Forza Elipse Series, Service Manual

Page: 33 / 51

33
5.3.2.3 Remove a UPS from the parallel system
1. If you need to remove the UPS in normal running, press on “OFF” button of the
UPS to be removed twice in succession to turn off the UPS and the UPS will cut off
its output;
2. Disconnect the output breaker, the input breaker on the rear panel of the UPS, the external
input breaker, and battery breaker of the UPS that need to be removed.
3. Disassemble the cover of maintenance bypass switch of the UPS will continue work. Turn
the maintenance bypass switch from “UPS” to “BPS”, turn off the input mains breaker on
the rear panel, and the battery breaker of the remained UPS
4. After all UPSs shutdown, disassemble the cover of the parallel port on the UPS connected
with the parallel cable of the UPS that need to be removed. Remove the parallel cable and
screw the cover of the parallel port back again.
5. Disassemble the cover of the parallel port of UPS that need to be removed and remove the
parallel cable of it.
6. Connect the parallel cables of the remained UPSs in parallel correctly connected, to get
most safety, the parallel cable should be connect from a close ring in the parallel system,
after checking cable has been correctly connected screw the cover of the parallel port back
right back to place.
7. Disassemble the input /output/battery wiring of the UPS to removed.
8. If the remained UPS system becomes a single UPS system and will work in unitary mode
after removing the single UPS, strongly recommend connect the short connection wire of
the JP1 and JP2 located on the Terminal block of the remained UPS.
9. Close all of the input mains breakers of the remained UPSs. After all UPSs transfer to the
Bypass mode, turn the UPS maintenance switch from “BPS” to “UPS” and screw the
maintenance cover back again. Then turn on all of the UPSs and the system now work
normally in parallel operation or unitary operation.
10. If the removed UPS will be used in unitary mode, JP1 and JP2 on the terminal block should
be connected with a short connection wire.
Notes for remove UPS from parallel system:
1. The UPS in the parallel system will cut off its output if the “OFF” button is pressed twice in
succession.