Full Product Manual

Functions
9
Grundfos COMFORT
3
Temperature control mode for all
AUTO
ADAPT
(BA, BXA) variants
The regulation of the COMFORT AUTO
ADAPT
models
is based on temperature control. The operating range
of the pump is kept within a calculated temperature
range. This means that the pump operates in an
average temperature area providing the maximum
comfort and saves energy at the same time.
Fig. 10 Comfort in heat application
With temperature control, the maximum temperature
measured at both sensors is stored and the pump
automatically calculates the gap between T
stop
and
T
start
. The pump switches on when one of the sensors
detects a lower temperature than T
start
. The pump
switches off when the T
stop
temperature is exceeded
on both sensors.
Fig. 11 Temperature control mode
Continuous 100 % mode
The pump is running continuously at full speed without
any control.
Temperature control mode for BT
and BXT variants
COMFORT PM BT and BXT variants have an
integrated temperature control mode that controls the
circulation. The temperature control mode switches the
pump off when a preset temperature limit T
off
is
reached, and back on when a preset temperature limit
T
on
is reached.
These temperature limits are set automatically and
dynamically. Manual settings are not needed.
After the first installation or after a power cut-off, the
pump carries out an identification run for 10 minutes to
verify the system temperature. Based on the result,
T
on
and T
off
are calculated. The identification run is
repeated every 12 hours to avoid a wrong temperature
setting, for example during night setback of the water
heater.
•T
on
= T
sys
- 14 °C
•T
off
= T
sys
- 7 °C
TM06 0947 1214TM06 0948 1214
water
o
C
T
water
o
C
T
T
supply
T
return
T
supply
Time
T
stop
T
start