Danfoss EPU 2370, Instructions Manual, Page: 17 / 48

BC-HM
VI.72.M4.02

Danfoss 11/97 17
P2.0 Actual temperature at sensor S2
Display of actual temperature at sensor S2.
P2.1 Required temperature at sensor S2
Display of temperature required (reference temperature) at sensor S2.
P2.2 Temperature difference between S1 and S2: 1 - 30°C
(System 1 D and 1 E only)
Setting of temperature difference between S1 charging temperature and sensor S2
(sensor S6) cutout temperature.
P2.3 Anti-bacteria function: 10 - 99°C or (- -)
Setting of temperature the storage tank is to reach when the anti-bacteria function is
cut in. Duration and frequency must be set on the time switch controlling relay
output R2.
The anti-bacteria function is OFF when (- -) is displayed.
P2.4 Proportional band - Xp: 1 - 199 K
Setting of proportional band - Xp. The proportional band gives the temperature
range in which the length of motor control pulse is proportional to the temperature
deviation. Outside this range the control pulse is constantly ON. With a small
proportional band there is a risk of instability.
P3.0 Actual temperature at sensor S3 (frost sensor)
Display of actual temperature at sensor S3.
If a KP thermostat is connected, the display becomes “- - -” when the input is short-
circuited.
P3.1 Required frost protection temperature at sensor S3: 2 - 10°C or “- -”
Setting of the temperature at which the system is to be frost-protected when frost
protector S3 is used. All Pt 1000 type sensors can be used. If “- - ” is set in the
display no S3 temperature can be received from the master control.
P3.4 Integration time - Tn: 1 - 899 s
Setting of integration time - Tn. The integration time expresses the time that elapses
until the I-function has changed the output signal like the P-function. A short
integration time gives fast control but with large overshoot (risk of instability).