Vertiv Liebert DSE Packaged 400, Инструкция по установке и эксплуатации

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3. Insert a spray nozzle on the end of a suitable extension and apply the water/cleaning solution, working back
and forth across the coil face.
The solution pushes dirt and debris out the bottom of the coil.
• If you are using a cleaner along with the spraying process, follow recommended manufacturer
instructions and be sure to rinse the coil thoroughly. Any residue left on the coil can act as a magnet to
dirt.
4. Reinstall the cleaning window and reconnect the power supply to the condenser.
5. Coils will possibly retain water after cleaning and rinsing, so manually reverse the fans briefly using condenser
controls to speed drying of the coils and prevent a possible high-head-pressure condition when the condenser
is put back into service.
NOTE: Spraying the coil from the outside repeatedly can push a majority of the dirt to the inner section of the fins and
continue to restrict air flow. Keep in mind you may not have the luxury of shutting the unit down for an extended time.
A scheduled shutdown with the operator may be in order.
8.7.4 Cleaning the Condenser Fan
• Clean the EC fan with water only when temperatures are greater than 50°F (10°C)
• Make sure that no water gets into the inside of the motor.
• Do not hold the jet spray directly on the motor openings and seals.
• During cleaning work using a jet spray, no guarantee is assumed regarding corrosion formation/paint adhesion
for unpainted/painted fans.
8.8 Replacing the Condenser Fan
WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the electric control enclosure. Failure to comply can
cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC and local codes, as
applicable. Before proceeding with installation, read all instructions, verify that all the parts are included and
check the nameplate to be sure the voltage matches available utility power. The Liebert® controller does not
isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive
power even during the “Unit Off” mode of the controller. The factory-supplied disconnect switch is on the
exterior of the enclosure. The factory-supplied, optional disconnect switch is inside the unit. The line side of
this switch contains live high-voltage. The only way to ensure that there is NO voltage inside the unit is to
install and open a remote disconnect switch. Refer to unit electrical schematic. Follow all local codes.
WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power
supply disconnect switches and verify with a voltmeter that power is off before working within the fan-motor
electric-connection enclosures. Fan-motor controls can maintain an electric charge for 10 minutes after
power is disconnected. Wait 10 minutes after power is verified as off before working within the fan electric
control/connection enclosures. Use only fully-trained and qualified HVAC technicians to perform
maintenance on the fans.
8 Maintenance
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