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Инструкция по эксплуатации Liebert, модель Air Cooled, Direct Drive Condensers 83

Производитель: Liebert
Размер: 2.77 mb
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___ 5. Blank start-up sheet located, ready for completion by installer or start-up technician. 31 Operation 5.0 OPERATION ! WARNING Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working within. Unit contains potentially lethal electrical voltage. Only properly trained and qualified personnel may perform repair, maintenance and cleaning operations. The fans may start unexpectedly. Disconnect power supply before working on unit. Line side of factory disconnect remains energized when disconnect is off. Use a voltmeter to make sure power is turned off before checking any electrical connections or functions. 5.1 Startup Checklist Refer to 4.0 -Checklist for Completed Installation and verify that all installation items have been completed before beginning to start the condenser. 5.2 Startup • Locate “Liebert Condensers and Drycoolers Warranty Inspection Check Sheet” (Document # SAFM-8542-54). • Turn the condenser disconnect ON. Indoor units should be turned on and set for cooling to allow operation of condenser. • Check the fans for proper rotation: Clockwise when viewing the unit from the fan guard (top) side. Check that air is being drawn through the coil and discharged out the fan assembly. Some ambient thermostats may need to be temporarily adjusted to lower temperature settings to observe all fans operate. Readjust thermostat settings to correspond to setpoints shown on the electrical schematic supplied with the unit. • Complete “Liebert Condensers and Drycoolers Warranty Inspection Check Sheet” (Document # SAFM-8542-54). NOTE This document must be completed and forwarded to your local Liebert sales office to validate warranty. • Contact your local Liebert sales representative or Liebert Air Product Support if you have any questions or problems during unit startup and commissioning. • Local Liebert sales offices and Liebert air product support contacts can be found at or by calling 1-800-LIEBERT. 32 System Maintenance 6.0 SYSTEM MAINTENANCE ! WARNING Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working in the unit. Use voltmeter to make sure power is turned Off before making any electrical connections. Unit contains lethal voltage in some circuits. Only properly trained and qualified personnel may perform repair, maintenance and cleaning operations. The fans may start unexpectedly. Disconnect power supply before working on unit. Line side of factory disconnect remains energized when disconnect is off. Use a voltmeter to make sure power is turned off before checking any electrical connections or functions. 6.1 General Procedures NOTE When ordering replacement parts for equipment, it is necessary to specify unit model number, serial number, and voltage. Please record those numbers in the spaces below. • Model Number ____________________________________________________ • Serial Number ____________________________________________________ • Voltage/Phase/Frequency _________________________________________ Periodic attention is necessary for continued satisfactory operation of your unit. Restricted air flow through the condenser coil, reduced airflow from non-functioning fans and low refrigerant system charge levels will reduce the operating efficiency of the unit and can result in high condensing temperatures and loss of cooling. In winter, do not permit snow to accumulate around the sides or underneath the condenser coil. Monthly and semi-annual inspections and maintenance are recommended for proper system operation. Use copies of 6.2.2 - Maintenance Inspection Checklist for each of these inspections. If performance or operation problems are detected at anytime, refer to Table 9 -Troubleshooting for required action. 33 System Maintenance 6.2 Special Procedures 6.2.1 Condenser Cleaning Keeping the outdoor condenser coils clean is an important factor in maintaining peak efficiency, reliability and long life of the equipment. It is much easier to keep up on frequent cleanings rather than wait until heavy build up has occurred which may create head pressure problems with the evaporator units. When to Clean Normal conditions typically dictate cleaning twice a year, spring and fall. On-site or area conditions such as cottonwood trees, construction, etc., can increase cleaning frequency. On your standard monthly preventive maintenance schedule, a visual inspection of the coil is recommended to monitor conditions. What to Use The best overall condenser coil cleaner to use is plain water. If the coil has been maintained and cleaned at regular intervals, water is sufficient to remove dirt and debris from the fins. Heavy build up on the exterior of the fins can be removed with a brush. Water pressure from a garden hose and sprayer usually works well. If a pressure washer is used, make sure the equipment is set to a ...