Riello UPS Multi Sentry 160 MST, Installation And Use Manual

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O
PERATING MODE
The mode that ensures the most load protection is the ON LINE mode, where power for the load undergoes a double
conversion and is reconstructed at output in a perfectly sinusoidal way, with frequency and voltage fixed by the precise digital
control of the DSP independently from the input (V.F.I.).
*
It is possible to select the following modes next to the traditional double conversion ON LINE operating mode:
 ECO (LINE INTERACTIVE)
 SMART (SMART ACTIVE)
 STBYOFF (STAND-BY OFF)
In order to optimise performance, the load is normally powered by the bypass in ECO mode (any disturbances presented on the
mains can have repercussions on the load). In the case of no mains or simply output from expected tolerances, the UPS will
transfer to normal double conversation ON LINE operation. Approximately five minutes after mains power returns within
tolerance, the load is switched back to bypass.
In the event that the user is not able to decide which operating mode is best for use (between ON LINE and ECO), he can
entrust the choice to SMART ACTIVE mode.Based on statistics detected regarding power mains quality, the UPS decides on its
own which mode to configure.
Finally, in STAND-BY OFF mode, operation is configured as back-up:
in the presence of mains, the load is not powered, during a black-out, the load is powered by an inverter by means of batteries,
to then be switched off again upon mains return. Intervention time is less than 0.5 sec.
*
The RMS output voltage is determined by the DSP independently of the input voltage, while the frequency of the output voltage is
synchronized (within a tolerance to be set by the user) with that of the input for bypass use. Outside of this tolerance, the UPS
desynchronizes, bringing itself to the nominal frequency and bypass can no longer be used (free running mode).
CAUTION: When UPS's are connected in parallel, the ECO (LINE INTERACTIVE), SMART (SMART ACTIVE)
and STBYOFF (STAND-BY OFF) modes are not available.
M
ANUAL BYPASS
(SWMB)
CAUTION: Contact a service centre should any malfunctions be detected.
UPS maintenance can only be performed by skilled personnel who have been trained by the manufacturer.
CAUTION: dangerous voltages can be present inside the device, even if the input, bypass, output and
battery switches are open.
Removal of the UPS's panels by unqualified personnel is dangerous and can cause harm to the operator,
equipment and utilities connected to it.
Operations to be performed in order for setting the UPS in "Manual bypass" status without interrupting power to the load:
 Caution: if the UPS is in battery operation, manual bypass insertion may cut off power to the load.
Close the manual bypass switch SWMB behind the door: this connects the input directly to the output .
 Open the SWIN input, SWBYP bypass and SWOUT output switches. Open the external UPS battery line switch/fuses.
The control panel will switch off after a few seconds.
In this operating mode, any disturbance or blackouts on the UPS power line will have repercussions on the powered
equipment (the UPS is no longer active and the load is connected directly to the mains).
Operations to be performed to start up the UPS in "Manual bypass" status without cutting off power to the load:(to be performed
only when no faults or malfunctions have been detected):
 Close the SWIN input, SWBYP bypass and SWOUT output and the external UPS battery line switches. The control
panel will reactivate. Restart the UPS from the "SYSTEM ON" menu. Wait for the sequence to be completed.
 Open the manual bypass switch SWMB: the UPS will resume normal operation.