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Air conditioning systems !!Air conditioning systems

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    Air conditioning systems !!Air conditioning systems

    REFERENCE 03-059/MSG-186 - Page 71
    AIR CONDITIONING SYSTEMS
    AIR CONDITIONING SYSTEMS
    Boeing estimates that the first production ICU with splashguards and retrofit instructions will become available
    by the third quarter of 2003.
    Item LRU Name LRU PN Vendor Aircraft ATA From
    82 Trim Air PRSOV 810229-4
    810229-5
    Hamilton Sundstrand B777-200 21-62 AAR
    At Asiana, we have reviewed our PIREP data for ATA 21 of the B777-200. About 80% (21 out of 27) are due to
    the status message “TRIM AIR PRSOV L/R” indication. Most of EICAS messages had been cleared by Air-on
    GRD test on the MAT, or replacement of subject valves in accordance with 777MT 21-001R5. This states that
    Hamilton SB 810200-21-02/-08 is recommended to reduce Trim Air PRSOV anomalies. We have 810229-4/-5
    valves, and the current software level is CTC OPS 2103-HAM-205-CO. This means that those two SBs are not
    applicable to our valves.
    However, we still have status message “TRIM AIR PRSOV L/R.”
    Even after incorporation of the SBs, is there any other operator having the same status message indication and
    problem?
    Do Boeing and Hamilton Sundstrand have any solutions to clear this?
    For unconfirmed PRSOVs, we would like Hamilton Sundstrand and Boeing to consider reimbursing the NFF fees.
    Other operator and vendor comments, please.
    COST PENALTY: $50,000
    STORY/DELTA - Delta also has software CTC OPS 2103-HAM-205-CO on aircraft 7001-7007. Delta has -3, -4,
    and -5 PRSOVs. We experienced 8 PIREPS in 2002 of the EICAS status message “Trim Air PRSOV L/R”
    resulting in removal of PRSOVs.
    SEABACK/HAMILTON SUNDSTRAND - Numerous airlines operating B777 are experiencing EICAS status
    message “Trim Air PRSOV L/R” indications. These status messages are occurring in Taxi Out or Engine Start
    mode prior to departure. The Trim Air System is automatically tested at that time by aircraft software to
    determine the health of the components.
    Hamilton Sundstrand’s investigation to date has revealed that most Trim PRSOV valves returned for this
    EICAS message were identified as NFF. Hamilton Sundstrand has investigated several removed valves in our
    test lab under hot airflow conditions. Our investigation to date has not revealed any specific problems with the
    Trim PRSOV valve. We have visited two airlines to perform on-wing investigations, and that data suggests a
    possible aircraft system issue. As a result, a Boeing, Honeywell, and Hamilton Sundstrand team was formed
    to investigate the aircraft systems and determine the root cause.
    Due to the fleet wide nature of the problem, Boeing has classified the issue as a Service Related Problem
    (SRP). In the interim of a root cause determination, Boeing has issued Maintenance Tip 777 21-001 R4 to
    advise airlines to consider the status message a nuisance when indicated on the ground after engine start.
    Airlines can select Air Conditioning Reset to clear the message.
    The Boeing-Honeywell-Hamilton team has subsequently visited two airlines using special investigation
    hardware/software on chronic aircraft to determine the root cause of the messages. Data was collected and is
    currently under review by Boeing. Additionally, an Airline Modifiable Information (AMI) software program was
    developed by Boeing to record data during these events in real time. The AMI software has been delivered to
    two airlines and installation is pending. The investigation is expected to be completed by end of June 2003.
    Airlines will not be charged for PN 810229-5 L2/4-6 Trim PRSOVs that test NFF while the valve is within the
    REFERENCE 03-059/MSG-186 - Page 74

    AIR CONDITIONING SYSTEMS
    Technical Publications, including GSE drawings where applicable, can also be requested on-line, at:
    https://pubs.cas.honeywell.com
    http://www.arinc.com/amc/reports/200...ng_systems.pdf


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    حسن هادي
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    Window Air Conditioning
    Units–High Efficiency
    Heating, Ventilation, and Air
    Conditioning
    Description:
    Window air conditioning units
    are small, single-packaged units designed to
    be mounted in the space of an open window
    and plugged into a conventional electrical
    receptacle. They provide cooling to a single
    space up to 1,000 square feet in area. Highefficiency
    models are constructed with highly efficient compressors and
    fan motors, improved heat transfer materials, and better controls than
    standard models. As a result, they perform 15-20 percent more efficiently
    than commercially available standard models. Air-source heat pumps are
    available in the same window-mounted configuration.
    While the term “high efficiency” is not a strictly defined term, for the
    purposes of this Technology Profile it is used to denote units that meet
    Energy Star energy efficiency thresholds, which also meet FEMP recommendations
    for minimum performance.

    Applications:
    Window air conditioning units can be used to cool virtually
    any space having operable windows. Such units have the benefit of being able
    to be purchased individually rather than having to finance a large system at
    one time. They have lower installation costs than larger air conditioning
    equipment that is permanently installed with piping, wiring, and ductwork.
    Window units provide individual cooling control to the occupants of each room.
    If one fails, the rest of the spaces in the building are not affected, and the unit
    can often be replaced quickly. The drawbacks of such equipment may be higher
    capital cost, lower energy efficiency, and considerably more noise in the cooled
    space than a central air conditioning system would produce. They are generally
    inadequate to provide cooling to a room larger than 1,000 square feet or one with a
    substantial internal heat load such as a conference room.
    Window air conditioners, like large air conditioning systems, should be sized for the
    area to be cooled. Air conditioners remove heat as well as humidity from the air. If
    the unit is too large, it will cool the room quickly, but only remove a portion of the
    humidity, leaving the room with a damp, clammy feeling. To completely cool a
    room, running a smaller unit for a longer time will use less energy than running a
    larger unit for a shorter time. While a full heat-load calculation is best, the table below
    can be used to approximate the size of air conditioner to use.

    Energy Efficiency
    Energy Resources for Schools Factsheet
    2
    Performance/Costs:
    Minimum equipment performance standards are set by the National Appliance Energy
    Conservation Act (NAECA). The standard varies depending on the size and configuration of the air conditioner.
    FEMP also has recommendations for minimum efficiencies, depending on size. Units exceeding minimum
    standards for energy consumption by at least 15% are eligible for the Energy Star label. More efficient
    units should operate more quietly.
    Energy Efficiency Ratio (EER) is defined as the ratio of the cooling capacity of the air conditioner (in British
    thermal units—Btu—per hour) to the total electrical input (in watts) under ARI-specified test conditions. Average
    running time for a window air conditioner varies with climate and type of use.

    Example:
    A 5,500 Btu/hr unit serving a 200-square foot office space, operating 600 hours per year.
    A unit that meets NAECA standards would have an EER of 8.0 and would draw 688 watts (5500/8), while an
    Energy Star-certified window air conditioner with an EER of 10.0 would draw 550 watts (5500/10). Over a full
    year, the energy savings of the Energy Star-certified unit would be 82.8 kWh (138 watts x 600 hours / 1000
    watts/kWh).
    Costs for window air conditioners vary with style and mounting characteristics. One manufacturer lists a 8,000
    Btu/hr cooling unit (window mounting only, EER 9.2) for $309, a more stylish 8,400 Btu/hr window or
    through-the-wall unit (EER 9.2) for $429, or a 8,600 Btu/hr unit (window mounting only, EER 10.0) for $329.
    Local market conditions will also affect prices between models.

    Availability:
    Compare several manufacturers and models and look for the Energy Star certification for high
    efficiency. Energy Star-certified air conditioners are available at most appliance retailers.

    For Additional Information:
    Energy Star Room Air Conditioners
    Energy Star Appliance Program on-line database
    http://www.energystar.gov/products/roomair/index.html
    Room Air Conditioner Recommendation
    This FEMP site includes information on where to find energy-efficient room air conditioners, a cost-effectiveness
    example, buyer tips, and a database of complying models.
    http://www.eren.doe.gov/femp/procurement/rac.html
    Database of High-Efficiency Room Air Conditioners
    A California Energy Commission database of manufacturers and models
    http://www.energy.ca.gov/efficiency/...ir/ROOMAIR.HTM
    Top-Rated Energy-Efficient Appliances—Room Air Conditioners
    A listing from the American Council for an Energy-Efficient Economy
    http://aceee.org/consumerguide/toprac.htm
    © 2003 Washington State University Cooperative
    Extension Energy Program. This publication
    contains material written and produced for public
    distribution. You may reprint this written material,
    provided you do not use it to endorse a commercial
    product. Please reference by title and credit
    Washington State University Cooperative Extension
    Energy Program. WSUCEEP00-144
    Credit: Photo courtesy of Carrier corporation
    http://www.energy.wsu.edu/ftp-ep/pub...s/air_cond.pdf
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  3. [3]
    حسن هادي
    حسن هادي غير متواجد حالياً
    عضو متميز
    الصورة الرمزية حسن هادي


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    COOPERATIVE
    EXTENSION PROGRAM
    C
    OOPERATIVE EXTENSION PROGRAM . FORT VALLEY STATE UNIVERSITY

    C
    OLLEGE OF AGRICULTURE, HOME ECONOMICS, AND ALLIED PROGRAMS (912) 825-6345

    FVSu -C 1
    O
    ne good way to reduce
    your utility bill is to make
    sure your air conditioning
    system receives proper maintenance.
    It’s a good investment to
    have your air conditioner thoroughly
    serviced by a professional
    each year. The service representative
    should check the condenser
    coils, the evaporator coils, the
    blower wheel, the filter, the freon
    charge, the lubrication and pulleys,
    the controls, and the electrical
    contacts. If any of the equipment
    is dirty or worn out, it should
    be cleaned or replaced.

    Filters trap lint or dust
    You should check your filter
    at least once a month and change
    it if it’s dirty. Clean filters trap lint
    and dust, preventing your inside
    coils from becoming clogged.
    A blower wheel that’s covered with lint and dust
    will put out fifteen to twenty percent less air. A dirty
    blower wheel also usually indicates dirty inside coils.
    Inspect ducts regularly
    Duct leaks can cost you a lot of money. A
    supply side leak means that conditioned air is going
    outside, while a leak on the return side causes hot,
    unfiltered attic air to be drawn into the air conditioner.
    This puts an extra load on the unit and fouls up the
    coils. You should inspect ducts regularly for leaks
    and repair them with high quality
    material. If insulation is skimpy,
    add more.
    Your service representative
    should adjust your freon charge
    to the manufacturer’s specifications
    to reduce energy
    consumption and insure proper
    performance by the unit.
    In addition to annual servicing,
    there are other things you
    can do to make sure your air
    conditioner functions properly.
    Control plant foliage…
    Keep plant foliage trimmed
    back two feet on each side of your
    outside unit, and at least five feet
    from the top. Plant foliage restricts
    air circulation through the outside
    coils.
    Cut the grass around the
    outside unit when your air conditioner is turned off,
    make sure that the mower throws the grass
    clippings away from the coils.
    Check your clothes dryer vents, making sure
    that they don’t exhaust directly into the outside coils.
    You should provide an extension for the vent to
    direct exhaust air away from the outside unit. Lint
    stops up the outside coils and the hot air reduces
    its efficiency.
    For more information on air conditioning maintenance,
    contact your local county Extension office.
    Air Conditioning Maintenance
    Stopped-up coils
    can lower
    efficiency, shorten
    the life of the
    compressor and
    increase your
    energy bill.
    Check the filters at least once every month.
    http://www.ag.fvsu.edu/teletips/pdf/energy/475.pdf
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    حسن هادي
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    http://sturgeon.apcc.com/techref.nsf...0-1156B-EN.pdf
    ************************************************** ********************************
    CM Series
    Precision Air Conditioning
    This manual provides information for installation, operation and preventive
    maintenance. The user should observe the guidelines and procedures presented herein
    to promote satisfactory performance. D ue to an ongoing program dedicated to product
    improvement, specifications are subject to revision without notice. APC assumes no
    responsibility, and disclaims all liability for damages resulting from use of this
    information or for any errors or omissions.
    American Power Conversion
    132 Fairgrounds Road
    West Kingston, RI 02892
    Telephone: 800-800-4APC
    Website: www.apc.com
    OPERATION AND MAINTENANCE
    MANUAL
    February 10, 2003
    Introduction
    Congratulations on the selection of an APC
    environmental control system. The unit
    incorporates the latest system design
    innovations to provide you with optimum
    efficiency, reliability and control accuracy.
    The CM Series System will provide years of
    trouble free service, provided it is installed
    and maintained by technically qualified
    personnel in accordance with the guidelines
    set forth in this manual.
    Table of *******s
    Introduction .................................................. .................................................. ............................. 1
    The CM Series .................................................. .................................................. ......................... 2
    Standard Features .................................................. .................................................. ................... 3
    Optional Equipment .................................................. .................................................. ................. 4
    Mounting.......................................... .................................................. .......................................... 6
    Installation .................................................. .................................................. ............................... 7
    Piping Connections .................................................. .................................................. .................. 9
    Piping Connections Chart .................................................. .................................................. ........ 10
    System Control........................................... .................................................. ............................... 11
    Pre Start-Up .................................................. .................................................. ............................ 12
    Charging the System .................................................. .................................................. ............... 13
    System Function .................................................. .................................................. ...................... 13
    Control/Safety Adjustments .................................................. .................................................. ..... 14
    Humidifier Operation......................................... .................................................. ......................... 16
    Troubleshooting .................................................. .................................................. ....................... 17
    Preventive Maintenance .................................................. .................................................. .......... 21
    Warranty Procedure......................................... .................................................. .......................... 22
    Sample Warranty.......................................... .................................................. ............................ 23
    The CM Series
    The APC CM series precision air-conditioning
    system offers an increasingly compact, modular,
    and reliable system solution without consuming
    valuable floor space.
    Precision environmental control requirements
    now reach far beyond the confines of the
    traditional data or computer room to encompass
    a larger suite of applications, referred to as
    technology rooms.
    A worldwide network of APC representatives is
    fully qualified to provide engineering, sales,
    installation and service for our products.
    Capacity
    Available are 1 through 5 tons (3.5 kW–17.5
    kW).
    Air Pattern
    The spot-cooled configuration is supplied with a
    2' × 4' (610 mm×1220 mm) supply/return air filter
    assembly. The filter assembly includes one-way
    supply and return air grilles. The duct
    configuration is supplied with a 1" (25 mm) duct
    flange on the supply and return air openings.
    Control
    The thermostat controller activates heating or
    cooling functions automatically in response to
    set-point versus measured conditions.
    Humidifying or dehumidifying cycles activate as
    a function of set point versus measured return
    air conditions.
    Configuration

    Air-cooled.
    Unit used with an air-cooled
    condenser. Refrigerant lines must be run
    between the indoor unit and the condenser. Aircooled
    units require low maintenance and have
    low operating costs.
    Water-cooled.


    Unit used with a cooling tower or
    other source of water. Field refrigeration piping
    is
    eliminated by a factory sealed and tested
    system. Water piping to and from the unit is
    required.
    Glycol-cooled.


    Unit used with a drycooler. The
    need for field refrigeration piping is eliminated by
    a factory sealed and tested system. The glycol
    piping is sealed, eliminating costly water
    treatment often encountered with open
    cooling towers.
    Remote-condensing.


    Unit used with a remote
    air-cooled condensing unit which
    includes the compressor(s). This allows key
    maintenance procedures to be located outside
    the critical
    environment helping eliminate access by
    maintenance personnel in high security areas.
    Available in air, water, and glycol models.
    Chilled water.


    Unit used with building chillers to
    provide economical and reliable control. These
    models often provide the optimum solution for
    large cooling needs due to ease of installation
    and the elimination of multiple
    refrigeration components. They can adapt to
    existing buildings serviced by chillers with
    sufficient capacity.
    Pre-cool.


    Unit designed to reduce operating
    costs during mid to low ambient
    temperatures by integrating an economizer coil
    into the glycol-cooled unit to utilize the outdoor
    ambient cooled glycol assist or completely cool
    the indoor air. Available in 2–5 ton models.
    Serviceability
    The CM Series has removable panels allowing
    full service access to all
    components without removing the unit from the
    ceiling.
    Humidity Control
    Humidity is managed through a self-contained
    steam
    canister humidifier for
    maximum efficiency and ease of maintenance.
    The pure steam canister maintains consistent
    capacity output, and requires very little or no
    scheduled maintenance.
    Compliance
    The CM Series has received agency approvals
    by ETL and MEA #256-94-E (1.5, 2, 3, 5 ton),
    #177-01-E (1, 4 ton). Electrical systems comply
    with NEC and UL 1995 standards.
    3
    Standard Features
    Overall cabinet
    The frame is constructed of heavy gauge steel
    for maximum strength. Hanger mounting
    brackets shall be part of the chassis and shock

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    http://www.eren.doe.gov/femp/procurement/rac.html
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    حسن هادي
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