Diaphragm liquid pump with linear drive FMM 80
Operation
KNF Flodos AG BA_FMM80_EN_08_164464.docx
Translation of original Operating and Installation Instructions
15
7.5. Short-time operation with a maximum frequen-
cy of 16.7Hz
Short-time operation with a maximum frequency is used to in-
crease the flow rate, e.g. in order to fill the system quickly. When
operating at the maximum frequency of 16.7 Hz (ON 30 ms, OFF:
30 ms) the permissible duty time (ED) must be observed.
In order to prevent the permissible coil temperature (T
s_max
) from
being exceeded, the pump must not be operated for more than 20
minutes at 16.7 Hz. This must be followed by a currentless interval
(SP) lasting 100 minutes. If operated for a shorter time at 16.7 Hz,
the currentless interval is reduced proportionately. For short-time
operation at 16.7 Hz, this results in a %ED of no more than
16.7 % (see
Fig. 8: Duty time in short-time operation, page 15
).
For a given duty time, the minimum duration of the currentless
interval is calculated a
s follows: SP ≥ 5 · ED.
Fig. 8: Duty time in short-time operation
