Liebert VM12000, VM18000 8-18kVA Single Line Diagram

8 - 18 kVA Start-Up Checklist

1. Open (turn OFF) UPS Output Circuit Breaker.

2. Open (turn OFF) customer supplied distribution circuit

breakers.

3. Turn OFF critical loads and plug them into output

distribution units or customer-supplied distribution.

4. Turn ON battery circuit breaker on rear of UPS.

5. Roll unit to final position. If using flexible conduit for

power connections, allow at least 18 inches of

clearance around the UPS with enough conduit to roll

UPS 3 feet from wall. If using rigid conduit, allow at

least 3 feet of clearance around the UPS. Adjust

leveling feet.

6. Close (turn ON) customer-supplied circuit breaker that

supplies power to the UPS.

7. Close (turn ON) the UPS Input circuit breaker to

supply power to UPS control circuits. The fans and

LCD display activate.

8. The LCD display prompts you to review and accept

default settings or configure the UPS for your

application. See page 11 for default settings.

9. After configuration, automatic self-tests begin. If self-

tests are OK, a horn sounds and the ”Close Breaker

then Press ON” message appears. If any other

message appears, contact Liebert at 1-800-222-5877.

10. Close (turn ON) Output circuit breaker on back of

UPS and press the ON button.

11. The UPS tests the inverter and displays the Normal

Operation message.

12. Close (turn ON) customer-supplied distribution circuit

breakers.

13. Turn on each critical load one at a time. The UPS

provides filtered, regulated power to protect valuable

processes and data.

8-18kVA Single Line Diagram

AUTO / MANUAL BYPASS

SURGE

SUPPRESSION

AND EMI

FILTER

BATTERY

CHARGER

BATTERY

INVERTER

AUTO / MANUAL

BYPASS

EMI

FILTER

FRONT END CONVERTER

L3 (OPT)

L1, L2