Part 2: Overview of display values and settings
Expert
area
33
!
It is essential that the HW STAGES are at the
beginning of the BUS ID sequence => 01 - xx.
CONTROL DEVIAT (header control variance)
Display of the header control variance
(set temperature – actual temperature).
DES OUTPUT (required system output [in %])
Display of currently required total output % (0-100)
=> Calculated set value from control system = System load
in per cent. The value is calculated, floating, and does not
take any skips caused by the switching operation into
account.
SWITCH VAL (-99 – +99)
Internal control value
If this value reaches "0", the next heat generator is also
connected (only after the delay time has elapsed). If the
switching value reaches "-0", the last heat generator is
switched off.
If the desired temperature is exceeded by 1K the last heat
generator is also switched off.
BLOCK TIME (currently remaining value)
Display of current delay time. Only if "delay = 0“ is it
possible to operate the next heat generator.
T-BOIL MAX (maximum temperature of the heat
generator)
Protects individual heat generators in the cascade from
overheating /
prevents triggering LIMITER (limiter value).
This parameter is used to set a temperature at which the
different heat generators switch themselves off, or - in the
case of modulating heat generators - modulate themselves
down. The HS switch themselves on again as soon as the
temperature drops below the set temperature by 5K (only
for HS via BUS)
!
The temperature selected for T-BOIL MAX must be
higher than the maximum header temperature.
DYN UPWARD (dynamic heat generator connection
[K])
Small value = fast connection
Large value = slow connection
E
Values set too low can lead to overheating or short-
term connection of a heat generator.
Calculation: If the cumulative system deviation in Kelvin
reaches the set value A, this results in connection of all
heat generator stages.