TECO F33 Series, Instruction Manual, Page: 44 / 192

Main Features 41
7.6.2 Fixed MASTER
This is the default setting of the Pump Control. The F33
controls the Master pump which is always running. The
relay outputs start and stop the other pumps P1 to P6,
depending on flow/pressure. In this configuration a
maximum of 7 pumps can be controlled, see Fig. 43. To
equalize the lifetime of the additional pumps it is possi-
ble to select the pumps depending on the run time his-
tory of each pump.
Fig. 48 Fixed MASTER control
7.6.3 Alternating MASTER
With this function the Master pump is not fixed to the
F33 all the time. After the VSD is powered up or started
again after a stop or sleep mode the Master pump is
selected via the relay set to function Master Pump. sec-
tion 7.6.7 on page 44 shows a detailed wiring diagram
with 3 pumps. The purpose of this function is that all
pumps are used equally, so the lifetime of all pumps,
including the Master pump, will be equalized. Maximum
6 pumps can be controlled with this function.
Fig. 49 Alternating MASTER Control
7.6.4 Feedback ‘Status’ input
In this example the additional pumps are controlled by
an other kind of drive (e.g. soft starter, frequency
inverter, etc.). The digital inputs on the I/O Board can
be programmed as a “Error” input for each pump. If a
drive fails the digital input will monitor this and the
PUMP CONTROL option will not use that particular drive
anymore and automatically switch to another drive.
This means that the control continues without using
this (faulty) drive. This function can also be used to
manually stop a particular pump for maintenance pur-
poses, without shutting down the whole pump system.
Of course the maximum flow/pressure is then limited to
the maximum pump power of the remaining pumps.
NOTE: The pumps MAY have different powers, however
the MASTER pump MUST always be the largest.
See menu:
[393] Select Drive
[39H]
to [39N] Run Time 1 - 6, Pump
[554] to [55C] Relays
NOTE: The pumps MUST have all the same power.
See menu:
[393] to [396]
[553] to [55C]