Lamarche ESCR125 User manual

Installation and Operation Manual
La Marche Manufacturing Company
www.lamarchemfg.com
ESCR125
Industrial Battery Charger
106 Bradrock Dr. Des Plaines 60018-1967 CPN 137791
Tel: [phone] Fax: [phone]
Instruction Drawing Number: P25-LESCR125-1
Revision A00 Rev. Date: 12/17 ECN: 21664

i
Important Safety Instructions
Before using this equipment read all manuals and other documents related to this charger and other equipment
connected to this charger. Always have a copy of a charger’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
chargers 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 systems, 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 charger 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 charger.
Always disconnect the charger from the supply, batteries, and loads before performing maintenance,
replacing parts, 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 charger outside the input and output ratings listed on the charger nameplate.
Do not use this charger for any purpose not described in the operation manual.
Mechanical Safety
This charger or parts of the charger 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 charger. Incorrect re-assembly may result in a risk of electric shock or fire.
If modifications to the enclosure are necessary, such as drilling for conduit fitting, ensure the interior is
protected from metal shavings and debris. Additional precautions should be taken to remove any remaining
debris from interior of charger prior to energizing.
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 charger is off.
If it is necessary to remove 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 or place any materials on a battery. A spark or short-circuit could cause an explosion.

ii
Charger Location
Allow at least 3 inches of free air on all vented surfaces (and external heatsinks) for proper cooling.
Allow sufficient clearance to open the front panel for servicing.
Do not operate this charger in a closed-in area or restrict ventilation in any way.
Do not set any battery on top of this charger.
Never allow battery electrolyte to drip on this charger when reading the specific gravity or filling the battery.
Never place this charger directly above a standard flooded battery. Gases from the battery will corrode and
damage equipment.
Check for Damages
Prior to unpacking the product, note any damage to the shipping container and take pictures. Unpack the
product and inspect the exterior and interior of product for damage. If any damage is observed, take pictures
and contact the carrier immediately to file a damage claim. Contact La Marche for a Return Material
Authorization number to have the charger sent back for evaluation and repair.
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.

iii
Table of Contents
Important Safety Instructions ......................................................................................................................i
Electrical Safety.......................................................................................................................................i
Mechanical Safety....................................................................................................................................i
Battery Safety .........................................................................................................................................i
Charger Location.................................................................................................................................... ii
Check for Damages ..................................................................................Error! Bookmark not defined.
Returns for Service...................................................................................Error! Bookmark not defined.
Inspection Checklist ..............................................................................Error! Bookmark not defined.
Handling..................................................................................................Error! Bookmark not defined.
Table of Contents ..................................................................................................................................... iii
Table of Figures ....................................................................................................................................... iv
Model Scope/General Description ................................................................................................................ v
Understanding the Model Number ...............................................................................................................v
Optional Accessories Included in the Charger ...............................................................................................v
1Installation .........................................................................................................................................1
1.1 Mounting the ESCR125 ................................................................................................................1
1.1.1 Wall Mounting .........................................................................................................................1
1.1.2 Floor Mounting ........................................................................................................................2
1.1.3 Rack Mounting (4 Enclosure Only).............................................................................................2
1.2 Electrical Connections ..................................................................................................................3
1.2.1 Changing Transformer Taps......................................................................................................3
1.2.2 AC Input Connections ..............................................................................................................4
1.2.3 Output Connections .................................................................................................................4
1.2.4 Standard Alarms......................................................................................................................6
1.2.5 External Temperature Compensation (Option 11W/11Y)..............................................................7
2Operation ...........................................................................................................................................8
2.1 Starting the ESCR125 ..................................................................................................................8
2.1.1 Checking the Installation ..........................................................................................................8
2.1.2 Starting/Stopping the ESCR125.................................................................................................8
2.1.3 Start-Up Sequence...................................................................................................................8
2.2 Front Panel Display......................................................................................................................9
2.2.1 Controls..................................................................................................................................9
2.2.2 LED Indicators/Alarms............................................................................................................ 10
2.3 Configuration Mode ................................................................................................................... 11
2.4 ESCR125 Customer Configuration Menu Structure ........................................................................ 11
3Service............................................................................................................................................. 14
3.1 Performing Routine Maintenance ................................................................................................ 14
3.2 Troubleshooting Procedure......................................................................................................... 15

iv
3.3 Troubleshooting Chart ............................................................................................................... 16
Appendix A: ESCR125 Specifications.......................................................................................................... 17
Appendix B: Manufacturer’s Warranty........................................................................................................ 18
Appendix C: Document Control and Revision History................................................................................... 18
Table of Figures
Figure 1 - 3 Enclosure Wall Mounting Dimensions...........................................Error! Bookmark not defined.
Figure 2 - 4 Enclosure Wall Mounting Dimensions...........................................Error! Bookmark not defined.
Figure 3 - Floor Mounting Dimensions..........................................................................................................2
Figure 4 - Rack-Mounting Configurations .....................................................................................................2
Figure 5 - Input Terminals Connection Schematic .........................................................................................3
Figure 6 - Control/Alarm Board ...................................................................................................................6
Figure 7 - Example Connections (Customer Provided Equipment)...................................................................7
Figure 8 - External Temperature Probe Connection.......................................................................................8
Figure 9 - Front Panel Display .....................................................................................................................9
Figure 10 - Internal Temperature Compensation Setup ............................................................................... 12
Figure 11 - External Temperature Compensation Setup............................................................................... 12
Table 1 - Case Type, Weight, and Dimensions..............................................................................................1
Table 2 - Available Rack-Mounting Configurations.........................................................................................2
Table 3 - Input Terminal Connections............................................................Error! Bookmark not defined.
Table 4 - AC/DC & Ground Wire Size Minimum Requirements ........................................................................4
Table 5 - Wire Size/Area Table....................................................................................................................5
Table 6 - Alarm Logic .................................................................................................................................6

v
Model Scope/General Description
The La Marche model ESCR125 industrial battery charger product line utilizes microprocessor controlled SCR
Charging Technology. The PWM control provides the highest reliability that is required for maintaining and
recharging batteries. The ESCR125 features adjustable Float and Equalize voltages, soft start, equalize timer,
and is configurable for Flooded Lead Acid, NiCad or VRLA batteries. The ESCR125 offers both AC and DC
breakers as standard equipment.
Understanding the Model Number
The ESCR125 model number is coded to describe the features that are included. Find the model number on the
nomenclature nameplate of the charger. Follow the chart below to determine the configuration of the battery
charger.
Optional Accessories Included in the Charger
This charger may have been outfitted with a number of optional accessories or option packages. To determine
the options included (if any) refer to the cover page of the manual package. If the manual package that is
included with the charger is no longer available, contact La Marche and provide the model or serial number of
the charger to receive a list of the included accessories.

1
1 Installation
1.1 Mounting the ESCR125
For user convenience, the ESCR125 can be wall or floor mounted. The 4 enclosure can also be rack mounted.
Be sure that the Wall or Floor planned for installation can support the weight of the ESCR125.
Table 1 –Case Type, Weight, and Dimensions
1.1.1 Wall Mounting
To wall-mount the ESCR 125, install bolts on the wall rated to support the charger's weight plus a safety factor
of at least four times. Refer to Table 1 for charger weight specifications. Secure the charger on bolts, add
appropriate mounting hardware, and tighten securely. Refer to the figures below for mounting dimensions.
NOTE: All dimensions are in inches. For further ESCR125 enclosure information, see the outline drawings online
at http://www.lamarchemfg.com/info/enclosure-drawings.html
Figure 1 –3 Enclosure Wall Mounting
Dimensions
Figure 2 –4 Enclosure Wall Mounting
Dimensions

2
1.1.2 Floor Mounting
To floor-mount the ESCR 125, install four anchor bolts into the floor. Place the charger on the anchor bolts, add
appropriate mounting hardware onto the floor-mounting anchor bolts, and tighten securely. Refer to Figure 3
for hardware specifications and floor-mounting dimensions. All dimensions are given in inches.
Figure 3 –Floor Mounting Dimensions
1.1.3 Rack Mounting (4 Enclosure Only)
The ESCR125 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 4 enclosures are shipped from the factory with the necessary
brackets installed for rear mounting on a 19” relay rack (The same bracket is used for wall mounting and cannot
be removed). If center mounting is desired, a rack-mounting kit is available for the 4 enclosure. Before installing
the charger on the rack, locate the placement of the conduit entrances and assure the knockouts on the sides
or bottom of the charger are accessible after the charger is rack-mounted. The table and figure below shows
rack-mounting options for ESCR125.
Rack Mounting Procedure
To rack mount the ESCR125, first mount the charger onto the
rack-mounting brackets using the hardware supplied. Second,
install the brackets onto the rack. Provide at minimum 6in
(152mm) of air space above and below to allow for cooling.
Figure 4 –Rack-Mounting
Configurations
Table 2 –Available Rack Mount Configurations

3
1.2 Electrical Connections
1.2.1 Changing Transformer Taps
The ESCR125 accepts standard input voltages of 120, 208, or 240 VAC by changing the connections to the input
terminals. Before changing the AC input taps, assure that AC supply and DC loads to the ESCR125 are turned
off and locked out. Verify that no voltage is present by using a voltmeter at all input and output terminals.
Turning off the AC and DC circuit breakers on the ESCR125 does NOT eliminate live voltages inside the
enclosure. Additionally, de-energize any external wiring to the alarm relay contacts. Change the connections to
the input terminals as shown in the table and figure below.
Note: Input mains voltage must also be changed in the configuration menu.
Changing Transformer Taps Procedure
Before beginning any work inside the charger enclosure, ensure that all incoming AC supply and DC load wires
are de-energized. Verify that no voltage is present inside the case by using a voltmeter at all input and output
terminals.
For 120 VAC Input Voltage:
1. Connect wire marked Ato terminal TB3-8
2. Connect wire marked Bto terminal TB3-10
3. Connect wire marked Cto terminal TB3-6
4. Connect wire marked Dto terminal TB3-10
AC input 1 connects to terminal TB1-1 (Line)
AC input 2 connects to terminal TB1-3 (Neutral)
For 208 VAC Input Voltage:
1. Connect wire marked Ato terminal TB3-9
2. Connect wire marked Bto terminal TB3-8
3. Connect wire marked Cto terminal TB3-5
4. Connect wire marked Dto terminal TB3-9
AC input 1 connects to terminal TB1-1 (Line 1)
AC input 2 connects to terminal TB1-2 (Line 2)
For 240 VAC Input Voltage:
1. Connect wire marked Ato terminal TB3-10
2. Connect wire marked Bto terminal TB3-8
3. Connect wire marked Cto terminal TB3-5
4. Connect wire marked Dto terminal TB3-10
AC input 1 connects to terminal TB1-1 (Line 1)
AC input 2 connects to terminal TB1-2 (Line 2)
Table 3 –Input Terminal Connections
Figure 5 –Input Terminals
Connection Schematic

4
1.2.2 AC Input Connections
Before beginning any work inside the charger, ensure that all incoming AC supply is de-energized. Verify that no
voltage is present inside the case by using a voltmeter at all input and output terminals. Check that the source
voltage and frequency match the charger front nameplate specifications. Also, confirm if charger is multi or
single input by referring to charger nameplate. If charger is confirmed to be a multi-input charger, refer to
corresponding charger schematic or AC input wiring chart inside charger for transformer tap settings. Select
wire size using the table below. This is based on an overload current of 105%of the input current listed on the
charger nameplate.
NOTE: Feeder breaker should be sized to match the size of the AC protection used in charger.
Breaker Size/
Fuse Size -
Amps
AWG Minimum Wire
Size Requirement for
Customer Connection
AWG Minimum Wire
Size for Equipment
Grounding
3
#14
#14
5
#14
#14
10
#14
#14
15
#14
#14
20
#12
#12
25
#10
#12
30
#10
#10
40
#8
#10
50
#8
#10
60
#6
#10
Table 2 –AC/DC & Ground Wire Size Minimum Requirements
(All wires specified in the table are rated at 90 °C or 194 °F)
NOTE: These are recommended sizes per La Marche Standards. The National Electrical Code (NEC) and Local
Wiring Codes must be followed.
1.2.3 Output Connections
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 2.3 for the configuration instructions. Once the configuration is set, remove
AC power from the main breaker to the charger.
Select proper size for the DC wiring from the wire size table above (Table 4). If the distance between the
charger’s DC output and the DC load exceeds 10 feet, use the Power Cabling Guide on the next page to
minimize the voltage drop across the wire distance.

5
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 charger’s DC
output terminals and the battery at less than 1/2 volt when the charger is fully loaded.
Table of Conventions:
CMA = Cross section of wire in circular MIL area
A= Ultimate drain in amperes
LF = Conductor loop feet
MaxAmp= Maximum allowable amperes for given voltage drop
AVD = Allowable voltage drop
K = 11.1 for commercial (TW) copper wire
= 17.4 for aluminum
Calculating Wire Size Requirements:
AVD KLFA
CMA  
Table 5 –Wire Size/Area Table
Calculating Current Carrying Capacity of Wire:
KLF AVDCMA
MaxAmp 


EXAMPLE: If the charger being used has a max ampere output of 33 Amps and 30 loop feet of copper wire
cable is required with an allowable voltage drop of 0.5 Volts, the wire size calculation will be:
AVD KLFA
CMA  
A= 33
LF = 30
K= 11.1
AVD = 0.5
5.0 1.113033 
CMA
= 21978 or #6AWG wire
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

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1.2.4 Standard Alarms
Four alarms are included as a standard feature of the ESCR125. The included alarms are High DC Voltage, Low
DC Voltage, Charger Failure, and AC Failure. Each alarm includes a form “C”contact, enabling the user to
connect remote annunciators. The Alarm contacts are rated for 2A at 30VDC / 0.5A @ 125VAC.
CHARGER FAILURE ALARM occurs if the charger is unable to regulate the output voltage. This alarm relay
stays latched in until the ESCR125 charger is reset.
AC FAILURE ALARM will trigger (after a preset delay) when the AC power to the charger is lost. The alarm
will automatically reset when AC power is restored to the charger. When AC power is lost, the front panel
display and indicators will remain powered by the connected batteries.
HIGH DC VOLTAGE ALARM will trigger when the DC output voltage of the charger exceeds the preset high
voltage alarm value, and will reset when the DC output voltage returns to normal. The high voltage value is
adjustable and can be set in Configuration Mode.
LOW DC VOLTAGE ALARM will trigger when the DC output voltage of the charger falls below the preset low
voltage alarm value, and will reset when the DC output voltage returns to normal. The low voltage value is
adjustable and can be set in Configuration Mode.
Table 6 –Relay Functionality
ESCR Relay Information
Relay Function
Logic
AC Fail
De-Energize On Fail
High DC Voltage
Energize On Fail
Low DC Voltage
Energize On Fail
Charger Fail
Energize On Fail
Figure 6 –Control/Alarm Board

7
Alarm Connections
Before making any connections to the ESCR125, 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.
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the NC
and Ccontacts of the desired alarm (located on the Control Card S2A-382 ). If it is desired that the annunciator
be activated when an alarm triggers, connect the annunciator leads to the NO and Ccontacts of the desired
alarm.
EXAMPLE: A customer wants a green lamp to be
illuminated when the charger has AC power and wants a
speaker to sound when the charger loses AC power. The
customer would make the connections to the NO and C
contacts between the speaker and power supply, and
would connect the NC and C contacts between the lamp
and power supply. Refer to Figure 7.
1.2.5 External 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 output voltage. As the battery temperature increases, this constant voltage will
then induce a higher output current from the charger. This higher current can result in overcharging the
battery, which in turn can result in damage to the batteries.
Temperature Compensation combats this overcharging by adjusting the charger’s output voltage based on the
temperature read by the temperature probe. In order to increase the accuracy of the temperature
compensation, the external probe can be used to measure the temperature of the battery.
Option 11W includes the compensation circuit and a 24-foot long temperature probe. Option 11Y includes the
compensation circuit and a 100-foot long temperature probe. With either option, approximately two feet of the
probe is taken inside the charger enclosure.
External Probe Connection Procedure
Before making any connections to the ESCR125, 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.
To connect the external probe, the JP4 jumper must be moved to pins 2 and 3 on the control board (Refer to
Figure 8). Moving this jumper will disable the charger's internal temperature compensation.
On the charger side, simply plug the probe's 3-pin connector in the CN11 connection on the Control/Alarm
Board. Install the remaining lug of the probe to the battery. As battery setups vary between users and battery
manufacturers, it is recommended that the battery manufacturer be consulted for placement of the probe. The
lug of the probe is completely isolated from the compensation circuitry, so the battery voltage will not affect the
compensation.
Figure 7 –Example Connections
(Customer Provided Equipment)

8
With the probe connected, enter the Configuration Mode and make
sure that Temperature Compensation has been enabled (For more
details, see section 2.3).
2 Operation
2.1 Starting the ESCR125
All equipment is shipped from the factory fully checked and adjusted based on the factory settings
listed below. Before connecting the battery, check with the battery manufacturer for the correct voltage
settings and adjust the configuration accordingly (refer to section 2.3 for configuration). Failure to
match the charger settings with the connected battery may damage or shorten the life of the battery.
Factory Settings
The factory settings of the ESCR125 are based on the customer order, unless otherwise specified. All chargers
are set at the factory with the following default settings.
Battery Type: 60 (Cell Lead Acid)
Float Voltage: 2.17 Volts/Cell (V/C) for Lead Acid (LA)
1.44 V/C for Nickel Cadmium (NC)
Equalize Voltage: 2.33 V/C for LA (1.55 V/C for NC)
Current Limit: 105%
Equalize Hours: 8 Hours
Equalize Mode: Manual
Temp. Compensation: Disabled
High DC Voltage: 2.45 V/C for LA (1.6 V/C for NC)
Low DC Voltage: 1.98 V/C for LA (1.2 V/C for NC)
Alarm Delay: 5 Seconds
2.1.1 Checking the Installation
Before starting up the ESCR125, check and verify that all connections are correct. Check that all terminations
and contacts are tightened securely. Check that the transformer is set for the correct input voltage. Check that
the input frequency matches the nameplate of the charger. Check that the battery voltage matches the DC
output voltage on the nameplate of the charger.
2.1.2 Starting/Stopping the ESCR125
Once proper connections are established, energize the charger by turning on the charger’s AC breaker (the DC
breaker should be off). This will charge the capacitors inside the charger and eliminate heavy arcing when the
batteries are connected. After about 30 seconds, turn on the DC breaker. When shutting down the ESCR125,
switch off the DC breaker first and then switch off the AC breaker.
2.1.3 Start-Up Sequence
Upon powering up the ESCR125, the LCD will display “La Marche ESCR”. During the start up sequence, the Low
DC Voltage alarm will be temporarily activated. The display will show “Float Mode” and the output Voltage and
Current of the Charger will slowly ramp up. After reaching the output voltage, the Low DC Voltage alarm will
deactivate.
Figure 8 –External Temperature Probe Connection

9
2.2 Front Panel Display
After the ESCR125 has completed start up, the “AC ON” indicator on the front panel and either the “Float” or
“Equalize” indicator on the front panel will be lit. The LCD will display the system DC output voltage and DC
output current on line one. Line two of the LCD displays the status of ESCR125.
Figure 9 –Front Panel Display
2.2.1 Controls
Up/Down Arrows –The Up and Down arrows offer no function outside of Configuration Mode. When in
Configuration Mode, the up and down arrows allow the user to navigate menus and increase or decrease
values.
Float/Equalize Button –The Float/Equalize button allows the user to manually switch between Float Mode
and Equalize Mode. When the ESCR125 is in Equalize Mode, line two of the display will alternate between
“EQUALIZE MODE” and the time remaining.
Lamp Test Button –The Lamp Test button allows the user to check the function of all of the front panel LEDs
without affecting the operation of the charger. While the lamp test is running, all of the LEDs flash and a
sequence of numbers is written to the display.
Reset/Back Button –The back button allows the user to navigate to a previous screen or out of the
configuration. Holding the back button will reset the charger. Upon restarting, the ESCR125 will once again go
through the start-up sequence describe in section 2.1.3.
Configure/OK Button –The Configure/OK button brings the ESCR125 into Configuration Mode. This allows
the user to set charger parameters in Basic Settings as well as Float Voltage, Equalize Voltage, Equalize Timer,
Current Limit, Temperature Compensation and Alarm settings. Once in Configuration Mode, this button becomes
the OK button which is used to make selections with in the menus.

10
2.2.2 LED Indicators/Alarms
LCD Display –The LCD Display shows the output DC voltage and output DC amperage of the ESCR125 at all
times. The second line of the display shows the mode of the charger, as well as displaying the different alarm
conditions, should they occur.
Float LED (Green) –The Float LED with illuminate when the charger is in Float Mode.
Equalize LED (Amber) –The Equalize LED will illuminate when the charger is in Equalize Mode.
AC ON (Green) –The AC ON LED will illuminate whenever AC voltage is present at the charger input
terminals.
Charger Fail LED (Red) –The Charger Fail LED will illuminate when the charger is unable to regulate the
output voltage. A set of Form “C”contacts is also provided to enable the user to connect a remote annunciator.
Battery Fault LED (Red) –The Battery Failure LED illuminates to indicate an issue with the battery.
Conditions that would cause this LED to illuminate are an open or high resistance battery, or a missing battery.
Current Limit (Red) –The Current Limit LED will illuminate when the charger is operating in a current limit
condition.
High DC (Red) –The High DC LED will illuminate when the DC output voltage of the charger exceeds the
preset high voltage alarm value. The high voltage value is adjustable and can be set in Configuration Mode. A
set of Form “C”contacts is also provided.
Low DC (Red) –The Low DC LED will illuminate when the DC output voltage of the charger falls below the
preset low voltage alarm value. The low voltage value is adjustable and can be set in Configuration Mode. A set
of Form “C”contacts is also provided.
AC Fail (contacts only) –The AC Fail alarm does not have an LED indicator, however, an AC Fail message
appears on the LCD display and the AC ON LED will turn off. A set of Form “C”contacts is provided for an AC
Power Failure Alarm annunciation. These contacts change state when AC Fail threshold is reached.

11
2.3 Configuration Mode
Pressing the Configure/OK button enters Configuration Mode. Each of the adjustable settings of the ESCR125 is
accessible using Configuration Mode. Once in Configuration Mode, the user can navigate using the Up and
Down arrows to the right of the display, the Reset/Back button, and the Configure/OK button.
The following features are available to be configured:
Number of Cells –Allows output configuration selection (voltage/current) and the number of cells.
1. Select No. of Cells
oSelect Battery Type
Select number of battery cells
Float Voltage –Allows the selection of voltage per cell for Float operation.
1. Select FLOAT VOLTAGE from Configuration Menu
oSet to the voltage recommended by battery manufacturer
Equalize Voltage –Allows the selection of voltage per cell for Equalize operation.
1. Select EQUALIZE VOLTAGE from Configuration Menu
oSet to the voltage recommended by battery manufacturer
Equalize Timer –Allows selection for the length of the Equalize cycle (in hours) as well as when an Equalize
cycle is initiated (manual/automatic).
1. Select EQUALIZE TIMER from Configuration Menu
oSelect EQUALIZE HOURS
Set the hours that the charger will be in the EQUALIZE mode.
oSelect EQUALIZE MODE
set for MANUAL or one of the automatic modes:
Manual: Equalize cycle is started manually
7 Days: Equalize cycle is started automatically every 7 days
14 Days: Equalize cycle is started automatically every 14 days
30 Days: Equalize cycle is started automatically every 30 days
Auto-AC Fail: Equalize cycle starts automatically when AC input power is restored after a power
failure (AC power has to be off for 5 minutes for this mode to be activated)
Auto-DC Low: Equalize cycle starts automatically if battery voltage falls below the Low Voltage Alarm
set point
In any Equalize Mode, the ESCR125 will return to Float Mode at the end of the Equalize cycle.
Current Limit –Allows adjustment of the current limit from 50% to 110% of rated output.
1. Select LIMIT CURRENT from Configuration Menu
oSelect current limit as a percentage of the rated output current of the charger.

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Temperature Compensation –Allows enable or disable of the Temperature Compensation feature.
1. Select TEMP. COMP. from Configuration Menu
oSelect DISABLE or ENABLE
NOTE: For internal compensation, enable the setting and place JP4 jumper across pins 1 and 2. For external
compensation, disable the setting and place jumper across 2 and 3 (refer to Figure 10 and 11).
Alarm Settings –Allows setting the alarm thresholds for the provided alarms and the alarm time delay
1. Select ALARM SETTING from the Configuration Menu.
oALARM DELAY
Select the alarm delay in seconds. Delay can be set from 1 second to 30 seconds
oDC LOW VOLTAGE
Select the desired low voltage alarm point in V/C (volts per cell)
oDC HIGH VOLTAGE
Select the desired high voltage alarm point in V/C (volts per cell)
oAC FAIL VOLTAGE
Select AC Mains High
Alarm will activate when the AC voltage is the percentage selected above the
nominal voltage.
Select AC Mains Low
Alarm will activate when the AC voltage is the percentage selected below the
nominal voltage.
Default Settings –Allows the user to reset all settings to how they were programmed from the factory. To
reset the ESCR125 settings to the original default settings, scroll to DEFAULT SETTING in the configuration
menu. Select DEFAULT SETTING. Press the Configure/OK button to confirm.
Figure 10 –
Internal Temperature
Compensation Setup
Figure 11 –
External Temperature
Compensation Setup
JP4
JP4

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2.4 ESCR125 Customer Configuration Menu Structure

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3 Service
All work inside the ESCR125 should be performed by a qualified electrician. La Marche is not responsible for any
damages caused by an unqualified technician.
Before working inside the ESCR125, 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.
3.1 Performing Routine Maintenance
Although minimal maintenance is required with La Marche chargers, routine checks and adjustments are
recommended to ensure optimum system performance.
Yearly
1. Confirm air vents are open. Remove dust and debris from interior of unit.
2. Verify all connections are tight.
3. Perform a visual inspection on all internal components.
4. Check front panel meters for accuracy and LED operation.
5. Check capacitors for electrolyte leakage (and replace if necessary).
7th Year
1. If the charger is consistently operated in higher temperature environments, all capacitors are recommended
to be replaced.
10th Year
1. Check magnetics, components and wiring for signs of excessive heat.
2. It is recommended to replace all capacitors if not done so at the 7 year interval.