Pellet burner GP xx sc 27
6.2.12. ACTIVATION OF OPTION “OPERATION WITH HEAT ACCUMULATOR
(BUFFER)”.
A NECESSARY CONDITIONS:
Preliminary from the manufacturing company must be activated option DUAL NTC POP = 1.
This option is in the Super user menu, access to which is only for the Factory Company or
Authorized Service Center.
ACTIVATION:
In the
Advanced menu
, parameter
Thermostat
, when enabled in
Super user menu
parameter
DUAL NTC POP
, occur following operating opportunities for integrated
thermostat:
THERMOSTAT:
Thermostat type:
"Ëxternal 230 VAC" - never used!
"Temp A" - is not usually used;
"Room + Temp A" - usually used in all facilities without heat accumulator
-
default
;
"Temp BC" - is not usually used;
"Temp BC + Room" - usually used in facilities with heat accumulator.
During the operation with heat accumulator is selected
"Temp BC + Room".
In this case
operates three NTC sensors:
Sensor A - water temperature in the boiler;
Sensor B - water temperature at the upper part of the heat accumulator;
Sensor C - water temperature at the lower part of the heat accumulator.
Sensors B and C are called DUAL SENSOR and they are with common connector that
connects to the EXT 5 on the main board (please see figure below).
The operational algorithm for heat accumulator is the following:
The heat source (burner, boiler), charged the accumulator with heat is switch on
when the temperature of sensor B is below the set value;
The heat source (burner, boiler), charged the accumulator with heat is switch off
when the temperature sensor C reaches the set value.
Sensor A follows the temperature in the boiler, emergency modes, modulation and the
incorporation of the pump.