Operation manual for M RS 420 ESTYMA control unit
12
BOILER OPERATION MODES
The boiler can work in one of the following modes: weather-compensated, manual
or summer mode.
NOTE!!!
The boiler operation modes differ in the
way the boiler temperature is set. Even if the
manual boiler operation mode has been selected,
the mixer actuator continues to be controlled
(provided that the required sensors have been
installed).
WEATHER-COMPENSATED MODE WITH MIXER ACTUATOR CONTROL
NOTE!!!
The controller will work in this mode provided that the central heating
temperature sensor has been connected.
In this mode, the outdoor temperature sensor and central heating temperature
sensor, delivered with the unit, must be installed. The boiler temperature is
determined by linear approximation of the programmable heating curve, so there
is no need to change the boiler temperature manually when the outdoor
temperature changes. As a rule, nights are colder than days. The boiler
temperature is a function of the outdoor temperature.
The
boiler temperature setting
is calculated using the heating curve and it is
20ºC higher.
When
the contacts of the room temperature regulator are open
, the
temperature in the heating circuit will be decreased by the value of the parameter
“reduction”, in the “HEATING” submenu.
NOTE!!!
When tap water needs to be heated, the controller automatically
changes the boiler temperature to heat the water as quickly as possible, and then
it returns to operating according to the heating curve.
MANUAL MODE
In this mode, the user sets the set boiler operation temperature manually using
the parameter “boiler progr”. When tap water needs to be heated, the controller
automatically changes the boiler temperature to heat the water as quickly as
Figure 5: BOILER submenu
