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8.
Determine what type of bypass switch you are using:
If the bypass switch is a Break-Before-Make type, skip this step and proceed to Step 13.
If the bypass switch is a Make-Before-Break type, verify that the AC voltages from the UPS and the AC line
input are in phase. Measure the voltage between the following points on the terminal block and record in
the spaces below. These measurements must be no more than 20 Vac; if they are, call your service
representative.
Terminal 7 to 11
Terminal 8 to 12
9.
Measure the AC voltage between the following points on the terminal block and record in the space
below. This reading must be no more than 1 Vac; if it is, call your service representative.
Terminal 6 to 10
10. Switch the bypass switch to LINE. Measure the voltage to the protected equipment (at the load
distribution panel) and verify that it is correct.
11. Switch the bypass switch to UPS and verify the voltage to the protected equipment is still correct.
12. Reinstall the bypass switch front cover and UPS front covers using the original screws.
13. If the UPS will not be operated immediately, switch the bypass switch to SERVICE and push in the DC
emergency disconnect switch button on the back panel of the external battery cabinet closest to the UPS.
Otherwise, continue to Step 14.
14. When starting the UPS, apply input power to the UPS by closing the service circuit breaker: l If external
battery cabinets are installed, close the DC emergency disconnect switch button on the back of each
external battery cabinet. Insert the switch key supplied with the cabinet into the button and turn clockwise
1/2-turn. Pull the button out to close the switch. Turn the key back counter-clockwise, and remove the key.
15. The UPS front panel display automatically turns on whenever input power is present and at least one
power module is installed. Set up the initial operating parameters through the front panel display (see "
6.5 Initial Startup Parameters
16. If applicable, test proper operation of optional external control signals and computer communication before
connecting the load.
17. If there are receptacles on the UPS rear panel, plug the equipment to be protected into the UPS output
receptacles.
NOTE
18. Turn on the equipment that is connected to the UPS.
19. If there is an external bypass switch, turn it to UPS. Otherwise, close the load distribution circuit breaker
(s).
6 6 . . 5 5
I I n n i i t t i i a a l l S S t t a a r r t t u u p p P P a a r r a a m m e e t t e e r r s s
NOTE
" ).
DO NOT protect laser printers with the UPS because of the exceptionally high power
requirements of the heating elements.
For a complete description of control panel operation menus and displays, see , "
7.1 Normal Operation
" .
4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 09
Initial Startup Parameters
67
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