Tornatech GLU, Installation And Maintenance Manual, Page: 6 / 61

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Important: to avoid damaging the contactor, it is recommended to start the motor in this manner:
1) Shutdown the main power by using the main disconnect means,
2) Push the emergency button and lock it in closed position,
3) Turn the power back on by using the main disconnect means.
SEQUENTIAL START
In case of a multiple pump application, it may be necessary to delay the automatic (pressure drop) starting of each
motor to prevent simultaneous starting of all motors.
WEEKLY START
The engine can be started (and stopped) automatically at the preprogrammed time.
TEST START
The motor can be started manually by pressing the run test button.
METHODS OF STOPPING
MANUAL STOP
Manual stop is done by pressing the priority STOP push button. Note that pressing the stop push button will
prevent the motor from restarting as long as the button is pressed, plus a two second delay.
AUTOMATIC STOP
Automatic stop is possible only after an automatic start and this function has been activated. When this function is
enabled, the motor is automatically stopped 10 minutes after the restoration of the pressure (above the cut-out
threshold) given that no other run cause is present.
FLOW STOP, HIGH ZONE STOP
If the controller has been started by the FLOW/ZONE START/STOP input and the signal has returned to normal,
the motor will be stopped given that no other run cause is present.
EMERGENCY STOP
The emergency stop is always possible in any starting condition and is done by using the main disconnecting
means located on the door.
Transfer switch operation Sequence
TRANSFER TO ALTERNATE POWER SOURCE
The Transfer to Alternate Power Source starts automatically when at least one of the following conditions are
present:
- Normal Power voltage falls below 85% of nominal voltage,
- Normal Power Phase Reversal is detected,
- Transfer Switch Test push button is pressed.
When an under voltage condition on any phase of the Normal Power source is detected by the sensor, a 3 second
normal power source outage delay timer starts timing.
If the normal source voltage rises above the sensor dropout setting before the 3 second time delay expires, the
transfer sequence is cancelled.
If the Normal Power source voltage is still below the sensor dropout setting (85%) when the time delay expires, a
relay is deactivated sending a signal to start the generator set. At the same time, a voltage and frequency sensor
begins monitoring the Alternate Power Source. The sensor will accept the alternate power source only when both
voltage and frequency reach a pre-set pickup value. An approximate 15 second time span occurs because the
engine-driven generator cranks, starts and runs up to nominal pickup value.
When the Alternate Power Source is within acceptable limits (above 90% of the nominal voltage) for a certain set
time (factory set at 3 seconds), the transfer to alternate power source is initiated.
The transfer switch will remain in the alternate power source position until the normal source is restored.
RETRANSFER TO NORMAL
Important: The transfer switch will stay in alternate position, if the motor is running, for as long as the alternate
power source is within acceptable limits. The retransfer sequence is enabled if the motor is not running.