(NO) and 2(COM) terminals of the relay. If you
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would like to operate an old boiler or any other device that has no
connection points for thermostats, then the 1 (NO) and 2 (COM)
connection points of the thermostat should be connected to the
mains cable of the device, similarly as a switch would be connected.
• To prevent electric shock, replace the inner cover removed for the
connection of wires after the assembling process has been
completed.
ATTENTION! Always consider the loadability of the thermostat
and follow the manufacturer’s instructions of the heating or cooling
equipment. The device must be installed and connected by a qualied
professional. The voltage appearing at terminals 1 (NO) and 2 (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 signicance.
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3. PUTTING THE THERMOSTAT INTO OPERATION
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!
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 “RESET” button located on the main panel of the
thermostat.
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4. BASIC SETTINGS
After removing the rear panel
of the device, the following
factory default settings can
be modied by relocating the
jumpers (black plugs) and/or
changing the position of the
orange-colored potentiometer
located on the main panel.
4.1 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 central and
the uppermost pins, in which case the display shows the currently
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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 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.
4.2 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
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