253
Control function
(3) Actual Boiler output will be translated from percentage to a ON/OFF output using hysteresis system.
0% 100% 50%
Boiler Load Factor
ON
OFF
● Boiler ON conditions
Load factor is higher than 50% and Hot water temperature [Tow3] of the hydraulic separator less than Boiler Target
temperature -1°C.
● Boiler OFF conditions
Load factor is 0% or Hot water temperature [Tow3] of the hydraulic separator more than Boiler Target +4 °C.
10.6.2 Boiler Operation during space heating
The conguration of this option should be done through the master controller.
Conguration →Complementary Heating →Boiler
Mark Description Default Value Range Steps Units
B_mode Combination mode Parallel Parallel/Alternative _ _
BB Bivalent Point -10 -20~20 1 °C
kscob Supply Setting Oset 4 0~10 1 °C
WTBO Waiting Time 30 5~90 5 min
(1) Boiler will only be enabled when Average Outdoor Ambient Temperature < [Bivalent Point ]. The decision as to how to
operate will be made considering ambient temperature.
(2) Boiler can work on 2 dierent modes: [Parallel] and [Alternative].
● [Parallel]
Boiler works as complementary source and Boiler / heat pump work together to supply heat during cold outdoor
temperatures.
Capacity
boiler
heater
Heat pump
EHb
Average Outdoor ambient temperature
BB