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Introduction
2
1.2 Start-Up Procedure
Before beginning start-up, make certain that unit was installed according to the instructions in the
Installation Manual. Verify that the fan shipping bolt has been removed, the check valve has been
installed (on air cooled units), and that the scroll compressor is rotating in the proper direction. All
exterior panels must be in place with the front panel open.
Locate the start-up form supplied with your unit documents. Complete the form during your start-up
and mail it to Liebert when start-up is completed. Contact your Liebert supplier if you have any ques-
tions or problems during your unit installation, start-up, or operation.
1. Disconnect all power to the environmental control unit.
2. Tighten all electrical wiring connections that may have loosened during shipping (on electric
panel and at all major components, such as compressor, reheats, humidifier and motor).
3. Remove all line voltage fuses except the main fan fuses at the far right of the electric panel and
the Control Voltage fuses at the far left of the electric panel. For units supplied with circuit
breakers, open them instead of removing fuses.
4. Turn on power and check line voltage on main unit disconnect switch. Line voltage must be
within 10% of nameplate voltage.
5. Turn ON main unit disconnect switch and check secondary voltage at transformer T1. Voltage at
T1 must be 24 VAC ±2.5 VAC (check at TB1-1 and TB1-8). T1 voltage must not exceed 28 VAC.
Change primary tap if necessary.
6. Push ON button. Blower will start.
7. If you do not want your unit to operate at factory default settings, set temperature and humidity
setpoints and sensitivity, alarms, and other control functions. Refer to 2.0 - Operation with
Advanced Microprocessor Controls or 3.0 - Operation with Advanced Microprocessor
with Graphics Control.
8. Stop unit by depressing ON/OFF button on the front display. Turn OFF main unit disconnect and
main breaker.
9. Replace all fuses (or reset circuit breakers) that were removed in Step 3.
10. Restore power to unit; turn ON the main unit disconnect switch.
11. Push ON button - putting the unit into operation.
12. Check the current draw on all line voltage components and match with serial tag.
13. Verify that the scroll compressor is rotating in the proper direction.
14. Check for unusual noises and vibration.
15. Check all refrigerant and fluid lines for leaks.
16. Test all functions of your unit for proper operation.
17. Close high voltage dead front cover and latch.
18. Close front accent panel and latch.
Return completed start-up form to:
Liebert Corporation
Warranty Registration
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
!
WARNING
Potentially lethal voltages exist within this equipment during operation. Observe all cautions
and warnings on unit and in this manual. Failure to do so could result in serious injury or
death. Only qualified service and maintenance personnel should work with this equipment.
!
CAUTION
The scroll compressor must rotate in the proper direction. Rotation in the wrong direction
will result in poor performance and compressor damage.