La MARCHE P25-LMSM-3 Marine High Frequency Battery Charger Instruction Manual

La MARCHE P25-LMSM-3 Marine High Frequency Battery Charger

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 unit’s manual on file nearby in a safe place; if a replacement copy of a manual is needed, it can be found at www.lamarchemfg.com.

Electrical Safety

WARNING: Hazardous Voltages are present at the input of power systems. The output from rectifiers and from batteries may be low in voltage, but can have a very high current capacity that may cause severe or even fatal injury.

When working with any live battery or power system, follow these precautions:

• Never work alone on any live power system, someone should always be close enough to come to your aid
• Remove personal metal items such as rings, bracelets, necklaces, and watches.
• Wear complete eye protection (with side shields) and clothing protection.
• Always wear gloves and use insulated hand tools.

WARNING: Lethal Voltages are present within the power system. Parts inside the unit may still be energized even when the unit has been disconnected from the AC input power. Check with a meter before proceeding. Do not touch any uninsulated parts.

• A licensed electrician should be used in the installation of any unit.
• Always disconnect the unit from the supply, batteries and loads before performing maintenance or cleaning.
• If the unit is hot-swappable, simply remove it from the shelf for any maintenance or cleaning.
• Always assume that an electrical connection is live and check the connection relative to ground.
• Be sure that neither liquids nor any wet material come in contact with any internal components.
• Do not operate this unit outside the input and output ratings listed on the unit nameplate.
• Do not use this unit for any purpose not described in the operation manual.

Mechanical Safety

• This unit or parts of the unit may get very hot during normal operation, use care when working nearby.
• Do not expose equipment to rain or snow. Always install in a clean, dry location.
• Do not operate equipment if it has received a sharp blow, been dropped, or otherwise damaged in any way.
• Do not disassemble this unit. Incorrect re-assembly may result in a risk of electric shock or fire.

Battery Safety
WARNING: Follow all of the battery manufacturer’s safety recommendations when working with or around battery systems. DO NOT smoke or introduce a spark or open flame in the vicinity of a battery. Some batteries generate explosive gases during normal battery operation.

• To reduce risk of arc, connect and disconnect the battery only when the unit is off.
• If it is necessary to remove the battery connections, always remove the grounded terminal from the battery first.
• Remove personal metal items such as rings, bracelets, necklaces, and watches.
• Always wear rubber gloves, safety glasses, and a rubber-lined vest/apron when working near a battery.
• Have plenty of fresh water and soap nearby in case the battery electrolyte contacts skin, clothing, or eyes.
• If the battery electrolyte contacts skin or clothing, wash immediately with soap and water.
• If the electrolyte enters the eye, immediately flood the eye with running cold water for at least ten (10) minutes and seek medical attention immediately.
• Do not drop metal on a battery. A spark or short-circuit could occur and could cause an explosion.

Charger Location

• Allow at least 6 inches of free air on all vented surfaces for proper cooling
• 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.
• Never allow battery electrolyte to drip on this unit when reading the specific gravity or filling the battery.
• Never place this unit directly above a standard flooded battery. Gases from the battery will corrode and damage equipment.
• A sealed maintenance-free or valve-regulated lead acid (VRLA) battery may be placed below this equipment.

Check for Damages
Prior to unpacking the product, note any damage to the shipping container. Unpack the product and inspect the exterior of product for damage. If any damage is observed, contact the carrier immediately. Continue the inspection for any internal damage. In the unlikely event of internal damage, please inform the carrier and contact La Marche for advice on the risk due to any damage before installing the product. Verify that you have all the necessary parts per your order for proper assembly.

CAUTION: Failure to properly file a claim for shipping damages, or provide a copy of the claim to La Marche, may void warranty service for any physical damages reported for repair.

Returns for Service
Save the original shipping container. If the product needs to be returned for service, it should be packaged in its original shipping container. If the original container is damaged/unavailable, make sure the product is packed with at least three inches of shock-absorbing material to prevent shipping damage. La Marche is not responsible for damage caused by improper packaging of returned products.

Inspection Checklist

• Enclosure exterior and interior is not marred or dented.
• There are no visibly damaged components.
• All internal components are secure.
• Printed circuit boards are firmly seated.
• All hardware and connections are tight.
• All wire terminations are secure.
• All items on packing list have been included.

Handling
Equipment can be very heavy with uneven distribution of weight. Use adequate manpower or equipment for handling. Until the equipment is securely mounted, care must be used to prevent equipment from being accidently tipped over or dropped.

MSM General Description
The La Marche model MSM series uses proven High Frequency charging technology that is developed specifically for Marine applications. The MSM unit incorporates power factor correction to achieve high efficiency and wide AC input range. This filtered unit is designed and built to charge VRLA, Flooded Lead Acid, and Nickel Cadmium batteries. To increase the longevity of the batteries and the charger, thermal protection and external temperature compensation is standard on the MSM. Integrated battery charge divider/isolator provides connections for charging up to three independent battery banks simultaneously. The unit is built in a robust, non-corrosive aluminum enclosure that in conjunction with the drip shield and conformal coated boards makes it a perfect solution for Marine applications.

Understanding the Model Number
The MSM model number is coded to describe the charger and the options that are included. Find the model number on the nomenclature nameplate of the charger. Then follow the chart to determine the configuration of your battery charger.

Optional Accessories Included in the Unit
This unit may have been outfitted with a number of optional accessories or option packages. To find out what options this unit has (if any) refer to the very first page of the manual package.

Equipment Handling

Storing the MSM

If the MSM is to be stored for more than a few days after delivery, it should be stored within its shipping container. The location chosen for storage should be within an ambient temperature of -40 to 185° F (-40 to 85° C) with a non-condensing relative humidity of 0 to 95%. Storage should not exceed 2 years due to the limited shelf life of the DC filter capacitors when they are not in service.

Moving the MSM
After careful inspection and upon verification that the MSM is undamaged, identify the enclosure style and weight of the MSM unit. Refer to the table below.

Table 1 – MSM Weights and Dimensions

Output Voltage

|

Ampere Rating

|

AC Input Voltage

| AC Input Draw (100%

load)

|

Case

|

Dimensions (W x D x H)

|

Weight

---|---|---|---|---|---|---

12 VDC

| 10 ADC| 120| 1.5| 201| 9.6″ X 6.1″ X 14.2″| 5
240| 0.8
20 ADC| 120| 3.1| 201| 9.6″ X 6.1″ X 14.2″| 5
240| 1.6
30 ADC| 120| 4.6| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 2.4
40 ADC| 120| 6| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 3.2
60 ADC| 120| 9.2| 205| 9.6″ X 9.8″ X 18.3″| 27.7
240| 4.8
80 ADC| 120| 12| 205| 9.6″ X 9.8″ X 18.3″| 27.7
240| 6.4

24 VDC

| 10 ADC| 120| 2.6| 201| 9.6″ X 6.1″ X 14.2″| 5
240| 1.4
20 ADC| 120| 5.2| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 2.7
25 ADC| 120| 6.5| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 3.1
30 ADC| 120| 7.8| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 3.8
35 ADC| 120| 9.1| 203| 9.6″ X 6.1″ X 18.3″| 14
240| 4.4
50 ADC| 120| 13| 205| 9.6″ X 9.8″ X 18.3″| 27.7
240| 6.3
65 ADC| 120| 16.9| 205| 9.6″ X 9.8″ X 18.3″| 27.7
240| 8.2
100 ADC| 120| 26| 207| 13.63″ X 8.57″ X 18.31″| 32.6
240| 12.6

Installation

Mounting
The MSM can be wall mounted using four #10 bolts. Install the MSM using appropriate hardware on the wall.

Figure 1 – MSM Mounting Dimensions for Small Case #201

Electrical Connections
Before beginning any work, ensure that all incoming AC supply and DC load wires are de-energized. Verify that no voltage is present by using a voltmeter at all input and output terminals. The MSM is equipped with screw-type terminals for the output connections. See Figure 5.

Input Connections
Check that the source voltage and frequency match the charger nameplate specifications. Select wire size using Table 2. Before connecting the Battery and/or DC loads, it is recommended to apply AC power and set the configuration for the correct output, see section 3.3 for the configuration instructions. Once the configuration is set, remove AC power to the charger.
NOTE: Feeder breaker should be sized to match the size of the AC protection used in charger.

Table 2 – Wire Size Minimum Requirements

| __

Charger Rating (DC Amps)

| Minimum Wire Size Requirement
---|---|---
AC| DC| Grounding
12 Volt Systems| 10A-12V| #14| #14| #14
20A-12V| #14| #10| #14
30A-12V| #14| #8| #14
40A-12V| #14| #8| #14
60A-12V| #12| #8| #12
80A-12V| #12| #6| #12
24 Volt Systems| 10A-24V| #14| #14| #14
20A-24V| #14| #10| #14
25A-24V| #14| #10| #14
30A-24V| #14| #8| #14
35A-24V| #12| #8| #12
50A-24V| #12| #8| #12
65A-24V| #12| #6| #12
100A-24V| #8| #4| #8

NOTE: All wires specified in the table are rated at 90 °C or 194 °F. These are recommended sizes. All National and Local Codes must be followed.

Output Connections
Built in charge divider/isolator circuitry allows up to three separate battery banks (five banks optional) to be connected to the charger. The charge divider uses one common negative connection for all batteries. The positive cable from each battery should be connected to a separate positive DC output terminal. See Figure 5. Select proper size for the DC wiring from the wire size Table 2 on the previous page. If the distance between the charger’s DC output and the battery/load exceeds 10 feet, use the Power Cable Guide in Appendix C to minimize the voltage drop across the wire distance.

CAUTION: When connecting the DC cables to the battery, be certain the positive terminal of the charger is connected to the positive battery terminal and the negative terminal is connected to the negative battery terminal.

Figure 6 – Typical MSM System Configuration
Shown with Optional 5 Battery Charger Divider

Charger Fail Alarm Connections
The Charger Fail Alarm is included with one set of Form ‘C ‘contacts as a standard feature on the MSM. Charger Fail LED will illuminate solid and Charger Fail contacts will De-Energize when alarm is triggered.

Table 3 – Alarm Relay Information

Customer alarm connections are made by pushing in the wiring to the appropriate terminal. To remove the alarm wire, push a small flathead screwdriver to open the contact point, then pull the wire out and remove the screwdriver. See Figure 7.

Temperature Compensation
Temperature Compensation feature of the MSM adjusts the charger’s output voltage based on the temperature read by the external temperature probe. As a standard, the unit includes a 24-foot long temperature probe. For a longer temperature probe, the MSM is offered with an optional 100-foot long probe (Option 11Y).

External Probe Connection Procedure
Before making any connections to the MSM, ensure that the AC power to the unit is off. Disconnect the battery from the charger via the battery disconnect breaker or by manually disconnecting the battery cables. Verify that no voltage is present by using a voltmeter at all input and output terminals.
For the most accurate temperature compensation charging, connect and secure the ring lug of the temperature probe directly on the negative battery terminal. The lug of the probe is electrically isolated from the compensation circuitry in the MSM unit, so the battery voltage will not affect the operation of the charger. If it is not possible to mount the probe directly on the negative terminal of the battery, the probe may be mounted and secured in the vicinity of the battery installation per the battery manufacturer’s recommendations.
Caution must be taken when installing the temperature probe wires to the charger as polarity is important. Install the probe wires into the “External Temp. Sensor” terminal at the bottom of the unit. After connecting the probe, enter the configuration menu and assure that “Temperature Compensation” feature has been enabled (for more details, see Section 3.3). To remove the sensor wires, push a small flathead screwdriver to open the contact point, then pull the wire out and remove the screwdriver. See Figure 5.

Operation

All equipment is shipped from the factory fully checked and adjusted to factory default settings. Before connecting the battery check with the battery manufacturer for the correct voltage settings and adjust the configuration accordingly (refer to Section 3.3). Failure to match the charger settings with the connected battery may damage or shorten the life of the battery.

Initial Setup
Before starting up the MSM, check and verify that all connections are correct and are tightened securely. Check that the input voltage and frequency of the power source match the rating on the nameplate of the charger. Apply AC power to the input terminals of the MSM in order to start up the charger.

3-Stage Deep Discharge Battery Algorithm
The MSM uses a 3-stage charging algorithm on deeply discharged batteries. This method protects the battery as well as the charger by using a controlled sequence to limit the output current. Maximum duration for charger to be in stage 1 & 2 is 4 hours. Charger will go into battery fail condition if it doesn’t reach stage 3 of charging within 4 hours.
NOTE: Only MSM model sizes referred to in tables 4 and 5 have the 3-stage deep discharge feature.

First Stage
Output current maintains its first level current limit depending on charger rating for 50 seconds then goes to second level current depending on charger rating for 10 seconds (refer to table 4 below). This charging process continues until output voltage reaches 2.1V (12V charger) or 4.1V (24V charger), which then it will go into the second stage of charging.

Table 4 – First Stage Charging Information

Charger Current Rating| 10A| 20A| 25A| 30A| 35A| 40A| Time
---|---|---|---|---|---|---|---
First Level Current Limit| 1A| 2A| 2A| 3A| 3A| 4A| 50 seconds
Second Level Current Limit| 5A| 10A| 10A| 15A| 15A| 20A| 10 seconds

Second Stage
Output current will rise linearly until reaching the constant current level. This will take an approximate time of 50 seconds. Output will then go to constant current mode, depending on charger rating for 10 seconds (refer to table 5 below). This process continues until output voltage reaches 6.1V (12V charger) or 12.1V (24V charger) which then it will go to the third state of charging.

Table 5 – Second Stage Charging Information

Charger Current Rating| 10A| 20A| 25A| 30A| 35A| 40A| Time
---|---|---|---|---|---|---|---
First Level Current Limit| 1A| 2A| 2A| 3A| 3A| 4A| 50 seconds
Second Level Current Limit| 5A| 10A| 10A| 15A| 15A| 20A| 10 seconds

Third Stage
When output voltage reaches 6.1V (12V charger) or 12.1V (24V charger) the charger current limit is returned to nominal. The charger output voltage will eventually return to nominal float rate.

Front Display and Indicators
Upon powering up the MSM, the LCD will display the unit’s software revision and LEDs will perform a lamp test. After the unit has completed the start-up procedure, the “AC ON” indicator on the front panel will illuminate and the LCD will show the DC output voltage and DC output current readings.

Controls
Up/Down Arrows – The Up and Down arrows are strictly used for navigating through the configuration menu and increasing or decreasing setting values.
Back Button – Pressing the Back button allows the user to navigate to a previous screen or out of the configuration menu.
SET Button – The Set button is used to access the Configuration Mode menu, allow the user to set the charger parameters, and make selections within the menus.
ON/OFF Button – ON/OFF button is used to disable or enable the output of the unit by pushing and holding this button for 2 seconds.

LED Indicators/Alarms
LCD Display – The LCD display shows the output DC voltage and output DC amperage at all times. Charger modes and different alarm conditions will also be displayed should they occur.
Current Limit (Red) – The Current Limit LED will illuminate when the rectifier is operating in a current limit condition (amperage greater than unit output rating).
AC On (Green) – The AC ON LED will illuminate whenever AC voltage is present at the MSM input terminals. AC ON LED will turn off when AC input is out of range (below 95 or above 270VAC).

Charger Fail (Red) – The Charger Fail/Low Current LED will remain lit and the LCD display will read “CHARGER FAIL” with the following charger conditions:

• Charger is not able to regulate the output voltage
• AC input is out of range (below 95 or above 270VAC), LCD will also display “AC OUT OF RANGE”
• DC output is turned off via ON/OFF Button on front panel, LCD display will read “DC OUTPUT OFF”
• Unit ambient temperature exceeds 70°C, LCD will also display “THEMAL SHUTDOWN”

Low Current (Red) – The Charger Fail/Low Current LED will illuminate and continue blinking when the DC current is below 0.25 Amps.

Thermal Derating – With Thermal Derating feature enabled, “THERMAL PROTECTION – OUTPUT DERATED TO 70%” will display on the LCD when the ambient temperature exceeds 50°C.

Thermal Shutdown – “THERMAL SHUTDOWN” will display on the LCD and the unit output will shut off when the ambient temperature exceeds 70°C.
DC Output Off – Message is displayed when the DC output is turned off via the ON/OFF button on front panel.
Communication Error – Message is displayed when communication between the control circuit and the display circuit has been lost.
Rectifier Fail – Message is displayed when there is no charger output.
Cranking Off – Message is displayed when cranking off feature is enabled (disabled by default). With this feature enabled, during engine cranking, the output of the charger will be disabled. The output will stay disabled for 100 seconds. If
Short Circuit – Message is displayed when the output current is greater than 150% of the charger’s nominal output current.
AC Out of Range – Message is displayed when the AC input voltage is out of range.
Battery Fail – Message is displayed if charger is in heavy current limit condition, where output voltage drops below 50% of the voltage rating, for more than 4 hours. Refer to section 3.2 for more information.

Configuration Mode

To enter Configuration Mode, press the SET button. Once in Configuration Mode, use the Up and Down buttons to cycle through the available options and the SET button to choose the highlighted option. See the chart below for the available settings in Configuration Mode. The controller settings will remain stored even in the event of total power failure.

NOTE: On standard MSMs, MODBUS settings do not affect the functionality of the charger.

Setting Charging Mode
Press SET with “CHARGING MODE” selected to change output mode. The asterisk (*) on the display indicates the current setting.

Float charging mode is used for all normal battery charging needs. Equalize mode is used when it is necessary to equalize (or balance) the level of charge across all cells present in the battery. Consult the battery manufacturer for the proper equalize procedures and parameters.
If the charger is in Equalize mode, it will automatically switch back to Float mode after the designated equalize time. the charger can manually be switched to float mode by selecting FLOAT MODE in the CHARGING MODE submenu.

Setting Battery Type
Press SET with “BATTERY TYPE” selected to change the battery type being used. The asterisk (*) on the display indicates the current setting.

Refer to the table below for default battery voltage settings. Please confirm with battery manufacturer.
NOTE: HCAPs may be used with the MSM battery charger. When charging HCAP-28.8V-9000F-900, the MSM unit float output voltage should be set at 28VDC. Refer to Section 3.4.3 for changing the float output voltage.

Table 6 – Recommended Voltage Settings

for 24V units
VRLA/AGM/Gel| 13.5V for 12V units 27V for 24V units| 13.6V for 12V units 27.3V for 24V units
NiCad| 12.6V for 12V units 26.6V for 24V units| 13.9V for 12V units 29.0V for 24V units

Setting Float Voltage
Press SET with “FLOAT VOLTAGE” selected to change the Float voltage.

The setting adjusts in increments/decrements of 0.1V. The output voltage setting range for 12V units is 10.5V – 14.1V, with a default value of 13.5V. The output voltage setting range for 24V units is 21 – 28.2V, with a default value of 27.2V. Press the SET button to save the setting. The charger will return to the Configuration Mode menu.

Setting Equalize Voltage
Press SET with “EQUALIZE MODE” selected to access the equalize settings. While in “EQUALIZE MODE”, press SET with “EQUALIZE VOLT” selected to change the Equalize voltage.

The setting adjusts in increments/decrements of 0.1V. The output voltage setting range for 12V units is 13V – 14.5V, with a default value of 14.1V. The output voltage setting range for 24V units is 26 – 29V, with a default value of 28.2V. Press the SET button to save the setting. The charger will return to the Configuration Mode menu.

Setting Equalize Timer
While in the “EQUALIZE MODE” menu, press SET with “EQUALIZE TIMER” selected in order to change the Equalize timer.

The Equalize Timer setting changes the amount of time that the charger remains in Equalize charging cycle once activated. When an equalize cycle is started, the charger will remain in Equalize Mode until the time selected by this setting has passed. The equalize timer can be set between 1-24 hours, in 1-hour increments. By default, the Equalize timer is set for 8 hours. Press the SET button to save the setting. The charger will return to the “EQUALIZE MODE” menu.

Setting Equalize Cycle
While in the “EQ MODE” menu, press SET with “EQUALIZE CYCLE” selected in order to change the equalize cycle. The asterisk (*) on the display indicates the current setting.

The Equalize Cycle determines when the charger will go into an Equalize charging. The cycles are “MANUAL”, “7 DAYS” and “30 DAYS”. The asterisk (*) on the display indicates the current setting. The default setting for the equalize cycle is MANUAL. Press the SET button to save the setting. Press BACK to return to the Configuration Mode menu.

Setting Current Limit
Press SET with “SET CURR. LIMIT” selected to change the maximum charging current of the MSM battery charger.

Pressing the UP button will increment the current limit by 1%. Pressing the DOWN button will decrement the current limit by 1%. The range for the battery current limit is 50 – 100%. The default value is 100%. Please consult the battery manufacturer for the maximum charging current of the connected batteries. Press the SET button to save the setting. The charger will return to the Configuration Mode menu.

AC Mains Voltage
Press SET with “MAINS VOLTAGE” selected to view the voltage from the AC mains. The Mains Voltage is not a setting; it is simply a way to view the AC Voltage present to the MSM. Press BACK to return to the configuration menu.

Thermal Derating
Press SET with “THERM.DERATING” selected to enable/disable Thermal Derating feature. The asterisk (*) on the display indicates the current setting.

When enabled, the unit will monitor the charger’s temperature. If the ambient temperature exceeds 50°C, it will lower the current limit to 70% in order to prevent the charger from overheating. LCD will display scrolling message “THERMAL PROTECTION – OUTPUT DERRATED TO 70%”. When the ambient temperature returns below 50°C, the current limit will return to the previously set value. When “Therm. Derating” is disabled, the unit will provide maximum required output regardless of ambient temperature.
Additionally, all chargers are equipped with a thermal shutdown function which cannot be disabled. If the ambient temperature exceeds 70°C, the DC output will shut off. LCD will display “THERMAL SHUTDOWN” and “CHARGER FAIL”. The charger will continue to monitor the ambient temperature, when the temperature returns to a safe level of 40°C, the output will be restored.
To turn on temperature derating, move the arrow in front of the “ENABLE” selection and press SET. To turn off thermal derating, move the arrow in front of the “DISABLE” selection and press SET.

Temperature Compensation
Press SET with “TEMP. COMP.” selected to set Temperature Compensation. The asterisk (*) on the display indicates the current setting.

When enabled the output voltage will change dynamically in respect to the external temperature probe of the MSM. The MSM compensates at 3mV per cell of every °C change. To turn on temperature compensation, move the arrow in front of the “ENABLE” selection and press SET. To turn off temperature compensation, move the arrow in front of the “DISABLE” selection and press SET.

Low Current Alarm
Press SET with “LOW CURR. ALARM” selected to enable/disable the Low Current alarm. The asterisk (*) on the display indicates the current setting.

When enabled, the Low Current alarm will be activated when the DC current is below 0.25 Amps. The Low Current alarm shares the same LED as the Charger Fail Alarm. In the case of Low Current, the LED will blink. To turn on Low Current alarm, move the arrow in front of the “ENABLE” selection and press SET. To turn off Low Current alarm, move the arrow in front of the “DISABLE” selection and press SET.

Cranking Off
Press SET with “CRANKING OFF” selected to enable/disable (disabled by default) the Auto DC Output feature. The asterisk (*) on the display indicates the current setting.

With this feature enabled, during engine cranking, the output of the charger will be disabled. The output will stay disabled for 100 seconds. The message “CRANKING OFF” will appear on the LCD screen. However, the alarm LED and the relay contacts will not be triggered. The cranking off feature is activated after the unit ramps up.

Default Setting
Press SET with “DEFAULT SETTING” selected to reset the controller settings to default. The control will ask to verify the reset settings. Press SET to reset the settings or BACK to exit and cancel the change.

Password Setting
Press SET with “PASSWORD SETT.” selected to enable/disable the password feature. The asterisk (*) on the display indicates the current setting.

The “PASSWORD SETT.” menu allows the user to set a password to enter Configuration Mode. By default, the password is disabled. To enable the menu password, scroll to “PASSWORD SETT.”, press the SET button, then select ENABLE. Set password to desired four-digit pin. Make sure to save this new number as it will be necessary to access the menu after enabling the security feature.
NOTE: If a password is set, no changes can be made within this menu without knowing the password. In case the password is forgotten or lost, consult factory for password reset.

Service

All work inside the MSM should be performed by a qualified electrician. La Marche is not responsible for any damages caused by an unqualified technician.

Before working inside the MSM, ensure that the AC power is off at the main breaker box. Disconnect the battery from the charger via the battery disconnect breaker or manually disconnect the battery cables. Verify that no voltage is present by using a voltmeter at all input and output terminals.

Performing Routine Maintenance
Although very little maintenance is required with the MSM charger, routine checks and adjustments are recommended to ensure optimum system performance.

Yearly

1. Confirm air vents are open.
2. Confirm fans are functioning.
3. Check front panel meters and LEDs for accuracy.

Troubleshooting Procedure

Troubleshooting should be performed only by trained service personnel or experienced electricians. Before setting up any complicated testing, give the unit a general inspection.

Check the following:

1. Check DC output cables, connections, battery type, and number of cells against the unit’s rating.
2. Check unit specifications against customer order.
3. Check input connections, input voltage and feeder breaker/fuse
4. Check any internal wiring, fuses, and breakers.
5. Check for shipping damage, loose connections, broken wires, etc.
6. Certain failures can be caused by defective batteries; make sure batteries are free from defects.

When calling in for a service inquiry or for troubleshooting assistance, be sure to have all of the following information on hand:

1. Equipment model number and serial number.
2. The actual AC input voltage.
3. The DC output voltage with and without the battery.
4. Result of the check of the AC and DC fuses/ breakers.
5. The actual DC output current and voltage, measured with battery and load connected to charger.
   NOTE: When ordering replacement parts, drawings, or schematics, always give model number and serial number.

Appendix A: MSM Specifications

ELECTRICAL

AC Input| Voltage range: 102 – 264VAC
Frequency Range: 45-65Hz
DC Output| 10 – 80A @ 12VDC
10 – 100A @ 24VDC
Output Filtering| Suitable for Valve-Regulated batteries
Regulation| ± 0.5% from no load to full load over the specified input voltage, frequency and ambient temperature range.
Meters| Digital DC Ammeter & DC Voltmeter ± 1% Accuracy
AC Input Voltmeter
PROTECTION
Current Walk- In| The output current will gradually increase after the charger is turned on, eliminating surges and overshoot
Current Limit| DC Current limiting. Adjustable from 50 to 100% of rated output current.
Input/ Output| Standard AC and DC fuse with surge protection
| Reverse Current Polarity
| Short circuit protection
Environmental| Thermal Protection
Emergency Restoration| The battery charger may be connected to a battery which is heavily discharged and recharge it without clearing any protective devices.
ENVIROMENTAL
Audible Noise| Less than 65dBA at any point 5 feet from any vertical surface
Operating Temperature| -4 to 122˚F (-20 to 50˚C)
Storage Temperature| -40 to 185°F (-40 to 85°C)
Relative Humidity| 0 to 95% (non-condensing)
Cooling| Fan-Assisted

Shock

| The battery charger in its shipping container withstands shock developed when one edge of the container is dropped six inches while the opposite edge is resting on the ground, or it is dropped two inches without any physical damage or degradation of the electrical performance.
Vibration| The battery charger in its shipping container withstands vibration encountered in shipping without physical damage or degradation of the electrical performance.
Altitude| This battery charger is capable of operation at altitudes up to 3,000 feet at an ambient temperature of up to +40°C.
Ventilation| The unit should be mounted so that ventilating openings are not blocked and air entering the cabinet does not exceed 50°C (122°F).

Appendix B: MSM Current Draw, Heat loss, and Case Size

| ****

MSM Model Number

| DC

Output

| AC Input Current Draw @ 100% Load| ****

Watts In

| ****

Watts Out

| ****

Watts Lost

| ****

BTU/Hr. *****

| ****

Case No.

| ****

Weight (lbs)

---|---|---|---|---|---|---|---|---|---
Amps| 120

Vac

| 240

Vac

| Fuse Size
12 Volt Systems| 10-12V| 10| 1.5| 0.8| 15.0| 153.2| 130.2| 23.0| 79| 201| 5
20-12V| 20| 3.1| 1.6| 15.0| 306.4| 260.4| 46.0| 157| 201| 5
30-12V| 30| 4.6| 2.4| 15.0| 459.5| 390.6| 68.9| 236| 203| 11
40-12V| 40| 6.0| 3.2| 15.0| 612.7| 520.8| 91.9| 314| 203| 11
60-12V| 60| 9.2| 4.8| 15.0| 919.1| 781.2| 137.9| 471| 205| 18
80-12V| 80| 12.0| 6.4| 20.0| 1225.4| 1041.6| 183.8| 628| 205| 18
24 Volt Systems| 10-24V| 10| 2.6| 1.4| 15.0| 306.4| 260.4| 46.0| 157| 201| 5
20-24V| 20| 5.2| 2.7| 15.0| 612.7| 520.8| 91.9| 314| 203| 11
25-24V| 25| 6.5| 3.1| 15.0| 765.9| 651.0| 114.9| 393| 203| 11
30-24V| 30| 7.8| 3.8| 15.0| 919.1| 781.2| 137.9| 471| 203| 11
35-24V| 35| 9.1| 4.4| 15.0| 1072.2| 911.4| 160.8| 550| 203| 11
50-24V| 50| 13.0| 6.3| 20.0| 1531.8| 1302.0| 229.8| 785| 205| 18
65-24V| 65| 16.9| 8.2| 20.0| 1991.3| 1692.6| 298.7| 1020| 205| 18
100-24V| 100| 26.0| 12.8| 40| 3063.7| 2604.0| 459.7| 1570| 207| 32.6

BTU/Hr assumes 85% efficiency at 100% load

Appendix C: Power Cabling Guide
Use the following formulas and table to determine proper wire size for minimal voltage drop. At distances exceeding 10 feet, the DC wire size should be chosen to keep the voltage difference between the units DC output terminals and the battery at less than 1/2 volt when unit is fully loaded.

Table of Conventions

SIZE (AWG)| AREA CIR.MILS| SIZE (MCM)| AREA CIR.MILS
---|---|---|---
18| 1620| 250| 250000
16| 2580| 300| 300000
14| 4110| 350| 350000
12| 6530| 400| 400000
10| 10380| 500| 500000
8| 16510| 600| 600000
6| 26240| 700| 700000
4| 41740| 750| 750000
3| 52620| 800| 800000
2| 66360| 900| 900000
1| 83690| 1000| 1000000
0| 105600| 1250| 1250000
00| 133100| 1500| 1500000
000| 167800| 1750| 1750000
0000| 211600| 2000| 2000000

CMA = Cross section of wire in circular MIL area
A = Ultimate drain in amperes
LF = Conductor loop feet
MaxAmp = Max. allowable amperes for given voltage drop
AVD = Allowable voltage drop
K = 11.1 for commercial (TW) copper wire
= 7.4 for aluminum

Calculating Wire Size Requirements

Calculating Current Carrying Capacity of Wire

Example: If the charger being used has a max ampere output of 33A, and 30 loop feet of copper wire cable is required with an allowable voltage drop of 0.5Volts, the wire size calculation will be.

A= 30
LF= 30
K= 11.1
AV= 0.5

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 two (2) years from date of purchase.
Any part or parts of the equipment (except fuses, DC connectors and other wear-related items) that prove defective within a two (2) year period shall be replaced without charge providing such defect, in our opinion, is due to faulty material or workmanship and not caused by tampering, abuse, misapplication or improper installation.
Should a piece of equipment require repair during the warranty period, the equipment can be returned to the La Marche factory to have the inspection, parts replacements and testing performed by factory personnel. Should it be necessary to return a piece of equipment or parts to the factory, the customer or sales representative must obtain authorization from the factory. If upon inspection at the factory, the defect was due to faulty material or workmanship, all repairs will be made at no cost to the customer during the first three years. Transportation charges or duties shall be borne by purchaser.
In accepting delivery of the equipment, the purchaser assumes full responsibility for proper installation, installation adjustments and service arrangements. Should minor adjustments be required, the local La Marche sales representative should be contacted to provide this service only.
All sales are final. Only standard La Marche chargers will be considered for return. A 25% restocking fee is charged when return is factory authorized. Special chargers are not returnable.
In no event shall La Marche Manufacturing Co. have any liability for consequential damages, or loss, damage or expense directly or indirectly arising from the use of the products, or any inability to use them either separately or in combination with other equipment or materials, or from any other cause. In addition, any alterations of equipment made by anyone other than La Marche Manufacturing Co. renders this warranty null and void.
La Marche Manufacturing Co. reserves the right to make revisions in current production of equipment, and assumes no obligation to incorporate these revisions in earlier models.
The failure of La Marche Manufacturing Co. to object to provisions contained in customers’ purchase orders or other communications shall not be deemed a waiver of the terms or conditions hereof, nor acceptance of such provisions.
The above warranty is exclusive, supersedes and is in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or fitness. No person, agent or dealer is authorized to give any warranties on behalf of the Manufacturer, nor to assume for the Manufacturer any other liability in connection with any of its products unless made in writing and signed by an official of the manufacturer.

Appendix E: Document Control and Revision History

Part Number: 136069
Instruction Number: P25-LMSM-3
Issue ECN: 21428 / 04-17

References

• La MARCHE - The Powerful Advantage
• La MARCHE - The Powerful Advantage

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