LA MARCHE Option 22D Digital Meter Package User Manual
- October 30, 2023
- La Marche
Table of Contents
LA MARCHE Option 22D Digital Meter Package
Product Information
The Option 22D Digital Meter Package is an electronic static switch that automatically transfers an AC load from its primary source to its alternate source in case of a primary source failure. It includes the S2A-239DS digital static switch board and the S2A-526 display assembly, which has a 4-line LCD display, 7 push buttons, and 8 alarm and status LEDs. The display shows the software version, date code, building envelope tables, and the status of various indicators such as Auto/Manual Retransfer, Low DC/Shutdown, High DC Shutdown, Utility Available, Inverter Available, Phase Lock, Preferred Source, and Alternate Source.
Technical Specifications
- Re-Transfer Mode: Automatic
- Preferred Source: Inverter
- Load Window High: +20%
- Load Window Low: -20%
- Utility Voltage High: +10%
- Utility Voltage Low: -10%
- Inverter Voltage High: +10%
- Inverter Voltage Low: -10%
- Low DC Voltage: 1.98 V/C (Lead Acid), 1.20 V/C (Nickel Cadmium)
- Low DC Voltage Reset: 2.10 V/C (Lead Acid), 1.25 V/C (Nickel Cadmium)
- Low DC Voltage Shutdown: 1.73 V/C (Lead Acid), 1.10 V/C (Nickel Cadmium)
- Low DC Voltage S.D. Reset: 2.05 V/C (Lead Acid), 1.35 V/C (Nickel Cadmium)
- High DC Voltage Shutdown: 2.45 V/C (Lead Acid), 1.60 V/C (Nickel Cadmium)
- High DC Voltage S.D. Reset: 2.40 V/C (Lead Acid), 1.55 V/C (Nickel Cadmium)
- Current Limit: 150% of Nominal Output Current
- Transfer Time: 1 Millisecond
- Hit Counter: 8
- S.S. Sensitivity: High
- Delay (secs.): 20 (Lead Acid), 10 (Nickel Cadmium)
Product Usage Instructions
Step 1: Power up the equipment and wait for the display to show the software version and the date code.
Step 2: Once the lamp test is completed, the display will show Building Envelope Tables and then show “Waiting for Source to Start…”
Step 3: Once the inverter begins to output, the idle display will show the following information:
- Status indicators such as Auto/Manual Retransfer, Low DC/Shutdown, High DC Shutdown, Utility Available, Inverter Available, Phase Lock, Preferred Source, and Alternate Source.
- The Up/Down arrow buttons can be used to scroll through the information.
Step 4: If the equipment settings are determined to be incorrect, make adjustments as follows:
- Do not make any adjustments unless the equipment has been powered up.
- Determine the incorrect settings.
- Adjust the settings as per the technical specifications provided in the user manual.
Option 22D – Operation
General Description
- The 22D option revolves around the electronic static switch; an automatic device that will transfer, in a rapid 1 millisecond, an AC load its primary source to its alternate source in the event of a primary source failure.
- The static switch is controlled by the S2A-239DS digital static switchboard, working alongside the S2A-526 display assembly on the front panel which provides a user-friendly interface. The S2A-526 display assembly includes a 4-line LCD display, 7 push buttons, and 8 alarm & status LEDs as seen below.
- The display will show the software version and the date code, as well as go through a lamp test. Afterward, the display will show “Building Envelope Tables” and then show “Waiting for Source to Start…” Once the inverter begins to output, the idle display will read out the following information:
- Load Voltage
- Utility Voltage
- Inverter Voltage
- Load on Inverter/Utility
- Load Current
- Utility Frequency
- Inverter Frequency
- Preferred Source
- Volt-Amps
- Input DC Volts
- Input DC Amps (Optional)
NOTE : The Up/Down arrow buttons can be used to scroll through the information
Status Indicator LEDs
- Auto/Manual Retransfer LED is ON solid when the inverter is set to automatically transfer back to preferred source when available. LED is ON blinking when the inverter is set to be manually transferred (by the user) back to the preferred source.
- Low DC/Shutdown LED is ON solid when the inverter source has shut down due to very low input DC voltage. LED is ON blinking when the inverter has low input DC voltage.
- High DC Shutdown LED is ON when the inverter source has shut down due to very high input DC voltage.
- Utility Available LED is ON when the utility source is deemed available.
- Inverter Available LED is ON when the inverter source is deemed available.
- Phase Lock LED is ON when the both sources are in sync within the phase window.
- Preferred Source LED is ON when the load is operating on the preferred source.
Alternate Source LED is ON when the load is operating on the alternate source.
The Test Transfer push button allows for transferring the load to the alternate source, if available, to assure static switch functionality.
Alarm/Status Description
- AUTO/MANUAL RETRANSFER LED will be on solid when the inverter is set to automatically transfer back to preferred source when available. The LED will be blinking when the inverter is set to be manually transferred (by the user) back to the preferred source.
- PHASE LOCK LED will turn on if the inverter and utility (AC Bypass) sources are synchronized within the phase window.
- UTILITY AVAILABLE LED will turn on if the utility (AC Bypass) source is deemed available.
- INVERTER AVAILABLE LED will turn on if the inverter source is deemed available.
- PREFERRED SOURCE LED will turn on if the A31 is operating on the preferred source. The preferred source may be set to either Inverter or Utility (AC Bypass).
- ALTERNATE SOURCE LED will turn on if the A31 is operating on the alternate source. The preferred source may be set to either Inverter or Utility (AC Bypass).
- LOW DC VOLTAGE ALARM will trigger and the red “LOW DC/LOW DC SHUTDOWN” LED will blink if the input DC voltage falls below the specified voltage threshold of the alarm for longer than the specified alarm delay setpoint. The alarm will clear once the input DC voltage rises above the Low DC Voltage Reset threshold.
- LOW DC SHUTDOWN ALARM will trigger and the red “LOW DC/LOW DC SHUTDOWN” LED will turn on solid if the DC voltage falls below the specified percentage or voltage threshold of the alarm for longer than the specified alarm delay setpoint. If the
- Low DC Shutdown alarm activates, the inverter source shuts off to prevent irreversible damage to the inverter. The alarm will clear, and the inverter source will power back up once the input DC voltage rises above the Low DC shutdown reset threshold.
- HIGH DC SHUTDOWN ALARM will trigger and the red “HIGH DC SHUTDOWN” LED will turn on if the input DC voltage of the charger rises above the alarm threshold for longer than the specified alarm delay setpoint. If the High DC Shutdown alarm activates, the inverter source shuts off to prevent irreversible damage to the inverter. The alarm will clear, and the inverter source will power back up once the input DC voltage falls below the High DC shutdown reset threshold.
Most alarms have adjustable time delays to energize; ranging from 0 through 255 seconds. Refer to Table 1 for the factory setting of each alarm.
NOTE : V/C – Volts per Cell.
Adjusting Parameters
All equipment is shipped from the factory fully tested and set per model number. 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, adjustments may be made as detailed below.
Settings Menu
In the Settings Menu, the user can access and change various parameters.
Access menus by pressing the ENTER/MENU button on the front panel. Navigate
using the UP, DOWN, ENTER, and BACK buttons. To enter a submenu, use the ENTER
button. To exit a submenu, use the BACK button. To exit the Settings Menu,
continue to press the BACK button until prompted to exit and save settings.
Follow the prompts as desired.
NOTE : It is important to be aware that transfers are disabled in the
calibration modes.
The Settings Menu is as follows:
Retransfer Mode
This setting is used for selecting the mode for re-transferring the load. The
Automatic setting would cause the load to transfer to the preferred source
whenever available. The Manual setting would cause the load to maintain on the
present source if both sources are available. The currently used source can be
changed in this mode by pressing the Test Transfer button when in the main
screen.
NOTE : When in Manual Retransfer Mode, the user will have to press the
Test Transfer button in order to transfer the load from alternate source to
preferred source in the event of a preferred source failure or outage.
Load Settings
Preferred Source
This setting allows the user to select whether the primary source is either
the inverter or the utility
Re-Transfer Delay
This setting is used to set the time the inverter will attempt to retransfer
from the Alternate Source back to the Primary Source. The inverter must be in
Auto Re-Transfer Mode for this setting to have any effect. The Re-transfer
Delay may be adjusted from 0 to 20 seconds in 1-second increments, with 20
being the default.
Load Window High
The upper allowable limit for the Load Voltage signal may be set in terms of
percent. The maximum allowable upper setting is +30% and the minimum allowable
upper setting is +10%. The default is +20%. The setting is adjustable in 1%
increments.
Load Window Low
The lower allowable limit for the Load Voltage signal may be set in terms of
percent. The maximum allowable lower setting is -30% and the minimum allowable
lower setting is -10%. The default is -20%. The setting is adjustable in 1%
increments.
NOTE : With S.S. Sensitivity set to Low, Load Window Low is automatically
set to 30% (fixed value)
Utility Settings
Utility Voltage High
The maximum allowable/acceptable limit on the Utility Voltage defaults to the
Output Voltage setting plus 10% (EX: The default setting for a 120VAC output
inverter is 132VAC RMS). Once the voltage is out of range, the utility source
will be deemed unavailable and the inverter will transfer to the inverter
source if available.
Utility Voltage Low
The minimum allowable/acceptable limit on the Utility Voltage defaults to the
Output Voltage setting minus 10% (EX: The default setting for a 120VAC output
inverter is 108VAC RMS). Once the voltage is out of range, the utility source
will be deemed unavailable and the inverter will transfer to the inverter
source if available.
Utility Delay
This setting is used to set the amount of time the Utility Voltage must be
within the upper and lower limits described above for the logic to consider
the Utility Voltage to be within tolerance. The Utility Delay may be adjusted
from 0 to 10 seconds in 1-second increments, with 10 being the default.
Inverter Settings
Inverter Voltage High
The maximum allowable/acceptable limit on the Inverter Voltage defaults to the
Output Voltage setting plus 10% (EX: The default setting for a 120VAC output
inverter is 132VAC RMS). Once the voltage is out of range, the inverter source
will be deemed unavailable and the inverter will transfer to the utility
source if available.
Inverter Voltage Low
The minimum allowable/acceptable limit on the Inverter Voltage defaults to the
Output Voltage setting minus 10% (EX: The default setting for a 120VAC output
inverter is 108VAC RMS). Once the voltage is out of range, the inverter source
will be deemed unavailable and the inverter will transfer to the utility
source if available.
Inverter Delay
This setting is used to set the amount of time the Inverter Voltage must be
within the upper and lower limits described above for the logic to consider
the Inverter Voltage to be within tolerance. The Inverter Delay may be
adjusted from 0 to 10 seconds in 1-second increments, with 10 being the
default.
Communications
The communication settings menu changes depending on the type of communication
protocol used in the inverter. For details on connection and operation
instructions, refer to the communication instruction manual included with the
inverter
Phase Window
This setting allows the user to adjust the maximum allowable amount of degrees
the two sources may have in difference in order for the sources to be
considered out of phase. If the difference is greater, the Phase Lock LED will
turn off. The Phase Window may be adjusted from 1-10 degrees, with 8 being the
default setting.
Reset to Defaults
This setting allows the user to reset all settings to how they were programmed
from the factory.
Hit Counter
This setting is used to determine the maximum allowable Load Voltage
deviations outside of the predefined envelope that will trigger a transfer.
The Hit Counter may be adjusted from 1 to 20 hits, with 8 being the default
setting.
NOTE : With S.S. Sensitivity set to Low, Hit Counter is automatically set
to 18 (fixed value).
WARNING : Adjusting the Hit Counter setting will affect the 1-millisecond
transfer time. The higher the Hit Counter value, the slower the transfer time
will be. Only adjust if absolutely necessary.
Alarm Settings
The Alarm Settings menu provides access to adjust basic settings related to
the alarms. The user can set the threshold values that trigger an alarm, that
clear an alarm, and the alarm time delays. This applies to the following
alarms: Low DC Voltage, Low DC Voltage Shutdown, and High DC Voltage Shutdown.
When a value is changed and ENTER is pressed, the inverter immediately uses
these new values. However, if the user exits out of the Settings Menu without
saving, the threshold values will revert to the previously set thresholds.
Test LEDs
The Test LEDs menu allows the user to run a basic lamp test on the A31. After
selecting this menu, press the ENTER button to light all of the LEDs on the
front panel display. To end the LED test, press the BACK button.
NOTE : Any additional LEDs on auxiliary boards will not be affected by
this LED test.
S.S. Sensitivity
This setting allows the user to adjust the sensitivity level of the Static
Switch. The Static Switch sensitivity may be set to Low or High, with High
being the default setting. If the Static Switch is too sensitive & transfers
occur often then the sensitivity level may be adjusted. When a value is
changed and ENTER is pressed, a warning message will come up: Press ENTER to
confirm. The card will reset and the load will drop momentarily. Press BACK to
cancel.
WARNING : Adjusting the S.S. Sensitivity level requires a reset. The card
will reset automatically, and the load will drop momentarily. Due to this, it
is recommended to set the Manual Bypass Switch on Bypass not to drop the load.
It is also important to acknowledge the transfer time of the static switch
will be affected by changing the sensitivity level. High sensitivity level
achieves a 1-millisecond transfer time & Low sensitivity level achieves a
4-millisecond transfer time.
Document Control and Revision History
- Part Number : 147889
- Instruction Number: P25-LOPT22D-2
- Issue ECN: 22782 – 01/2
- 22797-1 – 12/22
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
Instruction Drawing Number: P25-LOPT22D-2
Tel : 847-299-1188
Fax : 847-299-3061
Revision A00
Rev. Date: CPN 147889
ECN:22797-1
www.lamarchemfg.com