ABB LMIU1500 User manual

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Tel: [phone] Fax: [phone] 750.2207 Rev. B
LMIU 1500W Mini Inverter
LMIU 1500W Mini Inverter
INTERRUPTIBLE EMERGENCY LIGHTING
UNIT INVERTER INSTRUCTION MANUAL
THIS UNIT CONTAINS A
RECHARGEABLE VALVE-REGULATED
LEAD ACID BATTERY. PLEASE
RECYCLE OR DISPOSE OF
PROPERLY.
IMPORTANT SAFEGUARDS
When using electrical equipment, basic safety precautions should always be followed, including the following:
READ THIS MANUAL AND FOLLOW ALL SAFETY INSTRUC TIONS
THOROUGHLY BEFORE OPERATING THEULMIU INVERTER SYSTEM
SAVE THESE INSTRUCTIONS
1. Install in accordance with the National Electrical Code and local regulations.
2. The LMIU contains
potentially hazardous voltages. Installation, maintenance and service work should be performed by qualified
and trained personnel.
3. Units to be
installed only as per configuration described in this instruction manual.
4. Electricians and end-users need to ensure product system compatibility before final installation.
5. The AC voltage rating of this equipment is specified on the product label. Do not connect
the LMIU equipment to any other voltage.
6. All unused wires must be capped to prevent shorting.
7. The LMIU should be mounted securely and in locations and at heights where it will not be readily subjected to tampering by
unauthorized
personnel.
8. The use of accessory equipment and replacement parts not recommended by manufacturer may cause an unsafe condition and will
void the
warranty.
9. Do not mount near gas or electric heaters.
10. Do not let power supply cords touch hot surfaces.
11. Do not use this equipment for other than its intended
use.
12. DO NOT USE OUTDOORS.
13. The LMIU uses sealed valve regulated lead acid batteries. Batteries can be punctured if not handled properly, therefore use caution
when servicing batteries. In the event battery acid comes in contact with eyes or skin, flush with fresh water and consult a physician
immediately.
NOTE: At 120Vac, unit is rated at power factor 0.8. For loads having a power factor below 0.8, unit capacity needs to be derated.
At 277Vac, unit is rated at unity power factor. For loads having a power factor below 1, unit capacity needs to be derated.
All ABB inverter products receive 100% quality inspection before shipment to ensure proper and satisfactory operation.
When operated under normal conditions, ABB inverter products will provide years of dependable service.
For the complete warranty information, please refer to the landing page of our website (http://www.lightalarms.com).
BEFORE CONTACTING TECHNICAL SUPPORT MAKE SURE TO FOLLOW ALL STEPS IN SEQUENCE AND REFER TO
THE TROUBLESHOOTING GUIDE INCLUDED IN THIS MANUAL.
MODEL NUMBER AC SPECS EMERGENCY POWER AVAILABLE FOR LOAD APPROX.
WEIGHT
90 MIN 2H 3H 4H
LMIU1500 120/277 VAC, 60Hz 17.6 / 6.3 Amps 1500W 1136W 789W 673W 395lbs.
WARRANTY

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LMIU 1500W Mini Inverter
WARNING: DE-ENERGIZE THE CIRCUIT BEFORE INSTALLATION OR MAINTENANCE.
WARNING: DO NOT ENERGIZE THE CIRCUIT UNTIL ALL STEPS HAVE BEEN SUCCESSFULLY COMPLETED.
WARNING:
ALWAYS TURN OFF THE INVERTER MODULE AND THE AC SUPPLY TO THE EQUIPMENT AND
DISCONNECT THE BATTERY BEFORE SERVICING. ONLY QUALIFIED SERVICE TECHNICIANS
SHOULD SERVICE THIS EQUIPMENT. THE USE OF PARTS SUPPLIED BY OTHER THAN THE
MANUFACTURER MAY RESULT IN AN UNSAFE CONDITION OR EQUIPMENT FAILURE AND WILL
VOID THE WARRANTY.
WARNING: DO NOT CONNECT THE BATTERY(IES) UNTIL UNIT IS READY FROM PERMANENT START-UP.
PREMATURE CONNECTION MAY DRAIN BATTERIES AND PREVENT LATER START-UP.
WARNING: FAILURE TO CONNECT THE BATTERIES PROPERLY MAY RESULT IN EQUIPMENT FAILURE OR
AN UNSAFE CONDITION AND WILL VOID THE WARRANTY.
CAUTION: BATTERIES ARE SHIPPED SEPARATELY. PLACE THEM IN A LOCATION AWAY FROM THE WORK AREA
TO AVOID DAMAGE UNTIL INSTALLATION IN STEP 5.
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK
WHEN SERVICING, DISCONNECT BOTH NORMAL AND
EMERGENCY SOURCES: TURN OFF THE A.C. BRANCH CIRCUIT AND DISCONNECT THE BATTERY
AND TURN OFF THE INVERTER MODULE WITHIN THE MINI INVERTER.
CAUTION: ONLY ONE VOLTAGE IS ALLOWED (120V OR 277V). CONNECTION TO MORE THAN ONE VOLTAGE MAY
RESULT IN EQUIPMENT FAILURE AND VOID THE WARRANTY.
CAUTION:
THE MINI INVERTER HAS A SELF-TEST FEATURE AND CAN ENTER IN SELF-TEST MODE (MONTHLY,
BIANNUAL OR ANNUAL) AT ANY TIME. WHEN THIS OCCURS, POWER WILL BE AVAILABLE AT THE
OUTPUT OF THE MINI INVERTER, EVEN IF THE LATTER WAS CONFIGURED FOR NORMALLY-OFF
OPERATION.
IMPORTANT: FOLLOW THE APPROPRIATE WIRING DIAGRAMS. DO NOT CONNECT THE “INPUT POWER” NEUTRAL
TO THE “LOAD” NEUTRAL. FAILURE TO COMPLY MAY RESULT IN EQUIPMENT FAILURE AND VOID THE
WARRANTY.
IMPORTANT: FOR NORMALLY OFF AND SWITCHED LOADS: REMOVE THE JUMPER WIRE BEFORE WIRING THE UNIT.
REFER TO THE WIRING DIAGRAMS.
IMPORTANT:
ALL 0-10V LIGHTING CONTROL SIGNAL SHOULD BE RUN AS CLASS 2 (LOW VOLTAGE) WIRING. NEVER
RUN LINE VOLTAGE AND LOW VOLTAGE WIRING IN THE SAME CONDUIT AND PROVIDE SUFFICIENT
SEPARATION IN RACEWAY INSTALLATIONS. RUNNING THE 0-10 V SIGNAL AS CLASS 1 (LINE VOLTAGE)
WIRING INTRODUCES SOME CONCERNS, INCLUDING NOISE/ INTERFERENCE CAUSED BY COUPLING
BETWEEN THE LINE VOLTAGE AND LOW-VOLTAGE WIRES. THIS NOISE / INTERFERENCE CAN CAUSE A
VOLTAGE FLUCTUATION ON THE 0-10 V WIRES WHICH CAN CREATE A DIFFERENCE BETWEEN THE
LIGHT LEVEL REQUESTED BY THE CONTROL AND THE LIGHT LEVEL SIGNAL BEING RECEIVED BY THE
BALLAST / DRIVER.

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LMIU 1500W Mini Inverter
INSTALLATION
a. Remove the front cover of the Mini Inverter cabinets by removing the two screws located on the front of the cover of each cabinet and
retain for later use.
b. Wire the unswitched, properly-rated AC voltage supply and remote fixture wires to the installation area.
c. Orient cabinets to ensure clearance is 3.5 inches on either side of the Mini Inverter and 42 inches on the front. No clearance is
required on the bottom of the unit. For units equipped with optional wireless Nexus, a clearance of 6 inches is required on top to allow
for the protruding antenna. For units without wireless Nexus, no clearance is required on the top.
d. Mount the battery cabinet securely to the wall using the keyhole slots at the rear of the cabinet. Leave a minimum of 36 inches above
the battery cabinet for the electronic cabinet.
e. Place the electronic cabinet on top of the battery cabinet and align the four bolt/nut assemblies to the holes located on top of the
battery cabinet.
f. Install and tighten the lock washers and nuts onto the bolts inside the battery cabinet.
g. Mount the electronic cabinet securely to the wall using the keyhole slots at the rear of the cabinet.
h. Route the blue and red wires through the two holes located at the bottom of the electronic cabinet to the battery cabinet.
i. Connect the conduit containing the AC supply and remote fixture leads to the electronic cabinet. Route the incoming wires through
the knock-outs on the side of the Mini Inverter.
j. Install the batteries, but do not connect the battery leads until other wiring is completed.
k. Route the ground (green wire) from the electronic cabinet to the battery cabinet. Bolt the ground wire to the battery cabinet using the
nut and bolt provided.
STEP 1: MOUNTING THE MINI INVERTER TO WALL (SEE FIGURE 1)
WARNING:
MINI INVERTER MUST BE MOUNTED SECURELY USING A 1/4” (MIN) SCREW AND FLAT WASHER FOR
EVERY KEYHOLE. THE MOUNTING SURFACE MUST ALSO BE SUFFICIENTLY REINFORCED TO
ACCOMMODATE THE WEIGHT LISTED (SEE PAGE 1). FAILURE TO SECURE THE UNIT CAN DAMAGE THE
EQUIPMENT AND/OR CAUSE SERIOUS INJURY.
Bolt and spacer
Nut
FIGURE 1
Electronic cabinet
Battery cabinet
preassembled
to electronic cabinet.
Lock washer
Ground wire
location
CAUTION: CABINETS ARE HEAVY AND AWKWARD TO LIFT. MAKE PROPER PROVISIONS TO ENSURE SAFETY
OF INSTALLERS.
without internal
components
without internal
components

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LMIU 1500W Mini Inverter
a. Unit can be configured for either 120V in // 120V out or 277V in // 277V out.
b. Power applied to the UNSWITCHED INPUT charges the batteries.
c. The SWITCHED INPUT can be configured to operate Normally-On, Normally-Off or Switched loads.
d. Power supplied to the switched input must be fed from the same branch circuit as the unswitched input (see figure 2).
e. Unit is shipped from factory pre-set for 120V in // 120V out and configured for Normally-On load operation (see figure 2). This
configuration can be changed to fulfill customer's application.
f. In Normal AC mode, the load connected at the output is powered by the power applied to the SWITCHED INPUT.
g. In Emergency mode, the load is powered by the battery through the inverter. The inverter converts the battery DC power to AC
power.
a. Output voltage of the Mini Inverter can be configured for either 120VAC or 277VAC.
b. Identify the terminal block TB1 located on the bottom of the electronic cabinet.
c. Position of the red wire determines the voltage available at the output of the Mini Inverter.
i. When the red wire is connected at the left terminal of TB1, the output voltage available will be 120VAC.
ii. When the red wire is connected on the right terminal of TB1, the output voltage available will be 277VAC.
d. Identify the voltage rating of all the loads to be powered by the Mini Inverter.
i. If the voltage rating of the loads is 120VAC, connect the red wire to the left terminal of TB1.
ii. If the voltage rating of the loads is 277VAC, connect the red wire to the right terminal of TB1.
a. Connect the Ground wire to the Ground Bus Bar.
b. Identify the terminal block for UNSWITCHED INPUT (figures 5, 6 or 7).
c. Connect the NEUTRAL wire to the NEUTRAL position of the UNSWITCHED INPUT terminal block.
d. Connect AC Line wire
i. 120V supply: connect AC line wire to the 120V position of the UNSWITCHED INPUT terminal block.
ii. 277V supply, connect AC Line wire to the 277V position of the UNSWITCHED INPUT terminal block.
ELECTRICAL SINGLE LINE DIAGRAM FOR LMIU 1500W SINGLE CIRCUIT
STEP 2: CONFIGURATION OF OUTPUT VOLTAGE (SEE FIGURE 2 AND 3)
STEP 3: WIRING TO UNSWITCHED INPUT
WARNING: ENSURE THE BRANCH CIRCUIT BREAKER FEEDING THE UNIT IS TURNED OFF AT THE SERVICE
PANEL BEFORE WIRING.
FIGURE 2
Circuit: Normally-ON
Normal Utility Panel
120V
Neutral
Ground
Neutral(Wht) CHARGER
BATTERY
24VDC
INVERTER
120VAC(BLK) 277VAC(ORG)
SWITCHED INPUT
UNSWITCHED
INPUT
OUTPUT
HOT
NEU
120VAC(BLK)
Neutral(Wht)
Neutral(Wht)
120V(BLK)
277V(ORG)
F1
Mini Inverter comes pre-wired
for 120V. For 277V connections
remove red wire from
120V terminal and wire
to 277V terminal.
Tran sformer
Configuration:120Vin//120Vout
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
FIGURE 3
TB1
TB1
CORRESPONDING OUTPUT VOLTAGE
TO APPROPRIATE
3
4

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LMIU 1500W Mini Inverter
The Mini Inverter can be configured for various modes of operation as described below.
a. Normally-On Operation (Refer to Figure 5 for wiring details) - Fixtures remain illuminated in normal AC and emergency modes.
b. Normally-Off Operation (Refer to Figure 6 for wiring details) - Fixtures illuminated only upon loss of utility AC power.
c. Switched Load Operation (Refer to Figure 7 for wiring details) - Fixtures can be externally controlled and will illuminate upon
loss of utility AC power regardless of the state of the external control device (switch, motion sensor, dimmer, etc.).
Refer to the applicable wiring diagram in figures 5, 6 and 7 to connect the utility AC power and external control devices (where
applicable). Perform all wiring procedures in accordance with applicable codes. The unit is shipped configured to operate in Normally-On
mode by using an assembled jumper. This jumper can be removed to configure the SWITCHED INPUTS as desired.
DO NOT connect the Mini Inverter to the load at this time.
NOTE: The switched input has been jumpered and is preset for 120VAC for Normally-On Operation. For 277VAC, remove jumper wire
from 120VAC input power terminal and reinstall jumper wire into 277VAC input power terminal.
a. Position the batteries in cabinet as shown. Make sure to respect the battery polarities.
b. The battery assembly consists of two battery strings, 24Vdc nominal each. Each battery string consists of two 12V batteries
connected in series. “Battery 1" and “Battery 2" form the first string. “Battery 3" and “Battery 4" form the second string. The two
24V battery strings are connected in parallel.
c. Route the RED (positive) and BLUE (negative) battery cables plus the thin yellow cable (AWG#22) from the electronic cabinet to
the battery cabinet.
d. Connect the battery interconnect cables ALONG WITH THE THIN YELLOW CABLE (AWG# 22).
e. Measure the DC voltage between the yellow cable and the main negative terminal of the battery bank. Confirm voltage is between
12V and 13V.
f. Connect the BLUE (negative) cable routed from the electronic cabinet to the main negative terminal of the battery bank.
g. Measure the DC voltage between the main positive terminal and the main negative terminal of the battery bank. Confirm voltage
is between 24V and 26V. If measured voltage is different, check battery wiring.
h. Connect the RED (positive) cable routed from the electronic cabinet to the main positive terminal of the battery bank.
i. Tighten all bolts to a torque of 78 lbf-in ± 4 lbf-in (figure 4).
Note: A small spark may occur when connecting to the battery wires. This is normal and is caused by large capacitors contained in the
mini inverter being charged.
a. Confirm load is not connected.
b. Follow start-up procedure in Step 7.
STEP 4: WIRING TO SWITCHED INPUT
CAUTION: POWER SUPPLIED TO THE SWITCHED AND UNSWITCHED INPUTS MUST BE FED FROM THE SAME
BRANCH CIRCUIT.
CAUTION: A 277VAC rated switch is required for use with 277VAC input.
STEP 5: CONNECT BATTERIES (SEE FIGURE 4)
STEP 6: START-UP WITH NO LOAD CONNECTED.
FIGURE 4
BLUE
RED
BLACK JUMPER
Battery 1
Battery 2
Battery 3
Battery 4
BLUE
RED
Main
Main
positive
terminal
negative
terminal
IMPORTANT:
YELLOW WIRE MUST BE
CONNECTED ALONG WITH THE
BLACK JUMPER WIRE TO THE
NEGATIVE (-) POST OF THE
BATTERY.

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LMIU 1500W Mini Inverter
a. Turn on switch located on right hand side of inverter module in the electronic cabinet. Emergency lights and indicator will not
illuminate.
b. Energize AC main supply. Status Indicator on the left side of electronic cabinet will illuminate. For information on the Status
Indicator, see Information Section: FEATURES AND OPTIONS.
c. If status LED Indicator is not green, reset the system. (Refer to “SYSTEM RESET” - page 7).
d. Manually test unit by pressing test switch for 1 second. (Refer to “MANUAL TEST” - page 7).
Note: this will initiate a 1 minute manual test.
e. Measure and record voltage at the output terminal block.
f. Confirm measured output voltage matches voltage rating of the loads.
g. Following the 1 minute test, simulate a power outage by turning off the AC main circuit breaker feeding the Mini Inverter.
h. Measure and record voltage at the output terminal block.
i. Confirm measured output voltage matches voltage rating of the loads. If voltages do not match, check the wiring or call Technical
Support.
a. Turn off switch located on right-hand side of inverter module in the electronic cabinet.
b. Turn off AC main circuit breaker in the service panel feeding the Mini Inverter.
a. Confirm all circuits are de-energized.
b. Confirm that measured output voltage of Mini Inverter matches voltage rating of loads. Wire load.
c. Identify output terminal block (refer to figures 5, 6 and 7).
d. Connect Ground wires from loads to Ground Bus Bar.
e. Connect neutral wire from load to neutral terminal of output terminal block.
f. The neutral of emergency fixtures must be wired to output terminal block.
g. Do not connect the neutral wire of emergency fixtures to neutral wire of normal non-emergency lighting fixtures.
h. Connect hot wire from emergency lighting loads to the “HOT” terminal of OUTPUT terminal block.
a. With loads connected, follow the start-up procedure in Step 7.
b. A Normally-ON fixture must be ON, Normally-OFF must be OFF. A Switched Emergency Fixture must only be ON when switch is
in ON position.
c. Re-install the cover of the Mini Inverter using original hardware.
NEXUS® (OPTION)
NO WIRING IS REQUIRED FOR THE NEXUS® VERSION.
See Nexus® addendums: 750.1532 and 750.1641 for more information and antenna installation.
See Nexus®Pro addendums: 750.1641 and 750.2060 for antenna installation and important information before powering up unit.
MANUAL TEST
Press test switch for 1 second to initiate a 1 minute manual test. Status Indicator will flash green. All normally-ON lamps (switched or
unswitched) will turn ON. All normally-OFF lamps shall also be ON. After 1 minute test, lamps will revert to normal operating mode and
unit will revert to recharge mode. Status indicator will be steady ON green if no fault has been detected. If a fault is detected, refer to the
FEATURES AND OPTIONS pp. 9-10 for diagnostics and auto test features.
Allow the batteries to charge for a minimum of 48 hours after installation or power failure before conducting a 90-minute discharge test.
The Life Safety Code and the Authorities having Jurisdiction require an annual 90-minute discharge test.
STEP 7: START-UP PROCEDURE
STEP 8: SHUT DOWN PROCEDURE.
STEP 9: CONNECT THE LOAD.
STEP 10: START-UP WITH LOAD CONNECTED.

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LMIU 1500W Mini Inverter
SYSTEM RESET
Resetting the system:
Depending on the sequence of installation, some units may require a system reset. To reset, press and hold test switch on left
side of unit for 6 seconds.
NS
MAINTENANCE
BATTERY:
The batteries supplied in this equipment are high quality maintenance-free Valve Regulated Lead Acid design.
Ambient temperature of electrical room where batteries are installed should be 25° C (77° F) for maximum battery performance.
Replace batteries when they no longer operate the load for 90 minutes.
Replace only with manufacturer supplied parts.
Properly dispose of or recycle the Lead-Acid battery.
NORMALLY-ON OPERATION
Circuit configured to operate in Normally-On mode.
Switched input
Utility
Neutral
Ground
NEUTRAL
120Vac
277Vac
UNSWITCHED
INPUT
OUTPUT
SELECT THE
HOT
LINE
Neutral Hot
CIRCUIT #1
Neutral
Hot(120V)
TB1 LOCATION
input
FIGURE 5
NOTE: WIRING DIAGRAMS
ACTUAL POSITION OF COMPONENTS
Configuration shown: 120V in // 120V out.
For 277V in // 277V out, connect utility hot wire to 277V position
{
Unswitched
{
UTILITY
UNSWITCHED
SWITCHED
INPUT
INPUT
Blue
Unit shipped with assembled jumper in place.
SIMPLIFIED FOR ILLUSTRATION.
MAY VARY.
(LOAD)
CORRECT
AT TB1
SWITCHED
INPUT
VOLTAGE
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE TO APPROPRIATE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
CORRESPONDING OUTPUT VOLTAGE
TB1
NEUTRAL
NOT USED
Important:
For 277 V output: red wire must
be removed from 120 V side of
terminal block and wired to 277 V
side of terminal block.

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LMIU 1500W Mini Inverter
NORMALLY-OFF OPERATION
Circuit configured to operate in Normally-Off mode.
SWITCHED LOAD OPERATION
Circuit controlled by switch.
Utility
Neutral
Ground
NOT USED 120Vac
277Vac
UNSWITCHED
INPUT
OUTPUT
SELECT THE
HOT
LINE
Neutral Hot
CIRCUIT #1
Neutral
Hot
TB1 LOCATION
input
Unswitched
{
UTILITY
UNSWITCHED
SWITCHED
INPUT
INPUT
(LOAD)
CORRECT
AT TB1
SWITCHED
INPUT
VOLTAGE
Important:
For 277 V output: red wire must
be removed from 120 V side of
terminal block and wired to 277 V
side of terminal block.
(120V)
NEUTRAL
NEUTRAL
FIGURE 6
NOTE: WIRING DIAGRAMS SIMPLIFIED FOR ILLUSTRATION.
ACTUAL POSITION OF COMPONENTS MAY VARY.
Configuration shown:
For 277V in // 277V out,
connect utility hot wire to 277V position
120V in // 120V out.
CONNECT RED WIRE TO
CORRESPONDING OUTPUT VOLTAGE
APPROPRIATE POSITION TO OBTAIN
Black
Red
TB1
Black
Red
Orange
TO OBTAIN
120Vac OUTPUT TO OBTAIN
277Vac OUTPUT
Orange
NEUTRAL
120Vac
277Vac
UNSWITCHED
INPUT
HOT
LINE
Neutral Hot
CIRCUIT #1
Configuration shown: 120V in // 120V out.
For 277V in // 277V out,
UNSWITCHED
SWITCHED
INPUT
INPUT Important:
For 277 V output: red wire
must be removed from 120 V
side of the terminal block and
wired to 277 V side of the
terminal block.
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE TO APPROPRIATE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
CORRESPONDING OUTPUT VOLTAGE
TB1
Utility
Neutral
Ground
Neutral
Hot(120V)
TB1 LOCATION
input
FIGURE 7 NOTE: WIRING DIAGRAMS SIMPLIFIED FOR ILLUSTRATION.
ACTUAL POSITION OF COMPONENTS MAY VARY.
Hot
UTILITY
CAP ALL
UNUSED Typical
cable
Hot
Neutral
Ground
NEUTRAL
WIRES
NOT USED
OUTPUT
SELECT THE
(LOAD)
CORRECT
AT TB1
SWITCHED
INPUT
VOLTAGE
NEUTRAL
connect utility hot wire to 277V position
{

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LMIU 1500W Mini Inverter
SYSTEM OPERATION
• The diagnostic/charger is a self-contained, fully automatic microcontroller-based system.
• When installation is complete, only the battery connection is needed. AC power need not be energized.
Unit goes directly into lockout mode and waits for AC power to be restored.
1. ALARM SILENCE / MANUAL TEST / SYSTEM INITIALIZATION
• Alarms are silenced by pushing the “TEST” switch less than one half second. Alarm can only be silenced after correcting the
fault or by re-initializing the system.
• Press the “TEST” switch for 1 second to initiate a 1 minute manual test
• System initialization is done by holding “TEST” switch for at least 6 seconds.
2. DIAGNOSTIC AND NEXUS® (OPTION)
If audible alarm is activated, any fault condition will produce an audible warning of an intermittent
beep: one second on, one second off.
See figure 8 for fault indicators.
a. BATTERY DISCONNECT / INVERTER FAILURE
Status indicator displays steady red LED if battery circuit is open or shorted, or if there is
an Inverter failure.
b. BATTERY FAILURE
1 red blink and a pause of 5 seconds: incorrect battery (e.g. 12V battery on a 6V system),
or battery has failed a timed or forced test (reached LVD level before the end of the test).
c. CHARGER FAILURE
2 red blinks and a pause of 4 seconds: charging current is not within limits corresponding
to charger command state.
d. LIGHTING LOAD CAPTURE SEQUENCE
Only initiated by a reset of system. Press “TEST” switch for at least 6 seconds. Reset
initializes the main counter. This re-initialization takes place to compensate for system
variations when the unit ages. Re-initialization is not allowed if there is a lighting load failure alarm. This is not applicable for units with
“No-Auto-Test plus No-Load-Detect” option.
e. SERVER FAILURE
The Nexus server (controller or PC) is no longer communicating with the RF unit’s modem. Confirm Nexus server is operating and check
whether other surrounding emergency lighting units are not powered. If surrounding emergency lighting units are powered “off”, the
surrounding emergency lighting units will prevent communication with the modem. Otherwise, reset the modem.
f. BLINK MODE
A “Blink mode” signal was sent from the Nexus server (controller or PC) to the emergency lighting unit. To stop the “Blink mode”, access
the Nexus server and execute a stop blink mode operation.
g. NOT COMMISSIONED
The unit is not registered in the Nexus server. Commission the unit. Auto-test will be disabled and the LED will show a steady green for
10 seconds and steady orange for 1 second.
To cancel a fault alarm display, reset unit after issue correction.
*Refer to Nexus® installation addendum for more details.ONS
3. AUTOMATIC UNIT TEST (30-DAY TEST)
Every 30 days, while in charging mode, the sequence generator will generate a command to energize the transfer on the emergency lighting
circuit for a variable test period depending on the yearly sequence.
• If the battery fails to complete the discharge test, the charger will display a battery failure and the test will abort.
• The 30-day automatic test sequence is reset every time the lighting load is turned on, including after a manual test.
FEATURES AND OPTIONS
IMPORTANT: Reset the system for each addition or change of lighting load. Press test switch for 6 seconds to reset the
system.
US (MIN)
NOTE:
AUTO-TESTING IS NOT PROVIDED IN SOME UNITS.
REFER TO FEATURE 9.
Monthly test 1
6 month test 30
12 month test 90
Figure 8

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LMIU 1500W Mini Inverter
4. LIGHTING LOAD TESTING
The test is fully automatic. To ensure accurate data from a connected and functional lighting load:
• The battery must be at or near full power. The program will delay data capture for a minimum of 48 hours following any discharge or reset.
• The charger must be in hysteresis mode (charger cycling on/off).
5. AUDIBLE ALARM (BUZZER)
Can be activated or de-activated in the field. Refer to Figure 9.
To select the audible alarm option:
a. Remove all power sources to the board (AC and battery).
b. Use long-nose pliers to remove the shunt (little black box) from the pins.
c. Replace the shunt according to the option selection.
d. Reconnect AC power and the battery.
6. SERVICE ALARM CONTACT (OPTION)
If installed, insert each wire of the Building Alarm Panel into separate terminals of the terminal block marked
“SERVICE ALARM”.
Alarm Panel will provide a 24V signal. The charger board will indicate a fault by closing a contact. Polarity is
not specified.
7. LIGHTING CONTROL OVERRIDE
Used with lighting loads equipped with low voltage dimming control. The dimming function must be disabled
during a power failure in order for the load to provide a 100% level of lighting.
The circuit consists of a single-pole dry-contact relay that is normally closed in stand-by operation. In
emergency mode (power failure) the relay contacts open and disconnect the dimming signal from the lighting load, allowing the load to operate at
100% light level.
INSTALLATION:
1. Locate the Lighting Control signal cable pair.
2. Cut, strip and extend one wire only, of the Lighting Control signal cable.
3. Connect to the terminal block marked "LIGHTING CONTROL OVERRIDE" as shown in the wiring diagram below.
8. UNITS WITH NO AUTO-TEST (OPTION)
This equipment is not self-testing in conformance with the Life Safety Code, ANSI/NFPA 101.
IMPORTANT: A minimum lamp load equivalent to 10% of the rated capacity of the unit must be installed.
Example: 150W for a 1500W inverter unit.
IMPORTANT: Only one control signal can be handled by one LCO module. Multi control signals require one LCO per control
signal. Consult customer service if there is more than one Lighting Control signal to be overridden.
BAT (+)BAT (-)
- +
RELAY
BUZZER
FAN
BUZZER
“Active”
BUZZER
“Silent”
Figure 9
Master
Lighting
Control
Open(cut) one side of the
Light Control
Lighting Control Cable
Wires to be connected into the
“Lighting Control Overeride”
terminal block.
LCO
Mini Inverter
LCO Contact Specification:
Max. voltage: 60V
Max. current: 250mA
A.C. load output
from the Mini Inverter.
Figure 10
Lighting Fixtures
(Fluorescent or LED)
used for emergency
lighting.

Tel: [phone] Fax: [phone] 750.2207 Rev. B
11/12
LMIU 1500W Mini Inverter
TROUBLESHOOTING GUIDE
STATUS
INDICATOR
(LED)
TROUBLESHOOTING GUIDE
SYMPTOMS PROBLEM CORRECTIVE ACTION
LED GREEN
ON Steady, not
flashing
Lamp load is ON None, if unit is in Normally ON
mode. Unit is operating correctly.
Lamp load is OFF None, if unit is in Normally OFF
mode. Unit is operating correctly.
Lamp load is OFF, but the
unit is in Normally ON
mode
Output fuses burned out.
- Verify output is not overloaded.
- Verify there is no short circuit in the load.
- Replace fuses.
Inverter module output fuse burnt
out.
Check field wiring on mini-inverter. Ensure no voltage is being
applied to the output of the mini-inverter. Replace fuse.
-Lamp load is OFF (if
installation is Normally OFF)
-Lamp load is ON (if
installation is Normally ON)
Power at primary AC input +
battery discharged (at LVD) + no
reaction with test button.
- Remove primary AC input + disconnect
battery + wait minimum 10 seconds.
- connect battery + connect primary AC input.
=> unit will restart.
- if unit did not restart, call technical support at 1-[phone].
LED flashing
GREEN/
ORANGE
Lamp load is ON None, if unit is in Normally ON
mode +Nexus option.
Unit is operating correctly. Unit is not commissioned to the Nexus
system.
Lamp load is OFF None, if unit is in Normally OFF
mode +Nexus option.
Unit is operating correctly. Unit is not commissioned to the Nexus
system.
LED flashing
GREEN/OFF
Lamp load is ON None, if unit is in test mode or is
sampling load. Unit is operating correctly.
Lamp load is OFF
Output fuses burned out.
- Verify output is not overloaded.
- Verify there is no short circuit in the load.
- Replace fuses.
Inverter module output fuse burnt
out.
Check field wiring on mini-inverter. Ensure no voltage is being
applied to the output of the mini-inverter. Replace fuse.
LED steady
OFF, not
flashing
Lamp load is ON No power at primary AC input + in
emergency mode. Check position of breaker feeding the Mini Inverter in the breaker
panel. If breaker has tripped, check for overload or short circuit.
See “AC SPECS” on page 1.
Lamp load is OFF
No power at primary AC input +
emergency mode stop (battery
discharged).
-Lamp load is OFF (if
installation is Normally
OFF)
-Lamp load is ON (if
installation is Normally ON)
Power at primary AC input +
battery discharged (at LVD) + no
reaction with test button.
- Remove primary AC input + disconnect
battery + wait minimum 10 seconds.
- connect battery + connect primary AC input.
=> the unit will restart.
- if unit did not restart, call for technical support at 1-[phone].
LED RED
steady ON +
GREEN LED
on PCBA
charger board
steady ON
Inverter Error
In emergency or in test, no output
(Inverter switch OFF).
Turn inverter ON/OFF switch to ON position.
(Switch is located on right end of inverter module.)
In emergency or in test, no output
(Inverter Failure).
Check inverter control RJ12/RJ50 cable to make sure cable it is
properly connected.
In emergency or in test, output OK
(Inverter Sensing defect). Check if yellow wire is connected. If not, connect. Refer to figure 4.
In emergency or in test, no output
(Inverter Failure).
Reset system (see page 7). If result is the same, replace inverter
module.
Over temperature in emergency
or in test.
- Verify LED Over Temp/Fault is ON on the inverter.
- Verify fan is blocked or not working.
- Call technical support at 1-[phone].
Over load in emergency or in test.
- Verify LED Overload/Fault is ON on the inverter.
- make sure the total load connected does not exceed the units
rated capacity. See note on page 1 above warranty information.

Tel: [phone] Fax: [phone] 750.2207 Rev. B
12/12
LMIU 1500W Mini Inverter
CONTACT CUSTOMER SERVICE FOR REPLACEMENT PARTS.
SERVICING MUST BE PERFORMED BY QUALIFIED PERSONNEL.
Consult Customer Service for current warranty information.
All information and specifications contained in these instructions are subject to change
due to engineer design, errors and omissions.
© 2022 ABB. All rights reserved.
LED RED
steady ON
Battery Disconnect Error
No battery installed in unit. Install battery following installation guide.
The 12V battery sensing not
connected. Check if yellow wire is connected. If not, connect. Refer to figure 4.
LED Flashing
RED 1 time
every 6 seconds
Battery Failure
Battery fails to complete manual
or monthly test. Replace batteries.
Battery fails to complete annual
test. Replace batteries.
Battery fail in charge. Replace batteries.
LED Flashing
RED 2 times
every 6 seconds
Charger Failure Charger not working. Reset unit (see page 7). If same error is displayed, replace charger
board.
LED Flashing
RED 3 times
every 6 seconds
Lamp Failure Loss of 10% or more of initial
lamp load. Replace the bad lamp and reset the unit.
-Lamp Failure
-No output voltage
Fuses are burned out.
- Verify output is not overloaded.
- Verify there is no short circuit in the load.
- Replace fuses.
Inverter module output fuse burnt
out.
Check field wiring on mini-inverter. Ensure no voltage is being
applied to the output of the mini-inverter. Replace fuse.
Loose connection to terminal
block. Verify that all wires are securely connected to terminal block.
LED AMBER
(ORANGE)
steady ON
Network server down Nexus modem is not sending a
signal to Nexus server. See Nexus manual system.
LED flashing
between
AMBER/OFF
Wink mode Unit is in yellow blink mode. Stop wink mode by sending a message from Nexus server or reset
the unit (see page 7).

1/16
Tel: [phone] Fax: [phone] 750.2208 Rev. B
LMIU1500W - 4 Option Mini Inverter
LMIU1500W - 4 Option Mini Inverter
INTERRUPTIBLE EMERGENCY LIGHTING
UNIT INVERTER INSTRUCTION MANUAL
THIS UNIT CONTAINS A
RECHARGEABLE VALVE-REGULATED
LEAD ACID BATTERY. PLEASE
RECYCLE OR DISPOSE OF
PROPERLY.
IMPORTANT SAFEGUARDS
When using electrical equipment, basic safety precautions should always be followed, including the following:
READ THIS MANUAL AND FOLLOW ALL SAFETY INSTRUC TIONS
THOROUGHLY BEFORE OPERATING THEULMIU INVERTER SYSTEM
SAVE THESE INSTRUCTIONS
1. Install in accordance with the National Electrical Code and local regulations.
2. The LMIU contains
potentially hazardous voltages. Installation, maintenance and service work should be performed by qualified
and trained personnel.
3. Units to be
installed only as per configuration described in this instruction manual.
4. Electricians and end-users need to ensure product system compatibility before final installation.
5. The AC voltage rating of this equipment is specified on the product label. Do not connect
the LMIU equipment to any other voltage.
6. All unused wires must be capped to prevent shorting.
7. The LMIU should be mounted securely and in locations and at heights where it will not be readily subjected to tampering by
unauthorized
personnel.
8. The use of accessory equipment and replacement parts not recommended by manufacturer may cause an unsafe condition and will
void the
warranty.
9. Do not mount near gas or electric heaters.
10. Do not let power supply cords touch hot surfaces.
11. Do not use this equipment for other than its intended
use.
12. DO NOT USE OUTDOORS.
13. The LMIU uses sealed valve regulated lead acid batteries. Batteries can be punctured if not handled properly, therefore use caution
when servicing batteries. In the event battery acid comes in contact with eyes or skin, flush with fresh water and consult a physician
immediately.
NOTE: At 120Vac, unit is rated at power factor 0.8. For loads having a power factor below 0.8, unit capacity needs to be derated.
At 277Vac, unit is rated at unity power factor. For loads having a power factor below 1, unit capacity needs to be derated.
All ABB inverter products receive 100% quality inspection before shipment to ensure proper and satisfactory operation.
When operated under normal conditions, ABB inverter products will provide years of dependable service.
For the complete warranty information, please refer to the landing page of our website (http://www.lightalarms.com).
BEFORE CONTACTING TECHNICAL SUPPORT MAKE SURE TO FOLLOW ALL STEPS IN SEQUENCE AND REFER TO
THE TROUBLESHOOTING GUIDE INCLUDED IN THIS MANUAL.
MODEL NUMBER AC SPECS EMERGENCY POWER AVAILABLE FOR LOAD APPROX.
WEIGHT
90 MIN 2H 3H 4H
LMIU1500 - 4 option 120/277 VAC, 60Hz 17.6 / 6.3 Amps 1500W 1136W 789W 673W 395lbs.
WARRANTY

Tel: [phone] Fax: [phone] 750.2208 Rev. B
2/16
LMIU1500W - 4 Option Mini Inverter
WARNING: DE-ENERGIZE THE CIRCUIT BEFORE INSTALLATION OR MAINTENANCE.
WARNING: DO NOT ENERGIZE THE CIRCUIT UNTIL ALL STEPS HAVE BEEN SUCCESSFULLY COMPLETED.
WARNING:
ALWAYS TURN OFF THE INVERTER MODULE AND THE AC SUPPLY TO THE EQUIPMENT AND
DISCONNECT THE BATTERY BEFORE SERVICING. ONLY QUALIFIED SERVICE TECHNICIANS
SHOULD SERVICE THIS EQUIPMENT. THE USE OF PARTS SUPPLIED BY OTHER THAN THE
MANUFACTURER MAY RESULT IN AN UNSAFE CONDITION OR EQUIPMENT FAILURE AND WILL
VOID THE WARRANTY.
WARNING: DO NOT CONNECT THE BATTERY(IES) UNTIL UNIT IS READY FROM PERMANENT START-UP.
PREMATURE CONNECTION MAY DRAIN BATTERIES AND PREVENT LATER START-UP.
WARNING: FAILURE TO CONNECT THE BATTERIES PROPERLY MAY RESULT IN EQUIPMENT FAILURE OR
AN UNSAFE CONDITION AND WILL VOID THE WARRANTY.
CAUTION: BATTERIES ARE SHIPPED SEPARATELY. PLACE THEM IN A LOCATION AWAY FROM THE WORK AREA
TO AVOID DAMAGE UNTIL INSTALLATION IN STEP 5.
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK
WHEN SERVICING, DISCONNECT BOTH NORMAL AND
EMERGENCY SOURCES: TURN OFF THE A.C. BRANCH CIRCUIT AND DISCONNECT THE BATTERY
AND TURN OFF THE INVERTER MODULE WITHIN THE MINI INVERTER.
CAUTION: ONLY ONE VOLTAGE IS ALLOWED (120V OR 277V). CONNECTION TO MORE THAN ONE VOLTAGE MAY
RESULT IN EQUIPMENT FAILURE AND VOID THE WARRANTY.
CAUTION:
THE MINI INVERTER HAS A SELF-TEST FEATURE AND CAN ENTER IN SELF-TEST MODE (MONTHLY,
BIANNUAL OR ANNUAL) AT ANY TIME. WHEN THIS OCCURS, POWER WILL BE AVAILABLE AT THE
OUTPUT OF THE MINI INVERTER, EVEN IF THE LATTER WAS CONFIGURED FOR NORMALLY-OFF
OPERATION.
IMPORTANT: FOLLOW THE APPROPRIATE WIRING DIAGRAMS. DO NOT CONNECT THE “INPUT POWER” NEUTRAL
TO THE “LOAD” NEUTRAL. FAILURE TO COMPLY MAY RESULT IN EQUIPMENT FAILURE AND VOID THE
WARRANTY.
IMPORTANT: FOR NORMALLY OFF AND SWITCHED LOADS: REMOVE THE JUMPER WIRE BEFORE WIRING THE UNIT.
REFER TO THE WIRING DIAGRAMS.
IMPORTANT:
ALL 0-10V LIGHTING CONTROL SIGNAL SHOULD BE RUN AS CLASS 2 (LOW VOLTAGE) WIRING. NEVER
RUN LINE VOLTAGE AND LOW VOLTAGE WIRING IN THE SAME CONDUIT AND PROVIDE SUFFICIENT
SEPARATION IN RACEWAY INSTALLATIONS. RUNNING THE 0-10 V SIGNAL AS CLASS 1 (LINE VOLTAGE)
WIRING INTRODUCES SOME CONCERNS, INCLUDING NOISE/ INTERFERENCE CAUSED BY COUPLING
BETWEEN THE LINE VOLTAGE AND LOW-VOLTAGE WIRES. THIS NOISE / INTERFERENCE CAN CAUSE A
VOLTAGE FLUCTUATION ON THE 0-10 V WIRES WHICH CAN CREATE A DIFFERENCE BETWEEN THE
LIGHT LEVEL REQUESTED BY THE CONTROL AND THE LIGHT LEVEL SIGNAL BEING RECEIVED BY THE
BALLAST / DRIVER.

Tel: [phone] Fax: [phone] 750.2208 Rev. B
3/16
LMIU1500W - 4 Option Mini Inverter
INSTALLATION
a. Remove the front cover of the Mini Inverter cabinets by removing the two screws located on the front of the cover of each cabinet and
retain for later use.
b. Extend the unswitched, properly-rated AC voltage supply and remote fixture wires to the installation area.
c. Orient cabinets to ensure clearance is 3.5 inches on either side of the Mini Inverter and 42 inches on the front. No clearance is
required on the bottom of the unit. For units equipped with optional wireless Nexus, a clearance of 6 inches is required on top to allow
for the protruding antenna. For units without wireless Nexus, no clearance is required on the top.
d. Mount the battery cabinet securely to the wall using the keyhole slots at the rear of the cabinet. Leave a minimum of 36 inches above
the battery cabinet for the electronic cabinet.
e. Place the electronic cabinet on top of the battery cabinet and align the four bolt/nut assemblies to the holes located on top of the
battery cabinet.
f. Install and tighten the lock washers and nuts onto the bolts inside the battery cabinet.
g. Mount the electronic cabinet securely to the wall using the keyhole slots at the rear of the cabinet.
h. Route the blue and red wires through the two holes located at the bottom of the electronic cabinet to the battery cabinet.
i. Connect the conduit containing the AC supply and remote fixture leads to the electronic cabinet. Route the incoming wires through
the knock-outs on the side of the Mini Inverter.
j. Install the batteries, but do not connect the battery leads until other wiring is completed.
k. Route the ground (green wire) from the electronic cabinet to the battery cabinet. Bolt the ground wire to the battery cabinet using the
nut and bolt provided.
STEP 1: MOUNTING THE MINI INVERTER TO WALL (SEE FIGURE 1)
WARNING:
MINI INVERTER MUST BE MOUNTED SECURELY USING A 1/4” (MIN) SCREW AND FLAT WASHER FOR
EVERY KEYHOLE. THE MOUNTING SURFACE MUST ALSO BE SUFFICIENTLY REINFORCED TO
ACCOMMODATE THE WEIGHT LISTED (SEE PAGE 1). FAILURE TO SECURE THE UNIT CAN DAMAGE THE
EQUIPMENT AND/OR CAUSE SERIOUS INJURY.
Bolt and spacer
Nut
FIGURE 1
Electronic cabinet
Battery cabinet
preassembled
to electronic cabinet.
Lock washer
Ground wire
location
CAUTION: CABINETS ARE HEAVY AND AWKWARD TO LIFT. MAKE PROPER PROVISIONS TO ENSURE SAFETY
OF INSTALLERS.
without internal
components
without internal
components

Tel: [phone] Fax: [phone] 750.2208 Rev. B
4/16
LMIU1500W - 4 Option Mini Inverter
a. Mini Inverter with option -4 can control four individual circuits (see figure 2).
b. Unit can be configured for either 120V in // 120V out or 277V in // 277V out.
c. Power applied to the UNSWITCHED INPUT charges the batteries.
d. The four SWITCHED INPUTs can each be configured to operate Normally-On, Normally-Off or Switched loads.
e. Power supplied to the switched inputs must be fed from the same branch circuit as the unswitched input (see figure 2).
f. Unit is shipped from factory pre-set for 120V in // 120V out and configured for Normally-On load operation (see figure 2). This
configuration can be changed to fulfill customer's application.
g. In Normal AC mode, the load connected at the output is powered by the power applied to the SWITCHED INPUT.
h. In Emergency mode, the load is powered by the battery through the inverter. The inverter converts the battery DC power to AC
power.
a. Output voltage of the Mini Inverter with option 4 can be configured for either 120VAC or 277VAC.
b. Identify the terminal block TB1 located on the bottom of the electronic cabinet.
c. Position of the red wire determines the voltage available at the output of the Mini Inverter.
i. When the red wire is connected at the left terminal of TB1, the output voltage available will be 120VAC.
ii. When the red wire is connected on the right terminal of TB1, the output voltage available will be 277VAC.
d. Identify the voltage rating of all the loads to be powered by the Mini Inverter.
i. If the voltage rating of the loads is 120VAC, connect the red wire to the left terminal of TB1.
ii. If the voltage rating of the loads is 277VAC, connect the red wire to the right terminal of TB1.
a. Connect the Ground wire to the Ground Bus Bar.
b. Identify the terminal block for UNSWITCHED INPUT (figures 5, 6, 7 or 8).
c. Connect the NEUTRAL wire to the NEUTRAL position of the UNSWITCHED INPUT terminal block.
d. Connect AC Line wire
i. 120V supply: connect AC line wire to the 120V position of the UNSWITCHED INPUT terminal block.
ii. 277V supply, connect AC Line wire to the 277V position of the UNSWITCHED INPUT terminal block.
ELECTRICAL SINGLE LINE DIAGRAM FOR LMIU 1500W WITH 4 CIRCUITS (-4 OPTION)
STEP 2: CONFIGURATION OF OUTPUT VOLTAGE (SEE FIGURE 2 AND 3)
STEP 3: WIRING TO UNSWITCHED INPUT
WARNING: ENSURE THE BRANCH CIRCUIT BREAKER FEEDING THE UNIT IS TURNED OFF AT THE SERVICE
PANEL BEFORE WIRING.
FIGURE 2
Circuit #1: Normally-ON
Circuit #2: Normally-OFF
Circuit #3 & 4: Switched
Normal Utility Panel 120V
Neutral
Ground
Neutral(Wht) CHARGER
BATTERY
24VDC
INVERTER
Circuit #4
120VAC(BLK)
277VAC(ORG)
SWITCHED INPUT
UNSWITCHED
INPUT
OUTPUT
HOT
NEU
Circuit #3
Circuit #2
Circuit #1
HOT
NEU
HOT
NEU
HOT
NEU
120VAC(BLK)
Neutral(Wht)
Neutral(Wht)
120V(BLK)
277V(ORG)
F4
F3
F2
F1
Mini Inverter comes pre-wired
for 120V. For 277V connections
remove red wire from
120V terminal and wire
to 277V terminal.
Transformer
Configuration:120Vin//120Vout
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
FIGURE 3
TB1
TB1
CORRESPONDING OUTPUT VOLTAGE
TO APPROPRIATE
3
4

Tel: [phone] Fax: [phone] 750.2208 Rev. B
5/16
LMIU1500W - 4 Option Mini Inverter
The Mini Inverter model with -4 option, and each circuit within in it, can be configured for various modes of operation as described below.
a. Normally-On Operation (Refer to Figure 5 for wiring details) - Fixtures remain illuminated in normal AC and emergency modes.
b. Normally-Off Operation (Refer to Figure 6 for wiring details) - Fixtures illuminated only upon loss of utility AC power.
c. Switched Load Operation (Refer to Figure 7 for wiring details) - Fixtures can be externally controlled and will illuminate upon
loss of utility AC power regardless of the state of the external control device (switch, motion sensor, dimmer, etc.).
d. Combination of Normally-On, Normally-Off and Switched Load Operation (Refer to Figure 8 for wiring details).
Refer to the applicable wiring diagram in figures 5, 6, 7 and 8 to connect the utility AC power and external control devices (where
applicable). Perform all wiring procedures in accordance with applicable codes. The unit is shipped configured to operate in Normally-On
mode by using an assembled jumper. This jumper can be removed to configure the SWITCHED INPUTS as desired.
DO NOT connect the Mini Inverter to the load at this time.
NOTE: All four switched inputs have been jumpered and is preset for 120VAC for Normally-On Operation. For 277VAC, remove jumper
wire from 120VAC input power terminal and reinstall jumper wire into 277VAC input power terminal.
a. Position the batteries in cabinet as shown. Make sure to respect the battery polarities.
b. The battery assembly consists of two battery strings, 24Vdc nominal each. Each battery string consists of two 12V batteries
connected in series. “Battery 1" and “Battery 2" form the first string. “Battery 3" and “Battery 4" form the second string. The two
24V battery strings are connected in parallel.
c. Route the RED (positive) and BLUE (negative) battery cables plus the thin yellow cable (AWG#22) from the electronic cabinet to
the battery cabinet.
d. Connect the battery interconnect cables ALONG WITH THE THIN YELLOW CABLE (AWG# 22).
e. Measure the DC voltage between the yellow cable and the main negative terminal of the battery bank. Confirm voltage is between
12V and 13V.
f. Connect the BLUE (negative) cable routed from the electronic cabinet to the main negative terminal of the battery bank.
g. Measure the DC voltage between the main positive terminal and the main negative terminal of the battery bank. Confirm voltage
is between 24V and 26V. If measured voltage is different, check battery wiring.
h. Connect the RED (positive) cable routed from the electronic cabinet to the main positive terminal of the battery bank.
i. Tighten all bolts to a torque of 78 lbf-in ± 4 lbf-in (figure 4).
Note: A small spark may occur when connecting to the battery wires. This is normal and is caused by large capacitors contained in the
mini inverter being charged.
STEP 4: WIRING TO SWITCHED INPUT
CAUTION: POWER SUPPLIED TO THE SWITCHED AND UNSWITCHED INPUTS MUST BE FED FROM THE SAME
BRANCH CIRCUIT.
CAUTION: A 277VAC rated switch is required for use with 277VAC input.
STEP 5: CONNECT BATTERIES (SEE FIGURE 4)
FIGURE 4
BLUE
RED
IMPORTANT:
YELLOW WIRE MUST BE
CONNECTED ALONG WITH
THE BLACK JUMPER WIRE
TO THE NEGATIVE (-) POST
OF THE BATTERY.
BLACK JUMPER
Battery 1
Battery 2
Battery 3
Battery 4
BLUE
RED
Main
Main
terminal
negative
positive
terminal

Tel: [phone] Fax: [phone] 750.2208 Rev. B
6/16
LMIU1500W - 4 Option Mini Inverter
a. Confirm load is not connected.
b. Follow start-up procedure in Step 7.
a. Turn on switch located on right hand side of inverter module in the electronic cabinet. Emergency lights and indicator will not
illuminate.
b. Energize AC main supply. Status Indicator on the left side of electronic cabinet will illuminate. For information on the Status
Indicator, see Information Section: FEATURES AND OPTIONS.
c. If status LED Indicator is not green, reset the system. (Refer to “SYSTEM RESET” - page 7).
d. Manually test unit by pressing test switch for 1 second. (Refer to “MANUAL TEST” - page 7).
Note: this will initiate a 1 minute manual test.
e. Measure and record voltage at the output of circuits 1, 2, 3 and 4.
f. Confirm measured output voltages match voltage rating of the loads.
g. Following the 1 minute test, simulate a power outage by turning off the AC main circuit breaker feeding the Mini Inverter.
h. Measure and record voltages at the output of circuits 1, 2, 3 and 4.
i. Confirm measured output voltages match voltage rating of the loads. If voltages do not match, check the wiring or call Technical
Support.
a. Turn off switch located on right-hand side of inverter module in the electronic cabinet.
b. Turn off AC main circuit breaker in the service panel feeding the Mini Inverter.
a. Confirm all circuits are de-energized.
b. Confirm that measured output voltage of Mini Inverter matches voltage rating of loads. Wire load.
c. Identify output terminal block (refer to figures 5, 6, 7 and 8).
Note: The neutrals of circuit# 1, circuit# 2, circuit# 3 and circuit# 4 are shorted.
d. Connect Ground wires from loads to Ground Bus Bar.
e. Connect neutral wires from loads to neutral terminals of output terminal block.
f. The neutrals of emergency fixtures must be wired to output terminal block.
g. Do not connect the neutral wire of emergency fixtures to neutral wire of normal non-emergency lighting fixtures.
h. Connect hot wires from emergency lighting loads to the “HOT” terminals of OUTPUT terminal block.
a. With loads connected, follow the start-up procedure in Step 7.
b. Normally-ON fixtures must be ON, Normally-OFF must be OFF. Switched Emergency Fixtures must only be ON when switch is in
ON position.
c. Re-install the cover of the Mini Inverter using original hardware.
STEP 6: START-UP WITH NO LOAD CONNECTED.
STEP 7: START-UP PROCEDURE
STEP 8: SHUT DOWN PROCEDURE.
STEP 9: CONNECT THE LOAD.
STEP 10: START-UP WITH LOAD CONNECTED.

Tel: [phone] Fax: [phone] 750.2208 Rev. B
7/16
LMIU1500W - 4 Option Mini Inverter
NEXUS® (OPTION)
NO WIRING IS REQUIRED FOR THE NEXUS® VERSION.
See Nexus® addendums: 750.1532 and 750.1641 for more information and antenna installation.
See Nexus®Pro addendums: 750.1641 and 750.2060 for antenna installation and important information before powering up unit.
MANUAL TEST
Press test switch for 1 second to initiate a 1 minute manual test. Status Indicator will flash green. All normally-ON lamps (switched or
unswitched) will turn ON. All normally-OFF lamps shall also be ON. After 1 minute test, lamps will revert to normal operating mode and
unit will revert to recharge mode. Status indicator will be steady ON green if no fault has been detected. If a fault is detected, refer to the
FEATURES AND OPTIONS pp. 12-14 for diagnostics and auto test features.
Allow the batteries to charge for a minimum of 48 hours after installation or power failure before conducting a 90-minute discharge test.
The Life Safety Code and the Authorities having Jurisdiction require an annual 90-minute discharge test.
SYSTEM RESET
Resetting the system:
Depending on the sequence of installation, some units may require a system reset. To reset, press and hold test switch on left
side of unit for 6 seconds.
NS
MAINTENANCE
BATTERY:
The batteries supplied in this equipment are high quality maintenance-free Valve Regulated Lead Acid design.
Ambient temperature of electrical room where batteries are installed should be 25° C (77° F) for maximum battery performance.
Replace batteries when they no longer operate the load for 90 minutes.
Replace only with manufacturer supplied parts.
Properly dispose of or recycle the Lead-Acid battery.

Tel: [phone] Fax: [phone] 750.2208 Rev. B
8/16
LMIU1500W - 4 Option Mini Inverter
NORMALLY-ON OPERATION
All four(4) circuits configured to operate in Normally-On mode.
Important:
For 277 V output: red wire must
be removed from 120 V side of
terminal block and wired to 277 V
side of terminal block.
Orange
Black
Red
TO OBTAIN
120Vac OUTPUT
CONNECT RED WIRE TO APPROPRIATE
POSITION TO OBTAIN
TO OBTAIN
277Vac OUTPUT
Orange
Black
Red
CORRESPONDING OUTPUT VOLTAGE
TB1
Switched input
Utility
Neutral
Ground
NEUTRAL
120Vac
277Vac
UNSWITCHED
INPUT
OUTPUT(LOAD)
SELECT THE CORRECT VOLTAGE AT TB1
CIRCUIT #3
HOT
SWITCHED (CONTROLLED)
NOT
LINE
CIRCUIT #4
CIRCUIT #2
CIRCUIT #1
HOT
HOT
HOT
NOT
LINE
NOT
LINE
NOT
LINE
Neutral Hot
CIRCUIT
#4 #3 #2 #1
USED
USED
USED USED
CIRCUIT CIRCUIT CIRCUIT
Neutral Hot
Neutral Hot
Neutral Hot
CIRCUIT #4 CIRCUIT #3 CIRCUIT #2 CIRCUIT #1
Neutral
Hot(120V)
TB1 LOCATION
input
FIGURE 5
NOTE: WIRING DIAGRAMS
ACTUAL POSITION OF COMPONENTS
Configuration shown: 120V in // 120V out.
For 277V in // 277V out, connect utility hot wire to 277V position
{
Unswitched
{
UTILITY
UNSWITCHED
SWITCHED
INPUT
OUTPUT
INPUT
Blue
Unit shipped with assembled jumper in place.
SIMPLIFIED FOR ILLUSTRATION.
MAY VARY.
INPUT
NEUTRAL
NEUTRAL
NEUTRAL
NEUTRAL