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follow the indicated polarity when connected. In a reverse connection does not fail, but the
temperature is unreal.
4.4. DIFFERENT OPTIONS AND SPECIFIC RULES TO BE FOLLOWED DURING
INSTALLATION AND USE.
- By Boiler Thermo regulator
The set point of the controller is set by the potentiometer for manual adjustment located on
the front control panel and it is permanent. In this case an installation of thermostatic valves
at each radiator will make it possible to control the temperature in each room individually.
The water temperature in the boiler is set manually by the user and doesn’t depend on the
ambient temperature, whereas the thermostatic valves affect the boiler controller and
electrical power by dosing the consumed heat power. In operating mode the boiler is in
steady state and maintains constant water temperature while the power varies.
It is a shortcoming that because of the manual adjustment the water temperature may
be lower or higher than what is really necessary to maintain the set points of the
thermostatic valves in the different rooms.
- By the external weekly programmable thermo regulator
It should be mounted in the heated rooms. It determines the duration of operation and rest of
the boiler, depending on the program entered and the temperature in the premises. In
operating mode the set point of the cthermo regulator is determined by the manual
adjustment unit located on the front panel and is constant. In this case thermostatic valves
can be installed at the radiators in all the heated rooms except the room where the
programmable controller is placed. If a thermostatic valve is installed in the same room, it
should be fully open in order not to prevent the normal operation of the programmable
thermo regulator. The water temperature in the boiler is adjusted manually by the user and
doesn’t depend on the ambient temperature. The thermostatic valves influence the boiler
regulator by dosing the consumed heat power and the room temperature influences the
duration of the boiler operating time. An advantage of this method is the convenient control
of the boiler directly from the room, disadvantage is the frequent switching between on and
off state, in order to maintain the room temperature.
The boiler/module doesn’t work in
steady state mode and there are large temperature oscillations. (The boiler is worked in
ON/OFF mode according the room temperature).
- By room thermo regulator (proportional)
The proportional thermo regulator is mounted in any of the heated rooms. While in operation
the set point of the boiler temperature controller varies, it is determined by the signal from
the room temperature controller and depends on the difference between the set and the
measured temperature value. The thermostatic valves can be installed at the radiators in each
room, except the room where the room temperature controller is installed. If the thermo
regulator and a thermostatic valve are installed in the same room the valve must be fully
open. During the operation the boiler is in steady state mode having the water temperature
optimally adapted for maintaining the temperature set at the room thermo regulator. When
the room temperature changes the set point for the boiler controller will also change
correspondingly.
Over-consumption of energy is eliminated and this method is also
