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24
3. Installation and Setup
WARNING:
Make sure the UPS is not turned on prior to installation. The UPS should not be turned on until all wiring has been
completed and checked.
WARNING:
If an external battery pack is installed, switch off the battery breaker before installation.
WARNING:
Installation and wiring must be performed in accordance with the local codes/regulations and installed using the
following instructions by a qualified electrical service technician only.
Note: Set the battery pack breaker in the “OFF” position, then install the battery pack.
• Pay close attention to the rated battery voltage posted on the rear panel. Connecting battery packs with the incorrect voltage may cause
permanent damage to the UPS.
• Pay close attention to the polarity markings on the external battery terminal block and make sure the correct battery polarity is
connected. Wrong connection may cause permanent damage to the UPS.
• Ensure the protective earth ground wiring is correct. The wire current spec, colour, position, connection and conductance reliability
should be carefully observed.
• Ensure the utility input and output wiring is correct. The wire current spec, colour, position, connection and conductance reliability
should be checked carefully. Make sure the R, S, T and N wiring is correct, not reversed and not short-circuited.
3.5 UPS Installation for Parallel Systems
If the UPS is only used for single operation, you may skip this section and proceed to section 3.7.
1) Parallel configuration supports up to three UPS systems. Do not attempt to link more than three UPS systems via parallel configuration.
2) Install and wire the UPS system according to section 3.5 guidelines.
3) When installing the parallel system, the length of input wires (R, S, T, N) in one UPS must be equal to the input wires of the other UPS.
Likewise, the length of output wires (R, S, T, N) must also be in equal length. If not, it will cause unbalance current on the output load.
4) Connect the input wiring of each UPS to an input breaker.
5) Connect all input breaker wiring to a main input breaker.
6) Connect the output wiring of each UPS to an output breaker.
7) Connect all output breakers to a main output breaker. This main output breaker will directly connect to the loads.
8) If an external battery pack is used, each UPS must be connected to an independent battery pack or a common battery pack.
Note: The parallel system cannot use a common external battery pack. Doing so will cause permanent damage to the entire system.
9) Refer to the following wiring diagram for parallel installation:
Wiring Diagram of Parallel System S3M30KX, S3M40KX, S3M30KX/NIB and S3M40KX/NIB Models
UPS 2
Output Input
UPS 1
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