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La Marche A77 Installation And Operation Manual

Manual is about: A77 Series Microprocessor Controlled SCR Filtered/Battery Eliminator Filtered Charger

Summary of A77

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    I this manual is subject to change without notice. You may obtain the newest version of the manual at www.Lamarchemfg.Com 106 bradrock dr. Des plaines, il 60018-1967 cpn 129767 instruction drawing number: p25-la77-1 tel: 847 299 1188 fax: 847 299 3061 revision a02 rev. Date: 08/15 ecn: 20924 install...

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    I important safety instructions before using this equipment read all manuals and other documents related to this unit and other equipment connected to this unit. Always have a copy of a units manual on file nearby, in a safe place; if a replacement copy of a manual is needed it can be found at the w...

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    Ii unit location  allow at least 6 inches of free air on all vented surfaces for proper cooling  allow sufficient clearance to open the front panel for servicing.  do not operate this unit in a closed-in area or restrict ventilation in any way.  do not set any battery on top of this unit.  neve...

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    Iii table of contents important safety instructions ...................................................................................................................... I electrical safety ................................................................................................................

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    Iv 2 operation ......................................................................................................................................... 19 2.1 starting the a77 ........................................................................................................................ 19...

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    V 5 data logging .................................................................................................................................... 29 5.1 events only logging .................................................................................................................. 29 5.2 i...

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    1 table of figures figure 1 - keyhole slot used ....................................................................................................................... 4 figure 2 - 10 enclosure bolt pattern ................................................................................................

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    2 model scope/general description the la marche models a77d and a77de are scr battery chargers. These models are designed with a lcd digital display. The a77de is designed as a battery eliminator and can be operated with or without batteries connected. The la marche model a77 series battery charger ...

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    3 1 installing the a77 1.1 mounting the a77 when mounting the a77 in any configuration, consider the size and weight of the charger. The wall, rack, and/or floor must be able to support the weight of the charger as well as an additional safety factor. Verify the weight of the a77 charger using appen...

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    4 1.1.1 wall-mounting the a77 (10 & 477 only) the 10 & 477 enclosures of the a77 are shipped from the factory with the necessary brackets installed for wall-mounting (the same bracket is used for rear mounting on a 19” relay rack and cannot be removed). The 977 enclosure does not come with wall moun...

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    5 1.1.2 floor-mounting the a77 (all enclosures) floor-mounting the 977, 72n, 46n, 47n & 57 enclosure is standard. If it is desired to floor mount a charger with the 10 or 477 enclosures you will need the floor-mount bracket note: the floor mount bracket adds an additional 3 in (76.2 mm) to the overa...

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    6 1.1.3 rack-mounting the a77 the a77 can be installed in most relay racks with standard eia hole spacing. If a relay rack is needed they are available for purchase from la marche. The 10 & 477 enclosures are shipped from the factory with the necessary brackets installed for rear mounting on a 19” r...

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    7 1.2 changing transformer taps note: this procedure refers only to a77 battery chargers that are rated for 6 to 25 adc. All other a77 battery chargers do not include transformer taps. (special chargers can be ordered upon request.) before wiring ac power to the a77, check the wiring of the power tr...

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    8 1.3 making the ac input connections before making any connections to the a77 ensure that the ac power is off at the main breaker box and that both of the charger’s breakers are off. Check that the source voltage and frequency matches the voltage and frequency listed on the charger nameplate. For c...

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    9 1.4 making the dc output connections before making any of dc output connections make sure you have read and fully understand the dc connection procedure below. Select proper size for the dc wiring from the wire size table on the previous page. If the distance between the charger’s dc output and th...

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    10 1.5 alarms 1.5.1 standard alarms two alarm relays (and 11 alarm leds) are included as a standard feature of the a77. The included alarm relays are a summary alarm and an ac failure alarm. Each alarm includes one set of form c contacts enabling the customer to connect remote annunciators using con...

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    11 the low acv alarm will trigger if the ac voltage to the charger drops below 90% of the nameplate rating for longer than 5 seconds, the green “ ac on ” led will turn flash. There are no alarm contacts associated with this alarm. Under the low acv condition, the charger will continue to operate as ...

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    12 1.5.3 discrete alarm relay board (option 46r) as an optional accessory, la marche offers a discrete alarm relay board. The s2a-198b relay alarm board offers additional customer connection for remote annunciators. The alarm relay board includes two form c contacts for each of these specific alarms...

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    13 1.5.4 alarm connection procedure before making any connections to the a77 ensure that the ac power is off at the main breaker box and that both of the charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output terminals. For alarms in set a (energiz...

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    14 1.6 temperature compensation (option 11w/11y) the natural voltage of a battery changes as a function of temperature change. As the battery temperature rises, the effective voltage of the battery decreases. Without temperature compensation, the battery charger will always produce a set constant ou...

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    15 1.7 enabling load sharing all a77chargers include the load sharing feature. Load sharing allows the customer to parallel with any identical a77 to share a dc load and therefore reduce the strain on each charger. Chargers to be paralleled must be of the same output. In order to load share properly...

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    16 1.7.3 remote equalize procedure when chargers are connected for load sharing, they must also be set up to switch into equalize at the same time. This can be accomplished by using the remote equalize function of the charger. In addition to wiring the load share wire, the chargers’ canbus communica...

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    17 1.8 ground detection the purpose of ground detection is to determine if the battery or loads have become grounded. Ground detection is available on all a77 chargers. If the battery or loads are set up as floating, it is recommended that ground detection be enabled. When ground detection is enable...

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    18 1.9 ac breaker trip on hvsd (option 19t) option 19t uses a shunt trip and an external timer circuit (s2a-412) to trip the ac breaker when the charger goes into a high voltage shutdown alarm state. In order to reset the hvsd alarm the ac and dc breakers must be switched off (opened). To restart th...

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    19 2 operation 2.1 starting the a77 all equipment is shipped from the factory fully checked and adjusted based on the customer order. Do not make any adjustments unless the equipment has been powered-up and the settings have been determined to be incorrect. Check with battery manufacturer for recomm...

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    20 2.2 digital control board the a77 is equipped with a microprocessor controller. This makes the a77 more user friendly and provides new helpful features to the user. After the a77 has completed the startup sequence, the “ac on” and “float” leds should be on and the display should show the output v...

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    21 2.3 selecting the charging mode the a77 has two different settings for dc output voltage, float mode and equalize mode. Float charging mode is used for all normal battery charging needs. The float mode can also be used for battery elimination, which means directly powering the dc load from the a7...

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    22 3 settings menu all equipment is shipped from the factory fully checked and adjusted based on the customer order. Do not make any adjustments unless the equipment has been powered-up and the settings have been determined to be incorrect. If the settings have been determined to be incorrect, adjus...

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    23 >battery cells float voltage 3.3 save/load configuration the a77 enables customers to save and load a configuration file to an installed micro sd card. A saved configuration file can be loaded to multiple a77 chargers to ease set up time if an installation has more than one a77 chargers. The “sav...

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    24 3.4.4 equalize voltage the “equal. Voltage” setting allows the user to adjust the equalize voltage supplied by the charger. Equalize voltage is adjustable by both the total output voltage and volts per cell. To change the equalize voltage select “equal. Voltage” in the “output settings” menu. To ...

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    25 3.4.7 temperature compensation temperature compensation is a standard feature of the a77 charger. Temperature compensation adjusts the output voltage of the charger based on the temperature at the probe. To enable temperature compensation select “temp. Comp.” in the “output settings” menu. Temper...

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    26 3.6.2 alarm delays the alarm delays setting allows the customer to determine the time delay between the alarm condition and alarm indication. If an alarm condition returns to normal before the delay time, the alarm will not indicate. The delay can be changed for ac failure, low voltage, end of di...

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    27 the a77 now includes data logging as a standard feature. The log file is written as a .Csv file. The “data logging” menu allows the user to adjust settings related to data logging. For more information on data logging see section 5 data logging . The “enbl event log” option allows the user to ena...

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    28 4 test menu all equipment is shipped from the factory fully tested and operational. As part of planned maintenance, customers may want to be able to re-test functionality of the alarm leds and relays. The test menu allows the customer to test both the leds on the display card as well as any alarm...

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    29 5 data logging the a77 now includes data logging as a standard feature. The log file is written as a .Csv file format which can be opened using microsoft excel, or any number of free spreadsheet programs. It can even be opened on many modern smartphones. The data logs are written to an included m...

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    30 figure 14 – example events log lamarche mfg. Company a77de event log file created on 01/24/2015 at 16:03:39 charger serial number 000000‐00 firmware p368s0000 date time dcv (v) ls_dcv (v) dca (a) acv (v) ot probe tc probe phase 1 (acv) phase 2 (acv) phase 3 (acv) phase 1 (aca) phase 2 (aca) phase...

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    31 6 reflected harmonics rectification: the standard a77 comes in single and 3-phase versions having a typical total harmonic distortion between 2533% athd. 12-pulse rectification (opt17b) a77 3-phase chargers may optionally be equipped with 12-pulse rectification. 12-pulse rectification provides g...

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    32 7 service all work inside the a77 should be performed by a qualified electrician. La marche is not responsible for any damages caused by an unqualified technician. 7.1 performing routine maintenance in order for the a77 to continue to operate properly it must undergo routine maintenance. The reco...

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    33 7.2 troubleshooting procedure troubleshooting should be performed only by trained service personnel or experienced electricians. Before setting up any complicated testing or jumping to any conclusions, give the charger a general inspection. Check the following: 1. Check dc output cables, connecti...

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    34 7.3 troubleshooting chart symptom possible cause ac breaker trip immediately (high input current) wrong ac input voltage ac input taps on power transformer are incorrectly set incorrect, damaged or loose cable/harness connections dc output too high defective component on heatsink assembly dc brea...

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    35 appendix a: ac draw, heat loss and shipping weight (single phase) model number dc amps ac input current draw @ 100% load watts btu/hr* approx weight (lbs.) 120 (a) 208 (d) 240 (b) 480 (c) 600 (zd) 24 volt systems a77d(e)-6-24v 6 3 2 2 --- --- 27.6 94.2 71 a77d(e)-12- 24v 12 6 3 3 --- --- 55.1 188...

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    36 a77d(e)-16- 130v 16 39 23 20 10 8 367.6 1254.3 212 a77d(e)-20- 130v 20 49 28 24 12 10 459.5 1567.9 235 a77d(e)-25- 130v 25 61 35 31 15 12 574.4 1959.9 255 a77d(e)-30- 130v 30 73 42 37 18 15 689.3 2352.0 300 a77d(e)-35- 130v 35 85 49 43 21 17 804.2 2744.0 432 a77d(e)-40- 130v 40 98 56 49 24 20 919...

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    37 appendix b: ac draw, heat loss and shipping weight (three phase) model number dc amps ac input current draw @ 100% load watts btu/hr* 208 (d) 240 (b) 480 (c) 600 (zd) approx weight (lbs.) 24v syste m s a77d(e)-75-24v 75 11 9 5 4 217.0 740.4 330 a77d(e)-100-24v 100 14 12 6 5 289.3 987.1 475 a77d(e...

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    38 *btu/hr assumes 90% efficiency at 100% load appendix c: default low dc current alarm threshold the a77 charger uses a shunt to measure dc output current. To prevent undue heating and other concerns, the shunt is sized at a larger current rating then the charger output. The default low current ala...

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    39 appendix d: manufacturer’s warranty all la marche manufacturing co. Equipment has been thoroughly tested and found to be in proper operating condition upon shipment from the factory and is warranted to be free from any defect in workmanship and material that may develop within five (5) years from...

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    40 appendix e: document control and revision history part number: 129767 instruction number: p25-la77-1 issue ecn: 20494 – 7/14 20856 – 6/15 20924-8/15.