Specification

Event log function
The AUTO
ADAPT
function incorporates an event log that
learns the scheme of demand for hot water in the
domestic hot-water system. Via the event log, the pump
predicts when to start circulating hot water.
The event log function stores the weekly tapping events in
the system. The hot-water consumption pattern for two
weeks is stored in the event log. See example.
Date
Time of day
00:00 00:20 00:20 00:40 ------> 07:00 07:20 07:20 07:40 07:40 08:00 08:00 08:20 ------> 23:30 23:50
01 0 0 0 T 0 0 0
02 0 0 0 T T 0 0
03 0 0 0 T 0 0 0
04 0 0 0 T 0 0 0
05 0 0 0 0 T 0 T
06 0 0 0 T 0 0 0
07 0 0 0 T 0 0 0
0: No consumption.
T: Tapping event is registered.
Example
• From 07:20 to 07:40, six tapping events (T) are
registered (morning bath).
• From 07:40 to 08:00, two tapping events (T) are
registered.
• From 23:30 to 23:45, one tapping event (T) is
registered.
This pattern implies that hot water should be available for
tapping from 07:20 to 08:00.
At 08:00 the pump can stop circulating hot water.
Likewise, the pump should circulate hot water for use from
23:30 to 23:50.
The data shown is for one week of operation only. The
pump stores data for two weeks. When data for two
weeks has been logged, the pump is able to distinguish
between the tapping pattern during workdays and
weekends.
Pump control
Pump operation is based on the data stored in the event
log and on the temperature of the pipes.
The pump control incorporates a temperature hysteresis,
meaning that the pump ensures that the hot-water
temperature is within the range of what is accepted as hot
water. This temperature hysteresis control is enabled
when the data content of the event log makes it probable
that hot water will be tapped within the next 20 minutes.
In the example, the hysteresis control will start at 07:00
and run continuously until 08:00.
Disinfection and flushing
Once a week a disinfection function is run for 15 minutes.
If, at another time of the week, a higher temperature is
measured, the disinfection run will be shifted to this time.
If the pump is switched off for eight hours, it will be on to
do a flushing of the circulation pipe with a duration of 15
minutes.
Fault indication
Defective external temperature sensor
If in AUTO
ADAPT
, the red error indicator LED is on and
goes off when the pump is switched manually to
temperature control mode, the external temperature
sensor is defective. In this case, the pump turns internally
to temperature control mode because the external
temperature sensor is needed for the AUTO
ADAPT
control
mode. The display does not automatically change to
temperature control mode.
Defective internal temperature sensor
If in AUTO
ADAPT
, the red error indicator is on and does
not go off when the pump is switched manually to
temperature control mode, the internal temperature
sensor is defective. In this case, the pump uses the
external temperature sensor for the temperature control
mode.
COMFORT
3
8
Functions