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TRGOVINA TERMOSTROJ d.o.o.
10250 Lučko, F. Puškarića 1d
Tel/Fax +385 1 6531-008, 6531-015, 6531-016 Eurposka unija
e-mail: info@termostroj.com web: http://www.termostroj.com European Union
1.4.5. Limiting the minimum and maximum temperature of the water in the boiler
If the heating curves and offset are selected correctly and the room temperature is falling, in
transitional period in heating seasons ( fall, spring) minimal temperature of the water in the boiler has to
be changed.
If the building cannot accumulate heat (sudden and short worming during the day) the necessary
temperature of water in the boiler will be too low and will not keep up the desired room temperature.
Limitation of the maximum temperature of water in the boiler serves more as a protection. Factory
setting is 90
o C, and we suggest lowering it to approximately 80 o C. Limitation of the maximum
temperature of water in the boiler is also used in central heating and domestic water preparation
system, and because of that it is not advisable to lower that temperature too much because the
domestic water will warm up slowly on higher temperatures.
1.5. Functionality of hot domestic water
1.5.1. Availability
Termo Extra boilers with options W , and Termo PTV boilers enable the preparation of hot water in
separate water storage with heat exchanger.
1.5.2. Description
Domestic water conditioning has the preference order over central heating. At the moment of signaling
the need for warming up the domestic water container by the domestic water temperature sensor, the
circulation pump of central heating is switched off, and the circulation pump for domestic water
conditioning is switched on.
Heaters regulate the desired water temperature in the boiler that is 25°C higher than set values of the
desired domestic water temperature (independent of central heating curve).
Circulation pump for domestic water conditioning supplies the container until the desired temperature
of domestic water is reached, upon which it is switched off with previously described and programmed
time delay.
If the central heating is off, either floor or radiators’ heating, at the moment of reaching the desired
domestic water temperature, the desired water temperature in the boiler is set to minimum value of
water temperature in the boiler (stand by).
At repeated requests for heating the domestic water container, the desired water temperature in the
boiler is set to 25°C higher than set values of the desired domestic water temperature.
Circulation pump for domestic water conditioning is switched on as late as the water temperature in a
boiler reaches the same or higher temperature than desired value of domestic water temperature.
The 5°C difference for warm water conditioning is programmed. It means that if the desired
temperature of domestic water tank is 60°C, then the central heating will be switched off and domestic
water conditioning switched on as late as domestic water temperature is lower than 55°C, and heating
will be switched on and domestic water conditioning switched off when the temperature in domestic
water tank reaches 60°C, and when the programmed time of supplemental operation of domestic
water circulation pump has passed.
If the time for domestic water conditioning is longer than 30 minutes, i.e. if the desired temperature of
domestic water tank is not reached within 30 minutes, the process will be automatically interrupted and
switched to the heating regime, which in this case lasts at least 30 minutes.
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