Riello UPS Multi Sentry 160 MST, Installation And Use Manual

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UPS S
TORAGE
The storage site must meet the following requirements:
Temperature: -25°÷60°C
Degree of relative humidity:
30÷95% max
E
LECTROMAGNETIC COMPATIBILITY
This UPS complies with applicable EMC (Category C3).
CAUTION:
This product is designed for second environment* commercial and industrial applications - it may be necessary during
installation to introduce certain restrictions and take additional measures to prevent disturbances.
Connection to USB and RS232 connectors must be made with the supplied cables or, however, with shielded cables that are no
longer than 3 metres.
(*) Type of environment defined in EMC regulations
O
VERVOLTAGE PROTECTION
The UPS has been designed to be powered by an AC mains supply with category 2 voltage spikes. if it connected to an AC
supply with different characteristics or if it is potentially subject to even transitory overvoltage, external protection equipment
must be installed to it.
A
IR EXCHANGE IN THE BATTERY ROOM
The room in which the battery box is installed must be provided ventilated so as to keep the concentration of hydrogen
generated during charging within safe limits.
The room should preferably be ventilated naturally; if it cannot be, forced ventilation may be employed.
Standard EN 50272-2 regarding air exchange provides that the minimum aperture must satisfy the following equation:
A = 28 x Q = 28 x 0.05 x n x Igas x C10 (1/10³) [cm²]
where: A = surface free of air input/output opening
Q = air flow to be exhausted [m³/h]
n = number of battery elements;
C10 = battery capacity in 10 hours [Ah]
Igas = gas producing current [mA//Ah]
according to the standard:
Igas = 1 in backup charging for VRLA type batteries (*)
Igas = 8 in fast charging for VRLA type batteries (*)
(*) for open vessel or nickel batteries, contact the battery manufacture for details.
- example calculation
Type of battery: VRLA
Number of elements: 240 (40 mono-blocks)
Capacity: 120Ah
Igas (**): 8 (fast charging)
A = 28 x Q = 28 x 0.05 x n x Igas x C10=28 x 0.05 x 240 x 8 x 120 x 1/10³ = 322 cm
2
(**) to increase the safety margin, we take the fast charging condition, well aware that the battery mostly runs in backup
charging mode. Using the backup charging value for Igas would result in a value of one eighth of the above.
The air intake/outlet must be located so as to be most favourable to circulation, e.g.:
- openings on opposing walls
- with a minimum distance of 2 m if both on the same wall.