COMPUTHERM Q7 Programmable, digital room thermostat Operating Instructions
GENERAL DESCRIPTION OF THE THERMOSTAT The COMPUTHERM Q7 type switched-mode room thermostat is suitable to regulate the overwhelming majority of boilers available in Hungary. It can easily be connected to any gas boiler or air conditioning device that has a double wire connector for a room thermostat, regardless of whether it has a 24 V or 230 V control circuit.
SE T The buttons of the thermostat HO LD DA LI Y G HT RE SE CO T PR PY O G your residence or office to the required temperature at the dates and times specified by you, to reduce energy costs while maintaining comfort. Separate independent daily temperature programs can be prepared for each day of the week. Six switching times (which can be set at 10-minute intervals) can be selected at your discretion every day, and separate temperatures (which can be adjusted in 0.
The switching sensitivity of the thermostat can be selected: ±0.2°C (factory default setting, recommended for radiator-based heating systems) or +0/-0.2°C (this setting is recommended for underfloor heating). This figure means the temperature difference between the adjusted value and the actual temperature measured during the switching process. For example, if the factory default setting is 20°C on the thermostat then the device switches on the boiler at 19.8°C or below this level and switches it off at 20.
The information shown on the liquid crystal display of the thermostat includes the following: The days of the week Time Set temperature Manual control indicator Programme number Timed manual control indication Current temperature of the room Dead battery Sign of boiler in operation 5
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). Its optimal location is 1.5 m above floor level.
2. INSTALLATION OF THE THERMOSTAT • Pressing the lock on the upper side of the housing of the thermostat, remove the back cover of the thermostat as shown in the figure below. • 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 output relay of the thermostat has three potential-free connection points, i.e. No. 1 (NO); No. 2 (COM) and No. 3 (NC), which are located under an inner cover on the inner side of the rear panel. To control heating, connect the two connection wires of the device to be controlled to terminals No. 1 (NO) and No. 2 (COM), i.e. to the normally open terminals of the relay, while the two connection wires of the cooling equipment should be connected to terminals No. 2 (COM) and No. 3 (NC), i.e.
The voltage appearing at terminal No. 1, No. 2 or No. 3 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 significance. 3. PUTTING THE THERMOSTAT INTO OPERATION, BASIC SETTINGS 3.1 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 figure above.
well as adjusted and measured temperatures. (If this information fails to appear on the display, press the “RESET” button with a wooden or plastic stick. To press the button, do not use any electrically conductive materials or graphite pencil). After the batteries have been inserted, press the “SET” button. After the “SET” button is pressed, the display stops flashing, the thermostat goes to the main screen and the setting process can be started.
Wednesday 3, etc.). Press the “DAY” button again. At this time the number indicating the day stops flashing and becomes visible continuously while the numbers indicating the hour will flash on the display. Using the large or button 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 flashing and become visible continuously, while the numbers indicating the minute will begin flashing.
3.3 Setting switching sensitivity According to factory default settings, the switching sensitivity is ±0.2°C (the display indicates this setting with symbol “S:1”) which can be modified to +0/-0.2°C (the display indicates this setting with symbol “S:2”). The required switching sensitivity can be set by pressing ”DAY”, “COPY” and the large or buttons one after the other, after going back to the main screen by pressing the “SET” button. Setting “S:1” (±0.2°C switching sensitivity) or “S:2” (+0/-0 .
where plate radiators are installed) with low thermal inertia, while the +0/-0.2°C switching sensitivity (the display shows symbol “S:2” for this setting) is recommended to control heating systems with high thermal inertia (e.g. underfloor heating). 3.4 Activation of the pump protection function Under the factory default settings, the pump protection function is inactive.
protection function switches on the boiler for a one minute period at 12:00 p.m. every day outside the heating season. (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 on the thermostat for this period, e.g. +10°C, to prevent the boiler from unnecessary start-ups when the weather turns cold temporarily). 4.
switching time P2 is reached. After switching time P2 the temperature selected to switch P2 will be valid. Note! The software of the thermostat will only enable increasing consecutive times to be set, in accordance with the serial number (P1; P2; etc.) of the switches.
The temperature pattern, of course, can be freely modified so that a temperature curve is available for each day of the week to meet your needs in the best possible way. 4.1 Programming steps: • Press the “SET” button to go back to the main screen. • Press the “SET” button again and hold it down and press the “PROG” button, too. At this point the device gets into programming mode and the numbers indicating the days of the week (1 2 3 4 5 6 7) are flashing on the display.
be performed separately for each day of the week, selecting the days one by one. (If there are days for which you intend tocreate the same program, it is sufficient to create the program only once, because it can easily be applied to any other day with the help of the “COPY” button as described in Section 4.2). • Press the “PROG” button again. At that point the next programming step should be done, i.e.
• Set the temperature level of switch P1 by pressing, or pressing repeatedly, the large........or........button on the front panel of the device. (The temperature can be set in 0.5°C increments). • Press the “PROG” button again. At this point the next programming step should be performed, i.e. the starting time of switch P2 should be set. As in the previous steps, the time value to be set will flash on the display.
• Similarly to the previous steps, with the help of “PROG” button and the large and/or buttons perform settings until the time and temperature of switch P6 is set. • After the temperature of switch P6 has been set, by repeated pressing of the “PROG” button the set values can be inspected and data can be modified by repeating the steps described above. • After you have set all values, press the “SET” button to acknowledge set values and to go back to the main screen.
the “COPY” function. The notice “COPY” appearing in place of the hour characters and the flashing serial number 1 indicating Monday shows that conditions are ready for copying a program. • Select the day (e.g. 2) whose program you wish to copy to another day or other days by pressing, or pressing repeatedly, the large........or........button on the front panel of the device. • Press the “COPY” button to copy the program of the selected day.
• Following this, by pressing, or pressing repeatedly, the large........or........button on the front panel of the device, you can choose further days of the week and can copy the program of the day selected beforehand (e.g. 2) by pressing the “COPY” button to these days too. • After you have finished copying the program, press the “SET” button to go back to the main screen.
(days), the symbol of switch P1 and the time and temperature level set for switch P1 will appear on the display. (None of the values is flashing). Repeatedly press the “PROG” button to check the switching values of P2, P3, etc. • The switching values set for various days can be displayed by pressing buttons........or........and the “PROG” button. • After checking the program, you can go back to the main screen by pressing the “SET” button.
5. TEMPORARY MODIFICATION OF THE TEMPERATURE CORRESPONDING TO THE PROGRAM To simplify manual temperature modifications, with factory default settings temperatures of 18°C and 22°C are assigned to the large........ button and........button, respectively. When modifying the temperature manually by pressing the........or........button once, the temperature will immediately jump to the factory value of the button.
The cost-effective and standard temperature values assigned to buttons........and........in the factory can be freely modified as follows: • To set a cost-effective temperature, press the “SET” button and keep it depressed then press the........button once and, following this, with the help of the........and/or.......buttons, set the cost-effective temperature selected by you. After the temperature has been set, press the “SET” button again to fix the set temperature value and to go back to the main screen.
the main screen. (After approximately 10 seconds the adjustment that has been finished will be automatically acknowledged and the thermostat will go back to the main screen). If you wish to operate your device in a way that differs temporarily from the program that has been set (e.g. on holidays or the winter holidays), you can choose among the following options: 5.1 Temperature modification until the next program switch Set the required temperature by pressing, or pressing repeatedly, the large........or..
that is, 1 hour 2 minutes). After this time has elapsed, the........icon disappears and the device returns to the program that has been set. If you wish to return to the set program before the time of the next switch is reached, please press the “SET” button. 5.2 Temperature modification for 1-9 hours (party program) Set the required temperature by pressing, or pressing repeatedly, the large........or........button on the front panel of the device, and then press the “DAY” button. On the display the........
set (e.g. for 3 hours) then the........icon disappears after the set time has elapsed, and the device will continue to work according to the program that has been set. Press the “SET” button before the time set for temperature modification has expired to interrupt the temperature modification and return the device to operating according the program. 5.3 Temperature modification for 1-99 days (holiday program) Set the required temperature by pressing, or pressing repeatedly, the large........or........
required (e.g.10). The display will show alternately the exact time and the number of days remaining in manual control. The........icon disappears after the set time has expired, and the device will continue to work according to the program that has been set. Pressing the “SET” button before the time set for temperature modification has expired, the temperature modification will be interrupted and the device will return to operate according the program. 5.
manual control. Pressing the “SET” button stops temperature modification and the device will return to operate according the program. 6. TURNING ON THE BACKGROUND LIGHT When you press the ”LIGHT” button, the background light of the display will turn on for 10 seconds. When you press another button while the display is illuminated, the background light will turn off only after 10 seconds have elapsed since the last button had been pushed. 7.
should be set again after the batteries have been replaced, but the device saves the program that has been loaded even without batteries therefore there is no need to reprogram them. On the other hand, pressing the “RESET” button deletes the program loaded and makes the device restore factory default settings.
TECHNICAL DATA — switchable current: — temperature measurement range: — adjustable temperature range: — temperature measurement accuracy: — selectable switching sensitivity: — storage temperature: — power supply voltage: — power consumption: — battery lifetime: — dimensions: — weight: — temperature sensor type: 31 8A (2A inductive load) 0 to 35°C (in 0.1°C increments) 7 to 35°C (in 0.5°C increments) ±0.5°C ±0.2°C (for radiator-based heating systems) +0/-0.
A brief description of programming • Setting the date and time: with the “DAY” and or buttons • Programming: press and hold down the “SET”, while pressing the “PROG” button, then adjust values with the “PROG” and or buttons; use the “COPY” button to copy repeated programmes. • Program control: with the “PROG” and or buttons.
