Man-1128_K25400_series_Power_Supply_Manual_15
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11. Mains Voltage Selection
The K25000 series power supplies will be supplied as 240V input voltage selected as standard, but may be optionally
supplied as 110V if requested when the power supply was ordered.
The selected voltage of the power supply is clearly shown on the power supply cover.
In the unlikely event that the power supply input voltage needs to be changed, this may be performed by the addition
/ removal of a link on the power supply circuit board, using the following procedure.
Warning:
High voltages exist within the power supply unit. Ensure that the mains power is switched off and fully
isolated before working on the power supply.
1) Ensure that the mains power feed is disconnected and isolated from the power supply unit.
2) Disconnect and insulate the mains input cables from the power supply
3) Disconnect the battery leads from the standby batteries (if connected)
4) Carefully remove the 14 way ribbon cable connected to J5
5) Remove the cables from the 24V DC load terminals
6) Loosen the two M4 screws located on the fixing flanges on the right hand side of the power supply unit
7) Carefully remove the two M4 screws on the left side of the power supply unit, ensuring any washers & ring crimps
are kept safe. These screws are located in the top left corner of the power supply and between the battery lead
terminals and ribbon connector plug.
8) It should be possible to remove the power supply unit from the enclosure.
9) The cover of the power supply can now be removed by removing three small Posidriv screws / washers. Two of
these are located on the right side of the power supply, the other in the top left corner of the power supply cover.
A
fourth screw located in the lower left of the power supply will also need to be removed before the cover can be
carefully lifted away.
10) With the cover removed it is possible to see the circuit board with the mains input voltage selection link position
11) Link J1 should be removed for 240V operation, fitted for 120V operation.
Take care to ensure that the correct selection for the mains input voltage is made, as damage may occur
to the power supply if the wrong mains voltage is applied.
12) Re-fit the power supply cover ensuring all four screws and washers are used.
13) Replace the power supply in the panel enclosure, ensuring all washers and earth bonding straps are correctly
installed
14) Replace the ribbon cable, load cable and mains / battery connections
