Danfoss DHP-H Installation And Service Instructions Manual page 47

HYSTERESIS
In order to start the heat pump in advance during sudden changes of the heat demand, there is a value, HYSTERESIS, which controls the
difference between the actual supply temperature, t
the set HYSTERESIS value (x), i.e. there is a heat demand, or the heat demand disappears, quicker than the usual integral calculation, the
integral value is forced to either the start value INTEGRAL A1 or to the stop value 0°min.
SUPPLY TEMP.
and the calculated supply temperature, t
1
HYSTERESIS
(∆t) ≥ x
INTEGRAL
Figure 88: Conditions for HYSTERESIS to force the integral value to change.
HYSTERESIS
(∆t) ≥ x
Compressor start
(-60)
VMBMA602
. If the difference is the same or greater than
2
t
1
t
2
TIME
Compressor stop
(0)
47