Spheros Thermo 230 Notice De Montage page 52

Installation of the circulating pump
5.5. Motor for circulating pump model U 4855 (Aquavent 6000C)
and U 4856 (Aquavent 6000SC)
These circulating pumps are equipped with a brushless motor.
5.5.1. Soft Start
The motor starts up slowly and in a way that is gentle to the material.It
takes approx. 5 sec. until maximum speed is reached.
5.5.2. Run-dry protection (only U 4855 and U 4856)
In the event of a dry running motor the slide ring gasket may be dama-
ged. A dry running motor has a very high speed while the current con-
sumption is slow.
The dry running protection is activated if the current consumption (effec-
tive) is 0,5 A > I < 4 A, the motor isn't just in the start phase, n > 33001/
min and the waiting period is exceeded.
Waiting period: M3G074CF44-17: 8 - 10 s
M3G074CF44-16: 40 - 45 min
Waiting periods depend on power supply level. The device will be swit-
ched into the sleep mode 10 s after the waiting period is passed.
5.5.3. Blocking protection
If the speed drops below 571/min, the motor is switched off after approx.
1 second by the error mode. If the motor does not complete a whole rev-
olution within 1 second despite the medium flow, it will also be shut down
by the error mode.
5.5.4. Error mode
The error mode switches off the motor in the event of faults. The motor
is switched to power-saving sleep mode by the error mode after approx.
5 seconds.
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5.5.5. Sleep-Mode
In the sleep mode the internal consumers of the motor electronics are
switched off. The current consumption in this mode is then < 2 mA.
5.5.6. Motor reactivation
The motor can be reactivated from sleep mode. This is done by discon-
necting it from the power supply approx. 2 minutes. When the voltage
supply is reconnected the motor will restart in soft start mode.
5.5.7. Polarity reversal protection
The motor does not feature an internal polarity reversal protection. The
motor is protected against polarity reversal through the wiring harness
and a 25 A fuse.
Thermo 230/300/350